BIOR Biora Therapeutics Inc

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

SCHEDULE 13D/A

Under the Securities Exchange Act of 1934

(Amendment No. 13)*

Biora Therapeutics, Inc.

(Name of Issuer)

Common Stock, par value $0.001 per share

(Title of Class of Securities)

74319F107

(CUSIP Number)

Andrew C. Hyman, Esq.

Athyrium Capital Management, LP

505 Fifth Avenue, 18th Floor

New York, New York 10017

(212) 402-6925

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

September 10, 2024

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-l(f) or 240.13d-1(g), check the following box. ☐

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See § 240.13d-7 for other parties to whom copies are to be sent.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

2/22

3/22

4/22

5/22

6/22

7/22

8/22

9/22

10/22

Explanatory Note

This Amendment No. 13 amends and supplements the Schedule 13D originally filed by the Reporting Persons (as defined below) with the Securities and Exchange Commission (the “SEC”) on July 6, 2020, (as amended to date, this “Schedule 13D”). Except as may be described herein, none of the Reporting Persons or, to the knowledge of the Reporting Persons, none of the Covered Persons (as defined below), has had any transactions in the Common Stock (as defined below) during the past 60 days. On January 3, 2023, the Company (as defined below) effected a reverse stock split (the “Reverse Stock Split”) of the Company’s Common Stock at a ratio of 25:1. The share and per share amounts reported in this Schedule 13D give effect to the Reverse Stock Split for all periods presented herein.

This Schedule 13D relates to the common stock, par value $0.001 per share (“Common Stock”), of Biora Therapeutics, Inc., a Delaware corporation (the “Company”). The address of the principal executive offices of the Company is 4330 La Jolla Village Drive, Suite 300, San Diego, California 92122.

(a)-(c) & (f) This Schedule 13D is filed jointly by the following persons pursuant to Rule 13d-1(k) promulgated under the Securities Exchange Act of 1934, as amended (the “Exchange Act”):

The persons described in (1) through (9) above are referred to herein as the “Reporting Persons.” A list of the directors, executive officers, managers, members and partners, as applicable, of each Reporting Person (collectively, the “Covered Persons”) is attached hereto as Annex A and is incorporated by reference herein. To the knowledge of the Reporting Persons, each of the Covered Persons that is a natural person is a United States citizen.

The principal business address of each of the Reporting Persons and each associated Covered Person is c/o Athyrium Capital Management, LP, 505 Fifth Avenue, Floor 18, New York, New York 10017.

(d) During the last five years, none of the Reporting Persons or, to their knowledge, none of the Covered Persons, has been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors).

(e) During the last five years, none of the Reporting Persons or, to their knowledge, none of the Covered Persons, has been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and, as a result of such proceeding, was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

Item 3. Source and Amount of Funds or Other Consideration.

On October 27, 2017, the Company and Co-Invest LP entered into a Series B Preferred Stock Purchase Agreement (the “2017 Series B Stock Purchase Agreement”), which provided for the sale of shares of Series B Preferred Stock for an aggregate purchase price of $50.0 million.

On August 27, 2019, the Company and Acquisition LP entered into a Series B Preferred Stock Purchase Agreement pursuant to which Acquisition LP purchased shares of Series B Preferred Stock for an aggregate purchase price of $25.0 million.

11/22

On November 12, 2019, the Company and Acquisition LP entered into a Series B Stock Preferred Stock Purchase Agreement (the “2019 Series B Stock Purchase Agreement”) pursuant to which Acquisition LP purchased additional shares of Series B Preferred Stock for an aggregate purchase price of $25.0 million. Also on November 12, 2019, Acquisition 2 LP acquired all of the securities of the Company held by Acquisition LP.

On December 19, 2019 and February 28, 2020, Acquisition 2 LP purchased additional shares of Series B Preferred Stock pursuant to the 2019 Series B Stock Purchase Agreement for an aggregate purchase price of $25.0 million and $10.0 million, respectively.

On March 31, 2020, Co-Invest LP and the Company entered into the First Amendment to the Credit Agreement (the “Credit Agreement Amendment”) providing for the payment in shares of the Company’s Series B Preferred Stock of the interest on the amount outstanding under the applicable credit agreement.

On April 3, 2020, the Company and Acquisition 2 LP entered into a Series B Preferred Stock Purchase Agreement pursuant to which Acquisition 2 LP purchased additional shares of Series B Preferred Stock for an aggregate purchase price of $10.0 million.

On May 8, 2020, the Company and 2020 LP entered into a Note Purchase Agreement pursuant to which 2020 LP purchased an unsecured convertible promissory note (the “Convertible Promissory Note”) with an annual interest rate of 8.0% and in an aggregate principal amount of $15.0 million.

