Form 10-Q - Quarterly report [Sections 13 or 15(d)]

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark one)

☒QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2024

☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from _________ to _________

Commission File Number 001-38128

CHECKPOINT THERAPEUTICS, INC.

(Exact name of registrant as specified in its charter)

Delaware		47-2568632
(State or other jurisdiction of incorporation or organization)		(I.R.S. Employer Identification No.)

95 Sawyer Road, Suite 110, Waltham, MA 02453

(Address of principal executive offices and zip code)

(781) 652-4500

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Common Stock, par value $0.0001 per share		CKPT		NASDAQ Capital Market

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. YES ☒ NO ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). YES ☒ NO ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See definition of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large Accelerated Filer	☐	Accelerated Filer	☐
Non-accelerated Filer	☒	Smaller Reporting Company	☒
Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). YES ☐ NO ☒

Indicate the number of shares outstanding of each of the registrant’s classes of common stock, as of the latest practicable date.

Class of Common Stock		Outstanding Shares as of May 7, 2024
Class A Common Stock, $0.0001 par value		700,000
Common Stock, $0.0001 par value		36,150,279

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CHECKPOINT THERAPEUTICS, INC.

Form 10-Q

For the Quarter Ended March 31, 2024

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		Page No.
PART I. FINANCIAL INFORMATION

Item 1.	Financial Statements	3

	Condensed Balance Sheets as of March 31, 2024 and December 31, 2023	3

	Condensed Statements of Operations for the three months ended March 31, 2024 and 2023	4

	Condensed Statements of Stockholders’ Equity (Deficit) for the three months ended March 31, 2024 and 2023	5

	Condensed Statements of Cash Flows for the three months ended March 31, 2024 and 2023	6

	Notes to Condensed Financial Statements	7

Item 2.	Management’s Discussion and Analysis of the Results of Operations	23

Item 3.	Quantitative and Qualitative Disclosures about Market Risk	27

Item 4.	Controls and Procedures	27

PART II. OTHER INFORMATION

Item 1.	Legal Proceedings	28

Item 1A.	Risk Factors	28

Item 2.	Recent Sales of Unregistered Securities	58

Item 6.	Exhibits	59

Signatures		60

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SUMMARY OF RISK FACTORS

Our business is subject to risks of which you should be aware before making an investment decision. The risks described below are a summary of the principal risks associated with an investment in us and are not the only risks we face. You should carefully consider these risk factors, the risk factors described in Item 1A, and the other reports and documents that we have filed with the Securities and Exchange Commission (“SEC”).

Risks Related to our Finances and Capital Requirements

●

We have incurred significant losses since our inception and anticipate that we will incur continued losses for the foreseeable future. We have not generated any sales revenue from our development stage products, and we do not know when, or if, we will generate any revenue from sales of an approved product.

●

There is substantial doubt about our ability to continue as a going concern, which may hinder our ability to obtain future financing.

●

Our success is contingent upon raising additional capital for our development programs and commercialization efforts, which may fail. Even if successful, our future capital raising activities may dilute our current stockholders, restrict our operations, or require us to relinquish proprietary rights.

●

Our limited resources may cause us to fail to capitalize on programs or product candidates presenting commercial opportunity or high likelihood of success.

●

Weakness in the U.S. economy, including within our geographic footprint, has adversely affected us in the past and may adversely affect us in the future.

Risks Pertaining to our Business Strategy, Structure and Organization

●

Our future growth and success depend on our ability to successfully develop and commercialize our product candidates, which we have yet to do.

●

Our future growth depends on our acquiring or in-licensing products or product candidates and integrating such products into our business.

Risks Inherent in Drug Development and Commercialization

●

Because results of preclinical studies and early clinical trials are not necessarily predictive of future results, any product candidate we advance may not have favorable results in later clinical trials. Moreover, interim, “top-line,” and preliminary data from our clinical trials that we announce or publish may change, or the perceived product profile may be impacted, as more patient data or additional endpoints are analyzed.

●

We may not receive the required regulatory approvals for any of our product candidates on our projected timelines, if at all, which may result in increased costs and delay our ability to generate revenue.

●

If a product candidate demonstrates lack of efficacy or adverse side effects, we may need to abandon or limit the development of such product candidate.

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We may not obtain the desired labeling claims or intended uses for product promotion, or favorable scheduling classifications, to successfully promote our products.

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Even if a product candidate is approved, it may be subject to various post-marketing requirements, including studies or clinical trials, and increased regulatory scrutiny.

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Our competitors have developed or may develop treatments for our products’ target indications, which could limit our product candidates’ commercial opportunity and profitability.

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If our products are not broadly accepted by the healthcare community, the revenues from any such product will likely be limited.

●

Any successful products liability claim related to any of our current or future product candidates may cause us to incur substantial liability and limit the commercialization of such products.

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Risks Related to Reliance on Third Parties

●

We rely, and will rely in the future, on third-party contract research organizations and contract manufacturers for the conduct of our preclinical and clinical studies and trials, for the completion of commercial and pre-commercial manufacturing and, eventually, for commercialization. If such third parties fail to perform contractual obligations, pass regulatory inspections or re-inspections, meet deadlines, comply with applicable regulations, or if our relationships with such third parties are disrupted, our product candidates may be delayed, and our revenue potential may be limited.

●

We rely on clinical data and results obtained by third parties, which may prove inaccurate or unreliable.

Risks Relating to Legislation and Regulation Affecting the Biopharmaceutical and Other Industries

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We operate in a heavily regulated industry, and we cannot predict the impact that any future legislation or administrative or executive action may have on our operations.

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We may be subject to anti-kickback, fraud and abuse, false claims, transparency, health information privacy and security and other healthcare laws and regulations, which could expose us to criminal sanctions, civil penalties, contractual damages, reputational harm, administrative burdens and diminished profits and future earnings.

Risks Pertaining to Intellectual Property and Potential Disputes with Licensors Thereof

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If we are unable to maintain sufficient patent protection for our technology and products, our competitors could develop and commercialize products similar or identical to ours, impairing our ability to successfully commercialize potential products.

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We or our licensors may be subject to costly and time-consuming litigation for infringement of third-party intellectual property rights or to enforce our or our licensors’ patents.

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Any dispute with our licensors may affect our ability to develop or commercialize our product candidates.

Risks Relating to Our Platform and Data

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Our business and operations would suffer in the event of computer system failures, cyber-attacks, or deficiencies in our or third parties’ cybersecurity.

Risks Relating to Our Control by Fortress Biotech, Inc. (“Fortress”)

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Fortress controls a voting majority of our common stock and has the right to receive significant share grants annually, which will result in dilution of our other stockholders and could reduce the value of our common stock.

●

We have entered into certain agreements with Fortress and may have received better terms from unaffiliated third parties.

Risks Related to Conflicts of Interest

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We share certain directors with Fortress, which could create conflicts of interest between us and Fortress.

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Item 1. Financial Statements.

Checkpoint Therapeutics, Inc.

Condensed Balance Sheets

(in thousands, except share and per share amounts)

(Unaudited)


	March 31, 2024		December 31, 2023
ASSETS
Current Assets:
Cash and cash equivalents	$	11,241	$	4,928
Prepaid expenses and other current assets		734		450
Total current assets		11,975		5,378
Total Assets	$	11,975	$	5,378

LIABILITIES AND STOCKHOLDERS’ EQUITY
Current Liabilities:
Accounts payable and accrued expenses	$	19,159	$	15,485
Accounts payable and accrued expenses - related party		2,941		2,815
Common stock warrant liabilities		125		125
Total current liabilities		22,225		18,425
Total Liabilities		22,225		18,425

Commitments and Contingencies (note 5)

Stockholders’ Equity (Deficit)
Common Stock ($0.0001 par value), 80,000,000 shares authorized as of March 31, 2024 and December 31, 2023
Class A common shares, 700,000 shares issued and outstanding as of March 31, 2024 and December 31, 2023		—		—
Common shares, 34,986,279 and 27,042,035 shares issued and outstanding as of March 31, 2024 and December 31, 2023, respectively		4		3
Common stock issuable, 1,492,915 shares as of March 31, 2024 and December 31, 2023		3,419		3,419
Additional paid-in capital		311,605		297,864
Accumulated deficit		(325,278)		(314,333)
Total Stockholders’ Equity (Deficit)		(10,250)		(13,047)
Total Liabilities and Stockholders’ Equity (Deficit)	$	11,975	$	5,378

The accompanying notes are an integral part of these condensed financial statements.

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Checkpoint Therapeutics, Inc.

Condensed Statements of Operations

(in thousands, except share and per share amounts)

(Unaudited)


	For the three months ended March 31,
	2024		2023
Revenue - related party	$	—	$	35

Operating expenses:
Research and development		8,497		15,826
General and administrative		2,451		2,292
Total operating expenses		10,948		18,118
Loss from operations		(10,948)		(18,083)

Other income:
Interest income		4		43
Gain on common stock warrant liabilities		—		7,566
Foreign currency exchange loss		(1)		—
Total other income		3		7,609
Net Loss	$	(10,945)	$	(10,474)

Loss per Share:
Basic and diluted net loss per common share outstanding	$	(0.33)	$	(0.89)
Basic and diluted weighted average number of common shares outstanding		32,930,977		11,749,139

The accompanying notes are an integral part of these condensed financial statements.

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Checkpoint Therapeutics, Inc.

Condensed Statements of Stockholders’ Equity (Deficit)

(in thousands, except share amounts)

(Unaudited)

For the Three Months Ended March 31, 2024


							Common		Additional				Total
	Class A Common Shares			Common Shares			Stock		Paid-in		Accumulated		Stockholders’
	Shares	Amount		Shares	Amount		Issuable		Capital		Deficit		Equity (Deficit)
Balances at December 31, 2023	700,000	$	—	27,042,035	$	3	$	3,419	$	297,864	$	(314,333)	$	(13,047)
Issuance of common shares, net of offering costs - Registered direct offering	—		—	1,275,000		1		—		12,636		—		12,637
Issuance of common shares - Founders Agreement	—		—	193,905		—		—		396		—		396
Stock-based compensation expense	—		—	2,680,106		—		—		709		—		709
Exercise of pre-funded and common stock warrants, including inducement	—		—	3,795,233		—		—		—		—		—
Net loss	—		—	—		—		—		—		(10,945)		(10,945)
Balances at March 31, 2024	700,000	$	—	34,986,279	$	4	$	3,419	$	311,605	$	(325,278)	$	(10,250)

For the Three Months Ended March 31, 2023


							Common		Additional				Total
	Class A Common Shares			Common Shares			Stock		Paid-in		Accumulated		Stockholders’
	Shares	Amount		Shares	Amount		Issuable		Capital		Deficit		Equity (Deficit)
Balances at December 31, 2022	700,000	$	—	9,586,683	$	1	$	1,885	$	241,117	$	(262,486)	$	(19,483)
Issuance of common shares, net of offering costs - Registered direct offering	—		—	1,180,000		—		—		6,653		—		6,653
Issuance of common shares - Founders Agreement	—		—	404,621		—		(1,885)		2,041		—		156
Stock-based compensation expense	—		—	996,950		—		—		969		—		969
Exercise of pre-funded and common stock warrants	—		—	1,032,816		—		—		—		—		—
Net loss	—		—	—		—		—		—		(10,474)		(10,474)
Balances at March 31, 2023	700,000	$	—	13,201,070	$	1	$	—	$	250,780	$	(272,960)	$	(22,179)

The accompanying notes are an integral part of these condensed financial statements.

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Checkpoint Therapeutics, Inc.

Condensed Statements of Cash Flows

(in thousands)

(Unaudited)


	For the three months ended March 31,
	2024		2023
Cash Flows from Operating Activities:
Net loss	$	(10,945)	$	(10,474)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense		709		969
Issuance of common shares - Founders Agreement		396		156
Gain on common stock warrant liabilities		—		(7,566)
Changes in operating assets and liabilities:
Prepaid expenses and other current assets		(284)		134
Other receivables - related party		—		38
Accounts payable and accrued expenses		3,524		2,167
Accounts payable and accrued expenses - related party		126		545
Net cash used in operating activities		(6,474)		(14,031)

Cash Flows from Financing Activities:
Proceeds from issuance of common shares - Registered direct offerings		14,000		7,500
Payment of offering costs for the issuance of common shares - Registered direct offerings		(1,213)		(691)
Net cash provided by financing activities		12,787		6,809

Net increase (decrease) in cash and cash equivalents		6,313		(7,222)
Cash and cash equivalents at beginning of period		4,928		12,068
Cash and cash equivalents at end of period	$	11,241	$	4,846

Supplemental disclosure of noncash investing and financing activities:
Issuance of common shares - Founders Agreement	$	—	$	1,885
Issuance of common shares - Registered direct offering (offering costs incurred but not paid)	$	150	$	156

The accompanying notes are an integral part of these condensed financial statements.

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Checkpoint Therapeutics, Inc.

Notes to Condensed Financial Statements

(Unaudited)

Note 1 - Organization and Description of Business Operations

Checkpoint Therapeutics, Inc. (the “Company” or “Checkpoint”) was incorporated in Delaware on November 10, 2014. Checkpoint is a clinical-stage immunotherapy and targeted oncology company focused on the acquisition, development and commercialization of novel treatments for patients with solid tumor cancers. The Company may acquire rights to these technologies by licensing the rights or otherwise acquiring an ownership interest in the technologies, funding their research and development and eventually either out-licensing or bringing the technologies to market.

The Company is a majority-controlled subsidiary of Fortress Biotech, Inc. (“Fortress”).

The Company’s common stock is listed on the NASDAQ Capital Market and trades under the symbol “CKPT.”

Liquidity, Capital Resources and Going Concern

The Company has incurred substantial operating losses since its inception and expects to continue to incur significant operating losses for the foreseeable future and may never become profitable. As of March 31, 2024, the Company had an accumulated deficit of $325.3 million.

In February 2023, the Company closed on a registered direct offering (the “February 2023 Registered Direct Offering”) for the issuance and sale of an aggregate of 1,180,000 shares of its common stock at a purchase price of $5.25 per share in a registered direct offering. In addition, the offering includes 248,572 shares of common stock in the form of pre-funded warrants at a price of $5.2499. In a concurrent private placement, Checkpoint issued and sold Series A warrants to purchase up to 1,428,572 shares of common stock and Series B warrants to purchase up to 1,428,572 shares of common stock. The Series A and B warrants are exercisable immediately upon issuance with an exercise price of $5.00 per share. The Series A warrants will expire five years following the issuance date and the Series B warrants will expire eighteen months following the issuance date. The total gross proceeds from the offering were approximately $7.5 million with net proceeds of approximately $6.7 million after deducting approximately $0.8 million in commissions and other transaction costs.

In April 2023, the Company closed on a registered direct offering (the “April 2023 Registered Direct Offering”) for the issuance and sale of an aggregate of 1,700,000 shares of its common stock at a purchase price of $3.60 per share of common stock in a registered direct offering. In a concurrent private placement, Checkpoint issued and sold Series A warrants to purchase up to 1,700,000 shares of common stock and Series B warrants to purchase up to 1,700,000 shares of common stock. The Series A and B warrants are exercisable immediately upon issuance with an exercise price of $3.35 per share. The Series A warrants will expire five years following the issuance date and the Series B warrants will expire eighteen months following the issuance date. The total gross proceeds from the offering were approximately $6.1 million with net proceeds of approximately $5.5 million after deducting approximately $0.6 million in commissions and other transaction costs.

In May 2023, the Company closed on a registered direct offering (the “May 2023 Registered Direct Offering”) for the issuance and sale of an aggregate of 1,650,000 shares of its common stock at a purchase price of $3.071 per share of common stock in a registered direct offering. In addition, the offering includes 1,606,269 shares of common stock in the form of pre-funded warrants at a price of $3.0709. The common stock and the pre-funded warrants were sold together with Series A warrants to purchase up to 3,256,269 shares of common stock and Series B warrants to purchase up to 3,256,269 shares of common stock. The Series A and B warrants are exercisable immediately upon issuance with an exercise price of $2.821 per share. The Series A warrants will expire five years following the issuance date and the Series B warrants will expire eighteen months following the issuance date. The total gross proceeds from the offering were approximately $10.0 million with net proceeds of approximately $9.1 million after deducting approximately $0.9 million in commissions and other transaction costs.

In July 2023, the Company closed on a registered direct offering (the “July 2023 Registered Direct Offering”) for the issuance and sale of an aggregate of 2,427,186 shares of its common stock at a purchase price of $3.09 per share of common stock in a registered direct offering. In addition, the offering includes 809,062 shares of common stock in the form of pre-funded warrants at a price of $3.0899. The common stock and the pre-funded warrants were sold together with Series A warrants to purchase up to 3,236,248 shares of common stock and Series B warrants to purchase up to 3,236,248 shares of common stock. The Series A and B warrants are exercisable immediately upon issuance with an exercise price of $2.84 per share. The Series A warrants will expire five years following the issuance

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Checkpoint Therapeutics, Inc.

Notes to Condensed Financial Statements

(Unaudited)

date and the Series B warrants will expire eighteen months following the issuance date. The total gross proceeds from the offering were approximately $10.0 million with net proceeds of approximately $9.1 million after deducting approximately $0.9 million in commissions and other transaction costs.

In October 2023, the Company entered into an inducement offer letter agreement (the “October 2023 Inducement”) with a certain holder of its existing warrants to exercise for cash an aggregate of 6,325,354 shares of the Company’s common stock at a reduced exercise price of $1.76 per share. The warrants were issued to the holder on December 16, 2022 with an exercise price of $4.075 per share and on February 22, 2023 with an exercise price of $5.00 per share as part of registered direct offerings. As part of the October 2023 Inducement, the Company agreed to issue new unregistered Series A Warrants to purchase up to 6,325,354 shares of Common Stock and new unregistered Series B Warrants to purchase up to 6,325,354 shares of Common Stock. The Series A and B warrants are exercisable immediately upon issuance with an exercise price of $1.51 per share. The Series A warrants will expire five years following the issuance date and the Series B warrants will expire twenty-four months following the issuance date. The total gross proceeds from the exercise were approximately $11.1 million with net proceeds of approximately $10.0 million after deducting approximately $1.1 million in commissions and other transaction costs.

In January 2024, the Company closed on a registered direct offering (the “January 2024 Registered Direct Offering”) for the issuance and sale of an aggregate of 1,275,000 shares of its common stock at a purchase price of $1.805 per share of common stock. In addition, the offering includes 6,481,233 shares of common stock in the form of pre-funded warrants at a price of $1.8049. In a concurrent private placement, Checkpoint issued and sold common warrants (the “January 2024 Common Stock Warrants”) to purchase up to 7,756,233 shares of common stock. The January 2024 Common Stock Warrants are exercisable immediately upon issuance with an exercise price of $1.68 per share and will expire five years following the issuance date. The total gross proceeds from the January 2024 Registered Direct Offering were approximately $14.0 million with net proceeds of approximately $12.8 million after deducting approximately $1.2 million in commissions and other transaction costs.

The Company expects to continue to use the proceeds from previous financing transactions primarily for general corporate purposes, which may include financing the Company’s growth, developing new or existing product candidates, and funding capital expenditures, acquisitions, and investments.

In accordance with Accounting Standards Codification (“ASC”) 205-40, Going Concern, the Company evaluated whether there are conditions and events, considered in the aggregate, that raise substantial doubt about its ability to continue as a going concern within one year after the date that these financial statements are issued. This evaluation initially does not take into consideration the potential mitigating effect of management’s plans that have not been fully implemented as of the date the financial statements are issued. When substantial doubt exists under this methodology, management evaluates whether the mitigating effect of its plans sufficiently alleviates substantial doubt about the Company’s ability to continue as a going concern. The mitigating effect of management’s plans, however, is only considered if both (1) it is probable that the plans will be effectively implemented within one year after the date that the financial statements are issued, and (2) it is probable that the plans, when implemented, will mitigate the relevant conditions or events that raise substantial doubt about the entity’s ability to continue as a going concern within one year after the date that these consolidated financial statements are issued. In performing its analysis, management excluded certain elements of its operating plan that cannot be considered probable. Under ASC 205-40, the future receipt of potential funding from future equity or debt issuances and other potential sources such as partnerships cannot be considered probable at this time because these plans are not entirely within the Company’s control nor have these plans been approved by the Board of Directors as of the date of these financial statements.

The Company believes that its cash and cash equivalents are only sufficient to fund its operating expenses into the third quarter of 2024, assuming no exercises of outstanding cash warrants. The Company has suffered recurring losses from operations and has a net capital deficiency that raises substantial doubt regarding the Company’s ability to continue as a going concern for a period of one year after the date that these financial statements are issued. Management’s plans to alleviate the conditions that raise substantial doubt include reduced 2024 spending, including projected savings through delaying the development timelines of certain programs and the pursuit of additional cash resources through public or private equity or debt financings and potential partnerships. Management has concluded that the likelihood that its plan to successfully obtain sufficient funding from one or more of these sources, or adequately reduce expenditures, while reasonably possible, is less than probable. Accordingly, the Company has concluded that substantial doubt exists about the Company’s ability to continue as a going concern for a period of at least 12 months from the date of issuance of these financial statements. The Company’s estimate as to how long it expects its existing cash to be able to continue to fund its operations is based on assumptions that may prove to be wrong, and it could use its available capital resources sooner than it currently expects. Further,

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Checkpoint Therapeutics, Inc.

Notes to Condensed Financial Statements

(Unaudited)

changing circumstances, some of which may be beyond its control, could cause the Company to consume capital faster than it currently anticipates, and it may need to seek additional funds sooner than planned. The Company cannot be certain that additional funding will be available to it on acceptable terms, or at all.

The accompanying financial statements have been prepared on a going concern basis, which contemplates the realization of assets and satisfaction of liabilities in the ordinary course of business. The financial statements do not include any adjustments relating to the recoverability and classification of recorded asset amounts or the amounts and classification of liabilities that might result from the outcome of the uncertainties described above.

Note 2 - Significant Accounting Policies

Basis of Presentation

The accompanying unaudited interim condensed financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X of the Exchange Act. Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements. In the opinion of management, the unaudited interim condensed financial statements reflect all adjustments, which include only normal recurring adjustments necessary for the fair statement of the balances and results for the periods presented. They may not include all of the information and notes required by GAAP for complete financial statements. Therefore, these condensed financial statements should be read in conjunction with the Company’s audited financial statements and notes thereto for the year ended December 31, 2023, which were included in the Company’s Form 10-K, and filed with the SEC on March 22, 2024. The results of operations for any interim periods are not necessarily indicative of the results that may be expected for the entire fiscal year or any other interim period.

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of expenses during the reporting period. Actual results could differ from those estimates.

Significant Accounting Policies

There have been no material changes in the Company’s significant accounting policies to those previously disclosed in the 2023 Annual Report on Form 10-K.

Cash and Cash Equivalents

The Company considers highly liquid investments with an original maturity of three months or less when purchased to be cash equivalents.

Research and Development Costs

Research and development costs are expensed as incurred. Advance payments for goods and services that will be used in future research and development activities are expensed when the activity has been performed or when the goods have been received rather than when the payment is made. Upfront and milestone payments due to third parties that perform research and development services on the Company’s behalf will be expensed as services are rendered or when the milestone is achieved.

Research and development costs primarily consist of personnel related expenses, including salaries, benefits, travel, and other related expenses, stock-based compensation, payments made to third parties for license and milestone costs related to in-licensed products and technology, payments made to third party contract research organizations for preclinical and clinical studies, investigative sites for clinical trials, consultants, the cost of acquiring and manufacturing clinical trial materials, costs associated with regulatory filings, laboratory costs and other supplies.

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Checkpoint Therapeutics, Inc.

Notes to Condensed Financial Statements

(Unaudited)

In accordance with Accounting Standards Codification (“ASC”) 730-10-25-1, Research and Development, costs incurred in obtaining technology licenses are charged to research and development expense if the technology licensed has not reached commercial feasibility and has no alternative future use. Such licenses purchased by the Company require substantial completion of research and development, regulatory and marketing approval efforts in order to reach commercial feasibility and have no alternative future use.

Annual Equity Fee

Under the Founders Agreement with Checkpoint dated March 17, 2015, and amended and restated in July 2016 and October 2017 (the “Founders Agreement”), Fortress is entitled to an annual equity fee on January 1 of each year equal to 2.5% of fully diluted outstanding equity of the Company, payable in Checkpoint common shares (“Annual Equity Fee”). The Annual Equity Fee was part of the consideration payable for formation of the Company, identification of certain assets, including the license contributed to Checkpoint by Fortress (see Note 4).

The Company records the Annual Equity Fee in connection with the Founders Agreement with Fortress as contingent consideration. Contingent consideration is recorded when probable and reasonably estimable. Due to the nature of the Company’s assets and stage of development, future share prices and shares outstanding cannot be estimated prior to the issuance of the Annual Equity Fee. Due to these uncertainties, the Company has concluded that it is unable to reasonably estimate the contingent consideration until shares are actually issued on January 1 of each year.

Pursuant to the Founders Agreement, the Company was to issue 1,492,915 shares of common stock to Fortress for the Annual Equity Fee, representing 2.5% of the fully diluted outstanding equity of Checkpoint on January 1, 2024. The Company did not have enough unreserved authorized shares under its certificate of incorporation on January 1, 2024 to issue the shares for the Annual Equity Fee. Therefore, in December 2023, Fortress and Checkpoint mutually agreed to defer the issuance until such time as certificate of incorporation has been amended in order to increase the number of authorized that may be issued thereunder. Because the number of outstanding shares issuable to Fortress was determinable on January 1, 2024 prior to the issuance of the December 31, 2023 financial statements, the Company recorded approximately $3.4 million in research and development expense and a credit to Common shares issuable - Founders Agreement during the year ended December 31, 2023.

Stock-Based Compensation Expenses

The Company expenses stock-based compensation over the requisite service period based on the estimated grant-date fair value of the awards and forfeiture rates. The Company accounts for forfeitures as they occur.

The Company estimates the fair value of stock option grants using the Black-Scholes Model. The assumptions used in calculating the fair value of stock-based awards represent management’s best estimates and involve inherent uncertainties and the application of management’s judgment. All stock-based compensation costs are recorded in general and administrative or research and development costs in the Condensed Statements of Operations based upon the underlying individual’s role at the Company.

In addition, because some of the restricted stock, restricted stock units and options issued to employees, directors and consultants vest upon achievement of certain milestones, the total expense is uncertain. Compensation expense for such awards that vest upon the achievement of milestones is recognized when the achievement of such milestones is probable.

Common Stock Warrant Liability

The Company has issued freestanding warrants to purchase shares of its common stock in connection with its financing activities and accounts for them in accordance with applicable accounting guidance as either liabilities or as equity instruments depending on the specific terms of the warrant agreements. Warrants classified as liabilities are remeasured each period they are outstanding. Any resulting gain or loss related to the change in the fair value of the warrant liability is recognized in gain (loss) on common stock warrant liabilities, a component of other income (loss), in the Condensed Statements of Operations.

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Checkpoint Therapeutics, Inc.

Notes to Condensed Financial Statements

(Unaudited)

The Company estimates the fair value of common stock warrant liabilities using the Black-Scholes Model. The assumptions used in calculating the fair value represent management’s best estimates and involve inherent uncertainties and the application of management’s judgment.

Fair Value Measurement

The Company follows the accounting guidance in ASC 820 for its fair value measurements of financial assets and liabilities measured at fair value on a recurring basis. Under this accounting guidance, fair value is defined as an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or a liability.

The accounting guidance requires fair value measurements be classified and disclosed in one of the following three categories:

Level 1:

Quoted prices in active markets for identical assets or liabilities.

Level 2:

Observable inputs other than Level 1 prices, for similar assets or liabilities that are directly or indirectly observable in the marketplace.

Level 3:

Unobservable inputs which are supported by little or no market activity and that are financial instruments whose values are determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant judgment or estimation.

The fair value hierarchy also requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Assets and liabilities measured at fair value are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.

Certain of the Company’s financial instruments are not measured at fair value on a recurring basis but are recorded at amounts that approximate their fair value due to their liquid or short-term nature, such as accounts payable and accrued expenses.

Revenue from Contracts with Customers

The Company recognizes revenue under ASC 606, “Revenue from Contracts with Customers”. The core principle of the standard is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. The following five steps are applied to achieve that core principle:

●

Step 1: Identify the contract with the customer.

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Step 2: Identify the performance obligations in the contract.

●

Step 3: Determine the transaction price.

●

Step 4: Allocate the transaction price to the performance obligations in the contract.

●

Step 5: Recognize revenue when the company satisfies a performance obligation.

In order to identify the performance obligations in a contract with a customer, a company must assess the promised goods or services in the contract and identify each promised good or service that is distinct. A performance obligation meets ASC 606’s definition of a “distinct” good or service (or bundle of goods or services) if both of the following criteria are met:

●

the customer can benefit from the good or service either on its own or together with other resources that are readily available to the customer (i.e., the good or service is capable of being distinct); and

●

the entity’s promise to transfer the good or service to the customer is separately identifiable from other promises in the contract (i.e., the promise to transfer the good or service is distinct within the context of the contract).

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Checkpoint Therapeutics, Inc.

Notes to Condensed Financial Statements

(Unaudited)

If a good or service is not distinct, the good or service is combined with other promised goods or services until a bundle of goods or services is identified that is distinct.

The transaction price is the amount of consideration to which an entity expects to be entitled in exchange for transferring promised goods or services to a customer, excluding amounts collected on behalf of third parties (for example, some sales taxes). The consideration promised in a contract with a customer may include fixed amounts, variable amounts, or both. When determining the transaction price, an entity must consider the effects of all of the following:

●

variable consideration;

●

constraining estimates of variable consideration;

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the existence of a significant financing component in the contract;

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noncash consideration; and

●

consideration payable to a customer.

Variable consideration is included in the transaction price only to the extent that it is probable that a significant reversal in the amount of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is subsequently resolved.

The transaction price is allocated to each performance obligation on a relative standalone selling price basis. The transaction price allocated to each performance obligation is recognized when that performance obligation is satisfied, at a point in time or over time as appropriate.

Revenue for a sales-based or usage-based royalty promised in exchange for a license of intellectual property is recognized only when (or as) the later of the following events occurs:

the subsequent sale or usage occurs; and

the performance obligation to which some or all of the sales-based or usage-based royalty has been allocated has been satisfied (or partially satisfied).

Incremental contract costs are expensed when incurred when the amortization period of the asset that would have been recognized is one year or less; otherwise, incremental contract costs are recognized as an asset and amortized over time as services are provided to a customer.

Income Taxes

The Company records income taxes using the asset and liability method. Deferred income tax assets and liabilities are recognized for the future tax effects attributable to temporary differences between the financial statement carrying amounts of existing assets and liabilities and their respective income tax bases, and operating loss and tax credit carryforwards. The Company establishes a valuation allowance if management believes it is more likely than not that the deferred tax assets will not be recovered based on an evaluation of objective verifiable evidence. For tax positions that are more likely than not to be sustained upon audit, the Company recognizes the largest amount with a greater than 50% likelihood of being realized. The Company does not recognize any portion of the benefit for tax positions that are not more likely than not to be sustained upon audit. As of March 31, 2024 and December 31, 2023, the Company determined, based upon available evidence, that it is more likely than not that the net deferred tax asset will not be realized and, accordingly, has provided a full valuation allowance against its net deferred tax asset.

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Checkpoint Therapeutics, Inc.

Notes to Condensed Financial Statements

(Unaudited)

Net Loss per Share

Net loss per share is computed by dividing net loss by the weighted average number of common shares outstanding during the period. Diluted net loss per share does not reflect the effect of shares of common stock to be issued upon the exercise of stock options and warrants, as their inclusion would be anti-dilutive. The following table summarizes potentially dilutive securities outstanding at March 31, 2024 and 2023 that were excluded from the computation of diluted net loss per share, as they would be anti-dilutive:


	March 31,
	2024	2023
Warrants (Note 6)	42,139,278	6,516,211
Stock options (Note 6)	127,000	27,000
Unvested restricted stock awards (Note 6)	3,742,676	1,251,072
Unvested restricted stock units (Note 6)	598,246	619,884
Total	46,607,200	8,414,167

Comprehensive Loss

The Company has no components of comprehensive loss other than net loss. Thus, comprehensive loss is the same as net loss for the periods presented.

