Amphastar Pharmaceuticals, Inc. — 8-K Filings
97 8-K filings on record
This page lists all 8-K 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 97 8-K documents with the SEC since 2005. To view all SEC filings by Amphastar Pharmaceuticals, Inc., see the full filings list.
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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 |
|---|---|---|---|---|
| 8-K | 8-K | 0001104659-26-027814 | Mar 16, 2026 | Mar 12, 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 |
| 8-K | 8-K | 0001297184-26-000007 | Feb 26, 2026 | — |
| 8-K | 8-K | 0001297184-26-000002 | Jan 12, 2026 | Jan 6, 2026 |
| 8-K | 8-K | 0001297184-25-000062 | Nov 6, 2025 | — |
| 8-K | 1.01 | 0001297184-25-000058 | Oct 24, 2025 | Oct 21, 2025 |
| 8-K | 8-K | 0001297184-25-000054 | Sep 18, 2025 | Sep 15, 2025 |
| 8-K | 8-K | 0001558370-25-011134 | Aug 12, 2025 | Aug 8, 2025 |
| 8-K | 8-K | 0001297184-25-000048 | Aug 7, 2025 | — |
| 8-K | 8-K | 0001297184-25-000040 | Jul 21, 2025 | Jul 18, 2025 |
| 8-K | 8-K | 0001297184-25-000036 | Jun 4, 2025 | Jun 2, 2025 |
| 8-K | 8-K | 0001297184-25-000025 | May 7, 2025 | — |
| 8-K | 8-K | 0001297184-25-000003 | Feb 27, 2025 | — |
| 8-K | 8-K | 0001297184-24-000055 | Nov 6, 2024 | — |
| 8-K | 8-K | 0001297184-24-000051 | Aug 30, 2024 | Aug 28, 2024 |
| 8-K | 8-K | 0001297184-24-000045 | Aug 7, 2024 | — |
| 8-K | 8-K | 0001297184-24-000042 | Jun 4, 2024 | Jun 3, 2024 |
| 8-K | 8-K | 0001297184-24-000033 | May 8, 2024 | — |
| 8-K | 8-K | 0001297184-24-000004 | Feb 28, 2024 | — |
| 8-K | 8-K | 0001297184-23-000079 | Nov 8, 2023 | — |
| 8-K | 8-K | 0001297184-23-000074 | Sep 15, 2023 | Sep 11, 2023 |
| 8-K | 8-K | 0001297184-23-000063 | Aug 8, 2023 | — |
| 8-K | 8-K | 0001297184-23-000057 | Jun 30, 2023 | — |
| 8-K | 8-K | 0001297184-23-000053 | Jun 6, 2023 | Jun 5, 2023 |
| 8-K | 8-K | 0001297184-23-000046 | May 9, 2023 | — |
| 8-K | 8-K | 0001558370-23-006469 | Apr 24, 2023 | Apr 21, 2023 |
| 8-K | 8-K | 0001297184-23-000026 | Mar 10, 2023 | Mar 8, 2023 |
| 8-K | 8-K | 0001297184-23-000012 | Feb 28, 2023 | — |
| 8-K | 8-K | 0001297184-23-000007 | Feb 24, 2023 | Feb 23, 2023 |
| 8-K | 8-K | 0001297184-22-000060 | Nov 18, 2022 | Nov 15, 2022 |
| 8-K | 8-K | 0001297184-22-000053 | Nov 7, 2022 | — |
| 8-K | 8-K | 0001297184-22-000048 | Aug 9, 2022 | Aug 4, 2022 |
| 8-K | 8-K | 0001297184-22-000041 | Aug 8, 2022 | — |
| 8-K | 8-K | 0001297184-22-000036 | Jul 8, 2022 | Jul 5, 2022 |
| 8-K | 8-K | 0001297184-22-000032 | Jun 13, 2022 | Jun 10, 2022 |
| 8-K | 8-K | 0001297184-22-000026 | May 9, 2022 | — |
| 8-K | 8-K | 0001297184-22-000021 | Apr 22, 2022 | Apr 19, 2022 |
| 8-K | 8-K | 0001297184-22-000003 | Mar 10, 2022 | — |
| 8-K | 8-K | 0001297184-21-000062 | Nov 8, 2021 | — |
| 8-K | 8-K | 0001297184-21-000057 | Aug 23, 2021 | Aug 19, 2021 |
| 8-K | 8-K | 0001297184-21-000054 | Aug 20, 2021 | Aug 19, 2021 |
| 8-K | 8-K | 0001297184-21-000051 | Aug 10, 2021 | Aug 5, 2021 |
| 8-K | 8-K | 0001297184-21-000046 | Aug 9, 2021 | — |
| 8-K | 8-K | 0001297184-21-000041 | Aug 9, 2021 | Aug 4, 2021 |
| 8-K | 8-K | 0001297184-21-000037 | Jun 8, 2021 | Jun 7, 2021 |
| 8-K | 8-K | 0001297184-21-000029 | May 7, 2021 | May 6, 2021 |
| 8-K | 8-K | 0001297184-21-000022 | May 6, 2021 | — |
| 8-K | 8-K | 0001297184-21-000006 | Mar 15, 2021 | — |
| 8-K | 8-K | 0001558370-21-000171 | Jan 12, 2021 | — |