Yakob Liawatidewi - Apr 10, 2023 Form 4 Insider Report for Amphastar Pharmaceuticals, Inc. (AMPH)

Role: EVP Corp Admin Center, Director
Signature: /s/ Eva Wen, by power of attorney
Stock symbol: AMPH
Transactions as of: Apr 10, 2023
Transactions value $: -$98,850
Form type: 4
Date filed: 4/12/2023, 05:22 PM
Previous filing: Mar 20, 2023
Next filing: Apr 14, 2023

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AMPH	Common Stock	Options Exercise	$101K	+5K	+7.22%	$20.23	74.2K	Apr 10, 2023	Direct
transaction	AMPH	Common Stock	Sale	-$200K	-5K	-6.74%	$40.00	69.2K	Apr 10, 2023	Direct	F1
holding	AMPH	Common Stock						2.46K	Apr 10, 2023	See footnote	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	-5K	-22.74%	$0.00	17K	Apr 10, 2023	Common Stock	5K	$20.23	Direct	F3

* 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 5, 2022.
F2	The reported shares are held of record by the Yakob and Sunmoon Trust dated July 25, 2013 for which the reporting person serves as a trustee.
F3	Shares subject to the option vest in four equal annual installments beginning on March 15, 2020.