Amphastar Pharmaceuticals, Inc. — DEFA14A Filings
14 DEFA14A filings on record
This page lists all DEFA14A 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 14 DEFA14A 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 |
|---|---|---|---|---|
| DEFA14A | DEFA14A | 0001297184-25-000020 | Apr 14, 2025 | — |
| DEFA14A | DEFA14A | 0001297184-24-000029 | Apr 19, 2024 | — |
| DEFA14A | DEFA14A | 0001297184-24-000022 | Apr 12, 2024 | — |
| DEFA14A | DEFA14A | 0001297184-23-000037 | Apr 14, 2023 | — |
| DEFA14A | DEFA14A | 0001297184-22-000017 | Apr 14, 2022 | — |
| DEFA14A | DEFA14A | 0001297184-21-000033 | May 7, 2021 | — |
| DEFA14A | DEFA14A | 0001297184-21-000017 | Apr 14, 2021 | — |
| DEFA14A | DEFA14A | 0001297184-20-000020 | Apr 15, 2020 | — |
| DEFA14A | DEFA14A | 0001297184-19-000021 | Apr 18, 2019 | — |
| DEFA14A | DEFA14A | 0001297184-19-000011 | Mar 15, 2019 | — |
| DEFA14A | DEFA14A | 0001297184-18-000022 | Apr 18, 2018 | — |
| DEFA14A | DEFA14A | 0001297184-17-000013 | Apr 21, 2017 | — |
| DEFA14A | DEFA14A | 0001297184-16-000005 | Apr 22, 2016 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001171843-15-001881 | Apr 8, 2015 | — |