Amphastar Pharmaceuticals, Inc. — Director's Dealing 2021

May 18, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Amphastar Pharmaceuticals, Inc. (AMPH)
CIK: 0001297184
Period of Report: 2021-05-14

Reporting Person: Liawatidewi Yakob (SVP Corp Admin Center)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-05-14	Common Stock	S	3186	$19.9164	Disposed	53573	Direct
2021-05-17	Common Stock	M	9637	$11.33	Acquired	63210	Direct
2021-05-17	Common Stock	S	9637	$19.9944	Disposed	53573	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-05-17	Empoyee Stock Option (right to buy)	$11.33	M	9637	Disposed	2026-03-17	Common Stock (9637)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	2459	Indirect

Footnotes

F1: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.89 to $19.93, inclusive.The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1) and (2) to this Form 4.

F2: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.98 to $20.063, inclusive.

F3: 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.

F4: Shares subject to the option are fully vested and immediately exercisable.