SEC Form 4
GCM Grosvenor Inc. (GCMG) insider trading
In the 12 months to Oct 26, 2026, 5 GCMG insiders reported open-market sales of $10.2M across 6 filings; no open-market purchases were filed.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $10.2M
- 6 filings · 5 insiders
- Open-market purchases
- $0
- 0 filings
- Pre-arranged sales (10b5-1)
- 2 of 6
- $1.6M of $10.2M sold (15%)
Who traded GCMG, and when
- Sale
- Sale, pre-arranged (10b5-1)
GCMG daily close from Oct 27, 2025 to Oct 26, 2026, between $9.45 and $14.05, last $12.30. 6 sale and 0 purchase filings by 5 insiders, marked at their filing dates. Brandon Lutnick, 10% owner: sold $7.5M across 1 filing, first filed Jul 17, 2026, last Jul 17, 2026. Pamela L. Bentley, Chief Financial Officer: sold $1.6M across 2 filings, first filed Dec 18, 2025, last Sep 16, 2026. Kathleen Patricia Sullivan, Principal Accounting Officer: sold $526.3K across 1 filing, first filed Sep 3, 2026, last Sep 3, 2026. Angela Blanton, Director: sold $488.8K across 1 filing, first filed Feb 27, 2026, last Feb 27, 2026. L. P. Cantor Fitzgerald, 10% owner: sold $57.0K across 1 filing, first filed Jul 17, 2026, last Jul 17, 2026.
Largest mark · tap a row for others
Brandon Lutnick · 10% owner
Sale $7,538,553
553,106 shares at $13.63 avg
Filed Jul 17, 2026 · traded Jul 15
Close on filing date $12.90
Brandon Lutnick · 10% owner
10% owner
$7.5M soldPamela L. Bentley · Chief Financial Officer
Chief Financial Officer
$1.6M soldKathleen Patricia Sullivan · Principal Accounting Officer
Principal Accounting Officer
$526.3K soldAngela Blanton · Director
Director
$488.8K soldL. P. Cantor Fitzgerald · 10% owner
10% owner
$57.0K soldOpen-market trades
6 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Brandon Lutnick | 10% owner | $7.5M | — | 1 | — | |
| Pamela L. Bentley | Chief Financial Officer | $1.6M | — | 2 | 100% of sales | |
| Kathleen Patricia Sullivan | Principal Accounting Officer | $526.3K | — | 1 | — | |
| Angela Blanton | Director | $488.8K | — | 1 | — | |
| L. P. Cantor Fitzgerald | 10% owner | $57.0K | — | 1 | — |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Pamela L. Bentley Chief Financial Officer | SalePre-arranged (10b5-1) | 50,000 | $12.59 | $629.3K | 14,397 | |
traded | Kathleen Patricia Sullivan Principal Accounting Officer | Sale | 40,000 | $13.16 | $526.3K | 44,795 | |
traded | L. P. Cantor Fitzgerald 10% owner | Sale | 4,000 | $14.24 | $57.0K | 6,320,979 | |
traded | Brandon Lutnick 10% owner | Sale | 553,106 | $13.63 | $7.5M | 5,894,429 | |
traded | Angela Blanton Director | Sale | 41,184 | $11.87 | $488.8K | 45,699 | |
traded | Pamela L. Bentley Chief Financial Officer | SalePre-arranged (10b5-1) | 80,000 | $11.62 | $929.4K | 3,309 |
GET /stocks/filings/vX/form-4?tickers=GCMG&filing_date.gte=2025-10-26&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"GCMG"
],
"issuer_cik": "0001819796",
"owner_cik": "0001610089",
"accession_number": "0001628280-26-062340",
"form_type": "4",
"filing_date": "2026-09-16",
"period_of_report": "2026-09-15",
"issuer_name": "GCM Grosvenor Inc.",
"issuer_trading_symbol": "GCMG",
"owner_name": "Bentley Pamela L",
"is_director": false,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "Chief Financial Officer",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Class A Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-09-15",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 40000,
"transaction_price_per_share": 12.5627,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 24397,
"transaction_value": 502508,
"not_subject_to_section_16": false,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "These shares were sold pursuant to a Rule 10b5-1 trading plan in multiple transactions at prices ranging from $12.3800 to $12.7300, inclusive. The price reported in Column 4 is a weighted average price."
}
],
"remarks": "The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1) and (2) to this Form 4."
},
{
"tickers": [
"GCMG"
],
"issuer_cik": "0001819796",
"owner_cik": "0001610089",
"accession_number": "0001628280-26-062340",
"form_type": "4",
"filing_date": "2026-09-16",
"period_of_report": "2026-09-15",
"issuer_name": "GCM Grosvenor Inc.",
"issuer_trading_symbol": "GCMG",
"owner_name": "Bentley Pamela L",
"is_director": false,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "Chief Financial Officer",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Class A Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-09-16",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 10000,
"transaction_price_per_share": 12.6787,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 14397,
"transaction_value": 126786.99999999999,
"not_subject_to_section_16": false,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F2",
"description": "These shares were sold pursuant to a Rule 10b5-1 trading plan in multiple transactions at prices ranging from $12.4550 to $12.7800, inclusive. The price reported in Column 4 is a weighted average price."
}
],
"remarks": "The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1) and (2) to this Form 4."
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 38 records
- Option exercises20 records
- Tax withholding9 records
- Grants and awards3 records
- Gifts4 records
- Other2 records
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Pre-arranged (10b5-1)
- The insider marked the filing as made under a trading plan set up in advance (SEC Rule 10b5-1). The mark covers the whole filing, and an unmarked filing may still be under a plan.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.
- Counted once
- When several owners (a fund and its partners, say) report the same trade, it's counted once. Corrected filings replace the originals.
Frequently asked questions
Has GCM Grosvenor Inc.'s CEO sold stock?
No. Michael Jay Sacks (CEO) made no open-market sales filed as CEO in the last 12 months.
How current is GCMG’s insider data?
These are GCMG Form 4 filings from the last year, refreshed daily. The Massive Form 4 API has the full, continuously updated record.
What counts as an open-market buy or sell?
Only purchases and sales at the market price. Option exercises, grants, gifts, and shares withheld for taxes are reported on Form 4 but are left out of the buy and sell totals.
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This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for GCMG every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
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