Kathleen Patricia Sullivan - 01 Mar 2026 Form 4 Insider Report for GCM Grosvenor Inc. (GCMG)

Role: Principal Accounting Officer
Signature: /s/ Burke Montgomery, Attorney-in-Fact
Issuer symbol: GCMG
Transactions as of: 01 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 03 Mar 2026, 16:45:54 UTC
Previous filing: 16 Jan 2026
Next filing: 12 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
SULLIVAN KATHLEEN PATRICIA	Principal Accounting Officer	C/O GCM GROSVENOR INC., 900 NORTH MICHIGAN AVENUE, SUITE 1100, CHICAGO	/s/ Burke Montgomery, Attorney-in-Fact	03 Mar 2026	0001684847

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	GCMG	Class A Common Stock	Options Exercise		+13,409	+23%		71,604	01 Mar 2026	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	GCMG	Restricted Stock Units	Options Exercise	$0	-13,409	-100%	$0.000000	0	01 Mar 2026	Class A Common Stock	13,409		Direct	F1, F2
transaction	GCMG	Restricted Stock Units	Award	$0	+30,435		$0.000000	30,435	01 Mar 2026	Class A Common Stock	30,435		Direct	F1, F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Each Restricted Stock Unit ("RSU") represents the contingent right to receive one share of Class A Common Stock of the Issuer.
F2	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.
F3	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.