Amphastar Pharmaceuticals, Inc. — Director's Dealing 2020

May 27, 2020

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Amphastar Pharmaceuticals, Inc. (AMPH)
CIK: 0001297184
Period of Report: 2020-05-22

Reporting Person: Lee Howard (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2020-05-22	Common Stock	M	10000	$15.11	Acquired	138081	Direct
2020-05-22	Common Stock	S	10000	$18.3639	Disposed	128081	Direct
2020-05-26	Common Stock	M	10000	$15.11	Acquired	138081	Direct
2020-05-26	Common Stock	S	10000	$18.5989	Disposed	128081	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2020-05-22	Stock Option (right to buy)	$15.11	M	10000	Disposed	2020-05-27	Common Stock (10000)	Direct
2020-05-26	Stock Option (right to buy)	$15.11	M	10000	Disposed	2020-05-27	Common Stock (10000)	Direct

Footnotes

F1: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.05 to $18.59 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 weighted average price. These shares were sold in multiple transactions at prices ranging from $18.42 to $18.94, inclusive.

F3: Shares subject to the option are fully vested and immediately exercisable.