Schedule 13G/A: Sacks and Affiliates Hold 72.8% of GCM Grosvenor Class A

Rhea-AI Filing Summary

GCM Grosvenor Inc.'s Schedule 13G/A discloses that Michael Jay Sacks and affiliated entities beneficially own 142,565,831 shares of Class A common stock, equal to 72.8% of the class. The filing itemizes holdings by reporting person, including Grosvenor Holdings, L.L.C. with 134,858,026 shares (71.7%), GCM Progress LLC and its subsidiary each with 90,155,396 shares (62.9%), GCM Grosvenor Management, LLC with 4,480,828 shares (7.8%), and Grosvenor Holdings II, L.L.C. with 3,226,977 shares (5.7%).

All reporting persons report 0 sole voting or dispositive power and record their positions as shared voting and shared dispositive power. The filing is a joint report by the named individuals and entities and includes signatures from Michael Jay Sacks as managing member for the entities listed.

Positive

• Detailed ownership disclosure: The filing lists exact share counts and percentages for each reporting person, including aggregate ownership of 142,565,831 shares (72.8%).
• Clear attribution across entities: Holdings are itemized by entity (e.g., Grosvenor Holdings, GCM Progress LLC, GCM Grosvenor Management) enabling transparent mapping of related-party positions.

Negative

• All reporting persons report 0 sole voting and dispositive power: Positions are recorded as shared voting and dispositive power only.
• High ownership concentration: A 72.8% combined beneficial stake indicates concentrated control, which may reduce the available public float and influence shareholder voting dynamics.

Insights

Corporate Governance Expert

TL;DR: This filing documents concentrated insider control: one individual and affiliates hold a clear majority of Class A shares.

The Schedule 13G/A shows Michael Jay Sacks and affiliated entities collectively beneficially own 142,565,831 Class A shares, or 72.8% of the class. That majority stake is recorded as shared voting and dispositive power, with 0 shares listed as sole voting or dispositive power for each reporting person. From a governance perspective, the filing transparently maps ownership across related entities and confirms centralized control through joint reporting.

Securities Analyst

TL;DR: The disclosure is material: public float is constrained by concentrated holdings, and ownership breakdown is explicitly itemized.

The document provides exact share counts and percentages for each reporting person: Grosvenor Holdings, L.L.C. 134,858,026 shares (71.7%), GCM Progress LLC 90,155,396 shares (62.9%), among others. All positions are reported as shared voting and dispositive power. These figures are directly relevant to investors assessing control, voting dynamics, and potential liquidity of the publicly held Class A shares.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 3)

GCM Grosvenor Inc.

(Name of Issuer)

Class A Common Stock, par value $0.0001

(Title of Class of Securities)

36831E108

(CUSIP Number)

06/30/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 36831E108

1

Names of Reporting Persons

Michael Jay Sacks

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 142,565,831.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 142,565,831.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

142,565,831.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

72.8 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

CUSIP No. 36831E108

1

Names of Reporting Persons

Grosvenor Holdings, L.L.C.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

ILLINOIS

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 134,858,026.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 134,858,026.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

134,858,026.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

71.7 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP No. 36831E108

1

Names of Reporting Persons

Grosvenor Holdings II, L.L.C.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 3,226,977.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 3,226,977.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,226,977.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.7 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP No. 36831E108

1

Names of Reporting Persons

GCM Grosvenor Management, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 4,480,828.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 4,480,828.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,480,828.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.8 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP No. 36831E108

1

Names of Reporting Persons

GCM Progress LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 90,155,396.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 90,155,396.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

90,155,396.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

62.9 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP No. 36831E108

1

Names of Reporting Persons

GCM Progress Subsidiary LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 90,155,396.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 90,155,396.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

