Document:

EX-10.31

 Exhibit 10.31 

SEVERANCE AGREEMENT 
 This Severance
Agreement (the “Agreement”), entered into effective May 7, 2013, is between American Pacific Corporation, a Delaware corporation having its principal place of business at 3883 Howard Hughes Parkway, Suite 700, Las Vegas, Nevada
89169 (the “Company”), and Dave A. Thayer, an individual residing at the address set forth below his signature at the end of this Agreement and currently the President of AMPAC Utah Operations and Vice President of American Pacific
Corporation (“Executive”) (collectively, “the parties”). 
 1. Severance Benefits 

Unless Executive’s employment is terminated for Cause or by death or Disability (as defined below), if the Company terminates
Executive’s employment: 
 (a) The Company, in an attempt to ease Executive’s transition, and upon receipt of a mutually
satisfactory release of potential claims against the Company, shall pay Executive all compensation due and owing through the last day actually worked, and shall continue to pay to Executive, in accordance with the Company’s then effective
payroll practices, Executive’s then effective base salary (but not any employee benefits), less applicable withholding, for a period of three (3) years from the date the employment relationship with the Company terminates (the
“Termination Date”); provided, however, that such payments by the Company shall be offset, during the third year following the Termination Date, by income paid to Executive by another employer other than the Company, which income Executive
shall promptly report to the Company. For the avoidance of doubt, for purposes of this Section 1(a), base salary shall not include any perquisites or similar benefits provided to Executive prior to the Termination Date, including, without
limitation, any automobile allowance, club membership or right to use aircraft otherwise provided by the Company for the use by the Company’s executives. 

(b) If Executive elects to convert his Company group health coverage under COBRA, the Company will pay Executive’s COBRA premiums
until the earlier of (1) the eighteenth (18th) month anniversary of the Termination Date or (2) Executive becomes covered by another employer’s group health plans. 

(c) All shares of restricted stock granted to Executive, all unexercised options to purchase Company common stock and any other equity
awards of the Company, in each case that are unvested at the time of such termination of employment of Executive, shall become, immediately prior to the Termination Date, fully vested and, as applicable, exercisable. 

(d) The payments and benefits described in this Section 1 shall be conditioned upon Executive’s continued compliance with the
material obligations described in this Agreement. Should Executive violate any such obligations, as determined by the Company in good faith, all further payment obligations shall cease. 

2. Other Terminations 

(a) Termination by Company for Cause. At any time, and without prior notice, the Company may terminate Executive’s employment
for Cause (as defined below). In such case, the Company shall pay Executive all compensation then due and owing; thereafter, all of the Company’s obligations under this Agreement shall cease. Termination for “Cause” shall mean
termination of Executive’s employment because of Executive’s (i) involvement in fraud, misappropriation or embezzlement related to the business or property of the Company and/or its subsidiaries or affiliates; (ii) conviction
for, or guilty or “no contest” plea to, a felony; and/or (iii) a pattern of failure to substantially perform his duties to the Company, provided, however, that if such Cause is reasonably curable, the Company shall not terminate
Executive’s employment unless the Company first gives notice of its intention to terminate and the grounds of such termination, and Executive has not, within thirty (30) days following receipt of such notice, cured such Cause, to the
satisfaction of the Company. 
 (b) Termination by Executive. At any time, Executive may terminate his employment with the
Company for any reason, for any or no reason, by providing the Company thirty (30) days’ advance written notice. The Company shall have the option, in its complete discretion, to make such termination of employment effective at any time
prior to the end of such notice period, provided that the Company pays Executive all compensation due and owing through the last day actually worked, plus an amount equal to the then effective base salary, less applicable withholding, Executive
would have earned through the balance of the above notice period; thereafter, all of the Company’s obligations under this Agreement shall cease. 

