PETERS WILLIAM J
SEC CIK 1263136 · EDGAR
BoughtSold
Companies
| Ticker | Company | Title | Holding | Bought | Sold | Trades | First | Last |
|---|---|---|---|---|---|---|---|---|
| AMPH | Amphastar Pharmaceuticals, Inc. | CFO, EVP, Treas, Dir | 168.7K | — | $19.93M | 81 | 2021-07-07 | 2026-09-21 |
Most active insiders at AMPH, 12 months
| # | Insider | Title | Bought | Sold |
|---|---|---|---|---|
| 1 | Petersen Floyd F. | Dir | — | $575.6K |
| 2 | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | — | $571.1K |
| 3 | PETERS WILLIAM J | CFO, EVP, Treas, Dir | — | $287.4K |
| 4 | PRINS RICHARD K | Dir | — | $275.1K |
| 5 | Pierce Anthony T | Dir | — | — |
| 6 | Gaugh David Russell | Dir | — | — |
| 7 | Deflin Gayle | Dir | — | — |
| 8 | Liawatidewi Yakob | EVP CORP ADMIN CENTER, Dir | — | — |
| 9 | Gerst Diane G. | Dir | — | — |
| 10 | Zhang Jack Y. | CEO, CSO, Dir, 10% | — | — |
Transactions 81
| X | Filed | Traded | Ticker | Company | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| T | 2026-09-23 18:02 | 2026-09-21 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | S - Sale | $25.00 | -4,139 | 168.7K | -2% | -$103.5K |
| DT | 2026-08-11 16:57 | 2026-08-07 | AMPH | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | S - Sale+OE | $22.48 | -8,180 | 172.8K | -5% | -$183.9K |
| 2026-03-17 | 2026-03-15 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | F - Tax | $18.18 | -1,973 | 175.1K | -1% | -$35.9K | |
| D | 2026-03-11 | 2026-03-10 | AMPH | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | A - Grant | $0.00 | +58.7K | 180.3K | +48% | $0 |
| 2026-03-10 | 2026-03-06 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | F - Tax | $19.34 | -2,146 | 121.6K | -2% | -$41.5K | |
| 2026-03-06 | 2026-03-04 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | F - Tax | $19.96 | -1,744 | 123.8K | -1% | -$34.8K | |
| 2025-05-20 | 2025-05-19 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | F - Tax | $24.79 | -273 | 125.0K | -0.2% | -$6,768 | |
| M | 2025-03-18 | 2025-03-15+ | AMPH | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | A - Grant | $0.00 | +36.7K | 130.2K | +39% | $0 |
| 2025-03-10 | 2025-03-06 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | F - Tax | $28.32 | -2,141 | 93.5K | -2% | -$60.6K | |
| D | 2025-03-06 | 2025-03-04 | AMPH | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | M - OptEx | $13.35 | +7,490 | 101.6K | +8% | +$100.0K |
| D | 2024-11-08 | 2024-11-06 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | M - OptEx | $13.03 | +7,426 | 101.5K | +8% | +$96.8K |
| D | 2024-11-08 | 2024-11-06 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | S - Sale+OE | $52.05 | -7,426 | 94.1K | -7% | -$386.5K |
| D | 2024-08-02 | 2024-07-31 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | S - Sale+OE | $44.23 | -10.3K | 94.1K | -10% | -$454.8K |
| D | 2024-08-02 | 2024-07-31 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | M - OptEx | $20.23 | +10.3K | 104.4K | +11% | +$208.0K |
| M | 2024-06-28 | 2024-06-27 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | S - Sale | $40.93 | -3,596 | 94.7K | -4% | -$147.2K |
| 2024-05-21 | 2024-05-19 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | F - Tax | $43.48 | -387 | 97.3K | -0.4% | -$16.8K | |
| M | 2024-03-19 | 2024-03-15+ | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | F - Tax | $43.05 | -11.6K | 107.0K | -10% | -$501.3K |
| DM | 2024-03-08 | 2024-03-06 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | S - Sale+OE | $46.48 | -18.1K | 111.5K | -14% | -$843.0K |
| D | 2024-03-08 | 2024-03-06 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | F - Tax | $46.31 | -2,190 | 109.3K | -2% | -$101.4K |
| D | 2024-03-08 | 2024-03-06 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | M - OptEx | $11.33 | +8,826 | 129.6K | +7% | +$100.0K |
| D | 2024-03-06 | 2024-03-04 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | A - Grant | $0.00 | +19.4K | 120.8K | +19% | $0 |
| DM | 2023-11-16 | 2023-11-14 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | S - Sale+OE | $55.67 | -59.2K | 116.2K | -34% | -$3.30M |
| DM | 2023-11-16 | 2023-11-14 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | M - OptEx | $15.61 | +59.2K | 122.6K | +94% | +$925.0K |
| DM | 2023-09-08 | 2023-09-06 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | M - OptEx | $16.93 | +56.5K | 162.1K | +54% | +$956.8K |
| DM | 2023-09-08 | 2023-09-06 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | S - Sale+OE | $51.75 | -60.7K | 101.4K | -37% | -$3.14M |
| DM | 2023-06-20 | 2023-06-15 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | S - Sale+OE | $50.85 | -36.9K | 130.6K | -22% | -$1.87M |
| D | 2023-06-20 | 2023-06-15 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | M - OptEx | $19.79 | +36.9K | 142.5K | +35% | +$729.6K |
| D | 2023-06-05 | 2023-06-02 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | M - OptEx | $13.35 | +11.0K | 116.6K | +10% | +$146.8K |
