Amphastar Pharmaceuticals, Inc. — Director's Dealing 2015

Jun 18, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Amphastar Pharmaceuticals, Inc. (AMPH)
CIK: 0001297184
Period of Report: 2015-06-15

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-06-15	Common Stock	M	50061	$12.97	Acquired	961697	Direct
2015-06-15	Common Stock	S	45382	$16.2938	Disposed	916315	Direct
2015-06-15	Common Stock	F	4679	$16.2938	Disposed	911636	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-06-15	Employee Stock Option (right to buy)	$12.97	M	50061	Disposed	2015-09-28	Common Stock (50061)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	661666	Indirect
Common Stock	7631594	Indirect
Common Stock	5000	Indirect
Common Stock	200000	Indirect

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Employee Stock Option (right to buy)	$12.97	2015-09-28	Common Stock (8481)	8481	Indirect

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 December 16, 2014.

F2: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.00 to $16.45, 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: The reported securities were withheld to satisfy the Reporting Person's tax liability in connection with the reported reported option exercise.

F4: The securities are held of record by Mary Z. Luo. The reporting persons are husband and wife.

F5: The shares are held of record by Applied Physics & Chemistry Laboratories, Inc., of which the reporting persons are the sole owners.

F6: 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.

F7: 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.

F8: Shares subject to the option are fully vested and immediately exercisable.