In connection with the consummation of the Company’s initial public offering of its Common Stock, the Series B Preferred Stock and the Convertible Promissory Note converted, automatically and without any additional consideration, into 732,794 and 50,000 shares, respectively, of Common Stock. Further, on June 23, 2020, in connection with the initial public offering of the Company’s Common Stock, 2020 LP purchased 133,333 shares of Common Stock. The funds used to purchase such shares were composed of the investment capital of 2020 LP.

On December 7, 2020, the Company consummated a follow-on public offering of its Common Stock and a concurrent private placement of its 7.25% convertible senior notes due 2025 (the “7.25% Convertible Notes”). Acquisition 2 purchased 165,137 shares of Common Stock, and Acquisition LP purchased an aggregate principal amount of $25,000,000 of the 7.25% Convertible Notes in connection with the offerings. Such shares of Common Stock were purchased for an aggregate purchase price of $13.5 million, and such 7.25% Convertible Notes were purchased for $25.0 million in cash, in each case at the same price offered to the public. The funds used to purchase such shares and 7.25% Convertible Notes, as applicable, were composed of the investment capital of the applicable Fund. At the same time, Co-Invest LP consummated an agreement to receive an aggregate principal amount of $78,500,000 of the 7.25% Convertible Notes and $95,833.33 in cash in exchange for the cancellation of the $78.6 million in principal and accrued and unpaid interest outstanding, as well as a prepayment penalty, under the Company’s credit agreement for which Co-Invest LP acted as the lender and collateral agent.

On June 1, 2021, Acquisition LP and Co-Invest LP entered into a Consent and Waiver Agreement and, on May 27, 2021, a Stock Issuance Agreement (the “Stock Issuance Agreement”), each with the Company, pursuant to which Acquisition LP and Co-Invest LP agreed to forgo and waive their right to receive interest in cash due on the 7.25% Convertible Notes held by Acquisition LP and Co-Invest LP, in exchange for the issuance of shares of Common Stock equal to $3,626,812.50, the amount of cash interest so waived. Pursuant to the Stock Issuance Agreement, Acquisition LP acquired 12,252 shares of Common Stock and Co-Invest LP acquired 38,472 shares of Common Stock.

On June 14, 2021, the Company consummated a private placement of units (the “Private Placement”), with each unit consisting of one share of Common Stock and the right to buy an additional share of Common Stock for the exercise price specified in the warrant conferring such right (the “Common Stock Warrant”). In connection with the Private Placement, Acquisition 2 LP purchased 323,886 units with an aggregate purchase price of $20.0 million. On November 6, 2022, the Company and Acquisition 2 LP agreed to amend the Common Stock Warrant to reduce the exercise price to $8.22 per share of Common Stock (as amended, the “Amended Warrant”). The Amended Warrant is exercisable at any time on or after May 9, 2023 and until May 9, 2028, but not thereafter.

On November 6, 2022, Acquisition LP and Co-Invest LP entered into an Interest Waiver and Securities Issuance Agreement and a Securities Purchase Agreement (collectively, the “Interest Waiver Agreements”), in each case with the Company, pursuant to which Acquisition LP and Co-Invest LP agreed to forego and waive their right to receive an aggregate amount of $3,751,875 in cash interest due on the 7.25% Convertible Notes held by Acquisition LP and Co-Invest LP, in exchange for the issuance of shares of Common Stock and warrants to purchase an additional share of Common Stock (the “Second Common Stock Warrant”). In connection with the Interest Waiver Agreements, Acquisition LP acquired 120,833 shares of Common Stock and the right to purchase 120,833 shares of Common Stock pursuant to the Second Common Stock Warrant and Co-Invest LP acquired 379,416 shares of Common Stock and the right to purchase 379,416 shares of Common Stock pursuant to the Second Common Stock Warrant. The Second Common Stock Warrant originally had an exercise price of exercise price of $8.22 per share and is exercisable at any time on or after May 9, 2023 and until May 9, 2028, but not thereafter.

