FORM 4
☒ Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
 OMB APPROVAL
OMB Number: 3235-0287
Estimated average burden
hours per response... 0.5
                      
Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

MSD SPONSOR HOLDINGS, LLC		 2. Issuer Name and Ticker or Trading Symbol

MSD ACQUISITION CORP. / NEW [ MSDA ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                    __X__ 10% Owner
_____ Officer (give title below)    _____ Other (specify below)
(Last)          (First)          (Middle)

C/O MSD ACQUISITION CORP., ONE VANDERBILT AVENUE, 26TH FLOOR		 3. Date of Earliest Transaction (MM/DD/YYYY)

3/29/2023
(Street)

NEW YORK, NY 10017		 4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
 6. Individual or Joint/Group Filing (Check Applicable Line)

___ Form filed by One Reporting Person
_ X _ Form filed by More than One Reporting Person
(City)        (State)        (Zip)
Rule 10b5-1(c) Transaction Indication
☐ Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8) 		4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4) 		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)		2. Conversion or Exercise Price of Derivative Security3. Trans. Date3A. Deemed Execution Date, if any4. Trans. Code
(Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4)		8. Price of Derivative Security
(Instr. 5)		9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Class B ordinary shares  (1)3/29/2023  J   14224999     (1) (1)Class A ordinary shares 14224999  (1)1 D (2) 
Explanation of Responses:
(1) On March 17, 2023, the Issuer announced that it will not consummate an initial business combination within the time period required. Pursuant to the Issuer's Amended and Restated Memorandum and Articles of Association (the "Articles") and in connection with the winding up of the Issuer, the Class B ordinary shares, par value $0.0001, held by MSD Sponsor Holdings, LLC (the "Sponsor") were surrendered for no compensation on March 29, 2023.
(2) This Form 4 is being filed by the Sponsor. The Class B ordinary shares are held in the name of the Sponsor. The Sponsor is managed by a board of managers comprised of Gregg Lemkau, John Phelan and Robert Platek, who control the Sponsor. Accordingly, Messrs. Lemkau, Phelan and Platek have voting and investment discretion with respect to the securities held by the Sponsor, and may be deemed to have beneficial ownership of the securities held directly by the Sponsor. Each of Messrs. Lemkau, Phelan and Platek disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein.

Remarks:
After giving effect to the Issuer's delisting and deregistration, the Reporting Persons will no longer be subject to Section 16 reporting obligations.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
MSD SPONSOR HOLDINGS, LLC
C/O MSD ACQUISITION CORP.
ONE VANDERBILT AVENUE, 26TH FLOOR
NEW YORK, NY 10017
X

LEMKAU GREGG
C/O MSD ACQUISITION CORP.
ONE VANDERBILT AVENUE, 26TH FLOOR
NEW YORK, NY 10017		XXChief Executive Officer
PHELAN JOHN
C/O MSD ACQUISITION CORP.
ONE VANDERBILT AVENUE, 26TH FLOOR
NEW YORK, NY 10017		XX
Signatures
MSD Sponsor Holdings, LLC, By: /s/ Marcello Liguori, Vice President3/30/2023
**Signature of Reporting PersonDate

/s/ Marcello Liguori as attorney in fact for Gregg Lemkau3/30/2023
**Signature of Reporting PersonDate

/s/ Marcello Liguori as attorney in fact for John Phelan3/30/2023
**Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
*If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note:File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
MSD Acquisition (NASDAQ:MSDA)
Historical Stock Chart
From May 2024 to Jun 2024 Click Here for more MSD Acquisition Charts.
MSD Acquisition (NASDAQ:MSDA)
Historical Stock Chart
From Jun 2023 to Jun 2024 Click Here for more MSD Acquisition Charts.