Amphastar Pharmaceuticals, Inc. — 4 Filings
564 4 filings on record
This page lists all 4 filings submitted to the SEC by Amphastar Pharmaceuticals, Inc. (AMPH), sorted by most recent first. Each row links to the full filing on EdgarLookup. Amphastar Pharmaceuticals, Inc. has filed 564 4 documents with the SEC since 2005. To view all SEC filings by Amphastar Pharmaceuticals, Inc., see the full filings list.
All
10-K
10-Q
144
3
3/A
4
4/A
424B4
8-A12B
8-K
8-K/A
ARS
CERTNAS
CORRESP
CT ORDER
DEF 14A
DEFA14A
DRS
DRS/A
DRSLTR
EFFECT
FWP
PRE 14A
REGDEX
RW
S-1
S-1/A
S-1MEF
S-3
S-8
SC 13G
SC 13G/A
SCHEDULE 13G/A
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| 4 | — | 0001645326-26-000010 | Mar 17, 2026 | Mar 15, 2026 |
| 4 | — | 0000889740-26-000007 | Mar 17, 2026 | Mar 15, 2026 |
| 4 | — | 0001263136-26-000010 | Mar 17, 2026 | Mar 15, 2026 |
| 4 | — | 0001743927-26-000010 | Mar 17, 2026 | Mar 15, 2026 |
| 4 | — | 0001743927-26-000008 | Mar 11, 2026 | Mar 9, 2026 |
| 4 | — | 0001263136-26-000008 | Mar 11, 2026 | Mar 9, 2026 |
| 4 | — | 0001645326-26-000008 | 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 | — | 0000889740-26-000003 | Mar 10, 2026 | Mar 6, 2026 |
| 4 | — | 0001743927-26-000006 | Mar 10, 2026 | Mar 6, 2026 |
| 4 | — | 0001645326-26-000006 | Mar 10, 2026 | Mar 6, 2026 |
| 4 | — | 0001743927-26-000003 | Mar 6, 2026 | Mar 4, 2026 |
| 4 | — | 0001645326-26-000003 | Mar 6, 2026 | Mar 4, 2026 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-26-024842 | Mar 6, 2026 | Mar 4, 2026 |
| 4 | — | 0001263136-26-000003 | Mar 6, 2026 | Mar 4, 2026 |
| 4 | — | 0001645326-25-000004 | Dec 18, 2025 | Dec 17, 2025 |
| 4 | — | 0001611286-25-000011 | Dec 15, 2025 | Dec 11, 2025 |
| 4 | — | 0001047579-25-000006 | Nov 25, 2025 | — |
| 4 | — | 0001611286-25-000009 | Nov 17, 2025 | Nov 13, 2025 |
| 4 | — | 0001611286-25-000007 | Nov 5, 2025 | Nov 3, 2025 |
| 4 | — | 0001611286-25-000005 | Oct 2, 2025 | Oct 1, 2025 |
| 4 | — | 0001415889-25-023538 | Sep 3, 2025 | Sep 2, 2025 |
| 4 | — | 0001415889-25-020987 | Aug 4, 2025 | Aug 1, 2025 |
| 4 | — | 0001415889-25-020123 | Jul 22, 2025 | Jul 18, 2025 |
| 4 | — | 0001415889-25-019356 | Jul 3, 2025 | Jul 2, 2025 |
| 4 | — | 0001415889-25-017423 | Jun 16, 2025 | Jun 13, 2025 |
| 4 | — | 0001415889-25-015660 | Jun 4, 2025 | Jun 2, 2025 |
| 4 | — | 0001415889-25-015664 | Jun 4, 2025 | Jun 2, 2025 |
| 4 | — | 0001415889-25-015676 | Jun 4, 2025 | Jun 2, 2025 |
| 4 | — | 0001415889-25-015686 | Jun 4, 2025 | Jun 2, 2025 |
| 4 | — | 0001415889-25-015656 | Jun 4, 2025 | Jun 2, 2025 |
| 4 | — | 0001415889-25-015658 | Jun 4, 2025 | Jun 2, 2025 |
| 4 | — | 0001415889-25-013821 | May 20, 2025 | May 19, 2025 |
| 4 | — | 0001415889-25-011878 | May 2, 2025 | May 1, 2025 |
| 4 | — | 0001415889-25-009776 | Apr 2, 2025 | Apr 1, 2025 |
| 4 | — | 0001415889-25-008523 | Mar 18, 2025 | Mar 14, 2025 |
| 4 | — | 0001415889-25-008525 | Mar 18, 2025 | Mar 15, 2025 |
| 4 | — | 0001415889-25-008497 | Mar 18, 2025 | Mar 15, 2025 |
| 4 | — | 0001415889-25-008500 | Mar 18, 2025 | Mar 15, 2025 |
| 4 | — | 0001415889-25-007791 | Mar 12, 2025 | Mar 10, 2025 |
| 4 | — | 0001415889-25-007798 | Mar 12, 2025 | Mar 10, 2025 |
| 4 | — | 0001415889-25-007783 | Mar 12, 2025 | Mar 10, 2025 |
| 4 | — | 0001415889-25-007831 | Mar 12, 2025 | Mar 10, 2025 |
| 4 | — | 0001415889-25-007501 | Mar 10, 2025 | Mar 6, 2025 |
| 4 | — | 0001415889-25-007561 | Mar 10, 2025 | Mar 6, 2025 |
| 4 | — | 0001415889-25-007503 | Mar 10, 2025 | Mar 6, 2025 |
| 4 | — | 0001415889-25-007542 | Mar 10, 2025 | Mar 6, 2025 |
| 4 | — | 0001415889-25-007365 | Mar 7, 2025 | Mar 6, 2025 |
| 4 | — | 0001415889-25-007241 | Mar 6, 2025 | Mar 4, 2025 |