Amphastar Pharmaceuticals, Inc. insider transactions
Published Form 4 ownership transactions for AMPH.
| Date | Insider | Code | Shares | Price | Filing |
|---|---|---|---|---|---|
| 2026-07-09 | Pierce Anthony T | A / A | 7,886 | 0 | 4 |
| 2026-06-02 | Lee Howard | F / D | 769 | 18.45 | 4 |
| 2026-06-01 | Lee Howard | A / A | 8,143 | 0 | 4 |
| 2026-06-01 | Deflin Gayle | A / A | 8,143 | 0 | 4 |
| 2026-06-01 | PRINS RICHARD K | A / A | 8,143 | 0 | 4 |
| 2026-06-01 | ZASLOFF MICHAEL A | A / A | 8,143 | 0 | 4 |
| 2026-06-01 | Gaugh David Russell | A / A | 8,143 | 0 | 4 |
| 2026-06-01 | Gerst Diane G. | A / A | 8,143 | 0 | 4 |
| 2026-03-15 | Liawatidewi Yakob | F / D | 1,033 | 18.18 | 4 |
| 2026-03-15 | PETERS WILLIAM J | F / D | 1,973 | 18.18 | 4 |
| 2026-03-15 | Zhou Rong | F / D | 1,225 | 18.18 | 4 |
| 2026-03-15 | Zhang Jack Y. | F / D | 9,784 | 18.18 | 4 |
| 2026-03-15 | Zhang Jack Y. | F / D | 2,908 | 18.18 | 4 |
| 2026-03-10 | Zhang Jack Y. | F / D | 14,785 | 18.91 | 4 |
| 2026-03-10 | Zhang Jack Y. | F / D | 4,395 | 18.91 | 4 |
| 2026-03-10 | Zhou Rong | F / D | 2,215 | 18.91 | 4 |
| 2026-03-10 | PETERS WILLIAM J | F / D | 3,297 | 18.91 | 4 |
| 2026-03-10 | Liawatidewi Yakob | F / D | 1,870 | 18.91 | 4 |
| 2026-03-09 | PETERS WILLIAM J | A / A | 58,693 | 0 | 4 |
| 2026-03-09 | Liawatidewi Yakob | A / A | 35,450 | 0 | 4 |
| 2026-03-09 | Zhang Jack Y. | A / A | 180,504 | 0 | 4 |
| 2026-03-09 | Zhang Jack Y. | A / A | 72,462 | 0 | 4 |
| 2026-03-09 | Zhou Rong | A / A | 39,432 | 0 | 4 |
| 2026-03-06 | Zhang Jack Y. | F / D | 7,773 | 19.34 | 4 |
| 2026-03-06 | Zhang Jack Y. | F / D | 3,077 | 19.34 | 4 |
| 2026-03-06 | Zhou Rong | F / D | 1,357 | 19.34 | 4 |
| 2026-03-06 | PETERS WILLIAM J | F / D | 2,146 | 19.34 | 4 |
| 2026-03-06 | Liawatidewi Yakob | F / D | 1,144 | 19.34 | 4 |
| 2026-03-04 | Liawatidewi Yakob | F / D | 965 | 19.96 | 4 |
| 2026-03-04 | PETERS WILLIAM J | F / D | 1,744 | 19.96 | 4 |
| 2026-03-04 | Zhou Rong | F / D | 1,124 | 19.96 | 4 |
| 2026-03-04 | Zhang Jack Y. | F / D | 5,769 | 19.96 | 4 |
| 2026-03-04 | Zhang Jack Y. | F / D | 2,432 | 19.96 | 4 |
| 2025-12-17 | Zhou Rong | M / A | 9,787 | 11.33 | 4 |
| 2025-12-17 | Zhou Rong | S / D | 9,787 | 26.196 | 4 |
| 2025-12-12 | Petersen Floyd F. | S / D | 2,426 | 25.923 | 4 |
| 2025-12-11 | Petersen Floyd F. | S / D | 1,737 | 25.688 | 4 |
| 2025-11-25 | PRINS RICHARD K | S / D | 4,179 | 27.101 | 4 |
| 2025-11-25 | PRINS RICHARD K | M / A | 4,179 | 16.69 | 4 |
| 2025-11-13 | Petersen Floyd F. | M / A | 16,679 | 16.69 | 4 |
| 2025-11-13 | Petersen Floyd F. | S / D | 16,679 | 26.491 | 4 |
| 2025-11-03 | Petersen Floyd F. | S / D | 500 | 25.266 | 4 |
| 2025-10-01 | Petersen Floyd F. | S / D | 500 | 27.205 | 4 |
| 2025-09-02 | Petersen Floyd F. | S / D | 500 | 30.983 | 4 |
| 2025-08-01 | Petersen Floyd F. | S / D | 500 | 20.832 | 4 |
| 2024-08-19 | PRINS RICHARD K | G / D | 1,500 | 0 | 4 |