Sec Form 4 Filing - GERSON RICK MATTHEW @ Pioneer Merger Corp. - 2023-01-17

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 Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person GERSON RICK MATTHEW 2. Issuer Name and Ticker or Trading Symbol Pioneer Merger Corp. [ PACX] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director X __ 10% Owner _____ Officer (give title below) X __ Other (specify below) See Remarks (Last) (First) (Middle) C/O PIONEER MERGER CORP., 667 MADISON AVENUE, 19TH FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 01/17/2023 (Street) NEW YORK, NY10065 4. If Amendment, Date Original Filed (MM/DD/YY) 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)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction 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 Class A Ordinary Shares 01/17/2023 D( 1 ) 4,450,000 D $ 10.13 0 I( 2 ) By Alpha Wave Ventures, LP

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (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) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other GERSON RICK MATTHEW C/O PIONEER MERGER CORP. 667 MADISON AVENUE, 19TH FLOOR NEW YORK, NY10065 X X See Remarks Alpha Wave Global, LP C/O PIONEER MERGER CORP. 667 MADISON AVENUE, 19TH FLOOR NEW YORK, NY10065 X X See Remarks Pioneer Merger Sponsor LLC C/O PIONEER MERGER CORP. 667 MADISON AVENUE, 19TH FLOOR NEW YORK, NY10065 X X See Remarks Salazar Oscar C/O PIONEER MERGER CORP. 667 MADISON AVENUE, 19TH FLOOR NEW YORK, NY10065 X X See Remarks CAPLAN MITCHELL H C/O PIONEER MERGER CORP. NEW YORK, NY10065 X X See Remarks Davis Richard Todd C/O PIONEER MERGER CORP. NEW YORK, NY10065 X X See Remarks Signatures Rick Gerson: By: /s/ Scott Carpenter, Attorney-in-Fact Alpha Wave Global, LP: By: Scott Carpenter, its Authorized Signatory /s/ Scott Carpenter Pioneer Merger Sponsor LLC By: Scott Carpenter, its Chief Operating Officer /s/ Scott Carpenter Oscar Salazar: 01/19/2023 Signature of Reporting Person Date By: /s/ Scott Carpenter, Attorney-in-Fact Mitchell Caplan:By: /s/ Scott Carpenter, Attorney-in-Fact Todd Davis: By: /s/ Scott Carpenter, Attorney-in-Fact 01/19/2023 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The reported securities were redeemed by the Issuer pursuant to a redemption of all Class A Shares in connection with the Issuer's liquidation. ( 2 )The reported securities were directly held by Alpha Wave Ventures, LP, an investment entity managed by Alpha Wave Global, LP ("Alpha Wave"). Rick Gerson is the Chairman and Chief Investment Officer of Alpha Wave.

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

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).

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