Matthew J. Mainer serves as Executive at Post Holdings, Inc., where they oversee executive responsibilities. Since joining the company, Matthew J. Mainer has executed 28 insider transactions totaling $0, demonstrating a balanced approach to their equity position. Their most recent transaction on Dec 4, 2025 involved gifting 600 shares valued at $0.
Matthew J. Mainer currently holds 74,670 shares of Post Holdings, Inc. (POST), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Matthew J. Mainer has been a net neutral trader of POST stock. They have purchased $0 and sold $0 worth of shares.
Matthew J. Mainer's most recent insider trade was on Dec 4, 2025, when they sold 600 shares at $0.00 per share.
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| $104.03 |
| Discretionary |
| Nov 18, 2025 | POST | $0 | Award | 17,338 | $N/A | Discretionary |
| Nov 18, 2025 | POST | $0 | Award | 8,123 | $N/A | Discretionary |
| Nov 15, 2025 | POST | $100.0K | Payment | 937 | $106.70 | Discretionary |
| Nov 14, 2025 | POST | $132.8K | Payment | 1,249 | $106.34 | Discretionary |
| Nov 12, 2025 | POST | $280.6K | Payment | 2,647 | $106.02 | Discretionary |
| Nov 12, 2025 | POST | $0 | Option Exercise | 3,916 | $N/A | Discretionary |
| Nov 12, 2025 | POST | $182.9K | Payment | 1,725 | $106.02 | Discretionary |
| Nov 12, 2025 | POST | $0 | Option Exercise | 6,008 | $N/A | Discretionary |
| Oct 22, 2025 | POST | $783.3K | Payment | 7,308 | $107.19 | Discretionary |
| Oct 22, 2025 | POST | $0 | Award | 16,588 | $N/A | Discretionary |
| Dec 1, 2023 | POST | $30.8K | Payment | 360 | $85.53 | Discretionary |
| Dec 1, 2023 | POST | $23.1K | Payment | 270 | $85.53 | Discretionary |
| Dec 1, 2023 | POST | $66.3K | Payment | 775 | $85.53 | Discretionary |
| Dec 1, 2023 | POST | $175.7K | Payment | 2,054 | $85.53 | Discretionary |
| Nov 20, 2023 | POST | $35.9K | Payment | 417 | $86.17 | Discretionary |
| Nov 20, 2023 | POST | $53.9K | Payment | 626 | $86.17 | Discretionary |
| Nov 20, 2023 | POST | $26.5K | Payment | 308 | $86.17 | Discretionary |
| Nov 15, 2023 | POST | $80.5K | Payment | 942 | $85.50 | Discretionary |
| Nov 14, 2023 | POST | $0 | Award | 5,445 | $N/A | Discretionary |
| Nov 14, 2023 | POST | $0 | Award | 2,408 | $N/A | Discretionary |
| Nov 14, 2023 | POST | $0 | Award | 8,502 | $N/A | Discretionary |
| Aug 20, 2023 | POST | $15.0K | Payment | 170 | $88.09 | Discretionary |
| Dec 1, 2022 | POST | $194.8K | Payment | 2,070 | $94.09 | Discretionary |
| Dec 1, 2022 | POST | $25.6K | Payment | 272 | $94.09 | Discretionary |
| Dec 1, 2022 | POST | $34.2K | Payment | 363 | $94.09 | Discretionary |
| Dec 1, 2022 | POST | $73.5K | Payment | 781 | $94.09 | Discretionary |