Sec Form 3 Filing - Barkema Sarah @ Marqeta, Inc. - 2025-10-21

FORM 3 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 Barkema Sarah 2. Issuer Name and Ticker or Trading Symbol Marqeta, Inc. [ MQ] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Principal Accounting Officer (Last) (First) (Middle) 180 GRAND AVENUE, 6TH FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 10/21/2025 (Street) OAKLAND, CA94612 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ 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 Common Stock 82,618 ( 1 ) D

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 Restricted Stock Units ( 2 ) $ 0 ( 3 ) ( 3 ) Class A Common Stock 201,329 ( 3 ) D Restricted Stock Units ( 2 ) $ 0 ( 4 ) ( 4 ) Class A Common Stock 16,891 ( 4 ) D Restricted Stock Units ( 2 ) $ 0 ( 5 ) ( 5 ) Class A Common Stock 54,153 ( 5 ) D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Barkema Sarah 180 GRAND AVENUE 6TH FLOOR OAKLAND, CA94612 Principal Accounting Officer Signatures /s/ Sarah J. Barkema 10/24/2025 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The securities reported herein were acquired by the Reporting Person prior to the Reporting Person becoming a Section 16 officer of the Issuer. The Reporting Person became subject to Section 16 reporting on October 21, 2025, following her designation as Principal Accounting Officer by the Issuer's Board of Directors. ( 2 )Each restricted stock unit is convertible into one share of Class A Common Stock. ( 3 )One-third (1/3rd) of the grant of restricted stock units vested on September 1, 2025 and are included in the shares reported in Table I (minus shares withheld by the Issuer to satisfy tax withholding and remittance obligations). An additional one-twelfth (1/12th) of the remaining restricted stock units vest on each December 1, March 1, June 1, and September 1 thereafter, with the final one-twelfth (1/12th) vesting on September 1, 2027, subject to the Reporting Person's continued service with the Issuer as of each vesting date. ( 4 )One-twelfth (1/12th) of the grant of restricted stock units vested on each of June 1, 2025 and September 1, 2025 and are included in the shares reported on Table I (minus shares withheld by the Issuer to satisfy tax withholding and remittance obligations). One-twelfth (1/12th) of the remaining restricted stock units vest on each December 1, March 1, June 1, and September 1 thereafter, with the final one-twelfth (1/12th) vesting on March 1, 2028, subject to the Reporting Person's continued service with the Issuer as of each vesting date. ( 5 )10% of the grant of restricted stock units vested on September 1, 2025 and are included in the shares reported on Table I (minus shares withheld by the Issuer to satisfy tax withholding and remittance obligations). 20% of the remaining restricted stock units vest on December 1, 2025, 20% vests on March 1, 2026, and 50% vests on June 1, 2026 , subject to the Reporting Person's continued service to the Issuer as of each vesting date.

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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