Amphastar Pharmaceuticals | 4: Statement of changes in beneficial ownership of securities-Officer PETERS WILLIAM J
Amphastar Pharmaceuticals | 4: Statement of changes in beneficial ownership of securities-Director Petersen Floyd F.
Amphastar Pharmaceuticals | 4: Statement of changes in beneficial ownership of securities-Director Petersen Floyd F.
Amphastar Pharmaceuticals | 4: Statement of changes in beneficial ownership of securities-Officer Zhang Jack Y.
Amphastar Pharmaceuticals | 4: Statement of changes in beneficial ownership of securities-Officer Liawatidewi Yakob
Amphastar Pharmaceuticals | 4: Statement of changes in beneficial ownership of securities-Officer Zhou Rong
Amphastar Pharmaceuticals | 4: Statement of changes in beneficial ownership of securities-Officer PETERS WILLIAM J
Amphastar Pharmaceuticals | 4: Statement of changes in beneficial ownership of securities-Officer PETERS WILLIAM J
Amphastar Pharmaceuticals | 4: Statement of changes in beneficial ownership of securities-Officer Liawatidewi Yakob
Amphastar Pharmaceuticals | 4: Statement of changes in beneficial ownership of securities-Officer Zhou Rong
Amphastar Pharmaceuticals | 4: Statement of changes in beneficial ownership of securities-Officer Zhang Jack Y.
Amphastar Pharmaceuticals | 4: Statement of changes in beneficial ownership of securities-Officer Zhang Jack Y.
Amphastar Pharmaceuticals | 4: Statement of changes in beneficial ownership of securities-Director ZASLOFF MICHAEL A
Amphastar Pharmaceuticals | 4: Statement of changes in beneficial ownership of securities-Officer Liawatidewi Yakob
Amphastar Pharmaceuticals | 4: Statement of changes in beneficial ownership of securities-Officer Zhou Rong
Amphastar Pharmaceuticals | 4: Statement of changes in beneficial ownership of securities-Officer PETERS WILLIAM J
Amphastar Pharmaceuticals | SC 13G/A: Statement of acquisition of beneficial ownership by individuals (Amendment)-Federated Hermes, Inc.(4.52%),Voting Shares Irrevocable Trust(4.52%), etc.
Amphastar Pharmaceuticals | 4: Statement of changes in beneficial ownership of securities-Director Petersen Floyd F.
Amphastar Pharmaceuticals | SC 13G/A: Statement of acquisition of beneficial ownership by individuals (Amendment)-The Vanguard Group(5.88%)
Amphastar Pharmaceuticals | SC 13G/A: Statement of acquisition of beneficial ownership by individuals (Amendment)-Jack Yongfeng Zhang(26.2%),Mary Ziping Luo(26.2%), etc.
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