X0609 4 2026-05-31 0 0001819796 GCM Grosvenor Inc. GCMG 0001684847 SULLIVAN KATHLEEN PATRICIA false C/O GCM GROSVENOR INC. 900 NORTH MICHIGAN AVENUE, SUITE 1100 CHICAGO IL 60611 0 1 0 0 Principal Accounting Officer 0 Class A Common Stock 2026-05-31 4 M 0 12500 A 78506 D Class A Common Stock 2026-05-31 4 M 0 12121 A 90627 D Class A Common Stock 2026-05-31 4 M 0 9114 A 99741 D Class A Common Stock 2026-05-31 4 F 0 14946 10.63 D 84795 D Restricted Stock Units 2026-05-31 4 M 0 12500 0 D Class A Common Stock 12500 0 D Restricted Stock Units 2026-05-31 4 M 0 12121 0 D Class A Common Stock 12121 12122 D Restricted Stock Units 2026-05-31 4 M 0 9114 0 D Class A Common Stock 9114 18230 D Represents restricted stock units ("RSUs") that were granted under the Issuer's 2020 Incentive Award Plan on March 1, 2023. 12,500 RSUs vested on May 31, 2024, 12,500 RSUs vested on May 31, 2025 and 12,500 RSUs vested on May 31, 2026. 12,500 shares of Class A Common Stock of the Issuer were delivered to the Reporting Person in settlement of 12,500 vested RSUs on May 31, 2026. Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer. Represents RSUs that were granted under the Issuer's Amended and Restated 2020 Incentive Award Plan on March 1, 2024. 12,121 RSUs vested on May 31, 2025, 12,121 RSUs vested on May 31, 2026 and 12,122 RSUs will vest on May 31, 2027, subject to the Reporting Person's continued service through the applicable vesting date. 12,121 shares of Class A Common Stock of the Issuer were delivered to the Reporting Person in settlement of 12,121 vested RSUs on May 31, 2026. Represents RSUs that were granted under the Issuer's Amended and Restated 2020 Incentive Award Plan on March 1, 2025. 9,114 RSUs vested on May 31, 2026, 9,114 RSUs will vest on May 31, 2027 and 9,116 RSUs will vest on May 31, 2028, subject to the Reporting Person's continued service through the applicable vesting date. 9,114 shares of Class A Common Stock of the Issuer were delivered to the Reporting Person in settlement of 9,114 vested RSUs on May 31, 2026. Represents shares of Class A Common Stock that have been withheld by the Issuer to satisfy tax withholding obligations in connection with the net settlement of RSUs that vested on May 31, 2026. The shares withheld represent a reduction of shares issued to the Reporting Person upon settlement of vested RSUs and do not constitute any open-market sale. /s/ Burke Montgomery, Attorney-in-Fact 2026-06-02