Recently Issued Accounting Pronouncements

During the three-month period ended March 31, 2024, there were no new accounting pronouncements or updates to recently issued accounting pronouncements as disclosed in the Company’s Form 10-K for the year ended December 31, 2023 that affect the Company’s present or future results of operations, overall financial condition, liquidity or disclosures.

Note 3 – License Agreements

Dana-Farber Cancer Institute

In March 2015, the Company entered into an exclusive license agreement with Dana-Farber Cancer Institute (“Dana Farber”) to develop a portfolio of fully human immuno-oncology targeted antibodies targeting PD-L1, Glucocorticoid-induced TNFR-related protein (“GITR”) and Carbonic anhydrase IX (“CAIX”). Dana-Farber is eligible to receive payments of up to an aggregate of approximately $21.5 million for each licensed product upon the Company’s successful achievement of certain clinical development, regulatory and first commercial sale milestones, of which $5.0 million of these milestones have been expensed for the antibody targeting PD-L1. In addition, Dana-Farber is eligible to receive up to an aggregate of $60.0 million upon the Company’s successful achievement of certain sales milestones based on aggregate net sales, in addition to royalty payments based on a tiered low to mid-single digit percentage of net sales. Dana-Farber also receives an annual license maintenance fee of $50,000, which is creditable against future milestone payments or royalties.

In connection with the license agreement with Dana-Farber, the Company entered into a collaboration agreement with TG Therapeutics, Inc. (“TGTX”) to develop and commercialize the anti-PD-L1 and anti-GITR antibody research programs in the field of hematological malignancies, while the Company retained the right to develop and commercialize these antibodies in solid tumors. Michael Weiss, Chairman of the Board of Directors of Checkpoint and Fortress’ Executive Vice Chairman, Strategic Development, is also the Executive Chairman, President and Chief Executive Officer and a stockholder of TGTX. Effective September 30, 2023, the Company and TGTX agreed to mutually terminate the collaboration agreement. For the three months ended March 31, 2023, the Company recognized approximately $29,000 in revenue related to the collaboration agreement in the Condensed Statements of Operations.

Adimab, LLC

In October 2015, Fortress entered into a collaboration agreement with Adimab, LLC (“Adimab”) to discover and optimize antibodies using their proprietary core technology platform. Under this agreement, Adimab optimized cosibelimab, the Company’s anti-PD-L1 antibody which it originally licensed from Dana-Farber. In January 2019, Fortress transferred the rights to the optimized antibody to the

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Checkpoint Therapeutics, Inc.

Notes to Condensed Financial Statements

(Unaudited)

Company, and Checkpoint entered into a collaboration agreement directly with Adimab on the same day. Under the terms of the agreement, Adimab is eligible to receive additional payments from the Company of up to an aggregate of approximately $2.5 million upon various filings for regulatory approvals to commercialize the product. In addition, Adimab is eligible to receive royalty payments based on a tiered low single digit percentage of net sales.

In February 2023 the Company expensed a non-refundable milestone payment of $2.2 million to research and development expenses upon the United States Food and Drug Administration’s filing acceptance of the Company’s Biologics License Application (“BLA”) for cosibelimab in metastatic or locally advanced cutaneous squamous cell carcinoma.

NeuPharma, Inc.

In March 2015, Fortress entered into an exclusive license agreement with NeuPharma, Inc. (“NeuPharma”) to develop and commercialize novel irreversible, 3rd generation EGFR inhibitors, including olafertinib, on a worldwide basis other than certain Asian countries. On the same date, Fortress assigned all of its right and interest in the EGFR inhibitors to the Company. NeuPharma is eligible to receive additional payments of up to an aggregate of approximately $39.0 million upon the Company’s successful achievement of certain clinical development and regulatory milestones covering up to three indications, of which $22.5 million are due upon various regulatory approvals to commercialize the products. In addition, NeuPharma is eligible to receive payments of up to an aggregate of $40.0 million upon the Company’s successful achievement of certain sales milestones based on aggregate net sales across all indications, in addition to royalty payments based on a tiered mid to high-single digit percentage of net sales.

Jubilant Biosys Limited

In May 2016, the Company entered into a license agreement with Jubilant Biosys Limited (“Jubilant”), whereby the Company obtained an exclusive, worldwide license to Jubilant’s family of patents covering compounds that inhibit BET proteins such as BRD4, including CK-103. Jubilant is eligible to receive payments up to an aggregate of approximately $88.4 million upon the Company’s successful achievement of certain clinical development and regulatory milestones, of which $59.5 million are due upon various regulatory approvals to commercialize the products. In addition, Jubilant is eligible to receive payments up to an aggregate of $89.3 million upon the Company’s successful achievement of certain sales milestones based on aggregate net sales, in addition to royalty payments based on a tiered low to mid-single digit percentage of net sales.

In connection with the license agreement with Jubilant, the Company entered into a sublicense agreement with TGTX, a related party, to develop and commercialize the compounds licensed in the field of hematological malignancies, while the Company retained the right to develop and commercialize these compounds in the field of solid tumors. Effective September 30, 2023, the Company and TGTX agreed to mutually terminate the sublicense agreement. For the three months ended March 31, 2023, the Company recognized approximately $6,000 in revenue related to the sublicense agreement in the Condensed Statements of Operations.

The collaborations with TGTX each contained single material performance obligations under Topic 606, which was the granting of a license that is functional intellectual property. The Company’s performance obligations were satisfied at the point in time when TGTX had the ability to use and benefit from the right to use the intellectual property. The performance obligations of the original agreements were satisfied prior to the adoption of Topic 606. The performance obligation of the amendment to the collaboration agreement was satisfied in June 2019.

Note 4 – Related Party Agreements

Founders Agreement and Management Services Agreement with Fortress

Effective March 17, 2015, the Company entered into a Founders Agreement with Fortress, which was amended in July 2016 and October 2017. The Founders Agreement provides, that in exchange for the time and capital expended in the formation of Checkpoint and the identification of specific assets the acquisition of which resulted in the formation of a viable emerging growth life science company, the Company shall: (i) issue annually to Fortress, on January 1 of each year, shares of common stock equal to two and one-half percent (2.5%) of the fully diluted outstanding equity of Checkpoint at the time of issuance; (ii) pay an equity fee in shares of common stock, payable within five (5) business days of the closing of any equity or debt financing for Checkpoint or any of its respective subsidiaries that occurs after the effective date of the Founders Agreement and ending on the date when Fortress no longer has majority voting

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Checkpoint Therapeutics, Inc.

Notes to Condensed Financial Statements

(Unaudited)

control in Checkpoint’s voting equity, equal to two and one-half percent (2.5%) of the gross amount of any such equity or debt financing; and (iii) pay a cash fee equal to four and one half percent (4.5%) of Checkpoint’s annual net sales, payable on an annual basis, within ninety (90) days of the end of each calendar year. In the event of a change in control (as it is defined in the Founders Agreement), Checkpoint will pay a one-time change in control fee equal to five times (5x) the product of (i) monthly net sales for the twelve (12) months immediately preceding the change in control and (ii) four and one-half percent (4.5%). The Founders Agreement has a term of fifteen years, after which it automatically renews for one-year periods unless Fortress gives the Company notice of termination. The Founders Agreement will also automatically terminate upon a change of control.

Effective March 17, 2015, the Company entered into a Management Services Agreement (the “MSA”) with Fortress. Pursuant to the terms of the MSA, for a period of five (5) years, Fortress will render advisory and consulting services to the Company. Services provided under the MSA may include, without limitation, (i) advice and assistance concerning any and all aspects of Checkpoint’s operations, clinical trials, financial planning and strategic transactions and financings and (ii) conducting relations on behalf of the Company with accountants, attorneys, financial advisors and other professionals (collectively, the “Services”). The Company is obligated to utilize clinical research services, medical education, communication and marketing services and investor relations/public relation services of companies or individuals designated by Fortress, provided those services are offered at market prices. However, the Company is not obligated to take or act upon any advice rendered from Fortress and Fortress shall not be liable for any of the Company’s actions or inactions based upon their advice. Fortress and its affiliates, including all members of its Board of Directors, have been contractually exempt from fiduciary duties to the Company relating to corporate opportunities. In consideration for the Services, the Company will pay Fortress an annual consulting fee of $0.5 million (the “Annual Consulting Fee”), payable in advance in equal quarterly installments on the first business day of each calendar quarter in each year, provided, however, that such Annual Consulting Fee shall be increased to $1.0 million for each calendar year in which the Company has net assets in excess of $100 million at the beginning of the calendar year. The MSA shall be automatically extended for additional five-year periods unless Fortress or the Company provides notice to the other party of its desire not to automatically extend the term. For each of the three months ended March 31, 2024 and 2023, the Company recognized $125,000 in expense in the Condensed Statements of Operations related to the MSA.

Caribe BioAdvisors, LLC

In December 2016, the Company entered into an advisory agreement effective January 1, 2017 with Caribe BioAdvisors, LLC (“Caribe”), owned by Michael Weiss, to provide the advisory services of Mr. Weiss as Chairman of the Board. Pursuant to the agreement, Caribe will be paid an annual cash fee of $60,000, in addition to any and all annual equity incentive grants paid to members of the board. In June 2023, Mr. Weiss assigned the agreement to Hawkins BioVentures, LLC. For each of the three months ended March 31, 2024 and 2023, the Company recognized approximately $27,000 in expense in the Condensed Statements of Operations related to the advisory agreement, including approximately $12,000 in expense related to annual equity incentive grants.

Note 5 – Commitments and Contingencies

Leases

The Company is not a party to any leases for office space or equipment.

License Agreements

The Company has undertaken to make contingent milestone payments to the licensors of its portfolio of product candidates. In addition, the Company would pay royalties to such licensors based on a percentage of net sales of each product candidate following regulatory marketing approval (See Note 3).

Litigation

The Company recognizes a liability for a contingency when it is probable that liability has been incurred and when the amount of loss can be reasonably estimated. When a range of probable loss can be estimated, the Company accrues the most likely amount of such loss, and if such amount is not determinable, then the Company accrues the minimum of the range of probable loss. The Company expenses legal costs as they are incurred.

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Checkpoint Therapeutics, Inc.

Notes to Condensed Financial Statements

(Unaudited)

The Company and certain of its executive officers have been named as defendants in a consolidated putative stockholder class action lawsuit pending in the United States District Court for the Southern District of New York. The action is styled Moore v. Checkpoint Therapeutics, Inc., et al., No. 1:24-cv-02613-PAE (the “Securities Class Action”). The Complaint in the Securities Class Action (the “Complaint”), which was filed on April 5, 2024, alleges that defendants violated the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and SEC Rule 10b-5 promulgated thereunder by making false and misleading statements and omissions, and the Complaint alleges that the executive officers named as defendants are control persons under Section 20(a) of the Exchange Act. The Complaint was filed on behalf of stockholders who purchased shares of the Company’s common stock between March 10, 2021 and December 15, 2023, and the Complaint seeks, among other things, monetary damages on behalf of the purported class.

The Company has been named as a nominal defendant and certain of its current and former directors and executive officers have been named as defendants in a derivative lawsuit pending in the United States District Court for the Southern District of New York. The action is styled Geary v. Oliviero, et al., No. 1:24-cv-03471 (the “Derivative Action”). The Complaint in the Derivative Action, which was filed on May 6, 2024, asserts claims against all defendants under Delaware law for, among other things, breach of fiduciary duty, claims against all defendants under Section 14(a) of the Exchange Act, and claims for contribution under the federal securities laws against certain of the defendants.

The Company is reviewing the Complaint and Derivative Action and has not yet formally responded to them but believes that both allegations are without merit and intends to defend itself and its directors and executive officers vigorously. There is no assurance, however, that the Company or the other defendants will be successful in their defense of either of these allegations or that the Company’s insurance policy coverage will be available or adequate to fund any settlement or judgment or the litigation costs of these actions. Moreover, the Company is unable to predict the outcome or reasonably estimate a range of possible losses at this time.

Note 6 – Stockholders’ Equity

Common Stock

At the Company’s 2023 Annual Meeting of Stockholders held on June 12, 2023, its stockholders approved an amendment to its certificate of incorporation to increase the number of authorized shares of common stock available to issue by 30,000,000 to 80,000,000 with a par value of $0.0001 per share, of which 700,000 shares are designated as “Class A common stock.” The amendment was filed with the Secretary of State of the State of Delaware on June 14, 2023.

As of March 31, 2024 and December 31, 2023, there were 700,000 shares of Class A common stock issued and outstanding to Fortress. The holders of common stock are entitled to one vote per share of common stock held. The Class A common stockholders are entitled to a number of votes per share equal to 1.1 times a fraction, the numerator of which is the sum of the shares of outstanding common stock and the denominator of which is the number of shares of Class A common stock. Accordingly, the holder of shares of Class A common stock will be able to control or significantly influence all matters requiring approval by our stockholders, including the election of directors and the approval of mergers or other business combination transactions. Each share of Class A common stock is convertible, at the option of the holder thereof, into one (1) fully paid and non-assessable share of common stock subject to adjustment for stock splits and combinations.

Registered Direct Offerings

In November 2020, the Company filed a shelf registration statement on Form S-3 (the “November 2020 Form S-3”), which was declared effective in December 2020 (File No. 333-251005). Under the November 2020 Form S-3, the Company may sell up to a total of $100 million of its securities.

In February 2023, the Company closed on the February 2023 Registered Direct Offering for the issuance and sale of an aggregate of 1,180,000 shares of its common stock at a purchase price of $5.25 per share of common stock. In addition, the offering includes 248,572 shares of common stock in the form of pre-funded warrants at a price of $5.2499. The pre-funded warrants were funded in full at closing except for a nominal exercise price of $0.0001, are exercisable commencing on the closing date and will terminate when such pre-funded warrants are exercised in full. In a concurrent private placement, Checkpoint issued and sold Series A warrants to purchase up to 1,428,572 shares of common stock and Series B warrants to purchase up to 1,428,572 shares of common stock (collectively, the “February 2023 Common Stock Warrants”). The Series A and B warrants are exercisable immediately upon issuance with an exercise

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Checkpoint Therapeutics, Inc.

Notes to Condensed Financial Statements

(Unaudited)

price of $5.00 per share. The Series A warrants will expire five years following the issuance date and the Series B warrants will expire eighteen months following the issuance date. The Company also issued the placement agent warrants to purchase up to 85,714 shares of common stock with an exercise price of $6.5625 per share. The total gross proceeds from the February 2023 Registered Direct Offering were approximately $7.5 million with net proceeds of approximately $6.7 million after deducting approximately $0.8 million in commissions and other transaction costs. The shares of common stock and the shares underlying the pre-funded warrants were registered for sale under the November 2020 S-3. In March 2023, the Company filed a registration statement on Form S-3 to register the February 2023 Common Stock Warrants and placement agent warrants, which was declared effective May 5, 2023 (File No. 333-270474). In February 2023, the pre-funded warrants from the February 2023 Registered Direct Offering were fully exercised. The February 2023 Common Stock Warrants and placement agent warrants met the criteria for equity classification.

In April 2023, the Company closed on the April 2023 Registered Direct Offering for the issuance and sale of an aggregate of 1,700,000 shares of its common stock at a purchase price of $3.60 per share of common stock. In a concurrent private placement, Checkpoint issued and sold Series A warrants to purchase up to 1,700,000 shares of common stock and Series B warrants to purchase up to 1,700,000 shares of common stock (collectively, the “April 2023 Common Stock Warrants”). The Series A and B warrants are exercisable immediately upon issuance with an exercise price of $3.35 per share. The Series A warrants will expire five years following the issuance date and the Series B warrants will expire eighteen months following the issuance date. The Company also issued the placement agent warrants to purchase up to 102,000 shares of common stock with an exercise price of $4.50 per share. The total gross proceeds from the April 2023 Registered Direct Offering were approximately $6.1 million with net proceeds of approximately $5.5 million after deducting approximately $0.6 million in commissions and other transaction costs. The shares of common stock were registered for sale under the November 2020 S-3. In April 2023, the Company filed a registration statement on Form S-3 to register the April 2023 Common Stock Warrants and placement agent warrants, which was declared effective May 5, 2023 (File No. 333-271171). The April 2023 Common Stock Warrants and placement agent warrants met the criteria for equity classification.

The November 2020 Form S-3 expired in December 2023.

In March 2023, the Company filed a shelf registration statement on Form S-3 (the “March 2023 Form S-3”), which was declared effective May 5, 2023 (File No. 333-270843). Under the March 2023 Form S-3, the Company may sell up to a total of $150 million of its securities.

In May 2023, the Company closed on the May 2023 Registered Direct Offering for the issuance and sale of an aggregate of 1,650,000 shares of its common stock at a purchase price of $3.071 per share of common stock. In addition, the offering includes 1,606,269 shares of common stock in the form of pre-funded warrants at a price of $3.0709. The pre-funded warrants were funded in full at closing except for a nominal exercise price of $0.0001, are exercisable commencing on the closing date and will terminate when such pre-funded warrants are exercised in full. The common stock and the pre-funded warrants were sold together with Series A warrants to purchase up to 3,256,269 shares of common stock and Series B warrants to purchase up to 3,256,269 shares of common stock (collectively, the “May 2023 Common Stock Warrants”). The Series A and B warrants are exercisable immediately upon issuance with an exercise price of $2.821 per share. The Series A warrants will expire five years following the issuance date and the Series B warrants will expire eighteen months following the issuance date. The Company also issued the placement agent warrants to purchase up to 195,376 shares of common stock with an exercise price of $3.8388 per share. The total gross proceeds from the May 2023 Registered Direct Offering were approximately $10.0 million with net proceeds of approximately $9.1 million after deducting approximately $0.9 million in commissions and other transaction costs. The shares of common stock and the shares underlying the pre-funded warrants, May 2023 Common Stock Warrants, and placement agent warrants were registered for sale under the March 2023 S-3. In August 2023, the pre-funded warrants from the May 2023 Registered Direct Offering were fully exercised. The May 2023 Common Stock Warrants and placement agent warrants met the criteria for equity classification.

In July 2023, the Company closed on the July 2023 Registered Direct Offering for the issuance and sale of an aggregate of 2,427,186 shares of its common stock at a purchase price of $3.09 per share of common stock in a registered direct offering. In addition, the offering includes 809,062 shares of common stock in the form of pre-funded warrants at a price of $3.0899. The pre-funded warrants were funded in full at closing except for a nominal exercise price of $0.0001, are exercisable commencing on the closing date and will terminate when such pre-funded warrants are exercised in full. The common stock and the pre-funded warrants were sold together with Series A warrants to purchase up to 3,236,248 shares of common stock and Series B warrants to purchase up to 3,236,248 shares of common stock (collectively, the “July 2023 Common Stock Warrants”). The Series A and B warrants are exercisable immediately upon issuance with an exercise price of $2.84 per share. The Series A warrants will expire five years following the issuance date and the

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Checkpoint Therapeutics, Inc.

Notes to Condensed Financial Statements

(Unaudited)

Series B warrants will expire eighteen months following the issuance date. The Company also issued the placement agent warrants to purchase up to 194,175 shares of common stock with an exercise price of $3.8625 per share. The total gross proceeds from the July 2023 Registered Direct Offering were approximately $10.0 million with net proceeds of approximately $9.1 million after deducting approximately $0.9 million in commissions and other transaction costs. The shares of common stock and the shares underlying the pre-funded warrants, July 2023 Common Stock Warrants, and placement agent warrants were registered for sale under the March 2023 S-3. In September 2023, the pre-funded warrants from the July 2023 Registered Direct Offering were fully exercised. The July 2023 Common Stock Warrants and placement agent warrants met the criteria for equity classification.

In January 2024, the Company closed on the January 2024 Registered Direct Offering for the issuance and sale of an aggregate of 1,275,000 shares of its common stock at a purchase price of $1.805 per share of common stock. In addition, the offering includes 6,481,233 shares of common stock in the form of pre-funded warrants at a price of $1.8049. The pre-funded warrants were funded in full at closing except for a nominal exercise price of $0.0001, are exercisable commencing on the closing date and will terminate when such pre-funded warrants are exercised in full. In a concurrent private placement, Checkpoint issued and sold the January 2024 Common Stock Warrants to purchase up to 7,756,233 shares of common stock. The January 2024 Common Stock Warrants are exercisable immediately upon issuance with an exercise price of $1.68 per share and will expire five years following the issuance date. The Company also issued the placement agent warrants to purchase up to 465,374 shares of common stock with an exercise price of $2.2563 per share. The total gross proceeds from the January 2024 Registered Direct Offering were approximately $14.0 million with net proceeds of approximately $12.8 million after deducting approximately $1.2 million in commissions and other transaction costs. The shares of common stock and the shares underlying the pre-funded warrants were registered for sale under the March 2023 S-3. In March 2024, the Company filed a registration statement on Form S-3 to register the January 2024 Common Stock Warrants and placement agent warrants, which was declared effective April 5, 2024 (File No. 333-278397). As of May 7, 2024, 2,656,000 pre-funded warrants from the January 2024 Registered Direct Offering were fully exercised.

As of March 31, 2024, approximately $77.7 million of securities remain available for sale under the March 2023 Form S-3.

The Company may offer the securities under the Form S-3’s from time to time in response to market conditions or other circumstances if it believes such a plan of financing is in the best interests of its stockholders.

Warrant Inducement

In October 2023, the Company entered into the October 2023 Inducement with a certain holder of its existing warrants to exercise for cash an aggregate of 6,325,354 shares of the Company’s common stock at a reduced exercise price of $1.76 per share. The exercised warrants included warrants issued in a December 2022 registered direct offering with an original exercise price of $4.075 per share and the February Common Stock Warrants issued in the February 2023 Registered Direct Offering with an original exercise price of $5.00 per share. As part of the October 2023 Inducement, the Company agreed to issue new unregistered Series A Warrants to purchase up to 6,325,354 shares of Common Stock and new unregistered Series B Warrants to purchase up to 6,325,354 shares of Common Stock (collectively, the “October 2023 Common Stock Warrants”). The Series A and B warrants are exercisable immediately upon issuance with an exercise price of $1.51 per share. The Series A warrants will expire five years following the issuance date and the Series B warrants will expire twenty-four months following the issuance date. The Company also issued the placement agent warrants to purchase up to 379,521 shares of common stock with an exercise price of $2.20 per share. The total gross proceeds from the October 2023 Inducement were approximately $11.1 million with net proceeds of approximately $10.0 million after deducting approximately $1.1 million in commissions and other transaction costs. In November 2023, the Company filed a registration statement on Form S-3 to register the October 2023 Common Stock Warrants and placement agent warrants, which was declared effective November 24, 2023 (File No. 333-275644). The October 2023 Common Stock Warrants and placement agent warrants met the criteria for equity classification.

Upon the close of the transaction, the Company issued the holder 110,000 of the 6,325,354 shares of common stock that were issuable upon exercise of the existing warrants. Due to the beneficial ownership limitation provisions in the inducement offer letter agreement, the remaining 6,215,354 shares were initially unissued, and held in abeyance for the benefit of the holder until notice from the holder that the shares may be issued in compliance with the agreement. In January 2024, the final shares held in abeyance were issued to the holder.

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Checkpoint Therapeutics, Inc.

Notes to Condensed Financial Statements

(Unaudited)

Shares Issued Under the Founders Agreement

Pursuant to the Founders Agreement, the Company issued 368,907 shares of common stock to Fortress for the Annual Equity Fee, representing 2.5% of the fully diluted outstanding equity of Checkpoint on January 1, 2023 (see Notes 2 and 4).

Pursuant to the Founders Agreement, the Company issued to Fortress 2.5% of the aggregate number of shares of common stock issued in the February 2023 Registered Direct Offering noted above. Accordingly, the Company issued 35,714 shares of common stock to Fortress and recorded expense of approximately $156,000 related to this grant, which is included in general and administrative expenses in the Company’s Condensed Statements of Operations for the three months ended March 31, 2023.

Pursuant to the Founders Agreement, the Company issued to Fortress 2.5% of the aggregate number of shares of common stock issued in the January 2024 Registered Direct Offering. Accordingly, the Company issued 193,905 shares of common stock to Fortress and recorded expense of approximately $396,000 related to this issuance, which is included in general and administrative expenses in the Company’s Condensed Statements of Operations for the three months ended March 31, 2024.

Equity Incentive Plan

The Company has in effect the Amended and Restated 2015 Incentive Plan (“2015 Incentive Plan”). The 2015 Incentive Plan was adopted in March 2015 by our stockholders. Under the 2015 Incentive Plan, the compensation committee of the Company’s board of directors is authorized to grant stock-based awards to directors, officers, employees and consultants. An amendment to the 2015 Incentive Plan was approved by stockholders in June 2023 to increase the shares available for issuance to 6,000,000 shares. The plan expires 10 years from the effective date of the amendment and limits the term of each option to no more than 10 years from the date of grant.

As of March 31, 2024, 852,712 shares are available for issuance under the 2015 Incentive Plan.

Restricted Stock Awards

Certain employees, directors and consultants have been awarded restricted stock. The restricted stock vesting consists of milestone and time-based vesting. The following table summarizes restricted stock award activity for the three months ended March 31, 2024:


		Weighted Average
	Number of	Grant Date Fair
	Shares	Value
Non-vested at December 31, 2023	1,316,120	$	6.88
Granted	2,704,000		1.99
Forfeited	(23,894)		6.28
Vested	(253,550)		7.72
Non-vested at March 31, 2024	3,742,676	$	3.30

As of March 31, 2024, there was $4.4 million of total unrecognized compensation cost related to non-vested restricted stock, which is expected to be recognized over a weighted-average period of 1.9 years. This amount does not include, as of March 31, 2024, 1,466,733 shares of restricted stock outstanding which are performance-based and vest upon achievement of certain corporate milestones. The expense is recognized over the vesting period of the award. Stock-based compensation for milestone awards will be measured and recorded if and when it is probable that the milestone will be achieved.

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Checkpoint Therapeutics, Inc.

Notes to Condensed Financial Statements

(Unaudited)

Restricted Stock Units

The following table summarizes restricted stock units activity for the three months ended March 31, 2024:


		Weighted Average
	Number of	Grant Date Fair
	Shares	Value
Non-vested at December 31, 2023	615,884	$	2.77
Forfeited	(17,638)		2.25
Non-vested at March 31, 2024	598,246	$	2.78

As of March 31, 2024, all restricted stock units outstanding are performance-based and vest upon achievement of certain corporate milestones. The expense for milestone awards will be measured and recorded if and when it is probable that the milestone will be achieved.

Stock Options

The following table summarizes stock option award activity for the three months ended March 31, 2024:


				Weighted Average
				Remaining
		Weighted Average		Contractual Life
	Stock Options	Exercise Price		(in years)
Outstanding as of December 31, 2023	127,000	$	8.88	8.60
Outstanding as of March 31, 2024	127,000	$	8.88	8.35
Vested and exercisable as of March 31, 2024	20,250	$	24.74	5.83

Upon the exercise of stock options, the Company will issue new shares of its common stock.The Company used the Black-Scholes Model for determining the estimated fair value of stock-based compensation related to stock options.

Warrants

A summary of warrant activities for the three months ended March 31, 2024 is presented below:


				Weighted Average
				Remaining
		Weighted Average		Contractual Life
	Warrants	Exercise Price		(in years)
Outstanding as of December 31, 2023	30,097,671	$	2.36	3.00
Granted	14,702,840		0.96
Exercised	(2,661,233)		—
Outstanding as of March 31, 2024	42,139,278	$	2.02	4.07

Upon the exercise of warrants, the Company will issue new shares of its common stock.

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Checkpoint Therapeutics, Inc.

Notes to Condensed Financial Statements

(Unaudited)

Stock-Based Compensation

The following table summarizes stock-based compensation expense for the three months ended March 31, 2024 and 2023 ($ in thousands):


	For the three months ended March 31,
	2024		2023
Research and development	$	490	$	390
General and administrative		220		579
Total stock-based compensation expense	$	709	$	969

Note 7 – Common Stock Warrant Liabilities

On December 16, 2022, the Company closed on an offering for the sale of shares of its common stock and pre-funded warrants as part of a registered direct offering. The common stock and the pre-funded warrants were sold together with Series A and Series B common stock warrants. The Company also issued the placement agent warrants to purchase shares of common stock as part of the offering. After the October 2023 Inducement, only the placement agent warrants remained outstanding from this offering.

The Company accounts for warrants as either equity-classified or liability-classified instruments based on an assessment of the warrant’s specific terms and applicable authoritative guidance in ASC 480, Distinguishing Liabilities from Equity and ASC 815-40, Derivatives and Hedging - Contracts in Entity’s Own Equity. For warrants that meet all of the criteria for equity classification, the warrants are required to be recorded as a component of additional paid-in capital at the time of issuance. For warrants that do not meet all the criteria for equity classification, the warrants are required to be recorded at their initial fair value on the date of issuance, and each balance sheet date thereafter.

The Company deemed the placement agent warrants issued in December 2022 to be classified as liabilities on the balance sheet as they contain terms for redemption of the underlying security that are outside its control. The warrants were recorded at the time of closing at a fair value, determined by using the Black-Scholes Model, and will be revalued at each reporting period thereafter for as long as they remain outstanding. The Company revalued the warrants at March 31, 2024 and December 31, 2023, resulting in a fair value of approximately $125,000 for each period.


	Common Stock
	Warrant
	Liabilities
Common Stock Warrant liabilities at December 31, 2023	$	125
Change in fair value of Common Stock Warrant liabilities		—
Common Stock Warrant liabilities at March 31, 2024	$	125

The Company used the Black-Scholes Model for determining the estimated fair value of the common stock warrant liabilities. A summary of the weighted average (in aggregate) significant unobservable inputs used in measuring the warrant liability is determined using Level 3 inputs as follows:


	March 31,			December 31,
	2024			2023
Exercise price	$	5.41		$	5.41
Volatility		107.5	%		96.4	%
Expected life		3.7			4.0
Risk-free rate		4.2	%		3.8	%
Dividend yield		—			—

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Checkpoint Therapeutics, Inc.

Notes to Condensed Financial Statements

(Unaudited)

Note 8 - Accounts Payable and Accrued Expenses

At March 31, 2024 and December 31, 2023, accounts payable and accrued expenses consisted of the following ($ in thousands):


	March 31,		December 31,
	2024		2023
Accounts payable	$	11,923	$	6,570
Accrued compensation		435		1,206
Accrued Research and development		6,218		7,123
Other		583		586
Total accounts payable and accrued expenses	$	19,159	$	15,485

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Item 2. Financial Information.

Management’s Discussion and Analysis of Financial Condition and Results of Operations

Forward-Looking Statements

Statements in the following discussion and throughout this report that are not historical in nature are “forward-looking statements.” You can identify forward-looking statements by the use of words such as “expect,” “anticipate,” “estimate,” “may,” “will,” “should,” “intend,” “believe,” and similar expressions, although not all forward-looking statements contain these identifying words. Although we believe the expectations reflected in these forward-looking statements are reasonable, such statements are inherently subject to significant risks and uncertainties and we can give no assurances that our expectations will prove to be correct. Actual results could differ materially from those described in this report because of numerous factors, many of which are beyond our control. These factors include, without limitation, those described under Item 1A “Risk Factors.” We undertake no obligation to update these forward-looking statements to reflect events or circumstances after the date of this report or to reflect actual outcomes.

