Amphastar Pharmaceuticals, Inc. — Director's Dealing 2015

Mar 30, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Amphastar Pharmaceuticals, Inc. (AMPH)
CIK: 0001297184
Period of Report: 2015-03-26

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
2015-03-26	Common Stock	A	125418	—	Acquired	932513	Direct
2015-03-26	Common Stock	A	53511	—	Acquired	670307	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-03-26	Employee Stock Option (right to buy)	$14.95	A	767912	Acquired	2020-03-26	Common Stock (767912)	Direct
2015-03-26	Employee Stock Option (right to buy)	$14.95	A	327647	Acquired	2020-03-26	Common Stock (327647)	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	7631594	Indirect
Common Stock	5000	Indirect
Common Stock	200000	Indirect

Footnotes

F1: The reported securities are represented by deferred stock units which vest in three equal annual installments beginning on March 26, 2016.

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

F3: The shares are held of record by Applied Physics & Chemistry Laboratories, Inc., 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 disclaims 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 disclaims 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.

F6: Shares subject to the option vest in three equal annual installments beginning on March 26, 2016.