SEC FORM 3

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Gerst Diane G.

(Last)

(First)

(Middle)

C/O AMPHASTAR PHARMACEUTICALS, INC.

11570 6TH STREET

(Street)

RANCHO CUCAMONGA

91730

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
06/24/2014

3. Issuer Name and Ticker or Trading Symbol
Amphastar Pharmaceuticals, Inc. [ AMPH ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	Corp. Sr. VP of Quality Assur.

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	4,728	D
Common Stock	8,080⁽¹⁾	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
Stock Option (Right to Buy)	⁽²⁾	07/28/2014	Common Stock	10,000	$14.8	D
Stock Option (Right to Buy)	⁽²⁾	05/15/2015	Common Stock	9,782	$14.8	D
Stock Option (Right to Buy)	⁽²⁾	05/15/2015	Common Stock	218	$14.8	D
Stock Option (Right to Buy)	⁽²⁾	12/21/2016	Common Stock	4,000	$30.57	D
Stock Option (Right to Buy)	⁽²⁾	12/21/2016	Common Stock	1,000	$30.57	D
Stock Option (Right to Buy)	⁽²⁾	12/30/2017	Common Stock	8,767	$31.65	D
Stock Option (Right to Buy)	⁽²⁾	12/30/2017	Common Stock	5,233	$31.65	D
Stock Option (Right to Buy)	⁽²⁾	08/28/2018	Common Stock	2,522	$35.32	D
Stock Option (Right to Buy)	⁽²⁾	08/28/2018	Common Stock	8,478	$35.32	D
Stock Option (Right to Buy)	⁽³⁾	08/05/2019	Common Stock	3,500	$20.26	D
Stock Option (Right to Buy)	⁽⁴⁾	08/05/2019	Common Stock	8,500	$20.26	D
Stock Option (Right to Buy)	⁽⁵⁾	03/08/2021	Common Stock	9,000	$11.41	D
Stock Option (Right to Buy)	⁽⁶⁾	03/08/2021	Common Stock	6,000	$11.41	D
Stock Option (Right to Buy)	⁽⁷⁾	12/22/2021	Common Stock	4,954	$14.23	D
Stock Option (Right to Buy)	⁽⁸⁾	12/22/2021	Common Stock	10,046	$14.23	D
Stock Option (Right to Buy)	⁽⁹⁾	11/07/2022	Common Stock	6,183	$10.48	D
Stock Option (Right to Buy)	⁽¹⁰⁾	11/07/2022	Common Stock	13,817	$10.48	D
Stock Option (Right to Buy)	⁽¹¹⁾	07/30/2023	Common Stock	8,223	$10.93	D
Stock Option (Right to Buy)	⁽¹²⁾	07/30/2023	Common Stock	19,777	$10.93	D
Stock Option (Right to Buy)	⁽¹³⁾	04/14/2024	Common Stock	11,775	$14.4	D

Explanation of Responses:

1. This represents deferred stock units that were granted on 4/14/2014 and vest over 4 years in equal annual installments commencing on the first anniversary of the grant date, subject to the reporting person's continued employment with or service to the Issuer or subsidiary thereof through the applicable vesting date.

2. This option is fully vested and exercisable.

3. This option was granted on 8/5/2009 and vests over 5 years in equal annual installments commencing on the first anniversary of the grant date, subject to the reporting person's continued employment with or service to the Issuer or subsidiary thereof through the applicable vesting date.

4. This option was granted on 8/5/2009 and vests over 5 years in equal annual installments commencing on the first anniversary of the grant date, subject to the reporting person's continued employment with or service to the Issuer or subsidiary thereof through the applicable vesting date.

5. This option was granted on 3/8/2011 and vests over 5 years in equal annual installments commencing on the first anniversary of the grant date, subject to the reporting person's continued employment with or service to the Issuer or subsidiary thereof through the applicable vesting date.

6. This option was granted on 3/8/2011 and vests over 5 years in equal annual installments commencing on the first anniversary of the grant date, subject to the reporting person's continued employment with or service to the Issuer or subsidiary thereof through the applicable vesting date.

7. This option was granted on 12/22/2011 and vests over 4 years in equal annual installments commencing on the first anniversary of the grant date, subject to the reporting person's continued employment with or service to the Issuer or subsidiary thereof through the applicable vesting date.

8. This option was granted on 12/22/2011 and vests over 4 years in equal annual installments commencing on the first anniversary of the grant date, subject to the reporting person's continued employment with or service to the Issuer or subsidiary thereof through the applicable vesting date.

9. This option was granted on 11/7/2012 and vests over 4 years in equal annual installments commencing on the first anniversary of the grant date, subject to the reporting person's continued employment with or service to the Issuer or subsidiary thereof through the applicable vesting date.

10. This option was granted on 11/7/2012 and vests over 4 years in equal annual installments commencing on the first anniversary of the grant date, subject to the reporting person's continued employment with or service to the Issuer or subsidiary thereof through the applicable vesting date.

11. This option was granted on 7/30/2013 and vests over 4 years in equal annual installments commencing on the first anniversary of the grant date, subject to the reporting person's continued employment with or service to the Issuer or subsidiary thereof through the applicable vesting date.

12. This option was granted on 7/30/2013 and vests over 4 years in equal annual installments commencing on the first anniversary of the grant date, subject to the reporting person's continued employment with or service to the Issuer or subsidiary thereof through the applicable vesting date.

13. This option was granted on 4/14/2014 and vests over 4 years in equal annual installments commencing on the first anniversary of the grant date, subject to the reporting person's continued employment with or service to the Issuer or subsidiary thereof through the applicable vesting date.

	/s/Diane G. Gerst, by Power of Attorney	06/24/2014
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.