Yakob Liawatidewi - Mar 4, 2024 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: Mar 4, 2024
Transactions value $: $0
Form type: 4
Date filed: 3/6/2024, 05:54 PM
Previous filing: Aug 29, 2023
Next filing: Mar 8, 2024

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AMPH	Common Stock	Award	$0	+10.8K	+15.44%	$0.00	80.4K	Mar 4, 2024	Direct	F1
holding	AMPH	Common Stock						2.46K	Mar 4, 2024	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)	Award	$0	+22.7K		$0.00	22.7K	Mar 4, 2024	Common Stock	22.7K	$46.68	Direct	F3

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

Explanation of Responses:

Id	Content
F1	The reported shares are represented by restricted stock units, or RSUs, which vest in four equal annual installments beginning on March 4, 2025.
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	The shares subject to the option vest in four equal annual installments beginning on March 4, 2025.