Company · CIK 0001530950 · SIC 2040 — Grain Mill Products · NYSE
Post Holdings, Inc. · POST
Insider activity reported against this company. All insider holders · On EDGAR ↗
Reported at this company — common stock
| Trade | Reported (ET) | Insider | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Sep 1, 2026 SForm 4 → | Sep 3, 5:12 pm EDT | William P StiritzOther | 384,132 | $84.06 | $32,289,106 | 0 | −100% | |
| Aug 25, 2026 GForm 4 → | Aug 27, 5:06 pm EDT | Jeff A ZadoksDirector | 297,910 | — | — | 122,740 | — | |
| Jul 2, 2026 FForm 4 → | Jul 7, 5:01 pm EDT | Jeff A ZadoksDirector | 9,962 | $90.94 | $905,944 | 28,015 | — |
Reported at this company — derivatives (options, RSUs, warrants)
| Trade | Reported (ET) | Insider | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Aug 31, 2026 AForm 4 → | Sep 2, 4:42 pm EDT | Jeff A ZadoksDirector | 133 | $83.36 | $11,111 | 670 | — | |
| Aug 31, 2026 AForm 4 → | Sep 2, 4:42 pm EDT | David P SkarieDirector | 160 | $83.36 | $13,333 | 33,832 | — | |
| Aug 31, 2026 AForm 4 → | Sep 2, 4:41 pm EDT | Jennifer Kuperman JohnsonDirector | 133 | $83.36 | $11,111 | 7,360 | — | |
| Aug 31, 2026 AForm 4 → | Sep 2, 4:40 pm EDT | David W KemperDirector | 207 | $83.36 | $17,222 | 21,328 | — | |
| Aug 31, 2026 AForm 4 → | Sep 2, 4:39 pm EDT | Thomas C ErbDirector | 133 | $83.36 | $11,111 | 7,360 | — | |
| Aug 31, 2026 AForm 4 → | Sep 2, 4:38 pm EDT | Gregory L CurlDirector | 133 | $83.36 | $11,111 | 8,060 | — | |
| Aug 31, 2026 AForm 4 → | Sep 2, 4:37 pm EDT | Dorothy M BurwellDirector | 133 | $83.36 | $11,111 | 8,872 | — | |
| Aug 31, 2026 AForm 4 → | Sep 2, 4:35 pm EDT | Michelle Marie AtkinsonDirector | 133 | $83.36 | $11,111 | 670 | — | |
| Jul 31, 2026 AForm 4 → | Aug 4, 4:49 pm EDT | Jeff A ZadoksDirector | 122 | $91.41 | $11,111 | 536 | — | |
| Jul 31, 2026 AForm 4 → | Aug 4, 4:48 pm EDT | David P SkarieDirector | 146 | $91.41 | $13,333 | 33,649 | — | |
| Jul 31, 2026 AForm 4 → | Aug 4, 4:47 pm EDT | Jennifer Kuperman JohnsonDirector | 122 | $91.41 | $11,111 | 7,222 | — | |
| Jul 31, 2026 AForm 4 → | Aug 4, 4:45 pm EDT | David W KemperDirector | 188 | $91.41 | $17,222 | 21,106 | — | |
| Jul 31, 2026 AForm 4 → | Aug 4, 4:44 pm EDT | Thomas C ErbDirector | 122 | $91.41 | $11,111 | 7,222 | — | |
| Jul 31, 2026 AForm 4 → | Aug 4, 4:43 pm EDT | Gregory L CurlDirector | 122 | $91.41 | $11,111 | 7,921 | — | |
| Jul 31, 2026 AForm 4 → | Aug 4, 4:41 pm EDT | Dorothy M BurwellDirector | 122 | $91.41 | $11,111 | 8,733 | — | |
| Jul 31, 2026 AForm 4 → | Aug 4, 4:39 pm EDT | Michelle Marie AtkinsonDirector | 122 | $91.41 | $11,111 | 536 | — | |
| Jun 30, 2026 AForm 4 → | Jul 2, 4:41 pm EDT | Jeff A ZadoksDirector | 126 | $88.26 | $11,111 | 415 | — | |
| Jun 30, 2026 AForm 4 → | Jul 2, 4:39 pm EDT | David P SkarieDirector | 151 | $88.26 | $13,333 | 33,513 | — | |
| Jun 30, 2026 AForm 4 → | Jul 2, 4:38 pm EDT | Jennifer Kuperman JohnsonDirector | 126 | $88.26 | $11,111 | 7,103 | — | |
| Jun 30, 2026 AForm 4 → | Jul 2, 4:37 pm EDT | David W KemperDirector | 195 | $88.26 | $17,222 | 20,925 | — | |
| Jun 30, 2026 AForm 4 → | Jul 2, 4:36 pm EDT | Thomas C ErbDirector | 126 | $88.26 | $11,111 | 7,103 | — | |
| Jun 30, 2026 AForm 4 → | Jul 2, 4:35 pm EDT | Gregory L CurlDirector | 126 | $88.26 | $11,111 | 7,802 | — | |
| Jun 30, 2026 AForm 4 → | Jul 2, 4:34 pm EDT | Dorothy M BurwellDirector | 126 | $88.26 | $11,111 | 8,614 | — | |
| Jun 30, 2026 AForm 4 → | Jul 2, 4:33 pm EDT | Michelle Marie AtkinsonDirector | 126 | $88.26 | $11,111 | 415 | — |