Amphastar Pharmaceuticals, Inc. — All Filings
924 total filings on record
Public companies registered with the SEC are required to file periodic reports, disclosures, and notices throughout the year. The most important are the 10-K (annual report), 10-Q (quarterly report), and 8-K (material event notice). Use the filters below to narrow by form type.
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144
3
3/A
4
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424B4
8-A12B
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CERTNAS
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CT ORDER
DEF 14A
DEFA14A
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SCHEDULE 13G/A
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| SCHEDULE 13G/A | — | 0000102909-26-000687 | Mar 26, 2026 | — |
| 4 | — | 0001743927-26-000010 | Mar 17, 2026 | Mar 15, 2026 |
| 4 | — | 0001645326-26-000010 | Mar 17, 2026 | Mar 15, 2026 |
| 4 | — | 0001263136-26-000010 | Mar 17, 2026 | Mar 15, 2026 |
| 4 | — | 0000889740-26-000007 | Mar 17, 2026 | Mar 15, 2026 |
| 8-K | 8-K | 0001104659-26-027814 | Mar 16, 2026 | Mar 12, 2026 |
| 4 | — | 0001263136-26-000008 | Mar 11, 2026 | Mar 9, 2026 |
| 4 | — | 0001645326-26-000008 | Mar 11, 2026 | Mar 9, 2026 |
| 4 | — | 0001743927-26-000008 | Mar 11, 2026 | Mar 9, 2026 |
| 4 | — | 0000889740-26-000005 | Mar 11, 2026 | Mar 9, 2026 |
| 4 | — | 0001263136-26-000006 | Mar 10, 2026 | Mar 6, 2026 |
| 4 | — | 0001645326-26-000006 | Mar 10, 2026 | Mar 6, 2026 |
| 4 | — | 0001743927-26-000006 | Mar 10, 2026 | Mar 6, 2026 |
| 4 | — | 0000889740-26-000003 | Mar 10, 2026 | Mar 6, 2026 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-26-024842 | Mar 6, 2026 | Mar 4, 2026 |
| 4 | — | 0001645326-26-000003 | Mar 6, 2026 | Mar 4, 2026 |
| 4 | — | 0001743927-26-000003 | Mar 6, 2026 | Mar 4, 2026 |
| 4 | — | 0001263136-26-000003 | Mar 6, 2026 | Mar 4, 2026 |
| 8-K | 8-K | 0001297184-26-000015 | Mar 6, 2026 | Mar 3, 2026 |
| 8-K | 8-K | 0001297184-26-000013 | Mar 6, 2026 | Mar 3, 2026 |
| 10-K | 10-K | 0001297184-26-000009 | Feb 26, 2026 | Dec 31, 2025 |
| 8-K | 8-K | 0001297184-26-000007 | Feb 26, 2026 | — |
| 8-K | 8-K | 0001297184-26-000002 | Jan 12, 2026 | Jan 6, 2026 |
| 4 | — | 0001645326-25-000004 | Dec 18, 2025 | Dec 17, 2025 |
| 4 | — | 0001611286-25-000011 | Dec 15, 2025 | Dec 11, 2025 |
| 144 | — | 0001969223-25-001078 | Dec 11, 2025 | — |
| 144 | — | 0001969223-25-001063 | Dec 10, 2025 | — |
| 144 | — | 0001969223-25-001002 | Nov 28, 2025 | — |
| 4 | — | 0001047579-25-000006 | Nov 25, 2025 | — |
| 144 | — | 0001969223-25-000996 | Nov 25, 2025 | — |
| 4 | — | 0001611286-25-000009 | Nov 17, 2025 | Nov 13, 2025 |
| 144 | — | 0001969223-25-000949 | Nov 13, 2025 | — |
| 10-Q | 10-Q | 0001297184-25-000064 | Nov 6, 2025 | Sep 30, 2025 |
| 8-K | 8-K | 0001297184-25-000062 | Nov 6, 2025 | — |
| 4 | — | 0001611286-25-000007 | Nov 5, 2025 | Nov 3, 2025 |
| 144 | — | 0001969223-25-000906 | Nov 3, 2025 | — |
| 8-K | 1.01 | 0001297184-25-000058 | Oct 24, 2025 | Oct 21, 2025 |
| SCHEDULE 13G/A | — | 0002012383-25-001740 | Oct 17, 2025 | — |
| 4 | — | 0001611286-25-000005 | Oct 2, 2025 | Oct 1, 2025 |
| 144 | — | 0001969223-25-000812 | Oct 1, 2025 | — |
| 8-K | 8-K | 0001297184-25-000054 | Sep 18, 2025 | Sep 15, 2025 |
| 4 | — | 0001415889-25-023538 | Sep 3, 2025 | Sep 2, 2025 |
| 144 | — | 0001969223-25-000696 | Sep 2, 2025 | — |
| 8-K | 8-K | 0001558370-25-011134 | Aug 12, 2025 | Aug 8, 2025 |
| 10-Q | 10-Q | 0001297184-25-000050 | Aug 7, 2025 | Jun 30, 2025 |
| 8-K | 8-K | 0001297184-25-000048 | Aug 7, 2025 | — |
| 4 | — | 0001415889-25-020987 | Aug 4, 2025 | Aug 1, 2025 |
| 144 | — | 0001969223-25-000553 | Aug 1, 2025 | — |
| 4 | — | 0001415889-25-020123 | Jul 22, 2025 | Jul 18, 2025 |
| 3 | — | 0001415889-25-020121 | Jul 22, 2025 | Jul 18, 2025 |