Post Holdings, Inc (POST) insider trading
Every open-market stock purchase and sale by Post Holdings, Inc executives, directors, large shareholders and members of Congress, from SEC Form 4 filings. Sector: Other.
Insider activity at a glance
- William P Stiritz (Insider) sold $32.3M in the last 90 days.
- Last company insider buy: David W Kemper (Board member), $176K, 11 months ago.
Last 12 months: insiders bought $176K (1 buy) and sold $34.9M (5 sales). Last close $83.22 on Oct 30, 2026.
Recent POST insider trades
| Date | Insider | Trade | Value |
|---|---|---|---|
| Oct 22, 2026 | Robert V Vitale (Chair) | Sold (not open market) | $4.1M |
| Oct 22, 2026 | Diedre J Gray (C-suite exec) | Sold (not open market) | $1.5M |
| Oct 22, 2026 | Nicolas Catoggio (CEO) | Sold (not open market) | $1.4M |
| Oct 22, 2026 | Jeff A Zadoks (Director) | Sold (not open market) | $1.4M |
| Oct 22, 2026 | Mark W Westphal (Officer) | Sold (not open market) | $1.4M |
| Oct 22, 2026 | Matthew J Mainer (CFO) | Sold (not open market) | $620K |
| Oct 22, 2026 | Matthew J Mainer (CFO) | Bought (not open market) | — |
| Oct 22, 2026 | Mark W Westphal (Officer) | Bought (not open market) | — |
| Oct 22, 2026 | Robert V Vitale (Chair) | Bought (not open market) | — |
| Oct 22, 2026 | Nicolas Catoggio (CEO) | Bought (not open market) | — |
| Oct 22, 2026 | Diedre J Gray (C-suite exec) | Bought (not open market) | — |
| Oct 22, 2026 | Jeff A Zadoks (Director) | Bought (not open market) | — |
| Sep 30, 2026 | David W Kemper (Director) | Bought (not open market) | $17.2K |
| Sep 30, 2026 | David P Skarie (Director) | Bought (not open market) | $13.3K |
| Sep 30, 2026 | Thomas C Erb (Director) | Bought (not open market) | $11.1K |
| Sep 30, 2026 | Jeff A Zadoks (Director) | Bought (not open market) | $11.1K |
| Sep 30, 2026 | Michelle Marie Atkinson (Director) | Bought (not open market) | $11.1K |
| Sep 30, 2026 | Gregory L Curl (Director) | Bought (not open market) | $11.1K |
| Sep 30, 2026 | Jennifer Kuperman Johnson (Director) | Bought (not open market) | $11.1K |
| Sep 30, 2026 | Dorothy M Burwell (Director) | Bought (not open market) | $11.1K |
| Sep 2, 2026 | William P Stiritz (Insider) | Sold | $23.4M |
| Sep 2, 2026 | William P Stiritz (Insider) | Sold | $19.4K |
| Sep 1, 2026 | William P Stiritz (Insider) | Sold | $8.4M |
| Sep 1, 2026 | William P Stiritz (Insider) | Sold | $525K |
| Aug 31, 2026 | David W Kemper (Director) | Bought (not open market) | $17.2K |
Who's trading POST
- Jeff A Zadoks, COO: other filings, last Oct 22, 2026
- Mark W Westphal, Officer: other filings, last Oct 22, 2026
- Robert V Vitale, CEO: other filings, last Oct 22, 2026
- Nicolas Catoggio, CEO: sold $1M (1 sale), last Oct 22, 2026
- Diedre J Gray, C-suite exec: other filings, last Oct 22, 2026
- Matthew J Mainer, CFO: other filings, last Oct 22, 2026
- Jennifer Kuperman Johnson, Director: other filings, last Sep 30, 2026
- Dorothy M Burwell, Director: other filings, last Sep 30, 2026
- Gregory L Curl, Director: sold $1.4M (2 sales), last Sep 30, 2026
- Thomas C Erb, Director: other filings, last Sep 30, 2026
- Michelle Marie Atkinson, Director: other filings, last Sep 30, 2026
- David W Kemper, Director: bought $176K (1 buy), last Sep 30, 2026
- David P Skarie, Director: other filings, last Sep 30, 2026
- William P Stiritz, Director: sold $32.3M (4 sales), last Sep 2, 2026
- Gregory Carl Pearson, CEO: other filings, last Apr 5, 2026
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