WILLIAM J. PETERS - 01 Mar 2023 Form 4 Insider Report for Amphastar Pharmaceuticals, Inc. (AMPH)

Role: CFO, EVP & Treasurer
Signature: /s/ William J. Peters
Issuer symbol: AMPH
Transactions as of: 01 Mar 2023
Net transactions value: -$274,350
Form type: 4
Filing time: 03 Mar 2023, 15:47:47 UTC
Previous filing: 10 Aug 2022
Next filing: 08 Mar 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	$124,335	+10,974	+11%	$11.33^*	111,588	01 Mar 2023	Direct	F1
transaction	AMPH	Common Stock	Sale	$398,685	-10,974	-9.8%	$36.33	100,614	01 Mar 2023	Direct	F2

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	-10,974	-55%	$0.000000	8,826	01 Mar 2023	Common Stock	10,974	$11.33	Direct	F3

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

Explanation of Responses:

Id	Content
F1	Includes 134 shares acquired under the Issuer's 2014 Employee Stock Purchase Plan on November 30, 2022.
F2	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.
F3	Shares subject to the option are fully vested and immediately exercisable.