On September 18, 2023, the Company, Acquisition LP and Co-Invest LP entered into a Convertible Notes Exchange Agreement for Common Stock and Warrants (the “September 2023 Exchange Agreement”) whereby (i) Acquisition LP exchanged $12,077,000 aggregate principal amount of 7.25% Convertible Notes for (1) 2,230,690 shares of the Common Stock, pre-funded warrants to purchase 1,787,209 shares of Common Stock (“September 2023 Pre-Funded Warrants”) and warrants to purchase 4,017,899 shares of Common Stock (“September 2023 Warrants”), all to be issued to Acquisition 2 LP pursuant to the terms of the September 2023 Exchange Agreement, and (2) accrued and unpaid interest paid in cash on the 7.25% Convertible Notes exchanged to, but excluding, the closing date and (ii) Co-Invest LP exchanged $37,923,000 aggregate principal amount of 7.25% Convertible Notes for (1) 7,004,591 shares of Common Stock, September 2023 Pre-Funded Warrants to purchase 5,612,017 shares of Common Stock, September 2023 Warrants to purchase 12,616,608 shares of Common Stock, all to be issued to Co-Invest LP pursuant to the terms of the September 2023 Exchange Agreement, and (2) accrued and unpaid interest paid in cash on the 7.25% Convertible Notes exchanged to, but excluding, the closing date. The September 2023 Pre-Funded Warrants have an exercise price of $0.001 per share and are exercisable at any time on or after September 18, 2023 until such September 2023 Pre-Funded Warrants have been fully exercised in accordance with their terms. The September 2023 Warrants have an exercise price of $3.01 per share and are exercisable at any time on or after September 18, 2023 until September 18, 2026. Each of the September 2023 Pre-Funded Warrants and the September 2023 Warrants are subject to certain exercise limitations, including a limitation on the ability to exercise if the holder’s beneficial ownership of Common Stock (together with its affiliates and certain attribution parties) would exceed 49.9% of the outstanding Common Stock.

12/22

On December 18, 2023, the Company, Acquisition LP and Co-Invest LP entered into a Convertible Notes Purchase Agreement (the “December 2023 Purchase Agreement”) whereby (i) Acquisition LP purchased $1,680,000 aggregate principal amount of 11.00% / 13.00% Convertible Senior Secured Notes due 2028 (the “11.00% / 13.00% Convertible Notes”) and warrants to purchase 503,872 shares of Common Stock (such warrants, “December 2023 Additional Warrants”), which warrants were issued to and are directly held by Acquisition 2 LP pursuant to the terms of the Purchase Agreement, from the Company in exchange for $1,680,000 in interest that had accrued but not yet been paid to Acquisition LP under the 7.25% Convertible Notes, and (ii) Co-Invest LP purchased $5,273,000 aggregate principal amount of 11.00% / 13.00% Convertible Notes and December 2023 Additional Warrants to purchase 1,581,500 shares of Common Stock from the Company in exchange for $5,273,000 in interest that had accrued but not yet been paid to Co-Invest LP under the 7.25% Convertible Notes. On December 18, 2023, the Company, Acquisition LP and Co-Invest LP entered into a Convertible Notes Exchange Agreement for New Notes and Common Stock or Warrants (the “December 2023 Exchange Agreement”) whereby (i) Acquisition LP exchanged (1) $3,360,000 aggregate principal amount of 7.25% Convertible Notes due 2025 (the “7.25% Convertible Notes”) directly held by Acquisition LP for $2,520,000 aggregate principal amount of 11.00% / 13.00% Convertible Notes, together with accrued and unpaid interest on the 7.25% Convertible Notes exchanged, and (2) $9,563,000 aggregate principal amount of 7.25% Convertible Notes for warrants to purchase 1,217,109 shares of Common Stock (the “December 2023 Exchange Warrants”), which warrants were issued to and are directly held by Acquisition 2 LP pursuant to the terms of the December 2023 Exchange Agreement, together with accrued and unpaid interest on the 7.25% Convertible Notes exchanged, and (ii) Co-Invest LP exchanged (1) $10,546,000 aggregate principal amount of 7.25% Convertible Notes directly held by Co-Invest LP for $7,910,000 aggregate principal amount of 11.00% / 13.00% Convertible Notes, together with accrued and unpaid interest on the 7.25% Convertible Notes exchanged, and (2) $30,031,000 aggregate principal amount of 7.25% Convertible Notes for December 2023 Exchange Warrants to purchase 3,822,127 shares of Common Stock, together with accrued and unpaid interest on the 7.25% Convertible Notes exchanged. All accrued and unpaid interest on 7.25% Convertible Notes exchanged pursuant to the December 2023 Exchange Agreement was used to pay, in part, the purchase price owing pursuant to the December 2023 Purchase Agreement. The 11.00% / 13.00% Convertible Notes are subject to certain limitations on conversion, and limitations on the Company’s ability to issue Common Stock to satisfy obligations under the 11.00% / 13.00% Convertible Notes, including a limitation on the ability of the holder to convert or the Company to issue Common Stock if the holder’s beneficial ownership of Common Stock (together with its affiliates and certain attribution parties) would, in the case of Acquisition LP and Co-Invest LP, exceed 49.9% of the outstanding Common Stock. The December 2023 Additional Warrants originally had an exercise price of $5.00 per share and are exercisable at any time on or after December 19, 2023 until December 19, 2028. The December 2023 Exchange Warrants originally had an exercise price of $5.50 per share and are exercisable at any time on or after December 19, 2023 until December 19, 2028. Each of the December 2023 Additional Warrants and the December 2023 Exchange Warrants are subject to certain exercise limitations, including a limitation on the ability to exercise if the holder’s beneficial ownership of Common Stock (together with its affiliates and certain attribution parties) would exceed 49.9% of the outstanding Common Stock.

