Sec Form 3 Filing - Naughton Michael Damien @ SERVICESOURCE INTERNATIONAL, INC. - 2020-08-07

FORM 3 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP 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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1. Name and Address of Reporting Person Naughton Michael Damien 2. Issuer Name and Ticker or Trading Symbol SERVICESOURCE INTERNATIONAL, INC. [ SREV] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) EVP (Last) (First) (Middle) C/O SERVICESOURCE INTERNATIONAL, INC., 707 17TH STREET, 25TH FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 08/07/2020 (Street) DENVER, CO80202 4. If Amendment, Date Original Filed (MM/DD/YY) 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 Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 235,000 ( 1 ) D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Employee Stock Option (right to buy) $ 4.06 ( 2 ) 05/08/2024 Common Stock 16,000 D Employee Stock Option (right to buy) $ 5.46 ( 3 ) 07/20/2025 Common Stock 21,000 D Employee Stock Option (right to buy) $ 5.44 ( 4 ) 08/12/2025 Common Stock 20,000 D Employee Stock Option (right to buy) $ 3.9 ( 5 ) 02/17/2026 Common Stock 5,000 D Employee Stock Option (right to buy) $ 0.92 ( 6 ) 09/01/2029 Common Stock 50,000 D Employee Stock Option (right to buy) $ 6.03 ( 7 ) 02/07/2022 Common Stock 4,424 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Naughton Michael Damien C/O SERVICESOURCE INTERNATIONAL, INC. 707 17TH STREET, 25TH FLOOR DENVER, CO80202 EVP Signatures /s/ Patricia A. Elias, by power of attorney 08/17/2020 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The reported shares are represented by restricted stock units, or RSUs, that vest as follows: (a) 12,500 RSUs that were granted on October 10, 2016 and vest on August 17, 2020, (b) 15,000 RSUs that were granted on May 16, 2017 and vest on May 16, 2021, (c) 32,500 RSUs that were granted on May 15, 2018 and vest in two equal installments on May 15, 2021 and May 15, 2022, (d) 75,000 RSUs that were granted on December 7, 2018 and vest in three equal installments on December 7, 2020, December 7, 2021 and December 17, 2022, and (e) 100,000 RSUs that were granted on September 1, 2019 and vest in three equal installments on September 1, 2020, September 1, 2021 and September 1, 2022. ( 2 )One-fourth of the shares subject to the option vested on May 1, 2015 and one thirty-sixth of the remaining shares subject to the option vested monthly thereafter. ( 3 )One-third of the shares subject to the option vested on July 20, 2016 and one twenty-fourth of the remaining shares subject to the option vested monthly thereafter. ( 4 )One-fourth of the shares subject to the option vested on August 12, 2016 and one thirty-sixth of the remaining shares subject to the option vested monthly thereafter. ( 5 )One-third of the shares subject to the option vested on February 17, 2017 and one twenty-fourth of the remaining shares subject to the option vested monthly thereafter. ( 6 )The shares subject to the option vest in three equal installments on September 1, 2020, September 1, 2021, and September 1, 2022. ( 7 )One-fourth of the shares subject to the option vested on February 7, 2013 and one thirty-sixth of the remaining shares subject to the option vested monthly thereafter.

Remarks: Exhibit ListExhibit 24 - Power of Attorney

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