Amphastar Pharmaceuticals, Inc. — Director's Dealing 2021

May 21, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Amphastar Pharmaceuticals, Inc. (AMPH)
CIK: 0001297184
Period of Report: 2021-05-19

Reporting Person: PETERS WILLIAM J (CFO, EVP & Treasurer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-05-19	Common Stock	A	3047	$0.00	Acquired	111349	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-05-19	Employee Stock Option (right to buy)	$19.82	A	7209	Acquired	2031-05-19	Common Stock (7209)	Direct

Footnotes

F1: The reported shares are represented by restricted stock units which vest in four equal annual installments beginning on May 19, 2022.

F2: Shares subject to the option vest in four equal annual installments beginning on May 19, 2022.