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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 11-K
(Mark One)
     
þ   ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the fiscal year ended December 31, 2006
OR
     
o   TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from                      to                     .
Commission file number: 1-16411
A.   Full title of the plan and address of the plan, if different from that of the issuer named below:
NORTHROP GRUMMAN PEI
RETIREMENT SAVINGS PLAN
B.   Name of issuer of the securities held pursuant to the plan and the address of its principal executive office:
NORTHROP GRUMMAN CORPORATION
1840 Century Park East
Los Angeles, California 90067
 
 

 


 

Northrop Grumman PEI
Retirement Savings Plan
Financial Statements as of December 31, 2006 and 2005,
and for the Year Ended December 31, 2006, and
Supplemental Schedule as of December 31, 2006 and
Report of Independent Registered Public Accounting Firm

 


 

NORTHROP GRUMMAN PEI RETIREMENT SAVINGS PLAN
TABLE OF CONTENTS
 
         
    Page(s)
    1  
FINANCIAL STATEMENTS:
       
    2  
    3  
    4-11  
SUPPLEMENTAL SCHEDULE:
       
    12  
    13  
EXHIBIT:
       
    14  
NOTE:   Schedule required by Section 2520.103-10 of the Department of Labor’s Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974 have been omitted because of the absence of conditions under which they are required.

 


 

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the Benefit Plan Administrative Committee of the
Northrop Grumman PEI Retirement Savings Plan
We have audited the accompanying statements of net assets available for benefits of the Northrop Grumman PEI Retirement Savings Plan (the “Plan”) as of December 31, 2006 and 2005, and the related statement of changes in net assets available for benefits for the year ended December 31, 2006. These financial statements are the responsibility of the Plan’s management. Our responsibility is to express an opinion on these financial statements based on our audits.
We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. The Plan is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Plan’s internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.
In our opinion, such financial statements present fairly, in all material respects, the net assets available for benefits of the Plan as of December 31, 2006 and 2005, and the changes in net assets available for benefits for the year ended December 31, 2006 in conformity with accounting principles generally accepted in the United States of America.
Our audits were conducted for the purpose of forming an opinion on the basic financial statements taken as a whole. The supplemental schedule of assets (held at end of year) as of December 31, 2006 is presented for the purpose of additional analysis and is not a required part of the basic financial statements, but is supplementary information required by the Department of Labor’s Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974. This schedule is the responsibility of the Plan’s management. Such schedule has been subjected to the auditing procedures applied in our audit of the basic 2006 financial statements and, in our opinion, is fairly stated in all material respects when considered in relation to the basic financial statements taken as a whole.
/s/ DELOITTE & TOUCHE LLP
Los Angeles, California
June 26, 2007

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NORTHROP GRUMMAN PEI RETIREMENT SAVINGS PLAN
STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS
AS OF DECEMBER 31, 2006 AND 2005
 
                 
    2006     2005  
ASSETS:
               
Investment in PEI Master Trust—at fair value
  $ 1,728,565     $ 1,835,990  
Loans receivable from participants
    84,338        
 
           
Total investments
    1,812,903       1,835,990  
Participant contributions receivable
    21,698       22,268  
Employer contributions receivable
    8,906       9,738  
 
           
Total receivables
    30,604       32,006  
 
           
 
               
NET ASSETS AVAILABLE FOR BENEFITS AT FAIR VALUE
    1,843,507       1,867,996  
Adjustment from fair value to contract value for fully benefit-responsive investment contracts
    9,747       5,857  
 
           
NET ASSETS AVAILABLE FOR BENEFITS
  $ 1,853,254     $ 1,873,853  
 
           
See notes to financial statements.

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NORTHROP GRUMMAN PEI RETIREMENT SAVINGS PLAN
STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS
FOR THE YEAR ENDED DECEMBER 31, 2006
 
         
INVESTMENT INCOME:
       
Plan interest in PEI Master Trust
  $ 152,412  
 
     
 
       
CONTRIBUTIONS:
       
Participant
    163,124  
Employer
    68,466  
 
     
Total contributions
    231,590  
 
     
Total additions
    384,002  
BENEFITS PAID TO PARTICIPANTS
    (404,601 )
 
     
DECREASE IN NET ASSETS
    (20,599 )
NET ASSETS AVAILABLE FOR BENEFITS:
       
Beginning of year
    1,873,853  
 
     
End of year
  $ 1,853,254  
 
     
See notes to financial statements.

