Sec Form 4 Filing - Lien Christopher A. @ MARIN SOFTWARE INC - 2022-03-01

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 Lien Christopher A. 2. Issuer Name and Ticker or Trading Symbol MARIN SOFTWARE INC [ MRIN] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) CEO (Last) (First) (Middle) C/O MARIN SOFTWARE INCORPORATED, 845 MARKET STREET, SUITE 450 3. Date of Earliest Transaction (MM/DD/YY) 03/01/2022 (Street) SAN FRANCISCO, CA94103 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 Common Stock 03/01/2023 S 15,230 D $ 1.0728 ( 1 ) 8,377 D Common Stock 03/02/2023 S 8,377 D $ 1.0735 ( 2 ) 0 D Common Stock 219,569 I Held by Christopher A. Lien and Rebecca S. Lien, Co-Trustees the Lien Revocable Trust dated 7/8/2003 ( 3 ) Common Stock 19,285 I Held by the Christopher A. Lien 2013 Annuity Trust dated 2/4/13 ( 4 ) Common Stock 19,285 I Held by the Rebecca S. Lien 2013 Annuity Trust dated 2/4/13 ( 5 ) Common Stock 120 I Held by Rebecca S. Lien ( 6 )

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 Lien Christopher A. C/O MARIN SOFTWARE INCORPORATED 845 MARKET STREET, SUITE 450 SAN FRANCISCO, CA94103 X CEO Signatures /s/ Christopher A. Lien by Robert Bertz, Attorney-in-Fact 03/03/2023 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Represents the weighted average sale price. The lowest price at which shares were sold was $1.07 and the highest price at which shares were sold was $1.09. The Reporting Person undertakes to provide upon request to the staff of the Securities and Exchange Commission, the Issuer or its stockholders, full information regarding the total number of shares sold at each separate price within the range set forth herein. ( 2 )Represents the weighted average sale price. The lowest price at which shares were sold was $1.07 and the highest price at which shares were sold was $1.08. The Reporting Person undertakes to provide upon request to the staff of the Securities and Exchange Commission, the Issuer or its stockholders, full information regarding the total number of shares sold at each separate price within the range set forth herein. ( 3 )The Reporting Person serves as a co-trustee of the trust. ( 4 )The Reporting Person serves as the trustee of the trust. ( 5 )The Reporting Person's spouse serves as the trustee of the trust. ( 6 )The shares are held by the Reporting Person's spouse.

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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