Real time insider trading transaction history:
- Insiders are prohibited from making short-swing profits by trading their shares within 6 months of the registration or acquiring the shares.
- Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>
Common stock purchase or sale:
| Transaction Date | Reported DateTime | Company | Symbol | Insider Relationship | Shares Traded | Average Price | Total Amount | Shares Owned | Filing |
| 2026-08-11 Sale | 2026-08-12 6:14 pm | Amphastar Pharmaceuticals Inc. | AMPH | PRINS RICHARD K Director | 7,973 | $20.3 | $161,852 | 29,625 (Direct) | View |
| 2026-08-07 Sale | 2026-08-11 4:57 pm | Amphastar Pharmaceuticals Inc. | AMPH | PETERS WILLIAM J CFO, EVP & TREASURER | 8,180 | $22.48 | $183,886 | 172,846 (Direct) | View |
| 2025-12-17 Sale | 2025-12-18 5:23 pm | Amphastar Pharmaceuticals Inc. | AMPH | Zhou Rong SENIOR EVP, PRODUCTION CENTER | 9,787 | $26.2 | $256,379 | 242,711 (Indirect Direct) | View |
| 2025-12-11 Sale | 2025-12-15 5:17 pm | Amphastar Pharmaceuticals Inc. | AMPH | Petersen Floyd F. Director | 4,163 | $25.82 | $107,508 | 71,368 (Direct) | View |
| 2025-11-25 Sale | 2025-11-25 7:38 pm | Amphastar Pharmaceuticals Inc. | AMPH | PRINS RICHARD K Director | 4,179 | $27.1 | $113,253 | 35,183 (Direct) | View |
| 2025-11-13 Sale | 2025-11-17 4:16 pm | Amphastar Pharmaceuticals Inc. | AMPH | Petersen Floyd F. Director | 16,679 | $26.49 | $441,837 | 75,531 (Direct) | View |
| 2025-11-03 Sale | 2025-11-05 4:20 pm | Amphastar Pharmaceuticals Inc. | AMPH | Petersen Floyd F. Director | 500 | $25.27 | $12,633 | 75,531 (Direct) | View |
| 2025-10-01 Sale | 2025-10-02 5:04 pm | Amphastar Pharmaceuticals Inc. | AMPH | Petersen Floyd F. Director | 500 | $27.2 | $13,602 | 76,031 (Direct) | View |
| 2025-09-02 Sale | 2025-09-03 4:20 pm | Amphastar Pharmaceuticals Inc. | AMPH | Petersen Floyd F. Director | 500 | $30.98 | $15,492 | 76,531 (Direct) | View |
| 2025-08-01 Sale | 2025-08-04 7:17 pm | Amphastar Pharmaceuticals Inc. | AMPH | Petersen Floyd F. Director | 500 | $20.83 | $10,416 | 77,031 (Direct) | View |
| 2025-07-02 Sale | 2025-07-03 5:30 pm | Amphastar Pharmaceuticals Inc. | AMPH | Petersen Floyd F. Director | 500 | $23.47 | $11,734 | 77,531 (Direct) | View |
Stock options: Exercise, Award, Grant, Conversion
| Transaction Date | Reported DateTime | Exercisable Expiration | Company | Symnbol | Insider Relationship | Shares Traded | Conversion Price | Shares Owned | Filing |
| 2026-08-07 Exercise | 2026-08-11 4:57 pm | N/A 2028-03-15 | Amphastar Pharmaceuticals Inc. | AMPH | PETERS WILLIAM J CFO, EVP & TREASURER | 5,053 | $0 | 172,846 (Direct) | View |
| 2026-08-07 Exercise | 2026-08-11 4:57 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | PETERS WILLIAM J CFO, EVP & TREASURER | 5,053 | $19.79 | 172,846 (Direct) | View |
| 2026-07-09 Option Award | 2026-07-13 7:38 pm | N/A 2036-07-09 | Amphastar Pharmaceuticals Inc. | AMPH | Pierce Anthony T Director | 24,532 | $0 | 24,532 (Direct) | View |
| 2024-08-19 Gift | 2026-06-03 9:22 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | PRINS RICHARD K Director | 1,500 | $0 | 54,963 (Direct) | View |
| 2026-06-01 Option Award | 2026-06-03 9:22 pm | N/A 2036-06-01 | Amphastar Pharmaceuticals Inc. | AMPH | PRINS RICHARD K Director | 25,508 | $0 | 54,963 (Direct) | View |
