Amphastar Pharmaceuticals, Inc. — Director's Dealing 2015

Jun 13, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Amphastar Pharmaceuticals, Inc. (AMPH)
CIK: 0001297184
Period of Report: 2015-06-05

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
2015-06-05	Common Stock	F	4831	$16.4642	Disposed	917306	Direct
2015-06-08	Common Stock	F	3046	$16.614	Disposed	914260	Direct
2015-06-09	Common Stock	F	2624	$16.2356	Disposed	911636	Direct
2015-06-10	Common Stock	M	12975	$12.97	Acquired	924611	Direct
2015-06-10	Common Stock	S	11731	$16.3792	Disposed	912880	Direct
2015-06-10	Common Stock	F	1244	$16.3792	Disposed	911636	Direct
2015-06-11	Common Stock	M	12860	$12.97	Acquired	924496	Direct
2015-06-11	Common Stock	S	11600	$16.4694	Disposed	912896	Direct
2015-06-11	Common Stock	F	1260	$16.4694	Disposed	911636	Direct
2015-06-12	Common Stock	M	83253	$12.97	Acquired	994889	Direct
2015-06-12	Common Stock	S	75618	$16.1487	Disposed	919271	Direct
2015-06-12	Common Stock	F	7635	$16.1487	Disposed	911636	Direct
2015-06-05	Common Stock	F	6173	$16.4657	Disposed	667351	Indirect
2015-06-08	Common Stock	F	3052	$16.6087	Disposed	664299	Indirect
2015-06-09	Common Stock	F	2633	$16.2339	Disposed	661666	Indirect
2015-06-10	Common Stock	M	12619	$12.97	Acquired	674285	Indirect
2015-06-10	Common Stock	S	11411	$16.3719	Disposed	662874	Indirect
2015-06-10	Common Stock	F	1208	$16.3719	Disposed	661666	Indirect
2015-06-11	Common Stock	M	12930	$12.97	Acquired	674596	Indirect
2015-06-11	Common Stock	S	11664	$16.4689	Disposed	662932	Indirect
2015-06-11	Common Stock	F	1266	$16.4689	Disposed	661666	Indirect
2015-06-12	Common Stock	M	42223	$12.97	Acquired	703889	Indirect
2015-06-12	Common Stock	S	38471	$16.1673	Disposed	665418	Indirect
2015-06-12	Common Stock	F	3752	$16.1673	Disposed	661666	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-06-10	Employee Stock Option (right to buy)	$12.97	M	12975	Disposed	2015-09-28	Common Stock (12975)	Direct
2015-06-11	Employee Stock Option (right to buy)	$12.97	M	12860	Disposed	2015-09-28	Common Stock (12860)	Direct
2015-06-12	Employee Stock Option (right to buy)	$12.97	M	83253	Disposed	2015-09-28	Common Stock (83253)	Direct
2015-06-10	Employee Stock Option (right to buy)	$12.97	M	12619	Disposed	2015-09-28	Common Stock (12619)	Indirect
2015-06-11	Employee Stock Option (right to buy)	$12.97	M	12930	Disposed	2015-09-28	Common Stock (12930)	Indirect
2015-06-12	Employee Stock Option (right to buy)	$12.97	M	42223	Disposed	2015-09-28	Common Stock (42223)	Indirect

Holdings (Non-Derivative)

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

Footnotes

F1: The reported securities were withheld to satisfy the Reporting Person's tax liability in connection with a previously reported option exercise.

F2: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the each of the reporting persons on December 16, 2014.

F3: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.25 to $16.61, inclusive. The reporting persons undertake 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 within the ranges set forth in footnotes (3), (5), (6), (8), (9) and (10) to this Form 4.

F4: The reported securities were withheld to satisfy the Reporting Person's tax liability in connection with the reported reported option exercise.

F5: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.38 to $16.62, inclusive.

F6: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.02 to $16.49, inclusive.

F7: The securities are held of record by Mary Z. Luo. The reporting persons are husband and wife.

F8: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.24 to $16.55, inclusive.

F9: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.37 to $16.61, inclusive.

F10: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.03 to $16.39, inclusive.

F11: The shares are held of record by Applied Physics & Chemistry Laboratories, Inc., of which the reporting persons are the sole owners.

F12: 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.

F13: 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.

F14: Shares subject to the option are fully vested and immediately exercisable.