Sandra M. Buchanan - 31 May 2025 Form 4 Insider Report for GCM Grosvenor Inc. (GCMG)

Role: Chief HR Officer
Signature: /s/ Burke Montgomery, Attorney-in-Fact
Issuer symbol: GCMG
Transactions as of: 31 May 2025
Net transactions value: -$169,075
Form type: 4
Filing time: 03 Jun 2025, 16:24:28 UTC
Previous filing: 18 Apr 2025
Next filing: 20 Jun 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Buchanan Sandra M	Chief HR Officer	C/O GCM GROSVENOR INC., 900 NORTH MICHIGAN AVENUE, SUITE 1100, CHICAGO	/s/ Burke Montgomery, Attorney-in-Fact	03 Jun 2025	0001831816

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	GCMG	Class A Common Stock	Options Exercise		+13,333	+39%		47,835	31 May 2025	Direct	F1, F2
transaction	GCMG	Class A Common Stock	Options Exercise		+12,929	+27%		60,764	31 May 2025	Direct	F2, F3
transaction	GCMG	Class A Common Stock	Tax liability	$169,075	-13,408	-22%	$12.61	47,356	31 May 2025	Direct	F4

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	-13,333	-50%	$0.000000	13,334	31 May 2025	Class A Common Stock	13,333		Direct	F1, F2
transaction	GCMG	Restricted Stock Units	Options Exercise	$0	-12,929	-33%	$0.000000	25,859	31 May 2025	Class A Common Stock	12,929		Direct	F2, F3

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

Explanation of Responses:

Id	Content
F1	Represents restricted stock units ("RSUs") that were granted under the Issuer's 2020 Incentive Award Plan on March 1, 2023. 13,333 RSUs vested on May 31, 2024, 13,333 RSUs vested on May 31, 2025 and 13,334 will vest on May 31, 2026, subject to the Reporting Person's continued service through the vesting date. 13,333 shares of Class A Common Stock of the Issuer were delivered to the Reporting Person in settlement of 13,333 vested RSUs on May 31, 2025.
F2	Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer.
F3	Represents RSUs that were granted under the Issuer's Amended and Restated 2020 Incentive Award Plan on March 1, 2024. 12,929 RSUs vested on May 31, 2025, 12,929 RSUs will vest on May 31, 2026 and 12,930 RSUs will vest on May 31, 2027, subject to the Reporting Person's continued service through the applicable vesting date. 12,929 shares of Class A Common Stock of the Issuer were delivered to the Reporting Person in settlement of 12,929 vested RSUs on May 31, 2025.
F4	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, 2025. 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.