Overview

We are a clinical-stage immunotherapy and targeted oncology company focused on the acquisition, development and commercialization of novel treatments for patients with solid tumor cancers. We are evaluating our lead antibody product candidate, cosibelimab, an anti-programmed death-ligand 1 (“PD-L1”) antibody licensed from the Dana-Farber Cancer Institute, in an ongoing global, open-label, multicohort Phase 1 clinical trial in checkpoint therapy-naïve patients with selected recurrent or metastatic cancers, including ongoing cohorts in locally advanced and metastatic cutaneous squamous cell carcinoma (“CSCC”) intended to support one or more applications for marketing approval. Based on top-line and interim results in metastatic and locally advanced CSCC, respectively, we submitted a Biologics License Application (“BLA”) to the U.S. Food and Drug Administration (“FDA”) for these indications in January 2023. On December 15, 2023, the FDA issued a complete response letter (“CRL”) for the cosibelimab BLA for the treatment of patients with metastatic or locally advanced CSCC who are not candidates or curative surgery or radiation. The CRL only cites findings that arose during a multi-sponsor inspection of our third-party contract manufacturing organization as approvability issues to address in a resubmission. Checkpoint intends to seek to address the issues raised in the CRL in a potential BLA resubmission. In addition, we are evaluating our lead small-molecule, targeted anti-cancer agent, olafertinib, a third-generation epidermal growth factor receptor (“EGFR”) inhibitor, as a potential new treatment for patients with EGFR mutation-positive non-small cell lung cancer (“NSCLC”).

In January 2022, we announced top-line results from a registration-enabling cohort of our multi-regional, Phase 1 clinical trial of cosibelimab in patients with metastatic CSCC. The cohort met its primary endpoint, with cosibelimab demonstrating a confirmed objective response rate (“ORR”) of 47.4% (95% CI: 36.0, 59.1) based on independent central review of 78 patients enrolled in the metastatic CSCC cohort using Response Evaluation Criteria in Solid Tumors version 1.1 (“RECIST 1.1”).

In June 2022, we announced interim results from a registration-enabling cohort of our multi-regional, Phase 1 clinical trial of cosibelimab in patients with locally advanced CSCC that are not candidates for curative surgery or radiation. Cosibelimab demonstrated a confirmed ORR of 54.8% (95% CI: 36.0, 72.7) based on independent central review of 31 patients enrolled in the cohort.

In July 2023, we announced longer-term results for cosibelimab from its pivotal studies in locally advanced and metastatic CSCC. These results demonstrated a deepening of response over time, resulting in complete response rates of 26% and 13% in locally advanced and metastatic CSCC, respectively. Additionally, the confirmed ORR in metastatic CSCC increased to 50.0% based on independent central review using RECIST 1.1. Furthermore, responses continue to remain durable over time with the median duration of response not yet reached in either group. Updated safety data across 247 patients enrolled and treated with cosibelimab in all cohorts of the ongoing study remain consistent with those previously reported.

To date, we have not received approval for the sale of any product candidate in any market and, therefore, have not generated any product sales from any product candidates. In addition, we have incurred substantial operating losses since our inception, and expect to continue to incur significant operating losses for the foreseeable future and may never become profitable. As of March 31, 2024, we have an accumulated deficit of $325.3 million.

We are a majority-controlled subsidiary of Fortress.

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Checkpoint Therapeutics, Inc. was incorporated in Delaware on November 10, 2014 and commenced principal operations in March 2015. Our executive offices are located at 95 Sawyer Road, Suite 110, Waltham, MA 02453. Our telephone number is (781) 652-4500 and our email address is ir@checkpointtx.com.

Critical Accounting Policies and Use of Estimates

Our discussion and analysis of our financial condition and results of operations are based on our financial statements, which have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”). The preparation of these financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses and the disclosure of contingent assets and liabilities in our financial statements. We evaluate our estimates and judgments on an ongoing basis, including, but not limited to, those related to research and development expenses, accrued research and development expenses and stock-based compensation. We base our estimates on historical experience, known trends and events and various other factors that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.

For a discussion of our critical accounting estimates, see the MD&A in the 2023 Form 10-K. There were no material changes in our critical accounting estimates or accounting policies from December 31, 2023.

Accounting Pronouncements

During the three-month period ended March 31, 2024, there were no new accounting pronouncements or updates to recently issued accounting pronouncements disclosed in the 2023 Form 10-K that are expected to materially affect the Company’s present or future financial statements.

Results of Operations

Comparison of the Three Months Ended March 31, 2024 and 2023

Revenue

For the three months ended March 31, 2024, we recognized no revenue due to the September 30, 2023 termination of our collaborations with TG Therapeutics, Inc. (“TGTX”). For the three months ended March 31, 2023, revenue was approximately $35,000. The prior period revenue consisted of patent fees related to our collaborations with TGTX.

Research and Development Expenses

Research and development expenses primarily consist of personnel related expenses, including salaries, benefits, travel, and other related expenses, stock-based compensation, payments made to third parties for license and milestone costs related to in-licensed products and technology, payments made to third party CROs for preclinical and clinical studies, investigative sites for clinical trials, consultants, the cost of acquiring and manufacturing clinical trial materials, costs associated with regulatory filings and patents, laboratory costs and other supplies.

For the three months ended March 31, 2024, research and development expenses were approximately $8.5 million, compared to $15.8 million for the three months ended March 31, 2023, a decrease of $7.3 million. The current period research and development expenses primarily consisted of $4.4 million related to commercial manufacturing costs and inventory build, which is expensed prior to approval, to support a potential launch of cosibelimab, $1.3 million related to clinical costs for the CK-301-101 study, $1.5 million related to salary expenses, and $0.5 million related to stock compensation expense. The prior period research and development expenses primarily consisted of $5.7 million related to manufacturing costs for cosibelimab for commercial manufacturing preparation and inventory build, $3.4 million related to regulatory expenses, including $3.2 million for the PDUFA fee to the FDA for the BLA filing for cosibelimab, $2.3 million in license fees due upon the FDA filing acceptance of the BLA for cosibelimab, $2.1 million related to clinical costs for cosibelimab, $1.3 million related to salary expenses, and $0.4 million related to stock compensation expense.

We anticipate our research and development expenses will decrease for the remainder of 2024 due to decreased manufacture of cosibelimab drug substance and decreased clinical costs for our product candidates.

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General and Administrative Expenses

General and administrative expenses consist primarily of salaries and related expenses, including stock-based compensation, for executives and other administrative personnel, recruitment expenses, professional fees and other corporate expenses, including investor relations, legal activities, marketing and facilities-related expenses.

For the three months ended March 31, 2024, general and administrative expenses were approximately $2.5 million, compared to $2.3 million for the three months ended March 31, 2023, an increase of $0.2 million. The current period general and administrative expenses primarily consisted of stock compensation expense of $0.2 million, $0.4 million related to salary expenses, $0.6 million related to legal and accounting fees, $0.1 million related to investor relation fees, $0.1 million related to marketing costs, and $0.4 million related to our issuance of shares to Fortress pursuant to the Founders Agreement in connection with the sale of shares of our common stock. The prior period general and administrative expenses primarily consisted of stock compensation expense of $0.6 million, $0.4 million related to salary expenses, $0.5 million related to legal and accounting fees, $0.1 million related to investor relation fees, and $0.2 million related to our issuance of shares to Fortress pursuant to the Founders Agreement in connection with the sale of shares of our common stock.

We anticipate our general and administrative expenses will remain relatively consistent for the remainder of 2024.

Other Income

For the three months ended March 31, 2024, interest income was approximately $4,000 compared to approximately $43,000 for the three months ended March 31, 2023, a decrease of approximately $39,000. The decrease was primarily due to our cash balances between the periods.

For the three months ended March 31, 2024, there was no change in the value of common stock warrant liabilities compared to December 31, 2023. For the three months ended March 31, 2023, the gain on common stock warrant liabilities was approximately $7.6 million. The gain on common stock warrant liabilities is comprised of the fair value remeasurement of the common stock warrant liabilities on March 31, 2023 associated with the registered direct offering we completed in December 2022. We account for warrants as either equity-classified or liability-classified instruments based on an assessment of the warrant’s specific terms and applicable authoritative guidance in ASC 480 and ASC 815. The assessment considers whether the warrants are freestanding financial instruments pursuant to ASC 480, meet the definition of a liability pursuant to ASC 480, and whether the warrants meet all of the requirements for equity classification under ASC 815, including whether the warrants are indexed to the Company’s own common stock, among other conditions for equity classification. This assessment, which requires the use of professional judgment, is conducted at the time of warrant issuance and as of each subsequent quarterly period end date while the warrants are outstanding.

For the three months ended March 31, 2024, foreign currency exchange loss was approximately $1,000, which is comprised of the currency fluctuation when purchasing goods and services in another currency relative to the United States dollar.

Liquidity and Capital Resources

We have incurred substantial operating losses since our inception and expect to continue to incur significant operating losses for the foreseeable future and may never become profitable. As of March 31, 2024, we had an accumulated deficit of $325.3 million.

In February 2023, we closed on a registered direct offering (the “February 2023 Registered Direct Offering”) for the issuance and sale of an aggregate of 1,428,572 shares of our common stock at a purchase price of $5.25 per share. In addition, the offering included 248,572 shares of common stock in the form of pre-funded warrants at a price of $5.2499. In a concurrent private placement, we issued and sold Series A warrants to purchase up to 1,428,572 shares of common stock and Series B warrants to purchase up to 1,428,572 shares of common stock. The Series A and B warrants are exercisable immediately upon issuance with an exercise price of $5.00 per share. The Series A warrants will expire five years following the issuance date and the Series B warrants will expire eighteen months following the issuance date. The total gross proceeds from the offering were approximately $7.5 million with net proceeds of approximately $6.7 million after deducting approximately $0.8 million in commissions and other transaction costs. In February 2023, the pre-funded warrants from the February 2023 Registered Direct Offering were fully exercised. In October 2023, the Series A and Series B warrants from the February 2023 Registered Direct Offering were fully exercised at a reduced exercise price of $1.76 per share as part of the October 2023 inducement offer letter agreement (see below).

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In April 2023, we closed on a registered direct offering (the “April 2023 Registered Direct Offering”) for the issuance and sale of an aggregate of 1,700,000 shares of our common stock at a purchase price of $3.60 per share. In a concurrent private placement, we issued and sold Series A warrants to purchase up to 1,700,000 shares of common stock and Series B warrants to purchase up to 1,700,000 shares of common stock. The Series A and B warrants are exercisable immediately upon issuance with an exercise price of $3.35 per share. The Series A warrants will expire five years following the issuance date and the Series B warrants will expire eighteen months following the issuance date. The total gross proceeds from the offering were approximately $6.1 million with net proceeds of approximately $5.5 million after deducting approximately $0.6 million in commissions and other transaction costs.

In May 2023, we closed on a registered direct offering (the “May 2023 Registered Direct Offering”) for the issuance and sale of an aggregate of 1,650,000 shares of our common stock at a purchase price of $3.071 per share. In addition, the offering included 1,606,269 shares of common stock in the form of pre-funded warrants at a price of $3.0709. The common stock and the pre-funded warrants were sold together with Series A warrants to purchase up to 3,256,269 shares of common stock and Series B warrants to purchase up to 3,256,269 shares of common stock. The Series A and B warrants are exercisable immediately upon issuance with an exercise price of $2.821 per share. The Series A warrants will expire five years following the issuance date and the Series B warrants will expire eighteen months following the issuance date. The total gross proceeds from the offering were approximately $10.0 million with net proceeds of approximately $9.1 million after deducting approximately $0.9 million in commissions and other transaction costs. In August 2023, the pre-funded warrants from the May 2023 Registered Direct Offering were fully exercised.

In July 2023, we closed on a registered direct offering (the “July 2023 Registered Direct Offering”) for the issuance and sale of an aggregate of 2,427,186 shares of our common stock at a purchase price of $3.09 per share. In addition, the offering included 809,062 shares of common stock in the form of pre-funded warrants at a price of $3.0899. The common stock and the pre-funded warrants were sold together with Series A warrants to purchase up to 3,236,248 shares of common stock and Series B warrants to purchase up to 3,236,248 shares of common stock. The Series A and B warrants are exercisable immediately upon issuance with an exercise price of $2.84 per share. The Series A warrants will expire five years following the issuance date and the Series B warrants will expire eighteen months following the issuance date. The total gross proceeds from the offering were approximately $10.0 million with net proceeds of approximately $9.1 million after deducting approximately $0.9 million in commissions and other transaction costs. In September 2023, the pre-funded warrants from the July 2023 Registered Direct Offering were fully exercised.

In October 2023, we entered into an inducement offer letter agreement (the “October 2023 Inducement”) with a certain holder of our existing warrants to exercise for cash an aggregate of 6,325,354 shares of our common stock at a reduced exercise price of $1.76 per share. The warrants were issued to the holder on December 16, 2022 with an exercise price of $4.075 per share and on February 22, 2023 with an exercise price of $5.00 per share as part of registered direct offerings. As part of the inducement, we agreed to issue new unregistered Series A warrants to purchase up to 6,325,354 shares of Common Stock and new unregistered Series B warrants to purchase up to 6,325,354 shares of Common Stock (collectively, the “October 2023 Common Stock Warrants”). The Series A and B warrants are exercisable immediately upon issuance with an exercise price of $1.51 per share. The Series A warrants will expire five years following the issuance date and the Series B warrants will expire twenty-four months following the issuance date. The total gross proceeds from the exercise were approximately $11.1 million with net proceeds of approximately $10.0 million after deducting approximately $1.1 million in commissions and other transaction costs. Upon the close of the transaction, we issued the holder 110,000 of the 6,325,354 shares of common stock that were issuable upon exercise of the existing warrants. Due to the beneficial ownership limitation provisions in the inducement offer letter agreement, the remaining 6,215,354 shares were initially unissued, and held in abeyance for the benefit of the holder until notice from the holder that the shares may be issued in compliance with the agreement. In January 2024, the final shares held in abeyance were issued to the holder.

In January 2024, we closed on a registered direct offering (the “January 2024 Registered Direct Offering”) for the issuance and sale of an aggregate of 1,275,000 shares of our common stock at a purchase price of $1.805 per share of common stock. In addition, the offering included 6,481,233 shares of common stock in the form of pre-funded warrants at a price of $1.8049. The common stock and the pre-funded warrants were sold together with common warrants (the “January 2024 Common Stock Warrants”) to purchase up to 7,756,233 shares of common stock. The January 2024 Common Stock Warrants are exercisable immediately upon issuance with an exercise price of $1.68 per share and will expire five years following the issuance date. The total gross proceeds from the January 2024 Registered Direct Offering were approximately $14.0 million with net proceeds of approximately $12.8 million after deducting approximately $1.2 million in commissions and other transaction costs. As of May 7, 2024, 2,656,000 pre-funded warrants from the January 2024 Registered Direct Offering were fully exercised.

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Our major sources of cash have been proceeds from the sale of equity securities. We expect to use these proceeds primarily for general corporate purposes, which may include financing our growth, developing new or existing product candidates, and funding capital expenditures, acquisitions and investments.

We believe that our cash and cash equivalents are only sufficient to fund our operating expenses into the third quarter of 2024, assuming no exercises of outstanding cash warrants. We will need to secure additional funds through equity or debt offerings, or other potential sources such as partnerships to fully develop and commercialize, if approved, our product candidates. Our estimate as to how long we expect our existing cash to be able to continue to fund our operations is based on assumptions that may prove to be wrong, and we could use our available capital resources sooner than we currently expect. Further, changing circumstances, some of which may be beyond our control, could cause us to consume capital faster than we currently anticipate, and we may need to seek additional funds sooner than planned. We cannot be certain that additional funding will be available on acceptable terms, or at all. These factors individually and collectively raise substantial doubt about our ability to continue as a going concern.

Cash Flows for the Three Months Ended March 31, 2024 and 2023

Operating Activities

Net cash used in operating activities was approximately $6.5 million for the three months ended March 31, 2024, compared to approximately $14.0 million for the three months ended March 31, 2023. The decrease in net cash used in operating activities was primarily related to a reduction in manufacturing, regulatory and licensing fees for cosibelimab in the current period.

Investing Activities

There were no investing activities for the three months ended March 31, 2024 and 2023.

Financing Activities

Net cash provided by financing activities was $12.8 million for the three months ended March 31, 2024, compared to $6.8 million for the three months ended March 31, 2023. Cash provided by financing activities in the current period was related to the net proceeds from the issuance of common shares as part of our January 2024 Registered Direct Offering. The prior period amount was related to the net proceeds from the issuance of common shares as part of our February 2023 Registered Direct Offering.

Item 3. Quantitative and Qualitative Disclosures about Market Risk

We are a smaller reporting company as defined by Rule 12b-2 of the Exchange Act and are not required to provide the information otherwise required under this item.

Item 4. Controls and Procedures

Disclosure Controls and Procedures

We maintain “disclosure controls and procedures,” as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, that are designed to ensure that information required to be disclosed by us in reports that we file or submit under the Exchange Act is recorded, processed, summarized, and reported within the time periods specified in Securities and Exchange Commission rules and forms, and that such information is accumulated and communicated to our management, including our Chief Executive Officer and our Chief Financial Officer, to allow timely decisions regarding required disclosure.

The design of any disclosure controls and procedures also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions.

With respect to the quarter ended March 31, 2024, under the supervision and with the participation of our management, we conducted an evaluation of the effectiveness of the design and operations of our disclosure controls and procedures. Based upon this evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that our disclosure controls and procedures are effective. Management does not expect that our internal control over financial reporting will prevent or detect all errors and all fraud. A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the

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control systems are met. Further, the design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. Because of the inherent limitations in a cost-effective control system, no evaluation of internal control over financial reporting can provide absolute assurance that misstatements due to error or fraud will not occur or that all control issues and instances of fraud, if any, have been or will be detected.

Changes in Internal Control over Financial Reporting:

There were no changes in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) that occurred during the fiscal quarter ended March 31, 2024 which have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Part II. Other Information

Item 1. Legal Proceedings.

We and certain of our executive officers have been named as defendants in a consolidated putative stockholder class action lawsuit pending in the United States District Court for the Southern District of New York. The action is styled Moore v. Checkpoint Therapeutics, Inc., et al., No. 1:24-cv-02613-PAE (the “Securities Class Action”). The Complaint in the Securities Class Action (the “Complaint”), which was filed on April 5, 2024, alleges that defendants violated the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and SEC Rule 10b-5 promulgated thereunder by making false and misleading statements and omissions, and the Complaint alleges that the executive officers named as defendants are control persons under Section 20(a) of the Exchange Act. The Complaint was filed on behalf of stockholders who purchased shares of the Company’s common stock between March 10, 2021 and December 15, 2023, and the Complaint seeks, among other things, monetary damages on behalf of the purported class.

We have been named as a nominal defendant and certain of our current and former directors and executive officers have been named as defendants in a derivative lawsuit pending in the United States District Court for the Southern District of New York. The action is styled Geary v. Oliviero, et al., No. 1:24-cv-03471 (the “Derivative Action”). The Complaint in the Derivative Action, which was filed on May 6, 2024, asserts claims against all defendants under Delaware law for, among other things, breach of fiduciary duty, claims against all defendants under Section 14(a) of the Exchange Act, and claims for contribution under the federal securities laws against certain of the defendants.

We intend to defend ourselves and our directors and executive officers vigorously.

Item 1A. Risk Factors

The following information sets forth risk factors that could cause our actual results to differ materially from those contained in forward-looking statements we have made in this report and those we may make from time to time. You should carefully consider the risks described below, in addition to the other information contained in this report and our other public filings, before making an investment decision. Our business, financial condition or results of operations could be harmed by any of these risks. The risks and uncertainties described below are not the only ones we face. Additional risks not presently known to us or other factors not perceived by us to present significant risks to our business at this time also may impair our business operations.

Risks Related to Our Finances and Capital Requirements

We have incurred significant losses since our inception and anticipate that we will incur continued losses for the foreseeable future. We may never achieve or maintain profitability.

We have a limited operating history, and we have focused primarily on in-licensing and developing our product candidates, with the goal of supporting regulatory approval for these product candidates. We have incurred losses since our inception in November 2014 and have an accumulated deficit of $325.3 million as of March 31, 2024. We expect to continue to incur significant operating losses for the foreseeable future. We also do not anticipate that we will achieve profitability for a period of time after generating material revenues, if ever. If we are unable to generate revenues, we will not become profitable and may be unable to continue operations without continued funding. Because of the numerous risks and uncertainties associated with developing pharmaceutical products, we are unable to predict

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the timing or amount of increased expenses or when or if, we will be able to achieve profitability. Our net losses may fluctuate significantly from quarter to quarter and year to year. We anticipate that our expenses will increase substantially if:

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one or more of our product candidates are submitted for marketing approval, as is the case with cosibelimab, or are approved for commercial sale, due to our need to establish the necessary commercial infrastructure to launch this product candidate without substantial delays, including manufacturing to build pre-commercial inventory, hiring sales and marketing personnel and contracting with third parties for warehousing, distribution, cash collection and related commercial activities;

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we are required by the FDA or foreign regulatory authorities, to perform studies in addition to those currently expected;

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we initiate one or more clinical trials to pursue additional indications for our product candidates, or if there are any delays in completing our clinical trials or the development of any of our product candidates;

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we execute other collaborative, licensing or similar arrangements and the timing of payments we may make or receive under these arrangements;

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there are variations in the level of expenses related to our current and future development programs;

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there are any product liability or intellectual property infringement lawsuits in which we may become involved;

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there are any regulatory developments affecting product candidates of our competitors; and

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one or more of our product candidates receives regulatory approval.

Our ability to become profitable depends upon our ability to generate revenue. To date, we have not generated any revenue from the sale of our development stage products, and we do not know when, or if, we will generate any revenue. To obtain revenues from sales of our product candidates, we must succeed, either alone or with third parties, in developing, obtaining regulatory approval for, manufacturing and marketing products with commercial potential. Our ability to generate revenue depends on a number of factors, including, but not limited to, our ability to:

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obtain regulatory approval for one or more of our product candidates, or any future product candidate that we may license or acquire;

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manufacture commercial quantities of one or more of our product candidates or any future product candidate, if approved, at acceptable cost levels; and

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develop a commercial organization and the supporting infrastructure required to successfully market and sell one or more of our product candidates or any future product candidate, if approved.

Even if we do achieve profitability, we may not be able to sustain or increase profitability on a quarterly or annual basis. Our failure to become and remain profitable would depress the value of our company and could impair our ability to raise capital, expand our business, maintain our research and development efforts, diversify our product offerings or even continue our operations. A decline in the value of our company could also cause you to lose all or part of your investment.

We will require substantial additional funding which may not be available to us on acceptable terms, or at all. If we fail to raise the necessary additional capital, we may be unable to complete the development and commercialization of our product candidates, or continue our development programs.

Our operations have consumed substantial amounts of cash since inception. We expect to significantly increase our spending to advance the preclinical and clinical development, and resulting regulatory approval request submissions, of our product candidates and launch and commercialize any product candidates for which we may receive regulatory approval, including building a commercial organization to address certain markets. We will require additional capital for the further development and, if approved, commercialization of our product candidates, as well as to fund our other operating expenses and capital expenditures. We believe, assuming no business or corporate development transactions are consummated, and that no outstanding cash warrants are exercised, that our cash and cash equivalents are only sufficient to fund our operating expenses into the third quarter of 2024. Accordingly, we intend to continue our active discussions with third party pharmaceutical and biotechnology companies to evaluate potential partnerships or other types of corporate development transactions, including strategic mergers.

We cannot be certain that additional funding will be available on acceptable terms, or at all. If we are unable to raise additional capital in sufficient amounts or on terms acceptable to us we may have to significantly delay, scale back or discontinue the development or, if approved, commercialization of one or more of our product candidates. We may also seek collaborators for one or more of our current

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or future product candidates at an earlier stage than otherwise would be desirable or on terms that are less favorable than might otherwise be available. Any of these events could significantly harm our business, financial condition and prospects.

Our future funding requirements will depend on many factors, including, but not limited to:

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the timing, design and conduct of, and results from, preclinical studies and clinical trials for our product candidates;

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the timing and process of regulatory approval reviews and potential delays in our efforts to seek regulatory approval for our product candidates, and any costs associated with such delays;

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the costs of establishing a commercial organization to sell, market and distribute our product candidates;

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the rate of progress and costs of our efforts to prepare for the submission or resubmission of an NDA or BLA for any of our product candidates or any product candidates that we may in-license or acquire in the future, and the potential that we may need to conduct additional clinical trials to support applications for regulatory approval;

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the costs of filing, prosecuting, defending and enforcing any patent claims and other intellectual property rights associated with our product candidates, including any such costs we may be required to expend if our licensors are unwilling or unable to do so;

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the cost and timing of securing sufficient supplies of our product candidates from our third-party manufacturers for clinical trials and in preparation for commercialization;

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the effect of competing technological and market developments;

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the terms and timing of any collaborative, licensing, co-promotion or other arrangements that we may establish;

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the costs associated with litigation, adverse remedy judgments and/or settlements, including with respect to the Securities Class Action, the Derivative Action and any future actions that may be brought against the Company;

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if one or more of our product candidates are approved, the potential that we may be required to file a lawsuit to defend our patent rights or regulatory exclusivities from challenges by companies seeking to market generic versions of one or more of our product candidates; and

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the success of the commercialization of one or more of our product candidates, if approved.

Future capital requirements will also depend on the extent to which we acquire or invest in additional complementary businesses, products and technologies, but we currently have no commitments or agreements relating to any of these types of transactions.

In order to carry out our business plan and implement our strategy, we anticipate that we will need to obtain additional financing from time to time and may choose to raise additional funds through strategic collaborations, licensing arrangements, public or private equity or debt financing, bank lines of credit, asset sales, government grants, or other arrangements. We are also engaging in discussions with third party pharmaceutical and biotechnology companies to evaluate potential partnerships or other types of corporate development transactions, including a strategic merger. We cannot be sure that any additional funding, if needed, partnership or any other type of corporate development transaction, will be available on terms favorable to us or at all. Furthermore, any additional equity or equity-related financing, or equity that may be issued or sold in a corporate development transaction, may be dilutive to our stockholders, and debt or equity financing, if available, may subject us to restrictive covenants and significant interest costs. If we obtain funding through a strategic collaboration, merger, or licensing arrangement, we may be required to relinquish our rights to certain of our product candidates or marketing territories.

Our inability to raise capital when needed would harm our business, financial condition and results of operations, and could cause our stock price to decline or require that we wind down our operations altogether.

There is substantial doubt about our ability to continue as a going concern, which may hinder our ability to obtain future financing.

Our unaudited condensed financial statements as of March 31, 2024 have been prepared under the assumption that we will continue as a going concern for the next twelve months. We do not believe that our cash and cash equivalents are sufficient for the next twelve months after the date that our financial statements are issued. As a result of our financial condition and other factors described herein, there is substantial doubt about our ability to continue as a going concern. Our ability to continue as a going concern will depend on our ability to obtain additional funding, as to which no assurances can be given. We continue to analyze various alternatives, including potentially obtaining debt or equity financings or other arrangements. Our future success depends on our ability to raise capital. We cannot be certain that raising additional capital, whether through selling additional debt or equity securities or obtaining a line of credit or other loan, will be available to us or, if available, will be on terms acceptable to us. If we issue additional securities to raise funds,

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these securities may have rights, preferences, or privileges senior to those of our common stock, and our current shareholders may experience dilution. If we are unable to obtain funds when needed or on acceptable terms, we may be required to curtail our current development programs, cut operating costs, forego future development and other opportunities or even terminate our operations. Additionally, we intend to continue our active discussions with third party pharmaceutical and biotechnology companies to evaluate potential partnerships or other types of corporate development transactions, including strategic mergers.

Raising additional capital may cause dilution to our existing stockholders, restrict our operations or require us to relinquish proprietary rights.

Until such time, if ever, as we can generate substantial product revenue, we expect to finance our cash needs through a combination of equity offerings, debt financings, grants and license and development agreements in connection with any collaborations. To the extent that we raise additional capital through the sale of equity or convertible debt securities, your ownership interest will be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect your rights as a stockholder. Debt financing and preferred equity financing, if available, may involve agreements that include covenants limiting or restricting our ability to take specific actions, such as incurring additional debt, making capital expenditures or declaring dividends.

If we raise additional funds through collaborations, mergers, strategic alliances or marketing, distribution or licensing arrangements with third parties, we may have to relinquish valuable rights to our technologies, future revenue streams, research programs or product candidates or grant licenses on terms that may not be favorable to us. If we are unable to raise additional funds through equity or debt financings when needed, we may be required to delay, limit, reduce or terminate our product development or future commercialization efforts or grant rights to develop and market product candidates that we would otherwise prefer to develop and market ourselves.

We are a “smaller reporting company,” which means that the reduced disclosure requirements applicable to smaller reporting companies may make our common stock less attractive to investors.

We will remain a smaller reporting company until the fiscal year following the determination that our voting and non-voting common shares held by non-affiliates is more than $250 million measured on the last business day of our second fiscal quarter, or our annual revenues are more than $100 million during the most recently completed fiscal year and our voting and non-voting common shares held by non-affiliates is more than $700 million measured on the last business day of our second fiscal quarter. Smaller reporting companies are able to provide simplified executive compensation disclosure, are exempt from the auditor attestation requirements of Section 404, and have certain other reduced disclosure obligations, including, among other things, being required to provide only two years of audited financial statements and not being required to provide selected financial data, supplemental financial information or risk factors.

We have elected to take advantage of certain of the reduced reporting obligations. We cannot predict whether investors will find our common stock less attractive if we rely on these exemptions. If some investors find our common stock less attractive as a result, there may be a less active trading market for our common stock and our stock price may be reduced or more volatile.

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We no longer qualify as an “emerging growth company,” and as a result, we have to comply with increased disclosure and compliance requirements.

We no longer qualify as an emerging growth company (“EGC”) as defined in the Jumpstart Our Business Startups Act (the “JOBS Act”) because in 2023, we reached the five-year anniversary of the first sale of our common stock pursuant to an effective registration statement under the Securities Act of 1933. As such, we are no longer exempt from certain disclosure and compliance requirements that apply to other public companies but did not previously apply to us due to our status as an EGC. These requirements include, but are not limited to:

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compliance with any requirement that may be adopted by the PCAOB regarding mandatory audit firm rotation or a supplement to the auditor’s report providing additional information about the audit and the financial statements, including critical audit matters;

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the requirement that we provide more detailed disclosures regarding executive compensation, although we are still able to take advantage of exemptions provided to smaller reporting companies; and

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the requirement that we obtain stockholder approval of any golden parachute payments not previously approved.

We anticipate increased expenses, including exchange listing and SEC requirements, director and officer insurance premiums, legal, audit and tax fees, regulatory compliance programs, and investor relations costs associated with being a public company and ceasing to be an emerging growth company.

We may expend our limited resources to pursue certain product candidates or indications and fail to capitalize on product candidates or indications that may be more profitable or for which there is a greater likelihood of success.

Because we have limited financial and managerial resources, we focus on research programs and product candidates that we identify for specific indications. As a result, we may forego or delay pursuit of opportunities with other product candidates or for other indications that later prove to have greater commercial potential. Our resource allocation decisions may cause us to fail to capitalize on viable commercial products or profitable market opportunities. Our spending on current and future research and development programs and product candidates for specific indications may not yield any commercially viable products. If we do not accurately and/or effectively evaluate the commercial potential or target market for a particular product candidate, we may relinquish valuable rights to that product candidate through collaboration, licensing or other royalty arrangements in cases in which it would have been more advantageous for us to retain sole development and commercialization rights to such product candidate.

Weakness in the U.S. economy, including within our geographic footprint, has adversely affected us in the past and may adversely affect us in the future.

We have been, and will continue to be, impacted by general business and economic conditions in the United States. These conditions include short-term and long-term interest rates, inflation, money supply, political issues, war, legislative and regulatory changes, fluctuations in both debt and equity capital markets, broad trends in industry and finance, unemployment and the strength of the U.S. economy and the local economies in which we operate, all of which are beyond our control.

