APFC American Pacific Corp. (MM)

Notes to the Financial Statements

Note 1. Plan Description

The following description of the American Pacific Corporation 401(k) Plan (the “Plan”) provides only general information. Participants should refer to the Plan document, as restated, for a complete description of the Plan’s provisions.

General: The Plan is a defined contribution plan open to domestic employees of American Pacific Corporation (the “Company” and “AMPAC”) and its subsidiaries who are not members of a collective bargaining unit. Employees are eligible to participate after completing at least 3 months of service and are allowed to enter the Plan on the first day of each fiscal quarter. The Plan is subject to the provisions of the Employee Retirement Income Security Act of 1974, as amended (“ERISA”). See Note 9.

Contributions: Each year, participants may contribute up to the maximum allowed by the Internal Revenue Code (“IRC”). In addition, the Plan allows for catch up contributions by employees 50 years and older. Participants may also contribute amounts representing distributions from other qualified plans, as defined in the Plan’s provisions. For the year ended September 30, 2013 there were no employee rollover contributions.

The Company, at its discretion, may contribute to the Plan. The Company expanded its matching contributions to include all eligible domestic employees of the Company hired on or after July 1, 2010. No changes in matching elections were made for employees hired prior to July 1, 2010. These matching contributions equal 100% of participant contributions, up to the first 3% of participant compensation, and 50% of participant contributions, up to the next 3% of participant compensation. For the year ended September 30, 2013, the Company made matching contributions of $560,885, net of forfeitures used to reduce Company contributions of $33,814.

The Company, at its discretion, may also contribute a non-elective contribution to the Plan. Eligible employees must have worked 1000 hours during the Plan year and must be employed on the last day of the Plan year to be eligible to received employer non-elective contributions. For the year ended September 30, 2013, the Company did not make employer non-elective contributions.

Participants direct the investment of their contributions, Company discretionary matching contributions and non-elective contributions into various investment options offered by the Plan. The Plan currently offers various mutual funds and employer stock as investment options for participants. See Note 9.

Participant accounts: Each participant’s account is credited with the participant’s contributions; including amounts rolled over from other qualified plans, allocations of the Company’s discretionary matching contribution, the Company’s discretionary non-elective contribution, Plan earnings, and is charged with benefit payments and an allocation of administrative expenses (loan and withdrawal fees). The allocations above are based on participant earnings or account balances, as defined. The benefit to which a participant is entitled is the benefit that can be provided from the participant’s vested accounts.

Vesting: Participants are immediately vested in their contributions, rollover contributions and employer matching contributions, plus actual earnings thereon. Vesting in the Company’s discretionary non-elective contribution is based on years of continuous service. A participant vests 20% per year from years two through six of credited service. A participant’s interest in the Plan becomes fully vested if employment terminates due to death, total and permanent disability or retirement at age 65.

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American Pacific Corporation 401(k) Plan

Notes to the Financial Statements

Note 1. Plan Description (Continued)

Notes receivable from participants: In accordance with the provisions of the Plan, participants may borrow from their fund accounts a minimum of $1,000 up to a maximum amount equal to the lesser of $50,000 or 50% of their vested account balance. Loan transactions are treated as transfers between participant-directed investments and notes receivable from participants. Loan terms range from one to five years or up to twenty years for the purchase of a primary residence. The loans are collateralized by the participant’s vested balance in the Plan and bear interest at the prime rate plus 1%. Principal and interest is paid ratably through payroll deductions. Outstanding notes receivable from participants totaled $874,709 and $792,574 at September 30, 2013 and 2012, respectively. Interest rates on participant loans are 4.25% at September 30, 2013 and ranged from 4.25% to 6.25% at September 30, 2012. Notes receivable mature from December 2013 through November 2029.

Payment of benefits: Upon termination of service, if the vested value of a participant’s account is less than $1,000, his or her account will be distributed in a single lump-sum payment. If the vested value of a participant’s account exceeds $1,000, he or she may elect to (i) receive a lump-sum amount or substantially equal payments for a specified term, (ii) elect to have all of the distribution paid in a direct rollover to another qualified plan, or (iii) a combination of the above.

Transfer of assets : During the year ended September 30, 2013, assets of $86,894 were transferred from the Ampac Fine Chemicals LLC Bargaining Unit 401(k) Plan for former union employees who became non-union employees.

Forfeited accounts: At September 30, 2013 and 2012, forfeited accounts totaled $0. Forfeited accounts are utilized first to reduce Plan expenses. Any remaining forfeitures are used to reduce employer contributions. Forfeitures of $70,255 were used to reduce Plan expenses or to reduce employer contributions during the year ended September 30, 2013.

Note 2. Summary of Significant Accounting Policies

Basis of accounting: The Plan’s financial statements are prepared on the accrual basis of accounting.

