# Amphastar Pharmaceuticals, Inc.: filings

AMPH · Nasdaq · CIK 1297184 · [Healthcare](/sectors/healthcare.md) · fiscal year ends Dec 31

Pages: [Overview](/companies/amph.md) · [Financials](/companies/amph/financials.md) · [Filings](/companies/amph/filings.md) · [Insiders](/companies/amph/insiders.md)

## Reports and events: 170 filings

Newest first, by EDGAR acceptance time (Eastern). Filter with ?form= one of: `periodic`, `8-K`, `10-K`, `10-Q`, `4`, `proxy`, `13dg`, `all`, or any form this company filed (4 576, 8-K 102, 144 65, 10-Q 37, SC 13G/A 22, 3 20, DEFA14A 15, 10-K 12, DEF 14A 12, S-8 12, CORRESP 10, UPLOAD 9, ARS 5, SC 13G 5, EFFECT 4, 4/A 3, 8-K/A 3, CT ORDER 3, DRS/A 3, S-1/A 3, S-3 3, SCHEDULE 13G/A 2, 3/A 1, 424B4 1, 8-A12B 1, CERTNAS 1, DRS 1, DRSLTR 1, FWP 1, PRE 14A 1, RW 1, S-1 1, S-1MEF 1, SCHEDULE 13G 1).