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NORTHROP GRUMMAN PEI RETIREMENT SAVINGS PLAN
NOTES TO FINANCIAL STATEMENTS
AS OF DECEMBER 31, 2006 AND 2005, AND FOR THE YEAR ENDED DECEMBER 31, 2006
 
1.   DESCRIPTION OF THE PLAN
 
    The following description of the Northrop Grumman PEI Retirement Savings Plan (the “Plan”) provides only general information. Participants should refer to the plan document for a more complete description of the Plan’s provisions.
 
    General — The Plan is a qualified profit-sharing plan sponsored by the Productos Electronicos Industriales division of Northrop Grumman Electronicos, Inc. (the “Company”). The Plan includes a 401(k) feature and employer matching contributions. Both the savings and employee stock ownership features are reported within the Plan’s financial statements.
 
    The Plan was established by the Company on March 1, 1996, as a successor to the Westinghouse de Puerto Rico Retirement Savings Plan (the “Predecessor Plan”), maintained by Westinghouse de Puerto Rico, Inc. for the benefit of Puerto Rican employees of certain Westinghouse Electric Corporation affiliated companies who became employees of the Company, and any other subsequent eligible employees of the Company. The Benefit Plan Administrative Committee of Northrop Grumman Corporation (“NGC”) controls and manages the operation and administration of the Plan. The Plan is subject to the provisions of the Employee Retirement Income Security Act of 1974, as amended (“ERISA”).
 
    All of the Plan’s investments are participant-directed. Plan assets are invested 100 percent in the Northrop Grumman Corporation PEI Pension and 401(k) Plans Master Trust (the “PEI Master Trust”), which is administered by Banco Popular de Puerto Rico (the “PEI Trustee”). The PEI Master Trust, in turn, has invested 100 percent of the Plan’s assets in the Northrop Grumman Defined Contribution Plans Master Trust (the “DC Master Trust”) which is administered by State Street Bank and Trust Company (“State Street”). As an agent to the PEI Trustee, State Street is responsible for tracking the individual assets and reporting month-end plan accounting to the PEI Trustee.
 
    Plan Freeze — In February 2007, NGC announced its intention to close the Company’s operations and effective February 28, 2007, the Plan was frozen to new eligible employees. All existing participant accounts in the Plan are 100% vested. Loans, in-service withdrawals, and distributions upon termination of employment continue to be available to everyone with an account in the Plan.
 
    Contributions — Plan participants may contribute between 1 percent and 8 percent of total compensation, in increments of 1 percent on a pre-tax basis through payroll withholdings. Basic contributions may be made in amounts of 1 percent to 4 percent of total compensation. Eligible employees who have authorized the maximum basic contribution may make supplementary contributions in amounts between 1 percent and 4 percent of total compensation. Contributions are subject to certain limitations imposed by the Internal Revenue Code of 1986, as amended (the “Code”).
 
    The Company contributes a match of 50 percent of the amount of a participant’s basic contribution. The maximum matching contribution will not exceed 2 percent of the total compensation of the participant.
 
    An eligible employee may rollover any amount from another qualified plan or from an Individual Retirement Account into the Plan, provided that such rollover amount is paid to the PEI Trustee within 60 days of the date the employee received the qualifying rollover distribution.
 
    Participant Accounts — A separate account is maintained for each participant, each of which has two sub-accounts. Basic and supplementary contributions are allocated to the participant’s contribution account. Company matching contributions are allocated to the participant’s Company matching contribution account. Assets of the DC Master Trust are valued at the end of each month and take into account earnings and losses of the Plan along with appreciation or depreciation, expenses and distributions. The benefit to which a participant is entitled is the benefit that can be provided from the participant’s vested account.
 
    Vesting — Plan participants are vested immediately in, and have a non-forfeitable right to, the balance of their basic and supplementary contributions at all times. Plan participants become 100 percent vested in Company contributions after three years of service and have no vesting prior to that time. Company contributions also become 100 percent vested upon the attainment of age 65 or the death of a participant.

