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 *   SPURLOCK STEVEN M 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
SPURLOCK STEVEN M 2480 SAND HILL ROAD, SUITE 200 MENLO PARK, CA 94025	Â	  X	Â	Â
FENTON PETER H 2480 SAND HILL ROAD SUITE 200 MENLO PAKR, CA 94025	Â	  X	Â	Â
LASKY MITCHELL 2480 SAND HILL ROAD SUITE 200 MENLO PARK, CA 94025	Â	  X	Â	Â
Cohler Matt 2480 SAND HILL ROAD SUITE 200 MENLO PARK, CA 94025	Â	  X	Â	Â

Signatures

/s/ Steven M. Spurlock, by power of attorney for Mitchell Lasky		03/21/2013
**Signature of Reporting Person		Date
/s/ Steven M. Spurlock, by power of attorney for Peter H. Fenton		03/21/2013
**Signature of Reporting Person		Date
/s/ Steven M. Spurlock, by power of attorney for Matthew R. Cohler		03/21/2013
**Signature of Reporting Person		Date
/s/ Steven M. Spurlock		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.*

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