GCM Grosvenor Inc. (GCMG) ownership disclosure: Columbia Acorn Fund reports beneficial ownership of 4,428,750 shares of Class A common stock (representing 7.3%). Related managers report larger indirect positions: Columbia Management Investment Advisers, LLC (shared power over 5,276,828 shares, 8.7%) and Ameriprise Financial, Inc. (shared power over 5,294,501 shares, 8.7%). The filing states these shared holdings arise because CMIA advises the Fund and AFI is the parent of CMIA; each disclaims direct beneficial ownership. The cover information is reported as of March 31, 2026.
Positive
None.
Negative
None.
Insights
Large institutional positions disclosed via shared dispositive power, March 31, 2026.
The filing lists AFI and CMIA as reporting persons with shared voting and dispositive power over 5,294,501 and 5,276,828 shares respectively, and the Fund directly holding 4,428,750 shares. These figures are presented on the cover page and incorporated into Item 4.
Ownership arises from advisory relationships and parent-subsidiary structure; the filing explicitly disclaims direct beneficial ownership by AFI and CMIA. Subsequent filings or proxy statements may show whether these positions change or influence governance.
Key Figures
Columbia Acorn Fund holdings:4,428,750 sharesColumbia Acorn Fund percent:7.3%CMIA shared power:5,276,828 shares+1 more
4 metrics
Columbia Acorn Fund holdings4,428,750 sharesClass A common stock, <date>03/31/2026</date>
Columbia Acorn Fund percent7.3%Percent of Class A common stock, <date>03/31/2026</date>
"Amount beneficially owned: Incorporated by reference to Items (5)-(9)"
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.
shared dispositive powerregulatory
"Shared Dispositive Power 5,294,501.00"
Schedule 13G/Aregulatory
"(Amendment No. 8 ) GCM Grosvenor Inc."
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.
Who beneficially owns GCM Grosvenor (GCMG) shares according to this Schedule 13G/A?
The filing shows the Columbia Acorn Fund directly holds 4,428,750 shares (7.3%). Related entities with shared power include Columbia Management Investment Advisers, LLC and Ameriprise Financial, Inc., each reporting beneficial influence over larger share counts.
What stake does Ameriprise Financial report in GCM Grosvenor (GCMG)?
Ameriprise Financial reports shared voting and dispositive power over 5,294,501 shares, representing 8.7% of Class A common stock, with the position described as arising through its subsidiary advisory structure as of March 31, 2026.
Does Columbia Management Investment Advisers (CMIA) claim direct ownership of GCMG shares?
No. CMIA states it does not directly own the shares but reports shared power over 5,276,828 shares (8.7%) because it advises the Fund and other managed accounts holding those shares as of March 31, 2026.
Are any other parties shown as owning more than 5% of GCMG?
The filing states that, as of March 31, 2026, only the Columbia Acorn Fund owned more than 5% directly. Other funds or accounts managed by CMIA do not exceed 5% individually according to the reporting persons' knowledge.
What does the filing say about voting and dispositive power for these holdings?
The cover rows show shared voting power and shared dispositive power for AFI and CMIA over the reported share totals (e.g., AFI: 5,294,501 shared votes), and CMIA incorporates the Fund's holdings into its reported totals.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. 8)
GCM Grosvenor Inc.
(Name of Issuer)
Class A Common Stock
(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
Ameriprise Financial, 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
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
5,294,501.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
5,294,501.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
5,294,501.00
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)
8.7 %
12
Type of Reporting Person (See Instructions)
HC
SCHEDULE 13G
CUSIP Number(s):
36831E108
1
Names of Reporting Persons
Columbia Management Investment Advisers, 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
MINNESOTA
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
5,276,828.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
5,276,828.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
5,276,828.00
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)
8.7 %
12
Type of Reporting Person (See Instructions)
IA
SCHEDULE 13G
CUSIP Number(s):
36831E108
1
Names of Reporting Persons
Columbia Acorn Fund
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
MASSACHUSETTS
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
4,428,750.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
4,428,750.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
4,428,750.00
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)
7.3 %
12
Type of Reporting Person (See Instructions)
IV
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:
(a) Ameriprise Financial, Inc. ("AFI")
(b) Columbia Management Investment Advisers, LLC ("CMIA")
(c) Columbia Acorn Fund ("Fund")
(b)
Address or principal business office or, if none, residence:
(a) 145 Ameriprise Financial Center, Minneapolis, MN 55474
(b) 290 Congress Street, Boston, MA 02210
(c) 290 Congress Street, Boston, MA 02210
(c)
Citizenship:
(a) Delaware
(b) Minnesota
(c) Massachusetts
(d)
Title of class of securities:
Class A Common Stock
(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:
Incorporated by reference to Items (5)-(9) and (11) of the cover page pertaining to each reporting person.