Use of estimates in the preparation of financial statements: The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amount of assets, liabilities, and changes therein, and disclosure of contingent assets and liabilities. Actual results could differ from those estimates.

Investment valuation and income recognition: Investments are reported at fair value. Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Plan management determines the Plan’s valuation policies utilizing information provided by the investment custodian. See Note 4 for discussion of fair value measurements.

Purchases and sales of securities are recorded on a trade-date basis. Interest income is recorded on the accrual basis. Dividends are recorded on the ex-dividend date. Net appreciation or depreciation includes the Plan’s gains and losses on investments bought and sold as well as held during the year.

Notes receivable from participants: Notes receivable from participants are measured at their unpaid principal balance plus any accrued but unpaid interest. Delinquent participant loans are classified as distributions based upon the terms of the Plan document.

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American Pacific Corporation 401(k) Plan

Notes to the Financial Statements

Note 2. Summary of Significant Accounting Policies (Continued)

Payment of benefits: Benefits are recorded when paid.

Expenses: Administrative expenses of the Plan are paid by either the Plan or the Company, as provided in the Plan document.

Income taxes: Management evaluated the Plan’s tax positions and concluded that the Plan had maintained its tax exempt status and had taken no uncertain tax positions that require adjustment to the financial statements. Therefore, no provision or liability for income taxes has been included in the financial statements. With few exceptions, the Plan is no longer subject to income tax examinations by the U.S. federal, state, or local tax authorities for years before 2009.

Accounting pronouncements adopted: In May 2011, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2011-04, Amendments to Achieve Common Fair Value Measurements and Disclosure Requirements in U.S. GAAP and IFRSs. ASU 2011-04 amended Accounting Standards Codification (ASC) 820, Fair Value Measurement . This update changes certain fair value measurement principles and enhances the disclosure requirements particularly for Level 3 fair value measurements. The amendments are to be applied prospectively and are effective for annual periods beginning after December 15, 2011. See Note 4 for effect of adoption.

New accounting pronouncements: In October 2012, the FASB issued ASU 2012-04, Technical Corrections and Improvements . The amendments in this update cover a wide range of Topics in the ASC, including plan accounting. These amendments include technical corrections and improvements to the ASC and conforming amendments related to fair value measurements. The amendments in this update will generally be effective for fiscal periods beginning after December 15, 2013, for non-public entities, except for amendments in this update where there was no transition guidance which were immediately effective upon issuance. The adoption of immediately effective amendments was not significant to these financials. The impact of adopting ASU 2012-04 on subsequent periods is not expected to be significant.

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American Pacific Corporation 401(k) Plan

Notes to the Financial Statements

Note 3. Investments (Continued)

The Plan’s investments including gains and losses on investments bought and sold, as well as held during the year, appreciated (depreciated) in value during the year ended September 30, 2013 as follows:

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American Pacific Corporation 401(k) Plan

Notes to the Financial Statements

Note 4. Fair Value Measurements

The framework for measuring fair value provides a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (level 1 measurement) and the lowest priority to unobservable inputs (level 3 measurement). The three levels of the fair value hierarchy under the new guidance are described below:

The asset’s or liability’s fair value measurement level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Valuation techniques used need to maximize the use of observable inputs and minimize the use of unobservable inputs.

Following is a description of the valuation methodologies used for assets measured at fair value. There have been no changes in the methodologies used at September 30, 2013 and 2012.

Fixed annuity : Valued based on method outlined in the annuity contract, as calculated by the annuity provider, based on observable inputs through the review of existing contracts and readily available financial information available on the websites of the issuing financial institutions.

Registered investment companies: Valued at the net asset value (NAV) of shares held by the plan at year end.

American Pacific Corporation common stock : Valued at trade prices that are determined by real trading executed for the Plan during market hours. The trade price may be derived from a single trade or may be an average of several trades executed for the Plan and is adjusted for commissions and applicable SEC fees.

The methods described above may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, while the Plan believes its valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date.

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American Pacific Corporation 401(k) Plan

Notes to the Financial Statements

To assess the appropriate classification of investments within the fair value hierarchy, the availability of market data is monitored. Changes in economic conditions or valuation techniques may require the transfer of investments from one fair value level to another. In such instances, the transfer is reported at the beginning of the reporting period.

The Plan evaluates the significance of transfers between levels based upon the nature of the investment and size of the transfer relative to total net assets available for benefits. For the year ended September 30, 2013, there were no significant transfers in or out of Levels 1, 2, or 3.

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American Pacific Corporation 401(k) Plan

Notes to the Financial Statements

Note 5. Plan Termination

Although it has not expressed any intention to do so, the Company has the right under the Plan to discontinue its contributions at any time and to terminate the Plan subject to the provisions set forth in ERISA. In the event of Plan termination, participants would become 100% vested in their account.

