Real time Form 13D and 13G transaction reports:
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Due to inconsistent filing format, it is highly recommended that you read the orignal filing form.
- Shares have beem adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>
| Reported DateTime | Transaction Date | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | View |
| 2026-03-26 3:46 pm Sale | 2026-03-13 | 13G | AMPHASTAR PHARMACEUTICALS INC AMPH | VANGUARD GROUP INC | 0 0.000% | -2,814,710 (Position Closed) | Filing History |
| 2025-10-17 4:05 pm Sale | 2025-09-30 | 13G | AMPHASTAR PHARMACEUTICALS INC AMPH | BlackRock Inc. BLK | 5,333,463 11.500% | -703,695 (-11.66%) | Filing History |
| 2025-02-07 7:21 pm Sale | 2024-12-31 | 13G | AMPHASTAR PHARMACEUTICALS INC AMPH | Zhang Jack Y. | 12,524,153 24.800% | -911,057 (-6.78%) | Filing History |
| 2024-03-06 10:23 am Sale | 2024-02-29 | 13G | AMPHASTAR PHARMACEUTICALS INC AMPH | FEDERATED HERMES INC. FHI | 2,165,071 4.520% | -1,107,690 (-33.85%) | Filing History |
| 2024-02-13 4:58 pm Purchase | 2023-12-29 | 13G | AMPHASTAR PHARMACEUTICALS INC AMPH | VANGUARD GROUP INC | 2,814,710 5.880% | 192,903 (+7.36%) | Filing History |
| 2024-02-09 5:21 pm Purchase | 2023-12-31 | 13G | AMPHASTAR PHARMACEUTICALS INC AMPH | Zhang Jack Y. | 13,435,210 26.200% | 324,515 (+2.48%) | Filing History |
| 2024-01-23 11:53 am Sale | 2023-12-31 | 13G | AMPHASTAR PHARMACEUTICALS INC AMPH | BlackRock Inc. BLK | 6,037,158 12.600% | -1,001,611 (-14.23%) | Filing History |
| 2024-01-17 2:36 pm Sale | 2023-12-31 | 13G | AMPHASTAR PHARMACEUTICALS INC AMPH | FEDERATED HERMES INC. FHI | 3,272,761 6.830% | -11,456 (-0.35%) | Filing History |
| 2023-02-09 11:07 am Purchase | 2022-12-30 | 13G | AMPHASTAR PHARMACEUTICALS INC AMPH | VANGUARD GROUP INC | 2,621,807 5.420% | 153,696 (+6.23%) | Filing History |
| 2023-02-01 09:43 am Sale | 2022-12-31 | 13G | AMPHASTAR PHARMACEUTICALS INC AMPH | FEDERATED HERMES INC. FHI | 3,284,217 6.800% | -180,118 (-5.20%) | Filing History |
| 2023-01-27 4:06 pm Purchase | 2022-12-31 | 13G | AMPHASTAR PHARMACEUTICALS INC AMPH | Zhang Jack Y. | 13,110,695 25.500% | 278,160 (+2.17%) | Filing History |
| 2023-01-26 08:43 am Unchanged | 2022-12-31 | 13G | AMPHASTAR PHARMACEUTICALS INC AMPH | BlackRock Inc. BLK | 7,038,769 14.600% | 0 (Unchanged) | Filing History |
| 2023-01-20 09:43 am Sale | 2022-12-31 | 13G | AMPHASTAR PHARMACEUTICALS INC AMPH | BlackRock Inc. BLK | 7,038,769 14.600% | -121,896 (-1.70%) | Filing History |
| 2022-02-14 1:29 pm Sale | 2021-12-31 | 13G | AMPHASTAR PHARMACEUTICALS INC AMPH | FEDERATED HERMES INC. FHI | 3,464,335 7.240% | -6,685,665 (-65.87%) | Filing History |
| 2022-02-11 4:05 pm Purchase | 2021-12-31 | 13G | AMPHASTAR PHARMACEUTICALS INC AMPH | Zhang Jack Y. | 12,832,535 25.500% | 344,756 (+2.76%) | Filing History |
| 2022-02-09 3:24 pm Sale | 2021-12-31 | 13G | AMPHASTAR PHARMACEUTICALS INC AMPH | VANGUARD GROUP INC | 2,468,111 5.160% | -9,916 (-0.40%) | Filing History |
| 2022-01-28 1:54 pm Purchase | 2021-12-31 | 13G | AMPHASTAR PHARMACEUTICALS INC AMPH | BlackRock Inc. BLK | 7,160,665 15.000% | 16,499 (+0.23%) | Filing History |