| D | 2023-06-05 | 2023-06-02 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | S - Sale+OE | $46.35 | -11.0K | 105.6K | -9% | -$509.9K |
| D | 2023-05-22 | 2023-05-18 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | S - Sale+OE | $44.35 | -10.5K | 105.1K | -9% | -$465.7K |
| D | 2023-05-22 | 2023-05-19 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | F - Tax | $44.16 | -378 | 104.8K | -0.4% | -$16.7K |
| D | 2023-05-22 | 2023-05-18 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | M - OptEx | $13.35 | +10.5K | 115.6K | +10% | +$140.2K |
| D | 2023-04-18 | 2023-04-17 | AMPH | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | M - OptEx | $13.35 | +5,632 | 110.8K | +5% | +$75.2K |
| D | 2023-04-14 | 2023-04-13 | AMPH | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas, Dir | M - OptEx | $13.35 | +10.0K | 115.2K | +10% | +$133.9K |
| M | 2023-03-20 | 2023-03-16+ | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | F - Tax | $37.00 | -9,157 | 109.3K | -8% | -$338.9K |
| D | 2023-03-17 | 2023-03-15 | AMPH | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | A - Grant | $0.00 | +23.9K | 124.5K | +24% | $0 |
| D | 2023-03-03 | 2023-03-01 | AMPH | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | S - Sale+OE | $36.33 | -11.0K | 100.6K | -10% | -$398.7K |
| D | 2022-08-10 | 2022-08-09 | AMPH | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | M - OptEx | $13.35 | +10.0K | 110.5K | +10% | +$133.5K |
| D | 2022-07-01 | 2022-06-30 | AMPH | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | M - OptEx | $14.95 | +18.4K | 118.9K | +18% | +$274.9K |
| 2022-06-22 | 2022-06-17 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | S - Sale | $32.05 | -5,512 | 100.5K | -5% | -$176.7K | |
| 2022-05-20 | 2022-05-19 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | F - Tax | $33.70 | -378 | 104.6K | -0.4% | -$12.7K | |
| D | 2022-03-18 | 2022-03-16 | AMPH | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | F - Tax | $34.20 | -9,157 | 109.1K | -8% | -$313.2K |
| D | 2022-03-17 | 2022-03-15 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | A - Grant | $0.00 | +22.0K | 120.1K | +22% | $0 |
| D | 2022-03-17 | 2022-03-15 | AMPH | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | F - Tax | $34.74 | -5,989 | 114.1K | -5% | -$208.1K |
| D | 2022-03-09 | 2022-03-07 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | M - OptEx | $13.35 | +13.0K | 119.1K | +12% | +$173.9K |
| D | 2022-03-09 | 2022-03-07 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | S - Sale+OE | $29.35 | -13.0K | 106.0K | -11% | -$382.3K |
| DM | 2022-03-01 | 2022-02-25 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | S - Sale+OE | $28.47 | -23.0K | 118.0K | -16% | -$654.9K |
| D | 2022-03-01 | 2022-02-25 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | M - OptEx | $14.95 | +23.0K | 129.0K | +22% | +$343.9K |
| D | 2022-02-09 | 2022-02-08 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | M - OptEx | $14.95 | +10.0K | 116.0K | +9% | +$149.5K |
| D | 2022-02-09 | 2022-02-08 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | S - Sale+OE | $26.95 | -10.0K | 106.0K | -9% | -$269.5K |
| DM | 2022-01-11 | 2022-01-07+ | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | S - Sale+OE | $24.75 | -47.8K | 106.0K | -31% | -$1.18M |
| DM | 2022-01-11 | 2022-01-07+ | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | M - OptEx | $14.40 | +47.8K | 137.8K | +53% | +$688.0K |
| D | 2022-01-04 | 2021-12-30 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | M - OptEx | $14.40 | +10.0K | 116.0K | +9% | +$144.0K |
| D | 2022-01-04 | 2021-12-30 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | S - Sale+OE | $23.40 | -10.0K | 106.0K | -9% | -$234.0K |
| D | 2021-12-22 | 2021-12-21 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | S - Sale+OE | $22.40 | -8,256 | 106.0K | -7% | -$184.9K |
| D | 2021-12-22 | 2021-12-21 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | M - OptEx | $14.40 | +8,256 | 114.3K | +8% | +$118.9K |
| D | 2021-12-17 | 2021-12-16 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | M - OptEx | $14.40 | +1,744 | 107.8K | +2% | +$25.1K |
| D | 2021-12-17 | 2021-12-16 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | S - Sale+OE | $22.40 | -1,744 | 106.0K | -2% | -$39.1K |
| D | 2021-11-12 | 2021-11-11 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | S - Sale+OE | $21.33 | -10.0K | 105.7K | -9% | -$213.3K |
| D | 2021-11-12 | 2021-11-11 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | M - OptEx | $11.33 | +10.0K | 115.7K | +9% | +$113.3K |
| 2021-08-17 | 2021-08-16 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | S - Sale | $19.35 | -6,589 | 105.7K | -6% | -$127.5K | |
| D | 2021-07-08 | 2021-07-07 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | M - OptEx | $11.33 | +10.0K | 122.3K | +9% | +$113.3K |
| D | 2021-07-08 | 2021-07-07 | AMPH | Amphastar Pharmaceuticals, Inc. | PETERS WILLIAM J | CFO, EVP, Treas | S - Sale+OE | $20.37 | -10.0K | 112.3K | -8% | -$203.7K |
Purchase Sale Sale after option exercise All abbreviations