Ariel Investments reports 7.2% stake in GCM Grosvenor

GCM Grosvenor Inc: Ariel Investments reports 4,396,403 shares beneficially owned.

Rhea-AI Filing Summary

GCM Grosvenor Inc: Ariel Investments reports 4,396,403 shares beneficially owned. Ariel Investments, LLC states it beneficially owns 4,396,403 shares of Common Stock, representing 7.2% of the class, with 3,616,664 shares of sole voting power and sole dispositive power over the full position. The filing is an amendment (No. 4) to the Schedule 13G/A.

Insights

Institutional Ownership Analyst

Large passive stake disclosed by an investment adviser.

Ariel Investments, LLC reports beneficial ownership of 4,396,403 shares, equal to 7.2% of GCM Grosvenor Inc common stock. The filing attributes sole voting power over 3,616,664 shares, indicating concentrated voting control within the reported stake.

Timing and trading intent are not stated; subsequent filings would show changes. Cash‑flow treatment and any client‑level ownership above 5% are addressed in the filing text.

Compliance & Governance Specialist

Amendment clarifies adviser reporting and client interest disclaimers.

The Schedule 13G/A notes that Ariel's adviser clients have rights to dividends or proceeds and that no single client holds an economic interest over 5% of the class. This language aligns with standard adviser reporting and beneficial‑owner attribution rules.

Investor implications depend on future Schedule 13 filings if voting or ownership changes occur.

Key Figures

Beneficial ownership: 4,396,403 shares Percent of class: 7.2% Sole voting power: 3,616,664 shares +2 more

5 metrics

Beneficial ownership 4,396,403 shares Amount beneficially owned

Percent of class 7.2% Percent of common stock class

Sole voting power 3,616,664 shares Sole power to vote or direct the vote

Sole dispositive power 4,396,403 shares Sole power to dispose or direct disposition

CUSIP 36831E108 Security identifier for Common Stock

Key Terms

Schedule 13G/A, Beneficially owned, Sole dispositive power, CUSIP

4 terms

Schedule 13G/A regulatory

"Amendment No. 4) ... Schedule 13G/A"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

Beneficially owned regulatory

"Amount beneficially owned: 4,396,403"

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.

Sole dispositive power regulatory

"Sole power to dispose or to direct the disposition of: 4,396,403"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

CUSIP financial

"CUSIP No.: 36831E108"

A CUSIP is a nine-character alphanumeric code that uniquely identifies a U.S. or Canadian financial security—such as a stock, bond, or fund share—like a Social Security number for an investment. It matters to investors because brokers, exchanges and record-keepers use the CUSIP to match trades, track ownership, settle transactions and pull accurate records, reducing errors and ensuring money and securities go to the right place.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What stake does Ariel Investments report in GCM Grosvenor (GCMG)?

Ariel Investments, LLC reports beneficial ownership of 4,396,403 shares, equal to 7.2% of the common stock. The filing states Ariel holds sole dispositive power over the full position and sole voting power over 3,616,664 shares.

Does Ariel Investments control voting for the shares of GCM Grosvenor?

Yes. Ariel reports sole power to vote or direct the vote for 3,616,664 shares. The filing lists no shared voting power and sole dispositive power for the full 4,396,403‑share position.

Is the Ariel stake held for a single client above 5% of GCMG?

The filing states Ariel’s adviser clients have rights to dividends or proceeds, and that none of its clients have an economic interest in more than 5% of the reported securities. Client‑level holdings are thus reported as below 5%.

What form and amendment number reports Ariel’s ownership in GCM Grosvenor?

The ownership is reported on a Schedule 13G/A, identified in the excerpt as Amendment No. 4, and was signed on 05/14/2026 by a company signatory listed in the filing.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/14/2026 - 05:27 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 4)

GCM Grosvenor Inc

(Name of Issuer)

Common Stock SH

(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

Ariel Investments, 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 3,616,664.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 4,396,403.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,396,403.00

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)

7.2 %

12

Type of Reporting Person (See Instructions)

IA

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: Ariel Investments, LLC
(b)	Address or principal business office or, if none, residence: 200 E. Randolph Street, Suite 2900, Chicago, 60601, United States
(c)	Citizenship: DELAWARE
(d)	Title of class of securities: Common Stock SH
(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: 4,396,403
(b)	Percent of class: 7.2 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 3,616,664
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 4,396,403
	(iv) Shared power to dispose or to direct the disposition of: 0
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. Ariel Investments, LLC's adviser clients have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, all securities reported upon this Schedule. None of Ariel Investments, LLC's clients have an economic interest in more than 5% of the subject securities reported upon this Schedule.
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:

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.

Ariel Investments, LLC

Signature:	James Prescott
Name/Title:	Vice President, Compliance
Date:	05/14/2026