| 2026-06-01 Option Award | 2026-06-03 9:20 pm | N/A 2036-06-01 | Amphastar Pharmaceuticals Inc. | AMPH | Lee Howard Director | 25,508 | $0 | 176,715 (Direct) | View |
| 2026-06-02 Tax Withholding | 2026-06-03 9:20 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Lee Howard Director | 769 | $18.45 | 176,715 (Direct) | View |
| 2026-06-01 Option Award | 2026-06-03 8:34 pm | N/A 2036-06-01 | Amphastar Pharmaceuticals Inc. | AMPH | ZASLOFF MICHAEL A Director | 25,508 | $0 | 55,032 (Direct) | View |
| 2026-06-01 Option Award | 2026-06-03 8:33 pm | N/A 2036-06-01 | Amphastar Pharmaceuticals Inc. | AMPH | Gerst Diane G. Director | 25,508 | $0 | 49,264 (Direct) | View |
| 2026-06-01 Option Award | 2026-06-03 8:31 pm | N/A 2036-06-01 | Amphastar Pharmaceuticals Inc. | AMPH | Gaugh David Russell Director | 25,508 | $0 | 31,812 (Direct) | View |
| 2026-06-01 Option Award | 2026-06-03 8:29 pm | N/A 2036-06-01 | Amphastar Pharmaceuticals Inc. | AMPH | Deflin Gayle Director | 25,508 | $0 | 36,422 (Direct) | View |
| 2026-03-15 Tax Withholding | 2026-03-17 8:17 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Liawatidewi Yakob EVP CORP ADMIN CENTER | 1,033 | $18.18 | 124,351 (Direct) | View |
| 2026-03-15 Tax Withholding | 2026-03-17 6:16 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhou Rong SENIOR EVP, PRODUCTION CENTER | 1,225 | $18.18 | 276,222 (Direct) | View |
| 2026-03-15 Tax Withholding | 2026-03-17 6:14 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | PETERS WILLIAM J CFO, EVP & TREASURER | 1,973 | $18.18 | 175,063 (Direct) | View |
| 2026-03-15 Tax Withholding | 2026-03-17 6:12 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & CHIEF SCIENTIFIC OFFICER 10% Owner | 12,692 | $18.18 | 11,062,856 (Direct) | View |
| 2026-03-10 Tax Withholding | 2026-03-11 9:29 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | PETERS WILLIAM J CFO, EVP & TREASURER | 3,297 | $18.91 | 298,107 (Direct) | View |
| 2026-03-09 Option Award | 2026-03-11 9:29 pm | N/A 2036-03-09 | Amphastar Pharmaceuticals Inc. | AMPH | PETERS WILLIAM J CFO, EVP & TREASURER | 179,764 | $0 | 298,107 (Direct) | View |
| 2026-03-10 Tax Withholding | 2026-03-11 8:15 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhou Rong SENIOR EVP, PRODUCTION CENTER | 2,215 | $18.91 | 358,788 (Direct) | View |
| 2026-03-09 Option Award | 2026-03-11 8:15 pm | N/A 2036-03-09 | Amphastar Pharmaceuticals Inc. | AMPH | Zhou Rong SENIOR EVP, PRODUCTION CENTER | 120,773 | $0 | 358,788 (Direct) | View |
| 2026-03-10 Tax Withholding | 2026-03-11 6:26 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Liawatidewi Yakob EVP CORP ADMIN CENTER | 1,870 | $18.91 | 198,510 (Direct) | View |
| 2026-03-09 Option Award | 2026-03-11 6:26 pm | N/A 2036-03-09 | Amphastar Pharmaceuticals Inc. | AMPH | Liawatidewi Yakob EVP CORP ADMIN CENTER | 108,576 | $0 | 198,510 (Direct) | View |
| 2026-03-10 Tax Withholding | 2026-03-11 5:58 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & CHIEF SCIENTIFIC OFFICER 10% Owner | 19,180 | $18.91 | 11,597,358 (Direct) | View |
| 2026-03-09 Option Award | 2026-03-11 5:58 pm | N/A 2036-03-09 | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & CHIEF SCIENTIFIC OFFICER 10% Owner | 774,776 | $0 | 11,597,358 (Direct) | View |
| 2026-03-06 Tax Withholding | 2026-03-10 9:03 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | PETERS WILLIAM J CFO, EVP & TREASURER | 2,146 | $19.34 | 121,640 (Direct) | View |
