WILLIAM J. PETERS - 10 Apr 2023 Form 4 Insider Report for Amphastar Pharmaceuticals, Inc. (AMPH)

Role: CFO, EVP & Treasurer, Director
Signature: /s/ William J. Peters
Issuer symbol: AMPH
Transactions as of: 10 Apr 2023
Net transactions value: -$270,864
Form type: 4
Filing time: 12 Apr 2023, 17:21:12 UTC
Previous filing: 20 Mar 2023
Next filing: 14 Apr 2023
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AMPH	Common Stock	Options Exercise	$133,927	+10,032	+9.5%	$13.35	115,180	10 Apr 2023	Direct
transaction	AMPH	Common Stock	Sale	$404,791	-10,032	-8.7%	$40.35	105,148	10 Apr 2023	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	AMPH	Employee Stock Option (right to buy)	Options Exercise	$0	-10,032	-20%	$0.000000	39,490	10 Apr 2023	Common Stock	10,032	$13.35	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 18, 2022.
F2	Shares subject to the option are fully vested and immediately exercisable.