Amphastar Pharmaceuticals, Inc. — Director's Dealing 2016

Jun 14, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Amphastar Pharmaceuticals, Inc. (AMPH)
CIK: 0001297184
Period of Report: 2016-06-09

Reporting Person: PRINS RICHARD K (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-06-09	Common Stock	A	6086	$0.00	Acquired	29086	Direct
2016-06-13	Common Stock	M	7500	$14.23	Acquired	36586	Direct
2016-06-13	Common Stock	S	7500	$15.9381	Disposed	29086	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-06-09	Stock Option (right to buy)	$16.43	A	25827	Acquired	2021-06-09	Common Stock (25827)	Direct
2016-06-13	Stock Option (right to buy)	$14.23	M	7500	Disposed	2016-12-10	Common Stock (7500)	Direct

Footnotes

F1: The reported shares are represented by restricted stock units, or RSUs, all of which vest on June 9, 2017.

F2: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.88 to $15.99, 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.

F3: All of the shares subject to the option vest on June 9, 2017.

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