As of November 6, 2026, 6 holders' latest Schedule 13D or 13G filings report owning 5% or more of GCM Grosvenor Inc. The largest reported stake is Michael Jay Sacks', at 69.9%. 20 filings are on record since July 16, 2025 (Schedule 13G/A, August 13, 2026).
Sell to companies like GCM Grosvenor Inc? Enter your website and see 10 with a filed reason to buy from you this month. Free.
Opens in a new tab. No signup.
Key facts
- · Reporting person: Michael Jay Sacks · Sole voting: 0 · Shared voting: 141,672,819 · Sole dispositive: 0 · Shared dispositive: 141,672,819 · SCHEDULE 13G/A, 2026-08-13
- · Reporting person: Vanguard Capital Management · Sole voting: 392,351 · Shared voting: 0 · Sole dispositive: 2,982,847 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-07-31
- · Holder: Ameriprise Financial, Inc. · Percent: 8.7% · SCHEDULE 13G/A
- · Holder: Ariel Investments, LLC · Percent: 7.2% · SCHEDULE 13G/A
- · Holder: Sumitomo Mitsui Trust Group, Inc. · Percent: 6.2% · SCHEDULE 13G/A
GCM Grosvenor Inc. has 20 Schedule 13D or 13G filings on record since 2025-07-16. 6 holders' latest filing reports 5% or more of class a common stock, par value $0.0001. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| 69.9% | 141,672,819 | SCHEDULE 13G/A, 2026-08-13 | 2026-06-30 | |
| Cantor Fitzgerald, L.P. | 10.3% | 6,451,535 | SCHEDULE 13G/A, 2026-02-17 | 2025-12-31 |
| Ameriprise Financial, Inc. | 8.7% | 5,294,501 | SCHEDULE 13G/A, 2026-05-15 | 2026-03-31 |
| Ariel Investments, LLC | 7.2% | 4,396,403 | SCHEDULE 13G/A, 2026-05-14 | 2026-03-31 |
| Sumitomo Mitsui Trust Group, Inc. | 6.2% | 3,752,965 | SCHEDULE 13G/A, 2026-04-30 | 2026-03-31 |
| BlackRock, Inc. | 6.1% | 3,066,360 | SCHEDULE 13G/A, 2025-07-17 | 2025-06-30 |
| Vanguard Capital Management | 4.93% | 2,982,847 | SCHEDULE 13G/A, 2026-07-31 | 2026-06-30 |
| Royce & Associates LP | 4.39% | 2,194,359 | SCHEDULE 13G/A, 2025-07-16 | 2025-06-30 |
| Massachusetts Financial Services Company | 4% | 2,008,511 | SCHEDULE 13G/A, 2025-08-04 | 2025-06-30 |
| Wasatch Advisors LP | 0% | 0 | SCHEDULE 13G/A, 2025-08-13 | 2025-06-30 |
| LMR Partners LLP | 0% | 0 | SCHEDULE 13G/A, 2026-02-17 | 2025-12-31 |
| The Vanguard Group | 0% | 0 | SCHEDULE 13G/A, 2026-03-26 | 2026-03-13 |
Holding shares or following this stake? See who's behind GCM Grosvenor Inc. and the warning signs.
Free to see. No signup.
Keep reading
More on GCM Grosvenor Inc. and the records around it.
GCM Grosvenor Inc. elsewhere on the record
Companies that share a holder
- Sumitomo Mitsui Trust Group, Inc. also filed stake reports on 7 other companies: Arcturus Therapeutics Holdings Inc. (Oct 2026), Ibotta, Inc. (Feb 2026), 10x Genomics, Inc. (Oct 2025)
- Ariel Investments, LLC also filed stake reports on 13 other companies: Lindblad Expeditions Holdings (Aug 2026), Madison Square Garden Entertai (Aug 2026), Mattel Inc (Aug 2026)
- Massachusetts Financial Services Company also filed stake reports on 26 other companies: ASHLAND INC. (Aug 2026), BLACKSTONE DIGITAL INFRASTRUCTURE TRUST INC (Aug 2026), PG&E CORP (Aug 2026)
Watch GCM Grosvenor Inc.
Get an email when GCM Grosvenor Inc. files again: a new raise, a leadership change, a layoff or an IPO filing. One email first to confirm; nothing else until you click it. At most one a day, one click to stop. Free for up to 3 companies.
Want the whole picture on GCM Grosvenor Inc.?
Example from a real report (our sample on Target): “In March 2026, Target announced a planned incremental $1 billion operating investment” Source: Target Corporation (press release)
A Full Report on GCM Grosvenor Inc.: verified, sourced, every claim cited, ready in a few minutes. See pricing.
What the Full Report on GCM Grosvenor Inc. covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
Sources
20 cited sources found
Plus the sections for what you are deciding, which you pick after ordering.
A real finished report, first screen. Opens in a new tab.
Not ready to order yet? Keep this snapshot.
