Mark W. Westphal serves as Executive at Post Holdings, Inc., where they oversee executive responsibilities. Since joining the company, Mark W. Westphal has executed 45 insider transactions totaling $366.0K, demonstrating a bullish approach to their equity position. Their most recent transaction on Nov 18, 2025 involved receiving (via award) 3,243 shares valued at $0.
Mark W. Westphal currently holds 197,756 shares of Post Holdings, Inc. (POST), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Mark W. Westphal has been a net buyer of POST stock. They have purchased $366.0K and sold $0 worth of shares.
Mark W. Westphal's most recent insider trade was on Nov 18, 2025, when they sold 3,243 shares at $0.00 per share.
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| $N/A |
| Discretionary |
| Nov 15, 2025 | POST | $269.0K | Payment | 2,521 | $106.70 | Discretionary |
| Nov 14, 2025 | POST | $293.2K | Payment | 2,757 | $106.34 | Discretionary |
| Nov 12, 2025 | POST | $149.8K | Payment | 1,413 | $106.02 | Discretionary |
| Nov 12, 2025 | POST | $230.2K | Payment | 2,171 | $106.02 | Discretionary |
| Nov 12, 2025 | POST | $0 | Option Exercise | 4,759 | $N/A | Discretionary |
| Nov 12, 2025 | POST | $0 | Option Exercise | 3,097 | $N/A | Discretionary |
| Oct 22, 2025 | POST | $0 | Award | 43,108 | $N/A | Discretionary |
| Oct 22, 2025 | POST | $2.1M | Payment | 19,658 | $107.19 | Discretionary |
| Nov 17, 2023 | POST | $247.6K | Payment | 2,940 | $84.21 | Discretionary |
| Nov 16, 2023 | POST | $234.7K | Payment | 2,749 | $85.39 | Discretionary |
| Nov 16, 2023 | POST | $0 | Option Exercise | 6,027 | $N/A | Discretionary |
| Nov 15, 2023 | POST | $403.9K | Payment | 4,724 | $85.50 | Discretionary |
| Nov 15, 2023 | POST | $215.5K | Payment | 2,520 | $85.50 | Discretionary |
| Nov 14, 2023 | POST | $0 | Award | 18,133 | $N/A | Discretionary |
| Nov 14, 2023 | POST | $0 | Award | 10,835 | $N/A | Discretionary |
| Oct 24, 2023 | POST | $0 | Award | 39,840 | $N/A | Discretionary |
| Oct 24, 2023 | POST | $1.5M | Payment | 18,168 | $80.91 | Discretionary |
| Dec 4, 2022 | POST | $815.3K | Payment | 8,515 | $95.75 | Discretionary |
| Nov 17, 2022 | POST | $263.5K | Payment | 2,940 | $89.61 | Discretionary |
| Nov 16, 2022 | POST | $246.1K | Payment | 2,748 | $89.57 | Discretionary |
| Nov 16, 2022 | POST | $0 | Option Exercise | 6,026 | $N/A | Discretionary |
| Nov 15, 2022 | POST | $0 | Award | 10,358 | $N/A | Discretionary |
| Nov 15, 2022 | POST | $0 | Award | 16,580 | $N/A | Discretionary |
| Nov 13, 2022 | POST | $209.6K | Payment | 2,432 | $86.19 | Discretionary |
| Oct 15, 2022 | POST | $415.2K | Payment | 4,814 | $86.25 | Discretionary |
| Mar 29, 2022 | POST | $0 | Award | 10,557 | $N/A | Discretionary |
| Nov 17, 2021 | POST | $160.7K | Payment | 1,517 | $105.95 | Discretionary |
| Nov 13, 2021 | POST | $117.4K | Payment | 1,101 | $106.62 | Discretionary |