X0508 4 2026-03-01 0 0001819796 GCM Grosvenor Inc. GCMG 0001684847 SULLIVAN KATHLEEN PATRICIA 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 2026-03-01 4 M 0 13409 A 71604 D Restricted Stock Units 2026-03-01 4 M 0 13409 0 D Class A Common Stock 13409 0 D Restricted Stock Units 2026-03-01 4 A 0 30435 0 A Class A Common Stock 30435 30435 D Each Restricted Stock Unit ("RSU") represents the contingent right to receive one share of Class A Common Stock of the Issuer. Represents a grant of RSUs under the Issuer's Amended and Restated 2020 Incentive Award Plan that was made on November 15, 2025. The RSUs vested in full on March 1, 2026, and delivery of Class A Common Stock in settlement of vested RSUs will occur on the delivery date set forth in the applicable award agreement unless the Issuer elects to settle the RSUs in cash, or a combination of Class A Common Stock and cash, in the Issuer's sole discretion. Represents a grant of RSUs under the Issuer's Amended and Restated 2020 Incentive Award Plan on March 1, 2026. The RSUs will vest in three equal installments on May 15, 2027, May 15, 2028 and May 15, 2029, subject to the Reporting Person's continued service through the applicable vesting date. Delivery of Class A Common Stock in settlement of vested RSUs will occur on the delivery date set forth in the applicable award agreement. /s/ Burke Montgomery, Attorney-in-Fact 2026-03-03