Sec Form 4 Filing - Salaets Steven @ Rimini Street, Inc. - 2021-05-07

FORM 4 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 Salaets Steven 2. Issuer Name and Ticker or Trading Symbol Rimini Street, Inc. [ RMNI] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) CIO/CPO EVP GlSec/Facl/Qual/IA (Last) (First) (Middle) C/O 3993 HOWARD HUGHES PARKWAY, SUITE 500 3. Date of Earliest Transaction (MM/DD/YY) 05/07/2021 (Street) LAS VEGAS, NV89169 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 05/07/2021 M 8,333 A 81,442 D Common Stock 05/07/2021 S( 3 ) 2,912 D ( 3 ) $ 7.71 78,530 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 Restricted Stock Unit ( 1 ) 05/07/2021 M 8,333 ( 2 ) ( 2 ) Common Stock 8,333 $ 0 8,334 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Salaets Steven C/O 3993 HOWARD HUGHES PARKWAY SUITE 500 LAS VEGAS, NV89169 CIO/CPO EVP GlSec/Facl/Qual/IA Signatures /s/Daniel B. Winslow, as Attorney-in-Fact 05/11/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Each Restricted Stock Unit represents a contingent right to receive one share of the Issuer's Common Stock upon vesting. ( 2 )On May 7, 2019, the Reporting Person was granted 25,000 Restricted Stock Units, two-thirds of which vested ratably on May 7, 2020 and May 7, 2021, respectively. The remaining one-third vests on May 7, 2022, subject to the Reporting Person's continued service as an employee of the Issuer through the vesting date ( 3 )Reported transaction is an automatically-triggered "sell-to-cover" transaction related to the payment of withholding tax obligations pursuant to the Issuer's policy for tax withholdings associated with Restricted Stock Unit vesting events.

Remarks: Reported transaction is an automatically-triggered "sell-to-cover" transaction related to the payment of withholding tax obligations pursuant to the Issuer's policy for tax withholdings associated with Restricted Stock Unit vesting events.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(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).

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