WILLIAM J. PETERS - 25 Feb 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: 25 Feb 2022
Net transactions value: -$311,000
Form type: 4
Filing time: 01 Mar 2022, 15:05:43 UTC
Previous filing: 09 Feb 2022
Next filing: 09 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	$343,850	+23,000	+22%	$14.95	129,042	25 Feb 2022	Direct
transaction	AMPH	Common Stock	Sale	$307,450	-11,000	-8.5%	$27.95	118,042	25 Feb 2022	Direct	F1
transaction	AMPH	Common Stock	Sale	$347,400	-12,000	-10%	$28.95	106,042	25 Feb 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	-23,000	-48%	$0.000000	25,074	25 Feb 2022	Common Stock	23,000	$14.95	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.