AMPH Amphastar Pharmaceuticals, Inc.
Nasdaq · SEC CIK 1297184 · EDGAR
- Bought, last 12 months
- $0 0 purchases by 0 insiders
- Sold, last 12 months
- $1.71M 11 sales by 4 insiders
- Filings on record
- 234 since 2021-07-08, latest 2026-09-23 18:02
BoughtSold
Most active insiders, 12 months
| Insider | Title | Bought | Sold |
|---|---|---|---|
| Petersen Floyd F. | Dir | — | $575.6K |
| Zhou Rong | SENIOR EVP, PRODUCTION CENTER | — | $571.1K |
| PETERS WILLIAM J | CFO, EVP, Treas, Dir | — | $287.4K |
| PRINS RICHARD K | Dir | — | $275.1K |
| Pierce Anthony T | Dir | — | — |
| Gaugh David Russell | Dir | — | — |
| Deflin Gayle | Dir | — | — |
| Liawatidewi Yakob | EVP CORP ADMIN CENTER, Dir | — | — |
| Gerst Diane G. | Dir | — | — |
| Zhang Jack Y. | CEO, CSO, Dir, 10% | — | — |
Transactions 354
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| T | 2026-09-23 18:02 | 2026-09-21 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | S - Sale | $25.00 | -4,139 | 168.7K | -2% | -$103.5K |
| D | 2026-09-17 18:19 | 2026-09-16 | AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | M - OptEx | $13.35 | +10.0K | 179.2K | +6% | +$133.5K |
| D | 2026-09-17 18:19 | 2026-09-16 | AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | S - Sale+OE | $23.94 | -10.0K | 169.2K | -6% | -$239.4K |
| 2026-09-03 19:42 | 2026-09-02 | AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | S - Sale | $23.63 | -3,187 | 169.2K | -2% | -$75.3K | |
| 2026-08-12 18:14 | 2026-08-11 | AMPH | PRINS RICHARD K | Dir | S - Sale | $20.30 | -7,973 | 29.6K | -21% | -$161.9K | |
| DT | 2026-08-11 16:57 | 2026-08-07 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | M - OptEx | $19.79 | +5,053 | 181.0K | +3% | +$100.0K |
| DT | 2026-08-11 16:57 | 2026-08-07 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | S - Sale+OE | $22.48 | -8,180 | 172.8K | -5% | -$183.9K |
| D | 2026-07-13 19:38 | 2026-07-09 | AMPH | Pierce Anthony T | Dir | A - Grant | $0.00 | +7,886 | 7,886 | New | $0 |
| D | 2026-06-03 21:22 | 2024-08-19 | AMPH | PRINS RICHARD K | Dir | G - Gift | $0.00 | -1,500 | 29.5K | -5% | $0 |
| D | 2026-06-03 21:22 | 2026-06-01 | AMPH | PRINS RICHARD K | Dir | A - Grant | $0.00 | +8,143 | 37.6K | +28% | $0 |
| D | 2026-06-03 21:20 | 2026-06-01 | AMPH | Lee Howard | Dir | A - Grant | $0.00 | +8,143 | 160.1K | +5% | $0 |
| D | 2026-06-03 21:20 | 2026-06-02 | AMPH | Lee Howard | Dir | F - Tax | $18.45 | -769 | 159.3K | -0.5% | -$14.2K |
| D | 2026-06-03 20:34 | 2026-06-01 | AMPH | ZASLOFF MICHAEL A | Dir | A - Grant | $0.00 | +8,143 | 37.7K | +28% | $0 |
| D | 2026-06-03 20:33 | 2026-06-01 | AMPH | Gerst Diane G. | Dir | A - Grant | $0.00 | +8,143 | 31.9K | +34% | $0 |
| D | 2026-06-03 20:31 | 2026-06-01 | AMPH | Gaugh David Russell | Dir | A - Grant | $0.00 | +8,143 | 14.4K | +129% | $0 |