| Filed | Accepted | Form | What it is | Accession |
| --- | --- | --- | --- | --- |
| 2026-08-06 | 16:50 ET | [10-Q](/filings/0001297184-26-000047.md) | Quarterly report, period 2026-06-30 | 0001297184-26-000047 |
| 2026-08-06 | 16:32 ET | [8-K](/filings/0001297184-26-000045.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001297184-26-000045 |
| 2026-07-13 | 06:01 ET | [8-K](/filings/0001104659-26-082772.md) | 5.02 Departure or appointment of officers or directors | 0001104659-26-082772 |
| 2026-07-08 | 20:03 ET | [8-K](/filings/0001297184-26-000041.md) | 8.01 Other events | 0001297184-26-000041 |
| 2026-06-03 | 16:15 ET | [8-K](/filings/0001297184-26-000038.md) | 5.07 Shareholder vote results | 0001297184-26-000038 |
| 2026-05-07 | 16:48 ET | [10-Q](/filings/0001297184-26-000033.md) | Quarterly report, period 2026-03-31 | 0001297184-26-000033 |
| 2026-05-07 | 16:22 ET | [8-K](/filings/0001297184-26-000031.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001297184-26-000031 |
| 2026-04-13 | 16:18 ET | [DEF 14A](/filings/0001297184-26-000023.md) | Proxy statement, period 2026-06-01 | 0001297184-26-000023 |
| 2026-03-16 | 06:00 ET | [8-K](/filings/0001104659-26-027814.md) | 8.01 Other events | 0001104659-26-027814 |
| 2026-03-06 | 16:17 ET | [8-K](/filings/0001297184-26-000015.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001297184-26-000015 |
| 2026-03-06 | 16:12 ET | [8-K](/filings/0001297184-26-000013.md) | 1.01 Entry into a material agreement; 9.01 Financial statements and exhibits | 0001297184-26-000013 |
| 2026-02-26 | 16:41 ET | [10-K](/filings/0001297184-26-000009.md) | Annual report, period 2025-12-31 | 0001297184-26-000009 |
| 2026-02-26 | 16:24 ET | [8-K](/filings/0001297184-26-000007.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001297184-26-000007 |
| 2026-01-12 | 17:15 ET | [8-K](/filings/0001297184-26-000002.md) | 1.01 Entry into a material agreement; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001297184-26-000002 |
| 2025-11-06 | 16:38 ET | [10-Q](/filings/0001297184-25-000064.md) | Quarterly report, period 2025-09-30 | 0001297184-25-000064 |
| 2025-11-06 | 16:25 ET | [8-K](/filings/0001297184-25-000062.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001297184-25-000062 |
| 2025-10-24 | 16:21 ET | [8-K](/filings/0001297184-25-000058.md) | 1.01 Entry into a material agreement | 0001297184-25-000058 |
| 2025-09-18 | 16:46 ET | [8-K](/filings/0001297184-25-000054.md) | 1.01 Entry into a material agreement | 0001297184-25-000054 |
| 2025-08-12 | 06:10 ET | [8-K](/filings/0001558370-25-011134.md) | 1.01 Entry into a material agreement; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001558370-25-011134 |
| 2025-08-07 | 16:43 ET | [10-Q](/filings/0001297184-25-000050.md) | Quarterly report, period 2025-06-30 | 0001297184-25-000050 |
| 2025-08-07 | 16:31 ET | [8-K](/filings/0001297184-25-000048.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001297184-25-000048 |
| 2025-07-21 | 16:14 ET | [8-K](/filings/0001297184-25-000040.md) | 5.02 Departure or appointment of officers or directors | 0001297184-25-000040 |
| 2025-06-04 | 20:46 ET | [8-K](/filings/0001297184-25-000036.md) | 5.03 Amendment to articles or bylaws; 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0001297184-25-000036 |
| 2025-05-08 | 16:24 ET | [10-Q](/filings/0001297184-25-000029.md) | Quarterly report, period 2025-03-31 | 0001297184-25-000029 |
| 2025-05-07 | 16:23 ET | [8-K](/filings/0001297184-25-000025.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001297184-25-000025 |
| 2025-04-14 | 16:07 ET | [DEF 14A](/filings/0001297184-25-000018.md) | Proxy statement, period 2025-06-02 | 0001297184-25-000018 |
| 2025-03-03 | 16:16 ET | [10-K](/filings/0001297184-25-000008.md) | Annual report, period 2024-12-31 | 0001297184-25-000008 |
| 2025-02-27 | 16:33 ET | [8-K](/filings/0001297184-25-000003.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001297184-25-000003 |
| 2024-11-07 | 16:18 ET | [10-Q](/filings/0001297184-24-000058.md) | Quarterly report, period 2024-09-30 | 0001297184-24-000058 |
| 2024-11-06 | 16:31 ET | [8-K](/filings/0001297184-24-000055.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001297184-24-000055 |
| 2024-08-30 | 16:14 ET | [8-K](/filings/0001297184-24-000051.md) | 1.01 Entry into a material agreement | 0001297184-24-000051 |
| 2024-08-09 | 16:15 ET | [10-Q](/filings/0001297184-24-000048.md) | Quarterly report, period 2024-06-30 | 0001297184-24-000048 |
| 2024-08-07 | 16:22 ET | [8-K](/filings/0001297184-24-000045.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001297184-24-000045 |
| 2024-06-04 | 16:14 ET | [8-K](/filings/0001297184-24-000042.md) | 5.02 Departure or appointment of officers or directors; 5.07 Shareholder vote results; 8.01 Other events; 9.01 Financial statements and exhibits | 0001297184-24-000042 |
| 2024-05-10 | 17:50 ET | [10-Q](/filings/0001297184-24-000037.md) | Quarterly report, period 2024-03-31 | 0001297184-24-000037 |
| 2024-05-08 | 16:18 ET | [8-K](/filings/0001297184-24-000033.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001297184-24-000033 |
| 2024-04-12 | 16:08 ET | [DEF 14A](/filings/0001297184-24-000019.md) | Proxy statement, period 2024-06-03 | 0001297184-24-000019 |
| 2024-02-29 | 16:12 ET | [10-K](/filings/0001297184-24-000009.md) | Annual report, period 2023-12-31 | 0001297184-24-000009 |
| 2024-02-28 | 16:38 ET | [8-K](/filings/0001297184-24-000004.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001297184-24-000004 |
| 2023-11-08 | 16:24 ET | [10-Q](/filings/0001297184-23-000082.md) | Quarterly report, period 2023-09-30 | 0001297184-23-000082 |
| 2023-11-08 | 16:14 ET | [8-K](/filings/0001297184-23-000079.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001297184-23-000079 |
| 2023-09-15 | 16:11 ET | [8-K](/filings/0001297184-23-000074.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 3.02 Unregistered sale of equity; 8.01 Other events; 9.01 Financial statements and exhibits | 0001297184-23-000074 |
| 2023-08-16 | 17:24 ET | [8-K/A](/filings/0001297184-23-000070.md) | 9.01 Financial statements and exhibits | 0001297184-23-000070 |
| 2023-08-09 | 18:18 ET | [10-Q](/filings/0001297184-23-000066.md) | Quarterly report, period 2023-06-30 | 0001297184-23-000066 |
| 2023-08-08 | 16:17 ET | [8-K](/filings/0001297184-23-000063.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001297184-23-000063 |
| 2023-06-30 | 16:21 ET | [8-K](/filings/0001297184-23-000057.md) | 1.01 Entry into a material agreement; 2.01 Completion of an acquisition or disposition; 2.03 New direct financial obligation; 8.01 Other events; 9.01 Financial statements and exhibits | 0001297184-23-000057 |
| 2023-06-06 | 18:32 ET | [8-K](/filings/0001297184-23-000053.md) | 5.07 Shareholder vote results | 0001297184-23-000053 |
| 2023-05-09 | 16:54 ET | [10-Q](/filings/0001297184-23-000049.md) | Quarterly report, period 2023-03-31 | 0001297184-23-000049 |
| 2023-05-09 | 16:19 ET | [8-K](/filings/0001297184-23-000046.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001297184-23-000046 |
| 2023-04-24 | 07:17 ET | [8-K](/filings/0001558370-23-006469.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 8.01 Other events; 9.01 Financial statements and exhibits | 0001558370-23-006469 |

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Source: SEC EDGAR, the company’s filing index. Last ingested by Listed: Oct 24, 2026, 15:10 ET. No prices; not investment advice.