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    Investment Options — Upon enrollment in the Plan, each participant directs his or her contributions, including employer matching contributions, to be invested in any of the following investment funds within the PEI Master Trust or DC Master Trust:
      Northrop Grumman Fund — The Northrop Grumman Fund (“NG Stock Fund”) invests primarily in Northrop Grumman Corporation common stock.
 
      U.S. Equity Fund — The U.S. Equity Fund consists predominantly of holdings in large and medium sized U.S. company stocks. The fund’s objectives are capital appreciation over the long term, along with current income (dividends). The fund’s stock investments are selected by independent professional investment managers appointed by the Plan’s Investment Committee.
 
      Stable Value Fund — The Plan holds an interest in the Northrop Grumman Stable Value Fund (the “Stable Value Fund”, see Note 5). Investments of the Stable Value Fund are diversified among U.S. Government securities and obligations of government agencies, bonds, short-term investments, cash and investment contracts issued by insurance companies and banks. The Stable Value Fund is managed by an independent professional investment manager appointed by the Plan’s Investment Committee.
 
      U.S. Fixed Income Fund — The U.S. Fixed Income Fund consists of holdings in marketable, fixed income securities rated within the three highest investment grades assigned by Moody’s Investor Services or Standard & Poor’s Corporation, U.S. Treasury or federal agency obligations, or cash equivalent instruments. The fund is broadly diversified and maintains an average maturity of 10 years. The securities are selected by independent professional investment managers appointed by the Plan’s Investment Committee.
    Participant Loans — Effective December 6, 2006, participating employees may borrow from their fund accounts. Loans will be prorated across all investment funds and are secured by the balance in the participant’s account. The interest rate is fixed on the first business day of each month at the prime rate as determined by the Plan’s trustee plus 1 percent. Repayments are made from payroll deductions (for active employees) or other form of payment (for former employees or employees on a leave of absence). The maximum loan period is five years.
 
    Payment of Benefits and Withdrawals — All withdrawals from the Plan during employment shall be paid in cash (net of any outstanding loan balances). All distributions from the Plan upon retirement, termination or death shall be paid in cash and/or shares of Northrop Grumman Corporation common stock held in the account. A participating employee may elect to withdraw all or a portion of the vested portion of the participant account only in the case of hardship, as defined by the Plan, and may make withdrawals twice per year but not more than once per month. If a participating employee retires or is terminated, the vested portion of the participant account shall be distributed to the participant as soon as practicable following the next valuation date after retirement or termination occurs. Any nonvested portion of the participant account shall be forfeited at that time. In the case of death of a participating employee, the entire account shall be distributed in a lump sum to the participant’s beneficiary(ies).
 
    Forfeited Accounts — Any amounts forfeited shall be used to reduce the Company’s obligation to make company matching contributions under the Plan. There were no forfeited amounts in 2006.
 
2.   SIGNIFICANT ACCOUNTING POLICIES
 
    Basis of Accounting — The accompanying financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America.
 
    Use of Estimates — 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 amounts of assets, liabilities, and changes therein, and disclosure of contingent assets and liabilities. Actual results could differ from those estimates.
 
    Risk and Uncertainties — The Plan utilizes various securities, including U.S. Government securities, corporate debt instruments and corporate stocks. Investment securities, in general, are exposed to various risks, such as interest rate, credit and overall market volatility. Due to the level of risk associated with certain investment securities, it is reasonably possible that changes in the values of investment securities may occur in the near term, and that such changes could materially affect the amounts reported in the financial statements.