90,155,396.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

62.9 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

Item 1.
(a)	Name of issuer: GCM Grosvenor Inc.
(b)	Address of issuer's principal executive offices: 900 North Michigan Avenue, Suite 1100, Chicago, IL 60611.
Item 2.
(a)	Name of person filing: Michael Jay Sacks Grosvenor Holdings, L.L.C. Grosvenor Holdings II, L.L.C. GCM Grosvenor Management, LLC GCM Progress LLC GCM Progress Subsidiary LLC
(b)	Address or principal business office or, if none, residence: The principal business address of the Reporting Persons is c/o GCM Grosvenor Inc., 900 North Michigan Avenue, Suite 1100, Chicago, IL 60611.
(c)	Citizenship: Grosvenor Holdings, L.L.C. is organized under the laws of the state of Illinois. Grosvenor Holdings II, L.L.C., GCM Grosvenor Management, LLC, GCM Progress LLC and GCM Progress Subsidiary LLC are each organized under the laws of the state of Delaware. Michael Jay Sacks is a citizen of the United States.
(d)	Title of class of securities: Class A Common Stock, par value $0.0001
(e)	CUSIP No.: 36831E108
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: Michael Jay Sacks - 142,565,831 Grosvenor Holdings, L.L.C. - 134,858,026 Grosvenor Holdings II, L.L.C. - 3,226,977 GCM Grosvenor Management, LLC - 4,480,828 GCM Progress LLC - 90,155,396 GCM Progress Subsidiary LLC - 90,155,396
(b)	Percent of class: Michael Jay Sacks - 72.8% Grosvenor Holdings, L.L.C. - 71.7% Grosvenor Holdings II, L.L.C. - 5.7% GCM Grosvenor Management, LLC - 7.8% GCM Progress LLC - 62.9% GCM Progress Subsidiary LLC - 62.9%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: Michael Jay Sacks - 0 Grosvenor Holdings, L.L.C. - 0 Grosvenor Holdings II, L.L.C. - 0 GCM Grosvenor Management, LLC - 0 GCM Progress LLC - 0 GCM Progress Subsidiary LLC - 0
	(ii) Shared power to vote or to direct the vote: Michael Jay Sacks - 142,565,831 Grosvenor Holdings, L.L.C. - 134,858,026 Grosvenor Holdings II, L.L.C. - 3,226,977 GCM Grosvenor Management, LLC - 4,480,828 GCM Progress LLC - 90,155,396 GCM Progress Subsidiary LLC - 90,155,396
	(iii) Sole power to dispose or to direct the disposition of: Michael Jay Sacks - 0 Grosvenor Holdings, L.L.C. - 0 Grosvenor Holdings II, L.L.C. - 0 GCM Grosvenor Management, LLC - 0 GCM Progress LLC - 0 GCM Progress Subsidiary LLC - 0
	(iv) Shared power to dispose or to direct the disposition of: Michael Jay Sacks - 142,565,831 Grosvenor Holdings, L.L.C. - 134,858,026 Grosvenor Holdings II, L.L.C. - 3,226,977 GCM Grosvenor Management, LLC - 4,480,828 GCM Progress LLC - 90,155,396 GCM Progress Subsidiary LLC - 90,155,396
Item 5.	Ownership of 5 Percent or Less of a Class.
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.	Certifications:
	Not Applicable

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Michael Jay Sacks

Signature:	/s/ Michael Jay Sacks
Name/Title:	Michael Jay Sacks
Date:	08/08/2025

Grosvenor Holdings, L.L.C.

Signature:	/s/ Michael Jay Sacks
Name/Title:	Michael Jay Sacks Managing Member
Date:	08/08/2025

Grosvenor Holdings II, L.L.C.

Signature:	/s/ Michael Jay Sacks
Name/Title:	Michael Jay Sacks Managing Member
Date:	08/08/2025

GCM Grosvenor Management, LLC

Signature:	/s/ Michael Jay Sacks
Name/Title:	Michael Jay Sacks Managing Member
Date:	08/08/2025

GCM Progress LLC

Signature:	/s/ Michael Jay Sacks
Name/Title:	Michael Jay Sacks Managing Member
Date:	08/08/2025

GCM Progress Subsidiary LLC

Signature:	/s/ Michael Jay Sacks
Name/Title:	Michael Jay Sacks Managing Member
Date:	08/08/2025

Comments accompanying signature: 99 Joint Filing Agreement (previously filed).

FAQ

How many Class A shares does Michael Jay Sacks beneficially own according to the filing for GCMG?

The filing reports that Michael Jay Sacks beneficially owns 142,565,831 Class A shares of GCM Grosvenor, representing 72.8% of the class.

Which affiliated entity holds the largest reported stake in the Schedule 13G/A for GCMG?

Grosvenor Holdings, L.L.C. is reported with 134,858,026 shares, equal to 71.7% of the Class A stock.

Does any reporting person claim sole voting or dispositive power in this filing for GCMG?

No. Each reporting person lists 0 shares with sole voting power and 0 shares with sole dispositive power; holdings are reported as shared voting and dispositive power.

What percentage of Class A shares does GCM Progress LLC and its subsidiary report owning?

Both GCM Progress LLC and GCM Progress Subsidiary LLC are reported with 90,155,396 shares, each representing 62.9% of the Class A shares.

Are the reporting persons and their addresses identified in the Schedule 13G/A for GCMG?

Yes. The filing names the reporting persons and gives the principal business address as c/o GCM Grosvenor Inc., 900 North Michigan Avenue, Suite 1100, Chicago, IL 60611.