GCM Grosvenor (GCMG) officer RSUs vest and 14,946 shares withheld for tax

Rhea-AI Filing Summary

GCM Grosvenor Inc. Principal Accounting Officer Kathleen Patricia Sullivan reported routine equity compensation activity tied to restricted stock units (RSUs). On May 31, 2026, 12,500 RSUs from a March 1, 2023 grant, 12,121 RSUs from a March 1, 2024 grant, and 9,114 RSUs from a March 1, 2025 grant vested, each RSU converting into one share of Class A Common Stock.

In connection with these vestings, the company withheld 14,946 shares of Class A Common Stock at $10.63 per share to satisfy tax withholding obligations. The filing notes that these withheld shares reduced the shares issued on settlement and did not involve any open-market sale.

Insider Trade Summary

33,735 shares exercised/converted

Mixed 7 txns

Insider SULLIVAN KATHLEEN PATRICIA

Role Principal Accounting Officer

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	12,500	$0.00	--
Exercise	Restricted Stock Units	12,121	$0.00	--
Exercise	Restricted Stock Units	9,114	$0.00	--
Exercise	Class A Common Stock	12,500	$0.00	--
Exercise	Class A Common Stock	12,121	$0.00	--
Exercise	Class A Common Stock	9,114	$0.00	--
Tax Withholding	Class A Common Stock	14,946	$10.63	$159K

Holdings After Transaction: Restricted Stock Units — 0 shares (Direct, null); Class A Common Stock — 78,506 shares (Direct, null)

Footnotes (1)

1. 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.

Key Figures

Shares withheld for taxes: 14,946 shares Tax withholding reference price: $10.63 per share 2023 grant RSUs vested: 12,500 RSUs +2 more

5 metrics

Shares withheld for taxes 14,946 shares Class A Common Stock withheld to satisfy tax obligations on May 31, 2026

Tax withholding reference price $10.63 per share Value used for 14,946 withheld Class A Common Stock shares

2023 grant RSUs vested 12,500 RSUs Vested May 31, 2024, 2025, and 2026 from March 1, 2023 grant; 12,500 shares delivered May 31, 2026

2024 grant RSUs vested 12,121 RSUs Vested May 31, 2025 and 2026 from March 1, 2024 grant; 12,121 shares delivered May 31, 2026

2025 grant RSUs vested 9,114 RSUs Vested May 31, 2026 from March 1, 2025 grant; 9,114 shares delivered May 31, 2026

Key Terms

Restricted Stock Units, Incentive Award Plan, Amended and Restated 2020 Incentive Award Plan, net settlement, +1 more

5 terms

Restricted Stock Units financial

"Represents restricted stock units ("RSUs") that were granted under the Issuer's 2020 Incentive Award Plan"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Incentive Award Plan financial

"granted under the Issuer's 2020 Incentive Award Plan on March 1, 2023"

An incentive award plan is a formal program that rewards employees, executives, or directors with cash, stock, options, or other pay when the company meets set goals or performance targets. Like a sales commission or a loyalty program that pays out when you hit milestones, it’s designed to align staff behavior with company objectives; investors care because it affects a company’s costs, share count (dilution), leadership incentives, and long-term value creation.

Amended and Restated 2020 Incentive Award Plan financial

"granted under the Issuer's Amended and Restated 2020 Incentive Award Plan on March 1, 2024"

net settlement financial

"to satisfy tax withholding obligations in connection with the net settlement of RSUs that vested on May 31, 2026"

tax withholding obligations financial

"shares of Class A Common Stock that have been withheld by the Issuer to satisfy tax withholding obligations"

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Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

SULLIVAN KATHLEEN PATRICIA

(Last) (First) (Middle)

C/O GCM GROSVENOR INC.

900 NORTH MICHIGAN AVENUE, SUITE 1100

(Street)

CHICAGO ILLINOIS 60611

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
GCM Grosvenor Inc. [ GCMG ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Principal Accounting Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/31/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	05/31/2026		M(1)		12,500	A	(2)	78,506	D
Class A Common Stock	05/31/2026		M(3)		12,121	A	(2)	90,627	D
Class A Common Stock	05/31/2026		M(4)		9,114	A	(2)	99,741	D
Class A Common Stock	05/31/2026		F		14,946(5)	D	$10.63	84,795	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	(2)	05/31/2026		M			12,500	(1)	(1)	Class A Common Stock	12,500	$0	0	D
Restricted Stock Units	(2)	05/31/2026		M			12,121	(3)	(3)	Class A Common Stock	12,121	$0	12,122	D
Restricted Stock Units	(2)	05/31/2026		M			9,114	(4)	(4)	Class A Common Stock	9,114	$0	18,230	D

Explanation of Responses:

1. 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.

2. Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer.

3. 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.

4. 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.

5. 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.

Remarks:

	/s/ Burke Montgomery, Attorney-in-Fact	06/02/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transactions did GCM Grosvenor (GCMG) report for Kathleen Patricia Sullivan?

GCM Grosvenor reported RSU vesting and related share movements for Principal Accounting Officer Kathleen Patricia Sullivan. Several restricted stock unit grants vested and converted into Class A Common Stock, with a portion of shares withheld by the company to cover associated tax obligations.

How many GCM Grosvenor (GCMG) shares were withheld for taxes in this Form 4?

The company withheld 14,946 shares of Class A Common Stock at $10.63 per share to satisfy tax withholding obligations. These shares represent a reduction in shares issued upon RSU settlement and are explicitly described as not involving any open-market sale.

Which RSU grants vested for the GCM Grosvenor (GCMG) officer on May 31, 2026?

RSUs from three grants vested on May 31, 2026: 12,500 RSUs from a March 1, 2023 grant, 12,121 RSUs from a March 1, 2024 grant, and 9,114 RSUs from a March 1, 2025 grant, each converting into one share of Class A Common Stock.

Did the GCM Grosvenor (GCMG) Form 4 show any open-market stock sales?

The Form 4 states that the 14,946 shares withheld for taxes were a reduction in shares issued upon RSU settlement and "do not constitute any open-market sale." The filing describes tax-withholding dispositions only, not discretionary market transactions.

What role does Kathleen Patricia Sullivan hold at GCM Grosvenor (GCMG)?

Kathleen Patricia Sullivan is identified as the company’s Principal Accounting Officer. The reported transactions relate to her equity compensation, specifically restricted stock units granted under GCM Grosvenor’s 2020 and Amended and Restated 2020 Incentive Award Plans.