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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2023-05-18 | 2023-05-17 | AMPH | Petersen Floyd F. | Dir | S - Sale | $43.13 | -5,000 | 80.1K | -6% | -$215.7K | |
| 2023-05-17 | 2023-05-15 | AMPH | Deflin Gayle | Dir | S - Sale | $43.15 | -1,500 | 8,682 | -15% | -$64.7K | |
| 2023-05-16 | 2023-05-15 | AMPH | ZASLOFF MICHAEL A | Dir | S - Sale | $42.18 | -7,500 | 43.9K | -15% | -$316.4K | |
| DM | 2023-05-16 | 2023-05-12+ | AMPH | PRINS RICHARD K | Dir | S - Sale+OE | $42.78 | -10.0K | 47.3K | -17% | -$427.8K |
| DM | 2023-05-16 | 2023-05-12+ | AMPH | PRINS RICHARD K | Dir | M - OptEx | $16.69 | +10.0K | 49.3K | +25% | +$166.9K |
| D | 2023-05-16 | 2023-05-12 | AMPH | PRINS RICHARD K | Dir | G - Gift | $0.00 | -3,000 | 44.3K | -6% | $0 |
| D | 2023-04-18 | 2023-04-17 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | S - Sale+OE | $42.35 | -5,632 | 105.1K | -5% | -$238.5K |
| D | 2023-04-18 | 2023-04-17 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | M - OptEx | $13.35 | +5,632 | 110.8K | +5% | +$75.2K |
| DM | 2023-04-14 | 2023-04-13 | AMPH | Liawatidewi Yakob | EVP Corp Admin Center, Dir | S - Sale+OE | $41.56 | -11.5K | 75.7K | -13% | -$477.7K |
| D | 2023-04-14 | 2023-04-13 | AMPH | Liawatidewi Yakob | EVP Corp Admin Center, Dir | M - OptEx | $20.23 | +11.5K | 80.7K | +17% | +$232.5K |
| D | 2023-04-14 | 2023-04-13 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | S - Sale+OE | $42.35 | -4,868 | 105.1K | -4% | -$206.2K |
| D | 2023-04-14 | 2023-04-13 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | M - OptEx | $13.35 | +4,868 | 110.0K | +5% | +$65.0K |
| D | 2023-04-12 | 2023-04-10 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | S - Sale+OE | $40.35 | -10.0K | 105.1K | -9% | -$404.8K |
| D | 2023-04-12 | 2023-04-10 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas, Dir | M - OptEx | $13.35 | +10.0K | 115.2K | +10% | +$133.9K |
| D | 2023-04-12 | 2023-04-10 | AMPH | Liawatidewi Yakob | EVP Corp Admin Center, Dir | S - Sale+OE | $40.00 | -5,000 | 69.2K | -7% | -$200.0K |
| D | 2023-04-12 | 2023-04-10 | AMPH | Liawatidewi Yakob | EVP Corp Admin Center, Dir | M - OptEx | $20.23 | +5,000 | 74.2K | +7% | +$101.2K |
| 2023-04-04 | 2023-04-03 | AMPH | Petersen Floyd F. | Dir | S - Sale | $37.72 | -491 | 85.1K | -0.6% | -$18.5K | |
| M | 2023-03-20 | 2023-03-16+ | AMPH | PETERS WILLIAM J | CFO, EVP, Treas | F - Tax | $37.00 | -9,157 | 109.3K | -8% | -$338.9K |
| M | 2023-03-20 | 2023-03-16+ | AMPH | Luo Mary Z. | COO, COB, Chief Scientist, Dir, 10% | F - Tax | $37.10 | -41.0K | 2.08M | -2% | -$1.52M |
