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 *
  FENTON PETER H
 2. Date of Event Requiring Statement (Month/Day/Year)
03/24/2011		 3. Issuer Name and Ticker or Trading Symbol
SERVICESOURCE INTERNATIONAL, INC. [SREV]
(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)
Common Stock 11,150,740
I
See footnote (1)

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

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
FENTON PETER H
2480 SAND HILL ROAD, SUITE 200
MENLO PARK, CA 94025		     X    
LASKY MITCHELL
2480 SAND HILL ROAD, SUITE 200
MENLO PARK, CA 94025		     X    

Signatures

/s/ Steven M. Spurlock, by power of attorney for Peter H. Fenton 03/24/2011
**Signature of Reporting Person Date
/s/ Steven M. Spurlock, by power of attorney for Mitchell H. Lasky 03/24/2011
**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) Benchmark Capital Management Co. IV, LLC ("BCMC V"), the general partner of each of Benchmark Capital Partners V, L.P. ("BCP V"), Benchmark Founders' Fund V, L.P. ("BFF V"), Benchmark Founders' Fund V-A, L.P. ("BFF V-A") and Benchmark Founders' Fund V-B, L.P. ("BFF V-B"), may be deemed to have the sole voting and dispositive power over 11,150,740 shares of the Issuer's common stock. BCMC V and each of its managing members disclaim beneficial ownership of these shares of Issuer's common stock except to the extent of any pecuniary interest therein, and the filing of this report is not an admission that BCMC V and each of its managing members is the beneficial owner of these shares for purposes of Section 16 or for any other purpose.
 
Remarks:
Alexandre Balkanski, Bruce W. Dunlevie, J. William Gurley, Kevin R. Harvey, Robert C. Kagle, Steven M. Spurlock, Peter H. Fenton and Mitchell H. Lasky are the managing members of BCMC V, which serves as the general partner to each of BCP V, BFF V, BFF V-A and BFF V-B. Each reporting person disclaims the existence of a "group" and disclaims beneficial ownership of any securities except to the extent of such reporting person's pecuniary interest in such securities. *This report is one of two reports, each on a separate Form 3, but relating to the same transaction being filed by BCMC V, its managing members and the Benchmark V Funds.

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