Worldwide financial markets have recently experienced periods of extraordinary disruption and volatility, which have been exacerbated by the COVID-19 pandemic, the Russia/Ukraine conflict and the evolving conflict in Israel and Gaza, resulting in heightened credit risk, reduced valuation of investments, decreased economic activity, heightened risk of cyberattacks, and inflation. Moreover, many companies have experienced reduced liquidity and uncertainty as to their ability to raise capital during such periods of market disruption and volatility. In the event that these conditions recur or result in a prolonged economic downturn, our results of operations, financial position and/or liquidity could be materially and adversely affected. In addition, as a result of recent financial and political events, we may face increased regulation.

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Risks Related to our Business Strategy, Structure, and Organization

We currently have no drug products for sale and are dependent on the future success of our product candidates. We can give no assurances that any of our product candidates will receive regulatory approval or be successfully commercialized.

To date, we have invested a significant portion of our efforts and financial resources in the acquisition and development of our product candidates. As a development-stage company, we have limited experience and have not yet demonstrated an ability to successfully overcome many of the risks and uncertainties frequently encountered by companies in new and rapidly evolving fields, particularly in the biopharmaceutical area. Our future success is substantially dependent on our ability to successfully develop, obtain regulatory approval for, and then successfully commercialize such product candidates. Our product candidates are currently in preclinical development or in clinical trials. Our business depends entirely on the successful development and commercialization of our product candidates, which may never occur. We currently have no drug products for sale, currently generate no revenues from sales of any drug products and may never be able to develop or commercialize a marketable drug.

The successful development, and any commercialization of our technologies and any product candidates that may occur, would require us to successfully perform a variety of functions, including:

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developing our technology platform;

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identifying, developing, formulating, manufacturing and commercializing product candidates;

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entering into and maintaining successful licensing and other arrangements with product development partners;

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achieving clinical endpoints to support preparation of approval applications;

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participating in regulatory approval processes, including ultimately gaining approval to market a drug product, which may not occur;

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obtaining sufficient quantities of our product candidates from our third-party manufacturers to meet clinical trial needs and, if approved, to meet commercial demand at launch and thereafter;

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establishing and maintaining agreements with wholesalers, distributors and group purchasing organizations on commercially reasonable terms;

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conducting sales and marketing activities including hiring, training, deploying and supporting a sales force and creating market demand for our product candidates through our own marketing and sales activities, and any other arrangements to promote our product candidates that we may establish;

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maintaining patent protection and regulatory exclusivity for our product candidates; and

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obtaining market acceptance for our product candidates.

Each of these requirements will require substantial time, effort and financial resources.

We intend to use data from our ongoing Phase 1 clinical trial of cosibelimab, conducted outside the United States, in checkpoint therapy-naïve patients with selected recurrent or metastatic cancers, including CSCC, to potentially support one or more U.S. BLAs and comparable applications for marketing approval outside the U.S. In January 2020, we announced that we had initial discussions with the FDA to execute this strategy in CSCC. Based on top-line and interim results in metastatic and locally advanced CSCC, respectively, we submitted a BLA to the U.S. FDA for these indications in January 2023. In December 2023, the FDA issued a complete response letter for the cosibelimab BLA due to inspection issues at the third-party contract manufacturing organization. Although no approvability issues regarding use of data from the Phase 1 clinical trial were noted in the complete response letter, upon resubmission of the BLA the FDA reserves the right to review the BLA again in its entirety.Similarly, we intend to use data from our licensor’s ongoing Phase 3 clinical trial of olafertinib (formerly CK-101), conducted only in China, in patients with EGFR mutation-positive NSCLC, to potentially support a U.S. NDA and comparable applications for marketing approval outside the U.S. We believe, based on published FDA guidance documents, public statements of companies with comparable product candidates, and past interactions with the FDA, that exclusively foreign clinical data from a single study may be acceptable to support marketing approval(s) under FDA regulations. If we prove to be incorrect, running additional studies in the U.S. will require substantial time, effort and financial resources or may not be possible at all.

Our operations have been limited to organizing our company, acquiring, developing and securing our proprietary technologies and obtaining preclinical data or clinical data for various product candidates. These operations provide a limited basis for you to assess our ability to continue to identify product candidates, develop and commercialize product candidates in our portfolio and any product

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candidates we are able to identify and enter into successful collaborative arrangements with other companies in the future, as well as for you to assess the advisability of investing in our securities.

Each of our product candidates will require additional preclinical or clinical development, management of preclinical, clinical and manufacturing activities, regulatory approval in the jurisdictions in which we plan to market the product, obtaining manufacturing supply, building of a commercial organization, and significant marketing efforts before we generate any revenues from product sales, which may not occur. We are not permitted to market or promote any of our product candidates in the U.S. or any other jurisdiction before we receive regulatory approval from the FDA or comparable foreign regulatory authority, respectively, and we may never receive such regulatory approval for any of our product candidates.

Our future growth depends on our ability to identify and acquire or in-license products and successfully integrating such acquired or in-licensed products into our existing operations.

An important part of our business strategy is to continue to develop a pipeline of product candidates by acquiring or in-licensing products, businesses or technologies that we believe are a strategic fit with our focus on novel combinations of immuno-oncology antibodies and small molecule targeted anti-cancer agents. Future in-licenses or acquisitions, however, may entail numerous operational and financial risks, including:

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exposure to unknown liabilities;

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disruption of our business and diversion of our management’s time and attention to develop acquired products or technologies;

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difficulty or inability to secure financing to fund development activities for such acquired or in-licensed technologies in the current economic environment;

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incurrence of substantial debt or dilutive issuances of securities to pay for acquisitions;

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higher than expected acquisition and integration costs;

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increased amortization expenses;

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difficulty and cost in combining the operations and personnel of any acquired businesses with our operations and personnel;

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impairment of relationships with key suppliers or customers of any acquired businesses due to changes in management and ownership; and

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inability to retain key employees of any acquired businesses.

We have limited resources to identify and execute the acquisition or in-licensing of third-party products, businesses and technologies and integrate them into our current infrastructure. In particular, we may compete with larger pharmaceutical companies and other competitors in our efforts to establish new collaborations and in-licensing opportunities. These competitors likely will have access to greater financial resources than us and may have greater expertise in identifying and evaluating new opportunities. Moreover, we may devote resources to potential acquisitions or in-licensing opportunities that are never completed, or we may fail to realize the anticipated benefits of such efforts.

Risks Inherent in Drug Development and Commercialization

Because results of preclinical studies and early clinical trials are not necessarily predictive of future results, any product candidate we advance may not have favorable results in later clinical trials or receive regulatory approval. Moreover, interim, “top-line,” and preliminary data from our clinical trials that we announce or publish may change, or the perceived product profile may be negatively impacted, as more patient data or additional endpoints (including efficacy and safety) are analyzed.

Pharmaceutical development has inherent risks. The outcome of preclinical development testing and early clinical trials may not be predictive of the outcome of later clinical trials, and interim results of a clinical trial do not necessarily predict final results. Moreover, preclinical and clinical data are often susceptible to varying interpretations and analyses, and many companies that have believed their product candidates performed satisfactorily in preclinical studies and clinical trials have nonetheless failed to obtain marketing approval of their product candidates. Once a product candidate has displayed sufficient preclinical data to warrant clinical investigation, we will be required to demonstrate through adequate and well-controlled clinical trials that our product candidates are effective with a favorable benefit-risk profile for use in populations for their target indications before we can seek regulatory approvals for their commercial sale. Many drug candidates fail in the early stages of clinical development for safety and tolerability issues or for insufficient clinical activity, despite promising preclinical results. Accordingly, no assurance can be made that a safe and effective dose can be found for these compounds or that they will ever enter into advanced clinical trials alone or in combination with other product candidates. Moreover,

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success in early clinical trials does not mean that later clinical trials will be successful because product candidates in later-stage clinical trials may fail to demonstrate sufficient safety or efficacy despite having progressed through initial clinical testing. Companies frequently experience significant setbacks in advanced clinical trials, even after earlier clinical trials have shown promising results. There is an extremely high rate of failure of pharmaceutical candidates proceeding through clinical trials.

Individually reported outcomes of patients treated in clinical trials may not be representative of the entire population of treated patients in such studies. In addition, registration trials or larger scale Phase 3 studies, which are often conducted internationally, are inherently subject to increased operational risks compared to earlier stage studies, including the risk that the results could vary on a region to region or country to country basis, which could materially adversely affect the outcome of the study or the opinion of the validity of the study results by applicable regulatory agencies.

From time to time, we may publicly disclose top-line or preliminary data from our clinical trials, which is based on a preliminary analysis of then available data, and the results and related findings and conclusions are subject to change following a more comprehensive review of the data related to the particular study or trial. We also make assumptions, estimations, calculations and conclusions as part of our analyses of such data, and we may not have received or had the opportunity to fully and carefully evaluate all data from the particular study or trial, including all endpoints and safety data. As a result, top-line or preliminary results that we report may differ from future results of the same studies, or different conclusions or considerations may qualify such results, once additional data have been received and fully evaluated. Top-line or preliminary data also remain subject to audit and verification procedures that may result in the final data being materially different from the top-line, interim, or preliminary data we previously published. When providing top-line results, we may disclose the primary endpoint of a study before all secondary endpoints have been fully analyzed. A positive primary endpoint does not translate to all, or any, secondary endpoints being met. As a result, top-line and preliminary data should be viewed with caution until the final data are available, including data from the full safety analysis and the final analysis of all endpoints.

Further, from time to time, we may also disclose interim data from our preclinical studies and clinical trials. Interim data from clinical trials that we may complete are subject to the risk that one or more of the clinical outcomes may materially change as patient enrollment continues and more patient data become available. For example, many of the results reported in our early clinical trials rely on local investigator-assessed efficacy outcomes which may be subject to greater variability or subjectivity than results assessed in a blinded, independent, centrally reviewed manner, often required of final or later phase, adequate and well-controlled registration-directed clinical trials. If the results from our registration-directed trials are different from the results found in the earlier studies, we may need to terminate or revise our clinical development plan, which could extend the time for conducting our development program and could have a material adverse effect on our business. Also, time-to-event based endpoints such as duration of response and progression-free survival have the potential to change, sometimes drastically, with longer follow-up. In addition, as patients continue on therapy, there can be no assurance given that the final safety data from studies, once fully analyzed, will be consistent with prior safety data presented, will be differentiated from other similar agents in the same class, will support continued development, or will be favorable enough to support regulatory approvals for the indications studied. Further, others, including regulatory agencies, may not accept or agree with our assumptions, estimates, calculations, conclusions or analyses or may interpret or weigh the importance of data differently, which could impact the value of the particular program, the approvability or commercialization of the particular product candidate or product and our company in general. The information we choose to publicly disclose regarding a particular study or clinical trial is based on what is typically extensive information, and regulators or others may not agree with what we determine is material or otherwise appropriate information to include in our disclosure. If the interim, top-line or preliminary data that we report differ from final results, or if others, including regulatory authorities, disagree with the conclusions reached, our ability to obtain approval for, or successfully commercialize, our product candidates may be harmed, which could harm our business, operating results, prospects or financial condition.

Delays in clinical testing could result in increased costs to us and delay our ability to generate revenue.

Although we are conducting and planning for certain clinical trials relating to our product candidates, there can be no assurance that the FDA, or any comparable foreign regulatory authority, will accept our proposed trial designs. We may experience delays in our clinical trials and we do not know whether current or planned clinical trials will begin on time, need to be redesigned, enroll patients on time or be completed on schedule, if at all. Clinical trials can be delayed for a variety of reasons, including delays related to:

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obtaining regulatory approval to commence a trial;

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reaching agreement on acceptable terms with prospective contract research organizations (“CROs”), and clinical trial sites, the terms of which can be subject to extensive negotiation and may vary significantly among different CROs and trial sites;

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obtaining institutional review board (“IRB”), or ethics committee, as applicable, approval at each site;

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recruiting a sufficient number of suitable patients to participate in a trial;

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clinical sites deviating from trial protocol or dropping out of a trial;

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having patients complete a trial or return for post-treatment follow-up;

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developing and validating companion diagnostics on a timely basis, if required;

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obtaining resolution for any clinical holds that arise from the FDA or any comparable foreign regulatory authority;

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adding new clinical trial sites; or

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availability of raw materials or manufacturing sufficient quantities of product candidate for use in clinical trials.

We could encounter delays if a clinical trial is suspended or terminated by us, by the IRBs or ethics committees of the institutions in which such trials are being conducted, by the Data Safety Monitoring Board monitoring such trial or by the FDA or other regulatory authorities. Such authorities may impose such a suspension or termination due to a number of factors, including failure to conduct the clinical trial in accordance with regulatory requirements or our clinical protocols, inspection of the clinical trial operations or trial site by the FDA or other regulatory authorities resulting in the imposition of a clinical hold, unforeseen safety issues or adverse side effects, failure to demonstrate a benefit from using a drug candidate, changes in governmental regulations or administrative actions or lack of adequate funding to continue the clinical trial.

If we experience delays in the completion of, or termination of, any clinical trial of our product candidates, the commercial prospects of our product candidates will be harmed, and our ability to generate product revenues from any of these product candidates will be delayed, or such revenues may not be generated at all. In addition, any delays in completing our clinical trials will increase our costs, slow down our product candidate development and approval process and jeopardize our ability to commence product sales and generate revenues. Any of these occurrences may harm our business, financial condition and prospects significantly. In addition, many of the factors that cause, or lead to, a delay in the commencement or completion of clinical trials may also ultimately lead to the denial of regulatory approval of our product candidates.

Difficulties in the enrollment of patients in clinical trials may prevent or delay receipt of necessary regulatory approvals.

Patient enrollment, a significant factor in the timing of clinical trials, is affected by many factors including the size and nature of the patient population, the proximity of patients to clinical sites, the eligibility criteria for the trial, the design of the clinical trial, competing clinical trials and clinicians’ and patients’ perceptions as to the potential advantages of the drug being studied in relation to other available therapies, including any new drugs that may be approved for the indications we are investigating. Furthermore, we intend to rely on CROs and clinical trial sites to ensure the proper and timely conduct of our clinical trials and we intend to have agreements governing their committed activities, however, we will have limited influence over their actual performance.

We may not be able to initiate or continue clinical trials for one or more of our product candidates if we are unable to locate and enroll a sufficient number of eligible patients to participate in these trials as required by the FDA or similar regulatory authorities outside the United States. Some of our competitors have ongoing clinical trials for product candidates that treat the same indications that we are targeting for our product candidates, and patients who would otherwise be eligible for our clinical trials may instead enroll in clinical trials of our competitors’ product candidates. Available therapies for the indications we are pursuing can also affect enrollment in our clinical trials. Patient enrollment is affected by other factors including:

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the severity of the disease under investigation;

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the eligibility criteria for the study in question;

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the perceived risks and benefits of the product candidate under study;

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the efforts to facilitate timely enrollment in clinical trials;

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the patient referral practices of physicians;

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the number of clinical trials sponsored by other companies for the same patient population;

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the ability to monitor patients adequately during and after treatment; and

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the proximity and availability of clinical trial sites for prospective patients.

Our inability to enroll a sufficient number of patients for our clinical trials would result in significant delays and could require us to abandon one or more clinical trials altogether. Enrollment delays in our clinical trials may result in increased development costs for our product candidates or future product candidates, which would cause the value of our company to decline and limit our ability to obtain additional financing.

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Russian military action in Europe may impact foreign countries in which we enrolled patients in our clinical trials.

In February 2022, Russia commenced a military invasion of Ukraine. Russia’s invasion and the ensuing response by Ukraine may prevent the FDA from auditing our five clinical sites that enrolled a total of 17 patients in these countries during its review of our BLA for cosibelimab. If we are delayed or not able to obtain regulatory approval, our business may be adversely affected.

We may not receive regulatory approval for our product candidates, or their approval may be delayed, which would have a material adverse effect on our business and financial condition.

Our product candidates and the activities associated with their development and commercialization, including their design, testing, manufacture, safety, efficacy, recordkeeping, labeling, storage, approval, advertising, promotion, sale and distribution, are subject to comprehensive regulation by the FDA, by other regulatory agencies in the United States, by the European Medicines Agency and by comparable foreign regulatory authorities outside the United States. Failure to obtain marketing approval for one or more of our product candidates or any future product candidate will prevent us from commercializing the product candidate. We have not received approval to market any of our product candidates from regulatory authorities in any jurisdiction. We have only limited experience in filing and supporting the applications necessary to gain marketing approvals and expect to rely on third-party CROs and other third-party vendors to assist us in this process. Securing marketing approval requires the submission of extensive preclinical and clinical data and supporting information to regulatory authorities for each therapeutic indication to establish the product candidate’s safety and efficacy. Securing marketing approval also requires the submission of information about the product manufacturing process to, and inspection of manufacturing facilities by, regulatory authorities. One or more of our product candidates or any future product candidate may not be effective, may be only moderately effective or may prove to have undesirable or unintended side effects, toxicities or other characteristics that may preclude our obtaining marketing approval or prevent or limit commercial use. If any of our product candidates or any future product candidate receives marketing approval, the accompanying label may limit the approved use of our drug by severity of disease, patient group, or include contraindications, interactions, or warnings, which could limit sales of the product.

The process of obtaining marketing approval, both in the United States and abroad, is expensive, may take many years if approval is obtained at all, and can vary substantially based upon a variety of factors, including the type, complexity and novelty of the product candidates involved. Changes in marketing approval policies during the development period, changes in available therapies and standards of care, changes in or the enactment of additional statutes or regulations, or changes in regulatory review for each submitted product application, may cause delays in the approval or rejection of an application. Regulatory authorities have substantial discretion in the approval process and may refuse to accept any application or may decide that our study design, including the control arm used in our study, or data are insufficient for approval and require additional preclinical studies or clinical trials. In addition, varying interpretations of the data obtained from preclinical and clinical testing could delay, limit or prevent marketing approval of a product candidate. Any marketing approval we ultimately obtain may be limited or subject to restrictions or post-approval commitments that render the approved product not commercially viable.

Under the FDA’s accelerated approval regulations, which only apply to certain drug products, the FDA may grant marketing approval for a new drug product on the basis of adequate and well-controlled clinical trials establishing that the drug product has an effect on a surrogate endpoint that is reasonably likely, based on epidemiologic, therapeutic, pathophysiologic, or other evidence, to predict clinical benefit or on the basis of an effect on a clinical endpoint other than survival or irreversible morbidity. While we may undertake development programs for one or more of our product candidates that we believe, if successful, could support a submission for marketing approval under the accelerated approval regulations, we may ultimately fail to meet the criteria to do so, which may cause delays in the approval or rejection of an application.

If we experience delays in obtaining approval or if we fail to obtain approval of one or more of our product candidates or any future product candidate, the commercial prospects for our product candidates may be harmed and our ability to generate revenue will be materially impaired.

In addition, even if we were to obtain approval, regulatory authorities may approve any of our product candidates or any future product candidate for fewer or more limited indications than we request, may not approve the price we intend to charge for our products, may grant approval contingent on the performance of costly post-marketing studies, including clinical trials, or may approve a product candidate with a label that does not include the labeling claims necessary or desirable for the successful commercialization of that product candidate. The regulatory authority may also require the label to contain warnings, contraindications, or precautions that limit the commercialization of that product. Any of these scenarios could compromise the commercial prospects for one or more of our product candidates or any future product candidate.

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If serious adverse or unacceptable side effects are identified during the development of one or more of our product candidates or any future product candidate, we may need to abandon or limit our development of some of our product candidates.

If one or more of our product candidates or any future product candidate are associated with undesirable side effects or adverse events in clinical trials or have characteristics that are unexpected, we may need to abandon their development or limit development to more narrow uses or subpopulations in which the adverse events, undesirable side effects or other characteristics are less prevalent, less severe or more acceptable from a risk-benefit perspective. In our industry, many compounds that initially showed promise in early-stage testing have later been found to cause serious adverse events that prevented further development of the compound. In the event that our clinical trials reveal a high or unacceptable severity and prevalence of adverse events, our trials could be suspended or terminated and the FDA or comparable foreign regulatory authorities could order us to cease further development or deny approval of one or more of our product candidates or any future product candidate for any or all targeted indications. The FDA could also issue a letter requesting additional data or information prior to making a final decision regarding whether to approve a product candidate. The number of requests for additional data or information issued by the FDA in recent years has increased and resulted in substantial delays in the approval of several new drugs. Adverse events or undesirable side effects caused by one or more of our product candidates or any future product candidate could also result in the inclusion of unfavorable information in our product labeling, denial of regulatory approval by the FDA or other regulatory authorities for any or all targeted indications, and in turn prevent us from commercializing and generating revenues from the sale of that product candidate. Adverse events or drug-related side effects could affect patient recruitment or the ability of enrolled patients to complete the trial and could result in potential product liability claims.

Additionally, if one or more of our product candidates or any future product candidate receives marketing approval and we or others later identify undesirable side effects caused by this product, a number of potentially significant negative consequences could result, including:

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regulatory authorities may require the addition of unfavorable labeling statements, including specific warnings, black box warnings, adverse reactions, precautions, and/or contraindications;

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regulatory authorities may suspend or withdraw their approval of the product, and/or require it to be removed from the market;

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we may be required to change the way the product is administered, conduct additional clinical trials or change the labeling of the product; or

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our reputation may suffer.

Any of these events could prevent us from achieving or maintaining market acceptance of any of our product candidates or any future product candidate or could substantially increase our commercialization costs and expenses, which in turn could delay or prevent us from generating significant revenues, or any revenues, from its sale.

Public concern regarding the safety of drug products could delay or limit our ability to obtain regulatory approval, result in the inclusion of unfavorable information in our labeling, or require us to undertake other activities that may entail additional costs.

In light of widely publicized events concerning the safety risk of certain drug products, the FDA, members of Congress, the Government Accountability Office, medical professionals and the general public have raised concerns about potential drug safety issues. These events have resulted in the withdrawal of drug products, revisions to drug labeling that further limit use of the drug products and the establishment of risk management programs. The Food and Drug Administration Amendments Act of 2007 (“FDAAA”), grants significant expanded authority to the FDA, much of which is aimed at improving the safety of drug products before and after approval. In particular, the new law authorizes the FDA to, among other things, require post-approval studies and clinical trials, mandate changes to drug labeling to reflect new safety information and require risk evaluation and mitigation strategies for certain drugs, including certain currently approved drugs. It also significantly expands the federal government’s clinical trial registry and results databank, which we expect will result in significantly increased government oversight of clinical trials. Under the FDAAA, companies that violate these and other provisions of the new law are subject to substantial civil monetary penalties, among other regulatory, civil and criminal penalties. The increased attention to drug safety issues may result in a more cautious approach by the FDA in its review of data from our clinical trials. Data from clinical trials may receive greater scrutiny, particularly with respect to safety, which may make the FDA or other regulatory authorities more likely to require additional preclinical studies or clinical trials. If the FDA requires us to conduct additional preclinical studies or clinical trials prior to approving any of our product candidates, our ability to obtain approval of this product candidate will be delayed. If the FDA requires us to provide additional clinical or preclinical data following the approval of any of our product candidates, the indications for which this product candidate is approved may be limited or there may be specific warnings or limitations on dosing, and our efforts to commercialize our product candidates may be otherwise adversely impacted.

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Even if one or more of our product candidates receives regulatory approval, it and any other products we may market will remain subject to substantial regulatory scrutiny.

If one or more of our product candidates that we may license or acquire is approved, the approved product candidate will be subject to ongoing requirements and review by the FDA and other regulatory authorities. These requirements include labeling, packaging, storage, advertising, promotion, record-keeping and submission of safety and other post-market information and reports, registration and listing requirements, cGMP requirements relating to manufacturing, quality control, quality assurance and corresponding maintenance of records and documents, requirements regarding the distribution of samples to physicians and recordkeeping of the drug, and requirements regarding company presentations and interactions with health care professionals.

The FDA, or other regulatory authorities, may also impose requirements for costly post-marketing studies or clinical trials and surveillance to monitor the safety or efficacy of the product. The FDA and other applicable regulatory authorities closely regulate the post-approval marketing and promotion of drugs to ensure drugs are marketed only for the approved indications and in accordance with the provisions of the approved labeling. The FDA and other applicable regulatory authorities impose stringent restrictions on manufacturers’ communications regarding off-label use and if we do not market our products for only their approved indications, we may be subject to enforcement action for off-label marketing. Violations of the Federal Food, Drug and Cosmetic Act relating to the promotion of prescription drugs may lead to investigations, civil claims, and/or criminal charges alleging violations of federal and state health care fraud and abuse laws, as well as state consumer protection laws.

In addition, later discovery of previously unknown adverse events or other problems with our products, manufacturers or manufacturing processes, or failure to comply with regulatory requirements, may yield various results, including:

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restrictions on such products, operations, manufacturers or manufacturing processes;

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restrictions on the labeling or marketing of a product;

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restrictions on product distribution or use;

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requirements to conduct post-marketing studies or clinical trials;

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warning letters, untitled letters, import alerts, and/or inspection observations;

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withdrawal of the products from the market;

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refusal to approve pending applications or supplements to approved applications that we submit;

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recall of products;

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fines, restitution or disgorgement of profits;

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suspension or withdrawal of marketing or regulatory approvals;

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suspension of any ongoing clinical trials;

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refusal to permit the import or export of our products;

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product seizure; or

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injunctions, consent decrees, and/or the imposition of civil or criminal penalties.

The FDA’s policies, or the policies of other applicable regulatory authorities, may change and additional government regulations may be enacted that could prevent, limit or delay regulatory approval of our product candidates, or negatively affect those products for which we may have already received regulatory approval, if any. If we are slow or unable to adapt to changes in existing requirements or the adoption of new requirements or policies, or if we are not able to maintain regulatory compliance, we may be subject to the various actions listed above, including losing any marketing approval that we may have obtained.

Regulatory approval by the FDA, or any similar regulatory authorities outside the United States, is limited to those specific indications and conditions for which clinical safety and efficacy have been demonstrated.

Any regulatory approval is limited to those indications for use for which a product is deemed to be safe and effective by the FDA, or other similar regulatory authorities outside the United States. In addition to the regulatory approval required for new drug products, new formulations or new or additional indications for use for an already approved product also require regulatory approval. If we are not able to obtain regulatory approval for any desired future indications for our products, our ability to effectively market and sell our products may be prevented or reduced, and our business may be adversely affected.

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While physicians may choose to prescribe drugs for uses that are not described in the product’s labeling and for uses that differ from those tested in clinical studies and approved by the regulatory authorities, our ability to promote products is limited to those indications that are specifically approved by the FDA, or similar regulatory authorities outside the United States. These “off-label” uses are common across medical specialties and may constitute an appropriate treatment for some patients in certain circumstances. Regulatory authorities in the U.S. generally do not regulate the practice of medicine or behavior of physicians in their choice of treatments. Regulatory authorities do, however, restrict promotion by pharmaceutical companies on the subject of off-label use. If our promotional activities fail to comply with these regulations or guidelines, we may be subject to warnings from, or enforcement action by, these authorities. In addition, our failure to follow FDA, or any applicable foreign regulatory authority, rules and guidelines relating to promotion and advertising may cause the FDA, or such applicable foreign regulatory authority, to suspend or withdraw an approved product from the market, require a recall or institute fines or penalties, or could result in disgorgement of money, operating restrictions, injunctions or criminal prosecution, any of which could harm our business.

We will need to obtain FDA approval of any proposed product brand names, and any failure or delay associated with such approval may adversely impact our business.

A pharmaceutical product cannot be marketed in the U.S. or other countries until we have completed a rigorous and extensive regulatory review process, including approval of a brand name. Any brand names we intend to use for our product candidates will require approval from the FDA regardless of whether we have secured a formal trademark registration from the United States Patent and Trademark Office (“USPTO”). The FDA typically conducts a review of proposed product brand names, including an evaluation of the potential for confusion with other product names. The FDA may also object to a product brand name if it believes the name inappropriately implies medical claims. If the FDA objects to any of our proposed product brand names, we may be required to adopt an alternative brand name for our product candidates. If we adopt an alternative brand name, we would lose the benefit of our existing trademark applications for such product candidate and may be required to expend significant additional resources in an effort to identify a suitable product brand name that would qualify under applicable trademark laws, not infringe the existing rights of third parties and be acceptable to the FDA. We may be unable to build a successful brand identity for a new trademark in a timely manner or at all, which would limit our ability to commercialize our product candidates.

If our competitors develop treatments for any of our product candidates’ target indications and those competitor products are approved more quickly, marketed more successfully or demonstrated to be more effective, the commercial opportunity for our product candidate will be reduced or eliminated.

The biotechnology and pharmaceutical industries are subject to rapid and intense technological change. We face, and will continue to face, competition in the development and marketing of our product candidates from academic institutions, government agencies, research institutions and biotechnology and pharmaceutical companies. There can be no assurance that developments by others will not render one or more of our product candidates obsolete or noncompetitive. Furthermore, new developments, including the development of other drug technologies and methods of preventing the incidence of disease, occur in the pharmaceutical industry at a rapid pace. These developments may render one or more of our product candidates obsolete or noncompetitive.

Competitors may seek to develop alternative formulations that do not directly infringe on our in-licensed patent rights. The commercial opportunity for one or more of our product candidates could be significantly harmed if competitors are able to develop alternative formulations outside the scope of our in-licensed patents. Compared to us, many of our potential competitors have substantially greater:

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capital resources;

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development resources, including personnel and technology;

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clinical trial experience;

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regulatory experience;

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expertise in prosecution of intellectual property rights; and

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manufacturing, distributing and sales and marketing experience.

As a result of these factors, our competitors may obtain regulatory approval of their products more rapidly than we are able to or may obtain patent protection or other intellectual property rights that limit our ability to develop or commercialize one or more of our product candidates. Our competitors may also develop drugs that are more effective, safe, useful and less costly than ours and may be more successful than us in manufacturing and marketing their products. Smaller or early-stage companies may also prove to be significant competitors, particularly through collaborative arrangements with large and established companies. We will also face competition from

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these third parties in establishing clinical trial sites, in patient registration for clinical trials, and in identifying and in-licensing new product candidates.

Further, generic therapies are typically sold at lower prices than branded therapies and are generally preferred by hospital formularies and managed care providers of health services. We anticipate that, if approved, our product candidates will face increasing competition in the form of generic versions of branded products of competitors, including those that have lost or will lose their patent exclusivity. In the future, we may face additional competition from a generic form of our own candidates when the patents covering them begin to expire, or earlier if the patents are successfully challenged. If we are unable to demonstrate to physicians and payers that the key differentiating features of our product candidates translate to overall clinical benefit or lower cost of care, we may not be able to compete with generic alternatives.

If any of our product candidates are successfully developed but do not achieve broad market acceptance among physicians, patients, healthcare payors and the medical community, the revenues that any such product candidates generate from sales will be limited.

Even if our product candidates receive regulatory approval, they may not gain market acceptance among physicians, patients, healthcare payors and the medical community. Coverage and reimbursement of our product candidates by third-party payors, including government payors, generally would also be necessary for commercial success. The degree of market acceptance of any approved products would depend on a number of factors, including, but not necessarily limited to:

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the efficacy and safety as demonstrated in clinical trials;

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the timing of market introduction of such product candidates as well as competitive products;

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the clinical indications for which the drug is approved;

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acceptance by physicians, major operators of hospitals and clinics and patients of the product as a safe and effective treatment;

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the potential and perceived advantages of product candidates over alternative treatments;

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the safety of product candidates in a broader patient group (i.e. based on actual use);

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the cost of treatment in relation to alternative treatments;

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the availability of adequate reimbursement and pricing by third parties and government authorities;

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changes in regulatory requirements by government authorities for our product candidates

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relative convenience and ease of administration;

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the prevalence and severity of side effects and adverse events;

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the effectiveness of our sales and marketing efforts; and

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unfavorable publicity relating to the product.

If any product candidate is approved but does not achieve an adequate level of acceptance by physicians, hospitals, healthcare payors and patients, we may not generate sufficient revenue from these products and in turn we may not become or remain profitable.

Reimbursement may be limited or unavailable in certain market segments for our product candidates, which could make it difficult for us to sell our products profitably.

