William P. Stiritz, a director at Post Holdings, Inc. ($POST), made two open market purchases of company shares in the last year, totaling $24.3 million. His most recent buy occurred on August 19, 2025. These purchases rank him 50th among nearly 5,000 individual insiders by dollar amount, well above the average of $1.5 million across about 3.3 transactions per insider. Stiritz reported no open market sales during this period.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dec. 17, 2025 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Other | M | Post Holdings, Inc. Stock Equivalents | 10703 | $0.00 | 170,000.7970 | 62,900,000 | 5.92% | 0.02% |
| Dec. 18, 2025 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Other | M | Common Stock | 170001 | $0.00 | 5,058,168.7970 | 62,900,000 | 3.48% | 0.27% |
| Dec. 18, 2025 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Other | D | Common Stock | 170001 | $101.81 | 4,888,168.0000 | 62,900,000 | 3.36% | 0.27% |
| Dec. 18, 2025 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Other | M | Post Holdings, Inc. Stock Equivalents | 170001 | $0.00 | 0.0000 | 62,900,000 | 100.00% | 0.27% |
| Dec. 17, 2025 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Other | M | Common Stock | 10703 | $0.00 | 4,898,871.2250 | 62,900,000 | 0.22% | 0.02% |
| Dec. 17, 2025 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Other | D | Common Stock | 10703 | $101.19 | 4,888,168.0000 | 62,900,000 | 0.22% | 0.02% |
| Dec. 16, 2025 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | A | Post Holdings, Inc. Stock Equivalents | 58 | $98.93 | 180,721.7570 | 62,900,000 | 0.03% | 0.00% |
| Nov. 28, 2025 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | A | Post Holdings, Inc. Stock Equivalents | 107 | $104.03 | 180,638.3180 | 62,900,000 | 0.06% | 0.00% |
| Oct. 31, 2025 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | A | Post Holdings, Inc. Stock Equivalents | 107 | $103.93 | 180,542.6170 | 62,900,000 | 0.06% | 0.00% |
| Sept. 30, 2025 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | A | Post Holdings, Inc. Stock Equivalents | 103 | $107.48 | 180,447.2870 | 63,600,000 | 0.06% | 0.00% |
| Aug. 29, 2025 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | A | Post Holdings, Inc. Stock Equivalents | 98 | $113.15 | 180,356.9620 | 63,600,000 | 0.05% | 0.00% |
| Aug. 19, 2025 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | P | Common Stock | 36000 | $109.53 | 4,888,168.0000 | 63,600,000 | 0.74% | 0.06% |
| July 31, 2025 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | A | Post Holdings, Inc. Stock Equivalents | 105 | $105.81 | 180,273.7640 | 63,600,000 | 0.06% | 0.00% |
| June 30, 2025 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | A | Post Holdings, Inc. Stock Equivalents | 102 | $109.03 | 180,157.1570 | 65,200,000 | 0.06% | 0.00% |
| June 5, 2025 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | P | Common Stock | 186740 | $109.12 | 4,852,168.0000 | 65,200,000 | 4.00% | 0.29% |
| May 30, 2025 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | A | Post Holdings, Inc. Stock Equivalents | 100 | $110.59 | 180,054.9250 | 65,200,000 | 0.06% | 0.00% |
| April 30, 2025 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | A | Post Holdings, Inc. Stock Equivalents | 98 | $113.17 | 179,969.2000 | 65,200,000 | 0.05% | 0.00% |
| March 31, 2025 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | A | Post Holdings, Inc. Stock Equivalents | 95 | $116.36 | 179,906.4680 | 65,200,000 | 0.05% | 0.00% |
| Feb. 28, 2025 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | A | Post Holdings, Inc. Stock Equivalents | 98 | $113.51 | 179,829.9130 | 65,200,000 | 0.05% | 0.00% |
| Feb. 4, 2025 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | A | Common Stock | 2500 | $0.00 | 4,665,428.0000 | 65,200,000 | 0.05% | 0.00% |
| Jan. 31, 2025 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | A | Post Holdings, Inc. Stock Equivalents | 105 | $106.16 | 179,821.6380 | 65,200,000 | 0.06% | 0.00% |
| Dec. 31, 2024 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | A | Post Holdings, Inc. Stock Equivalents | 97 | $114.46 | 179,702.5760 | 66,900,000 | 0.05% | 0.00% |
| Nov. 29, 2024 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | A | Post Holdings, Inc. Stock Equivalents | 92 | $120.48 | 179,599.5530 | 66,900,000 | 0.05% | 0.00% |
| Oct. 31, 2024 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | A | Post Holdings, Inc. Stock Equivalents | 102 | $109.21 | 179,535.0890 | 66,900,000 | 0.06% | 0.00% |
| Sept. 30, 2024 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | A | Post Holdings, Inc. Stock Equivalents | 96 | $115.75 | 179,441.2870 | 67,300,000 | 0.05% | 0.00% |
| Aug. 30, 2024 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | A | Post Holdings, Inc. Stock Equivalents | 96 | $115.77 | 179,362.5950 | 67,300,000 | 0.05% | 0.00% |
| July 31, 2024 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | A | Post Holdings, Inc. Stock Equivalents | 102 | $109.36 | 179,302.0540 | 67,300,000 | 0.06% | 0.00% |
| June 28, 2024 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | A | Post Holdings, Inc. Stock Equivalents | 107 | $104.16 | 179,248.6080 | 67,000,000 | 0.06% | 0.00% |
| May 31, 2024 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | A | Post Holdings, Inc. Stock Equivalents | 104 | $106.57 | 179,174.8330 | 67,000,000 | 0.06% | 0.00% |
| April 30, 2024 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | A | Post Holdings, Inc. Stock Equivalents | 105 | $106.15 | 179,096.1250 | 67,000,000 | 0.06% | 0.00% |
| March 28, 2024 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | A | Post Holdings, Inc. Stock Equivalents | 105 | $106.28 | 178,982.2800 | 67,000,000 | 0.06% | 0.00% |
| Feb. 29, 2024 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | A | Post Holdings, Inc. Stock Equivalents | 107 | $104.16 | 178,935.5020 | 67,000,000 | 0.06% | 0.00% |
| Jan. 31, 2024 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | A | Post Holdings, Inc. Stock Equivalents | 120 | $92.87 | 178,929.3000 | 67,000,000 | 0.07% | 0.00% |
| Jan. 30, 2024 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | A | Common Stock | 2700 | $0.00 | 4,662,928.0000 | 67,000,000 | 0.06% | 0.00% |
| Dec. 29, 2023 | Post Holdings, Inc. | $POST | STIRITZ WILLIAM P | Director | A | Post Holdings, Inc. Stock Equivalents | 126 | $88.06 | 178,847.6660 | 67,000,000 | 0.07% | 0.00% |