On July 3, 2024, the Company entered into a letter agreement (the “Forbearance Agreement”) with the holders of the 11.00% / 13.00% Convertible Notes pursuant to which, in exchange for the holders agreeing to forbear from exercising or enforcing certain rights and remedies against the Company under the terms of the 11.00% / 13.00% Convertible Notes, the Company issued to the holders certain warrants to purchase shares of Common Stock (the “Forbearance Warrants”). Pursuant to the terms of Forbearance Agreement, on July 3, 2024, the Company issued to Acquisition 2 LP and Co-Invest LP Forbearance Warrants to purchase 110,479 and 346,771 shares of Common Stock, respectively. The Forbearance Warrants originally had an exercise price of $0.63 per share and are exercisable at any time on or after July 3, 2024 and on or prior to 5:00 p.m. on July 3, 2029. The Forbearance Warrants are subject to certain exercise limitations, including a limitation on the ability to exercise if the holder’s beneficial ownership of Common Stock (together with its affiliates and certain attribution parties) would exceed 49.9% of the outstanding Common Stock.

On August 12, 2024, the Company, Acquisition LP, Co-Invest LP and the other noteholders party thereto entered into a Convertible Notes Exchange Agreement (the “August 2024 Exchange Agreement”) whereby the Company and the holders of all outstanding 11.00% / 13.00% Convertible Notes agreed to the following:

13/22

The transactions contemplated by the August 2024 Exchange Agreement were completed on August 15, 2024. On September 10, 2024, the parties to the August 2024 Purchase Agreement purchased additional Payment Priority Notes under the terms of the August 2024 Purchase Agreement and, in connection with this purchase, Acquisition LP and Co-Invest LP concurrently completed the exchange of $666,842 and $2,093,144 aggregate principal amount, respectively, of Payment Junior Notes for Payment Priority Notes concurrently with such purchase.

The Reporting Persons acquired the securities reported herein for investment purposes and intend to review their investments in the Company on a continuing basis. Depending on various factors, including but not limited to the Company’s financial position and strategic direction, price levels of the Common Stock, conditions in the securities markets, various laws and regulations applicable to the Company and companies in its industry and the Reporting Persons’ ownership in the Company, and general economic and industry conditions, the Reporting Persons may in the future take actions with respect to their investment in the Company as they deem appropriate, including changing their current intentions, with respect to any or all matters required to be disclosed herein. Without limiting the foregoing, and subject to any applicable limitations described in Item 6 below, the Reporting Persons may, from time to time, acquire or cause affiliates to acquire additional shares of Common Stock or other securities of the Company (including any combination or derivative thereof), dispose, or cause affiliates to dispose, of some or all of their Common Stock or other securities of the Company or continue to hold, or cause affiliates to hold, Common Stock or other securities of the Company.

In addition, the Reporting Persons have had and intend to continue having discussions, from time to time, with management and the board of directors of the Company, and may engage with other stockholders or securityholders of the Company and other relevant parties, or take other actions concerning, the Company’s business, lines of business, operations, strategy, plans and prospects; any extraordinary corporate transactions (including, but not limited to, a merger, reorganization or liquidation); sales of a material amount of assets or divestitures; a change in the board of directors or management; a material change in the Company’s capitalization, capital structure or dividend policies; other material changes in the Company’s business, lines of business, or corporate structure; or similar actions.

Except as set forth herein, or as would occur upon completion of any of the matters discussed herein, the Reporting Persons have no present plans, proposals or intentions which would result in or relate to any of the transactions described in subparagraphs (a) through (j) of Item 4 of Schedule 13D. Although the foregoing reflects activities presently contemplated by the Reporting Persons and each other individuals named in Item 2 with respect to the Company, the foregoing is subject to change at any time.

The information set forth under Items 3 and 6 is incorporated by reference herein.

(a)-(b) The information contained on the cover pages of this Schedule 13D is incorporated herein by reference.

The Reporting Persons beneficially own in the aggregate 25,437,371 shares of Common Stock, which represents approximately 49.9% of the outstanding shares of Common Stock. All calculations of percentage ownership in this Schedule 13D are based on (i) 36,469,088 shares of Common Stock outstanding as of August 6, 2024 as disclosed in the Company’s Quarterly Report on Form 10-Q filed with the SEC on August 12, 2024, plus (ii) shares issuable upon conversion of the 11.00% / 13.00% Convertible Notes held by the Reporting Persons, to the extent the 11.00% / 13.00% Convertible Notes are then convertible and the resulting shares are considered beneficially owned under applicable rules promulgated under the Exchange Act, plus (iii) shares underlying the Amended Warrant, the Amended Second Common Stock Warrant, the September 2023 Pre-Funded Warrants, the September 2023 Warrants, the December 2023 Additional Warrants, the December 2023 Exchange Warrants and the Forbearance Warrants, to the extent such warrants are then exercisable and the resulting shares are considered beneficially owned under applicable rules promulgated under the Exchange Act.

