UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

(Rule 13d-101)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO

RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a)

ServiceSource International, Inc.

(Name of Issuer)

Common Stock, par value $0.0001 per share

(Title of Class of Securities)

      81763U100      

(CUSIP Number)

Toby E. Symonds

President

Altai Capital Management, L.P.

152 West 57th Street, 10th Floor

New York, New York  10019

212-201-5763

With a copy to:

Steven J. Williams

Paul, Weiss, Rifkind, Wharton & Garrison LLP

1285 Avenue of the Americas

New York, New York  10019

     212-373-3000    

(Name, Address and Telephone Number of Person

Authorized to Receive Notices and Communications)

           June 18, 2014          

(Date of Event Which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition which is the subject of this Schedule 13D, and is filing this schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following box o.

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits.  See Rule 13d-7 for other parties to whom copies are to be sent.

*The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

CUSIP No. 81763U100 SCHEDULE 13D Page 2 of 12

1	NAME OF REPORTING PERSON OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Altai Capital Management, L.P.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP	(a)  o (b)  x
3	SEC USE ONLY
4	SOURCE OF FUNDS AF
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)	o
6	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 0
	8	SHARED VOTING POWER 8,227,000
	9	SOLE DISPOSITIVE POWER 0
	10	SHARED DISPOSITIVE POWER 8,227,000

11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 8,227,000
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES	o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 9.9%
14	TYPE OF REPORTING PERSON IA, PN

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CUSIP No. 81763U100 SCHEDULE 13D Page 3 of 12

1	NAME OF REPORTING PERSON OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Altai Capital Management, LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP	(a)  o (b)  x
3	SEC USE ONLY
4	SOURCE OF FUNDS AF
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)	o
6	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 0
	8	SHARED VOTING POWER 8,227,000
	9	SOLE DISPOSITIVE POWER 0
	10	SHARED DISPOSITIVE POWER 8,227,000

11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 8,227,000
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES	o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 9.9%
14	TYPE OF REPORTING PERSON HC, OO

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CUSIP No. 81763U100 SCHEDULE 13D Page 4 of 12

1	NAME OF REPORTING PERSON OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Rishi Bajaj
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP	(a)  o (b)  x
3	SEC USE ONLY
4	SOURCE OF FUNDS AF
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)	o
6	CITIZENSHIP OR PLACE OF ORGANIZATION United States of America

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 0
	8	SHARED VOTING POWER 8,227,000
	9	SOLE DISPOSITIVE POWER 0
	10	SHARED DISPOSITIVE POWER 8,227,000

11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 8,227,000
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES	o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 9.9%
14	TYPE OF REPORTING PERSON HC, IN

4

CUSIP No. 81763U100 SCHEDULE 13D Page 5 of 12

1	NAME OF REPORTING PERSON OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Toby E. Symonds
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP	(a)  o (b)  x
3	SEC USE ONLY
4	SOURCE OF FUNDS AF
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)	o
6	CITIZENSHIP OR PLACE OF ORGANIZATION United States of America

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 0
	8	SHARED VOTING POWER 8,227,000
	9	SOLE DISPOSITIVE POWER 0
	10	SHARED DISPOSITIVE POWER 8,227,000

11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 8,227,000
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES	o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 9.9%
14	TYPE OF REPORTING PERSON HC, IN

5

CUSIP No. 81763U100 SCHEDULE 13D Page 6 of 12

1	NAME OF REPORTING PERSON OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Steven V. Tesoriere
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP	(a)  o (b)  x
3	SEC USE ONLY
4	SOURCE OF FUNDS AF
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)	o
6	CITIZENSHIP OR PLACE OF ORGANIZATION United States of America

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 0
	8	SHARED VOTING POWER 8,227,000
	9	SOLE DISPOSITIVE POWER 0
	10	SHARED DISPOSITIVE POWER 8,227,000

11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 8,227,000
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES	o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 9.9%
14	TYPE OF REPORTING PERSON HC, IN

6

CUSIP No. 81763U100 SCHEDULE 13D Page 7 of 12

This Schedule 13D reflects the beneficial ownership of the Reporting Persons (as defined below) as of June 27, 2014.

