FORM 4
[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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OMB Number: 3235-0287
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Thayer Dave A 		2. Issuer Name and Ticker or Trading Symbol

AMERICAN PACIFIC CORP [ APFC ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                      _____ 10% Owner
__ X __ Officer (give title below)      _____ Other (specify below)
VP & President-Utah Operations
(Last)          (First)          (Middle)

C/O 3883 HOWARD HUGHES PARKWAY, SUITE 700 		3. Date of Earliest Transaction (MM/DD/YYYY)

2/24/2014
(Street)

LAS VEGAS, NV 89169
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
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 Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8) 		4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4) 		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock   2/24/2014     M    5000   A $11.25   17679   (1) D    
Common Stock   2/24/2014     M    5000   A $7.15   22679   (1) D    
Common Stock   2/24/2014     M    3334   A $7.61   26013   (1) D    

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. Code
(Instr. 8) 		5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		6. Date Exercisable and Expiration Date 7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4) 		8. Price of Derivative Security
(Instr. 5) 		9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option (Right to Buy)   $6.34                      (2) 9/13/2015   Common Stock   5000     5000   D    
Stock Option (Right to Buy)   $11.25   2/24/2014     M         5000      (3) 11/3/2008   Common Stock   5000   $0.00   0   D    
Stock Option (RIght to Buy)   $7.15   2/24/2014     M         5000      (4) 11/10/2019   Common Stock   5000   $0.00   0   D    
Stock Option (Right to Buy)   $7.61   2/24/2014     M         3334      (5) 12/13/2021   Common Stock   5000   $0.00   1666   D    
Stock Option (Right to Buy)   $11.93                      (6) 12/11/2022   Common Stock   1872     1872   D    
Stock Option (Right to Buy)   $40.19                      (7) 12/10/2023   Common Stock   570     570   D    

Explanation of Responses:
( 1)  Of the amount of shares beneficially owned, 5,552 shares represent unvested awards of restricted stock, of which,2,678 shares are subject to time-vesting as follows: 547 shares vest in three equal annual installments beginning 12/10/2014, 1,131 shares vest in two equal annual installments beginning 12/11/2014, and 1,000 shares vest on 12/13/2014; and 2,874 shares are subject to vesting based upon the Company's satisfaction of certain performance objectives from 10/1/2013 through 9/30/2015.
( 2)  The option is fully exercisable, and vested in two equal annual installments beginning on 9/13/2005.
( 3)  The option is fully exercisable, and vested in three equal annual installments beginning on 11/03/2009.
( 4)  The option is fully exercisable, and vested in three equal annual installments on 11/10/2010.
( 5)  The option vests in three equal annual installments beginning on 12/13/2012.
( 6)  The option vests in three equal annual installments beginning 12/11/2013.
( 7)  The option vests in three equal annual installments beginning 12/10/2014.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Thayer Dave A
C/O 3883 HOWARD HUGHES PARKWAY
SUITE 700
LAS VEGAS, NV 89169

VP & President-Utah Operations

Signatures
Dave A. Thayer 2/24/2013
** 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 4(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 control number.
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