Amphastar Pharmaceuticals, Inc. — Director's Dealing 2025

Mar 12, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Amphastar Pharmaceuticals, Inc. (AMPH)
CIK: 0001297184
Period of Report: 2025-03-10

Reporting Person: PETERS WILLIAM J (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-03-10	Common Stock	A	36747	—	Acquired	130230	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-03-10	Employee Stock Option (right to buy)	$28.41	A	78039	Acquired	2035-03-10	Common Stock (78039)	Direct

Footnotes

F1: The reported shares are represented by restricted stock units, or RSUs, which vest in four equal annual installments beginning on March 10, 2026.

F2: The shares subject to the option vest in four equal annual installments beginning on March 10, 2026.