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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 ( 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 OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 001-39716 Delaware ( State of Incorporation ) 900 North Michigan Avenue , Suite 1100 Chicago , IL ( Address of principal executive offices ) Securities registered pursuant to Section 12 ( b ) of the Act : Title of each class Class A common stock , $ 0.0001 par value per share Warrants to purchase shares of Class A common stock Securities registered pursuant to section 12 ( g ) of the Act : None . Large accelerated filer Non - accelerated filer FORM 10 - K None . GCM Grosvenor Inc. ( Exact Name of Registrant as Specified in Its Charter ) 312-506-6500 Registrant's telephone number , including area code || Trading Symbol ( s ) GCMG GCMGW No Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes 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 85-2226287 ( IRS Employer Identification 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 or 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 . Accelerated filer Smaller reporting company Emerging growth company 60611 ( Zip Code ) Name of each exchange on which registered The Nasdaq Stock Market LLC The Nasdaq Stock Market LLC ☐ ☐ > If an emerging growth company , indicate by check mark if the registrant has elected not to use the extended transition financial accounting standards provided pursuant to Section 13 ( a ) of the Exchange Act . □ period for complying with any new or revised 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 accounting firm that prepared or issued its audit report . Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Act ) . Yes No The registrant was not a public company as of the last business day of its most recently completed second fiscal quarter and , therefore , cannot calculate the aggregate market value of its voting and non - voting common equity held by non - affiliates as of such date . As of March 9 , 2021 , there were 41,603,993 shares of the registrant's Class A common stock , par value $ 0.0001 per share , outstanding and 144,235,246 shares of the registrant's Class C common stock , par value $ 0.0001 per share , outstanding . DOCUMENTS INCORPORATED BY REFERENCE