| MI | 2023-03-20 | 2023-03-16 | AMPH | Luo Mary Z. | COO, COB, Chief Scientist, Dir, 10% | G - Gift | $0.00 | -114.7K | 0 | -100% | $0 |
| MI | 2023-03-20 | 2023-03-16+ | AMPH | Luo Mary Z. | COO, COB, Chief Scientist, Dir, 10% | F - Tax | $37.06 | -17.1K | 1.46M | -1% | -$631.8K |
| M | 2023-03-20 | 2023-03-16+ | AMPH | Zhou Rong | EVP, Production Center | F - Tax | $37.00 | -4,184 | 89.5K | -4% | -$154.8K |
| M | 2023-03-20 | 2023-03-16+ | AMPH | Liawatidewi Yakob | EVP Corp Admin Center | F - Tax | $36.93 | -3,293 | 70.9K | -4% | -$121.6K |
| 2023-03-17 | 2023-03-15 | AMPH | Luo Mary Z. | COO, COB, Chief Sci, Dir, 10% | F - Tax | $36.84 | -8,434 | 2.18M | -0.4% | -$310.7K | |
| I | 2023-03-17 | 2023-03-15 | AMPH | Luo Mary Z. | COO, COB, Chief Sci, Dir, 10% | F - Tax | $36.84 | -2,803 | 1.53M | -0.2% | -$103.3K |
| 2023-03-17 | 2023-03-15 | AMPH | Zhou Rong | EVP, Production Center | F - Tax | $36.84 | -2,057 | 91.8K | -2% | -$75.8K | |
| 2023-03-17 | 2023-03-15 | AMPH | Liawatidewi Yakob | EVP Corp Admin Center | F - Tax | $36.84 | -1,851 | 72.5K | -2% | -$68.2K | |
| D | 2023-03-17 | 2023-03-15 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas | M - OptEx | $14.95 | +6,688 | 131.2K | +5% | +$100.0K |
| D | 2023-03-17 | 2023-03-15 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas | F - Tax | $36.84 | -4,146 | 114.3K | -4% | -$152.7K |
| D | 2023-03-17 | 2023-03-15 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas | S - Sale+OE | $36.43 | -12.8K | 118.5K | -10% | -$465.4K |
| D | 2023-03-08 | 2023-03-06 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas | A - Grant | $0.00 | +23.9K | 124.5K | +24% | $0 |
| D | 2023-03-08 | 2023-03-06 | AMPH | Liawatidewi Yakob | EVP Corp Admin Center | A - Grant | $0.00 | +12.8K | 74.4K | +21% | $0 |
| D | 2023-03-08 | 2023-03-06 | AMPH | Zhou Rong | EVP, Production Center | A - Grant | $0.00 | +15.1K | 93.8K | +19% | $0 |
| D | 2023-03-08 | 2023-03-06 | AMPH | Zhang Jack Y. | CEO, CSO, Dir, 10% | A - Grant | $0.00 | +81.4K | 2.19M | +4% | $0 |
| DI | 2023-03-08 | 2023-03-06 | AMPH | Zhang Jack Y. | CEO, CSO, Dir, 10% | A - Grant | $0.00 | +34.3K | 1.53M | +2% | $0 |
| D | 2023-03-03 | 2023-03-01 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas | M - OptEx | $11.33 | +11.0K | 111.6K | +11% | +$124.3K |
| D | 2023-03-03 | 2023-03-01 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas | S - Sale+OE | $36.33 | -11.0K | 100.6K | -10% | -$398.7K |
| M | 2023-03-02 | 2023-03-01 | AMPH | Petersen Floyd F. | Dir | S - Sale | $36.70 | -500 | 85.7K | -0.6% | -$18.3K |
