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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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 |
|---|---|---|---|---|
| ARS | ARS | 0001297184-23-000040 | Apr 14, 2023 | Dec 31, 2022 |
| 144 | — | 0001969223-23-000033 | Apr 13, 2023 | — |
| 144 | — | 0001969223-23-000035 | Apr 13, 2023 | — |
| 4 | OWNERSHIP DOCUMENT | 0001104659-23-044690 | Apr 12, 2023 | Apr 10, 2023 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-23-044692 | Apr 12, 2023 | Apr 10, 2023 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-23-041701 | Apr 4, 2023 | Apr 3, 2023 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-23-034577 | Mar 20, 2023 | Mar 16, 2023 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-23-034573 | Mar 20, 2023 | Mar 16, 2023 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-23-034574 | Mar 20, 2023 | Mar 16, 2023 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-23-034576 | Mar 20, 2023 | Mar 16, 2023 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-23-034073 | Mar 17, 2023 | Mar 15, 2023 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-23-034072 | Mar 17, 2023 | Mar 15, 2023 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-23-034069 | Mar 17, 2023 | Mar 15, 2023 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-23-034071 | Mar 17, 2023 | Mar 15, 2023 |
| 8-K | 8-K | 0001297184-23-000026 | Mar 10, 2023 | Mar 8, 2023 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-23-030133 | Mar 8, 2023 | Mar 6, 2023 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-23-030092 | Mar 8, 2023 | Mar 6, 2023 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-23-030094 | Mar 8, 2023 | Mar 6, 2023 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-23-030097 | Mar 8, 2023 | Mar 6, 2023 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-23-028479 | Mar 3, 2023 | Mar 1, 2023 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-23-028073 | Mar 2, 2023 | Mar 1, 2023 |
| 10-K | 10-K | 0001297184-23-000019 | Mar 1, 2023 | Dec 31, 2022 |
| S-8 | S-8 | 0001297184-23-000022 | Mar 1, 2023 | — |
| 8-K | 8-K | 0001297184-23-000012 | Feb 28, 2023 | — |
| 8-K | 8-K | 0001297184-23-000007 | Feb 24, 2023 | Feb 23, 2023 |
| SC 13G/A | SCHEDULE 13G/A | 0001104659-23-015300 | Feb 9, 2023 | — |
| 4 | OWNERSHIP DOCUMENT | 0001104659-23-009940 | Feb 2, 2023 | Feb 1, 2023 |
| SC 13G/A | SC 13G/A | 0001104659-23-007522 | Jan 27, 2023 | — |
| SC 13G/A | — | 0001306550-23-004054 | Jan 26, 2023 | — |
| SC 13G/A | — | 0001306550-23-000633 | Jan 20, 2023 | — |
| 4 | OWNERSHIP DOCUMENT | 0001104659-23-000822 | Jan 4, 2023 | Jan 3, 2023 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-22-124113 | Dec 2, 2022 | Dec 1, 2022 |
| 8-K | 8-K | 0001297184-22-000060 | Nov 18, 2022 | Nov 15, 2022 |
| 10-Q | 10-Q | 0001297184-22-000056 | Nov 8, 2022 | Sep 30, 2022 |
| 8-K | 8-K | 0001297184-22-000053 | Nov 7, 2022 | — |
| 4 | OWNERSHIP DOCUMENT | 0001104659-22-113947 | Nov 2, 2022 | Nov 1, 2022 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-22-105977 | Oct 4, 2022 | Oct 3, 2022 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-22-097598 | Sep 2, 2022 | Sep 1, 2022 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-22-088691 | Aug 10, 2022 | Aug 8, 2022 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-22-088855 | Aug 10, 2022 | Aug 9, 2022 |
| 8-K | 8-K | 0001297184-22-000048 | Aug 9, 2022 | Aug 4, 2022 |
| 10-Q | 10-Q | 0001297184-22-000044 | Aug 9, 2022 | Jun 30, 2022 |
| 8-K | 8-K | 0001297184-22-000041 | Aug 8, 2022 | — |
| 4 | OWNERSHIP DOCUMENT | 0001104659-22-085271 | Aug 2, 2022 | Aug 1, 2022 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-22-080883 | Jul 19, 2022 | Jul 18, 2022 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-22-080589 | Jul 18, 2022 | Jul 15, 2022 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-22-079289 | Jul 12, 2022 | Jul 11, 2022 |
| 8-K | 8-K | 0001297184-22-000036 | Jul 8, 2022 | Jul 5, 2022 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-22-077826 | Jul 6, 2022 | Jul 5, 2022 |
| 4 | OWNERSHIP DOCUMENT | 0001104659-22-077306 | Jul 5, 2022 | Jun 30, 2022 |