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 *
  Reynolds Barry D.
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)
C/O HOUSATONIC PARTNERS, 44 MONTGOMERY STREET, SUITE 4010
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

SAN FRANCISCO, CA 94104-4704
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 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 6,084,000
I
By Housatonic Micro Fund SBIC, L.P. (1)
Common Stock 2,248,829
I
By Housatonic Equity Investors IV, L.P. (2)
Common Stock 1,116,000
I
By Housatonic Equity Investors SBIC, L.P. (3)
Common Stock 103,671
I
By Housatonic Equity Affiliates IV, L.P. (4)

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
Reynolds Barry D.
C/O HOUSATONIC PARTNERS
44 MONTGOMERY STREET, SUITE 4010
SAN FRANCISCO, CA 94104-4704
  X      

Signatures

/s/ Barry D. Reynolds 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) The securities are owned by Housatonic Micro Fund SBIC, L.P. ("HMF SBIC"). The Reporting Person is a Manager of Housatonic Micro Partners SBIC, L.L.C. ("HMP SBIC") which serves as the general partner of HMF SBIC. As such, the Reporting Person may be deemed to have indirect beneficial ownership of the shares held by HMF SBIC. The Reporting Person disclaims beneficial ownership of these securities except to the extent of his proportionate pecuniary interest therein.
(2) The securities are owned by Housatonic Equity Investors IV, L.P. ("HEI IV"). The Reporting Persons is a Manager of Housatonic Equity Partners IV, L.L.C. ("HEP IV") which serves as the general partner of HEI IV. As such, the Reporting Person may be deemed to have indirect beneficial ownership of the shares held by HEI IV. The Reporting Person disclaims beneficial ownership of these securities except to the extent of his proportionate pecuniary interest therein.
(3) The securities are owned by Housatonic Equity Investors SBIC, L.P. ("HEI SBIC"). The Reporting Person is a Manager of Housatonic Equity Partners SBIC, L.L.C. ("HEP SBIC") which serves as the general partner of HEI SBIC. As such, the Reporting Person may be deemed to have indirect beneficial ownership of the shares held by HEI SBIC. The Reporting Person disclaims beneficial ownership of these securities except to the extent of his proportionate pecuniary interest therein.
(4) The securities are owned by Housatonic Equity Affiliates IV, L.P. ("HEA IV"). The Reporting Persons is a Manager of HEP IV which serves as the general partner of HEA IV. As such, the Reporting Person may be deemed to have indirect beneficial ownership of the shares held by HEA IV. The Reporting Person disclaims beneficial ownership of these securities except to the extent of his proportionate pecuniary interest therein.

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