Amphastar Pharmaceuticals, Inc. — Director's Dealing 2016

Mar 30, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Amphastar Pharmaceuticals, Inc. (AMPH)
CIK: 0001297184
Period of Report: 2016-03-26

Reporting Person: Zhang Jack Y. (Director, CEO & Chief Science Officer, 10% Owner)
Reporting Person: Luo Mary Z. (Director, COO, Chief Scientist, Chairman, 10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-03-26	Common Stock	F	15711	$11.96	Disposed	1114191	Direct
2016-03-27	Common Stock	F	25856	$11.96	Disposed	1088335	Direct
2016-03-26	Common Stock	F	6704	$11.96	Disposed	760962	Indirect
2016-03-27	Common Stock	F	8641	$11.96	Disposed	752321	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	7461594	Indirect
Common Stock	5000	Indirect
Common Stock	200000	Indirect

Footnotes

F1: The reported shares were withheld to satisfy the reporting person's tax liability in connection with the vesting of deferred stock units, or DSUs.

F2: The securities are held of record by Mary Z. Luo. The reporting persons are husband and wife.

F3: The securities are held of record by APCL, of which the reporting persons are the sole owners.

F4: The shares are held of record in an account for the benefit of the reporting persons' son. The reporting persons disclaim beneficial ownership of these shares, and the inclusion of these shares in this report should not be deemed an admission of beneficial ownership of any such shares for purposes of Section 16, or for any other purpose.

F5: The shares are held of record by a trust for the benefit of the reporting persons' son. The reporting persons disclaim beneficial ownership of these shares, and the inclusion of these shares in this report should not be deemed an admission of beneficial ownership of any such shares for purposes of Section 16, or for any other purpose.