Post Holdings, Inc. Insider Trading Activity
Every SEC Form 4 insider transaction reported for Post Holdings, Inc. (POST), sourced directly from SEC EDGAR and updated as new filings are accepted.
By Trabud · Insider-trading data from SEC EDGAR
Latest filing:
Compiled automatically from SEC EDGAR Form 4 filings and refreshed daily. Figures count purchases (code P) and sales (code S) only — not grants, option exercises, or gifts. How this page is built. Not investment advice.
Quick Answer
Are POST insiders buying or selling?
In the last 12 months, Post Holdings, Inc. insiders reported 1 open-market purchase ($176.3K) and 5 sales ($34.9M) — net selling of $34.7M. Since February 2018, Trabud has recorded 91 Form 4 filings for POST: 22 buys ($52.0M) and 69 sells ($66.8M).
Source: SEC EDGAR Form 4
Key Statistics (February 2018 – Sep 3, 2026)
Total Form 4 filings
91
SEC EDGAR
Insider filers
16
Insider buys (22)
$52.0M
Insider sells (69)
$66.8M
Insider sentiment
Net sellingNet insider flow of $14.9M in net selling since February 2018, and $34.7M in net selling over the last 12 months.
Recent POST insider transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Sep 3, 2026 | William P Stiritz | Other | Sale | 384.1K | $84.06 | $32.3M | SEC ↗ |
| May 14, 2026 | Gregory L Curl | Director | Sale | 6.2K | $105.05 | $649.8K | SEC ↗ |
| Feb 10, 2026 | Gregory L Curl | Director | Sale | 7.0K | $114.31 | $798.2K | SEC ↗ |
| Dec 8, 2025 | Bradly A Harper | SVP, CHIEF ACCTING OFFICER | Sale | 1.7K | $96.69 | $160.3K | SEC ↗ |
| Nov 26, 2025 | Nicolas Catoggio | PRES & CEO, PCB | Sale | 10.0K | $100.21 | $1.0M | SEC ↗ |
| Nov 25, 2025 | David W Kemper | Director | Purchase | 1.8K | $97.93 | $176.3K | SEC ↗ |
| Aug 21, 2025 | William P Stiritz | Director | Purchase | 36.0K | $109.53 | $3.9M | SEC ↗ |
| Jun 9, 2025 | William P Stiritz | Director | Purchase | 186.7K | $109.12 | $20.4M | SEC ↗ |
| Jun 9, 2025 | Nicolas Catoggio | PRES & CEO, PCB | Sale | 1.8K | $108.97 | $190.7K | SEC ↗ |
| Mar 10, 2025 | Nicolas Catoggio | PRES & CEO, PCB | Sale | 5.0K | $117.00 | $585.0K | SEC ↗ |
| Mar 5, 2025 | Bradly A Harper | SVP, CHIEF ACCTING OFFICER | Sale | 2.0K | $114.59 | $229.2K | SEC ↗ |
| Mar 4, 2025 | Nicolas Catoggio | PRES & CEO, PCB | Sale | 5.0K | $114.50 | $572.5K | SEC ↗ |
| Feb 26, 2025 | Nicolas Catoggio | PRES & CEO, PCB | Sale | 5.0K | $116.50 | $582.5K | SEC ↗ |
| Feb 26, 2025 | Robert V Vitale | PRESIDENT & CEO | Sale | 63.2K | $115.84 | $7.3M | SEC ↗ |
| Feb 25, 2025 | Diedre J Gray | EVP, GC & CAO, SECY | Sale | 15.2K | $115.80 | $1.8M | SEC ↗ |
| Feb 13, 2025 | Nicolas Catoggio | PRES & CEO, PCB | Sale | 10.0K | $111.73 | $1.1M | SEC ↗ |
| Feb 12, 2025 | David W Kemper | Director | Sale | 8.9K | $110.75 | $990.0K | SEC ↗ |
| Dec 6, 2024 | Bradly A Harper | SVP, CHIEF ACCTING OFFICER | Sale | 1.0K | $120.09 | $120.1K | SEC ↗ |
| Dec 3, 2024 | Nicolas Catoggio | PRES & CEO, PCB | Sale | 6.0K | $121.14 | $726.8K | SEC ↗ |
| Dec 2, 2024 | Jeff A Zadoks | EVP & COO | Sale | 29.0K | $119.96 | $3.5M | SEC ↗ |
| Nov 25, 2024 | Gregory L Curl | Director | Sale | 1.4K | $114.20 | $158.5K | SEC ↗ |
| Nov 19, 2024 | Nicolas Catoggio | PRES & CEO, PCB | Sale | 6.5K | $109.18 | $709.7K | SEC ↗ |
| Sep 5, 2024 | Ellen F Harshman | Director | Sale | 200 | $117.50 | $23.5K | SEC ↗ |
| Aug 19, 2024 | Bradly A Harper | SVP, CHIEF ACCTING OFFICER | Sale | 1.3K | $113.43 | $152.7K | SEC ↗ |
| Aug 13, 2024 | Thomas C Erb | Director | Purchase | 2.0K | $112.94 | $225.9K | SEC ↗ |
Showing the 25 most recent of 91 Form 4 filings for Post Holdings, Inc..
Most active POST insiders
- Nicolas Catoggio14 filings
- Bradly A Harper13 filings
- Ellen F Harshman11 filings
- Thomas C Erb9 filings
- Robert E Grote7 filings
Ask anything about POST insider activity
Use Trabud's AI agent to query Post Holdings, Inc.'s Form 4 history in plain English — "Show me POST CEO purchases this year" or compare it against any other ticker.
Open the AI agentPOST insider trading FAQ
Are Post Holdings, Inc. insiders buying or selling?
In the last 12 months, Post Holdings, Inc. insiders reported 1 open-market purchase ($176.3K) and 5 sales ($34.9M) — net selling of $34.7M. Since February 2018, Trabud has recorded 91 Form 4 filings for POST: 22 buys ($52.0M) and 69 sells ($66.8M). Over the full record that is net selling of $14.9M.
How many insiders trade POST stock?
16 distinct insider filers — officers, directors, 10%+ owners, and investment groups filing jointly — have reported Form 4 transactions for Post Holdings, Inc.. The most recent filing was accepted on Sep 3, 2026.
Where does Trabud get POST insider trading data?
All POST insider trading data comes directly from official SEC EDGAR Form 4 filings, which corporate insiders must submit within two business days of a transaction under Section 16(a) of the Securities Exchange Act of 1934.