Gerst Diane G.
SEC CIK 1611283 · EDGAR
BoughtSold
Companies
| Ticker | Company | Title | Holding | Bought | Sold | Trades | First | Last |
|---|---|---|---|---|---|---|---|---|
| AMPH | Amphastar Pharmaceuticals, Inc. | Dir | 31.9K | — | $355.3K | 13 | 2022-06-10 | 2026-06-01 |
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 13
| X | Filed | Traded | Ticker | Company | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2026-06-03 20:33 | 2026-06-01 | AMPH | Amphastar Pharmaceuticals, Inc. | Gerst Diane G. | Dir | A - Grant | $0.00 | +8,143 | 31.9K | +34% | $0 |
| D | 2025-06-04 | 2025-06-02 | AMPH | Amphastar Pharmaceuticals, Inc. | Gerst Diane G. | Dir | A - Grant | $0.00 | +5,122 | 23.8K | +27% | $0 |
| D | 2024-06-05 | 2024-06-03 | AMPH | Amphastar Pharmaceuticals, Inc. | Gerst Diane G. | Dir | A - Grant | $0.00 | +3,076 | 18.6K | +20% | $0 |
| D | 2023-06-07 | 2023-06-05 | AMPH | Amphastar Pharmaceuticals, Inc. | Gerst Diane G. | Dir | A - Grant | $0.00 | +2,716 | 15.6K | +21% | $0 |
| D | 2022-07-19 | 2022-07-18 | AMPH | Amphastar Pharmaceuticals, Inc. | Gerst Diane G. | Dir | S - Sale+OE | $37.23 | -1,520 | 12.8K | -11% | -$56.6K |
| D | 2022-07-19 | 2022-07-18 | AMPH | Amphastar Pharmaceuticals, Inc. | Gerst Diane G. | Dir | M - OptEx | $20.08 | +1,520 | 14.4K | +12% | +$30.5K |
| D | 2022-07-12 | 2022-07-11 | AMPH | Amphastar Pharmaceuticals, Inc. | Gerst Diane G. | Dir | S - Sale+OE | $36.26 | -1,521 | 12.8K | -11% | -$55.2K |
| D | 2022-07-12 | 2022-07-11 | AMPH | Amphastar Pharmaceuticals, Inc. | Gerst Diane G. | Dir | M - OptEx | $20.08 | +1,521 | 14.4K | +12% | +$30.5K |
| D | 2022-07-06 | 2022-07-05 | AMPH | Amphastar Pharmaceuticals, Inc. | Gerst Diane G. | Dir | S - Sale+OE | $35.00 | -1,813 | 12.8K | -12% | -$63.5K |
| D | 2022-07-06 | 2022-07-05 | AMPH | Amphastar Pharmaceuticals, Inc. | Gerst Diane G. | Dir | M - OptEx | $20.08 | +1,813 | 14.7K | +14% | +$36.4K |
| D | 2022-07-05 | 2022-06-30 | AMPH | Amphastar Pharmaceuticals, Inc. | Gerst Diane G. | Dir | S - Sale+OE | $35.00 | -5,146 | 12.8K | -29% | -$180.1K |
| DM | 2022-07-05 | 2022-06-30 | AMPH | Amphastar Pharmaceuticals, Inc. | Gerst Diane G. | Dir | M - OptEx | $20.05 | +5,146 | 16.2K | +47% | +$103.2K |
| D | 2022-06-14 | 2022-06-10 | AMPH | Amphastar Pharmaceuticals, Inc. | Gerst Diane G. | Dir | A - Grant | $0.00 | +4,163 | 12.8K | +48% | $0 |
Purchase Sale Sale after option exercise All abbreviations