  
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 (c) Termination by Death. If Executive shall die while still an employee of the
Company, Executive’s employment with the Company shall be deemed to have terminated upon the date of death of Executive. The Company shall pay to Executive’s beneficiaries or estate, as appropriate, compensation then due and owing as of
the date of death, and shall continue to pay Executive’s salary and benefits (to the extent consistent with the terms of the relevant benefit plan), through the second full month after Executive’s death. As of the date of death, all
unvested stock options or other equity awards granted to Executive to the date of death shall become fully vested and, as applicable, exercisable, and may be exercised by the appropriate representative of Executive’s estate. Thereafter, all
obligations of the Company under this Agreement shall cease. Nothing in this Section 2(c) shall affect any entitlement of Executive’s heirs to the benefits of any life insurance, vested funds in plans governed by provisions of state or
federal laws, including but not limited to 401(k), deferred compensation, pension, or other similar employee benefit plans. 

(d) Termination by Disability. If, in the sole opinion of the Company, Executive shall suffer a Disability (as defined below), and,
to the extent permitted by law, the Company shall terminate Executive’s employment, the Company shall pay to Executive all compensation to which Executive is entitled through the last day of the month in which Executive has been determined to
have a Disability, and, thereafter, there shall be no other obligations of the Company under this Agreement. Nothing in this Section 2(d) shall affect Executive’s rights under any disability plan in which he is a participant. For purposes
of this Agreement, “Disability” shall mean (i) Executive’s inability to engage in any substantial gainful activity by reason of any medically determinable physical or mental impairment which can be expected to result in death or
can be expected to last for a continuous period of not less than twelve (12) months, or (ii) Executive’s receipt, by reason of any medically determinable physical or mental impairment which can be expected to result in death or can be
expected to last for a continuous period of not less than twelve (12) months, of income replacement benefits for a period of not less than three (3) months under an accident and health plan covering employees of the Company. 

3. Termination of Employment Following Corporate Transition 

(a) Corporate Transition Defined. For purposes of this Agreement, a “Corporate Transition” shall include any of the
following transactions to which the Company is a party: (A) a merger or consolidation in which the Company is not the surviving entity and securities representing more than fifty percent (50%) of the total combined voting power of the
Company’s outstanding securities are transferred to a holder different from those who held such securities immediately prior to such merger; (B) the sale, transfer or other disposition of all or substantially all of the assets of the
Company in liquidation or dissolution of the Company; (C) any reverse merger in which the Company is the surviving entity but in which securities representing more than fifty percent (50%) of the total combined voting power of the
Company’s outstanding securities are transferred to a holder(s) different from those who held such securities immediately prior to such merger; or (D) any cash dividend paid by the Company that, in the aggregate with all other dividends
paid in any twelve month period, is greater than the combined earnings of the Company for the Company’s two fiscal years prior to such dividend payment date. In addition, a Corporate Transition shall also include a “Change in Control”
as such term is defined in the Company’s 2008 Stock Incentive Plan. None of the foregoing events, however, shall be considered a Corporate Transition under this Agreement unless the event also qualifies as a change in the ownership or effective
control of the Company, or a change in the ownership of a substantial portion of the assets of the Company, under Section 409A(a)(2)(A)(v) of the Internal Revenue Code of 1986, as amended, the regulations thereunder, and any other published
interpretive authority, as issued or amended from time to time. Except as provided otherwise in this Section 3, in the event of a Corporate Transition, the provisions of Section 1 and Section 2(b) above shall not apply. 

(b) Acceleration of Vesting at Time of Corporate Transition. Should a Corporate Transition take place, all unvested shares of
restricted stock granted to Executive, all unvested and unexercised options to purchase Company stock granted to Executive, and all other unvested equity awards under the 2008 Stock Incentive Plan or similar employee benefit plan, in each case at
the time of the Corporate Transition, shall become, immediately prior to such Corporate Transition, fully vested and, as applicable, exercisable. 

  
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 (c) Severance Benefits in the Event of Termination Following Corporate Transition. In
the event of Executive’s termination, other than for Cause or by death or Disability, following a Corporate Transition, and upon receipt of a mutually satisfactory release of potential claims against the Company and any successor, Executive
shall be entitled to the payments and benefits described in Sections 1(a) and 1(b) above. Such payments and benefits shall be conditioned upon Executive’s continued compliance with the material obligations described in this Agreement.
Should Executive violate any such obligations, as determined by the Company in good faith, all further obligations shall cease. 
 4.
Termination Obligations 
 (a) Return of Company’s Property. Executive hereby acknowledges and agrees that all personal
property, including, without limitation, all books, manuals, records, reports, notes, contracts, lists, blueprints, and other documents, or materials, or copies thereof, and equipment, furnished to or prepared by Executive in the course of or
incident to Executive’s employment, belong to the Company and shall be promptly returned to the Company upon termination of Executive’s employment. 

