AMPH News
Official issuer or fund updates, exact SEC current reports, and large established publisher coverage, newest first. Every lawfully retained item remains in the corpus; each public page contains at most 100 rows. Headlines open the exact source; summaries are concise descriptions and not investment recommendations. Captured 2026-08-31.
| Date | Type | Publisher | Headline | Summary |
|---|---|---|---|---|
| 2026-08-06 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2026-07-13 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 5.02. |
| 2026-07-08 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 8.01. |
| 2026-06-03 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 5.07. |
| 2026-05-07 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2026-03-16 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 8.01. |
| 2026-03-06 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 1.01,9.01. |
| 2026-03-06 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 5.02,9.01. |
| 2026-02-26 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2026-01-12 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 1.01,7.01,9.01. |
| 2025-11-06 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2025-10-24 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 1.01. |
| 2025-09-18 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 1.01. |
| 2025-08-12 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 1.01,7.01,9.01. |
| 2025-08-07 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2025-07-21 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 5.02. |
| 2025-06-04 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 5.03,5.07,9.01. |
| 2025-05-07 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2025-02-27 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2024-11-06 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2024-08-30 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 1.01. |
| 2024-08-07 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2024-06-04 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 5.02,5.07,8.01,9.01. |
| 2024-05-08 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2024-02-28 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2023-11-08 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2023-09-15 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 1.01,2.03,3.02,8.01,9.01. |
| 2023-08-16 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K/A | Amphastar Pharmaceuticals, Inc. filed Form 8-K/A covering items 9.01. |
| 2023-08-08 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2023-06-30 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 1.01,2.01,2.03,8.01,9.01. |
| 2023-06-06 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 5.07. |
| 2023-05-09 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2023-04-24 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 1.01,2.03,8.01,9.01. |
| 2023-03-10 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 1.01. |
| 2023-02-28 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2023-02-24 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 5.03,9.01. |
| 2022-11-18 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 1.01,9.01. |
| 2022-11-07 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2022-08-09 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 5.02. |
| 2022-08-08 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2022-07-08 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 1.01. |
| 2022-06-13 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 5.07. |
| 2022-05-09 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2022-04-22 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 1.01. |
| 2022-03-10 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2021-11-08 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2021-08-23 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 5.02. |
| 2021-08-20 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 1.01,2.01,5.02. |
| 2021-08-10 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 5.02. |
| 2021-08-09 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 1.01,1.02,2.03. |
| 2021-08-09 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2021-06-08 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 5.07. |
| 2021-05-07 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 1.01,2.01,5.02,7.01,9.01. |
| 2021-05-06 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2021-03-15 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2021-01-12 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 7.01,9.01. |
| 2020-11-06 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 5.02,8.01,9.01. |
| 2020-11-06 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2020-08-10 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K/A | Amphastar Pharmaceuticals, Inc. filed Form 8-K/A covering items 5.07. |
| 2020-08-06 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2020-06-09 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 5.07. |
| 2020-05-07 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2020-04-14 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K/A | Amphastar Pharmaceuticals, Inc. filed Form 8-K/A covering items 5.02,9.01. |
| 2020-04-13 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 5.02,9.01. |
| 2020-03-12 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2019-11-07 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2019-08-07 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2019-06-19 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2019-06-13 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 5.07. |
| 2019-05-09 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2019-03-14 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 5.02,8.01. |
| 2019-03-12 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2018-11-08 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2018-11-08 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2018-08-08 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2018-07-09 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 1.01,2.01,8.01,9.01. |
| 2018-06-08 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 5.07. |
| 2018-05-09 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2018-03-21 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2018-03-12 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2017-11-08 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2017-08-09 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2017-07-24 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2017-06-09 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 5.07. |
| 2017-05-08 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2017-03-13 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2016-12-27 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2016-11-10 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 1.01,8.01. |
| 2016-11-08 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2016-08-08 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2016-08-04 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2016-07-07 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 1.01,1.02,7.01,9.01. |
| 2016-06-10 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 5.07. |
| 2016-05-09 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2016-03-14 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2015-11-12 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2015-08-12 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2015-06-22 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2015-06-01 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 5.02,5.07,9.01. |
| 2015-05-13 | Current report | SEC filing | Amphastar Pharmaceuticals, Inc. filed Form 8-K | Amphastar Pharmaceuticals, Inc. filed Form 8-K covering items 2.02,9.01. |