Sumitomo Mitsui Group (NYSE: GCMG) reports 6.2% ownership of GCM Grosvenor

Rhea-AI Filing Summary

GCM Grosvenor Inc. Schedule 13G/A reports that Sumitomo Mitsui Trust Group, Inc. (and its subsidiary SUMITOMO MITSUI TRUST BANK Ltd.) beneficially own 3,752,965 shares of Class A common stock, representing 6.2% of the class. The filing states shared voting and dispositive power over those 3,752,965 shares. The filing is signed by Hideaki Takamiya on 04/30/2026.

Key Figures

Beneficially owned shares: 3,752,965 shares Percent of class: 6.2% Par value: $0.0001 per share +3 more

6 metrics

Beneficially owned shares 3,752,965 shares Class A common stock

Percent of class 6.2% Percent of Class A common stock

Par value $0.0001 per share Class A common stock par value

CUSIP 36831E108 Identifier for Class A common stock

Header date 03/31/2026 Date shown in document header

Signature date 04/30/2026 Signed by Hideaki Takamiya

Key Terms

beneficially owned, parent holding company, shared dispositive power, ss. 240.13d-1

4 terms

beneficially owned regulatory

"Amount beneficially owned: 3,752,965"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

parent holding company regulatory

"Sumitomo Mitsui Trust Group, Inc. is classified as a parent holding company"

shared dispositive power regulatory

"Shared Dispositive Power 3,752,965.00"

ss. 240.13d-1 regulatory

"in accordance with ss. 240.13d-1(b)(1)(ii)(G)"

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Accepted by SEC EDGAR 04/30/2026 - 06:04 AM Learn about SEC filing dates

FAQ

What stake does Sumitomo Mitsui Trust Group report in GCM Grosvenor (GCMG)?

Sumitomo Mitsui Trust Group reports beneficial ownership of 3,752,965 shares, equal to 6.2% of Class A common stock. The shares are reported as held with shared voting and dispositive power by the filer and its subsidiary.

Which entities are named on the Schedule 13G/A for GCMG?

The filing names Sumitomo Mitsui Trust Group, Inc. and SUMITOMO MITSUI TRUST BANK Ltd. as the reporting persons, both organized in Japan with shared voting and dispositive power over the reported holdings.

Does the Schedule 13G/A show sole voting or dispositive power over the shares?

No. The filing reports 0 shares with sole voting power and sole dispositive power; it reports 3,752,965 shares with shared voting and dispositive power instead.

What date is the ownership percentage tied to in the filing?

The Schedule identifies the CUSIP and includes an apparent record date of 03/31/2026 on the header and is signed on 04/30/2026, with the ownership percentage reported as 6.2%.

Is the reported holding owned directly by the parent or a subsidiary?

The filing states the securities "are owned, or may be deemed to be beneficially owned" by the subsidiary SUMITOMO MITSUI TRUST BANK Ltd. and that the parent is filing as a parent holding company.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

GCM Grosvenor Inc.

(Name of Issuer)

Class A common stock, $0.0001 par value per share

(Title of Class of Securities)

36831E108

(CUSIP Number)

03/31/2026

(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)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 36831E108

1

Names of Reporting Persons

Sumitomo Mitsui Trust Group, Inc.

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

JAPAN

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 3,752,965.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 3,752,965.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,752,965.00

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)

6.2 %

12

Type of Reporting Person (See Instructions)

HC, FI

SCHEDULE 13G

CUSIP Number(s): 36831E108

1

Names of Reporting Persons

SUMITOMO MITSUI TRUST BANK Ltd

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

JAPAN

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 3,752,965.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 3,752,965.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,752,965.00

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)

6.2 %

12

Type of Reporting Person (See Instructions)