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    Adoption of new Accounting Guidance Effective December 31, 2006, the financial statements reflect the retroactive adoption of Financial Accounting Standards Board Staff Position, FSP AAG INV-1 and SOP 94-4-1, Reporting of Fully Benefit-Responsive Contracts Held By Certain Investment Companies Subject to the AICPA Investment Company Guide and Defined-Contribution Health and Welfare and Pension Plans (the “FSP”). Investment contracts held by a defined contribution plan are required to be reported at fair value. However, contract value is the relevant measurement attribute for that portion of the net assets available for benefits of a defined contribution plan attributable to fully benefit-responsive investment contracts because contract value is the amount participants would receive if they were to initiate permitted transactions under the terms of the Plan. The FSP provides a definition of fully benefit-responsive investment contracts, which generally represent contracts that provide a liquidity guarantee by a financially responsible third party of principal and accrued interest for withdrawals under the terms of the Plan. As required by the FSP, the statements of net assets available for benefits present investment contracts at fair value as well as an additional line item to reflect an adjustment to the fully benefit-responsive contracts from fair value to contract value. The statement of changes in net assets available for benefits is presented on a contract value basis and was not affected by the adoption of the FSP. The adoption of the FSP did not impact the amount of net assets available for benefits at December 31, 2005, but did result in a reclassification to separately reflect investments at fair value with a corresponding adjustment to net assets in total to contract value.
 
    Investment Valuation and Income Recognition — The Plan’s investments in the PEI Master Trust (which in turn invests in the DC Master Trust) are stated at fair value as determined by State Street. The PEI Trustee relies on the prices provided by State Street in performing any valuations or calculations required of the PEI Trustee. The Plan’s investments, including the underlying investments in the PEI Master Trust, are valued as follows:
 
    Investments in common and preferred stock are valued at the last reported sales price of the stock on the last business day of the plan year. The shares of registered investment companies are valued at quoted market prices that represent the net asset values of shares held by the Plan at year end. Investments in common trust funds are valued based on the redemption price of units owned by the Plan, which is based on the current fair value of the funds underlying assets. Fair values for securities are based on information in financial publications of general circulation, statistical and valuation services, records of security exchanges, appraisals by qualified persons, transactions and bona fide offers in assets of the type in question and other information customarily used in the valuation of assets or if market values are not available, at their fair values as provided to State Street by the party with authority to trade in such securities (investment managers or the Plan’s Investment Committee, as applicable).
 
    Synthetic guaranteed investment contracts (“SICs”) held by the Plan through the Stable Value Fund of the DC Master Trust are recorded at fair value. The fair value of the SICs equals the total of the fair value of the underlying assets plus the total wrapper contract rebid value, which is calculated by discounting the annual rebid fee over the duration of the contract assets. The SICs are considered to be fully benefit-responsive and therefore their carrying value is adjusted from fair market value to contract value in the Statements of Net Assets Available for Benefits.
 
    All securities and cash or cash equivalents are quoted in the local currency and then converted into U.S. dollars using the appropriate exchange rate obtained by State Street. 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. Broker commissions, transfer taxes, and other charges and expenses incurred in connection with the purchase, sale, or other disposition of securities or other investments are added to the cost of such securities or other investments, or are deducted from the proceeds of the sale or other disposition thereof, as appropriate. Taxes, if any, on the assets of the funds, or on any gain resulting from the sale or other disposition of such assets, or on the earnings of the funds, are apportioned among the participants whose interests in the Plan are affected, and the share of such taxes apportioned to each such person is charged against his or her account in the Plan.
 
    The PEI Trustee and State Street rely on the prices provided by pricing sources or the investment managers, Plan’s Investment Committee or participant’s broker as a certification as to value in performing any valuations or calculations required of the trustees. Participant loans are valued at their outstanding balances, which approximate fair value.
 
    The PEI Master Trust allocates investment income, realized gains and losses and unrealized appreciation and depreciation on the underlying securities to the participating plans monthly based on the market value of each plan’s investment. The DC Master Trust allocates investment income, realized gains and losses and unrealized appreciation and depreciation on the underlying securities to the participating plans daily based on the market value of each plan’s investment. The unrealized appreciation or depreciation amount is the aggregate difference between the current fair market value and the cost of investments. The realized gain or loss on investments is the difference between the proceeds received and the average cost of the investments sold.

- 6 -


 

    Administrative Expenses — Administrative expenses of the Plan are paid by the Company.
 
    Payment of Benefits — Payments to participants are recorded upon distribution. Amounts allocated to accounts of participants who have elected to withdraw from the Plan but have not yet been paid were $7,189 at December 31, 2005 and these amounts continued to accrue income due to participants until paid. No such amounts were owed to withdrawing participants at December 31, 2006.
 