(b) Representations and Warranties Survive Termination of Employment. The representations and warranties contained herein shall
survive termination of Executive’s employment and expiration of this Agreement. 
 (c) Cooperation in Pending Work.
Following termination of Executive’s employment with the Company for any reason, Executive shall fully cooperate with the Company in all matters relating to the winding up of pending work on behalf of the Company and the orderly transfer of
work to other employees of the Company. Executive shall also cooperate in the defense of any litigation, whether judicial or administrative, brought by any third party against the Company that relates in any way to Executive’s knowledge, acts
or omissions or duties while employed by the Company. If Executive’s cooperation in the defense of any such action requires more than ten (10) hours of Executive’s time, Executive and the Company shall agree on appropriate
remuneration for Executive’s time and expenses. 
 (d) Post-Employment Obligations. Executive acknowledges and agrees that during
his employment with the Company, he has had, and will have, access to Confidential Information (as defined below) and the activities forbidden by this subsection would necessarily involve the improper use and disclosure of this Confidential
Information. 
 (1) To forestall this use or disclosure, Executive agrees that during the period described in Section 1(a) or
Section 3(c) when payments to Executive are being made, or for two years after the termination of Executive for Cause or by Disability, Executive shall not, directly or indirectly, (i) divert or attempt to divert from the Company (or any
affiliate thereof) any business of any kind in which the Company (or any affiliate thereof) is engaged at the time the Executive’s employment terminates; or (ii) employ or recommend for employment any person employed by the Company (or any
affiliate thereof), unless Executive can prove that any of the above actions was done without the use of Confidential Information. 
 (2) In
addition to the above restrictions on competitive activity, and regardless of whether any use of Confidential Information is involved, Executive agrees that during the payment period referred to in Section 1(a) or 3(c) Executive shall not,
directly or indirectly, (i) solicit any Customer of the Company (or any affiliate thereof) known to Executive (while he was employed by the Company) to have been a Customer with respect to products offered by the Company; or (ii) solicit
for employment any person employed by the Company (or any affiliate thereof). For purposes of this subsection (d)(2) “Customer” shall mean a person or entity that within the twelve months immediately preceding Executive’s termination
of employment, purchased or placed orders for a product made or to be made by the Company, having an aggregate price for a single product of greater than $2,000,000. 

(e) Restriction on Use of Proprietary and Confidential Information. Following termination of employment with the Company for any
reason, Executive shall neither, directly or indirectly, use any Proprietary Information (as defined below) nor disclose any Confidential Information (as defined below), except as expressly and specifically authorized in writing by the Company. The
disclosure or publication, whether to an individual employed by the Company or not, of any Proprietary Information, through literature, speeches or discussion, must be approved in advance in writing by the Company. 

  
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 (f) Proprietary and Confidential Information Defined. “Proprietary
Information” is all information and any idea in whatever form, tangible or intangible, pertaining in any manner to the business of the Company and its subsidiaries and affiliates, or any of their employees, clients, consultants, or business
associates, which was produced by any employee of the Company or its subsidiaries or affiliates, in the course of his employment or otherwise produced or acquired by or on behalf of the Company or its subsidiaries or affiliates. All Proprietary
Information not generally known outside of the Company’s organization, and all Proprietary Information so known only through improper means, shall be deemed “Confidential Information.” Without limiting the foregoing definition,
Proprietary and Confidential Information shall include, but not be limited to: (i) formulas, teaching and development techniques, processes, trade secrets, computer programs, electronic codes, inventions, improvements, and research projects;
(ii) information about costs, profits, markets, and sales; (iii) customer lists, records of customer services, usages and requirements, sketches and diagrams of the Company’s or customers’ facilities, and similar records;
(iv) business, marketing, and strategic plans; and (v) employee personnel files and compensation information. All information disclosed to Executive or to which Executive obtains access during Executive’s employment with the Company,
or to which Executive obtains access by reason of his employment by the Company, that Executive has a reasonable basis to believe is or may be Confidential Information, shall be presumed to be Confidential Information. Executive should consult any
Company procedures instituted to identify and protect certain types of Confidential Information, which are considered by the Company to be safeguards in addition to the protection provided by this Agreement. Nothing contained in those procedures or
in this Agreement is intended to limit the effect of the other. 
 5. 409A Provisions 