CMIA and AFI do not directly own any shares of Common Stock of the issuer. As the investment adviser to the Fund and various other unregistered and registered investment companies and other managed accounts, CMIA may be deemed to beneficially own the shares reported herein by the Fund. Accordingly, the shares reported herein by CMIA include those shares separately reported herein by the Fund.
As the parent holding company of CMIA, AFI may be deemed to beneficially own the shares reported herein by CMIA. Accordingly, the shares reported herein by AFI include those shares separately reported herein by CMIA.
Each of AFI and CMIA, and the subsidiaries identified on the attached Exhibit I, disclaims beneficial ownership of any shares reported on this Schedule.
(b)
Percent of class:
The information required by Item 4(b) is set forth in Rows (5)-(9) and (11) of the cover page for each Reporting Person hereto and is incorporated herein by reference for each Reporting Person.
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
The information required by Item 4(c) is set forth in Rows (5)-(9) and (11) of the cover page for each Reporting Person hereto and is incorporated herein by reference for each Reporting Person.
(ii) Shared power to vote or to direct the vote:
The information required by Item 4(c) is set forth in Rows (5)-(9) and (11) of the cover page for each Reporting Person hereto and is incorporated herein by reference for each Reporting Person.
(iii) Sole power to dispose or to direct the disposition of:
The information required by Item 4(c) is set forth in Rows (5)-(9) and (11) of the cover page for each Reporting Person hereto and is incorporated herein by reference for each Reporting Person.
(iv) Shared power to dispose or to direct the disposition of:
The information required by Item 4(c) is set forth in Rows (5)-(9) and (11) of the cover page for each Reporting Person hereto and is incorporated herein by reference for each Reporting Person.
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.
To the knowledge of AFI, CMIA and the Fund, no other persons besides AFI, CMIA and the Fund and those persons for whose shares of common stock CMIA and AFI report beneficial ownership have the right to receive or the power to direct the receipt of dividends from or the proceeds from the sale of the securities of the issuer reported herein. As of March 31, 2026, only the Fund owned more than 5% of the class of securities reported herein.
Any remaining shares reported herein by CMIA are held by various other funds or accounts managed by CMIA which each have the right to receive any dividends paid by the issuer and could terminate their respective investment advisory relationship with CMIA and then subsequently direct the use of proceeds from the sale of the common stock owned by such fund or account. To CMIA's knowledge, none of these other funds or accounts own more than 5% of the outstanding shares of the issuer as of March 31, 2026.
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.
AFI: See Exhibit I
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.
Ameriprise Financial, Inc.
Signature:
/s/ Michael G. Clarke
Name/Title:
Michael G. Clarke, Senior Vice President, North America Head of Operations & Investor Services
Date:
05/15/2026
Columbia Management Investment Advisers, LLC
Signature:
/s/ Michael G. Clarke
Name/Title:
Michael G. Clarke, Senior Vice President, North America Head of Operations & Investor Services
Date:
05/15/2026
Columbia Acorn Fund
Signature:
/s/ Michael G. Clarke
Name/Title:
Michael G. Clarke, Senior Vice President & Chief Financial Officer
Date:
05/15/2026
Comments accompanying signature:
Contact Information
Charles Chiesa
VP Fund Treasurer Global Operations and Investor Services
Telephone: 617-385-9593
Exhibit Information
Exhibit Index
Exhibit I Identification and Classification of the Subsidiary which Acquired the Security Being Reported on by the Parent Holding Company.
Exhibit II Joint Filing Agreement