3.   INVESTMENTS
 
    PEI Master Trust — The investments of the Plan as of December 31, 2006 and 2005 are stated at fair values reported by the PEI Trustee. Proportionate interests of each participating plan were ascertained on the basis of the PEI Trustee’s plan accounting method for master trust arrangements. Plan assets represented 44 percent and 46 percent of total PEI Master Trust net assets reported by the PEI Trustee as of December 31, 2006 and 2005, respectively. The Plan’s interest in the PEI Master Trust did not include any interest in the PEI Master Trust’s investment in the Northrop Grumman Employee Benefit Plan Master Trust as of December 31, 2006 and 2005, and for the year ended December 31, 2006.
 
    The net assets of the PEI Master Trust at fair value consist of the following as of December 31 2006 and 2005:
                 
    2006   2005
Assets:
               
Investment in Northrop Grumman Employee Benefit Plan Master Trust
  $ 2,222,392     $ 2,160,873  
Investment in Northrop Grumman Defined Contribution Plans Master Trust
    1,649,339       1,768,193  
Northrop Grumman Corporation common stock
    79,226       67,797  
 
           
Net assets of the PEI Master Trust — at fair value
    3,950,957       3,996,863  
 
               
Adjustment from fair value to contract value for fully benefit-responsive investment contracts
    9,747       5,857  
 
           
Net Assets of the PEI Master Trust
  $ 3,960,704     $ 4,002,720  
 
           
    Investment income for the PEI Master Trust is as follows for the year ended December 31, 2006:
         
Plan interest in Northrop Grumman Employee Benefit Plan Master Trust
  $ 296,776  
Plan interest in Northrop Grumman Defined Contribution Plans Master Trust
    115,796  
Northrop Grumman Corporation Common Stock
    36,616  
 
     
Total investment income
  $ 449,188  
 
     
    DC Master Trust — The Plan’s investments consist of a proportionate interest in certain investments held by the DC Master Trust. Those investments are stated at fair values determined and reported by State Street, in accordance with the DC Master Trust Agreement established by the Company.
 
    Proportionate interests of each participating plan were ascertained on the basis of State Street’s plan accounting method for master trust arrangements. Plan assets represent 0.01 percent of total net assets reported by the Trustee of the DC Master Trust as of December 31, 2006 and 2005.

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    The net assets of the DC Master Trust as of December 31 were as follows:
                 
    2006     2005  
Assets:
               
Common and preferred stock
  $ 4,907,908,771     $ 4,506,263,263  
Common/collective trust funds
    4,556,690,453       3,525,719,304  
Synthetic guaranteed investment contracts
    2,991,797,060       2,898,864,923  
U.S. and foreign government securities
    358,379,145       408,733,576  
Corporate debt instruments
    267,468,986       214,406,077  
Cash equivalents and temporary investments
    188,972,545       153,221,884  
Receivable for investments sold
    24,672,594       31,012,899  
Dividends, interest and taxes receivable
    11,849,337       10,823,852  
 
           
Total assets
    13,307,738,891       11,749,045,778  
Liabilities:
               
Due to broker for securities purchased
    115,467,407       72,628,752  
Expense accruals
    19,107,809       183,943  
 
           
Total liabilities
    134,575,216       72,812,695  
 
           
Net assets of the DC Master Trust — at fair value
    13,173,163,675       11,676,233,083  
Adjustment from fair value to contract value for fully benefit-responsive investment contracts
    32,599,231       16,586,039  
 
           
Net assets of the DC Master Trust
  $ 13,205,762,906     $ 11,692,819,122  
 
           
    Investment income for the DC Master Trust for the year ended December 31, 2006 is as follows:
         
Investment income:
       
Net appreciation (depreciation) in fair value of investments:
       
Common/collective trust funds
  $ 575,887,596  
Common and preferred stock
    559,380,263  
Corporate debt instruments
    2,185,613  
Cash equivalents and temporary investments
    292,511  
U.S. and foreign government securities
    (3,285,723 )
 
     
Net appreciation
    1,134,460,260  
 
Dividends
    182,244,498  
Interest
    161,121,367  
Other income
    2,966,489  
Investment manager fees
    (21,746,643 )
Other expenses
    (28,167,729 )
 