To the knowledge of the Reporting Persons, none of the Covered Persons directly owns any shares of Common Stock; provided, however, that because of each Covered Persons’ status as a director, executive officer, manager, member or partner of a Reporting Person, a Covered Person may be deemed to be the beneficial owner of the shares of Common Stock beneficially owned by such Reporting Person. Except to the extent of their pecuniary interest, each of the Covered Persons disclaims beneficial ownership of the shares of the Common Stock reported herein and the filing of this Schedule 13D shall not be construed as an admission that any such Covered Person is the beneficial owner of any securities covered by this statement.

(d) Except as described herein, none of the Reporting Persons or, to their knowledge, none of the Covered Persons, has had any transactions in the Common Stock during the past 60 days.

(e) Except as set forth herein, to the knowledge of the Reporting Persons, no other person has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, any shares of Common Stock.

(f) Not applicable.

Fourth Amended and Restated Investors’ Rights Agreement

On August 27, 2019, Co-Invest LP, Acquisition LP and certain of their affiliates (the “Athyrium Parties”) entered into a fourth amended and restated investors’ rights agreement (the “Investors’ Rights Agreement”) with the Company and the other stockholders of the Company. The Investors’ Rights Agreement provides that the stockholders of the Company have certain registration rights described below. On November 12, 2019, in connection with its acquisition of the securities of the Company previously held by Acquisition LP, Acquisition 2 LP signed a joinder agreement to the Investors’ Rights Agreement and became one of the Athyrium Parties discussed below.

The registration rights described below will expire (i) with respect to any Athyrium Party, at the time such Athyrium Party can sell all of its registrable securities under Rule 144 or another similar exemption under the Securities Act of 1933, as amended (the “Securities Act”), without limitation during a three-month period without registration, or (iii) upon termination of the Investors’ Rights Agreement.

14/22

The key registration rights under the Investors’ Rights Agreement are as follows:

On November 10, 2020, the Company and the other stockholders party thereto entered into Amendment No. 1 to the Investors’ Rights Agreement in order to provide for the registration of the shares of Common Stock issued or issuable upon conversion of the Convertible Promissory Note.

On December 7, 2020, the Company and the other stockholders party thereto entered into Amendment No. 2 to the Investors’ Rights Agreement in order to provide for the registration of the shares of Common Stock issued or issuable upon conversion of the 7.25% Convertible Notes.

On May 31, 2021, the Company and the other stockholders party thereto entered into Amendment No. 3 to the Investors’ Rights Agreement in order to provide for the registration of the shares of Common Stock issued pursuant to the Stock Issuance Agreement.

On August 19, 2021, in connection with the proposed sale by the Company of Common Stock and warrants to purchase Common Stock pursuant to the Company’s registration statement on Form S-3 filed with the SEC on July 30, 2021 (the “Shelf Registration Statement”), the Company and the stockholders party to the Investors’ Rights Agreement entered into that certain Notice and Waiver, pursuant to which such stockholders waived their respective right to request that the Company include the securities registrable pursuant to the Investor Rights Agreement among the securities registered on the Shelf Registration Statement.

On September 18, 2023, in connection with the transactions contemplated by the September 2023 Exchange Agreement, the Company and the other stockholders party thereto entered into Amendment No. 4 to the Investors’ Rights Agreement in order to provide for the registration of the shares of Common Stock issued pursuant to the September 2023 Exchange Agreement and issuable pursuant to the terms of the September 2023 Pre-Funded Warrants and the September 2023 Warrants.

Amended Warrant

On June 14, 2021, the Company issued a Common Stock Warrant to Acquisition 2 LP as registered holder. On November 6, 2022 and August 12, 2024, the Company and Acquisition 2 LP agreed to amend the Common Stock Warrant. This Amended Warrant is exercisable for 323,886 shares of Common Stock at an exercise price of $0.60 per share, at any time on or after May 9, 2023 and prior to May 9, 2028, subject to extension in certain circumstances as described in Item 3 above.

