Amphastar Pharmaceuticals, Inc. - Director's Dealing 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Amphastar Pharmaceuticals, Inc. (AMPH)
CIK: 0001297184
Period of Report: 2021-12-16

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

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-12-16	Common Stock	M	1744	$14.40	Acquired	107786	Direct
2021-12-16	Common Stock	S	1744	$22.40	Disposed	106042	Direct

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-12-16	Employee Stock Option (right to buy)	$14.40	M	1744	Disposed	2024-04-21	Common Stock (1744)	Direct

F1: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 7, 2021.

F2: Includes 353 shares acquired under the Issuer's 2014 Employee Stock Purchase Plan on November 30, 2021.

F3: Shares subject to the option are fully vested and immediately exercisable.