| D | 2026-06-03 20:29 | 2026-06-01 | AMPH | Deflin Gayle | Dir | A - Grant | $0.00 | +8,143 | 19.1K | +75% | $0 |
| 2026-03-17 | 2026-03-15 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | F - Tax | $18.18 | -1,973 | 175.1K | -1% | -$35.9K | |
| 2026-03-17 | 2026-03-15 | AMPH | Liawatidewi Yakob | EVP CORP ADMIN CENTER, Dir | F - Tax | $18.18 | -1,033 | 121.9K | -0.8% | -$18.8K | |
| 2026-03-17 | 2026-03-15 | AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | F - Tax | $18.18 | -1,225 | 171.6K | -0.7% | -$22.3K | |
| 2026-03-17 | 2026-03-15 | AMPH | Zhang Jack Y. | CEO, CSO, Dir, 10% | F - Tax | $18.18 | -9,784 | 2.99M | -0.3% | -$177.9K | |
| I | 2026-03-17 | 2026-03-15 | AMPH | Zhang Jack Y. | CEO, CSO, Dir, 10% | F - Tax | $18.18 | -2,908 | 1.25M | -0.2% | -$52.9K |
| D | 2026-03-11 | 2026-03-09 | AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | A - Grant | $0.00 | +39.4K | 175.0K | +29% | $0 |
| D | 2026-03-11 | 2026-03-10 | AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | F - Tax | $18.91 | -2,215 | 172.8K | -1% | -$41.9K |
| D | 2026-03-11 | 2026-03-10 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | F - Tax | $18.91 | -3,297 | 177.0K | -2% | -$62.3K |
| D | 2026-03-11 | 2026-03-09 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | A - Grant | $0.00 | +58.7K | 180.3K | +48% | $0 |
| D | 2026-03-11 | 2026-03-10 | AMPH | Liawatidewi Yakob | EVP CORP ADMIN CENTER, Dir | F - Tax | $18.91 | -1,870 | 122.9K | -1% | -$35.4K |
| D | 2026-03-11 | 2026-03-09 | AMPH | Liawatidewi Yakob | EVP CORP ADMIN CENTER, Dir | A - Grant | $0.00 | +35.5K | 124.8K | +40% | $0 |
| D | 2026-03-11 | 2026-03-09 | AMPH | Zhang Jack Y. | CEO, CSO, Dir, 10% | A - Grant | $0.00 | +180.5K | 3.01M | +6% | $0 |
| DI | 2026-03-11 | 2026-03-10 | AMPH | Zhang Jack Y. | CEO, CSO, Dir, 10% | F - Tax | $18.91 | -4,395 | 1.25M | -0.4% | -$83.1K |
| DI | 2026-03-11 | 2026-03-09 | AMPH | Zhang Jack Y. | CEO, CSO, Dir, 10% | A - Grant | $0.00 | +72.5K | 1.25M | +6% | $0 |
| D | 2026-03-11 | 2026-03-10 | AMPH | Zhang Jack Y. | CEO, CSO, Dir, 10% | F - Tax | $18.91 | -14.8K | 3.00M | -0.5% | -$279.6K |
| 2026-03-10 | 2026-03-06 | AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | F - Tax | $19.34 | -1,357 | 135.6K | -1.0% | -$26.2K | |
| 2026-03-10 | 2026-03-06 | AMPH | Liawatidewi Yakob | EVP CORP ADMIN CENTER, Dir | F - Tax | $19.34 | -1,144 | 89.3K | -1% | -$22.1K | |
| 2026-03-10 | 2026-03-06 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | F - Tax | $19.34 | -2,146 | 121.6K | -2% | -$41.5K | |
| I | 2026-03-10 | 2026-03-06 | AMPH | Luo Mary Z. | COO, COB, Chief Scientist, Dir, 10% | F - Tax | $19.34 | -3,077 | 1.18M | -0.3% | -$59.5K |