Second Common Stock Warrant

On November 9, 2022, the Company issued the Second Common Stock Warrant to Acquisition LP and Co-Invest LP in connection with the Interest Waiver Agreements. On August 12, 2024, the Company, Acquisition LP and Co-Invest LP agreed to amend the Second Common Stock Warrant. As amended, the Second Common Stock Warrant is exercisable for 500,249 shares of Common Stock, has an exercise price of $0.60 per share of Common Stock and is exercisable at any time between May 9, 2023 and prior to its expiration on May 9, 2028, subject to extension in certain circumstances as described in Item 3 above.

September 2023 Pre-Funded Warrants

On September 18, 2023, pursuant to the terms of the September 2023 Exchange Agreement, the Company issued (i) September 2023 Pre-Funded Warrants to purchase 1,787,209 shares of Common Stock to Acquisition 2 LP and (ii) September 2023 Pre-Funded Warrants to purchase 5,612,017 shares of Common Stock to Co-Invest LP. The September 2023 Pre-Funded Warrants have an exercise price of $0.001 per share and are exercisable at any time on or after September 18, 2023 until such September 2023 Pre-Funded Warrants have been fully exercised in accordance with their terms. Each of the September 2023 Pre-Funded Warrants are subject to certain exercise limitations, including a limitation on the ability to exercise if the holder’s beneficial ownership of Common Stock (together with its affiliates and certain attribution parties) would exceed 49.9% of the outstanding Common Stock.

15/22

September 2023 Warrants

On September 18, 2023, pursuant to the terms of the September 2023 Exchange Agreement, the Company issued (i) September 2023 Warrants to purchase 4,017,899 shares of Common Stock to Acquisition 2 LP and (ii) September 2023 Warrants to purchase 12,616,608 shares of Common Stock to Co-Invest LP. The September 2023 Warrants have an exercise price of $3.01 per share and are exercisable at any time on or after September 18, 2023 until September 18, 2026. Each of the September 2023 Warrants are subject to certain exercise limitations, including a limitation on the ability to exercise if the holder’s beneficial ownership of Common Stock (together with its affiliates and certain attribution parties) would exceed 49.9% of the outstanding Common Stock.

11.00% / 13.00% Convertible Notes

On December 19, 2023, the Company issued a new series of 11.00% / 13.00% Convertible Notes. The 11.00% / 13.00% Convertible Notes were issued pursuant to, and are governed by, an indenture, dated as of December 19, 2023, by and between the Company and GLAS Trust Company LLC, as trustee and collateral agent. The 11.00% / 13.00% Convertible Notes are the Company’s senior secured obligations and are secured by substantially all of the Company’s and its subsidiaries’ assets. The indenture governing the 11.00% / 13.00% Convertible Notes will be amended and restated in connection with the completion of the transactions contemplated by the August 2024 Exchange Agreement and will divide the 11.00% / 13.00% Convertible Notes into two tranches: Payment Priority Notes and Payment Junior Notes.

Interest on the 11.00% / 13.00% Convertible Notes is payable in cash, or at the Company’s election subject to certain limitations, with a combination of cash and shares of Common Stock (“blended payments”) or, with the agreement of the applicable holder, through payment-in-kind. The 11.00% / 13.00% Convertible Notes will accrue interest at a rate of 11.00% per annum in the case of cash payment and 13.00% in the case of blended payments or payments-in-kind, payable semi-annually in arrears on June 1 and December 1 of each year, with the initial payment on June 1, 2024. On December 19, 2023, the Company, Acquisition LP and Co-Invest LP agreed that payments of interest on 11.00% / 13.00% Convertible Notes held by Acquisition LP and Co-Invest LP would be made as payments-in-kind until Acquisition LP and Co-Invest LP provide five business days advance notice to the Company revoking this election. Notwithstanding the foregoing, the Company must pay interest on the Payment Junior Notes in-kind while the Payment Priority Notes are outstanding.

The 11.00% / 13.00% Convertible Notes will mature on the earlier of December 19, 2028 and the date that is 90 days prior to the maturity of the 7.25% Convertible Notes solely to the extent there are 7.25% Convertible Notes outstanding in a principal amount equal to or greater than $5,000,000 as of such date, unless earlier repurchased, redeemed or converted.

At any time from the December 19, 2023 and before the close of business on the second scheduled trading day immediately before the maturity date, noteholders may convert their 11.00% / 13.00% Convertible Notes at their option into shares of Common Stock, together, if applicable, with cash in lieu of any fractional share, at the then-applicable conversion rate. The initial conversion rate (as agreed to be amended and restated in connection with the August 2024 Exchange Agreement) is 1,321.571348 shares of Common Stock per $1,000 principal amount of 11.00% / 13.00% Convertible Notes, which represents an initial conversion price of approximately $0.76 per share of Common Stock. Noteholders that convert their Notes will be entitled to an additional premium payment representing the amount of certain of the remaining interest payments on the 11.00% / 13.00% Convertible Notes as specified in the indenture, which the Company may settle in cash, shares of common stock, or a combination, subject to the terms of the indenture. The conversion rate and conversion price will be subject to customary adjustments upon the occurrence of certain events. The 11.00% / 13.00% Convertible Notes are subject to certain limitations on conversion, and limitations on the Company’s ability to issue Common Stock to satisfy obligations under the 11.00% / 13.00% Convertible Notes, including a limitation on the ability of the holder to convert or the Company to issue Common Stock if the holder’s beneficial ownership of Common Stock (together with its affiliates and certain attribution parties) would, in the case of Acquisition LP and Co-Invest LP, exceed 49.9% of the outstanding Common Stock.

