| Date | Name | Symbol | Type | Security | Shares | Price | Value | Ownership | Reported |
| 10/02/2023 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 500 | $45.78 | $22.9k | | 10/02/2023 |
| 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 |
| 05/17/2023 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 5k | $43.13 | $215.7k | | 05/17/2023 |
| 04/03/2023 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 491 | $37.72 | $18.5k | | 04/03/2023 |
| 03/01/2023 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 1 | $33.70 | $33.7 | | 03/01/2023 |
| 03/01/2023 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 412 | $36.59 | $15.1k | | 03/01/2023 |
| 03/01/2023 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 87 | $37.25 | $3.2k | | 03/01/2023 |
| 01/03/2023 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 500 | $27.94 | $14k | | 01/03/2023 |
| 12/01/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 500 | $30.13 | $15.1k | | 12/01/2022 |
| 10/03/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 500 | $28.59 | $14.3k | | 10/03/2022 |
| 09/01/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 500 | $29.44 | $14.7k | | 09/01/2022 |
| 08/01/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 500 | $37.48 | $18.7k | | 08/01/2022 |
| 07/01/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 500 | $34.78 | $17.4k | | 07/01/2022 |
| 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 |
| 06/01/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 380 | $36.79 | $14k | | 06/01/2022 |
| 06/01/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 120 | $37.67 | $4.5k | | 06/01/2022 |
| 05/02/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 268 | $35.15 | $9.4k | | 05/02/2022 |
| 05/02/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 27 | $35.52 | $958.9 | | 05/02/2022 |
| 04/01/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 437 | $36.59 | $16k | | 04/01/2022 |
| 04/01/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 63 | $37.35 | $2.4k | | 04/01/2022 |
| 03/01/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 500 | $27.27 | $13.6k | | 03/01/2022 |
| 02/01/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 89 | $23.37 | $2.1k | | 02/01/2022 |
| 02/01/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 411 | $24.24 | $10k | | 02/01/2022 |
| 01/03/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 500 | $23.22 | $11.6k | | 01/03/2022 |
| 12/22/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 1000 | $22.50 | $22.5k | | 12/22/2021 |
| 06/07/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 15.8k | $19.34 | $306k | | 06/07/2021 |
| 06/07/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Grant | Common Stock | 6k | $0.00 | $0 | | 06/07/2021 |
| 06/07/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Exercise | Stock Option (right to buy) | 15.8k | $16.43 | $260k | | 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 |
| 06/03/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 10k | $18.65 | $186.5k | | 06/03/2021 |
| 06/03/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Exercise | Stock option (right to buy) | 10k | $16.43 | $164.3k | | 06/03/2021 |
| 02/01/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 639 | $18.26 | $11.7k | | 02/01/2021 |
| 12/01/2020 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 500 | $17.87 | $8.9k | | 12/01/2020 |
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