     
Total investment income
  $ 1,430,878,242  
 
     
    Other than the Plan’s interest in the PEI Master Trust there are no assets held for investment that represent 5 percent or more of the Plan’s net assets at December 31, 2006 and 2005.
    DC Master Trust Assets on loan to third party borrowers under security lending agreements at December 31, 2006 and 2005 are as follows:
                 
    2006     2005  
Synthetic guaranteed investment contracts
  $ 709,574,297     $ 803,292,987  
Common and preferred stock
    150,323,643       117,101,459  
U.S. and foreign government securities
    58,905,107       97,545,729  
Corporate debt instruments
    9,924,274       12,110,825  
 
           
Total DC Master Trust Assets on loan
  $ 928,727,321     $ 1,030,051,000  
 
           

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    Such assets could be subject to sale restrictions in the event security-lending agreements are terminated and the securities have not been returned to the DC Master Trust. The DC Master Trust held $949,665,893 and $1,052,025,787 of collateral for securities on loans as of December 31, 2006 and 2005, respectively.
 
4.   DERIVATIVE FINANCIAL INSTRUMENTS
 
    Derivative financial instruments may be used by the investment managers of the DC Master Trust as part of their respective strategies. These strategies include the use of futures contracts, interest rate swaps, options on futures and options as substitutes for certain types of securities. Notional amounts disclosed below do not quantify risk or represent assets or liabilities of the DC Master Trust, but are used in the calculation of the cash settlements under the contracts.
 
    The fair value of these instruments is recorded as investments of the DC Master Trust. To the extent that a gain has been recognized, these instruments are recorded as assets and to the extent that a loss has been recognized, these instruments are recorded as a liability. Changes in the fair value of the derivative instrument are reflected in investment income as appreciation (depreciation) in the DC Master Trust. As of December 31, 2006 and 2005, these derivative financial instruments were held for trading purposes. The notional amounts and fair values are presented below:
                                 
    December 31, 2006     December 31, 2005  
            Fair Value             Fair Value  
    Notional     Asset     Notional     Asset  
    Amount     (Liability)     Amount     (Liability)  
Futures Contracts (net position):
                               
U.S. Treasury
  $ 317,994,229     $ 312,568     $ 96,369,583     $ (833,881 )
Eurodollar
    708,589,029       814,321       398,483,962       (1,501,874 )
Index
    1,649,367       28,532       1,433,068       (74,176 )
Interest rate swaps
    78,200,000       (39,543 )     86,570,000       (191,994 )
Options on futures and swap rates (net position)
    133,585,067       (335,544 )     6,440,000       (52,273 )
    Futures Contracts — The DC Master Trust enters into futures contracts in the normal course of investing activities to manage market risk associated with equity and fixed income investments and to achieve overall investment portfolio objectives. These contracts involve elements of market risk in excess of amounts recognized in the statements of net assets available for plan benefits. The credit risk associated with these contracts is minimal as they are traded on organized exchanges and settled daily. The terms of these contracts typically do not exceed one year. Notional amounts related to these contracts in the table above are stated as a net buy (sell) position.
 
    Interest Rate Swaps — The DC Master Trust enters into interest rate swap contracts in the normal course of its investing activities to manage the interest rate exposure associated with fixed income investments. The credit risk associated with these contracts is minimal as they are entered into with a limited number of highly-rated counterparties.
 
    Options on Futures and Swap Rates — The DC Master Trust enters into contracts in the normal course of its investing activities to manage the interest rate exposure associated with fixed income investments. The credit risk associated with these contracts is minimal as they are entered into with a limited number of highly-rated counterparties. Notional amounts related to these contracts in the table above are stated as a net buy (sell) position.
 
5.   INTEREST IN NORTHROP GRUMMAN STABLE VALUE FUND
 
    The Plan’s investment in the PEI Master Trust through its investment in the DC Master Trust includes amounts in the Northrop Grumman Stable Value Fund, established for the investment of the assets of certain savings plans sponsored by NGC and its affiliates. Each participating savings plan has an undivided interest in the Stable Value Fund. At December 31, 2006 and 2005, the Plan’s interests in the net assets of the Stable Value Fund were .03 percent and .04 percent, respectively, of the total fund value. Investment income and administrative expenses relating to the Stable Value Fund are allocated among the participating plans on a daily basis.