There is significant uncertainty related to the third-party coverage and reimbursement of newly approved drugs. Such third-party payors include government health programs such as Medicare, managed care providers, private health insurers and other organizations. We intend to seek approval to market our product candidates in the U.S., Europe and other selected foreign jurisdictions. Market acceptance and sales of our product candidates in both domestic and international markets will depend significantly on the availability of adequate coverage and reimbursement from third-party payors for any of our product candidates and may be affected by existing and future health care reform measures.

Government and other third-party payors are increasingly attempting to contain healthcare costs by limiting both coverage and the level of reimbursement for new drugs and, as a result, they may not cover or provide adequate payment for our product candidates. These payors may conclude that our product candidates are less safe, less effective or less cost-effective than existing or future introduced products, and third-party payors may not approve our product candidates for coverage and reimbursement or may cease providing coverage and reimbursement for these product candidates.

Obtaining coverage and reimbursement approval for a product from a government or other third-party payor is a time consuming and costly process that could require us to provide to the payor supporting scientific, clinical and cost-effectiveness data for the use of our

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products. We may not be able to provide data sufficient to gain acceptance with respect to coverage and reimbursement. If reimbursement of our future products is unavailable or limited in scope or amount, or if pricing is set at unsatisfactory levels, it may impact the market acceptance of our products and we may be unable to achieve or sustain profitability.

In some foreign countries, particularly in the European Union, the pricing of prescription pharmaceuticals is subject to governmental control. In these countries, pricing negotiations with governmental authorities can take considerable time after the receipt of marketing approval for a product candidate. To obtain reimbursement or pricing approval in some countries, we may be required to conduct additional clinical trials that compare the cost-effectiveness of our product candidates to other available therapies. If reimbursement of our product candidates is unavailable or limited in scope or amount in a particular country, or if pricing is set at unsatisfactory levels, we may be unable to achieve or sustain profitability of our products in such country.

If we are unable to establish sales, marketing, and distribution capabilities or to enter into agreements with third parties to market and sell our product candidates, we may be unsuccessful in commercializing our product candidates, if they are approved.

We currently do not have a marketing or sales organization for the marketing, sales and distribution of pharmaceutical products. In order to commercialize any approved product candidate, we would need to build marketing, sales, distribution, managerial and other non-technical capabilities, or arrange for third parties to perform these services, and we may be unsuccessful in doing so. In the event of successful development and regulatory approval of any of our current or future product candidates, we expect to build a targeted specialist sales force to market or co-promote the product. There are risks involved with establishing our own sales, marketing and distribution capabilities. For example, recruiting and training a sales force is expensive and time consuming and could delay any product launch. If the commercial launch of a product candidate for which we recruit a sales force and establish marketing capabilities is delayed or does not occur for any reason, we would have prematurely or unnecessarily incurred these commercialization expenses. This may be costly, and our investment would be lost if we cannot retain or reposition our sales and marketing personnel.

Factors that may inhibit our efforts to commercialize our products on our own include:

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our inability to recruit, train and retain adequate numbers of effective sales and marketing personnel;

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the inability of sales personnel to obtain access to physicians or persuade adequate numbers of physicians to prescribe any future products;

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the lack of complementary or other products to be offered by sales personnel, which may put us at a competitive disadvantage from the perspective of sales efficiency relative to companies with more extensive product lines; and

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unforeseen costs and expenses associated with creating our own sales and marketing organization.

We face potential product liability exposure, and if successful claims are brought against us, we may incur substantial liability for one or more of our product candidates or a future product candidate we may license or acquire and may have to limit their commercialization.

The use of one or more of our product candidates and any future product candidate we may license or acquire in clinical trials and the sale of any products for which we obtain marketing approval expose us to the risk of product liability claims. For example, we may be sued if any product we develop allegedly causes injury or is found to be otherwise unsuitable during clinical testing, manufacturing, marketing or sale. Any such product liability claims may include allegations of defects in manufacturing, defects in design, a failure to warn of dangers inherent in the product, negligence, strict liability or a breach of warranties. Product liability claims might be brought against us by consumers, health care providers or others using, administering or selling our products. If we cannot successfully defend ourselves against these claims, we will incur substantial liabilities. Regardless of merit or eventual outcome, liability claims may result in:

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withdrawal of clinical trial participants;

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suspension or termination of clinical trial sites or entire trial programs;

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decreased demand for any product candidates or products that we may develop;

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initiation of investigations by regulators;

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impairment of our business reputation;

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costs of related litigation;

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substantial monetary awards to patients or other claimants;

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loss of revenues;

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reduced resources of our management to pursue our business strategy; and

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the inability to commercialize our product candidate or future product candidates.

We have obtained, and will continue to obtain, limited product liability insurance coverage for any and all of our current and future clinical trials. However, our insurance coverage may not reimburse us or may not be sufficient to reimburse us for any expenses or losses we may suffer. Moreover, insurance coverage is becoming increasingly expensive, and, in the future, we may not be able to maintain insurance coverage at a reasonable cost or in sufficient amounts to protect us against losses due to liability. If we obtain marketing approval for one or more of our product candidates in development, we intend to expand our insurance coverage to include the sale of commercial products, but we may be unable to obtain commercially reasonable product liability insurance for any products approved for marketing. On occasion, large judgments have been awarded in class action lawsuits based on drugs that had unanticipated side effects. A successful product liability claim or series of claims brought against us could cause our stock price to fall and, if judgments exceed our insurance coverage, could decrease our cash and adversely affect our business.

Risks Related to Reliance on Third Parties

We have contracted with third parties for the manufacture of our approved products, if any. If such contract manufacturer fails to timely produce sufficient product volume, to pass regulatory inspections or re-inspections, or to comply with applicable regulations, the commercialization of our product candidates may be delayed, we may be unable to meet market demand, and we may lose potential revenues.

The manufacture of pharmaceutical products requires significant expertise and capital investment, including the development of advanced manufacturing techniques and process controls, and the use of specialized processing equipment. We have entered into development and supply agreements with one or more contract manufacturers for the completion of pre-commercialization manufacturing development activities and the manufacture of commercial supplies for each of our product candidates. Any termination or disruption of our relationships with our contract manufacturers may materially harm our business and financial condition and frustrate any commercialization efforts for each respective product candidate.

All of our contract manufacturers must comply with strictly enforced federal, state and foreign regulations, including cGMP requirements enforced by the FDA through its establishment inspection program. We are required by law to establish adequate oversight and control over raw materials, components and finished products furnished by our third-party suppliers and contract manufacturers, but we have little control over their compliance with these regulations.

Any failure to pass regulatory inspections or re-inspections, or comply with applicable regulations may result in fines and civil penalties, suspension of production, restrictions on imports and exports, suspension or delay in product approval, product seizure or recall, or withdrawal of product approval, and would limit the availability of our product and customer confidence in our product. Any manufacturing defect or error discovered after products have been produced and distributed could result in even more significant consequences, including costly recall procedures, re-stocking costs, potential for breach of contract claims, damage to our reputation and potential for product liability claims.

If the contract manufacturers upon whom we rely to manufacture one or more of our product candidates, and any future product candidate we may in-license, fails to deliver the required commercial quantities on a timely basis at commercially reasonable prices, we would likely be unable to meet demand for our products and we would lose potential revenues.

We rely, and expect to continue to rely, on third parties to conduct our preclinical studies and clinical trials. Those third parties may perform unsatisfactorily, fail to meet deadlines for trial completion, or to comply with applicable regulatory requirements.

We rely on third-party CROs and site management organizations to conduct some of our preclinical studies and all our clinical trials for our product candidates, and plan to do the same for any future product candidate. We expect to continue to rely on third parties, such as CROs, site management organizations, image reading vendors, laboratories, clinical data management organizations, medical institutions and clinical investigators, to conduct some of our preclinical studies and all of our clinical trials. The agreements with these third parties might terminate for a variety of reasons, including a failure to perform by the third parties. If we need to enter into alternative arrangements, that could delay our product development activities.

Our reliance on these third parties for research and development activities reduces our control over these activities but does not relieve us of our responsibilities. For example, we remain responsible for ensuring that each of our preclinical studies and clinical trials are

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conducted in accordance with the general investigational plan and protocols for the trial and for ensuring that our preclinical studies are conducted in accordance with good laboratory practices (“GLPs”) as appropriate. Moreover, the FDA requires us to comply with standards, commonly referred to as good clinical practices (“GCPs”), for conducting, recording and reporting the results of clinical trials to assure that data and reported results are credible and accurate and that the rights, integrity and confidentiality of trial participants are protected. Regulatory authorities enforce these requirements through periodic inspections of trial sponsors, clinical investigators and trial sites. If we or any of our clinical research organizations or other third-party vendors, institutions or investigators fail to pass regulatory inspections or fail to comply with applicable GCPs, the clinical data generated in our clinical trials may be deemed unreliable and the FDA or comparable foreign regulatory authorities may require us to perform additional clinical trials before approving our marketing applications. We cannot assure you that upon inspection by a regulatory authority, such regulatory authority will determine that any of our clinical trials complies with GCP regulations. In addition, our clinical trials must be conducted with product produced under cGMP regulations. Our failure to comply with these regulations may require us to repeat clinical trials, which would delay the regulatory approval process. We also are required to register ongoing clinical trials and post the results of completed clinical trials on a government-sponsored database, ClinicalTrials.gov, within specified timeframes. Failure to do so can result in fines, adverse publicity and civil and criminal sanctions.

The third parties with whom we have contracted to help perform our preclinical studies and/or clinical trials may also have relationships with other entities, some of which may be our competitors. If these third parties do not successfully carry out their contractual duties, meet expected deadlines or conduct our preclinical studies or clinical trials in accordance with regulatory requirements or our stated protocols, we will not be able to obtain, or may be delayed in obtaining, marketing approvals for our product candidates and will not be able to, or may be delayed in our efforts to, successfully commercialize our product candidates.

If any of our relationships with these third-party CROs or site management organizations terminate, we may not be able to enter into arrangements with alternative CROs or site management organizations or to do so on commercially reasonable terms. Switching or adding additional CROs or site management organizations involves additional cost and requires management time and focus. In addition, there is a natural transition period when a new CRO or site management organization commences work. As a result, delays could occur, which could compromise our ability to meet our desired development timelines. Though we carefully manage our relationships with our CROs or site management organizations, there can be no assurance that we will not encounter similar challenges or delays in the future. Forces beyond our control could disrupt the ability of our third-party CROs, site management organizations, image reading vendors, laboratories, clinical data management organizations, medical institutions and clinical investigators to conduct our preclinical studies and our clinical trials for our product candidates and for any future product candidate.

We rely, and expect to continue to rely, on third parties for the manufacture of our product candidates for preclinical and clinical testing, and for the future commercialization of our approved products, if any. Reliance on third parties increases the risk that we will not have sufficient quantities of our products or such quantities at an acceptable cost, which could delay, prevent or impair our development or commercialization efforts.

We do not have any manufacturing facilities. We rely, and expect to continue to rely, on third parties for the manufacture of our product candidates for preclinical and clinical testing, and plan to do so for commercial manufacture of any of our product candidates that may receive marketing approval. This reliance on third parties increases the risk that we will not have sufficient quantities of our product candidates or any future product candidate or such quantities at an acceptable cost or quality, which could delay, prevent or impair our development or commercialization efforts.

We also expect to rely on third-party manufacturers or third-party collaborators for the manufacture of commercial supply of any product candidates for which our collaborators or we may obtain marketing approval. We may be unable to establish or maintain any agreements with third-party manufacturers or to do so on acceptable terms. Even if we are able to establish agreements with third-party manufacturers, reliance on third-party manufacturers entails additional risks, including:

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reliance on the third party for regulatory compliance and quality assurance, while still being required by law to establish adequate oversight and control over products furnished by that third party;

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the possible breach of the manufacturing agreement by the third party;

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manufacturing delays if our third-party manufacturers are unable to obtain raw materials due to supply chain disruptions, give greater priority to the supply of other products over our product candidates or otherwise do not satisfactorily perform according to the terms of the agreement between us;

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the possible misappropriation of our proprietary information, including our trade secrets and know-how; and

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the possible termination or nonrenewal of the agreement by the third party at a time that is costly or inconvenient for us.

We rely on our third-party manufacturers to produce or purchase from third-party suppliers the materials necessary to produce our product candidates for our preclinical and clinical trials. There are a limited number of suppliers for raw materials that we use to manufacture our drugs and there may be a need to assess alternate suppliers to prevent a possible disruption of the manufacture of the materials necessary to produce our product candidates for our preclinical and clinical trials, and if approved, ultimately for commercial sale. We do not have any control over the process or timing of the acquisition of these raw materials by our third-party manufacturers. Forces beyond our control could disrupt the global supply chain and impact our or our third-party manufacturers’ ability to obtain raw materials or other products necessary to manufacture our product candidates. Any significant delay in the supply of a product candidate, or the raw material components thereof, for an ongoing preclinical or clinical trial due to the need to replace a third-party manufacturer could considerably delay completion of our preclinical or clinical trials, product testing and potential regulatory approval of our product candidates. If our third-party manufacturers or we are unable to purchase these raw materials after regulatory approval has been obtained for a product candidate, the commercial launch of that product candidate would be delayed or there would be a shortage in supply, which would impair our ability to generate revenues from the sale of our product candidates.

The facilities used by our third-party manufacturers to manufacture our product candidates must be approved by the FDA pursuant to inspections that will be conducted after we submit an NDA or BLA to the FDA. We are required by law to establish adequate oversight and control over raw materials, components and finished products furnished by our third-party manufacturers, but we do not control the day-to-day manufacturing operations of, and are dependent on, our third-party manufacturers for compliance with cGMP regulations for manufacture of our product candidates. Third-party manufacturers may not be able to comply with the cGMP regulations or similar regulatory requirements outside the United States. Our failure, or the failure of our third-party manufacturers, to comply with applicable regulations and pass regulatory inspections could result in sanctions being imposed on us, including clinical holds, fines, injunctions, restrictions on imports and exports, civil penalties, delays, suspension or withdrawal of approvals, license revocation, seizures or recalls of product candidates or products, operating restrictions and criminal prosecutions, any of which could significantly and adversely affect supplies of our products.

In 2023, our contract manufacturer for cosibelimab received certain observations from the FDA on Form 483 related to a multi-sponsor on-site inspection. In December 2023, the FDA issued a CRL for the cosibelimab BLA due to those inspection issues. Checkpoint intends to seek to address the issues raised in the CRL in a potential BLA resubmission. The FDA’s review of our planned resubmission may require a re-inspection of our third-party contract manufacturing organization. There is no guarantee that the FDA will agree with the response and remediations in a timely manner or at all, or that our third party-contract manufacturing organization will pass a regulatory re-inspection, which could negatively impact our ability to obtain regulatory approval for cosibelimab or obtain approval within reasonable timelines. Any further delays in approval will continue to increase our costs and could further delay or impede our ability to commence product sales and generate revenues.

One or more of the product candidates that we may develop may compete with other product candidates and products for access to manufacturing facilities. There are a limited number of manufacturers that operate under cGMP regulations and that might be capable of manufacturing for us. Any performance failure on the part of our existing or future third-party manufacturers could delay clinical development or marketing approval. We do not currently have arrangements in place for redundant supply or a second source for bulk drug substance or the manufacture of drug product. If our current third-party manufacturers cannot perform as agreed, we may be required to replace such manufacturers. We may incur added costs and delays in identifying and qualifying any replacement manufacturers.

The U.S. DEA restricts the importation of a controlled substance finished drug product when the same substance is commercially available in the United States, which could reduce the number of potential alternative manufacturers for one or more of our product candidates.

Our current and anticipated future dependence upon others for the manufacture of our product candidates or products may adversely affect our future profit margins and our ability to commercialize any products that may receive marketing approval on a timely and competitive basis.

We also expect to rely on other third parties to store and distribute drug supplies for our clinical trials. Any performance failure on the part of our distributors could delay clinical development or marketing approval of our product candidates or commercialization of our products, if approved, producing additional losses and depriving us of potential product revenue.

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We rely on clinical data and results obtained by third parties that could ultimately prove to be inaccurate or unreliable.

As part of our strategy to mitigate development risk, we seek to develop product candidates with well-studied mechanisms of action and may utilize biomarkers to assess potential clinical efficacy early in the development process. This strategy necessarily relies upon clinical data and other results obtained by third parties that may ultimately prove to be inaccurate or unreliable. Further, such clinical data and results may be based on products or product candidates that are significantly different from our product candidates or any future product candidate. If the third-party data and results we rely upon prove to be inaccurate, unreliable or not applicable to our product candidates or future product candidate, we could make inaccurate assumptions and conclusions about our product candidates and our research and development efforts could be compromised.

Risks Relating to Legislation and Regulation Affecting the Biopharmaceutical and Other Industries

We cannot predict the likelihood, nature or extent of government regulation that may arise from future legislation or administrative or executive action, either in the United States or abroad.

We cannot predict the likelihood, nature or extent of how government regulation that may arise from future legislation or administrative or executive action taken by the U.S. presidential administration may impact our business and industry. In particular, the U.S. President has taken several executive actions, specifically through rulemaking and guidance, that could impact the pharmaceutical business and industry. A few of the major administrative actions include:

On October 9, 2019, the Centers for Medicare & Medicaid Services (“CMS”) issued a proposed rule entitled, Modernizing and Clarifying the Physician Self-Referral Regulations and on the same day the HHS Office of Inspector General issued a similar rule, entitled Revisions to Safe Harbors Under the Anti-Kickback Statute, and Civil Monetary penalty Rules Regarding Beneficiary Inducements. The proposed rules are an effort to reform regulations dealing with anti-kickback and self-referral laws. The proposals are attempting to allow certain financial arrangements that would otherwise violate anti-kickback and self-referral laws for providers that are participating in value-based payment arrangements. The proposed rule could impact drug purchasing behavior to ensure providers are within their budget and/or restructure existing payment structures between providers and manufacturers.

On October 30, 2019, the Administration issued an advanced notice of proposed rulemaking (“ANPRM”) entitled, International Pricing Index Model for Medicare Part B Drugs. This ANPRM is soliciting feedback on a potential proposal to align United States drug prices in the Medicare Part B program with international prices. It also solicits public feedback on a policy that would allowing private-sector vendors to negotiate prices, take title to drugs, and improve competition for hospital and physician business. Although this is only a notice for a potential rule, it signals the Administration’s desire to regulatorily influence the United States drug pricing system that could adversely affect the industry.

On November 15, 2019, CMS issued a proposed rule entitled, Transparency in Coverage and finalized the Calendar Year (“CY”) 2020 Outpatient Prospective Payment System (“OPPS”) & Ambulatory Surgical Center Price Transparency Requirements for Hospitals to Make Standard Charges Rule. Together the rules would increase price transparency through health plans and in hospitals. The affects may influence consumer purchasing habits in the health care sector as a whole. Although the transparency provisions are not yet in effect and the hospital price transparency requirements are subject to litigation, there could be implications for the industry related to drug pricing if or when it is enacted.

On November 18, 2019, CMS issued a proposed rule entitled, Medicaid Fiscal Accountability Regulation (“MFAR”). The proposed rule would significantly impact states’ ability to finance their Medicaid programs. If finalized, the MFAR could force states to restructure their Medicaid financing that could disincentivize or change state prescription drug purchasing behavior that would adversely impact the industry.

On December 18, 2019, the FDA issued a proposed rule entitled, Importation of Prescription Drugs. The proposed rule would allow the importation of certain prescription drugs from Canada. If finalized, states or other non-federal government entities would be able to submit importation program proposals to FDA for review and authorization. This proposed rule could also influence pricing practices in the United States.

On January 30, 2020, CMS issued a state waiver option entitled, Health Adult Opportunity (“HAO”). The HAO would allow states to restructure benefits and coverage policies for their Medicaid programs. The HAO will provide states administrative flexibilities in exchange for a capped federal share. The cap on the federal share is commonly referred to as a “block grant.” Importantly, the HAO allows states to set formularies that align with Essential Health Benefit requirements while still requiring manufacturers to participate in the Medicaid Rebate Program. Depending on utilization of the HAO by states, it could impact the industry – especially if states elect to use a formulary.

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We are subject to new legislation, regulatory proposals and managed care initiatives that may increase our costs of compliance and adversely affect our ability to market our products, obtain collaborators and raise capital.

In the United States and certain foreign jurisdictions, there have been, and we expect there will continue to be, a number of legislative and regulatory changes to the healthcare system. In March 2010, the Patient Protection and Affordable Care Act, as amended by the Health Care and Education Reconciliation Act of 2010, or collectively, the ACA, was signed into law, which substantially changed the way healthcare is financed by both governmental and private insurers in the United States. By way of example, the ACA increased the minimum level of Medicaid rebates payable by manufacturers of brand name drugs from 15.1% to 23.1%; it required collection of rebates for drugs paid by Medicaid managed care organizations; it imposed a non-deductible annual fee on pharmaceutical manufacturers or importers who sell certain “branded prescription drugs” to specified federal government programs; it implemented a new methodology under which rebates owed by manufacturers under the Medicaid Drug Rebate Program are calculated for drugs that are inhaled, infused, instilled, implanted, or injected; it expanded the eligibility criteria for Medicaid programs; it created a new Patient-Centered Outcomes Research Institute to oversee, identify priorities in, and conduct comparative clinical effectiveness research, along with funding for such research; and it established a Center for Medicare and Medicaid Innovation (“CMMI”) at CMS to test innovative payment and service delivery models to lower Medicare and Medicaid spending, potentially including prescription drug spending.

Since its enactment, there have been executive, judicial and Congressional challenges to certain aspects of the ACA, and we expect there will be additional challenges and amendments to the ACA in the future. President Trump signed several Executive Orders and other directives designed to delay the implementation of certain provisions of the ACA or otherwise circumvent some of the requirements for health insurance mandated by the ACA. Concurrently, Congress has considered legislation that would repeal or repeal and replace all or part of the ACA. While Congress has not passed comprehensive repeal legislation, several bills affecting the implementation of certain taxes under the ACA have been enacted. For example, in 2017, Congress enacted the Tax Cuts and Jobs Act, which eliminated the tax-based shared responsibility payment imposed by the ACA on certain individuals who fail to maintain qualifying health coverage for all or part of a year, a process that is commonly referred to as the “individual mandate.” In addition, the Further Consolidated Appropriations Act, 2020 permanently eliminated, effective January 1, 2020, the ACA-mandated “Cadillac” tax on high-cost employer-sponsored health coverage and medical device tax; and, effective January 1, 2021, it also eliminated the health insurance tax. On December 14, 2018, the U.S. District Court for the Northern District of Texas ruled that the individual mandate is a critical and inseverable feature of the ACA, and therefore, because it was repealed as part of the Tax Act, the remaining provisions of the ACA are invalid as well. On December 18, 2019, the U.S. Court of Appeals for the Fifth Circuit ruled that the individual mandate was unconstitutional and remanded the case back to the District Court to determine whether the remaining provisions of the ACA are invalid as well. On June 17, 2021, the U.S. Supreme Court reversed the ruling of the Fifth Circuit, holding that the challengers lacked standing to sue and otherwise abstaining from reaching the merits of the case. Notwithstanding the resolution of this legal challenge, there may be other efforts to challenge, repeal, or replace the ACA. We are continuing to monitor any changes to the ACA that, in turn, may potentially impact our business in the future.

President Joseph R. Biden, Jr. signed an Executive Order on Strengthening Medicaid and the Affordable Care Act, stating his administration’s intentions to reverse the actions of his predecessor and strengthen the ACA. As part of this Executive Order, the Department of Health and Human Services, United States Treasury, and the Department of Labor are directed to review all existing regulations, orders, guidance documents, policies, and agency actions and to consider if they are consistent with ensuring coverage under the ACA making high-quality healthcare affordable and accessible to Americans. We are unable to predict the likelihood of changes to the ACA or other healthcare laws which may negatively impact our profitability.

President Biden intends, as his predecessor did, to take action against drug prices which are considered “high.” Such measures could be addressed in a legislative package later in 2021 or with the reauthorization of the Prescription Drug User Fee Act (“PDUFA”) in 2022. Drug pricing continues to be a subject of debate at the executive and legislative levels of U.S. government and we expect to see legislation focusing on this in the coming year. The American Rescue Plan Act of 2021 signed into law by President Biden on March 14, 2021 includes a provision that will eliminate the statutory cap on rebates drug manufacturers pay to Medicaid beginning in January 2024. With the elimination of the rebate cap, manufacturers may be required to compensate states in an amount greater than what the state Medicaid programs pay for the drug.

Other legislative changes have been proposed and adopted since the ACA was enacted. These changes include aggregate reductions to Medicare payments to providers of up to 2% per fiscal year, effective April 1, 2013, which, due to subsequent legislative amendments, will stay in effect through 2030 with the exception of a temporary suspension implemented under various COVID-19 relief legislation from May 1, 2020 through December 31, 2021. Moreover, there has recently been heightened governmental scrutiny over the manner in which manufacturers set prices for their marketed products, which has resulted in several Congressional inquiries and proposed and

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enacted legislation designed, among other things, to bring more transparency to product pricing, to review the relationship between pricing and manufacturer patient assistance programs, and to reform government program reimbursement methodologies for pharmaceutical products. The Prescription Drug Pricing Reduction Act, or PDPRA, which was introduced in Congress in 2019, and again in 2020, proposed to, among other things, penalize pharmaceutical manufacturers for raising prices on drugs covered by Medicare Parts B and D faster than the rate of inflation, cap out-of-pocket expenses for Medicare Part D beneficiaries, and several changes to how drugs are reimbursed in Medicare Part B. A similar drug pricing bill, the Elijah E. Cummings Lower Drug Costs Now Act, proposes to enable direct price negotiations by the federal government for certain drugs (with the maximum price paid by Medicare capped based on an international index), requires manufacturers to offer these negotiated prices to other payers, and restricts manufacturers from raising prices on drugs covered by Medicare Parts B and D. This Act passed in the House of Representatives when it was introduced in 2019, and it has been introduced again in the 2021 term. We cannot predict whether any proposed legislation will become law and the effect of these possible changes on our business cannot be predicted at this time.

Our current and future relationships with customers and third-party payors in the United States and elsewhere may be subject, directly or indirectly, to applicable anti-kickback, fraud and abuse, false claims, transparency, health information privacy and security and other healthcare laws and regulations, which could expose us to criminal sanctions, civil penalties, contractual damages, reputational harm, administrative burdens and diminished profits and future earnings.

Healthcare providers, physicians and third-party payors in the United States and elsewhere will play a primary role in the recommendation and prescription of any product candidates for which we obtain marketing approval. Our future arrangements with third-party payors and customers may expose us to broadly applicable fraud and abuse and other healthcare laws and regulations, including, without limitation, the federal Anti-Kickback Statute and the federal False Claims Act, which may constrain the business or financial arrangements and relationships through which we sell, market and distribute any product candidates for which we obtain marketing approval. In addition, we may be subject to transparency laws and patient privacy regulation by U.S. federal and state governments and by governments in foreign jurisdictions in which we conduct our business. The applicable federal, state and foreign healthcare laws and regulations that may affect our ability to operate include:

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the federal Anti-Kickback Statute, which prohibits, among other things, persons from knowingly and willfully soliciting, offering, receiving or providing remuneration, directly or indirectly, in cash or in kind, to induce or reward, or in return for, either the referral of an individual for, or the purchase, order or recommendation of, any good or service, for which payment may be made under federal and state healthcare programs, such as Medicare and Medicaid;

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federal civil and criminal false claims laws and civil monetary penalty laws, including the federal False Claims Act, which impose criminal and civil penalties, including civil whistleblower or qui tam actions, against individuals or entities for knowingly presenting, or causing to be presented, to the federal government, including the Medicare and Medicaid programs, claims for payment that are false or fraudulent or making a false statement to avoid, decrease or conceal an obligation to pay money to the federal government; the federal Health Insurance Portability and Accountability Act of 1996 (“HIPAA”), which imposes criminal and civil liability for executing a scheme to defraud any healthcare benefit program or making false statements relating to healthcare matters;

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HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act of 2009 (“HITECH”), and their respective implementing regulations, which impose obligations on covered healthcare providers, health plans, and healthcare clearinghouses, as well as their business associates that create, receive, maintain or transmit individually identifiable health information for or on behalf of a covered entity, with respect to safeguarding the privacy, security and transmission of individually identifiable health information;

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the federal Open Payments program, which requires manufacturers of certain approved drugs, devices, biologics and medical supplies for which payment is available under Medicare, Medicaid or the Children’s Health Insurance Program, with specific exceptions, to report annually to the Centers for Medicare & Medicaid Services (“CMS”), information related to “payments or other transfers of value” made to physicians, which is defined to include doctors, dentists, optometrists, podiatrists and chiropractors, and teaching hospitals and applicable manufacturers and applicable group purchasing organizations to report annually to CMS ownership and investment interests held by the physicians and their immediate family members. Data collection began on August 1, 2013 with requirements for manufacturers to submit reports to CMS by March 31, 2014 and 90 days after the end each subsequent calendar year. Disclosure of such information was made by CMS on a publicly available website beginning in September 2014; and

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analogous state and foreign laws and regulations, such as state anti-kickback and false claims laws, which may apply to sales or marketing arrangements and claims involving healthcare items or services reimbursed by non-governmental third- party payors, including private insurers; state and foreign laws that require pharmaceutical companies to comply with the pharmaceutical industry’s voluntary compliance guidelines and the relevant compliance guidance promulgated by the federal

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government or otherwise restrict payments that may be made to healthcare providers; state and foreign laws that require drug manufacturers to report information related to payments and other transfers of value to physicians and other healthcare providers or marketing expenditures; and state and foreign laws governing the privacy and security of health information in certain circumstances, many of which differ from each other in significant ways and often are not preempted by HIPAA, thus complicating compliance efforts.

Efforts to ensure that our business arrangements with third parties will comply with applicable healthcare laws and regulations may involve substantial costs. It is possible that governmental authorities will conclude that our business practices may not comply with current or future statutes, regulations or case law involving applicable fraud and abuse or other healthcare laws and regulations. If our operations are found to be in violation of any of these laws or any other governmental regulations that may apply to us, we may be subject to significant civil, criminal and administrative penalties, including, without limitation, damages, fines, imprisonment, exclusion from participation in government healthcare programs, such as Medicare and Medicaid, and the curtailment or restructuring of our operations, which could have a material adverse effect on our business. If any of the physicians or other healthcare providers or entities with whom we expect to do business, including our collaborators, is found not to be in compliance with applicable laws, it may be subject to criminal, civil or administrative sanctions, including exclusions from participation in government healthcare programs, which could also materially affect our business.

Risks Related to Intellectual Property and Potential Disputes with Licensors Thereof

If we are unable to obtain and maintain sufficient patent protection for our technology and products, our competitors could develop and commercialize technology and products similar or identical to ours, and our ability to successfully commercialize our technology and products may be impaired.

Our commercial success will depend in part on obtaining and maintaining patent protection and trade secret protection in the United States and other countries with respect to our product candidates or any future product candidate that we may license or acquire and the methods we use to manufacture them, as well as successfully defending these patents and trade secrets against third-party challenges. We seek to protect our proprietary position by filing patent applications in the United States and abroad related to our novel technologies and product candidates, and by maintenance of our trade secrets through proper procedures. We will only be able to protect our technologies from unauthorized use by third parties to the extent that valid and enforceable patents or trade secrets cover them in the market they are being used or developed.

The patent prosecution process is expensive and time-consuming, and we may not be able to file and prosecute all necessary or desirable patent applications at a reasonable cost or in a timely manner. It is also possible that we will fail to identify any patentable aspects of our research and development output and methodology, and, even if we do, an opportunity to obtain patent protection may have passed. Given the uncertain and time-consuming process of filing patent applications and prosecuting them, it is possible that our product(s) or process(es) originally covered by the scope of our patent applications may change or be modified throughout the patent prosecution process, leaving our product(s) or process(es) without patent protection. If our licensors or we fail to obtain or maintain patent protection or trade secret protection for one or more product candidates or any future product candidate we may license or acquire, third parties may be able to leverage our proprietary information and products without risk of infringement, which could impair our ability to compete in the market and adversely affect our ability to generate revenues and achieve profitability. Moreover, should we enter into other collaborations we may be required to consult with or cede control to collaborators regarding the prosecution, maintenance, defense and enforcement of patents licensed or developed under such collaborations. Therefore, these patents and applications may not be prosecuted, defended, and enforced in a manner consistent with the best interests of our business.

