SEC Form 4
AllianceBernstein Holding, L.P. (AB) insider trading
In the 12 months to Oct 23, 2026, 2 AB insiders reported open-market sales of $2.4M across 3 filings; no open-market purchases were filed.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $2.4M
- 3 filings · 2 insiders
- Open-market purchases
- $0
- 0 filings
- Pre-arranged sales (10b5-1)
- 1 of 3
- $1.1M of $2.4M sold (45%)
Who traded AB, and when
- Sale
- Sale, pre-arranged (10b5-1)
AB daily close from Oct 23, 2025 to Oct 23, 2026, between $34.19 and $42.80, last $34.93. 3 sale and 0 purchase filings by 2 insiders, marked at their filing dates. Seth P. Bernstein, CEO: sold $2.2M across 2 filings, first filed Feb 19, 2026, last May 4, 2026. Charles G.T. Stonehill, Director: sold $185.9K across 1 filing, first filed Aug 6, 2026, last Aug 6, 2026.
Largest mark · tap a row for others
Seth P. Bernstein · CEO
Sale $1,146,631
29,000 shares at $39.54 avg
Filed May 4, 2026 · traded Apr 30
Close on filing date $39.42
Seth P. Bernstein · CEO
CEO
$2.2M soldCharles G.T. Stonehill · Director
Director
$185.9K soldHas AllianceBernstein Holding, L.P.'s CEO sold stock?
Yes. Seth P. Bernstein (CEO) sold 55,840 shares ($2.2M) between Feb 2026 and May 2026, $1.1M of it under a pre-arranged 10b5-1 plan.
Open-market trades
3 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Seth P. Bernstein | CEO | $2.2M | — | 2 | 49% of sales | |
| Charles G.T. Stonehill | Director | $185.9K | — | 1 | — |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Charles G.T. Stonehill Director | Sale | 5,000 | $37.17 | $185.9K | 24,573 | |
traded | Seth P. Bernstein CEO | Sale | 29,000 | $39.54 | $1.1M | 212,046 | |
traded | Seth P. Bernstein CEO | SalePre-arranged (10b5-1) | 26,840 | $41.08 | $1.1M | 241,046 |
GET /stocks/filings/vX/form-4?tickers=AB&filing_date.gte=2025-10-23&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"AB"
],
"issuer_cik": "0000825313",
"owner_cik": "0001739527",
"accession_number": "0001739527-26-000005",
"form_type": "4",
"filing_date": "2026-08-06",
"period_of_report": "2026-08-04",
"issuer_name": "ALLIANCEBERNSTEIN HOLDING L.P.",
"issuer_trading_symbol": "AB",
"owner_name": "Stonehill Charles G.T.",
"is_director": true,
"is_officer": false,
"is_ten_percent_owner": false,
"is_other": false,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "AB Holding Units",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-08-04",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 5000,
"transaction_price_per_share": 37.17,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 24573,
"transaction_value": 185850,
"not_subject_to_section_16": false,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "Units representing assignments of beneficial ownership of limited partnership interests in AllianceBernstein Holding L.P. (\"AB Holding Units\")."
},
{
"id": "F2",
"description": "Reporting Person sold 5,000 AB Holding Units at an average price of approximately $37.17 per unit."
}
]
},
{
"tickers": [
"AB"
],
"issuer_cik": "0000825313",
"owner_cik": "0001705584",
"accession_number": "0001705584-26-000005",
"form_type": "4",
"filing_date": "2026-05-04",
"period_of_report": "2026-04-30",
"issuer_name": "ALLIANCEBERNSTEIN HOLDING L.P.",
"issuer_trading_symbol": "AB",
"owner_name": "BERNSTEIN SETH P",
"is_director": true,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "CEO",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "AB Holding Units",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-04-30",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 29000,
"transaction_price_per_share": 39.539,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 212046,
"transaction_value": 1146631,
"not_subject_to_section_16": false,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "Units representing assignments of beneficial ownership of limited partnership interests in AllianceBernstein Holding L.P. (\"AB Holding Units\")."
},
{
"id": "F2",
"description": "Reporting Person sold 29,000 AB Holding Units at a weighted average price of $39.539."
}
]
}
]
}
// 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) · 23 records
- Tax withholding10 records
- Grants and awards12 records
- Gifts1 record
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
Build this yourself
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 AB 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.
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.