Sends this preview to you once; we won't add you to any list
Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Michael Jay Sacks | 0 | 141,672,819 | 0 | 141,672,819 | SCHEDULE 13G/A, 2026-08-13 |
| Grosvenor Holdings, L.L.C. | 0 | 133,965,014 | 0 | 133,965,014 | SCHEDULE 13G/A, 2026-08-13 |
| Grosvenor Holdings II, L.L.C. | 0 | 3,226,977 | 0 | 3,226,977 | SCHEDULE 13G/A, 2026-08-13 |
| GCM Grosvenor Management, LLC | 0 | 4,480,828 | 0 | 4,480,828 | SCHEDULE 13G/A, 2026-08-13 |
| GCM Progress LLC | 0 | 88,993,499 | 0 | 88,993,499 | SCHEDULE 13G/A, 2026-08-13 |
| GCM Progress Subsidiary LLC | 0 | 88,993,499 | 0 | 88,993,499 | SCHEDULE 13G/A, 2026-08-13 |
| Vanguard Capital Management | 392,351 | 0 | 2,982,847 | 0 | SCHEDULE 13G/A, 2026-07-31 |
The latest filing identifies GCM Grosvenor Inc. by CUSIP 36831E108 and gives its principal executive office as 900 North Michigan Avenue, Suite 1100, Chicago, IL 60611 (SCHEDULE 13G/A, 2026-08-13).
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-16 | Royce & Associates LP | 4.39% | SCHEDULE 13G/A |
| 2025-07-17 | BlackRock, Inc. | 6.1% | SCHEDULE 13G/A |
| 2025-07-31 | Sumitomo Mitsui Trust Group, Inc. | 7.5% | SCHEDULE 13G |
| 2025-08-04 | Massachusetts Financial Services Company | 4% | SCHEDULE 13G/A |
| 2025-08-08 | Michael Jay Sacks | 72.8% | SCHEDULE 13G/A |
| 2025-08-13 | Wasatch Advisors LP | 0% | SCHEDULE 13G/A |
| 2025-08-13 | Ariel Investments, LLC | 8.9% | SCHEDULE 13G/A |
| 2025-10-06 | Cantor Fitzgerald, L.P. | 15% | SCHEDULE 13G/A |
| 2025-11-14 | LMR Partners LLP | 6.9% | SCHEDULE 13G/A |
| 2025-11-14 | Ameriprise Financial, Inc. | 10.2% | SCHEDULE 13G/A |
| 2026-02-13 | Michael Jay Sacks | 70% | SCHEDULE 13G/A |
| 2026-02-17 | LMR Partners LLP | 0% | SCHEDULE 13G/A |
| 2026-02-17 | Cantor Fitzgerald, L.P. | 10.3% | SCHEDULE 13G/A |
| 2026-03-26 | The Vanguard Group | 0% | SCHEDULE 13G/A |
| 2026-04-29 | Vanguard Capital Management | 5.02% | SCHEDULE 13G |
| 2026-04-30 | Sumitomo Mitsui Trust Group, Inc. | 6.2% | SCHEDULE 13G/A |
| 2026-05-14 | Ariel Investments, LLC | 7.2% | SCHEDULE 13G/A |
| 2026-05-15 | Ameriprise Financial, Inc. | 8.7% | SCHEDULE 13G/A |
| 2026-07-31 | Vanguard Capital Management | 4.93% | SCHEDULE 13G/A |
| 2026-08-13 | Michael Jay Sacks | 69.9% | SCHEDULE 13G/A |
Questions about who owns GCM Grosvenor Inc.
Who owns GCM Grosvenor Inc.?
On this page, 6 holders' latest ownership filings report 5% or more of GCM Grosvenor Inc.: Michael Jay Sacks (69.9%, Schedule 13G/A, filed 2026-08-13), Cantor Fitzgerald, L.P. (10.3%, Schedule 13G/A, filed 2026-02-17), Ameriprise Financial, Inc. (8.7%, Schedule 13G/A, filed 2026-05-15), Ariel Investments, LLC (7.2%, Schedule 13G/A, filed 2026-05-14) and Sumitomo Mitsui Trust Group, Inc. (6.2%, Schedule 13G/A, filed 2026-04-30); 1 more is listed above.
Who are the largest shareholders of GCM Grosvenor Inc.?
By the share each holder's latest filing reports, the largest holders of GCM Grosvenor Inc. on this page are Michael Jay Sacks (69.9%), Cantor Fitzgerald, L.P. (10.3%) and Ameriprise Financial, Inc. (8.7%).
When did Michael Jay Sacks buy into GCM Grosvenor Inc.?
The filings give report dates, not purchase dates. The earliest filing from Michael Jay Sacks on this page is the Schedule 13G/A, filed 2025-08-08, reporting 72.8%; its latest, Schedule 13G/A filed 2026-08-13, reports 69.9%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 20 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
Tools for this story
Each opens in a new tab, filled in for GCM Grosvenor Inc.. With no account yet, you sign up free and land on the result.
Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.