The 11.00% / 13.00% Convertible Notes are redeemable, in whole and not in part, at the Company’s option at any time on or after December 19, 2024, and in some circumstances prior to that date, at a cash redemption price equal to the principal amount of the 11.00% / 13.00% Convertible Notes to be redeemed, plus accrued and unpaid interest, if any, to, but excluding, the redemption date, but only if the last reported sale price per share of the Common Stock exceeds 150% of the conversion price on (i) each of at least 20 trading days, whether or not consecutive, during the 30 consecutive trading days ending on, and including, the trading day immediately before the date the Company sends the related redemption notice; and (2) the trading day immediately before the date the Company sends such notice.

If certain corporate events that constitute a “Fundamental Change” (as defined in the indenture) occur, then noteholders may require the Company to repurchase their 11.00% / 13.00% Convertible Notes at a cash repurchase price equal to the principal amount of the 11.00% / 13.00% Convertible Notes to be repurchased, plus accrued and unpaid interest, if any, to, but excluding, the fundamental change repurchase date. The definition of Fundamental Change includes certain business combination transactions involving the Company and certain de-listing events with respect to the Common Stock.

The Company must offer to repurchase the Payment Priority Notes or all of the 11.00% / 13.00% Convertible Notes based on certain conditions relating to the Company’s consummation of an equity capital raise within 30 days following announcement of a collaboration agreement with a pharmaceutical company involving one or more of the Company’s product development programs.

The indenture contains covenants restricting the Company’s ability to incur indebtedness, incur liens, make restricted payments, make asset sales and engage in transactions with affiliates, subject to certain baskets. The indenture also requires the Company to maintain minimum liquidity of $4 million and to add future assets to the collateral securing the 11.00% / 13.00% Convertible Notes and to add future subsidiaries as guarantors of the 11.00% / 13.00% Convertible Notes.

December 2023 Additional Warrants

On December 19, 2023, pursuant to the terms of the December 2023 Purchase Agreement, the Company issued (i) December 2023 Additional Warrants to purchase 503,872 shares of Common Stock to Acquisition 2 LP and (ii) December 2023 Additional Warrants to purchase 1,581,500 shares of Common Stock to Co-Invest LP. On August 12, 2024, the Company, Acquisition 2 LP and Co-Invest LP agreed to amend the December 2023 Additional Warrants. As amended, the December 2023 Additional Warrants have an exercise price of $0.60 per share and are exercisable at any time on or after December 19, 2023 until December 19, 2028, subject to extension in certain circumstances as described in Item 3 above. Each of the December 2023 Additional Warrants are subject to certain exercise limitations, including a limitation on the ability to exercise if the holder’s beneficial ownership of Common Stock (together with its affiliates and certain attribution parties) would exceed 49.9% of the outstanding Common Stock.

16/22

December 2023 Exchange Warrants

On December 19, 2023, pursuant to the terms of the December 2023 Exchange Agreement, the Company issued (i) December 2023 Exchange Warrants to purchase 1,217,109 shares of Common Stock to Acquisition 2 LP and (ii) December 2023 Exchange Warrants to purchase 3,822,127 shares of Common Stock to Co-Invest LP. On August 12, 2024, the Company, Acquisition 2 LP and Co-Invest LP agreed to amend the December 2023 Exchange Warrants. As amended, the December 2023 Exchange Warrants have an exercise price of $0.60 per share and are exercisable at any time on or after December 19, 2023 until December 19, 2028, subject to extension in certain circumstances as described in Item 3 above. Each of the December 2023 Exchange Warrants are subject to certain exercise limitations, including a limitation on the ability to exercise if the holder’s beneficial ownership of Common Stock (together with its affiliates and certain attribution parties) would exceed 49.9% of the outstanding Common Stock.