| 2023-02-02 | 2023-02-01 | AMPH | Petersen Floyd F. | Dir | S - Sale | $30.35 | -500 | 86.1K | -0.6% | -$15.2K | |
| 2023-01-04 | 2023-01-03 | AMPH | Petersen Floyd F. | Dir | S - Sale | $27.94 | -500 | 86.6K | -0.6% | -$14.0K | |
| 2022-12-02 | 2022-12-01 | AMPH | Petersen Floyd F. | Dir | S - Sale | $30.13 | -500 | 87.1K | -0.6% | -$15.1K | |
| 2022-11-02 | 2022-11-01 | AMPH | Petersen Floyd F. | Dir | S - Sale | $31.13 | -500 | 87.6K | -0.6% | -$15.6K | |
| 2022-10-04 | 2022-10-03 | AMPH | Petersen Floyd F. | Dir | S - Sale | $28.59 | -500 | 88.1K | -0.6% | -$14.3K | |
| 2022-09-02 | 2022-09-01 | AMPH | Petersen Floyd F. | Dir | S - Sale | $29.44 | -500 | 88.6K | -0.6% | -$14.7K | |
| D | 2022-08-10 | 2022-08-09 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas | S - Sale+OE | $38.35 | -10.0K | 100.5K | -9% | -$383.5K |
| D | 2022-08-10 | 2022-08-09 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas | M - OptEx | $13.35 | +10.0K | 110.5K | +10% | +$133.5K |
| DM | 2022-08-10 | 2022-08-08+ | AMPH | Liawatidewi Yakob | EVP Corp Admin Center | S - Sale+OE | $38.38 | -8,055 | 61.6K | -12% | -$309.1K |
| DM | 2022-08-10 | 2022-08-08+ | AMPH | Liawatidewi Yakob | EVP Corp Admin Center | M - OptEx | $19.79 | +8,055 | 64.7K | +14% | +$159.4K |
| 2022-08-02 | 2022-08-01 | AMPH | Petersen Floyd F. | Dir | S - Sale | $37.48 | -500 | 89.1K | -0.6% | -$18.7K | |
| D | 2022-07-19 | 2022-07-18 | AMPH | Gerst Diane G. | Dir | S - Sale+OE | $37.23 | -1,520 | 12.8K | -11% | -$56.6K |
| D | 2022-07-19 | 2022-07-18 | AMPH | Gerst Diane G. | Dir | M - OptEx | $20.08 | +1,520 | 14.4K | +12% | +$30.5K |
| D | 2022-07-18 | 2022-07-15 | AMPH | Liawatidewi Yakob | EVP Corp Admin Center | M - OptEx | $19.79 | +10.8K | 72.4K | +18% | +$214.5K |
| DM | 2022-07-18 | 2022-07-15 | AMPH | Liawatidewi Yakob | EVP Corp Admin Center | S - Sale+OE | $36.64 | -10.8K | 69.0K | -14% | -$397.1K |
| D | 2022-07-12 | 2022-07-11 | AMPH | Gerst Diane G. | Dir | S - Sale+OE | $36.26 | -1,521 | 12.8K | -11% | -$55.2K |
| D | 2022-07-12 | 2022-07-11 | AMPH | Gerst Diane G. | Dir | M - OptEx | $20.08 | +1,521 | 14.4K | +12% | +$30.5K |
| D | 2022-07-06 | 2022-07-05 | AMPH | Gerst Diane G. | Dir | S - Sale+OE | $35.00 | -1,813 | 12.8K | -12% | -$63.5K |
| D | 2022-07-06 | 2022-07-05 | AMPH | Gerst Diane G. | Dir | M - OptEx | $20.08 | +1,813 | 14.7K | +14% | +$36.4K |
| D | 2022-07-05 | 2022-06-30 | AMPH | Gerst Diane G. | Dir | S - Sale+OE | $35.00 | -5,146 | 12.8K | -29% | -$180.1K |
| DM | 2022-07-05 | 2022-06-30 | AMPH | Gerst Diane G. | Dir | M - OptEx | $20.05 | +5,146 | 16.2K | +47% | +$103.2K |
