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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K ( Mark One ) Annual report pursuant to section 13 or 15 ( d ) of the Securities Exchange Act of 1934 For the Fiscal Year Ended December 31 , 2020 0 Transition report pursuant to section 13 or 15 ( d ) of the Securities Exchange Act of 1934 For the Transition Period from to Commission File Number 001-37397 Rimini Street , Inc. ( Exact name of registrant as specified in its charter ) Delaware ( State or other jurisdiction of incorporation or organization ) 3993 Howard Hughes Parkway , Suite 500 , Las Vegas , NV ( Address of principal executive offices ) Registrant's telephone number , including area code : Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) RMNI Title of each class : Common Stock , par value $ 0.0001 per share Public Units , each consisting of one share of Common Stock , $ 0.0001 par value , and one - half of one Warrant Warrants , exercisable for one share of Common Stock , $ 0.0001 par value RMNIU 36-4880301 ( I.R.S. Employer Identification No. ) 89169 ( Zip Code ) 702 839-9671 Name of each exchange on which registered : The Nasdaq Global Market OTC Pink Current Information Marketplace RMNIW OTC Pink Current Information Marketplace Securities registered pursuant to Section 12 ( g ) of the Act : None Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes No Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Yes No Indicate by check mark whether the Registrant ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 during the preceding 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes No Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T ( §232.405 of this chapter ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . Yes No Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , a smaller reporting company , and an emerging growth company . See the definitions of " large accelerated filer " , " accelerated filer ” , “ smaller reporting company " , and " emerging growth company " in Rule 12b - 2 of the Exchange Act . Large accelerated filer Accelerated filer þ Smaller reporting company Emerging growth company Non - accelerated filer If an emerging growth company , indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13 ( a ) of the Exchange Act . Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404 ( b ) of the Sarbanes - Oxley Act ( 15 U.S.C. 7262 ( b ) ) by the registered public