SEC Form 4
POST HOLDINGS, INC. (POST) insider trading
In the 12 months to Oct 24, 2026, 4 POST insiders reported open-market sales of $34.9M across 5 filings; one director bought $176.3K.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $34.9M
- 5 filings · 4 insiders
- Open-market purchases
- $176.3K
- 1 filing · David W. Kemper, Director
Who traded POST, and when
- Purchase
- Sale
POST daily close from Oct 24, 2025 to Oct 23, 2026, between $72.54 and $114.61, last $80.56. 5 sale and 1 purchase filings by 5 insiders, marked at their filing dates. William P. Stiritz, Other: sold $32.3M across 1 filing, first filed Sep 3, 2026, last Sep 3, 2026. Gregory L. Curl, Director: sold $1.4M across 2 filings, first filed Feb 10, 2026, last May 14, 2026. Nicolas Catoggio, PRES & CEO, PCB: sold $1.0M across 1 filing, first filed Nov 26, 2025, last Nov 26, 2025. David W. Kemper, Director: bought $176.3K across 1 filing, first filed Nov 25, 2025, last Nov 25, 2025. Bradly A. Harper, SVP, CHIEF ACCTING OFFICER: sold $160.3K across 1 filing, first filed Dec 8, 2025, last Dec 8, 2025.
Largest mark · tap a row for others
William P. Stiritz · Other
Sale $32,289,106
384,132 shares at $84.06 avg
Filed Sep 3, 2026 · traded Sep 1
Close on filing date $84.26
William P. Stiritz · Other
Other
$32.3M soldGregory L. Curl · Director
Director
$1.4M soldNicolas Catoggio · PRES & CEO, PCB
PRES & CEO, PCB
$1.0M soldDavid W. Kemper · Director
Director
$176.3K boughtBradly A. Harper · SVP, CHIEF ACCTING OFFICER
SVP, CHIEF ACCTING OFFICER
$160.3K soldHas POST HOLDINGS, INC.'s CEO sold stock?
Yes. Nicolas Catoggio (CEO) sold 10,000 shares ($1.0M) in Nov 2025. Gregory Carl Pearson and Robert V. Vitale (CEOs) made no open-market sales filed as CEO in the last 12 months.
Open-market trades
6 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| William P. Stiritz | Other | $32.3M | — | 1 | — | |
| Gregory L. Curl | Director | $1.4M | — | 2 | — | |
| Nicolas Catoggio | PRES & CEO, PCB | $1.0M | — | 1 | — | |
| David W. Kemper | Director | — | $176.3K | 1 | — | |
| Bradly A. Harper | SVP, CHIEF ACCTING OFFICER | $160.3K | — | 1 | — |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | William P. Stiritz Other | Sale | 384,132 | $84.06 | $32.3M | 0 | |
traded | Gregory L. Curl Director | Sale | 6,186 | $105.05 | $649.8K | 15,107 | |
traded | Gregory L. Curl Director | Sale | 6,983 | $114.31 | $798.2K | 21,293 | |
traded | Bradly A. Harper SVP, CHIEF ACCTING OFFICER | Sale | 1,658 | $96.69 | $160.3K | 11,441 | |
traded | Nicolas Catoggio PRES & CEO, PCB | Sale | 10,000 | $100.21 | $1.0M | 75,542 | |
traded | David W. Kemper Director | Purchase | 1,800 | $97.93 | $176.3K | 31,522 |
GET /stocks/filings/vX/form-4?tickers=POST&filing_date.gte=2025-10-24&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"POST"
],
"issuer_cik": "0001530950",
"owner_cik": "0001052058",
"accession_number": "0001052058-26-000005",
"form_type": "4",
"filing_date": "2026-09-03",
"period_of_report": "2026-09-01",
"issuer_name": "Post Holdings, Inc.",
"issuer_trading_symbol": "POST",
"owner_name": "STIRITZ WILLIAM P",
"is_director": false,
"is_officer": false,
"is_ten_percent_owner": false,
"is_other": true,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-09-02",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 277707,
"transaction_price_per_share": 84.23,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 228,
"transaction_value": 23391260.61,
"not_subject_to_section_16": false,
"direct_or_indirect": "I",
"nature_of_ownership": "By Spouse",
"footnotes": [
{
"id": "F3",
"description": "The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $83.64 to $84.635 per share."
}
]
},
{
"tickers": [
"POST"
],
"issuer_cik": "0001530950",
"owner_cik": "0001052058",
"accession_number": "0001052058-26-000005",
"form_type": "4",
"filing_date": "2026-09-03",
"period_of_report": "2026-09-01",
"issuer_name": "Post Holdings, Inc.",
"issuer_trading_symbol": "POST",
"owner_name": "STIRITZ WILLIAM P",
"is_director": false,
"is_officer": false,
"is_ten_percent_owner": false,
"is_other": true,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-09-02",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 228,
"transaction_price_per_share": 85.01,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 0,
"transaction_value": 19382.280000000002,
"not_subject_to_section_16": false,
"direct_or_indirect": "I",
"nature_of_ownership": "By Spouse"
}
]
}
// 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) · 103 records
- Option exercises17 records
- Tax withholding44 records
- Grants and awards29 records
- Gifts9 records
- Other4 records
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 POST 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.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.