The patent position of biotechnology and pharmaceutical companies generally is highly uncertain, involves complex legal and factual questions and has in recent years been the subject of much litigation. In addition, no consistent policy regarding the breadth of claims allowed in pharmaceutical or biotechnology patents has emerged to date in the U.S. The patent situation outside the U.S. is even more uncertain. The patent laws of foreign countries may not protect our patent rights to the same extent as the laws of the United States, and we may fail to seek or obtain patent protection in all major markets. For example, European patent law restricts the patentability of methods of treatment of the human body more than United States patent law does. Publications of discoveries in the scientific literature often lag behind the actual discoveries, and patent applications in the United States and other jurisdictions are typically not published until 18 months after a first filing, or in some cases not at all. Therefore, we cannot know with certainty whether we or our licensors were the first to make the inventions claimed in patents or pending patent applications that we own or licensed, or that we or our licensors were the first to file for patent protection of such inventions. In the event that a third party has also filed a U.S. patent application relating to our product candidates or a similar invention, depending upon the priority dates claimed by the competing parties, we may have to

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participate in interference proceedings declared by the USPTO to determine priority of invention in the U.S. The costs of these proceedings could be substantial and it is possible that our efforts to establish priority of invention would be unsuccessful, resulting in a material adverse effect on our U.S. patent position. As a result, the issuance, scope, validity, enforceability and commercial value of our or any of our respective licensors’ patent rights are highly uncertain. Our pending and future patent applications may not result in patents being issued which protect our technology or products, in whole or in part, or which effectively prevent others from commercializing competitive technologies and products. Changes in either the patent laws or interpretation of the patent laws in the United States and other countries may diminish the value of our patents or narrow the scope of our patent protection. For example, the federal courts of the United States have taken an increasingly dim view of the patent eligibility of certain subject matter, such as naturally occurring nucleic acid sequences, amino acid sequences and certain methods of utilizing the same, which include their detection in a biological sample and diagnostic conclusions arising from their detection. Such subject matter, which had long been a staple of the biotechnology and biopharmaceutical industry to protect their discoveries, is now considered, with few exceptions, ineligible in the first instance for protection under the patent laws of the United States. Accordingly, we cannot predict the breadth of claims that may be allowed or enforced in our patents or in those licensed from a third-party.

In addition, U.S. patent laws may change, which could prevent or limit us from filing patent applications or patent claims to protect products and/or technologies or limit the exclusivity periods that are available to patent holders, as well as affect the validity, enforceability, or scope of issued patents.

Moreover, the patents or patent applications owned or filed by us, or by our licensors or other collaborators, may be subject to a third-party pre-issuance submission of prior art to the USPTO, or to opposition, derivation, reexamination, inter partes review, post-grant review or interference proceedings challenging our patent rights or the patent rights of our licensors or collaborators. The costs of these proceedings could be substantial and it is possible that our efforts to establish priority of invention would be unsuccessful, resulting in a material adverse effect on our U.S. patent position. An adverse determination in any such submission, patent office trial, proceeding or litigation could reduce the scope of, render unenforceable, or invalidate, our patent rights, allow third parties to commercialize our technology or products and compete directly with us, without payment to us, or result in our inability to manufacture or commercialize products without infringing third-party patent rights. In addition, if the breadth or strength of protection provided by our patents and patent applications is threatened, it could dissuade companies from collaborating with us to license, develop or commercialize current or future product candidates.

Even if our patent applications issue as patents, they may not issue in a form that will provide us with any meaningful protection, prevent competitors from competing with us or otherwise provide us with any competitive advantage. Our competitors may be able to circumvent our owned or licensed patents by developing similar or alternative technologies or products in a non-infringing manner.

The issuance of a patent does not foreclose challenges to its inventorship, scope, validity or enforceability. Therefore, our owned and licensed patents may be challenged in the courts or patent offices in the United States and abroad. Such challenges may result in loss of exclusivity or in patent claims being narrowed, invalidated or held unenforceable, in whole or in part, which could limit our ability to stop others from using or commercializing similar or identical technology and products, or limit the duration of the patent protection of our technology and products. Given the amount of time required for the development, testing and regulatory review of new product candidates, patents protecting such product candidates might expire before or shortly after such product candidates are commercialized. As a result, our owned and licensed patent portfolio may not provide us with sufficient rights to exclude others from commercializing products similar or identical to ours.

We may need to license certain intellectual property from third parties, and such licenses may not be available or may not be available on commercially reasonable terms.

A third party may hold intellectual property, including patent rights that are important or necessary to the development and commercialization of our products. It may be necessary for us to use the patented or proprietary technology of third parties, whom may or may not be interested in granting such a license, to commercialize our products, in which case we would be required to obtain a license from these third parties on commercially reasonable terms, or our business could be harmed, possibly materially.

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We depend on our licensors to maintain and enforce the intellectual property covering certain of our product candidates. We have limited, if any, control over the resources that our licensors can or will devote to securing, maintaining, and enforcing patents protecting our product candidates.

We depend on our licensors to protect the proprietary rights covering our antibody and certain of our small molecule product candidates and we have limited, if any, control over the amount or timing of resources that they devote on our behalf, or the priority they place on, maintaining patent rights and prosecuting patent applications to our advantage. Moreover, we have limited, if any, control over the strategies and arguments employed in the maintenance of patent rights and the prosecution of patent applications to our advantage.

Our licensors, depending on the patent or application, are responsible for maintaining issued patents and prosecuting patent applications for our antibody and certain of our small molecule product candidates. We cannot be sure that they will perform as required. Should they decide they no longer want to maintain any of the patents licensed to us, they are required to afford us the opportunity to do so at our expense. If our licensors do not perform, and if we do not assume the maintenance of the licensed patents in sufficient time to make required payments or filings with the appropriate governmental agencies, we risk losing the benefit of all or some of those patent rights. Moreover, and possibly unbeknownst to us, our licensors may experience serious difficulties related to their overall business or financial stability, and they may be unwilling or unable to continue to expend the financial resources required to maintain and prosecute these patents and patent applications. While we intend to take actions reasonably necessary to enforce our patent rights, we depend, in part, on our licensors to protect a substantial portion of our proprietary rights and to inform us of the status of those protections and efforts thereto.

Our licensors may also be notified of alleged infringement and be sued for infringement of third-party patents or other proprietary rights. We may have limited, if any, control or involvement over the defense of these claims, and our licensors could be subject to injunctions and temporary or permanent exclusionary orders in the U.S. or other countries. Our licensors are not obligated to defend or assist in our defense against third-party claims of infringement. We have limited, if any, control over the amount or timing of resources, if any, that our licensors devote on our behalf or the priority they place on defense of such third-party claims of infringement.

Because of the uncertainty inherent in any patent or other litigation involving proprietary rights, we or our licensors may not be successful in defending claims of intellectual property infringement alleged by third parties, which could have a material adverse effect on our results of operations. Regardless of the outcome of any litigation, defending the litigation may be expensive, time-consuming and distracting to management.

Protecting our proprietary rights is difficult and costly, and we may be unable to ensure their protection.

The degree of future protection for our proprietary rights is uncertain, because legal means afford only limited protection and may not adequately protect our rights or permit us to gain or keep our competitive advantage, in addition to being costly and time consuming to undertake. For example:

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our licensors might not have been the first to make the inventions covered by each of our pending patent applications and issued patents;

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our licensors might not have been the first to file patent applications for these inventions;

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others may independently develop similar or alternative technologies or duplicate our product candidates or any future product candidate technologies;

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it is possible that none of the pending patent applications licensed to us will result in issued patents;

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the scope of our issued patents may not extend to competitive products developed or produced by others;

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the issued patents covering our product candidates or any future product candidate may not provide a basis for market exclusivity for active products, may not provide us with any competitive advantages, or may be challenged by third parties;

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we may not develop additional proprietary technologies that are patentable; or

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intellectual property rights of others may have an adverse effect on our business.

We may become involved in lawsuits to protect or enforce our patents or other intellectual property, which could be expensive, time consuming and unsuccessful, and an unfavorable outcome in any litigation would harm our business.

Competitors may infringe our issued patents or other intellectual property. To counter infringement or unauthorized use, we may be required to file one or more actions for patent infringement, which can be expensive and time consuming. Any claims we assert against accused infringers could provoke these parties to assert counterclaims against us alleging invalidity of our patents or that we infringe

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their patents; or provoke those parties to petition the USPTO to institute inter partes review against the asserted patents, which may lead to a finding that all or some of the claims of the asserted patents are invalid. In addition, in a patent infringement proceeding, a court may decide that a patent of ours is invalid or unenforceable, in whole or in part, construe the patent’s claims narrowly or refuse to stop the other party from using the technology at issue on the grounds that our patents do not cover the technology in question. An adverse result in any litigation proceeding could put one or more of our pending patents at risk of being invalidated, rendered unenforceable, or interpreted narrowly. Because of the substantial amount of discovery required in connection with intellectual property litigation, there is a risk that some of our confidential information could be compromised by disclosure during this type of litigation. Furthermore, adverse results on U.S. patents may affect related patents in our global portfolio.

Our ability to develop, manufacture, market and sell one or more of our product candidates or any future product candidate that we may license or acquire depends upon our ability to avoid infringing the proprietary rights of third parties. Numerous U.S. and foreign issued patents and pending patent applications, which are owned by third parties, exist in the general fields of fully human immuno-oncology targeted antibodies and targeted anti-cancer agents and cover the use of numerous compounds and formulations in our targeted markets. Because of the uncertainty inherent in any patent or other litigation involving proprietary rights, we and our licensors may not be successful in defending intellectual property claims asserted by third parties, which could have a material adverse effect on our results of operations. Regardless of the outcome of any litigation, defending the litigation may be expensive, time-consuming and distracting to management. In addition, because patent applications can take many years to issue, there may be currently pending applications that are unknown to us, which may later result in issued patents that one or more of our product candidates may infringe. There could also be existing patents of which we are not aware that one or more of our product candidates may infringe, even if only inadvertently.

Even if resolved in our favor, litigation or other legal proceedings relating to intellectual property claims may cause us to incur significant expenses and could distract our technical and management personnel from their normal responsibilities. In addition, there could be public announcements of the results of hearings, motions or other interim proceedings or developments and if securities analysts or investors perceive these results to be negative, it could have a substantial adverse effect on the price of our common stock. Such litigation or proceedings could substantially increase our operating losses and reduce the resources available for development activities or any future sales, marketing or distribution activities. We may not have sufficient financial or other resources to conduct such litigation or proceedings adequately. Some of our competitors may be able to sustain the costs of such litigation or proceedings more effectively than we can because of their greater financial resources. Uncertainties resulting from the initiation and continuation of patent litigation or other proceedings could compromise our ability to compete in the marketplace.

There is a substantial amount of litigation involving patent and other intellectual property rights in the biotechnology and biopharmaceutical industries generally. If a third-party claims that we infringe their patents or misappropriated their technology, we could face a number of issues, including:

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infringement and other intellectual property claims which, with or without merit, can be expensive and time consuming to litigate and can divert management’s attention from our core business;

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substantial damages for past infringement which we may have to pay if a court decides that our product infringes a competitor’s patent;

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a court prohibiting us from selling or licensing our product unless the patent holder licenses the patent to us, which it would not be required to do;

●

if a license is available from a patent holder, we may have to pay substantial royalties or grant cross licenses to our patents; and

●

redesigning our processes so they do not infringe, which may not be possible or could require substantial funds, time, and may result in an inferior or less-desirable process or product.

If we fail to comply with our obligations under our intellectual property licenses and third-party funding arrangements, we could lose rights that are important to our business.

We have in-licensed the rights to all of our product candidates from third parties. Any disputes between us and any of our licensors regarding our rights under our license agreements may impact our ability to develop and commercialize these product candidates. Any uncured, material breach under any of our license agreements could result in our loss of exclusive rights to one or more of our product candidates and may lead to a complete termination of our related product development efforts.

We are currently a party to license agreements with Dana-Farber, Adimab, NeuPharma and Jubilant. In the future, we may become party to additional licenses that are important for product development and commercialization. If we fail to comply with our obligations under current or future license and funding agreements, our counterparties may have the right to terminate these agreements, in which event

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we might not be able to develop, manufacture or market any product or utilize any technology that is covered by these agreements or may face other penalties under the agreements. Such an occurrence could materially and adversely affect the value of a product candidate being developed under any such agreement or could restrict our drug discovery activities. Termination of these agreements or reduction or elimination of our rights under these agreements may result in our having to negotiate new or reinstated agreements with less favorable terms, or cause us to lose our rights under these agreements, including our rights to important intellectual property or technology.

We may be subject to claims that our employees have wrongfully used or disclosed alleged trade secrets of their former employers.

As is common in the biotechnology and pharmaceutical industry, we employ individuals who were previously employed at other biotechnology or pharmaceutical companies, including our competitors or potential competitors. Although no claims against us are currently pending, we may be subject to claims that we or these employees have inadvertently or otherwise used or disclosed trade secrets or other proprietary information of their former employers. Even if frivolous or unsubstantiated in nature, litigation may be necessary to defend against these claims. Even if we are successful in defending against these claims, litigation could result in substantial costs and be a distraction to management and the implicated employee(s).

If we are unable to protect the confidentiality of our trade secrets, our business and competitive position would be harmed.

In addition to seeking patent protection for our product candidates or any future product candidate, we also rely on trade secrets, including unpatented know-how, technology and other proprietary information, to maintain our competitive position, particularly where we do not believe patent protection is appropriate or obtainable. However, trade secrets are difficult to protect. We limit disclosure of such trade secrets where possible but we also seek to protect these trade secrets, in part, by entering into non-disclosure and confidentiality agreements with parties who do have access to them, such as our employees, our licensors, corporate collaborators, outside scientific collaborators, contract manufacturers, consultants, advisors and other third parties. We also enter into confidentiality and invention or patent assignment agreements with our employees and consultants. Despite these efforts, any of these parties may breach the agreements and may unintentionally or willfully disclose our proprietary information, including our trade secrets, and we may not be able to obtain adequate remedies for such breaches. Enforcing a claim that a party illegally disclosed or misappropriated a trade secret is difficult, expensive and time-consuming, and the outcome is unpredictable. In addition, some courts inside and outside the United States are less willing or unwilling to protect trade secrets. Moreover, if any of our trade secrets were to be lawfully obtained or independently developed by a competitor, we would have no right to prevent them, or those to whom they communicate it, from using that technology or information to compete with us. If any of our trade secrets were to be disclosed to or independently developed by a competitor, our competitive position would be harmed.

Risks Relating to Our Platform and Data

Our business and operations would suffer in the event of computer system failures, cyber-attacks, or deficiencies in our or third parties’ cybersecurity.

We are increasingly dependent upon information technology systems, infrastructure, and data to operate our business. In the ordinary course of business, we collect, store, and transmit confidential information, including, but not limited to, information related to our intellectual property and proprietary business information, personal information, and other confidential information. It is critical that we maintain such confidential information in a manner that preserves its confidentiality and integrity. Furthermore, we have outsourced elements of our operations to third party vendors, who each have access to our confidential information, which increases our disclosure risk.

Although we have implemented internal security and business continuity measures and have developed an information technology infrastructure, our internal computer systems, as well as those of current and future third parties on which we rely, are vulnerable to damage from computer viruses and unauthorized access and may fail. Our information technology and other internal infrastructure systems, including corporate firewalls, servers, data center facilities, lab equipment, and internet connection, face the risk of breakdown or other damage or interruption from service interruptions, system malfunctions, natural disasters, terrorism, war, and telecommunication and electrical failures, as well as security breaches from inadvertent or intentional actions by our employees, contractors, consultants, business partners, and/or other third parties, or from cyber-attacks by malicious third parties (including the deployment of harmful malware, ransomware, denial-of-service attacks, social engineering and other means to affect service reliability and threaten the confidentiality, integrity and availability of information), each of which could compromise our system infrastructure or lead to the loss, destruction, alteration, disclosure, or dissemination of, or damage or unauthorized access to, our data or data that is processed or maintained on our behalf, or other assets.

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In addition, the loss or corruption of, or other damage to, clinical trial data from completed or future clinical trials could result in delays in our regulatory approval efforts and could significantly increase our costs to recover or reproduce the data. Likewise, we will rely on third parties for the manufacture of our current or future drug candidates and to conduct clinical trials, and similar events relating to their systems and operations could also have a material adverse effect on our business and lead to regulatory agency actions. The risk of a security breach or disruption, particularly through cyber-attacks or cyber intrusion, including by computer hackers, foreign governments, and cyber terrorists, has generally increased as the number, intensity, and sophistication of attempted attacks and intrusions from around the world have increased.

Sophisticated cyber attackers (including foreign adversaries engaged in industrial espionage) are skilled at adapting to existing security technology and developing new methods of gaining access to organizations’ sensitive business data, which could result in the loss of proprietary information, including trade secrets. We may be unable to anticipate all types of security threats and to implement preventive measures effective against all such security threats. The techniques used by cyber criminals change frequently, may not be recognized until launched, and can originate from a wide variety of sources, including outside groups such as external service providers, organized crime affiliates, terrorist organizations, or hostile foreign governments or agencies.

Any security breach or other event leading to the loss or damage to, or unauthorized access, use, alteration, disclosure, or dissemination of, personal information, including personal information regarding clinical trial subjects, contractors, directors, or employees, our intellectual property, proprietary business information, or other confidential or proprietary information, could directly harm our reputation, enable competitors to compete with us more effectively, compel us to comply with federal and/or state breach notification laws and foreign law equivalents, subject us to mandatory corrective action, or otherwise subject us to liability under laws and regulations that protect the privacy and security of personal information.

Each of the foregoing could result in significant legal and financial exposure and reputational damage that could adversely affect our business. Notifications and follow-up actions related to a security incident could impact our reputation or cause us to incur substantial costs, including legal and remediation costs, in connection with these measures and otherwise in connection with any actual or suspected security breach. Our efforts to detect and prevent security incidents and otherwise implement our internal security and business continuity measures, including those connected with any actual, potential, or anticipated attack, may cause us to incur significant cost, including those connected with the engagement of additional personnel (including third-party experts and consultants), employment protection technologies, and employee training.

The costs related to significant security breaches or disruptions could be material and our insurance policies may not be adequate to compensate us for the potential losses arising from any such disruption in, or failure or security breach of, our systems or third-party systems where information important to our business operations or commercial development is stored or processed. In addition, such insurance may not be available to us in the future on economically reasonable terms, or at all. Further, our insurance may not cover all claims made against us and could have high deductibles in any event, and defending a suit, regardless of its merit, could be costly and divert management attention. Furthermore, if the information technology systems of our third-party vendors and other contractors and consultants become subject to disruptions or security breaches, we may have insufficient recourse against such third parties and we may have to expend significant resources to mitigate the impact of such an event, and to develop and implement protections to prevent future events of this nature from occurring.

The occurrence of such a cybersecurity breach could result in interruptions in our operations, material disruption of our development programs or our business operations, and may cause us financial, legal, business, or reputational harm.

Risks Relating to Our Control by Fortress Biotech Inc.

Fortress controls a voting majority of our common stock.

Pursuant to the terms of the Class A common stock held by Fortress, Fortress is entitled to cast, for each share of Class A common stock held by Fortress, the number of votes that is equal to one and one-tenth (1.1) times a fraction, the numerator of which is the sum of the shares of outstanding common stock and the denominator of which is the number of shares of outstanding Class A common stock. Accordingly, as long as Fortress owns any shares of Class A common stock, they will be able to control or significantly influence all matters requiring approval by our stockholders, including the election of directors and the approval of mergers or other business combination transactions. The interests of Fortress may not always coincide with the interests of other stockholders, and Fortress may take actions that advance its own interests and are contrary to the desires of our other stockholders. Moreover, this concentration of voting power may delay, prevent or deter a change in control of us even when such a change may be in the best interests of all

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stockholders, could deprive our stockholders of an opportunity to receive a premium for their common stock as part of a sale of Checkpoint or our assets, and might affect the prevailing market price of our common stock.

Fortress has the right to receive a significant grant of shares of our common stock annually which will result in the dilution of your holdings of common stock upon each grant, which could reduce their value.

Under the terms of the Founders Agreement, which became effective as of March 17, 2015 and was amended and restated on July 11, 2016, Fortress has the right to receive an annual grant of shares of our common stock equal to 2.5% of the fully diluted outstanding equity at the time of issuance on January 1 of each year. This annual issuance of shares to Fortress will dilute your holdings in our common stock and, if the value of Checkpoint has not grown over the prior year, would result in a reduction in the value of your shares.

We might have received better terms from unaffiliated third parties than the terms we receive in our agreements with Fortress.

The agreements we entered into with Fortress in connection with the separation include a Management Services Agreement and the Founders Agreement. While we believe the terms of these agreements are reasonable, they might not reflect terms that would have resulted from arm’s-length negotiations between unaffiliated third parties. The terms of the agreements relate to, among other things, payment of a royalty on product sales and the provision of employment and transition services. We might have received better terms from third parties because, among other things, third parties might have competed with each other to win our business.

Risks Related to Conflicts of Interest

The Chairman of our Board of Directors is also the Executive Chairman, President and Chief Executive Officer of TGTX, with whom we previously had a collaboration agreement and a sublicense agreement. As a result, during the terms of these agreements, certain conflicts of interest could have arisen which would have required the attention of our officers and independent directors who are unaffiliated with TGTX.

In connection with our license agreement with Dana-Farber and Adimab, we entered into a collaboration agreement with TGTX to develop and commercialize the anti-PD-L1 and anti-GITR antibody research programs, including cosibelimab in the field of hematological malignancies. In connection with our license agreement with Jubilant, we entered into a sublicense agreement with TGTX to develop and commercialize the Jubilant family of patents covering compounds that inhibit BET proteins such as BRD4, including CK-103, in the field of hematological malignancies. Michael S. Weiss, our Chairman of the Board of Directors, is also the Executive Chairman, President and Chief Executive Officer of TGTX.

Effective September 30, 2023, the Company and TGTX agreed to mutually terminate these collaborations.

The dual roles of our directors who also serve in similar roles with Fortress could create a conflict of interest and will require careful monitoring by our independent directors.

We share some directors with Fortress which could create conflicts of interest between the two companies in the future. While we believe that the Founders Agreement and the Management Services Agreement were negotiated by independent parties on both sides on arm’s length terms, and the fiduciary duties of both parties were thereby satisfied, in the future situations may arise under the operation of both agreements that may create a conflict of interest. We will have to be diligent to ensure that any such situation is resolved by independent parties. In particular, under the Management Services Agreement, Fortress and its affiliates are free to pursue opportunities which could potentially be of interest to Checkpoint, and they are not required to notify Checkpoint prior to pursuing the opportunity. Any such conflict of interest or pursuit by Fortress of a corporate opportunity independent of Checkpoint could expose us to claims by our investors and creditors and could harm our results of operations.

General Risks

Major public health issues, and specifically the pandemic caused by the spread of COVID-19, could have an adverse impact on our financial condition and results of operations and other aspects of our business.

On March 11, 2020, the World Health Organization declared that the rapidly spreading COVID-19 outbreak had evolved into a pandemic.

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The COVID-19 pandemic negatively impacted the global economy, disrupted global supply chains, and created significant volatility and disruption of financial markets. Although COVID-19 has not had a material adverse effect on our business to date, if the coronavirus were to worsen, our business operations could be delayed or interrupted. For instance, our clinical trials may be affected by the pandemic. Site initiation, participant recruitment and enrollment, participant dosing, distribution of clinical trial materials, study monitoring and data analysis may be paused or delayed due to changes in hospital or university policies, federal, state or local regulations, prioritization of hospital resources toward pandemic efforts, or other reasons related to the pandemic. If the coronavirus continues to spread, or if new variants emerge, some participants and clinical investigators may not be able to comply with clinical trial protocols.

We currently rely on third parties, such as contract laboratories, contract research organizations, medical institutions and clinical investigators to conduct these studies and clinical trials. If these third parties themselves are adversely impacted by restrictions resulting from the coronavirus outbreak, we will likely experience delays and/or realize additional costs. We also rely on third parties for the manufacture of our product candidates for preclinical and clinical testing. Disruptions to the global supply chain could impact our or our third-party manufacturers’ ability to obtain raw materials or other products necessary to manufacture and distribute our product candidates. As a result, our efforts to obtain regulatory approvals for, and to commercialize, our product candidates may be delayed or disrupted.

We may not be able to manage our business effectively if we are unable to attract and retain key personnel.

We may not be able to attract and/or retain qualified management and commercial, scientific and clinical personnel in the future due to the intense competition for qualified personnel among biotechnology, pharmaceutical and other businesses. If we are not able to attract and retain necessary personnel to accomplish our business objectives, we may experience constraints that will significantly impede the achievement of our development objectives, our ability to raise additional capital and our ability to implement our business strategy.

Our employees or third-party contractors may engage in misconduct or other improper activities, including noncompliance with regulatory standards and requirements, which could have a material adverse effect on our business.

We are exposed to the risk of employee fraud or other misconduct. Misconduct by employees or third-party contractors could include intentional failures to comply with FDA regulations, provide accurate information to the FDA, comply with manufacturing standards we have established, comply with federal and state health-care fraud and abuse laws and regulations, report financial information or data accurately or disclose unauthorized activities to us. In particular, sales, marketing and business arrangements in the healthcare industry are subject to extensive laws and regulations intended to prevent fraud, kickbacks, bribery, self-dealing and other abusive practices. These laws and regulations may restrict or prohibit a wide range of pricing, discounting, marketing and promotion, sales commission, customer incentive programs and other business arrangements. Employee or third-party contractors misconduct could also involve the improper use of information obtained in the course of clinical trials, which could result in regulatory sanctions and serious harm to our reputation, as well as civil and criminal liability. The precautions we take to detect and prevent this activity may not be effective in controlling unknown or unmanaged risks or losses or in protecting us from governmental investigations or other actions or lawsuits stemming from a failure to be in compliance with such laws or regulations. If any such actions are instituted against us, and we are not successful in defending ourselves or asserting our rights, those actions could have a significant impact on our business and results of operations, including the imposition of significant fines and/or other civil and/or criminal sanctions.

If we fail to comply with environmental, health and safety laws and regulations, we could become subject to fines or penalties or incur costs that could harm our business.

We are subject to numerous environmental, health and safety laws and regulations, including those governing laboratory procedures and the handling, use, storage, treatment and disposal of hazardous materials and wastes. Our operations involve the use of hazardous and flammable materials, including chemicals and biological materials. Our operations also produce hazardous waste products. We generally contract with third parties for the disposal of these materials and wastes. We cannot eliminate the risk of contamination or injury from these materials. Although we believe that the safety procedures for handling and disposing of these materials comply with the standards prescribed by these laws and regulations, we cannot eliminate the risk of accidental contamination or injury from these materials. In the event of contamination or injury resulting from our use of hazardous materials, we could be held liable for any resulting damages, and any liability could exceed our resources. We also could incur significant costs associated with civil or criminal fines and penalties for failure to comply with such laws and regulations.

Although we maintain workers’ compensation insurance to cover us for costs and expenses we may incur due to injuries to our employees resulting from the use of hazardous materials, this insurance may not provide adequate coverage against potential liabilities. We do not

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maintain insurance for environmental liability or toxic tort claims that may be asserted against us in connection with our storage or disposal of biological, hazardous or radioactive materials.

In addition, we may incur substantial costs in order to comply with current or future environmental, health and safety laws and regulations. These current or future laws and regulations may impair our research, development or production efforts. Our failure to comply with these laws and regulations also may result in substantial fines, penalties or other sanctions.

Our business and operations would suffer in the event of system failures.

Despite the implementation of security measures, our internal computer systems are vulnerable to damage from computer viruses, unauthorized access, natural disasters, terrorism, war and telecommunication and electrical failures. Any system failure, accident or security breach that causes interruptions in our operations could result in a material disruption of our drug development programs. For example, the loss of clinical trial data from completed clinical trials for one or more of our product conducts could result in delays in our regulatory approval efforts and significantly increase our costs to recover or reproduce the data. To the extent that any disruption or security breach results in a loss or damage to our data or applications, or inappropriate disclosure of confidential or proprietary information, we may incur liability and the further development of one or more of our product candidates may be delayed.

The market price and trading volume of our common stock has been volatile. Our stock may continue to be subject to substantial price and volume fluctuations due to a number of factors, many of which are beyond our control and may prevent our stockholders from reselling our common stock at a profit.

The market prices for securities of biotechnology and pharmaceutical companies have historically been highly volatile, and the market has from time to time experienced significant price and volume fluctuations that are unrelated to the operating performance of particular companies.

The market price and trading volume of our common stock has been highly volatile and is likely to continue to be highly volatile and may fluctuate substantially due to many factors, including:

●

announcements relating to the clinical development of our product candidates;

●

announcements concerning the progress of our efforts to obtain regulatory approval for and commercialize our product candidates or any future product candidate, including any requests we receive from the FDA, or comparable regulatory authorities outside the United States, for additional studies or data that result in delays or additional costs in obtaining regulatory approval or launching these product candidates, if approved;

●

the depth and liquidity of the market for our common stock;

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investor perceptions about us and our business;

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market conditions in the pharmaceutical and biotechnology sectors or the economy as a whole, which may be impacted by economic or other crises or external factors, including the effects of the COVID-19 pandemic on the global economy;

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price and volume fluctuations in the overall stock market;

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the failure of one or more of our product candidates or any future product candidate, if approved, to achieve commercial success;

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announcements of the introduction of new products by us or our competitors;

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developments concerning product development results or intellectual property rights of others;

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litigation or public concern about the safety of our potential products;

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actual fluctuations in our quarterly operating results, and concerns by investors that such fluctuations may occur in the future;

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deviations in our operating results from the estimates of securities analysts or other analyst comments;

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additions or departures of key personnel;

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health care reform legislation, including measures directed at controlling the pricing of pharmaceutical products, and third-party coverage and reimbursement policies;

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developments concerning current or future strategic collaborations; and

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discussion of us or our stock price by the financial and scientific press and in online investor communities.

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We may become involved in securities class action litigation that could divert management’s attention and harm our business.

The market price and trading volume of our common stock has been highly volatile and is likely to continue to be highly volatile. In addition, the stock markets have from time to time experienced significant price and volume fluctuations that have affected the market prices for the common stock of biotechnology and pharmaceutical companies. These broad market fluctuations may cause the market price of our stock to decline. In the past, following periods of volatility in the market price of a company’s securities, securities class action litigation has often been instituted. A securities class action suit against us could result in potential liabilities, substantial costs, and the diversion of our management’s attention and resources, regardless of the outcome. See Part 2, Item I, Legal Proceedings.

Item 2. Recent Sales of Unregistered Securities.

We have not furnished information under this item to the extent that such information previously has been included in our Annual Report on Form 10-K or in a Current Report on Form 8-K.

Item 3.Defaults Upon Senior Securities.

None.

Item 4.Mine Safety Disclosures.

Not applicable.

Item 5.Other Information.

None.

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Item 6. Exhibits

Exhibit No.		Description
10.1		Amended and Restarted Non-Employee Directors Compensation Plan.* #

31.1		Certification of Principal Executive Officer of Checkpoint Therapeutics, Inc. pursuant to Rule 13a-14(a)/15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, dated May 10, 2024.*

31.2		Certification of Principal Financial Officer of Checkpoint Therapeutics, Inc. pursuant to Rule 13a-14(a)/15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, dated May 10, 2024.*

32.1		Certification of Principal Executive Officer of Checkpoint Therapeutics, Inc. pursuant to 18 U.S.C. §1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, dated May 10, 2024.*

32.2		Certification of Principal Financial Officer of Checkpoint Therapeutics, Inc. pursuant to 18 U.S.C. §1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, dated May 10, 2024.*

101		The following financial information from the Company’s Quarterly Report on Form 10-Q for the period ended March 31, 2024, formatted in Extensible Business Reporting Language (XBRL): (i) the Condensed Consolidated Balance Sheets, (ii) the Condensed Consolidated Statements of Operations, (iii) the Condensed Consolidated Statement of Stockholders’ Equity, (iv) the Condensed Consolidated Statements of Cash Flows, and (v) Notes to the Condensed Consolidated Financial Statements (filed herewith).