BK

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: Sumitomo Mitsui Trust Group, Inc. SUMITOMO MITSUI TRUST BANK Ltd.
(b)	Address or principal business office or, if none, residence: Sumitomo Mitsui Trust Group, Inc.:1-4-1 Marunouchi, Chiyoda-ku, Tokyo 100-8233, Japan SUMITOMO MITSUI TRUST BANK Ltd.: 1-4-1 Marunouchi, Chiyoda-ku, Tokyo, 100-8233, Japan
(c)	Citizenship: Sumitomo Mitsui Trust Group, Inc.: Japan SUMITOMO MITSUI TRUST BANK Ltd.: Japan
(d)	Title of class of securities: Class A common stock, $0.0001 par value per share
(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).
	Parent Holding Company
Item 4.	Ownership
(a)	Amount beneficially owned: 3,752,965
(b)	Percent of class: 6.2 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0
	(ii) Shared power to vote or to direct the vote: 3,752,965
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 3,752,965
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. The securities being reported on by Sumitomo Mitsui Trust Group, Inc., as a parent holding company are owned, or may be deemed to be beneficially owned by its subsidiary, SUMITOMO MITSUI TRUST BANK Ltd. Sumitomo Mitsui Trust Group, Inc. is classified as a parent holding company or control person in accordance with ss. 240.13d-1(b)(1)(ii)(G) , as a non-U.S. institution in accordance with ss. 240.13d-1(b)(1)(ii)(J) and as Group, in accordance with ss. 240.13d-1(b)(1)(ii)(K). SUMITOMO MITSUI TRUST BANK Ltd. is classified as a parent holding company or control person in accordance with ss.240.13d-1(b)(1)(ii)(G) ,as Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c) and as a non-U.S. institution in accordance with ss.240.13d-1(b)(1)(ii)(J).
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. The securities being reported on by Sumitomo Mitsui Trust Group, Inc., as a parent holding company are owned, or may be deemed to be beneficially owned by its subsidiary, SUMITOMO MITSUI TRUST BANK Ltd. Sumitomo Mitsui Trust Group, Inc. is classified as a parent holding company or control person in accordance with ss. 240.13d-1(b)(1)(ii)(G) , as a non-U.S. institution in accordance with ss. 240.13d-1(b)(1)(ii)(J) and as Group, in accordance with ss. 240.13d-1(b)(1)(ii)(K). SUMITOMO MITSUI TRUST BANK Ltd. is classified as a parent holding company or control person in accordance with ss.240.13d-1(b)(1)(ii)(G) ,as Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c) and as a non-U.S. institution in accordance with ss.240.13d-1(b)(1)(ii)(J).
Item 8.	Identification and Classification of Members of the Group.
	If a group has filed this schedule pursuant to §240.13d-1(b)(1)(ii)(J), so indicate under Item 3(j) and attach an exhibit stating the identity and Item 3 classification of each member of the group. If a group has filed this schedule pursuant to §240.13d-1(c) or §240.13d-1(d), attach an exhibit stating the identity of each member of the group. The securities being reported on by Sumitomo Mitsui Trust Group, Inc., as a parent holding company are owned, or may be deemed to be beneficially owned by its subsidiary, SUMITOMO MITSUI TRUST BANK Ltd. Sumitomo Mitsui Trust Group, Inc. is classified as a parent holding company or control person in accordance with ss. 240.13d-1(b)(1)(ii)(G) , as a non-U.S. institution in accordance with ss. 240.13d-1(b)(1)(ii)(J) and as Group, in accordance with ss. 240.13d-1(b)(1)(ii)(K). SUMITOMO MITSUI TRUST BANK Ltd. is classified as a parent holding company or control person in accordance with ss.240.13d-1(b)(1)(ii)(G) ,as Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c) and as a non-U.S. institution in accordance with ss.240.13d-1(b)(1)(ii)(J).
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

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.

Sumitomo Mitsui Trust Group, Inc.

Signature:	/s/ Hideaki Takamiya
Name/Title:	Senior Manager of Risk Management Dept
Date:	04/30/2026

SUMITOMO MITSUI TRUST BANK Ltd

Signature:	/s/ Hideaki Takamiya
Name/Title:	Senior Manager of Risk Management Dept
Date:	04/30/2026