| 2026-03-10 | 2026-03-06 | AMPH | Luo Mary Z. | COO, COB, Chief Scientist, Dir, 10% | F - Tax | $19.34 | -7,773 | 2.83M | -0.3% | -$150.3K | |
| 2026-03-06 | 2026-03-04 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | F - Tax | $19.96 | -1,744 | 123.8K | -1% | -$34.8K | |
| 2026-03-06 | 2026-03-04 | AMPH | Zhang Jack Y. | CEO, CSO, Dir, 10% | F - Tax | $19.96 | -5,769 | 2.84M | -0.2% | -$115.1K | |
| I | 2026-03-06 | 2026-03-04 | AMPH | Zhang Jack Y. | CEO, CSO, Dir, 10% | F - Tax | $19.96 | -2,432 | 1.18M | -0.2% | -$48.5K |
| 2026-03-06 | 2026-03-04 | AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | F - Tax | $19.96 | -1,124 | 136.9K | -0.8% | -$22.4K | |
| 2026-03-06 | 2026-03-04 | AMPH | Liawatidewi Yakob | EVP CORP ADMIN CENTER, Dir | F - Tax | $19.96 | -965 | 90.5K | -1% | -$19.3K | |
| D | 2025-12-18 | 2025-12-17 | AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | M - OptEx | $11.33 | +9,787 | 147.8K | +7% | +$110.9K |
| D | 2025-12-18 | 2025-12-17 | AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | S - Sale+OE | $26.20 | -9,787 | 138.0K | -7% | -$256.4K |
| M | 2025-12-15 | 2025-12-11+ | AMPH | Petersen Floyd F. | Dir | S - Sale | $25.82 | -4,163 | 71.4K | -6% | -$107.5K |
| D | 2025-11-25 | 2025-11-25 | AMPH | PRINS RICHARD K | Dir | S - Sale+OE | $27.10 | -4,179 | 35.2K | -11% | -$113.3K |
| D | 2025-11-25 | 2025-11-25 | AMPH | PRINS RICHARD K | Dir | M - OptEx | $16.69 | +4,179 | 39.4K | +12% | +$69.7K |
| D | 2025-11-17 | 2025-11-13 | AMPH | Petersen Floyd F. | Dir | S - Sale+OE | $26.49 | -16.7K | 75.5K | -18% | -$441.8K |
| D | 2025-11-17 | 2025-11-13 | AMPH | Petersen Floyd F. | Dir | M - OptEx | $16.69 | +16.7K | 92.2K | +22% | +$278.4K |
| 2025-11-05 | 2025-11-03 | AMPH | Petersen Floyd F. | Dir | S - Sale | $25.27 | -500 | 75.5K | -0.7% | -$12.6K | |
| 2025-10-02 | 2025-10-01 | AMPH | Petersen Floyd F. | Dir | S - Sale | $27.20 | -500 | 76.0K | -0.7% | -$13.6K | |
| 2025-09-03 | 2025-09-02 | AMPH | Petersen Floyd F. | Dir | S - Sale | $30.98 | -500 | 76.5K | -0.6% | -$15.5K | |
| 2025-08-04 | 2025-08-01 | AMPH | Petersen Floyd F. | Dir | S - Sale | $20.83 | -500 | 77.0K | -0.6% | -$10.4K | |
| D | 2025-07-22 | 2025-07-18 | AMPH | Gaugh David Russell | Dir | A - Grant | $0.00 | +6,304 | 6,304 | New | $0 |
| 2025-07-03 | 2025-07-02 | AMPH | Petersen Floyd F. | Dir | S - Sale | $23.47 | -500 | 77.5K | -0.6% | -$11.7K | |
| D | 2025-06-16 | 2025-06-13 | AMPH | Zhang Jack Y. | CEO, CSO, Dir, 10% | M - OptEx | $13.03 | +200.0K | 2.85M | +8% | +$2.61M |
| D | 2025-06-04 | 2025-06-02 | AMPH | Gerst Diane G. | Dir | A - Grant | $0.00 | +5,122 | 23.8K | +27% | $0 |
| D | 2025-06-04 | 2025-06-02 | AMPH | Petersen Floyd F. | Dir | A - Grant | $0.00 | +5,122 | 78.0K | +7% | $0 |
| D | 2025-06-04 | 2025-06-02 | AMPH | Petersen Floyd F. | Dir | S - Sale | $25.67 | -500 | 72.9K | -0.7% | -$12.8K |