104		Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101).

*	Filed herewith.

#	Management Compensation Arrangement.

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SIGNATURES

Pursuant to the requirements of the Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	Checkpoint Therapeutics, Inc.
	(Registrant)
Date : May 10, 2024	By:	/s/ James F. Oliviero
	James F. Oliviero
	President and Chief Executive Officer
	(Principal Executive Officer)

Exhibit 10.1

AMENDED & RESTATED CHECKPOINT THERAPEUTICS, INC.

NON-EMPLOYEE DIRECTORS COMPENSATION PLAN

AMENDED & RESTATED CHECKPOINT THERAPEUTICS, INC.

NON-EMPLOYEE DIRECTORS COMPENSATION PLAN

ARTICLE 1

PURPOSE

1.1.PURPOSE. The purpose of the Amended and Restated Checkpoint Therapeutics, Inc. Non-Employee Directors Compensation Plan is to attract, retain and compensate highly-qualified individuals who are not employees of Checkpoint Therapeutics, Inc. for service as members of the Board by providing them with competitive compensation and an opportunity to participate in the Company’s future growth through the granting of stock-based incentive awards. The Company intends that the Plan will benefit the Company and its stockholders by allowing Non-Employee Directors to have a personal financial stake in the Company through an ownership interest in the Stock and will closely associate the interests of Non-Employee Directors with that of the Company’s stockholders.

1.2.ELIGIBILITY. All Non-Employee Directors shall automatically be participants in the Plan.

ARTICLE 2

DEFINITIONS

2.1.DEFINITIONS. Capitalized terms used herein and not otherwise defined shall have the meanings given such terms in the LTIP. Unless the context clearly indicates otherwise, the following terms shall have the following meanings:

(a)

“Annual Equity Award” means stock options, stock awards, restricted stock, restricted stock units, stock appreciation rights, or other awards based on or derived from the Stock which are authorized under this Plan for award to Non-Employee Directors under Section 6.3 of the Plan.

(b)

“Award” means any Initial Equity Award, Five-Year Anniversary Equity Award or Annual Equity Award granted to a Non-Employee Director under Article 6 of the Plan.

(c)

“Basic Cash Retainer” means the annual cash retainer (excluding any Supplemental Cash Retainer, Meeting Fees and expenses) payable by the Company to a Non-Employee Director pursuant to Section 5.1 hereof for service as a director of the Company, as established from time to time by the Board and set forth in Schedule I hereto.

(d)

“Company” means Checkpoint Therapeutics, Inc., a Delaware corporation.

(e)

“Five-Year Anniversary Equity Award” means stock options, stock awards, restricted stock, restricted stock units, stock appreciation rights, or other awards based on or derived from the Stock which are authorized under this Plan for award to Non-Employee Directors under Section 6.2 of the Plan.

(f)

“Initial Equity Award” means stock options, stock awards, restricted stock, restricted stock units, stock appreciation rights, or other awards based on or derived from the Stock which are authorized under this Plan for award to Non-Employee Directors under Section 6.1 of the Plan.

(g)

“LTIP” means the Checkpoint Therapeutics, Inc. Amended and Restated 2015 Incentive Plan, or any subsequent equity compensation plan approved by the Board and designated as the LTIP for purposes of this Plan.

(h)

“Meeting Fees” means fees for attending a meeting of the Board or one of its Committees as set forth in Section 5.3 hereof.

(i)

“Non-Employee Director” means a director of the Company who is not an employee of the Company and who is not directly compensated by the Company under a separate Board-approved agreement with such director, or a related entity to such director, for service as a director during a Plan Year.

(j)

“Plan” means the Amended and Restated Checkpoint Therapeutics, Inc. Non-Employee Directors Compensation Plan, as further amended from time to time.

(k)

“Plan Year(s)” means the approximate twelve-month periods between annual meetings of the stockholders of the Company.

(l)

“Prior Plan” means the previously-executed Non-Employee Directors Compensation Plan.

(m)

“Supplemental Cash Retainer” means the supplemental annual cash retainer (excluding Basic Cash Retainer, Meeting Fees and expenses) payable by the Company to a Non-Employee Director pursuant to Section 5.2 hereof for service as Chairman of the Board, Lead Director, or chair of a committee of the Board, as established from time to time by the Board and set forth in Schedule I hereto.

ARTICLE 3

ADMINISTRATION

3.1.ADMINISTRATION. The Plan shall be administered by the Board, or, at the discretion of the Board from time to time, the Plan may be administered by a committee of the Board. Subject to the provisions of the Plan, the Board shall be authorized to interpret the Plan, to establish, amend and rescind any rules and regulations relating to the Plan, and to make all other determinations necessary or advisable for the administration of the Plan. The Board’s interpretation of the Plan, and all actions taken and determinations made by the Board pursuant to the powers vested in it hereunder, shall be conclusive and binding upon all parties concerned including the Company, its stockholders and persons granted awards under the Plan. The Board may appoint a plan administrator to carry out the ministerial functions of the Plan, but the administrator shall have no other authority or powers of the Board. To the extent the Board has delegated any authority and responsibility under this Plan to a committee of the Board, such committee shall have the powers and protections of the Board hereunder, and any reference herein to the Board (other than in this Section 4.1) shall include such committee. To the extent any action of the Board under the Plan conflicts with actions taken by such committee, the actions of the Board shall control.

3.2.RELIANCE. In administering the Plan, the Board may rely upon any information furnished by the Company, its public accountants and other experts. No individual will have personal liability by reason of anything done or omitted to be done by the Company or the Board in connection with the Plan.

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3.3.INDEMNIFICATION. Each person who is or has been a member of the Board or who otherwise participates in the administration or operation of the Plan shall be indemnified by the Company against, and held harmless from, any loss, cost, liability or expense that may be imposed upon or incurred by him or her in connection with or resulting from any claim, action, suit or proceeding in which such person may be involved by reason of any action taken or failure to act under the Plan and shall be fully reimbursed by the Company for any and all amounts paid by such person in satisfaction of judgment against him or her in any such action, suit or proceeding, provided he or she will give the Company an opportunity, by written notice to the Board, to defend the same at the Company’s own expense before he or she undertakes to defend it on his or her own behalf. This right of indemnification shall not be exclusive of any other rights of indemnification.

ARTICLE 4

SHARES

4.1.SOURCE OF SHARES FOR THE PLAN. The Awards and shares of Stock that may be issued pursuant to the Plan shall be issued under the LTIP, subject to all of the terms and conditions of the LTIP, including but not limited to Section 5.1 of the LTIP, which provides that the maximum aggregate number of Shares associated with any Award granted under this Plan in any calendar year to any one Non-Employee Director shall be 100,000 Shares. The terms contained in the LTIP are incorporated into and made a part of this Plan with respect to Awards granted pursuant hereto, and any such Awards shall be governed by and construed in accordance with the LTIP. In the event of any actual or alleged conflict between the provisions of the LTIP and the provisions of this Plan, the provisions of the LTIP shall be controlling and determinative. The Plan is considered to be and shall be operated as a subplan of the LTIP, and does not constitute a separate source of shares for the grant of the Awards provided herein.

ARTICLE 5

CASH COMPENSATION

5.1.BASIC CASH RETAINER. Each Non-Employee Director shall be paid a Basic Cash Retainer for service as a director during each Plan Year, payable in advance, on the first business day following each annual meeting of stockholders. The amount of the Basic Cash Retainer shall be established from time to time by the Board. The amount of the Basic Cash Retainer is set forth in Schedule I, as amended from time to time by the Board. Each person who first becomes an Non-Employee Director on a date other than an annual meeting date shall be paid a pro rata amount of the Basic Cash Retainer for that Plan Year to reflect the actual number of days served in the Plan Year.

5.2.SUPPLEMENTAL CASH RETAINER. The Chairman of the Board, Lead Director, and chairs of each committee of the Board may be paid a Supplemental Cash Retainer during a Plan Year, payable at the same times as installments of the Basic Cash Retainer are paid. The amount of the Supplemental Cash Retainers shall be established from time to time by the Board, and shall be set forth in Schedule I, as amended from time to time by the Board. A pro rata Supplemental Cash Retainer will be paid to any Non-Employee Director who is elected by the Board to a position eligible for a Supplemental Cash Retainer on a date other than the beginning of a Plan Year, to reflect the actual number of days served in such eligible capacity during the Plan Year.

5.3.MEETING FEES. Each Non-Employee Director may be paid a fee for each meeting of the Board or committee thereof in which he or she participates. The amount of the fees, if any, shall be established from time to time by the Board and shall be set forth in Schedule I, as amended from time to time by the Board. For purposes of this provision, casual or unscheduled conferences among directors shall not constitute an official meeting.

– 3 –

5.4.EXPENSE REIMBURSEMENT. All Non-Employee Directors shall be reimbursed for reasonable travel and out-of-pocket expenses in connection with attendance at meetings of the Board and its committees, or other Company functions at which the Chief Executive Officer, Chairman of the Board, or Lead Director requests the director to participate.

ARTICLE 6

EQUITY AWARDS

6.1INITIAL EQUITY AWARD. Subject to share availability under the LTIP, on the first date a Non-Employee Director is initially elected or appointed to the Board, he or she shall be granted an Initial Equity Award. The Initial Equity Award is set forth in Schedule I, as amended from time to time by the Board. Such Initial Equity Award shall be subject to the terms and restrictions described in Schedule I and below in this Article 6.

6.2FIVE-YEAR ANNIVERSARY EQUITY AWARD. Subject to share availability under the LTIP, on the day following the annual meeting of the Company’s stockholders immediately following each five-year period of continuous service as a Non-Employee Director, each Non-Employee Director serving as such on that date shall be granted a Five-Year Anniversary Equity Award. The Five-Year Anniversary Equity Award is set forth in Schedule I, as amended from time to time by the Board. Such Five-Year Anniversary Equity Award shall be subject to the terms and restrictions described in Schedule I and below in this Article 6. Any Non-Employee Director having served in such capacity for five or more years as of the Effective Date of this Amendment to the Plan shall be deemed having achieved their first Five-Year Anniversary Equity Award on the Effective Date.

6.3ANNUAL EQUITY AWARD. Subject to share availability under the LTIP, on the day following each annual meeting of the Company’s stockholders, each Non-Employee Director serving as such on that date (other than a director who first became a Non-Employee Director at the stockholders meeting held on the previous day) shall be granted an Annual Equity Award. The Annual Equity Award is set forth in Schedule I, as amended from time to time by the Board. Such Annual Equity Award shall be subject to the terms and restrictions described in Schedule I and below in this Article 6.

6.4TERMS AND CONDITIONS OF AWARDS. Awards granted under this Article 6 shall be subject to the terms and conditions described below and in the LTIP.

(a)

Vesting. Each Award granted under this Plan shall vest as provided in Schedule I, as amended from time to time by the Board; provided, however, that each Award shall become fully vested upon the occurrence of a Change of Control.

(b)

Effect of Termination of Directorship. Upon termination of a Non-Employee Director’s membership on the Board for any reason (including without limitation, by reason of death, Disability, retirement or failure to be re-nominated or re-elected as a director), the Non-Employee Director shall forfeit all of his or her right, title and interest in and to any unvested portion of the Initial Equity Award, Five-Year Anniversary Equity Award or Annual Equity Award, as the case may be.

(c)

Award Certificates. All Awards shall be evidenced by a written Award Certificate between the Company and the Non-Employee Director, which shall include such provisions, not inconsistent with the Plan or the LTIP, as may be specified by the Board.

– 4 –

6.5ADJUSTMENTS. The adjustment provisions of the LTIP shall apply with respect to Awards granted pursuant to this Plan. Without limiting the foregoing, in the event of a subdivision of the outstanding Stock (stock-split), a declaration of a dividend payable in shares of Stock, or a combination or consolidation of the outstanding Stock into a lesser number of shares of Stock, the number of Awards to be granted to Non-Employee Directors in accordance with Article 6 hereof shall be adjusted proportionately and the shares of Stock then subject to each Award shall automatically be adjusted proportionately without any change in the aggregate purchase price therefore.

ARTICLE 7

AMENDMENT, MODIFICATION AND TERMINATION

7.1.AMENDMENT, MODIFICATION AND TERMINATION. The Board may, at any time and from time to time, amend, modify or terminate the Plan without stockholder approval; provided, however, that if an amendment to the Plan would, in the reasonable opinion of the Board, require stockholder approval under applicable laws, policies or regulations or the applicable listing or other requirements of a securities exchange on which the Stock is listed or traded, then such amendment shall be subject to stockholder approval; and provided further, that the Board may condition any other amendment or modification on the approval of stockholders of the Company for any reason. This Plan amends, restates, supersedes and replaces in its entirety the Prior Plan.

ARTICLE 8

GENERAL PROVISIONS

8.1.EXPENSES OF THE PLAN. The expenses of administering the Plan shall be borne by the Company.

8.2.EFFECTIVE DATE AND DURATION OF THE PLAN. The Plan shall be effective as of the date it is approved by the Board. The Plan shall remain in effect until terminated by the Board.

	CHECKPOINT THERAPEUTICS, INC.

	By:	/s/ James F. Oliviero
	Name:	James F. Oliviero
	Title:	President & CEO

– 5 –

SCHEDULE I

Effective as of March 21, 2024

The following shall remain in effect until changed by the Board:

Basic Cash Retainer:		$50,000, paid quarterly in advance ($12,500 per quarter).
Supplemental Cash Retainer for Audit Chair:		$10,000, paid quarterly in advance ($2,500 per quarter).
Initial Equity Award:		50,000 shares of Restricted Stock, which shares shall vest and become non-forfeitable in equal annual installments over three years, beginning on the third (3^rd) anniversary of the Grant Date, subject to the Non-Employee Director’s continued service on the Board on such date.
Five-Year Anniversary Equity Award:		50,000 shares of Restricted Stock, which shares shall vest and become non-forfeitable in equal annual installments over three years, beginning on the third (3^rd) anniversary of the Grant Date, subject to the Non-Employee Director’s continued service on the Board on such date.
Annual Equity Award:		The greater of (i) a number of shares of Restricted Stock having a fair market value on the Grant Date of $50,000, or (ii) 10,000 shares of Restricted Stock, which shares shall vest and become non-forfeitable on the third (3^rd) anniversary of the Grant Date, subject to the Non-Employee Director’s continued service on the Board on such date.

– 6 –

Exhibit 31.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER PURSUANT TO RULES 13A-14(A)

AND 15D-14(A) UNDER THE SECURITIES EXCHANGE ACT OF 1934,

AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, James F. Oliviero, certify that:

1. I have reviewed this report on Form 10-Q of Checkpoint Therapeutics, Inc;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

		/s/ James F. Oliviero
		James F. Oliviero
		President and Chief Executive Officer
		(Principal Executive Officer)
		May 10, 2024

Exhibit 31.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER PURSUANT TO RULES 13A-14(A)

AND 15D-14(A) UNDER THE SECURITIES EXCHANGE ACT OF 1934,

AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Garrett Gray, certify that:

1. I have reviewed this report on Form 10-Q of Checkpoint Therapeutics, Inc;

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

		/s/ Garrett Gray
		Garrett Gray
		Chief Financial Officer
		(Principal Financial Officer)
		May 10, 2024

Exhibit 32.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, James F. Oliviero, Chief Executive Officer of Checkpoint Therapeutics, Inc. (the “Company”), in compliance with 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, hereby certify that, to the best of my knowledge, the Company’s Quarterly Report on Form 10-Q for the period ended March 31, 2024 (the “Report”) filed with the Securities and Exchange Commission:

· Fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

· The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

		/s/ James F. Oliviero
		James F. Oliviero
		President and Chief Executive Officer
		(Principal Executive Officer)
		May 10, 2024

Exhibit 32.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER

PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Garrett Gray, Chief Financial Officer of Checkpoint Therapeutics, Inc. (the “Company”), in compliance with 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, hereby certify that, to the best of my knowledge, the Company’s Quarterly Report on Form 10-Q for the period ended March 31, 2024 (the “Report”) filed with the Securities and Exchange Commission:

· Fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

· The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

		/s/ Garrett Gray
		Garrett Gray
		Chief Financial Officer
		(Principal Financial Officer)
		May 10, 2024

Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2024	May 07, 2024
Document and Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2024
Document Transition Report	false
Entity File Number	001-38128
Entity Registrant Name	CHECKPOINT THERAPEUTICS, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	47-2568632
Entity Address, Address Line One	95 Sawyer Road
Entity Address, Address Line Two	Suite 110
Entity Address, City or Town	Waltham
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	02453
City Area Code	781
Local Phone Number	652-4500
Title of 12(b) Security	Common Stock, par value $0.0001 per share
Trading Symbol	CKPT
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0001651407
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Amendment Flag	false
Class A Common Stock
Document and Entity Information
Entity Common Stock, Shares Outstanding		700,000
Common Stock
Document and Entity Information
Entity Common Stock, Shares Outstanding		36,150,279

Condensed Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current Assets:
Cash and cash equivalents	$ 11,241	$ 4,928
Prepaid expenses and other current assets	734	450
Total current assets	11,975	5,378
Total Assets	11,975	5,378
Current Liabilities:
Accounts payable and accrued expenses	19,159	15,485
Accounts payable and accrued expenses - related party	2,941	2,815
Common stock warrant liabilities	125	125
Total current liabilities	22,225	18,425
Total Liabilities	22,225	18,425
Commitments and Contingencies (note 5)
Stockholders' Equity (Deficit)
Common stock issuable, 1,492,915 shares as of March 31, 2024 and December 31, 2023	3,419	3,419
Additional paid-in capital	311,605	297,864
Accumulated deficit	(325,278)	(314,333)
Total Stockholders' Equity (Deficit)	(10,250)	(13,047)
Total Liabilities and Stockholders' Equity (Deficit)	11,975	5,378
Common No Class
Stockholders' Equity (Deficit)
Common Stock Value	$ 4	$ 3

Condensed Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2024	Dec. 31, 2023	Jun. 12, 2023
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001	$ 0.0001
Common stock, shares authorized	80,000,000	80,000,000	80,000,000
Common stock, shares issued	34,986,279	27,042,035
Common stock, shares outstanding	34,986,279	27,042,035
Common stock, shares subscribed but unissued	1,492,915	1,492,915
Class A Common Shares
Common stock, shares issued	700,000	700,000
Common stock, shares outstanding	700,000	700,000

Condensed Statements of Operations - USD ($) $ in Thousands	3 Months Ended
Condensed Statements of Operations - USD ($) $ in Thousands	Mar. 31, 2024	Mar. 31, 2023
Condensed Statements of Operations
Revenue - related party		$ 35
Operating expenses:
Research and development	$ 8,497	15,826
General and administrative	2,451	2,292
Total operating expenses	10,948	18,118
Loss from operations	(10,948)	(18,083)
Other income:
Interest income	4	43
Gain on common stock warrant liabilities		7,566
Foreign currency exchange loss	(1)
Total other income	3	7,609
Net Loss	$ (10,945)	$ (10,474)
Loss per Share:
Basic net loss per common share outstanding	$ (0.33)	$ (0.89)
Diluted net loss per common share outstanding	$ (0.33)	$ (0.89)
Basic weighted average number of common shares outstanding	32,930,977	11,749,139
Diluted weighted average number of common shares outstanding	32,930,977	11,749,139

Condensed Statements of Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Common Shares Class A Common Shares	Common Shares	Common Shares Issuable	Additional Paid-in Capital	Accumulated Deficit	Total
Balances at Dec. 31, 2022		$ 1	$ 1,885	$ 241,117	$ (262,486)	$ (19,483)
Balances (in Shares) at Dec. 31, 2022	700,000	9,586,683
Issuance of common shares, net of offering costs - Registered direct offering				6,653		6,653
Issuance of common shares, net of offering costs - Registered direct offering (in Shares)		1,180,000
Issuance of common shares - Founders Agreement			(1,885)	2,041		156
Issuance of common shares - Founders Agreement (in Shares)		404,621
Stock-based compensation expense				969		969
Stock-based compensation expense (in Shares)		996,950
Exercise of pre-funded and common stock warrants, including inducement (in shares)		1,032,816
Net loss					(10,474)	(10,474)
Balances at Mar. 31, 2023		$ 1		250,780	(272,960)	(22,179)
Balances (in Shares) at Mar. 31, 2023	700,000	13,201,070
Balances at Dec. 31, 2023		$ 3	3,419	297,864	(314,333)	(13,047)
Balances (in Shares) at Dec. 31, 2023	700,000	27,042,035
Issuance of common shares, net of offering costs - Registered direct offering		$ 1		12,636		12,637
Issuance of common shares, net of offering costs - Registered direct offering (in Shares)		1,275,000
Issuance of common shares - Founders Agreement				396		396
Issuance of common shares - Founders Agreement (in Shares)		193,905
Stock-based compensation expense				709		709
Stock-based compensation expense (in Shares)		2,680,106
Exercise of pre-funded and common stock warrants, including inducement (in shares)		3,795,233
Net loss					(10,945)	(10,945)
Balances at Mar. 31, 2024		$ 4	$ 3,419	$ 311,605	$ (325,278)	$ (10,250)
Balances (in Shares) at Mar. 31, 2024	700,000	34,986,279

Condensed Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
Condensed Statements of Cash Flows - USD ($) $ in Thousands	Mar. 31, 2024	Mar. 31, 2023
Cash Flows from Operating Activities:
Net loss	$ (10,945)	$ (10,474)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	709	969
Issuance of common shares - Founders Agreement	396	156
Gain on common stock warrant liabilities		(7,566)
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(284)	134
Other receivables - related party		38
Accounts payable and accrued expenses	3,524	2,167
Accounts payable and accrued expenses - related party	126	545
Net cash used in operating activities	(6,474)	(14,031)
Cash Flows from Financing Activities:
Net cash provided by financing activities	12,787	6,809
Net increase (decrease) in cash and cash equivalents	6,313	(7,222)
Cash and cash equivalents at beginning of period	4,928	12,068
Cash and cash equivalents at end of period	11,241	4,846
Supplemental disclosure of noncash investing and financing activities:
Issuance of common shares - Founders Agreement		1,885
Issuance of common shares - Registered direct offering (offering costs incurred but not paid)	150	156
Registered direct offerings
Cash Flows from Financing Activities:
Proceeds from issuance of common shares	14,000	7,500
Payment of offering costs for the issuance of common shares	$ (1,213)	$ (691)

Organization and Description of Business Operations

3 Months Ended

Mar. 31, 2024

Organization and Description of Business Operations

Organization and Description of Business Operations

Note 1 - Organization and Description of Business Operations

The Company is a majority-controlled subsidiary of Fortress Biotech, Inc. (“Fortress”).

The Company’s common stock is listed on the NASDAQ Capital Market and trades under the symbol “CKPT.”

Liquidity, Capital Resources and Going Concern

Significant Accounting Policies

3 Months Ended

Mar. 31, 2024

Significant Accounting Policies

Significant Accounting Policies

Note 2 - Significant Accounting Policies

Basis of Presentation

Use of Estimates

Significant Accounting Policies

There have been no material changes in the Company’s significant accounting policies to those previously disclosed in the 2023 Annual Report on Form 10-K.

Cash and Cash Equivalents

The Company considers highly liquid investments with an original maturity of three months or less when purchased to be cash equivalents.

Research and Development Costs

Annual Equity Fee

Stock-Based Compensation Expenses

Common Stock Warrant Liability

Fair Value Measurement

The accounting guidance requires fair value measurements be classified and disclosed in one of the following three categories:

Level 1:

Quoted prices in active markets for identical assets or liabilities.

Level 2:

Observable inputs other than Level 1 prices, for similar assets or liabilities that are directly or indirectly observable in the marketplace.

Level 3:

Revenue from Contracts with Customers

●

Step 1: Identify the contract with the customer.

●

Step 2: Identify the performance obligations in the contract.

●

Step 3: Determine the transaction price.

●

Step 4: Allocate the transaction price to the performance obligations in the contract.

●

Step 5: Recognize revenue when the company satisfies a performance obligation.

●

If a good or service is not distinct, the good or service is combined with other promised goods or services until a bundle of goods or services is identified that is distinct.

●

variable consideration;

●

constraining estimates of variable consideration;

●

the existence of a significant financing component in the contract;

●

noncash consideration; and

●

consideration payable to a customer.

Revenue for a sales-based or usage-based royalty promised in exchange for a license of intellectual property is recognized only when (or as) the later of the following events occurs:

the subsequent sale or usage occurs; and

the performance obligation to which some or all of the sales-based or usage-based royalty has been allocated has been satisfied (or partially satisfied).

Income Taxes

Net Loss per Share


	March 31,
	2024	2023
Warrants (Note 6)	42,139,278	6,516,211
Stock options (Note 6)	127,000	27,000
Unvested restricted stock awards (Note 6)	3,742,676	1,251,072
Unvested restricted stock units (Note 6)	598,246	619,884
Total	46,607,200	8,414,167

Comprehensive Loss

The Company has no components of comprehensive loss other than net loss. Thus, comprehensive loss is the same as net loss for the periods presented.

Recently Issued Accounting Pronouncements

License Agreements

3 Months Ended

Mar. 31, 2024

License Agreements

License Agreements

Note 3 – License Agreements

Dana-Farber Cancer Institute

Adimab, LLC

NeuPharma, Inc.

Jubilant Biosys Limited

Related Party Agreements

3 Months Ended

Mar. 31, 2024

Related Party Agreements

Related Party Agreements

Note 4 – Related Party Agreements

Founders Agreement and Management Services Agreement with Fortress

Caribe BioAdvisors, LLC

Commitments and Contingencies

3 Months Ended

Mar. 31, 2024

Commitments and Contingencies

Commitments and Contingencies

Note 5 – Commitments and Contingencies

Leases

The Company is not a party to any leases for office space or equipment.

License Agreements

Litigation

Stockholders' Equity

3 Months Ended

Mar. 31, 2024

Stockholders' Equity

Stockholders' Equity

Note 6 – Stockholders’ Equity

Common Stock

Registered Direct Offerings

The November 2020 Form S-3 expired in December 2023.

As of March 31, 2024, approximately $77.7 million of securities remain available for sale under the March 2023 Form S-3.

Warrant Inducement

Shares Issued Under the Founders Agreement

Equity Incentive Plan

As of March 31, 2024, 852,712 shares are available for issuance under the 2015 Incentive Plan.

Restricted Stock Awards


		Weighted Average
	Number of	Grant Date Fair
	Shares	Value
Non-vested at December 31, 2023	1,316,120	$	6.88
Granted	2,704,000		1.99
Forfeited	(23,894)		6.28
Vested	(253,550)		7.72
Non-vested at March 31, 2024	3,742,676	$	3.30

Restricted Stock Units

The following table summarizes restricted stock units activity for the three months ended March 31, 2024:


		Weighted Average
	Number of	Grant Date Fair
	Shares	Value
Non-vested at December 31, 2023	615,884	$	2.77
Forfeited	(17,638)		2.25
Non-vested at March 31, 2024	598,246	$	2.78

Stock Options

The following table summarizes stock option award activity for the three months ended March 31, 2024:


				Weighted Average
				Remaining
		Weighted Average		Contractual Life
	Stock Options	Exercise Price		(in years)
Outstanding as of December 31, 2023	127,000	$	8.88	8.60
Outstanding as of March 31, 2024	127,000	$	8.88	8.35
Vested and exercisable as of March 31, 2024	20,250	$	24.74	5.83

Warrants

A summary of warrant activities for the three months ended March 31, 2024 is presented below:


				Weighted Average
				Remaining
		Weighted Average		Contractual Life
	Warrants	Exercise Price		(in years)
Outstanding as of December 31, 2023	30,097,671	$	2.36	3.00
Granted	14,702,840		0.96
Exercised	(2,661,233)		—
Outstanding as of March 31, 2024	42,139,278	$	2.02	4.07

Upon the exercise of warrants, the Company will issue new shares of its common stock.

Stock-Based Compensation

The following table summarizes stock-based compensation expense for the three months ended March 31, 2024 and 2023 ($ in thousands):


	For the three months ended March 31,
	2024		2023
Research and development	$	490	$	390
General and administrative		220		579
Total stock-based compensation expense	$	709	$	969

Common Stock Warrant Liabilities

3 Months Ended

Mar. 31, 2024

Common Stock Warrant Liabilities

Common Stock Warrant Liabilities

Note 7 – Common Stock Warrant Liabilities


	Common Stock
	Warrant
	Liabilities
Common Stock Warrant liabilities at December 31, 2023	$	125
Change in fair value of Common Stock Warrant liabilities		—
Common Stock Warrant liabilities at March 31, 2024	$	125


	March 31,			December 31,
	2024			2023
Exercise price	$	5.41		$	5.41
Volatility		107.5	%		96.4	%
Expected life		3.7			4.0
Risk-free rate		4.2	%		3.8	%
Dividend yield		—			—

Accounts Payable and Accrued Expenses

3 Months Ended

Mar. 31, 2024

Accounts Payable and Accrued Expenses

Accounts Payable and Accrued Expenses

Note 8 - Accounts Payable and Accrued Expenses

At March 31, 2024 and December 31, 2023, accounts payable and accrued expenses consisted of the following ($ in thousands):


	March 31,		December 31,
	2024		2023
Accounts payable	$	11,923	$	6,570
Accrued compensation		435		1,206
Accrued Research and development		6,218		7,123
Other		583		586
Total accounts payable and accrued expenses	$	19,159	$	15,485

Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2024

Significant Accounting Policies

Basis of Presentation

Use of Estimates

Significant Accounting Policies

There have been no material changes in the Company’s significant accounting policies to those previously disclosed in the 2023 Annual Report on Form 10-K.

Cash and Cash Equivalents

The Company considers highly liquid investments with an original maturity of three months or less when purchased to be cash equivalents.

Research and Development Costs

Annual Equity Fee

Stock-Based Compensation Expenses

Common Stock Warrant Liability

Fair Value Measurement

The accounting guidance requires fair value measurements be classified and disclosed in one of the following three categories:

Level 1:

Quoted prices in active markets for identical assets or liabilities.

Level 2:

Observable inputs other than Level 1 prices, for similar assets or liabilities that are directly or indirectly observable in the marketplace.

Level 3:

Revenue from Contracts with Customers

●

Step 1: Identify the contract with the customer.

●

Step 2: Identify the performance obligations in the contract.

●

Step 3: Determine the transaction price.

●

Step 4: Allocate the transaction price to the performance obligations in the contract.

●

Step 5: Recognize revenue when the company satisfies a performance obligation.

●

If a good or service is not distinct, the good or service is combined with other promised goods or services until a bundle of goods or services is identified that is distinct.

●

variable consideration;

●

constraining estimates of variable consideration;

●

the existence of a significant financing component in the contract;

●

noncash consideration; and

●

consideration payable to a customer.

Revenue for a sales-based or usage-based royalty promised in exchange for a license of intellectual property is recognized only when (or as) the later of the following events occurs:

the subsequent sale or usage occurs; and

the performance obligation to which some or all of the sales-based or usage-based royalty has been allocated has been satisfied (or partially satisfied).

Income Taxes

Net Loss per Share


	March 31,
	2024	2023
Warrants (Note 6)	42,139,278	6,516,211
Stock options (Note 6)	127,000	27,000
Unvested restricted stock awards (Note 6)	3,742,676	1,251,072
Unvested restricted stock units (Note 6)	598,246	619,884
Total	46,607,200	8,414,167

Comprehensive Loss

The Company has no components of comprehensive loss other than net loss. Thus, comprehensive loss is the same as net loss for the periods presented.

