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
                                                                                  
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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 *

Middleton Daina
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
_____ Officer (give title below)    _____ Other (specify below)
(Last)          (First)          (Middle)

C/O MARIN SOFTWARE INCORPORATED, 123 MISSION ST, 27TH FLOOR
3. Date of Earliest Transaction (MM/DD/YYYY)

6/2/2021
(Street)

SAN FRANCISCO, CA 94105
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

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

_X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

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
Common Stock 6/2/2021  M  27972 A (1)27972 D  

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
Restricted Stock Unit  (1)6/2/2021  M     27972   (2) (2)Common Stock 27972 $0.00 55944 D  

Explanation of Responses:
(1) Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock.
(2) The RSUs shall vest as to one-third of the total number of shares on the date of the Issuer's annual meeting of stockholders held in each of 2021, 2022 and 2023, provided that the Reporting Person continues to serve on the Issuer's Board of Directors on each vesting date and provided further that, in the event of certain corporate transactions, all of the shares subject to the RSUs shall immediately vest in full as of the effectiveness of such transaction.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
Middleton Daina
C/O MARIN SOFTWARE INCORPORATED
123 MISSION ST, 27TH FLOOR
SAN FRANCISCO, CA 94105
X



Signatures
/s/ Daina Middleton by Robert Bertz, Attorney-in-Fact6/4/2021
**Signature of Reporting PersonDate

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