| Date | Name | Symbol | Type | Security | Shares | Price | Value | Ownership | Reported |
| 05/18/2023 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 10k | $44.21 | $442k | | 05/18/2023 |
| 05/18/2023 | Amphastar Pharmaceuticals, Inc. | AMPH | Exercise | Employee Stock Option (right to buy) | 10k | $14.40 | $144k | | 05/18/2023 |
| 03/17/2023 | Amphastar Pharmaceuticals, Inc. | AMPH | Payment of Exercise | Common Stock | 1.9k | $36.29 | $69k | | 03/16/2023 |
| 03/16/2023 | Amphastar Pharmaceuticals, Inc. | AMPH | Payment of Exercise | Common Stock | 2.3k | $37.60 | $85.8k | | 03/16/2023 |
| 03/15/2023 | Amphastar Pharmaceuticals, Inc. | AMPH | Payment of Exercise | Common Stock | 2.1k | $36.84 | $75.8k | | 03/15/2023 |
| 03/06/2023 | Amphastar Pharmaceuticals, Inc. | AMPH | Grant | Common Stock | 15.1k | $0.00 | $0 | | 03/06/2023 |
| 03/06/2023 | Amphastar Pharmaceuticals, Inc. | AMPH | Grant | Employee Stock Option (right to buy) | 31.9k | $35.13 | $1.1M | | 03/06/2023 |
| 03/17/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Payment of Exercise | Common Stock | 2.4k | $34.18 | $83.6k | | 03/16/2022 |
| 03/16/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Payment of Exercise | Common Stock | 2.3k | $34.22 | $78.1k | | 03/16/2022 |
| 03/15/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Grant | Common Stock | 13.7k | $0.00 | $0 | | 03/15/2022 |
| 03/15/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Payment of Exercise | Common Stock | 1.7k | $34.74 | $57.4k | | 03/15/2022 |
| 03/15/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Grant | Employee Stock Option (right to buy) | 31.5k | $34.74 | $1.1M | | 03/15/2022 |
| 02/08/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 7k | $26.77 | $187.4k | | 02/08/2022 |
| 02/08/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Exercise | Employee Stock Option (right to buy) | 7k | $10.93 | $76.5k | | 02/08/2022 |
| 01/10/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Exercise | Employee Stock Option (right to buy) | 14k | $10.93 | $153k | | 01/10/2022 |
| 01/10/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 10.7k | $24.96 | $266.5k | | 01/10/2022 |
| 01/10/2022 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 10.3k | $25.77 | $264.2k | | 01/10/2022 |
| 11/11/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Exercise | Employee Stock Option (right to buy) | 7.8k | $10.48 | $81.9k | | 11/11/2021 |
| 11/11/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 7.8k | $21.67 | $169.3k | | 11/11/2021 |
| 07/26/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 6k | $20.87 | $125.2k | | 07/26/2021 |
| 07/26/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Exercise | Employee Stock Option (right to buy) | 6k | $10.48 | $62.9k | | 07/26/2021 |
| 07/20/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Exercise | Employee Stock Option (right to buy) | 5.2k | $10.48 | $54.4k | | 07/20/2021 |
| 07/20/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 5.2k | $20.57 | $106.7k | | 07/20/2021 |
| 06/09/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 4.7k | $19.58 | $92.7k | | 06/08/2021 |
| 06/08/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Exercise | Employee Stock Option (right to buy) | 8.2k | $14.23 | $116.4k | | 06/08/2021 |
| 06/08/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 8.2k | $19.34 | $158.2k | | 06/08/2021 |
| 03/17/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Grant | Common Stock | 22k | $0.00 | $0 | | 03/16/2021 |
| 03/17/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Grant | Employee Stock Option (right to buy) | 51.6k | $17.99 | $928.7k | | 03/16/2021 |
| 03/16/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Payment of Exercise | Common Stock | 3.3k | $18.44 | $60.9k | | 03/16/2021 |
| 03/15/2021 | Amphastar Pharmaceuticals, Inc. | AMPH | Payment of Exercise | Common Stock | 1.7k | $19.15 | $31.6k | | 03/15/2021 |
| 06/04/2020 | Amphastar Pharmaceuticals, Inc. | AMPH | Exercise | Employee Stock Option (right to buy) | 8.9k | $11.41 | $101.8k | | 06/03/2020 |
| 06/04/2020 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 9.8k | $19.19 | $188.2k | | 06/03/2020 |
| 06/03/2020 | Amphastar Pharmaceuticals, Inc. | AMPH | Sale | Common Stock | 13.2k | $18.82 | $247.7k | | 06/03/2020 |
| 06/03/2020 | Amphastar Pharmaceuticals, Inc. | AMPH | Exercise | Employee Stock Option (right to buy) | 11.1k | $11.41 | $126.4k | | 06/03/2020 |
| 03/17/2020 | Amphastar Pharmaceuticals, Inc. | AMPH | Payment of Exercise | Common Stock | 992 | $14.50 | $14.4k | | 03/16/2020 |
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