| 2022-07-05 | 2022-07-01 | AMPH | Petersen Floyd F. | Dir | S - Sale | $34.78 | -500 | 89.6K | -0.6% | -$17.4K | |
| D | 2022-07-01 | 2022-06-30 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas | S - Sale+OE | $34.95 | -18.4K | 100.5K | -15% | -$642.6K |
| D | 2022-07-01 | 2022-06-30 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas | M - OptEx | $14.95 | +18.4K | 118.9K | +18% | +$274.9K |
| 2022-06-22 | 2022-06-17 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas | S - Sale | $32.05 | -5,512 | 100.5K | -5% | -$176.7K | |
| 2022-06-15 | 2022-06-14 | AMPH | Liawatidewi Yakob | EVP Corp Admin Center | F - Tax | $31.02 | -128 | 61.6K | -0.2% | -$3,971 | |
| D | 2022-06-14 | 2022-05-17 | AMPH | PRINS RICHARD K | Dir | G - Gift | $0.00 | -2,000 | 43.2K | -4% | $0 |
| D | 2022-06-14 | 2022-06-10 | AMPH | PRINS RICHARD K | Dir | A - Grant | $0.00 | +4,163 | 47.3K | +10% | $0 |
| D | 2022-06-14 | 2022-06-10 | AMPH | Lee Howard | Dir | A - Grant | $0.00 | +4,163 | 142.9K | +3% | $0 |
| D | 2022-06-14 | 2022-06-10 | AMPH | ZASLOFF MICHAEL A | Dir | A - Grant | $0.00 | +4,163 | 51.4K | +9% | $0 |
| D | 2022-06-14 | 2022-06-10 | AMPH | Deflin Gayle | Dir | A - Grant | $0.00 | +4,163 | 10.2K | +69% | $0 |
| D | 2022-06-14 | 2022-06-10 | AMPH | Gerst Diane G. | Dir | A - Grant | $0.00 | +4,163 | 12.8K | +48% | $0 |
| D | 2022-06-14 | 2022-06-10 | AMPH | Petersen Floyd F. | Dir | A - Grant | $0.00 | +4,163 | 90.1K | +5% | $0 |
| D | 2022-06-07 | 2022-06-06 | AMPH | Lee Howard | Dir | S - Sale+OE | $37.79 | -10.3K | 138.8K | -7% | -$388.9K |
| D | 2022-06-07 | 2022-06-06 | AMPH | Lee Howard | Dir | M - OptEx | $17.11 | +10.3K | 149.1K | +7% | +$176.1K |
| 2022-06-06 | 2022-06-04 | AMPH | Liawatidewi Yakob | EVP Corp Admin Center | F - Tax | $37.77 | -264 | 61.7K | -0.4% | -$9,971 | |
| M | 2022-06-02 | 2022-06-01 | AMPH | Petersen Floyd F. | Dir | S - Sale | $37.00 | -500 | 86.1K | -0.6% | -$18.5K |
| D | 2022-05-25 | 2022-05-23 | AMPH | Lee Howard | Dir | M - OptEx | $17.11 | +10.0K | 148.8K | +7% | +$171.1K |
| D | 2022-05-25 | 2022-05-23 | AMPH | Lee Howard | Dir | S - Sale+OE | $34.93 | -10.0K | 138.8K | -7% | -$349.3K |
| 2022-05-23 | 2022-05-20 | AMPH | Zhang Jack Y. | CEO, CSO, Dir, 10% | S - Sale | $34.21 | -10.7K | 2.10M | -0.5% | -$364.3K | |
| M | 2022-05-20 | 2022-05-18+ | AMPH | Luo Mary Z. | CEO, CSO, Dir, 10% | S - Sale | $34.00 | -108.8K | 2.11M | -5% | -$3.70M |
| 2022-05-20 | 2022-05-19 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas | F - Tax | $33.70 | -378 | 104.6K | -0.4% | -$12.7K | |