| 2026-03-06 Tax Withholding | 2026-03-10 5:44 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhou Rong SENIOR EVP, PRODUCTION CENTER | 1,357 | $19.34 | 240,230 (Direct) | View |
| 2026-03-06 Tax Withholding | 2026-03-10 5:42 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Liawatidewi Yakob EVP CORP ADMIN CENTER | 1,144 | $19.34 | 91,804 (Direct) | View |
| 2026-03-06 Tax Withholding | 2026-03-10 5:41 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & CHIEF SCIENTIFIC OFFICER 10% Owner | 10,850 | $19.34 | 10,841,762 (Direct) | View |
| 2026-03-04 Tax Withholding | 2026-03-06 9:58 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & CHIEF SCIENTIFIC OFFICER 10% Owner | 8,201 | $19.96 | 10,852,612 (Direct) | View |
| 2026-03-04 Tax Withholding | 2026-03-06 9:06 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhou Rong SENIOR EVP, PRODUCTION CENTER | 1,124 | $19.96 | 241,587 (Direct) | View |
| 2026-03-04 Tax Withholding | 2026-03-06 9:04 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Liawatidewi Yakob EVP CORP ADMIN CENTER | 965 | $19.96 | 92,948 (Direct) | View |
| 2026-03-04 Tax Withholding | 2026-03-06 9:02 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | PETERS WILLIAM J CFO, EVP & TREASURER | 1,744 | $19.96 | 123,786 (Direct) | View |
| 2025-12-17 Exercise | 2025-12-18 5:23 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhou Rong SENIOR EVP, PRODUCTION CENTER | 9,787 | $11.33 | 242,711 (Direct) | View |
| 2025-12-17 Exercise | 2025-12-18 5:23 pm | N/A 2026-03-17 | Amphastar Pharmaceuticals Inc. | AMPH | Zhou Rong SENIOR EVP, PRODUCTION CENTER | 9,787 | $0 | 242,711 (Direct) | View |
| 2025-11-25 Exercise | 2025-11-25 7:38 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | PRINS RICHARD K Director | 4,179 | $16.69 | 35,183 (Direct) | View |
| 2025-11-25 Exercise | 2025-11-25 7:38 pm | N/A 2026-06-07 | Amphastar Pharmaceuticals Inc. | AMPH | PRINS RICHARD K Director | 4,179 | $0 | 35,183 (Direct) | View |
| 2025-11-13 Exercise | 2025-11-17 4:16 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Petersen Floyd F. Director | 16,679 | $16.69 | 75,531 (Direct) | View |
| 2025-11-13 Exercise | 2025-11-17 4:16 pm | N/A 2026-06-07 | Amphastar Pharmaceuticals Inc. | AMPH | Petersen Floyd F. Director | 16,679 | $0 | 75,531 (Direct) | View |
| 2025-07-18 Option Award | 2025-07-22 4:23 pm | N/A 2035-07-18 | Amphastar Pharmaceuticals Inc. | AMPH | Gaugh David Russell Director | 20,291 | $0 | 20,291 (Direct) | View |
| 2025-06-13 Exercise | 2025-06-16 5:19 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & CHIEF SCIENTIFIC OFFICER 10% Owner | 200,000 | $13.03 | 11,065,816 (Direct) | View |
| 2025-06-13 Exercise | 2025-06-16 5:19 pm | N/A 2028-03-16 | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & CHIEF SCIENTIFIC OFFICER 10% Owner | 200,000 | $0 | 11,065,816 (Direct) | View |
| 2025-06-02 Option Award | 2025-06-04 8:04 pm | N/A 2035-06-02 | Amphastar Pharmaceuticals Inc. | AMPH | Lee Howard Director | 16,524 | $0 | 163,378 (Direct) | View |
| 2025-06-03 Tax Withholding | 2025-06-04 8:04 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Lee Howard Director | 923 | $26.01 | 163,378 (Direct) | View |
| 2025-06-02 Option Award | 2025-06-04 7:45 pm | N/A 2035-06-02 | Amphastar Pharmaceuticals Inc. | AMPH | Deflin Gayle Director | 16,524 | $0 | 22,316 (Direct) | View |