This Agreement is intended to comply with the provisions of Section 409A of the Internal Revenue Code of 1986, as amended (the
“Code”), and shall be construed accordingly; provided, however, that the Company makes no representation that the amounts or benefits payable under this Agreement will comply with Code Section 409A and makes no undertaking to prevent
Code Section 409A from applying to any amounts or benefits payable under this Agreement, or to mitigate its effects on any amounts or benefits payable under this Agreement. The payment of any amounts or benefits under this Agreement shall be
delayed to the extent necessary to comply with Section 409A(a)(2)(B)(i) of the Code (relating to payments made to certain “specified employees” of certain publicly-traded companies) and in such event, any such amount to which
Executive would otherwise be entitled during the six (6) month period immediately following his termination of employment will be paid on the first business day following the expiration of such six (6) month period. For all purposes under
this Agreement, “Termination Date”, “termination of employment” and “terminate(s)” shall mean the occurrence of a “separation from service” as that term is defined in Code Section 409A(a)(2)(A)(i) and
Treas. Regs. Section 1.409A-1(h), and as amplified by any other official guidance. 
 6. Notices 

All notices or other communications required or permitted hereunder shall be made in writing and shall be deemed to have been duly given if
delivered by hand or mailed, postage prepaid, by certified or registered mail, return receipt requested, and addressed to the Company: 
 American Pacific
Corporation 
 Attention: Chief Executive Officer 
 3883 Howard
Hughes Parkway, Suite 700 
 Las Vegas, Nevada 89169 
 and
addressed to Executive at Executive’s address as set forth on the signature page to this Agreement. 
 Executive and the Company shall
be obligated to notify the other party of any change in address. Notice of a change of address shall be effective only when made in accordance with this Section 6. 

  
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 7. Entire Agreement 

This Agreement is intended to be the final, complete, and exclusive statement of the terms of Executive’s rights to severance from the
Company, and specifically supersedes that certain Notice of Eligibility to the Executive dated January 24, 2007, with respect to the Ampac Fine Chemicals LLC Severance Pay Plan. Except for any stock option agreements, this Agreement supersedes
all other prior and contemporaneous agreements and statements pertaining in any manner to its subject matter and it may not be contradicted by evidence of any prior or contemporaneous statements or agreements. To the extent that the practices,
policies, or procedures of the Company, now or in the future, apply to Executive and are inconsistent with the terms of this Agreement, the provisions of this Agreement shall control. 

8. Amendments, Waivers 

This Agreement and the terms and conditions herein may not be modified, amended, or waived except by an instrument in writing, signed by
Executive and by the Company’s Chief Executive Officer pursuant to authorization of the Board of Directors or the Corporate Governance Committee thereof (or such other committee of the Board of Directors acting as the compensation committee of
the Board of Directors). No failure to exercise and no delay in exercising any right, remedy, or power under this Agreement shall operate as a waiver thereof, nor shall any single or partial exercise of any right, remedy, or power under this
Agreement preclude any other or further exercise thereof, or the exercise of any other right, remedy, or power provided herein or by law or in equity. 

9. Assignment; Successors and Assigns 

Executive agrees that he will not assign, sell, transfer, delegate or otherwise dispose of, whether voluntarily or involuntarily, or by
operation of law, any rights or obligations under this Agreement, nor shall Executive’s rights be subject to encumbrance or the claims of creditors. Any purported assignment, transfer, or delegation shall be null and void. Nothing in this
Agreement shall prevent the consolidation of the Company with, or its merger into, any other corporation or other legal entity, or the sale by the Company of all or substantially all of its properties or assets, or the assignment by the Company of
this Agreement and the performance of its obligations hereunder to any successor in interest. In the event of a change in ownership or control of the Company, the terms of this Agreement will remain in effect and shall be binding upon any successor
in interest. Notwithstanding and subject to the foregoing, this Agreement shall be binding upon and shall inure to the benefit of the parties and their respective heirs, legal representatives, successors, and permitted assigns, and shall not benefit
any person or entity other than those enumerated above. 
 10. Severability; Enforcement 

If any provision of this Agreement, or the application thereof to any person, place, or circumstance, shall be held by a court of competent
jurisdiction to be invalid, unenforceable, or void, the remainder of this Agreement and such provisions as applied to other persons, places, and circumstances shall remain in full force and effect. 

