Richard Koo - 07 Jun 2021 Form 4 Insider Report for Amphastar Pharmaceuticals, Inc. (AMPH)

Role: Director
Signature: /s/ Eva Wen, by power of attorney
Issuer symbol: AMPH
Transactions as of: 07 Jun 2021
Transactions value $: $0
Form type: 4
Filing time: 08 Jun 2021, 20:55:10 UTC
Previous filing: 02 Jun 2021
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AMPH	Common Stock	Award	$0	+6,019	+2.4%	$0	259,289	07 Jun 2021	Direct	F1
holding	AMPH	Common Stock						10,000	07 Jun 2021	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	Stock Option (right to buy)	Award	$0	+17,182		$0	17,182	07 Jun 2021	Common Stock	17,182	$19.52	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, all of which vest on June 7, 2022.
F2	The reported shares are held directly by Richard Y. Koo, a sole proprietorship, for which the Reporting Person is the sole owner.
F3	All of the shares subject to the option vest on June 7, 2022.