ITEM 1.  Security and Issuer.

This Statement on Schedule 13D (the “Schedule 13D”) relates to the shares of common stock, par value $0.0001 per share (the “Common Stock”) of ServiceSource International, Inc. a Delaware corporation (the “Issuer”).  The Issuer’s principal executive office is located at 634 Second Street, San Francisco, CA 94107.

ITEM 2.  Identity and Background.

(a)           This Schedule 13D is filed by: (i) Altai Capital Management, L.P., a Delaware limited partnership registered as an investment adviser with the U.S. Securities and Exchange Commission (“Investment Manager”); (ii) Altai Capital Management, LLC, a Delaware limited liability company (“IMGP”);  (iii) Mr. Rishi Bajaj (“Mr. Bajaj”); (iv) Toby E. Symonds (“Mr. Symonds”); and (v) Mr. Steven V. Tesoriere (“Mr. Tesoriere”).

Each of the foregoing is referred to as a “Reporting Person” and collectively as, the “Reporting Persons.”  Each of the Reporting Persons is party to a Joint Filing Agreement, which is attached hereto as Exhibit A.  Accordingly, the Reporting Persons are hereby filing this joint Schedule 13D.

This Schedule 13D relates to the Common Stock held for the account of Altai Capital Master Fund, Ltd., a Cayman Islands exempted company (“ACMF”). Investment Manager serves as investment manager to ACMF.  Each of Investment Manager, IMGP, Mr. Bajaj, Mr. Symonds and Mr. Tesoriere may be deemed to have voting and dispositive power over the Common Stock held for the account of ACMF.

(b)           The address of the principal business office of each Reporting Person is 152 West 57th Street, 10th Floor, New York, NY 10019.

(c)           The principal business of Investment Manager is serving as the investment manager of certain investment funds, including ACMF.  The principal business of IMGP is serving as the general partner of Investment Manager.  The principal business of Mr. Bajaj is serving as managing principal of Investment Manager and member of IMGP.  The principal business of Mr. Symonds is serving as president and managing principal of Investment Manager and member of IMGP.  The principal business of Mr. Tesoriere is serving as managing principal of Investment Manager and member of IMGP.

(d)           None of the Reporting Persons has, during the last five years, been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors).

(e)           None of the Reporting Persons has, during the last five years, been party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

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CUSIP No. 81763U100 SCHEDULE 13D Page 8 of 12

(f)            Mr. Bajaj is a citizen of the United States of America.  Mr. Symonds is a citizen of the United States of America.  Mr. Tesoriere is a citizen of the United States of America.

ITEM 3.  Source and Amount of Funds or Other Consideration.

The Reporting Persons used approximately $42,144,760 (including brokerage commissions) in the aggregate to purchase the Common Stock for the account of ACMF.

The source of the funds used to acquire the Common Stock reported herein is the working capital available to ACMF and margin borrowings described in the following sentence. Such shares of Common Stock are held by ACMF in margin accounts, which may extend margin credit to ACMF from time to time, subject to applicable federal margin regulations, stock exchange rules and credit policies. In such instances, the positions held in the margin account are pledged as collateral security for the repayment of debit balances in the account. The margin accounts bear interest at a rate based upon the broker’s call rate from time to time in effect. Because other securities are held in the margin accounts, it is not possible to determine the amounts, if any, of margin used to purchase the Common Stock reported herein.

ITEM 4.  Purpose of Transaction.

The Common Stock held for the account of ACMF was acquired in the ordinary course of the Reporting Persons’ business of purchasing, selling and trading in securities.

Depending upon market conditions and other factors that it may deem material, the Reporting Persons may purchase additional securities of the Issuer, including shares of Common Stock and/or related securities or may dispose of all or a portion of the Common Stock or securities that it now beneficially owns or may hereafter acquire.

