BlackRock, Inc. - 30 Sep 2025 SCHEDULE 13G/A Report for Amphastar Pharmaceuticals, Inc. Common Stock (AMPH)

Filing Manager: BlackRock, Inc.
Reporting Manager: BlackRock, Inc.
Security: Amphastar Pharmaceuticals, Inc. Common Stock
Symbol: AMPH
Shares outstanding: 46,377,939 shares
Disclosed Ownership: 5,333,463 shares
Ownership: 11.5%
Form type: SCHEDULE 13G/A
Filing time: 17 Oct 2025, 16:05:06 UTC
Date of event: 30 Sep 2025
SEC: View on sec.gov

Reporting Managers (1)

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
BlackRock, Inc.	11.5%	5,333,463	5,236,473	0	Spencer Fleming	Managing Director