Amphastar Pharmaceuticals, Inc. — Director's Dealing 2015

Dec 18, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Amphastar Pharmaceuticals, Inc. (AMPH)
CIK: 0001297184
Period of Report: 2015-12-16

Reporting Person: ZASLOFF MICHAEL A (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-12-16	Common Stock	M	16538	$11.68	Acquired	42863	Direct
2015-12-16	Common Stock	S	16538	$14.194	Disposed	26325	Direct
2015-12-17	Common Stock	M	14232	$11.68	Acquired	40557	Direct
2015-12-17	Common Stock	S	14232	$14.2013	Disposed	26325	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-12-16	Stock Option (right to buy)	$11.68	M	16538	Disposed	2015-12-18	Common Stock (16538)	Direct
2015-12-17	Stock Option (right to buy)	$11.68	M	14232	Disposed	2015-12-18	Common Stock (14232)	Direct

Footnotes

F1: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 10, 2015.

F2: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $14.03 to $14.37, 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 pricewithin the ranges set forth in footnotes (2) and (3) to this Form 4.

F3: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $14.02 to $14.39, inclusive.

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