The Reporting Persons have engaged and may in the future engage in discussions with and/or meet with management, the Board of Directors of the Issuer (the “Board”), potential acquirers, financing sources and other shareholders and/or formulate plans or proposals regarding the Issuer or its securities. As part of such activities, the Reporting Persons may take positions or make proposals with respect to potential changes in the operations, management, Board of Directors composition, ownership, capital structure, strategy and future plans of the Issuer as a means of enhancing shareholder value.  Such suggestions or positions may include one or more plans or proposals that relate to or would result in any of the actions required to be reported herein.

Except as set forth herein, the Reporting Persons have no present plan or proposal that relate to or that would result in any of the matters set forth in subparagraph (a)-(j) of Item 4 of Schedule 13D.  The Reporting Persons have not entered into any agreement with any third party to act together for the purpose of acquiring, holding, voting or disposing of the shares of Common Stock reported herein.  Depending on various factors including, without limitation, the Issuer’s financial position and strategic direction, the outcome of the discussions and actions referenced above, actions taken by the Board, price levels of the Common Stock, other investment opportunities available to the Reporting Persons or their affiliates, conditions in the securities market and general economic and industry conditions, the Reporting Persons may in the future take such actions with respect to their investment in the Issuer as they deem appropriate including, without limitation, purchasing additional shares of Common Stock or selling some or all of their shares of Common Stock, engaging in short selling of or any hedging or similar transactions with respect to the shares of Common Stock, voting for or against and expressing support for or against any proposals of the Board or other shareholders of the Issuer and/or otherwise changing their intention with respect to any and all matters referred to in Item 4 of Schedule 13D.

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CUSIP No. 81763U100 SCHEDULE 13D Page 9 of 12

ITEM 5.  Interest in Securities of the Issuer.

(a) The aggregate number and percentage of shares of Common Stock to which this Schedule 13D relates is 8,227,000 shares of Common Stock held for the account of ACMF, constituting approximately 9.9% of the Issuer’s currently outstanding Common Stock. The aggregate number and percentage of shares of Common Stock reported herein are based upon the 83,101,098 shares of Common Stock outstanding as of April 30, 2014, as reported in the Issuer’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2014, filed with the Securities and Exchange Commission on May 7, 2014.

(i)        Investment Manager:

(a) As of the date hereof, Investment Manager may be deemed the beneficial owner of 8,227,000 shares of Common Stock.

Percentage: Approximately 9.9% as of the date hereof.

(b) 1. Sole power to vote or direct vote: 0

2. Shared power to vote or direct vote: 8,227,000 shares of Common Stock

3. Sole power to dispose or direct the disposition: 0

4. Shared power to dispose or direct the disposition: 8,227,000 shares of Common Stock

(ii)       IMGP:

(a) As of the date hereof, IMGP may be deemed the beneficial owner of 8,227,000 shares of Common Stock.

Percentage: Approximately 9.9% as of the date hereof.

(b) 1. Sole power to vote or direct vote: 0

2. Shared power to vote or direct vote: 8,227,000 shares of Common Stock

3. Sole power to dispose or direct the disposition: 0

4. Shared power to dispose or direct the disposition: 8,227,000 shares of Common Stock

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CUSIP No. 81763U100 SCHEDULE 13D Page 10 of 12

(iii)      Mr. Bajaj:

(a) As of the date hereof, Mr. Bajaj may be deemed the beneficial owner of 8,227,000 shares of Common Stock.

Percentage: Approximately 9.9% as of the date hereof.

(b) 1. Sole power to vote or direct vote: 0

2. Shared power to vote or direct vote: 8,227,000 shares of Common Stock

3. Sole power to dispose or direct the disposition: 0

4. Shared power to dispose or direct the disposition: 8,227,000 shares of Common Stock

(iv)      Mr. Symonds:

(a) As of the date hereof, Mr. Symonds may be deemed the beneficial owner of 8,227,000 shares of Common Stock.