| D | 2025-06-04 | 2025-06-02 | AMPH | Deflin Gayle | Dir | A - Grant | $0.00 | +5,122 | 10.9K | +88% | $0 |
| D | 2025-06-04 | 2025-06-03 | AMPH | Lee Howard | Dir | F - Tax | $26.01 | -923 | 152.0K | -0.6% | -$24.0K |
| D | 2025-06-04 | 2025-06-02 | AMPH | Lee Howard | Dir | A - Grant | $0.00 | +5,122 | 152.9K | +3% | $0 |
| D | 2025-06-04 | 2025-06-02 | AMPH | ZASLOFF MICHAEL A | Dir | A - Grant | $0.00 | +5,122 | 29.5K | +21% | $0 |
| D | 2025-06-04 | 2025-06-02 | AMPH | PRINS RICHARD K | Dir | A - Grant | $0.00 | +5,122 | 35.2K | +17% | $0 |
| 2025-05-20 | 2025-05-19 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | F - Tax | $24.79 | -273 | 125.0K | -0.2% | -$6,768 | |
| 2025-05-02 | 2025-05-01 | AMPH | Petersen Floyd F. | Dir | S - Sale | $24.08 | -500 | 73.4K | -0.7% | -$12.0K | |
| 2025-04-02 | 2025-04-01 | AMPH | Petersen Floyd F. | Dir | S - Sale | $28.38 | -500 | 73.9K | -0.7% | -$14.2K | |
| M | 2025-03-18 | 2025-03-15+ | AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | F - Tax | $27.30 | -3,189 | 139.5K | -2% | -$87.0K |
| D | 2025-03-18 | 2025-03-14 | AMPH | Zhang Jack Y. | CEO, CSO, Dir, 10% | M - OptEx | $14.69 | +290.5K | 2.90M | +11% | +$4.27M |
| DM | 2025-03-18 | 2025-03-14+ | AMPH | Zhang Jack Y. | CEO, CSO, Dir, 10% | F - Tax | $26.73 | -252.2K | 2.65M | -9% | -$6.74M |
| DMI | 2025-03-18 | 2025-03-14+ | AMPH | Zhang Jack Y. | CEO, CSO, Dir, 10% | F - Tax | $26.70 | -174.0K | 1.19M | -13% | -$4.65M |
| DI | 2025-03-18 | 2025-03-14 | AMPH | Zhang Jack Y. | CEO, CSO, Dir, 10% | M - OptEx | $14.69 | +211.2K | 1.36M | +18% | +$3.10M |
| M | 2025-03-18 | 2025-03-15+ | AMPH | Liawatidewi Yakob | EVP CORP ADMIN CENTER, Dir | F - Tax | $27.31 | -2,762 | 92.6K | -3% | -$75.4K |
| M | 2025-03-18 | 2025-03-15+ | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | F - Tax | $27.28 | -4,972 | 128.3K | -4% | -$135.6K |
| D | 2025-03-12 | 2025-03-10 | AMPH | Liawatidewi Yakob | EVP CORP ADMIN CENTER, Dir | A - Grant | $0.00 | +20.8K | 93.7K | +29% | $0 |
| D | 2025-03-12 | 2025-03-10 | AMPH | Zhang Jack Y. | CEO, CSO, Dir, 10% | A - Grant | $0.00 | +116.2K | 2.61M | +5% | $0 |
| DI | 2025-03-12 | 2025-03-10 | AMPH | Zhang Jack Y. | CEO, CSO, Dir, 10% | A - Grant | $0.00 | +49.0K | 1.15M | +4% | $0 |
| D | 2025-03-12 | 2025-03-10 | AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | A - Grant | $0.00 | +24.7K | 140.7K | +21% | $0 |
| D | 2025-03-12 | 2025-03-10 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | A - Grant | $0.00 | +36.7K | 130.2K | +39% | $0 |
| 2025-03-10 | 2025-03-06 | AMPH | Zhang Jack Y. | CEO, CSO, Dir, 10% | F - Tax | $28.32 | -9,645 | 2.49M | -0.4% | -$273.1K | |
