Zhang Jack Y.
SEC CIK 1611157 · EDGAR
BoughtSold
Companies
| Ticker | Company | Title | Holding | Bought | Sold | Trades | First | Last |
|---|---|---|---|---|---|---|---|---|
| AMPH | Amphastar Pharmaceuticals, Inc. | CEO, CSO, Dir, 10% | 2.99M | — | $7.54M | 27 | 2022-03-16 | 2026-03-15 |
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 27
| X | Filed | Traded | Ticker | Company | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-03-17 | 2026-03-15 | AMPH | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | Zhang Jack Y. | CEO, CSO, Dir, 10% | F - Tax | $18.91 | -14.8K | 3.00M | -0.5% | -$279.6K |
| 2026-03-06 | 2026-03-04 | AMPH | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | Zhang Jack Y. | CEO, CSO, Dir, 10% | F - Tax | $19.96 | -2,432 | 1.18M | -0.2% | -$48.5K |
| D | 2025-06-16 | 2025-06-13 | AMPH | Amphastar Pharmaceuticals, Inc. | Zhang Jack Y. | CEO, CSO, Dir, 10% | M - OptEx | $13.03 | +200.0K | 2.85M | +8% | +$2.61M |
| D | 2025-03-18 | 2025-03-14 | AMPH | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | Zhang Jack Y. | CEO, CSO, Dir, 10% | M - OptEx | $14.69 | +211.2K | 1.36M | +18% | +$3.10M |
| D | 2025-03-12 | 2025-03-10 | AMPH | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | Zhang Jack Y. | CEO, CSO, Dir, 10% | A - Grant | $0.00 | +49.0K | 1.15M | +4% | $0 |
| 2025-03-10 | 2025-03-06 | AMPH | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | Zhang Jack Y. | CEO, CSO, Dir, 10% | F - Tax | $28.32 | -3,069 | 1.10M | -0.3% | -$86.9K |
| D | 2024-09-16 | 2024-09-13 | AMPH | Amphastar Pharmaceuticals, Inc. | Zhang Jack Y. | CEO, CSO, Dir, 10% | M - OptEx | $14.69 | +100.0K | 2.63M | +4% | +$1.47M |
| D | 2024-06-11 | 2024-06-10 | AMPH | Amphastar Pharmaceuticals, Inc. | Zhang Jack Y. | CEO, CSO, Dir, 10% | M - OptEx | $14.69 | +100.0K | 2.53M | +4% | +$1.47M |
| DI | 2024-03-06 | 2024-03-04 | AMPH | Amphastar Pharmaceuticals, Inc. | Zhang Jack Y. | CEO, CSO, Dir, 10% | A - Grant | $0.00 | +27.1K | 1.13M | +2% | $0 |
| D | 2024-03-06 | 2024-03-04 | AMPH | Amphastar Pharmaceuticals, Inc. | Zhang Jack Y. | CEO, CSO, Dir, 10% | A - Grant | $0.00 | +64.3K | 2.14M | +3% | $0 |
| M | 2024-01-11 | 2024-01-10 | AMPH | Amphastar Pharmaceuticals, Inc. | Zhang Jack Y. | CEO, CSO, Dir, 10% | S - Sale | $54.59 | -131.4K | 1.11M | -11% | -$7.17M |
| D | 2023-03-08 | 2023-03-06 | AMPH | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | Zhang Jack Y. | CEO, CSO, Dir, 10% | A - Grant | $0.00 | +34.3K | 1.53M | +2% | $0 |
| 2022-05-23 | 2022-05-20 | AMPH | Amphastar Pharmaceuticals, Inc. | Zhang Jack Y. | CEO, CSO, Dir, 10% | S - Sale | $34.21 | -10.7K | 2.10M | -0.5% | -$364.3K | |
| MI | 2022-03-18 | 2022-03-16+ | AMPH | Amphastar Pharmaceuticals, Inc. | 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 | Amphastar Pharmaceuticals, Inc. | Zhang Jack Y. | CEO, CSO, Dir, 10% | F - Tax | $34.20 | -41.0K | 2.36M | -2% | -$1.40M |
Purchase Sale Sale after option exercise All abbreviations