| Date | Name | Symbol | Type | Security | Shares | Price | Value | Ownership | Reported |
| 06/04/2023 | Amphastar Pharmaceuticals, Inc. | AMPH | Payment of Exercise | Common Stock | 378 | $46.70 | $17.7k | | 06/04/2023 |
| 03/17/2023 | Amphastar Pharmaceuticals, Inc. | AMPH | Payment of Exercise | Common Stock | 1.7k | $36.29 | $60.7k | | 03/16/2023 |
| 03/16/2023 | Amphastar Pharmaceuticals, Inc. | AMPH | Payment of Exercise | Common Stock | 1.6k | $37.60 | $60.9k | | 03/16/2023 |
| 03/15/2023 | Amphastar Pharmaceuticals, Inc. | AMPH | Payment of Exercise | Common Stock | 1.9k | $36.84 | $68.2k | | 03/15/2023 |
| 03/06/2023 | Amphastar Pharmaceuticals, Inc. | AMPH | Grant | Common Stock | 12.8k | $0.00 | $0 | | 03/06/2023 |
| 03/06/2023 | Amphastar Pharmaceuticals, Inc. | AMPH | Grant | Employee Stock Option (right to buy) | 26.9k | $35.13 | $944k | | 03/06/2023 |
| 08/09/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 3.1k | $39.00 | $119.1k | | 08/08/2022 |
| 08/09/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Exercise | Employee Stock Option (right to buy) | 3.1k | $19.79 | $60.5k | | 08/08/2022 |
| 08/08/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Exercise | Employee Stock Option (right to buy) | 5k | $19.79 | $99k | | 08/08/2022 |
| 08/08/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 5k | $38.00 | $190k | | 08/08/2022 |
| 07/15/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 7.4k | $36.97 | $272.1k | | 07/15/2022 |
| 07/15/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 3.5k | $35.94 | $125k | | 07/15/2022 |
| 07/15/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Exercise | Employee Stock Option (right to buy) | 10.8k | $19.79 | $214.5k | | 07/15/2022 |
| 06/14/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Payment of Exercise | Common Stock | 128 | $31.02 | $4k | | 06/14/2022 |
| 06/04/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Payment of Exercise | Common Stock | 264 | $37.77 | $10k | | 06/04/2022 |
| 03/17/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Payment of Exercise | Common Stock | 1.7k | $34.18 | $57.2k | | 03/16/2022 |
| 03/16/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Payment of Exercise | Common Stock | 1.6k | $34.22 | $55.4k | | 03/16/2022 |
| 03/15/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Grant | Common Stock | 11.5k | $0.00 | $0 | | 03/15/2022 |
| 03/15/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Payment of Exercise | Common Stock | 1.6k | $34.74 | $54.2k | | 03/15/2022 |
| 03/15/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Grant | Employee Stock Option (right to buy) | 26.6k | $34.74 | $922.9k | | 03/15/2022 |
| 07/15/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 31.5k | $20.01 | $630.7k | | 07/15/2021 |
| 07/15/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Exercise | Employee Stock Option (right to buy) | 23.4k | $13.35 | $311.7k | | 07/15/2021 |
| 07/15/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Exercise | Employee Stock Option (right to buy) | 7.7k | $13.03 | $100k | | 07/15/2021 |
| 06/14/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Payment of Exercise | Common Stock | 128 | $19.68 | $2.5k | | 06/14/2021 |
| 06/04/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Payment of Exercise | Common Stock | 264 | $18.79 | $5k | | 06/04/2021 |
| 05/17/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 9.6k | $19.99 | $192.7k | | 05/14/2021 |
| 05/17/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Exercise | Empoyee Stock Option (right to buy) | 9.6k | $11.33 | $109.2k | | 05/14/2021 |
| 05/14/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 3.2k | $19.92 | $63.5k | | 05/14/2021 |
| 05/12/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 4.6k | $19.33 | $88.7k | | 05/11/2021 |
| 05/11/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Exercise | Employee Stock Option (right to buy) | 10k | $11.33 | $113.3k | | 05/11/2021 |
| 05/11/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 10k | $19.06 | $190.6k | | 05/11/2021 |
| 03/17/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Grant | Common Stock | 19.3k | $0.00 | $0 | | 03/16/2021 |
| 03/17/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Grant | Employee Stock Option (right to buy) | 45.4k | $17.99 | $817.1k | | 03/16/2021 |
| 03/16/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Payment of Exercise | Common Stock | 2.4k | $18.44 | $44.8k | | 03/16/2021 |
| 03/15/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Payment of Exercise | Common Stock | 1.6k | $19.15 | $29.9k | | 03/15/2021 |
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