Ownership Submission
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, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Luo Mary Z.
 2. Date of Event Requiring Statement (Month/Day/Year)
06/24/2014		 3. Issuer Name and Ticker or Trading Symbol
Amphastar Pharmaceuticals, Inc. [AMPH]
(Last)
(First)
(Middle)
C/O AMPHASTAR PHARMACEUTICALS, INC., 11570 6TH STREET		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director __X__ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
COO, Chief Scientist, COB
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

RANCHO CUCAMONGA, CA 91730		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
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 547,823
D
 
Common Stock 68,973 (1)
D
 
Common Stock 7,631,594
I
By APCL (2)
Common Stock 5,000
I
By son (3)
Common Stock 200,000
I
By son (4)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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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 of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option (Right to Buy)   (5) 08/02/2014 Common Stock 185,000 $ 22.29 D  
Stock Option (Right to Buy)   (5) 09/28/2015 Common Stock 185,000 $ 12.97 D  
Stock Option (Right to Buy)   (6) 10/03/2016 Common Stock 181,768 $ 16.75 D  
Stock Option (Right to Buy)   (7) 07/13/2017 Common Stock 264,895 $ 11.51 D  
Stock Option (Right to Buy)   (8) 09/28/2017 Common Stock 138,632 $ 11.53 D  
Stock Option (Right to Buy)   (9) 07/05/2018 Common Stock 746,181 $ 12.02 D  
Stock Option (Right to Buy)   (10) 03/27/2019 Common Stock 224,737 $ 15.84 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Luo Mary Z.
C/O AMPHASTAR PHARMACEUTICALS, INC.
11570 6TH STREET
RANCHO CUCAMONGA, CA 91730		   X   X   COO, Chief Scientist, COB  

Signatures

/s/Mary Z. Luo, by Power of Attorney 06/24/2014
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) This represents deferred stock units that were granted on 3/27/2014 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) The reporting person and Dr. Jack Y. Zhang ("Dr. Zhang"), the Chief Executive Officer and a director of the Issuer, are the sole owners of Applied Physics & Chemistry Laboratories, Inc. The reporting person and Dr. Zhang have shared voting and investment power over these shares.
(3) Shares held in an account for the benefit of the reporting person's son, Bill Luobei Zhang, who shares the reporting person's household. As such, the reporting person may be deemed to have indirect beneficial ownership of these shares. The reporting person disclaims 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.
(4) Shares held by a trust for the benefit of the reporting person's son, Bill Luobei Zhang, who shares the reporting person's household. As such, the reporting person may be deemed to have indirect beneficial ownership of these shares. The reporting person disclaims 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.
(5) This option is fully vested and exercisable.
(6) This option was granted on 10/3/2011 and vests over 3 years in equal annual installments commencing on the first anniversary of the grant date, subject to the reporting person's continued (i) employment with or service to the Issuer or subsidiary thereof and (ii) service on the Board of Directors of the Issuer, in each case through the applicable vesting date.
(7) This option was granted on 7/13/2012 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 (i) employment with or service to the Issuer or subsidiary thereof and (ii) service on the Board of Directors of the Issuer, in each case through the applicable vesting date.
(8) This option was granted on 9/28/2012 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 (i) employment with or service to the Issuer or subsidiary thereof and (ii) service on the Board of Directors of the Issuer, in each case through the applicable vesting date.
(9) This option was granted on 7/5/2013 and vests over 3 years in equal annual installments commencing on the first anniversary of the grant date, subject to the reporting person's continued (i) employment with or service to the Issuer or subsidiary thereof and (ii) service on the Board of Directors of the Issuer, in each case through the applicable vesting date.
(10) This option was granted on 3/27/2014 and vests over 3 years in equal annual installments commencing on the first anniversary of the grant date, subject to the reporting person's continued (i) employment with or service to the Issuer or subsidiary thereof and (ii) service on the Board of Directors of the Issuer, in each case through the applicable vesting date.

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