| I | 2025-03-10 | 2025-03-06 | AMPH | Zhang Jack Y. | CEO, CSO, Dir, 10% | F - Tax | $28.32 | -3,069 | 1.10M | -0.3% | -$86.9K |
| 2025-03-10 | 2025-03-06 | AMPH | Liawatidewi Yakob | EVP CORP ADMIN CENTER, Dir | F - Tax | $28.32 | -1,141 | 72.8K | -2% | -$32.3K | |
| 2025-03-10 | 2025-03-06 | AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | F - Tax | $28.32 | -1,354 | 116.0K | -1% | -$38.3K | |
| 2025-03-10 | 2025-03-06 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | F - Tax | $28.32 | -2,141 | 93.5K | -2% | -$60.6K | |
| 2025-03-07 | 2025-03-06 | AMPH | Petersen Floyd F. | Dir | S - Sale | $27.99 | -1,000 | 74.4K | -1% | -$28.0K | |
| 2025-03-06 | 2025-03-04 | AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | F - Tax | $27.62 | -1,121 | 117.3K | -0.9% | -$31.0K | |
| I | 2025-03-06 | 2025-03-04 | AMPH | Luo Mary Z. | COO, COB, Chief Scientist, Dir, 10% | F - Tax | $27.62 | -2,426 | 1.10M | -0.2% | -$67.0K |
| 2025-03-06 | 2025-03-04 | AMPH | Luo Mary Z. | COO, COB, Chief Scientist, Dir, 10% | F - Tax | $27.62 | -5,753 | 2.50M | -0.2% | -$158.9K | |
| 2025-03-06 | 2025-03-04 | AMPH | Liawatidewi Yakob | EVP CORP ADMIN CENTER, Dir | F - Tax | $27.62 | -963 | 74.0K | -1% | -$26.6K | |
| D | 2025-03-06 | 2025-03-04 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | S - Sale+OE | $27.54 | -4,231 | 97.4K | -4% | -$116.5K |
| D | 2025-03-06 | 2025-03-04 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | F - Tax | $27.62 | -1,739 | 95.6K | -2% | -$48.0K |
| D | 2025-03-06 | 2025-03-04 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | M - OptEx | $13.35 | +7,490 | 101.6K | +8% | +$100.0K |
| DM | 2024-12-16 | 2024-12-12+ | AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | M - OptEx | $11.33 | +15.0K | 125.5K | +14% | +$169.9K |
| DM | 2024-12-16 | 2024-12-12+ | AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | S - Sale+OE | $44.86 | -15.0K | 118.5K | -11% | -$672.9K |
| D | 2024-12-11 | 2024-12-09 | AMPH | PRINS RICHARD K | Dir | M - OptEx | $19.52 | +10.0K | 40.5K | +33% | +$195.2K |
| D | 2024-12-11 | 2024-12-09 | AMPH | PRINS RICHARD K | Dir | G - Gift | $0.00 | -410 | 30.1K | -1% | $0 |
| D | 2024-12-11 | 2024-12-09 | AMPH | PRINS RICHARD K | Dir | S - Sale+OE | $43.77 | -10.0K | 30.5K | -25% | -$437.7K |
| D | 2024-11-13 | 2024-11-12 | AMPH | PRINS RICHARD K | Dir | S - Sale+OE | $48.80 | -5,000 | 31.5K | -14% | -$244.0K |
| D | 2024-11-13 | 2024-11-12 | AMPH | PRINS RICHARD K | Dir | G - Gift | $0.00 | -1,000 | 30.5K | -3% | $0 |
| D | 2024-11-13 | 2024-11-12 | AMPH | PRINS RICHARD K | Dir | M - OptEx | $16.69 | +2,500 | 36.5K | +7% | +$41.7K |
| D | 2024-11-13 | 2024-11-12 | AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | S - Sale+OE | $48.88 | -6,893 | 118.4K | -6% | -$336.9K |
Purchase Sale Sale after option exercise All abbreviations