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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1297184	Amphastar Pharmaceuticals Inc.	AMPH	Pharmaceutical Preparations (2834)	330702205

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1645326	Rong Zhou	C/O Amphastar Pharmaceuticals, Inc. 11570 6Th Street Rancho Cucamonga CA 91730	Evp, Production Center	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2016-06-15	1,551	$15.85	37,137	No	4	S	Direct
Common Stock	Disposition	2016-06-15	146	$15.76	36,991	No	4	F	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Direct
No	4	F	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	99,668	Indirect	See footnote
Common Stock	5,000	Indirect	See footnote

Footnotes

The reported shares were acquired under the Issuer's 2014 Employee Stock Purchase Plan.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.82 to $15.88, 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.
The reported shares were withheld to satisfy the reporting person's tax liability in connection with the vesting of deferred stock units, or DSUs.
The shares are held of record by the Zhou Family Trust for which the reporting person serves as a trustee.
The shares are held of record by the reporting person's spouse.