Ownership Submission
FORM 3
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Benchmark Capital Management Co. VI, L.L.C.
2. Date of Event Requiring Statement (Month/Day/Year)
03/21/2013
3. Issuer Name and Ticker or Trading Symbol
MARIN SOFTWARE INC [MRIN]
(Last)
(First)
(Middle)
2480 SAND HILL ROAD, SUITE 200, 
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

MENLO PARK, CA 94025
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 Beneficially Owned
1.Title of Security
(Instr. 4)
2. Amount of Securities Beneficially Owned
(Instr. 4)
3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)
4. Nature of Indirect Beneficial Ownership
(Instr. 5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)
2. Date Exercisable and Expiration Date
(Month/Day/Year)
3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)
4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)
6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Series B Preferred Stock   (1)   (1) Common Stock 2,267,533 $ 0 (1) I See footnote (2)
Series C Preferred Stock   (1)   (1) Common Stock 718,984 $ 0 (1) I See footnote (2)
Series D Preferred Stock   (1)   (1) Common Stock 361,331 $ 0 (1) I See footnote (2)
Series E Preferred Stock   (1)   (1) Common Stock 182,946 $ 0 (1) I See footnote (2)
Series F Preferred Stock   (1)   (1) Common Stock 121,989 $ 0 (1) I See footnote (2)
Series F-1 Preferred Stock   (1)   (1) Common Stock 221,709 $ 0 (1) I See footnote (2)

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Benchmark Capital Management Co. VI, L.L.C.
2480 SAND HILL ROAD, SUITE 200
MENLO PARK, CA 94025
    X    
BENCHMARK CAPITAL PARTNERS VI LP
2480 SAND HILL ROAD
SUITE 200
MENLO PARK, CA 94025
    X    
BENCHMARK FOUNDERS FUND VI LP
2480 SAND HILL ROAD
SUITE 200
MENLO PARK, CA 94025
    X    
Benchmark Founders Fund VI-B, L.P.
2480 SAND HILL ROAD, SUITE 200
MENLO PARK, CA 94025
    X    
HARVEY KEVIN
2480 SAND HILL ROAD,
SUITE 200
MENLO PARK, CA 94025
    X    
GURLEY J WILLIAM
2480 SAND HILL ROAD,
SUITE 200
MENLO PARK, CA 94025
    X    
KAGLE ROBERT
2480 SAND HILL ROAD
SUITE 200
MENLO PARK, CA 94025
    X    
BALKANSKI ALEXANDRE
2480 SAND HILL ROAD,
SUITE 200
MENLO PARK, CA 94025
    X    

Signatures

/s/ Steven M. Spurlock, as Managing Member of Benchmark Capital Management Co. VI, L.L.C. 03/21/2013
**Signature of Reporting Person Date

/s/ Steven M. Spurlock, as Managing Member of Benchmark Capital Management Co. IV, L.L.C., the General Partner of Benchmark Capital Partners VI, L.P. 03/21/2013
**Signature of Reporting Person Date

/s/ Steven M. Spurlock, as Managing Member of Benchmark Capital Management Co. IV, L.L.C., the General Partner of Benchmark Founders' Fund VI, L.P. 03/21/2013
**Signature of Reporting Person Date

/s/ Steven M. Spurlock, as Managing Member of Benchmark Capital Management Co. IV, L.L.C., the General Partner of Benchmark Founders' Fund VI-B, L.P. 03/21/2013
**Signature of Reporting Person Date

s/ Steven M. Spurlock, by power of attorney for Alexandre Balkanski 03/21/2013
**Signature of Reporting Person Date

/s/ Steven M. Spurlock, by power of attorney for J. William Gurley 03/21/2013
**Signature of Reporting Person Date

/s/ Steven M. Spurlock, by power of attorney for Robert Kagle 03/21/2013
**Signature of Reporting Person Date

/s/ Steven M. Spurlock, by power of attorney for Kevin Harvey 03/21/2013
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(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).
(1) Each share of Preferred Stock will automatically convert into one (1) share of the Issuer's Common Stock upon the closing of the Issuer's initial public offering of Common Stock for no additional consideration, and has no expiration date.
(2) Shares held of record by Benchmark Capital Partners VI, L.P. ("BCP VI"), as nominee for BCP VI, Benchmark Founders' Fund VI, L.P. ("BFF VI"), Benchmark Founders' Fund VI-B, L.P. ("BFF IV-B") and related persons. Benchmark Capital Management Co. VI, L.L.C., the general partner of each of BCP VI, BFF VI and BFF VI-B, may be deemed to have sole voting and investment power over the reported shares of the Issuer's stock held by such funds.
 
Remarks:
Alexandre Balkanski, Matthew R. Cohler, Bruce W. Dunlevie, Peter H. Fenton, J. William Gurley, Kevin R. Harvey, Robert Kagle, Mitchell H. Lasky and Steven M. Spurlock are the managing members of Benchmark Capital Management Co. VI, L.L.C., which serves as general partner to Benchmark Capital Partners VI, L.P., Benchmark Founders' Fund VI, L.P. and Benchmark Founders' Fund VI-B, L.P., and may be deemed to share voting and investment power over the shares beneficially held by such entities. Each such person and entity disclaims the existence of a "group" and disclaims beneficial ownership of any securities (except to the extent of such person's or entity's pecuniary interest in such securities) other than any securities being reported herein as being directly owned by such person or entity. *This report is one of three reports, each on a separate Form 3, but relating to the same transaction being filed by entities affiliated with Benchmark Capital and their applicable members.*

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

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