THIS DOCUMENT CONSTITUTES PART OF A PROSPECTUS COVERING SECURITIESTHAT HAVE BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933.I. INTRODUCTIONThis Summary <strong>Plan</strong> Description summarizes the important provisions of the <strong>AMSEC</strong> <strong>Employees</strong><strong>401</strong>(k) <strong>Profit</strong> <strong>Sharing</strong> <strong>Plan</strong> (“<strong>Plan</strong>”). This <strong>Plan</strong> has been adopted by Huntington Ingalls Industries, Inc.(the “Parent Company”) to provide a tax-qualified income deferral arrangement for Participants and toallow participating <strong>Employees</strong> to acquire additional benefits through company matching contributions.The <strong>Plan</strong> is maintained by the Parent Company for the benefit of certain individuals employed by<strong>AMSEC</strong> LLC (“<strong>AMSEC</strong>”), a subsidiary of the Parent Company. The Parent Company and <strong>AMSEC</strong>were previously subsidiaries of the Northrop Grumman Corporation, at which time the <strong>Plan</strong> wassponsored by <strong>AMSEC</strong>. On March 31, 2011, the Northrop Grumman Corporation spun-off the ParentCompany and its subsidiaries, including <strong>AMSEC</strong>, and the Parent Company became the sponsor of the<strong>Plan</strong>.This summary does not determine rights under the <strong>Plan</strong>, but is intended only to answer the mostfrequently asked questions about the <strong>Plan</strong> and to provide a description of how the <strong>Plan</strong> operates.The official <strong>Plan</strong> document sets forth your rights and obligations under the <strong>Plan</strong>. Nothing in thisSummary <strong>Plan</strong> Description should be considered as altering or affecting the provisions of the<strong>Plan</strong> document itself. Also, the <strong>Plan</strong> document may be amended without prior notice and thisSummary <strong>Plan</strong> Description may not be updated until a date later than the effective date of a<strong>Plan</strong> amendment.In very general terms, the <strong>Plan</strong> operates as follows: You may defer part of your compensation byhaving it contributed directly to the <strong>Plan</strong>, where it is maintained in your Deferral Account. Youreduce the amount of your compensation that is taxed to you by the amount you defer to the <strong>Plan</strong>.<strong>AMSEC</strong> may also elect to contribute cash to the <strong>Plan</strong> to match a percentage of your contributionsand/or to allow the <strong>Plan</strong> to satisfy legal requirements. These matching contributions are allocated toyour Company Contribution Account and are immediately vested. In addition, <strong>AMSEC</strong> maycontribute profit-sharing contributions to the <strong>Plan</strong> in an amount (determined annually) that is thenallocated to your Company Contribution Account on the basis of your eligible compensation for theyear. Your eligible compensation includes your regular salary, wages, overtime, shift differential,hazard pay and similar payments, pay while on leave or vacation, special pay approved by theCompany pursuant to its policies for extended work by salaried employees, any military differentialpay you receive from the company while serving on active duty to make up for some or all of thedifference between your active duty military pay and your higher civilian pay, post-terminationpayments for accrued vacation or sick leave that are paid by the later of the 2-1/2 months aftertermination or December 31 st of the year of termination, and any retroactive pay adjustments. Itexcludes regular bonuses. All your Accounts in the <strong>Plan</strong> are held in trust by the <strong>Plan</strong> Trustee,currently Vanguard Fiduciary Trust Company (“Vanguard”), and invested in the investmentalternative(s) you selected or that are designated for all or a portion of your Accounts.You are not taxed on your deferred compensation, the amount allocated to your Accounts, or anyincrease in value of your Accounts until these amounts are distributed to you from the <strong>Plan</strong>.March 20111<strong>AMSEC</strong> SPD
The specific terms of the <strong>Plan</strong> are set forth in the <strong>Plan</strong> document itself, which is the document thatgoverns the rights of Participants under the <strong>Plan</strong>. However, because it is not feasible to set forth in the<strong>Plan</strong> document all of the many details and procedures involved in administering the <strong>Plan</strong>, a committeeappointed by the Board of Directors of the Parent Company (referred to in this Summary <strong>Plan</strong>Description as the “Committee” or “<strong>Plan</strong> Administrator”) has been given the authority to establishprocedures for various <strong>Plan</strong> administrative functions and to interpret <strong>Plan</strong> provisions. The day-to-dayadministration of the <strong>Plan</strong> is carried out by <strong>AMSEC</strong>’s Director of Human Resources or designee.The examples in this document are for illustration purposes only and in no way guarantee or predictactual circumstances.II. ELIGIBILITY AND PARTICIPATIONW hat I s the P lan’ s E ffective Date?The <strong>Plan</strong> was originally adopted by American System Engineering Corporation effective July 1, 1981.Additional amendments have been made since that date. This Summary <strong>Plan</strong> Description explains theamended and restated <strong>Plan</strong> in effect as of March 31, 2011, which is sponsored by the Parent CompanyAm I E ligible T o Par ticipate?Receipt of this document does not entitle you to automatically participate in the <strong>Plan</strong>. You are eligibleto participate in the <strong>Plan</strong> if you are an employee of <strong>AMSEC</strong>, as soon as you are hired, unless you fallinto one of the categories below:1. You are covered by a collective bargaining agreement that does not provide for coverage underthis <strong>Plan</strong>.2. You are in a group or classification of employees that was determined to be ineligible toparticipate in the <strong>Plan</strong>.3. You are a leased employee.4. You are a nonresident alien employee with no earnings from services in the United States.5. You are a consultant or independent contractor who is not treated as an employee on <strong>AMSEC</strong>’spayroll records during the applicable <strong>Plan</strong> Year or other relevant computation period,notwithstanding the fact that you are at some subsequent date determined to be an employee forpayroll purposes.W hen Do I B ecome E ligible T o J oin?Your eligibility to participate in the <strong>Plan</strong> begins as of the date you start working for <strong>AMSEC</strong> as aneligible employee or, if later, the date you become an eligible employee. (See Article II - “Am IEligible To Participate?”)March 2011 2 <strong>AMSEC</strong> SPD