| D | 2022-05-19 | 2022-05-18 | AMPH | Petersen Floyd F. | Dir | M - OptEx | $17.11 | +20.3K | 96.4K | +27% | +$347.2K |
| D | 2022-05-19 | 2022-05-18 | AMPH | Petersen Floyd F. | Dir | S - Sale+OE | $35.05 | -9,924 | 86.4K | -10% | -$347.8K |
| M | 2022-05-18 | 2022-05-16+ | AMPH | Luo Mary Z. | CEO, CSO, Dir, 10% | S - Sale | $35.75 | -118.4K | 2.29M | -5% | -$4.23M |
| D | 2022-05-17 | 2022-05-16 | AMPH | ZASLOFF MICHAEL A | Dir | M - OptEx | $17.11 | +10.3K | 57.5K | +22% | +$176.1K |
| D | 2022-05-17 | 2022-05-16 | AMPH | ZASLOFF MICHAEL A | Dir | S - Sale+OE | $35.61 | -10.3K | 47.2K | -18% | -$366.5K |
| M | 2022-05-03 | 2022-05-02 | AMPH | Petersen Floyd F. | Dir | S - Sale | $35.18 | -295 | 76.1K | -0.4% | -$10.4K |
| M | 2022-04-04 | 2022-04-01 | AMPH | Petersen Floyd F. | Dir | S - Sale | $36.69 | -500 | 76.4K | -0.6% | -$18.3K |
| M | 2022-03-18 | 2022-03-16+ | AMPH | Zhou Rong | EVP, Production Center | F - Tax | $34.20 | -4,730 | 77.6K | -6% | -$161.8K |
| M | 2022-03-18 | 2022-03-16+ | AMPH | Liawatidewi Yakob | EVP Corp Admin Center | F - Tax | $34.20 | -3,292 | 62.4K | -5% | -$112.6K |
| D | 2022-03-18 | 2022-03-16 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas | M - OptEx | $14.40 | +50.8K | 164.9K | +44% | +$731.2K |
| DM | 2022-03-18 | 2022-03-16 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas | S - Sale+OE | $33.96 | -50.8K | 114.1K | -31% | -$1.72M |
| DM | 2022-03-18 | 2022-03-16+ | AMPH | PETERS WILLIAM J | CFO, EVP, Treas | F - Tax | $34.20 | -9,157 | 109.1K | -8% | -$313.2K |
| MI | 2022-03-18 | 2022-03-16+ | AMPH | Zhang Jack Y. | CEO, CSO, Dir, 10% | F - Tax | $34.20 | -17.5K | 1.51M | -1% | -$597.8K |
| M | 2022-03-18 | 2022-03-16+ | AMPH | Zhang Jack Y. | CEO, CSO, Dir, 10% | F - Tax | $34.20 | -41.0K | 2.36M | -2% | -$1.40M |
| D | 2022-03-17 | 2022-03-15 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas | A - Grant | $0.00 | +22.0K | 120.1K | +22% | $0 |
| D | 2022-03-17 | 2022-03-15 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas | S - Sale | $34.46 | -7,900 | 98.1K | -7% | -$272.2K |
| D | 2022-03-17 | 2022-03-15 | AMPH | PETERS WILLIAM J | CFO, EVP, Treas | F - Tax | $34.74 | -5,989 | 114.1K | -5% | -$208.1K |
| D | 2022-03-17 | 2022-03-16 | AMPH | ZASLOFF MICHAEL A | Dir | M - OptEx | $17.11 | +10.0K | 57.2K | +21% | +$171.1K |
| D | 2022-03-17 | 2022-03-16 | AMPH | ZASLOFF MICHAEL A | Dir | S - Sale+OE | $33.71 | -10.0K | 47.2K | -17% | -$337.1K |
| D | 2022-03-17 | 2022-03-15 | AMPH | Zhou Rong | EVP, Production Center | F - Tax | $34.74 | -1,652 | 82.3K | -2% | -$57.4K |
Purchase Sale Sale after option exercise All abbreviations