WILLIAM J. PETERS - 07 Mar 2022 Form 4 Insider Report for Amphastar Pharmaceuticals, Inc. (AMPH)

Role: CFO, EVP & Treasurer
Signature: /s/ William J. Peters
Issuer symbol: AMPH
Transactions as of: 07 Mar 2022
Net transactions value: -$208,416
Form type: 4
Filing time: 09 Mar 2022, 15:06:12 UTC
Previous filing: 01 Mar 2022
Next filing: 17 Mar 2022
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	$173,897	+13,026	+12%	$13.35	119,068	07 Mar 2022	Direct
transaction	AMPH	Common Stock	Sale	$382,313	-13,026	-11%	$29.35	106,042	07 Mar 2022	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	-13,026	-18%	$0.000000	59,522	07 Mar 2022	Common Stock	13,026	$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 June 7, 2021.
F2	Shares subject to the option are fully vested and immediately exercisable.