Percentage: Approximately 9.9% as of the date hereof.

(b) 1. Sole power to vote or direct vote: 0

2. Shared power to vote or direct vote: 8,227,000 shares of Common Stock

3. Sole power to dispose or direct the disposition: 0

4. Shared power to dispose or direct the disposition: 8,227,000 shares of Common Stock

(v)       Mr. Tesoriere:

(a) As of the date hereof, Mr. Tesoriere may be deemed the beneficial owner of 8,227,000 shares of Common Stock.

Percentage: Approximately 9.9% as of the date hereof.

(b) 1. Sole power to vote or direct vote: 0

2. Shared power to vote or direct vote: 8,227,000 shares of Common Stock

3. Sole power to dispose or direct the disposition: 0

4. Shared power to dispose or direct the disposition: 8,227,000 shares of Common Stock

(b) By virtue of its role as investment manager of ACMF, Investment Manager has the power to vote or direct the voting, and to dispose or direct the disposition, of all of the 8,227,000 shares of Common Stock beneficially owned by it and held for the account of ACMF. By virtue of its role as general partner of Investment Manager, IMGP is deemed to have shared voting power and shared dispositive power with respect to all Common Stock as to which Investment Manager has voting power or dispositive power and held for the account of ACMF. By virtue of his role as managing principal of Investment Manager and member of IMGP, Mr. Bajaj is deemed to have shared voting power and shared dispositive power with respect to all Common Stock as to which Investment Manager has voting power or dispositive power and held for the account of ACMF. By virtue of his role as president and managing principal of Investment Manager and member of IMGP, Mr. Symonds is deemed to have shared voting power and shared dispositive power with respect to all Common Stock as to which Investment Manager has voting power or dispositive power and held for the account of ACMF. By virtue of his role as managing principal of Investment Manager and member of IMGP, Mr. Tesoriere is deemed to have shared voting power and shared dispositive power with respect to all Common Stock as to which Investment Manager has voting power or dispositive power and held for the account of ACMF.

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CUSIP No. 81763U100 SCHEDULE 13D Page 11 of 12

(c) Information concerning transactions in the Common Stock effected by the Reporting Persons during the past sixty days is set forth in Schedule 1 hereto and is incorporated herein by reference. Unless otherwise indicated, all of such transactions were effected in the open market.

(d) ACMF has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, more than 5% of the shares of Common Stock covered by this Schedule 13D that may be deemed to be beneficially owned by the Reporting Persons.

(e) Not applicable

ITEM 6.  Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.

The Reporting Persons are parties to an agreement with respect to the joint filing of this Schedule 13D and any amendments thereto. A copy of such agreement is attached as Exhibit A to this Schedule 13D and is incorporated by reference herein. Other than the joint filing agreement, there are no contracts, arrangements, understandings or relationships among the Reporting Persons or between the Reporting Persons and any other person with respect to securities of the Issuer.

ITEM 7.  Material to be Filed as Exhibits.

Exhibit A - Joint Filing Agreement

Schedule 1 - Transactions of the Reporting Persons Effected During the Past 60 Days

11

CUSIP No. 81763U100 SCHEDULE 13D Page 12 of 12

SIGNATURES

After reasonable inquiry and to the best of its knowledge and belief, the undersigned each certifies that the information set forth in this statement is true, complete and correct.

Dated:  June 27, 2014

ALTAI CAPITAL MANAGEMENT, L.P.
By:	/s/ Toby E. Symonds
Name:	Toby E. Symonds
Title:	Authorized Signatory
ALTAI CAPITAL MANAGEMENT, LLC
By:	/s/ Toby E. Symonds
Name:	Toby E. Symonds
Title:	Authorized Signatory
/s/ Rishi Bajaj
Name:	Rishi Bajaj
/s/ Toby E. Symonds
Name:	Toby E. Symonds
/s/ Steven V. Tesoriere
Name:	Steven V. Tesoriere

12

EXHIBIT A

JOINT FILING AGREEMENT

The undersigned hereby agree that the statement on Schedule 13D with respect to the common stock of ServiceSource International, Inc. dated June 27, 2014 is, and any further amendments thereto signed by each of the undersigned shall be, filed on behalf of each of the undersigned pursuant to and in accordance with the provisions of Rule 13d-1(f) under the Securities Exchange Act of 1934, as amended.