Note 6. Income Tax Status

The Plan was adopted from a non-standardized prototype plan document offered by Great-West Trust Company, LLC. The IRS has determined and informed the prototype sponsor by a letter dated November 27, 2001 that the prototype plan is designed in accordance with applicable sections of the Internal Revenue Code (“IRC”).

The Plan has received a determination letter from the IRS dated April 27, 2011 indicating that the Plan as adopted is designed in accordance with the IRC. The Plan administrator and the Plan’s management believe that the Plan is designed and is currently being operated in compliance with the applicable requirements of the IRC and the related trust was exempt from taxation as of the financial statement date.

Note 7. Exempt Party-In-Interest Transactions

Certain Plan investments are shares of mutual funds managed by Great-West Trust Company, LLC or its affiliates. Great-West Trust Company, LLC is the trustee as defined by the Plan and, therefore, these transactions qualify as party-in-interest transactions. Fees paid by the Plan to Great-West Trust Company, LLC totaled $8,229 for the year ended September 30, 2013.

At September 30, 2013 and 2012, the Plan held 129,746 and 184,724 shares of common stock of the Company, respectively, with a fair value of $7,104,878 and $2,200,064, respectively. At September 30, 2013 and 2012, the Plan held 9 and 538 units in the Employer Stock Awaiting Purchase Fund, respectively, with a fair value of $9 and $538, respectively.

Note 8. Risk and Uncertainties

The Plan invests in various investment securities. Investment securities are exposed to various risks such as interest rate, market and credit risks. Due to the level of risk associated with certain investment securities, it is at least reasonably possible that changes in the values of investment securities will occur in the near term and that such changes could materially affect participants’ account balances and the amounts reported in the Statement of Net Assets Available for Benefits.

Note 9. Subsequent Event

On January 9, 2014, American Pacific Corporation entered into an Agreement and Plan of Merger (the “Merger Agreement”) by and with Flamingo Parent Corp., a Delaware corporation (“Parent”), and Flamingo Merger Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent (“Merger Sub”), both of which are affiliates of and controlled by H.I.G. Capital, LLC, a Delaware limited liability company (“H.I.G.”).

Pursuant to the Merger Agreement, upon the terms and subject to the conditions thereof, Merger Sub commenced a tender offer (the “Offer”) on January 24, 2014 to acquire all of the outstanding shares of common stock of the Company (the “Shares”), at a purchase price of $46.50 per share, in cash (the “Offer Price”), payable without interest and less any applicable withholding taxes.

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American Pacific Corporation 401(k) Plan

Notes to the Financial Statements

Note 9. Subsequent Event (Continued)

On February 27, 2014, AMPAC and H.I.G. announced the successful completion of the “Offer”.

A total of 5,771,139 Shares were validly tendered and not properly withdrawn from the Offer, representing approximately 68.1% of AMPAC’s outstanding Shares. In accordance with the terms of the Offer, all Shares that were validly tendered and not properly withdrawn were accepted for payment, and Merger Sub promptly paid for all such Shares.

As a result of its acceptance of the Shares tendered in the Offer, Merger Sub acquired a sufficient number of Shares to close the merger of Merger Sub with and into AMPAC without the affirmative vote of AMPAC’s stockholders pursuant to Section 251(h) of the Delaware General Corporation Law.

Upon completion of the merger, AMPAC became a wholly owned portfolio company of H.I.G. Each Share that was not validly tendered in the Offer (other than Shares held by Parent, Merger Sub or AMPAC (or held in AMPAC’s treasury), any subsidiary of Parent, Merger Sub or AMPAC, or by any stockholder of AMPAC who properly exercised and perfected appraisal rights under Delaware law) was converted automatically into the right to receive the same $46.50 per Share in cash, without interest, that was paid in the Offer. In addition, the Shares ceased to be traded on the NASDAQ Stock Market at the close of market on February 27, 2014, following completion of the merger.

Prior to the merger, Ampac Fine Chemicals LLC, a participating employer in the Plan, was a wholly owned subsidiary of AMPAC. Upon completion of the merger, Ampac Fine Chemicals LLC became a wholly owned portfolio company of H.I.G. Ampac Fine Chemicals LLC continues to be a participating employer in the Plan.

The shares of common stock held by the Plan on February 27, 2014, were converted automatically into the right to receive an amount in cash equal to the Offer Price without interest. The proceeds of the sale of such shares were allocated to the account of the participant or beneficiary that held such shares. The proceeds were invested in the Federated Prime Cash Obligations Fund, after which it was subject to the participant’s or beneficiary’s further direction to invest such amounts in the other funds available for investment in the Plan.

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