Recently Issued Accounting Pronouncements

Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2024

Significant Accounting Policies

Summary of potentially dilutive securities outstanding, that were excluded from the computation of diluted net loss per share, as they would be anti-dilutive


	March 31,
	2024	2023
Warrants (Note 6)	42,139,278	6,516,211
Stock options (Note 6)	127,000	27,000
Unvested restricted stock awards (Note 6)	3,742,676	1,251,072
Unvested restricted stock units (Note 6)	598,246	619,884
Total	46,607,200	8,414,167

Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2024

Stockholders' Equity

Summary of restricted stock award activity


		Weighted Average
	Number of	Grant Date Fair
	Shares	Value
Non-vested at December 31, 2023	1,316,120	$	6.88
Granted	2,704,000		1.99
Forfeited	(23,894)		6.28
Vested	(253,550)		7.72
Non-vested at March 31, 2024	3,742,676	$	3.30

Summary of restricted stock units activity


		Weighted Average
	Number of	Grant Date Fair
	Shares	Value
Non-vested at December 31, 2023	615,884	$	2.77
Forfeited	(17,638)		2.25
Non-vested at March 31, 2024	598,246	$	2.78

Summary of stock option award activity


				Weighted Average
				Remaining
		Weighted Average		Contractual Life
	Stock Options	Exercise Price		(in years)
Outstanding as of December 31, 2023	127,000	$	8.88	8.60
Outstanding as of March 31, 2024	127,000	$	8.88	8.35
Vested and exercisable as of March 31, 2024	20,250	$	24.74	5.83

Summary of warrant activities


				Weighted Average
				Remaining
		Weighted Average		Contractual Life
	Warrants	Exercise Price		(in years)
Outstanding as of December 31, 2023	30,097,671	$	2.36	3.00
Granted	14,702,840		0.96
Exercised	(2,661,233)		—
Outstanding as of March 31, 2024	42,139,278	$	2.02	4.07

Summary of stock-based compensation expense

The following table summarizes stock-based compensation expense for the three months ended March 31, 2024 and 2023 ($ in thousands):


	For the three months ended March 31,
	2024		2023
Research and development	$	490	$	390
General and administrative		220		579
Total stock-based compensation expense	$	709	$	969

Common Stock Warrant Liabilities (Tables)

3 Months Ended

Mar. 31, 2024

Common Stock Warrant Liabilities

Summary of common stock warrant liabilities


	Common Stock
	Warrant
	Liabilities
Common Stock Warrant liabilities at December 31, 2023	$	125
Change in fair value of Common Stock Warrant liabilities		—
Common Stock Warrant liabilities at March 31, 2024	$	125

Summary of the weighted average (in aggregate) significant unobservable inputs used in measuring the warrant liability that are categorized within Level 3 of the fair value hierarchy


	March 31,			December 31,
	2024			2023
Exercise price	$	5.41		$	5.41
Volatility		107.5	%		96.4	%
Expected life		3.7			4.0
Risk-free rate		4.2	%		3.8	%
Dividend yield		—			—

Accounts Payable and Accrued Expenses (Tables)

3 Months Ended

Mar. 31, 2024

Accounts Payable and Accrued Expenses

Schedule of accounts payable and accrued expenses

At March 31, 2024 and December 31, 2023, accounts payable and accrued expenses consisted of the following ($ in thousands):


	March 31,		December 31,
	2024		2023
Accounts payable	$	11,923	$	6,570
Accrued compensation		435		1,206
Accrued Research and development		6,218		7,123
Other		583		586
Total accounts payable and accrued expenses	$	19,159	$	15,485

Organization and Description of Business Operations (Details) - USD ($)	1 Months Ended
	Jan. 31, 2024	Oct. 31, 2023	Jul. 31, 2023	May 31, 2023	Apr. 30, 2023	Feb. 28, 2023	Mar. 31, 2024	Dec. 31, 2023	Nov. 30, 2023	Feb. 22, 2023	Dec. 16, 2022
Organization and Description of Business Operations
Accumulated deficit							$ (325,278,000)	$ (314,333,000)
Number of warrants issued		110,000
Number of warrants issued and sold to purchase shares									6,215,354
Pre-funded warrants
Organization and Description of Business Operations
Class of warrants exercise price	$ 0.0001		$ 0.0001			$ 0.0001
February 2023 Registered Direct Offering
Organization and Description of Business Operations
Number of shares issued and sold						1,180,000
Purchase price per share						$ 5.25
Number of warrants issued						248,572
Class of warrants exercise price		$ 5.00
Total gross proceeds from Issuance of common stock						$ 7,500,000
Net proceeds from offering						6,700,000
Amount of commissions and other transaction costs						$ 800,000
February 2023 Registered Direct Offering \| Pre-funded warrants
Organization and Description of Business Operations
Number of warrants issued						248,572
Class of warrants exercise price						$ 5.2499
February 2023 Registered Direct Offering \| Series A Warrants
Organization and Description of Business Operations
Class of warrants exercise price						$ 5.00
Expiration term of warrants (in years)						5 years
February 2023 Registered Direct Offering \| Series A Warrants \| Maximum
Organization and Description of Business Operations
Number of warrants issued and sold to purchase shares						1,428,572
February 2023 Registered Direct Offering \| Series B Warrants
Organization and Description of Business Operations
Class of warrants exercise price						$ 5.00
Expiration term of warrants (in years)						18 months
February 2023 Registered Direct Offering \| Series B Warrants \| Maximum
Organization and Description of Business Operations
Number of warrants issued and sold to purchase shares						1,428,572
April 2023 Registered Direct Offering
Organization and Description of Business Operations
Number of shares issued and sold					1,700,000
Purchase price per share					$ 3.60
Total gross proceeds from Issuance of common stock					$ 6,100,000
Net proceeds from offering					5,500,000
Amount of commissions and other transaction costs					$ 600,000
April 2023 Registered Direct Offering \| Series A Warrants
Organization and Description of Business Operations
Class of warrants exercise price					$ 3.35
Expiration term of warrants (in years)					5 years
April 2023 Registered Direct Offering \| Series A Warrants \| Maximum
Organization and Description of Business Operations
Number of warrants issued and sold to purchase shares					1,700,000
April 2023 Registered Direct Offering \| Series B Warrants
Organization and Description of Business Operations
Class of warrants exercise price					$ 3.35
Expiration term of warrants (in years)					18 months
April 2023 Registered Direct Offering \| Series B Warrants \| Maximum
Organization and Description of Business Operations
Number of warrants issued and sold to purchase shares					1,700,000
May 2023 Registered Direct Offering
Organization and Description of Business Operations
Number of shares issued and sold				1,650,000
Purchase price per share				$ 3.071
Number of warrants issued				1,606,269
Class of warrants exercise price				$ 3.0709
Total gross proceeds from Issuance of common stock				$ 10,000,000.0
Net proceeds from offering				9,100,000
Amount of commissions and other transaction costs				$ 900,000
May 2023 Registered Direct Offering \| Pre-funded warrants
Organization and Description of Business Operations
Number of warrants issued				1,606,269
Class of warrants exercise price				$ 0.0001
May 2023 Registered Direct Offering \| Series A Warrants
Organization and Description of Business Operations
Class of warrants exercise price				$ 2.821
Expiration term of warrants (in years)				5 years
May 2023 Registered Direct Offering \| Series A Warrants \| Maximum
Organization and Description of Business Operations
Number of warrants issued and sold to purchase shares				3,256,269
May 2023 Registered Direct Offering \| Series B Warrants
Organization and Description of Business Operations
Class of warrants exercise price				$ 2.821
Expiration term of warrants (in years)				18 months
May 2023 Registered Direct Offering \| Series B Warrants \| Maximum
Organization and Description of Business Operations
Number of warrants issued and sold to purchase shares				3,256,269
July 2023 Registered Direct Offering
Organization and Description of Business Operations
Number of shares issued and sold			2,427,186
Purchase price per share			$ 3.09
Total gross proceeds from Issuance of common stock			$ 10,000,000.0
Net proceeds from offering			9,100,000
Amount of commissions and other transaction costs			$ 900,000
July 2023 Registered Direct Offering \| Pre-funded warrants
Organization and Description of Business Operations
Class of warrants exercise price			$ 3.0899
Number of warrants issued and sold to purchase shares			809,062
July 2023 Registered Direct Offering \| Series A Warrants
Organization and Description of Business Operations
Class of warrants exercise price			$ 2.84
Expiration term of warrants (in years)			5 years
July 2023 Registered Direct Offering \| Series A Warrants \| Maximum
Organization and Description of Business Operations
Number of warrants issued and sold to purchase shares			3,236,248
July 2023 Registered Direct Offering \| Series B Warrants
Organization and Description of Business Operations
Class of warrants exercise price			$ 2.84
Expiration term of warrants (in years)			18 months
July 2023 Registered Direct Offering \| Series B Warrants \| Maximum
Organization and Description of Business Operations
Number of warrants issued and sold to purchase shares			3,236,248
October 2023 Registered Direct Offering
Organization and Description of Business Operations
Class of warrants exercise price		$ 1.76								$ 5.00	$ 4.075
Number of warrants issued and sold to purchase shares		6,325,354
Total gross proceeds from Issuance of common stock		$ 11,100,000
Net proceeds from offering		10,000,000.0
Amount of commissions and other transaction costs		$ 1,100,000
October 2023 Registered Direct Offering \| Series A Warrants
Organization and Description of Business Operations
Class of warrants exercise price		$ 1.51
Expiration term of warrants (in years)		5 years
October 2023 Registered Direct Offering \| Series A Warrants \| Maximum
Organization and Description of Business Operations
Number of warrants issued and sold to purchase shares		6,325,354
October 2023 Registered Direct Offering \| Series B Warrants
Organization and Description of Business Operations
Class of warrants exercise price		$ 1.51
Expiration term of warrants (in years)		24 months
October 2023 Registered Direct Offering \| Series B Warrants \| Maximum
Organization and Description of Business Operations
Number of warrants issued and sold to purchase shares		6,325,354
January 2024 Registered Direct Offering
Organization and Description of Business Operations
Number of shares issued and sold	1,275,000
Purchase price per share	$ 1.805
Number of warrants issued	6,481,233
Class of warrants exercise price	$ 1.8049
Expiration term of warrants (in years)	5 years
Total gross proceeds from Issuance of common stock	$ 14,000,000.0
Net proceeds from offering	12,800,000
Amount of commissions and other transaction costs	$ 1,200,000
January 2024 Registered Direct Offering \| Pre-funded warrants
Organization and Description of Business Operations
Number of warrants issued	6,481,233
Class of warrants exercise price	$ 1.8049
January 2024 Registered Direct Offering \| Common Stock Warrants
Organization and Description of Business Operations
Class of warrants exercise price	$ 1.68
Number of warrants issued and sold to purchase shares	7,756,233
Expiration term of warrants (in years)	5 years
January 2024 Registered Direct Offering \| Common Stock Warrants \| Maximum
Organization and Description of Business Operations
Number of warrants issued and sold to purchase shares	7,756,233

Significant Accounting Policies (Details) - USD ($) $ in Millions			3 Months Ended		12 Months Ended
	Jan. 01, 2024	Jan. 01, 2023	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Mar. 17, 2015
Fortress Biotech, Inc
Significant Accounting Policies
Percentage of shares issued for offering and annual equity fee	2.50%					2.50%
Number of shares issued and sold	1,492,915	368,907	193,905	35,714
Research and development
Significant Accounting Policies
Value of common stock shares issued					$ 3.4

Significant Accounting Policies - Net Loss per Share (Details) - shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Significant Accounting Policies
Potentially dilutive securities that were excluded from the computation of diluted net loss per share, as they would be anti-dilutive	46,607,200	8,414,167
Warrants
Significant Accounting Policies
Potentially dilutive securities that were excluded from the computation of diluted net loss per share, as they would be anti-dilutive	42,139,278	6,516,211
Stock options
Significant Accounting Policies
Potentially dilutive securities that were excluded from the computation of diluted net loss per share, as they would be anti-dilutive	127,000	27,000
Unvested restricted stock awards
Significant Accounting Policies
Potentially dilutive securities that were excluded from the computation of diluted net loss per share, as they would be anti-dilutive	3,742,676	1,251,072
Unvested restricted stock units
Significant Accounting Policies
Potentially dilutive securities that were excluded from the computation of diluted net loss per share, as they would be anti-dilutive	598,246	619,884

License Agreements (Details) - USD ($)	1 Months Ended	3 Months Ended
License Agreements (Details) - USD ($)	Mar. 31, 2015	Mar. 31, 2024	Feb. 28, 2023	Jan. 31, 2019	May 31, 2016
NeuPharma, Inc. \| Additional sales milestone
License Agreements
Maximum potential milestone payments	$ 40,000,000.0
NeuPharma, Inc. \| Clinical and development milestone
License Agreements
Maximum potential milestone payments	39,000,000.0
NeuPharma, Inc. \| Regulatory approvals to commercialize the products
License Agreements
Maximum potential milestone payments	22,500,000
Dana-Farber Cancer Institute
License Agreements
Amount of milestone expensed	5,000,000.0
Maintenance fee	50,000
Dana-Farber Cancer Institute \| First commercial sale milestone
License Agreements
Maximum potential milestone payments	21,500,000
Dana-Farber Cancer Institute \| Additional sales milestone
License Agreements
Maximum potential milestone payments	$ 60,000,000.0
Adimab, LLC \| PD-L1 \| Research and development
License Agreements
Non-Refundable milestone payment			$ 2,200,000
Adimab, LLC \| Regulatory approvals to commercialize the products
License Agreements
Maximum potential milestone payments				$ 2,500,000
Jubilant Biosys Limited \| Additional sales milestone
License Agreements
Maximum potential milestone payments					$ 89,300,000
Jubilant Biosys Limited \| Regulatory approvals to commercialize the products
License Agreements
Maximum potential milestone payments					59,500,000
Jubilant Biosys Limited \| Clinical development and regulatory milestones
License Agreements
Maximum potential milestone payments					$ 88,400,000
Collaboration Agreement With TGTX
License Agreements
Revenue recognition milestone revenue recognized		$ 29,000
Sublicense Agreement with TGTX
License Agreements
Revenue recognition milestone revenue recognized		$ 6,000

Related Party Agreements (Details)		1 Months Ended	3 Months Ended
Related Party Agreements (Details)	Mar. 17, 2015 USD ($) item	Dec. 31, 2016 USD ($)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)
Fortress Biotech, Inc \| Founders Agreement
Related Party Agreements
Issuance of common stock, percentage of outstanding diluted equity	2.50%
Number of business days	5 days
Voting equity, percentage of equity or debt financing	2.50%
Cash fee, percentage of annual net sales	4.50%
Cash fees, maximum number of days	90 days
Control fees, number of times \| item	5
Control fees, monthly net sales	12 months
Cash fee, percentage of monthly net sales	4.50%
Agreement term	15 years
Agreement renewal term	1 year
Fortress Biotech, Inc \| Management Services Agreement
Related Party Agreements
Number of period	5 years
Annual consulting fee	$ 500,000
Increase in annual consulting fee	1,000,000.0
Excess in net assets value	$ 100,000,000
Agreement extension term	5 years
Costs and expenses, related party			$ 125,000	$ 125,000
Caribe Bioadvisors LLC
Related Party Agreements
Annual advisory service fee		$ 60,000
Costs and expenses, related party			27,000	27,000
Caribe Bioadvisors LLC \| Equity Incentive Grants
Related Party Agreements
Costs and expenses, related party			$ 12,000	$ 12,000

Stockholders' Equity - Restricted Stock Awards (Details) - Restricted Stock	3 Months Ended
	Mar. 31, 2024 $ / shares shares
Stockholders' Equity
Non-vested beginning balance \| shares	1,316,120
Number of Shares, Granted \| shares	2,704,000
Number of Shares, Forfeited \| shares	(23,894)
Number of Shares, Vested \| shares	(253,550)
Non-vested ending balance \| shares	3,742,676
Weighted Average Exercise Price, beginning balance \| $ / shares	$ 6.88
Weighted Average Grant Date Fair Value, Granted \| $ / shares	1.99
Weighted Average Grant Date Fair Value, Forfeited \| $ / shares	6.28
Weighted Average Grant Date Fair Value, Vested \| $ / shares	7.72
Weighted Average Exercise Price , ending balance \| $ / shares	$ 3.30

Stockholders' Equity - Restricted Stock Units (Details) - Unvested restricted stock units	3 Months Ended
	Mar. 31, 2024 $ / shares shares
Number of Shares
Non-vested beginning balance \| shares	615,884
Number of Shares, Forfeited \| shares	(17,638)
Non-vested ending balance \| shares	598,246
Weighted Average Grant Date Fair Value
Weighted Average Exercise Price, beginning balance \| $ / shares	$ 2.77
Weighted Average Grant Date Fair Value, Forfeited \| $ / shares	2.25
Weighted Average Exercise Price , ending balance \| $ / shares	$ 2.78

Stockholders' Equity - Stock Options (Details) - Stock Options - $ / shares	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Stockholders' Equity
Stock options, Outstanding (beginning)	127,000
Stock options, Outstanding (ending)	127,000	127,000
Vested and exercisable as of December 31, 2023	20,250
Weighted Average Exercise Price, Outstanding (beginning)	$ 8.88
Weighted Average Exercise Price, Outstanding (ending)	8.88	$ 8.88
Weighted Average Exercise Price, Vested and exercisable as of December 31, 2023	$ 24.74
Weighted Average Remaining Contractual Life, Outstanding (in years)	8 years 4 months 6 days	8 years 7 months 6 days
Weighted Average Remaining Contractual Life, Vested and exercisable as of December 31, 2023 (in years)	5 years 9 months 29 days

Stockholders' Equity - Warrants (Details) - Warrants - $ / shares	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Warrants, Outstanding beginning balance	30,097,671
Warrants, Granted	14,702,840
Warrants, Exercised	(2,661,233)
Warrants, Outstanding ending balance	42,139,278
Warrants, Weighted Average Exercise Price, beginning balance	$ 2.36
Weighted Average Exercise Price, Granted	0.96
Warrants, Weighted Average Exercise Price, Exercised	0
Warrants, Weighted Average Exercise Price, ending balance	$ 2.02
Warrants, Remaining contractual life	4 years 25 days	3 years

Stockholders' Equity - Stock-Based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Stockholders' Equity
Total stock-based compensation expense	$ 709	$ 969
Research and development
Stockholders' Equity
Total stock-based compensation expense	490	390
General and administrative
Stockholders' Equity
Total stock-based compensation expense	$ 220	$ 579

Stockholders' Equity - Additional Information (Details)				1 Months Ended						3 Months Ended
Stockholders' Equity - Additional Information (Details)	May 07, 2024 shares	Jan. 01, 2024 shares	Jan. 01, 2023 shares	Jan. 31, 2024 USD ($) $ / shares shares	Oct. 31, 2023 USD ($) $ / shares shares	Jul. 31, 2023 USD ($) $ / shares shares	May 31, 2023 USD ($) $ / shares shares	Apr. 30, 2023 USD ($) $ / shares shares	Feb. 28, 2023 USD ($) $ / shares shares	Mar. 31, 2024 USD ($) Vote multiplier $ / shares shares	Mar. 31, 2023 USD ($) shares	Dec. 31, 2023 $ / shares shares	Nov. 30, 2023 shares	Jun. 12, 2023 $ / shares shares	Feb. 22, 2023 $ / shares	Dec. 16, 2022 $ / shares	Nov. 30, 2020 USD ($)
Stockholders' Equity
Common stock, increase in the number of authorized shares (in shares)														30,000,000
Common stock, shares authorized										80,000,000		80,000,000		80,000,000
Common stock, par value (in dollars per share) \| $ / shares										$ 0.0001		$ 0.0001		$ 0.0001
Common stock, shares outstanding										34,986,279		27,042,035
Shelf registration statement, maximum authorized securities \| $																	$ 100,000,000
Common stock, shares issued										34,986,279		27,042,035
Issuance of common shares - Founders agreement \| $										$ 396,000	$ 156,000
Loss on common stock warrant liabilities \| $											7,566,000
Number of warrants issued					110,000
Number of warrants issued and sold to purchase shares													6,215,354
Common stock shares issuable										1,492,915		1,492,915
Pre-funded warrants
Stockholders' Equity
Class of warrants exercise price \| $ / shares				$ 0.0001		$ 0.0001			$ 0.0001
Non-vested restricted stock
Stockholders' Equity
Total unrecognized compensation cost related to non-vested \| $										$ 4,400,000
Weighted average period (in years)										1 year 10 months 24 days
Performance Shares
Stockholders' Equity
Restricted stock outstanding non-vested										1,466,733
2015 Incentive Plan
Stockholders' Equity
Number of shares available for issuance authorized										6,000,000
Plans expires (in years)										10 years
Shares are available for issuance										852,712
February 2023 Registered Direct Offering
Stockholders' Equity
Purchase price per share \| $ / shares									$ 5.25
Number of warrants issued									248,572
Number of shares issued and sold									1,180,000
Class of warrants exercise price \| $ / shares					$ 5.00
Total gross proceeds from Issuance of common stock \| $									$ 7,500,000
Net proceeds from offering \| $									6,700,000
Amount of commissions and other transaction costs \| $									$ 800,000
February 2023 Registered Direct Offering \| Pre-funded warrants
Stockholders' Equity
Number of warrants issued									248,572
Class of warrants exercise price \| $ / shares									$ 5.2499
Warrants offering price \| $ / shares									5.2499
February 2023 Registered Direct Offering \| Series A Warrants
Stockholders' Equity
Class of warrants exercise price \| $ / shares									$ 5.00
Expiration term of warrants (in years)									5 years
February 2023 Registered Direct Offering \| Series B Warrants
Stockholders' Equity
Class of warrants exercise price \| $ / shares									$ 5.00
Expiration term of warrants (in years)									18 months
February 2023 Registered Direct Offering \| Placement Agent Warrants
Stockholders' Equity
Number of warrants issued and sold to purchase shares									85,714
Class of warrants exercise price \| $ / shares									$ 6.5625
February 2023 Registered Direct Offering \| Maximum \| Series A Warrants
Stockholders' Equity
Number of warrants issued and sold to purchase shares									1,428,572
February 2023 Registered Direct Offering \| Maximum \| Series B Warrants
Stockholders' Equity
Number of warrants issued and sold to purchase shares									1,428,572
April 2023 Direct Offering
Stockholders' Equity
Purchase price per share \| $ / shares								$ 3.60
Shelf registration statement remaining authorized securities \| $											150,000,000
Number of shares issued and sold								1,700,000
Total gross proceeds from Issuance of common stock \| $								$ 6,100,000
Net proceeds from offering \| $								5,500,000
Amount of commissions and other transaction costs \| $								$ 600,000
April 2023 Direct Offering \| Series A Warrants
Stockholders' Equity
Class of warrants exercise price \| $ / shares								$ 3.35
Expiration term of warrants (in years)								5 years
April 2023 Direct Offering \| Series B Warrants
Stockholders' Equity
Class of warrants exercise price \| $ / shares								$ 3.35
Expiration term of warrants (in years)								18 months
April 2023 Direct Offering \| Placement Agent Warrants
Stockholders' Equity
Number of warrants issued and sold to purchase shares								102,000
Class of warrants exercise price \| $ / shares								$ 4.50
April 2023 Direct Offering \| Maximum \| Series A Warrants
Stockholders' Equity
Number of warrants issued and sold to purchase shares								1,700,000
April 2023 Direct Offering \| Maximum \| Series B Warrants
Stockholders' Equity
Number of warrants issued and sold to purchase shares								1,700,000
December 2022 direct offering
Stockholders' Equity
Class of warrants exercise price \| $ / shares					$ 4.075
May 2023 Registered Direct Offering
Stockholders' Equity
Purchase price per share \| $ / shares							$ 3.071
Number of warrants issued							1,606,269
Number of shares issued and sold							1,650,000
Class of warrants exercise price \| $ / shares							$ 3.0709
Total gross proceeds from Issuance of common stock \| $							$ 10,000,000.0
Net proceeds from offering \| $							9,100,000
Amount of commissions and other transaction costs \| $							$ 900,000
May 2023 Registered Direct Offering \| Pre-funded warrants
Stockholders' Equity
Number of warrants issued							1,606,269
Class of warrants exercise price \| $ / shares							$ 0.0001
May 2023 Registered Direct Offering \| Series A Warrants
Stockholders' Equity
Class of warrants exercise price \| $ / shares							$ 2.821
Expiration term of warrants (in years)							5 years
May 2023 Registered Direct Offering \| Series B Warrants
Stockholders' Equity
Class of warrants exercise price \| $ / shares							$ 2.821
Expiration term of warrants (in years)							18 months
May 2023 Registered Direct Offering \| Placement Agent Warrants
Stockholders' Equity
Number of warrants issued and sold to purchase shares							195,376
Class of warrants exercise price \| $ / shares							$ 3.8388
May 2023 Registered Direct Offering \| Maximum \| Series A Warrants
Stockholders' Equity
Number of warrants issued and sold to purchase shares							3,256,269
May 2023 Registered Direct Offering \| Maximum \| Series B Warrants
Stockholders' Equity
Number of warrants issued and sold to purchase shares							3,256,269
July 2023 Registered Direct Offering
Stockholders' Equity
Purchase price per share \| $ / shares						$ 3.09
Number of shares issued and sold						2,427,186
Total gross proceeds from Issuance of common stock \| $						$ 10,000,000.0
Net proceeds from offering \| $						9,100,000
Amount of commissions and other transaction costs \| $						$ 900,000
July 2023 Registered Direct Offering \| Pre-funded warrants
Stockholders' Equity
Number of warrants issued and sold to purchase shares						809,062
Class of warrants exercise price \| $ / shares						$ 3.0899
July 2023 Registered Direct Offering \| Series A Warrants
Stockholders' Equity
Class of warrants exercise price \| $ / shares						$ 2.84
Expiration term of warrants (in years)						5 years
July 2023 Registered Direct Offering \| Series B Warrants
Stockholders' Equity
Class of warrants exercise price \| $ / shares						$ 2.84
Expiration term of warrants (in years)						18 months
July 2023 Registered Direct Offering \| Placement Agent Warrants
Stockholders' Equity
Number of warrants issued and sold to purchase shares						194,175
Class of warrants exercise price \| $ / shares						$ 3.8625
July 2023 Registered Direct Offering \| Maximum \| Series A Warrants
Stockholders' Equity
Number of warrants issued and sold to purchase shares						3,236,248
July 2023 Registered Direct Offering \| Maximum \| Series B Warrants
Stockholders' Equity
Number of warrants issued and sold to purchase shares						3,236,248
January 2024 Registered Direct Offering
Stockholders' Equity
Purchase price per share \| $ / shares				$ 1.805
Number of warrants issued				6,481,233
Number of shares issued and sold				1,275,000
Class of warrants exercise price \| $ / shares				$ 1.8049
Expiration term of warrants (in years)				5 years
Total gross proceeds from Issuance of common stock \| $				$ 14,000,000.0
Net proceeds from offering \| $				12,800,000
Amount of commissions and other transaction costs \| $				$ 1,200,000
January 2024 Registered Direct Offering \| Pre-funded warrants
Stockholders' Equity
Number of warrants issued				6,481,233
Class of warrants exercise price \| $ / shares				$ 1.8049
January 2024 Registered Direct Offering \| Placement Agent Warrants
Stockholders' Equity
Number of warrants issued and sold to purchase shares				465,374
Class of warrants exercise price \| $ / shares				$ 2.2563
January 2024 Registered Direct Offering \| Common Stock Warrants
Stockholders' Equity
Number of warrants issued and sold to purchase shares				7,756,233
Class of warrants exercise price \| $ / shares				$ 1.68
Expiration term of warrants (in years)				5 years
January 2024 Registered Direct Offering \| Subsequent Event \| Pre-funded warrants
Stockholders' Equity
Warrants, Exercised	2,656,000
January 2024 Registered Direct Offering \| Maximum \| Common Stock Warrants
Stockholders' Equity
Number of warrants issued and sold to purchase shares				7,756,233
October 2023 Registered Direct Offering
Stockholders' Equity
Proceeds from Warrant \| $					$ 11,100,000
Payment of transactional costs for exercise of warrants \| $					$ 1,100,000
Number of warrants issued and sold to purchase shares					6,325,354
Class of warrants exercise price \| $ / shares					$ 1.76										$ 5.00	$ 4.075
Total gross proceeds from Issuance of common stock \| $					$ 11,100,000
Net proceeds from offering \| $					10,000,000.0
Amount of commissions and other transaction costs \| $					$ 1,100,000
October 2023 Registered Direct Offering \| Series A Warrants
Stockholders' Equity
Class of warrants exercise price \| $ / shares					$ 1.51
Expiration term of warrants (in years)					5 years
October 2023 Registered Direct Offering \| Series B Warrants
Stockholders' Equity
Class of warrants exercise price \| $ / shares					$ 1.51
Expiration term of warrants (in years)					24 months
October 2023 Registered Direct Offering \| Placement Agent Warrants
Stockholders' Equity
Number of warrants issued and sold to purchase shares					379,521
Class of warrants exercise price \| $ / shares					$ 2.20
October 2023 Registered Direct Offering \| Maximum \| Series A Warrants
Stockholders' Equity
Number of warrants issued and sold to purchase shares					6,325,354
October 2023 Registered Direct Offering \| Maximum \| Series B Warrants
Stockholders' Equity
Number of warrants issued and sold to purchase shares					6,325,354
Fortress
Stockholders' Equity
Issuance of common shares - Founders agreement \| $										$ 396,000	$ 156,000,000,000
Shelf registration statement remaining authorized securities \| $										$ 77,700,000
Percentage of annual equity fee		2.50%	2.50%							2.50%	2.50%
Common stock shares issuable		1,492,915
Number of shares issued and sold		1,492,915	368,907							193,905	35,714
Common Stock
Stockholders' Equity
Number of votes per share \| Vote										1
Multiplier to calculate voting rights per class A common share \| multiplier										1.1
Number of non assessable shares issued upon conversion										1
Common Stock \| July 2023 Registered Direct Offering
Stockholders' Equity
Number of shares issued and sold						2,427,186
Share price \| $ / shares						$ 3.09
Common Stock \| January 2024 Registered Direct Offering
Stockholders' Equity
Number of shares issued and sold				1,275,000
Common Class A
Stockholders' Equity
Common stock, shares authorized														700,000
Common stock, shares outstanding										700,000		700,000

Common Stock Warrant Liabilities - Additional Information (Details) - USD ($)	Mar. 31, 2024	Dec. 31, 2023
December 2022 direct offering \| Common Stock Warrant Liabilities
Common Stock Warrant Liabilities
Common Stock Warrant liabilities	$ 125,000	$ 125,000

Common Stock Warrant Liabilities (Details) - December 2022 direct offering - Common Stock Warrant Liabilities	Mar. 31, 2024 USD ($)
Common stock warrant liabilities
Common Stock Warrant liabilities at the beginning	$ 125,000
Common Stock Warrant liabilities at the end	$ 125,000

Common Stock Warrant Liabilities - Summary of the weighted average (in aggregate) significant unobservable inputs used in measuring the warrant liability that are categorized within Level 3 of the fair value hierarchy (Details) - Placement Agent Warrants - Level 3	Mar. 31, 2024 $ / shares Y	Dec. 31, 2023 $ / shares Y
Exercise price
Common Stock Warrant Liabilities
Measurement input \| $ / shares	5.41	5.41
Volatility
Common Stock Warrant Liabilities
Measurement input	1.075	0.964
Expected life
Common Stock Warrant Liabilities
Measurement input \| Y	3.7	4.0
Risk-free rate
Common Stock Warrant Liabilities
Measurement input	0.042	0.038

Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Accounts Payable and Accrued Expenses
Accounts payable	$ 11,923	$ 6,570
Accrued compensation	435	1,206
Accrued Research and development	6,218	7,123
Other	583	586
Total accounts payable and accrued expenses	$ 19,159	$ 15,485

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Thousands	Mar. 31, 2024	Mar. 31, 2023
Pay vs Performance Disclosure
Net Income (Loss)	$ (10,945)	$ (10,474)

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Mar. 31, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

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