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: PETERS WILLIAM J (CFO, SVP & Treasurer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-03-16	Common Stock	A	33707	—	Acquired	97730	Direct
2017-03-17	Common Stock	F	3704	$13.75	Disposed	94026	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-03-16	Employee Stock Option (right to buy)	$13.35	A	84064	Acquired	2027-03-16	Common Stock (84064)	Direct

Footnotes

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

F2: Includes 398 shares acquired under the Issuer's 2014 Employee Stock Purchase Plan on November 30, 2016.

F3: The reported shares were withheld to satisfy the reporting person's tax liability in connection with the vesting of RSUs.

F4: Shares subject to the option vest in four equal annual installments beginning on March 16, 2018.