| Date | Name | Symbol | Type | Security | Shares | Price | Value | Ownership | Reported |
| 08/15/2023 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 12.8k | $57.22 | $730k | | 08/15/2023 |
| 06/05/2023 | Amphastar Pharmaceuticals, Inc. | AMPH | Grant | Common Stock | 2.7k | $0.00 | $0 | | 06/05/2023 |
| 06/05/2023 | Amphastar Pharmaceuticals, Inc. | AMPH | Grant | Stock Option (right to buy) | 7k | $46.01 | $322.8k | | 06/05/2023 |
| 05/15/2023 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 7.5k | $42.18 | $316.3k | | 05/15/2023 |
| 06/10/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Grant | Common Stock | 4.2k | $0.00 | $0 | | 06/10/2022 |
| 06/10/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Grant | Stock Option (right to buy) | 11k | $30.02 | $329.7k | | 06/10/2022 |
| 05/16/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 10.3k | $35.61 | $366.5k | | 05/16/2022 |
| 05/16/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Exercise | Stock Option (right to buy) | 10.3k | $17.11 | $176.1k | | 05/16/2022 |
| 03/16/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 10k | $33.71 | $337.1k | | 03/16/2022 |
| 03/16/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Exercise | Stock Option (right to buy) | 10k | $17.11 | $171.1k | | 03/16/2022 |
| 06/07/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Grant | Common Stock | 6k | $0.00 | $0 | | 06/07/2021 |
| 06/07/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Grant | Stock Option (right to buy) | 17.2k | $19.52 | $335.4k | | 06/07/2021 |
| 05/13/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 25.8k | $19.34 | $499.4k | | 05/13/2021 |
| 05/13/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Exercise | Stock Option (right to buy) | 25.8k | $16.43 | $424.3k | | 05/13/2021 |
| 06/08/2020 | Amphastar Pharmaceuticals, Inc. | AMPH | Grant | Common Stock | 5.9k | $0.00 | $0 | | 06/08/2020 |
| 06/08/2020 | Amphastar Pharmaceuticals, Inc. | AMPH | Grant | Stock Option (right to buy) | 16k | $20.08 | $321.4k | | 06/08/2020 |
| 05/15/2020 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 23k | $18.03 | $413.7k | | 05/14/2020 |
| 05/15/2020 | Amphastar Pharmaceuticals, Inc. | AMPH | Exercise | Stock Option (right to buy) | 23k | $15.11 | $346.8k | | 05/14/2020 |
| 05/14/2020 | Amphastar Pharmaceuticals, Inc. | AMPH | Exercise | Stock Option (right to buy) | 14.8k | $15.11 | $224.1k | | 05/14/2020 |
| 05/14/2020 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 14.8k | $18.00 | $267k | | 05/14/2020 |
| 05/12/2020 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 10k | $19.00 | $190k | | 05/12/2020 |
| 05/12/2020 | Amphastar Pharmaceuticals, Inc. | AMPH | Exercise | Stock Option (right to buy) | 10k | $15.11 | $151.1k | | 05/12/2020 |
| 06/12/2019 | Amphastar Pharmaceuticals, Inc. | AMPH | Grant | Common Stock | 5.5k | $0.00 | $0 | | 06/12/2019 |
| 06/12/2019 | Amphastar Pharmaceuticals, Inc. | AMPH | Grant | Stock Option (right to buy) | 13.9k | $20.03 | $278.7k | | 06/12/2019 |
| 11/14/2018 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 29.3k | $20.39 | $596.9k | | 11/14/2018 |
| 11/14/2018 | Amphastar Pharmaceuticals, Inc. | AMPH | Exercise | Stock Option (right to buy) | 29.3k | $14.66 | $429.2k | | 11/14/2018 |
| 06/12/2018 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 15k | $16.52 | $247.8k | | 06/12/2018 |
| 06/07/2018 | Amphastar Pharmaceuticals, Inc. | AMPH | Grant | Common Stock | 6.6k | $0.00 | $0 | | 06/07/2018 |
| 06/07/2018 | Amphastar Pharmaceuticals, Inc. | AMPH | Grant | Stock Option (right to buy) | 16.7k | $16.69 | $278.4k | | 06/07/2018 |
| 06/08/2017 | Amphastar Pharmaceuticals, Inc. | AMPH | Grant | Common Stock | 5.8k | $0.00 | $0 | | 06/08/2017 |
| 06/08/2017 | Amphastar Pharmaceuticals, Inc. | AMPH | Grant | Stock Option (right to buy) | 20.3k | $17.11 | $347.2k | | 06/08/2017 |
| 06/01/2017 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 15k | $17.01 | $255.2k | | 06/01/2017 |
| 06/01/2017 | Amphastar Pharmaceuticals, Inc. | AMPH | Exercise | Stock Option (right to buy) | 15k | $10.77 | $161.6k | | 06/01/2017 |