Post Holdings's top three insider shareholders as of September 29, 2026 are William P Stiritz (Chairman And Ceo, 4.33Mn shares), Robert V Vitale (President Ceo, 987.34K shares), Robert V Vitale (President Ceo, 487.76K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | William P Stiritz | Chairman And Ceo | 4,334,667 | 0 | 4,334,667 | 68.6% | 19 Dec, 2025 |
| 2 | Robert V Vitale | President Ceo | 987,338 | 0 | 987,338 | 15.6% | 20 Nov, 2025 |
| 3 | Mark W Westphal | Pres., Foodservice | 197,756 | 0 | 197,756 | 3.1% | 20 Nov, 2025 |
| 4 | Jeff A Zadoks | Director | 0 | 197,100 | 197,100 | 3.1% | 27 Aug, 2026 |
| 5 | Diedre J Gray | Evp, Gc Cao, Secy | 0 | 164,903 | 164,903 | 2.6% | 29 Dec, 2025 |
| 6 | Nicolas Catoggio | Pres Ceo, Pcb | 75,542 | 0 | 75,542 | 1.2% | 26 Nov, 2025 |
| 7 | Matthew J Mainer | Evp, Cfo Treasurer | 74,670 | 0 | 74,670 | 1.2% | 05 Dec, 2025 |
| 8 | Howard A Friedman | Evp Coo | 69,948 | 0 | 69,948 | 1.1% | 18 Nov, 2021 |
| 9 | David P Skarie | Director | 56,991 | 0 | 56,991 | 0.9% | 05 Feb, 2026 |
| 10 | Thomas C Erb | Director | 38,675 | 0 | 38,675 | 0.6% | 05 Feb, 2026 |
| 11 | David W Kemper | Director | 33,122 | 0 | 33,122 | 0.5% | 05 Feb, 2026 |
| 12 | Edwin H Callison | Director | 17,045 | 0 | 17,045 | 0.3% | 04 Apr, 2022 |
| 13 | Gregory L Curl | Director | 15,107 | 0 | 15,107 | 0.2% | 14 May, 2026 |
| 14 | Bradly A Harper | Svp, Chief Accting Officer | 10,963 | 0 | 10,963 | 0.2% | 12 Jan, 2026 |
| 15 | Ellen F Harshman | Director | 10,372 | 0 | 10,372 | 0.2% | 05 Sep, 2024 |
| 16 | Robert E Grote | Director | 9,665 | 0 | 9,665 | 0.2% | 20 Nov, 2024 |
| 17 | Jennifer Kuperman Johnson | Director | 8,675 | 0 | 8,675 | 0.1% | 05 Feb, 2026 |
| 18 | Dorothy M Burwell | Director | 8,665 | 0 | 8,665 | 0.1% | 05 Feb, 2026 |
| 19 | Gregory Carl Pearson | Pres Ceo, Pcb | 8,485 | 0 | 8,485 | 0.1% | 06 Apr, 2026 |
| 20 | Michelle Marie Atkinson | Director | 1,700 | 0 | 1,700 | 0.0% | 18 Mar, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 01 Sep, 2026 | William P Stiritz | Other | Disposed S | 99,990 | $83.54 | $8.35Mn | 284,142 | Indirect |
| 01 Sep, 2026 | William P Stiritz | Other | Disposed S | 6,207 | $84.63 | $525.30K | 277,935 | Indirect |
| 02 Sep, 2026 | William P Stiritz | Other | Disposed S | 277,707 | $84.23 | $23.39Mn | 228 | Indirect |
| 02 Sep, 2026 | William P Stiritz | Other | Disposed S | 228 | $85.01 | $19.38K | 0 | Indirect |
| 31 Aug, 2026 | Gregory L Curl | Director | Acquired A | 133 | $83.36 | $11.11K | 8,060 | Direct |
| 31 Aug, 2026 | Jeff A Zadoks | Director | Acquired A | 133 | $83.36 | $11.11K | 670 | Direct |
| 31 Aug, 2026 | David W Kemper | Director | Acquired A | 207 | $83.36 | $17.22K | 21,328 | Direct |
| 31 Aug, 2026 | Jennifer Kuperman Johnson | Director | Acquired A | 133 | $83.36 | $11.11K | 7,360 | Direct |
| 31 Aug, 2026 | Dorothy M Burwell | Director | Acquired A | 133 | $83.36 | $11.11K | 8,872 | Direct |
| 31 Aug, 2026 | Thomas C Erb | Director | Acquired A | 133 | $83.36 | $11.11K | 7,360 | Direct |
| 31 Aug, 2026 | David P Skarie | Director | Acquired A | 160 | $83.36 | $13.33K | 33,832 | Direct |
| 31 Aug, 2026 | Michelle Marie Atkinson | Director | Acquired A | 133 | $83.36 | $11.11K | 670 | Direct |
| 25 Aug, 2026 | Jeff A Zadoks | Director | Disposed G | 26,215 | $0.00 | $0 | 1,800 | Direct |
| 25 Aug, 2026 | Jeff A Zadoks | Director | Acquired G | 26,215 | $0.00 | $0 | 74,360 | Indirect |
| 25 Aug, 2026 | Jeff A Zadoks | Director | Disposed G | 122,740 | $0.00 | $0 | 0 | Indirect |
| 25 Aug, 2026 | Jeff A Zadoks | Director | Acquired G | 122,740 | $0.00 | $0 | 122,740 | Indirect |
| 31 Jul, 2026 | Thomas C Erb | Director | Acquired A | 122 | $91.41 | $11.11K | 7,222 | Direct |
| 31 Jul, 2026 | Jeff A Zadoks | Director | Acquired A | 122 | $91.41 | $11.11K | 536 | Direct |
| 31 Jul, 2026 | Gregory L Curl | Director | Acquired A | 122 | $91.41 | $11.11K | 7,921 | Direct |
| 31 Jul, 2026 | David P Skarie | Director | Acquired A | 146 | $91.41 | $13.33K | 33,649 | Direct |