Amphastar Pharmaceuticals, Inc. — Director's Dealing 2015

Aug 20, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Amphastar Pharmaceuticals, Inc. (AMPH)
CIK: 0001297184
Period of Report: 2015-08-17

Reporting Person: PRINS RICHARD K (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-08-17	Common Stock	M	5400	$10.77	Acquired	48122	Direct
2015-08-17	Common Stock	S	5400	$14.7008	Disposed	42722	Direct
2015-08-18	Common Stock	M	2100	$10.77	Acquired	44822	Direct
2015-08-18	Common Stock	S	9100	$14.6588	Disposed	35722	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-08-17	Stock Option (right to buy)	$10.77	M	5400	Disposed	2017-12-15	Common Stock (5400)	Direct
2015-08-18	Stock Option (right to buy)	$10.77	M	2100	Disposed	2017-12-15	Common Stock (2100)	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 $14.5625 to $14.805, 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 $14.52 to $14.885, inclusive.

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