Dated:  June 27, 2014

ALTAI CAPITAL MANAGEMENT, L.P.
By:	/s/ Toby E. Symonds
Name:	Toby E. Symonds
Title:	Authorized Signatory
ALTAI CAPITAL MANAGEMENT, LLC
By:	/s/ Toby E. Symonds
Name:	Toby E. Symonds
Title:	Authorized Signatory
/s/ Rishi Bajaj
Name:	Rishi Bajaj
/s/ Toby E. Symonds
Name:	Toby E. Symonds
/s/ Steven V. Tesoriere
Name:	Steven V. Tesoriere

13

SCHEDULE 1

Transactions of the Reporting Persons Effected

During the Past 60 Days

The following transactions were effected during the past sixty (60) days:

Person	Date	Security	Amount of Shs. Bought (Sold)	Approx. Price per Share (excl. commissions)
ACMF	5/22/2014	Common	75,600	4.2266
ACMF	5/22/2014	Common	67,300	4.2550
ACMF	5/22/2014	Common	79,411	4.2259
ACMF	5/23/2014	Common	382,000	4.3000
ACMF	5/27/2014	Common	300,000	4.6350
ACMF	5/27/2014	Common	250,000	4.5743
ACMF	5/28/2014	Common	100,000	4.5300
ACMF	5/28/2014	Common	185,266	4.5779
ACMF	5/29/2014	Common	112,848	4.6012
ACMF	5/30/2014	Common	200,000	4.5517
ACMF	6/02/2014	Common	224,558	4.4626
ACMF	6/03/2014	Common	99,526	4.4808
ACMF	6/03/2014	Common	53,000	4.5000
ACMF	6/04/2014	Common	149,943	4.5782
ACMF	6/05/2014	Common	280,182	4.6476
ACMF	6/06/2014	Common	31,719	4.7706
ACMF	6/09/2014	Common	91,823	4.9285
ACMF	6/10/2014	Common	32,750	5.0290
ACMF	6/11/2014	Common	75,000	5.0000
ACMF	6/11/2014	Common	114,118	4.9574
ACMF	6/12/2014	Common	399,148	5.0469
ACMF	6/12/2014	Common	75,000	4.9800
ACMF	6/12/2014	Common	79,045	5.0171
ACMF	6/13/2014	Common	117,608	5.0347
ACMF	6/16/2014	Common	347,641	5.1097
ACMF	6/17/2014	Common	150,000	5.3267
ACMF	6/17/2014	Common	51,800	5.3648
ACMF	6/18/2014	Common	191,649	5.4468
ACMF	6/18/2014	Common	300,000	5.3493
ACMF	6/18/2014	Common	125,000	5.3800
ACMF	6/19/2014	Common	618,800	5.4483
ACMF	6/19/2014	Common	100,000	5.4200
ACMF	6/19/2014	Common	124,707	5.4505
ACMF	6/20/2014	Common	178,644	5.5300
ACMF	6/20/2014	Common	100,000	5.4599
ACMF	6/20/2014	Common	118,761	5.4895
ACMF	6/23/2014	Common	359,529	5.4924
ACMF	6/24/2014	Common	663,000	5.5263
ACMF	6/24/2014	Common	150,000	5.5000
ACMF	6/25/2014	Common	225,000	5.5333
ACMF	6/25/2014	Common	500,000	5.5100
ACMF	6/26/2014	Common	344,524	5.6000
ACMF	6/26/2014	Common	2,100	5.5776

All of the above transactions were effected on the open market.