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Filing Details

Accession Number:: 0001209191-15-054326
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2015-06-17 18:01:36
Reporting Period:: 2015-06-15

Filing Date:: 2015-06-17
Accepted Time:: 2015-06-17 18:01:36
SEC Url:: Form 4 Filing

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
1611156	Z. Mary Luo	C/O Amphastar Pharmaceuticals, Inc. 11570 6Th Street Rancho Cucamonga CA 91730	Coo And Chief Scientist	Yes	Yes	Yes	No
1611157	Y. Jack Zhang	C/O Amphastar Pharmaceuticals, Inc. 11570 6Th Street Rancho Cucamonga CA 91730	Ceo & Chief Science Officer	Yes	Yes	Yes	No

Reported Non-Derivative Transactions

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Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Acquisiton	2015-06-15	50,061	$12.97	961,697	No	4	M	Direct
Common Stock	Disposition	2015-06-15	45,382	$16.29	916,315	No	4	S	Direct
Common Stock	Disposition	2015-06-15	4,679	$16.29	911,636	No	4	F	Direct

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

Reported Derivative Transactions

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Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Employee Stock Option (right to buy)	Disposition	2015-06-15	50,061	$0.00	50,061	$12.97

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
8,481		2015-09-28	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	661,666	Indirect	See footnote
Common Stock	7,631,594	Indirect	See footnote
Common Stock	5,000	Indirect	See footnote
Common Stock	200,000	Indirect	See footnote

Reported Derivative Holdings

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Sec. Name	Sec. Type	Price	Date	Expiration Date	Amount	Remaning Holdings	Nature of Ownership
Common Stock	Employee Stock Option (right to buy)	$12.97		2015-09-28	8,481	8,481	Indirect

Expiration Date	Amount	Remaning Holdings	Nature of Ownership
2015-09-28	8,481	8,481	Indirect

Footnotes

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.
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.
The reported securities were withheld to satisfy the Reporting Person's tax liability in connection with the reported reported option exercise.
The securities are held of record by Mary Z. Luo. The reporting persons are husband and wife.
The shares are held of record by Applied Physics & Chemistry Laboratories, Inc., of which the reporting persons are the sole owners.
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.
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.
Shares subject to the option are fully vested and immediately exercisable.