Amphastar Pharmaceuticals, Inc. — Director's Dealing 2017

Mar 21, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Amphastar Pharmaceuticals, Inc. (AMPH)
CIK: 0001297184
Period of Report: 2017-03-16

Reporting Person: Zhang Jack Y. (Director, CEO & Chief Scientific 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
2017-03-16	Common Stock	A	156554	—	Acquired	1244889	Direct
2017-03-17	Common Stock	F	23108	$13.75	Disposed	1221781	Direct
2017-03-16	Common Stock	A	67415	—	Acquired	819736	Indirect
2017-03-17	Common Stock	F	9951	$13.75	Disposed	809785	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-03-16	Employee Stock Option (right to buy)	$14.69	A	490477	Acquired	2025-03-16	Common Stock (490477)	Direct
2017-03-16	Employee Stock Option (right to buy)	$14.69	A	211213	Acquired	2025-03-16	Common Stock (211213)	Indirect

Holdings (Non-Derivative)

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

Footnotes

F1: The reported shares are represented by restricted stock units, or RSUs, which vest in three equal annual installments beginning on March 16, 2018.

F2: The reported shares were withheld to satisfy the reporting person's tax liability in connection with the vesting of RSUs.

F3: The securities are held of record by Mary Z. Luo. The reporting persons are husband and wife.

F4: The shares are held of record by APCL, of which the reporting persons are the sole owners.

F5: 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.

F6: 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.

F7: Shares subject to the option vest in three equal annual installments beginning on March 16, 2018.