Rong Zhou - 20 Jun 2023 Form 4 Insider Report for Amphastar Pharmaceuticals, Inc. (AMPH)

Role: EVP, Production Center
Signature: /s/ Eva Wen, by power of attorney
Issuer symbol: AMPH
Transactions as of: 20 Jun 2023
Net transactions value: +$109,346
Form type: 4
Filing time: 21 Jun 2023, 17:05:43 UTC
Previous filing: 20 Jun 2023
Next filing: 05 Dec 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	$109,346	+9,651	+9.4%	$11.33	112,341	20 Jun 2023	Direct
holding	AMPH	Common Stock						99,668	20 Jun 2023	See footnote	F1
holding	AMPH	Common Stock						5,000	20 Jun 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	-9,651	-28%	$0.000000	24,787	20 Jun 2023	Common Stock	9,651	$11.33	Direct	F3

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

Explanation of Responses:

Id	Content
F1	The shares are held of record by the Zhou Family Trust for which the reporting person serves as a trustee.
F2	The shares are held of record by the reporting person's spouse.
F3	Shares subject to the option are fully vested and immediately exercisable.