December 2023 Registration Rights Agreement

On December 19, 2023, in connection with the completion of the transactions contemplated by the December 2023 Purchase Agreement and the December 2023 Exchange Agreement, the Company, Acquisition LP, Acquisition 2 LP, Co-Invest LP and certain other parties thereto entered into a Registration Rights Agreement (the “December 2023 Registration Rights Agreement”), which requires the Company to register, among other things, the resale of all shares of Common Stock issuable upon conversion or exercise of, or otherwise issuable pursuant to, the 11.00% / 13.00% Convertible Notes, the December 2023 Additional Warrants or the December 2023 Exchange Warrants. The Company is required to prepare and file a registration statement with the SEC no later than five business days after the date of the agreement, and to use its commercially reasonable efforts to have the registration statement declared effective 120 days after the date of the agreement. The registration rights will expire on the earliest of (i) when a registration statement covering such securities becomes or has been declared effective by the SEC and such securities have been sold or disposed of pursuant to such effective registration statement; (ii) when such securities are held by the Company or one of its subsidiaries; and (iii) the date on which such securities may be sold by the holder thereof without volume or manner of sale restrictions under Rule 144 under the Securities Act.

Forbearance Warrants

On July 3, 2024, the Company entered into the Forbearance Agreement with the holders of the 11.00% / 13.00% Convertible Notes pursuant to which, in exchange for the holders agreeing to forbear from exercising or enforcing certain rights and remedies against the Company under the terms of the 11.00% / 13.00% Convertible Notes, the Company issued to the holders Forbearance Warrants. Pursuant to the terms of Forbearance Agreement, on July 3, 2024, the Company issued to Acquisition 2 LP and Co-Invest LP Forbearance Warrants to purchase 110,479 and 346,771 shares of Common Stock, respectively. On August 12, 2024, the Company, Acquisition 2 LP and Co-Invest LP agreed to amend the Forbearance Warrants. As amended, the Forbearance Warrants have an exercise price of $0.60 per share and are exercisable at any time on or after July 3, 2024 and on or prior to 5:00 p.m. on July 3, 2029, subject to extension in certain circumstances as described in Item 3 above. The Forbearance Warrants are subject to certain exercise limitations, including a limitation on the ability to exercise if the holder’s beneficial ownership of Common Stock (together with its affiliates and certain attribution parties) would exceed 49.9% of the outstanding Common Stock.

August 2024 Exchange Agreement

On August 12, 2024, the Company, Acquisition LP, Co-Invest LP and the other noteholders party thereto entered into the August 2024 Exchange Agreement whereby the Company and the holders of all outstanding 11.00% / 13.00% Convertible Notes agreed to the following:

17/22

The transactions contemplated by the August 2024 Exchange Agreement were completed on August 15, 2024. On September 10, 2024, the parties to the August 2024 Purchase Agreement purchased additional Payment Priority Notes under the terms of the August 2024 Purchase Agreement and, in connection with this purchase, Acquisition LP and Co-Invest LP concurrently completed the exchange of $666,842 and $2,093,144 aggregate principal amount, respectively, of Payment Junior Notes for Payment Priority Notes concurrently with such purchase.

Other Information

The foregoing summary of the Investors’ Rights Agreement, December 2023 Registration Rights Agreement, 11.00% / 13.00% Convertible Notes, Amended Warrant, Second Common Stock Warrant, September 2023 Exchange Agreement, September 2023 Pre-Funded Warrants, September 2023 Warrants, December 2023 Additional Warrants, December 2023 Exchange Warrants, Forbearance Agreement, Forbearance Warrants and the August 2024 Exchange Agreement is qualified in its entirety by reference to the complete text of such agreements and to the forms of voting agreement, registration rights agreement and amendment to the existing warrants, each to be executed in connection with the completion of the transactions contemplated by the August 2024 Exchange Agreement. Copies of each of these documents are filed as exhibits hereto and are incorporated herein by reference.

Pursuant to Rule 13d-1(k) promulgated under the Exchange Act, the Reporting Persons have entered into an agreement with respect to the joint filing of this Schedule 13D, which agreement is set forth on the signature page to this Schedule 13D.

Except as described above and herein in this Schedule 13D, there are no other contracts, understandings or relationships (legal or otherwise) among the parties named in Item 2 hereto and between such persons and any person with respect to any of the common stock of the Company owned by the Funds.

18/22

19/22

SIGNATURES

After reasonable inquiry and to the best of his or its knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.

In accordance with Rule 13d-1(k)(1)(iii) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of this Schedule 13D with respect to the common stock of the Company.

Dated as of September 12, 2024.

20/22

21/22

ANNEX A

Other than as set forth below, and in the Schedule 13D to which this Annex A is attached, none of the Reporting Persons have appointed any executive officers or directors.

Athyrium Opportunities Associates Co-Invest LLC

The name and principal occupation of each of the members and executive officers of Athyrium Opportunities Associates Co-Invest LLC are listed below:

Athyrium Opportunities Associates III GP LLC

The name and principal occupation of each of the members and executive officers of Athyrium Opportunities Associates III GP LLC are listed below:

22/22