AMPHASTAR PHARMACEUTICALS IN filings

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SEC filings by AMPHASTAR PHARMACEUTICALS IN (ownership)
TypeFiledFilerSubjectShares OwnedPercent Owned
SC 13G/A2024-03-06FEDERATED HERMES, INC.Amphastar Pharmaceuticals, Inc.2,165,0714.5%EDGAR
SC 13G/A2024-02-13VANGUARD GROUP INCAmphastar Pharmaceuticals, Inc.2,814,7105.9%EDGAR
SC 13G/A2024-02-09Zhang Jack Y.Amphastar Pharmaceuticals, Inc.13,435,21026.2%EDGAR
SC 13G/A2024-01-23BlackRock Inc.Amphastar Pharmaceuticals, Inc.6,037,15812.6%EDGAR
SC 13G/A2024-01-17FEDERATED HERMES, INC.Amphastar Pharmaceuticals, Inc.3,272,7616.8%EDGAR
SC 13G/A2023-02-09VANGUARD GROUP INCAmphastar Pharmaceuticals, Inc.2,621,8075.4%EDGAR
SC 13G/A2023-02-01FEDERATED HERMES, INC.Amphastar Pharmaceuticals, Inc.3,284,2176.8%EDGAR
SC 13G/A2023-01-27Zhang Jack Y.Amphastar Pharmaceuticals, Inc.13,110,69525.5%EDGAR
SC 13G/A2023-01-26BlackRock Inc.Amphastar Pharmaceuticals, Inc.7,038,76914.6%EDGAR
SC 13G/A2023-01-20BlackRock Inc.Amphastar Pharmaceuticals, Inc.7,038,76914.6%EDGAR
SC 13G/A2022-02-14FEDERATED HERMES, INC.Amphastar Pharmaceuticals, Inc.3,464,3357.2%EDGAR
SC 13G/A2022-02-11Zhang Jack Y.Amphastar Pharmaceuticals, Inc.12,832,53525.5%EDGAR
SC 13G/A2022-02-09VANGUARD GROUP INCAmphastar Pharmaceuticals, Inc.2,468,1115.2%EDGAR
SC 13G/A2022-01-28BlackRock Inc.Amphastar Pharmaceuticals, Inc.7,160,66515.0%EDGAR
SC 13G/A2021-02-12Zhang Jack Y.Amphastar Pharmaceuticals, Inc.12,487,77925.2%EDGAR
SC 13G2021-02-12FEDERATED HERMES, INC.Amphastar Pharmaceuticals, Inc.3,225,8836.8%EDGAR
SC 13G/A2021-02-10VANGUARD GROUP INCAmphastar Pharmaceuticals, Inc.2,478,0275.2%EDGAR
SC 13G/A2021-01-26BlackRock Inc.Amphastar Pharmaceuticals, Inc.7,144,16615.0%EDGAR
SC 13G/A2020-02-14Zhang Jack Y.Amphastar Pharmaceuticals, Inc.12,997,68726.2%EDGAR
SC 13G2020-02-11VANGUARD GROUP INCAmphastar Pharmaceuticals, Inc.2,363,5045.0%EDGAR
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