11. Governing Law 
 The
validity, interpretation, enforceability, and performance of this Agreement shall be governed by and construed in accordance with the law of the State of Nevada. 

12. Arbitration 
 Any
claim or controversy between Executive and the Company or its successor arising under or in connection with this Agreement shall be settled by arbitration in accordance with the then current Employment Dispute Resolution Rules of the American
Arbitration Association and shall be the exclusive remedy for all arbitrable claims. The Company and Executive agree that arbitration shall be held in or near Clark County, Nevada, before an arbitrator licensed to practice law in the State of
Nevada. The arbitrator shall have authority to award or grant legal, equitable, and declaratory relief. Such arbitration shall be final and binding on the parties. The Federal Arbitration Act shall govern the interpretation and enforcement of this
section pertaining to arbitration. 
 This Agreement to arbitrate shall survive termination of Executive’s employment with the Company.

 In any dispute arising under or in connection with this Agreement, the prevailing party shall be entitled to recover all costs and
reasonable attorney’s fees. 

  
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 In the event Executive elects to file suit over a dispute covered by this Section 12, the
Company shall have the option to seek an order from any court of competent jurisdiction, or proceed to defend the case filed by Executive, who agrees herein to waive trial by jury and proceed to a trial by judge without jury. 

13. Acknowledgment of Parties 

The parties acknowledge (a) that they have consulted with or have had the opportunity to consult with independent counsel of their own
choice concerning this Agreement, and (b) that they have read and understand the Agreement, are fully aware of its legal effect, and have entered into it freely based on their own judgment and not on any representations or promises other than
those contained in this Agreement. 
 14. Execution of Agreement 

This Agreement may be signed by the parties hereto in counterparts, each of which shall be deemed an original and all of which, together, shall
constitute one and the same agreement. 
 IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the day and year first
above written. 
  

	
	 AMERICAN PACIFIC
 CORPORATION

	
	 /s/ JOSEPH CARLEONE

	Name:   Joseph Carleone
	Title:     Chairman, President and CEO
	
	 /s/ DAVE A. THAYER

	Name:      Dave A. Thayer
	Address:   P. O. Box 1102
	                 Parowan, UT 84761

  
 6EX-10.32

 Exhibit 10.32 

THIRD AMENDMENT TO 

AMPAC FINE CHEMICALS LLC PENSION PLAN 

FOR BARGAINING UNIT EMPLOYEES 
 The Ampac
Fine Chemicals LLC Pension Plan for Bargaining Unit Employees is hereby amended as follows: 
 Appendix A is amended to read as follows effective
June 16, 2013: 
 APPENDIX A 
  

			
	EMPLOYEE UNIT:	  	Ampac Fine Chemicals LLC
		  	Sacramento, California
		  	International Association of Machinists &
		  	Aerospace Workers, Local #946

 BENEFIT FACTOR: 
  

					
	 Date of Last Employment

in Employee Unit
	  	Benefit Factor	 
	 On or after December 1, 2005

And before June 15, 2007
	  	$	53.00	  
	 On or after June 15, 2007

And before June 15, 2011
	  	$	58.00	  
	 On or after June 15, 2011

And before June 15, 2012
	  	$	61.00	  
	 On or after June 15, 2012

And before June 16, 2013
	  	$	63.00	  
	 On or after June 16, 2013
	  	$	66.00	  

 IN WITNESS WHEREOF, American Pacific Corporation has caused this instrument to be executed this 1st day of July, 2013. 

  
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		 		 	American Pacific Corporation
				
	ATTEST: (SEAL)	 		 	By:	 	/s/ JOSEPH CARLEONE
		 		 		 	
		 		 		 	

  
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