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    Investments held in the Stable Value Fund as of December 31, 2006 and 2005 were as follows:
                 
    2006     2005  
Synthetic guaranteed investment contracts (at contract value)
  $ 3,024,396,291     $ 2,915,422,962  
Cash and cash equivalents
    45,024,892       28,713,205  
 
           
Total
  $ 3,069,421,183     $ 2,944,136,167  
 
           
    Investment income of the Stable Value Fund totaled $146,865,633 for the year ended December 31, 2006.
 
    The DC Master Trust has an arrangement with the investment manager of the Stable Value Fund whereby the investment manager has the ability to borrow amounts from third parties to satisfy liquidity needs of the Stable Value Fund, if necessary. As of December 31, 2006 and 2005, no borrowings under this arrangement were outstanding.
 
    The Stable Value Fund holds wrapper contracts in order to manage the market risk and return of certain securities held by the Stable Value Fund. The wrapper contracts generally modify the investment characteristics of certain underlying securities such that they perform in a manner similar to guaranteed investment contracts. Each wrapper contract and the related underlying assets comprise the SICs and are recorded at contract value. Contract value represents contributions made under the contract, plus interest at the contract rate, less withdrawals and contract administrative expenses.
 
    The fair value of the underlying assets related to the SICs was $2,991,797,060 and $2,898,864,923 as of December 31, 2006 and 2005, respectively, and the fair value of the wrapper contracts was nil at December 31, 2006 and 2005. The weighted average yield (excluding administrative expenses) for all investment contracts was 5.18 percent and 5.02 percent at December 31, 2006 and 2005, respectively. Average duration for all investment contracts was 3.25 years and 3.19 years at December 31, 2006 and 2005, respectively. The crediting interest rate for all investment contracts was 5.13 percent and 4.89 percent at December 31, 2006 and 2005, respectively. Crediting interest rates are reset on a quarterly basis. Resets are determined based upon the market-to-book ratio, along with the yield and duration of the underlying investments.
 
    In certain circumstances, the amounts withdrawn from a wrapper contract would be payable at fair value rather than at contract value. These events include termination of the Plan, a material adverse change to the provisions of the Plan, a withdrawal from a wrapper contract in order to switch to a different investment provider, or adoption of a successor plan (in the event of the spin-off or sale of a division) that does not meet the wrapper contract issuer’s underwriting criteria for issuance of a clone wrapper contract. Plan management believes that the events described above that could result in the payment of benefits at fair market value rather than contract value is not probable of occurring in the foreseeable future.
 
6.   EXEMPT PARTY-IN-INTEREST TRANSACTIONS
 
    Party-in-interest transactions through the PEI Master Trust and DC Master Trust include the purchase and sale of investments managed by affiliates, transactions involving common stock of NGC, and payments made to the Company or NGC for certain Plan administrative costs. The Plan held 1,075 shares and 1,128 shares of common stock of the Company with a fair value of $79,226 and $67,797 of at December 31, 2006, and 2005, respectively. During 2006, the Plan received dividends of $1,337 from its investment in Northrop Grumman Corporation. A significant decline in the market value of the Company’s common stock would significantly affect the net assets available for benefits.
 
    The Plan had transactions with the PEI Trustee’s and State Street’s short-term investment funds, liquidity pooled funds in which participation commences and terminates on a daily basis.
 
    The DC Master Trust utilized various investment managers to manage its net assets. These net assets may be invested into funds also managed by the investment managers. Therefore, these transactions qualify as party-in-interest transactions.
 
7.   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 of ERISA. In the event of the Plan’s termination, participants will become 100 percent vested in their accounts and non-forfeitable.

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8.   FEDERAL INCOME TAX STATUS
 
    The Plan is intended to be qualified under the Code and the Puerto Rico Income Tax Code of 1994. The Plan obtained its latest determination letter dated December 11, 2000, in which the Internal Revenue Service determined that the Plan terms at the time of the determination letter application were in compliance with the applicable sections of the Code and, therefore, the related trust is exempt from taxation. The Plan has been amended since receiving the determination letter. Although the amendments have not yet been filed for a favorable determination letter, management will make any changes necessary to maintain the Plan’s tax-qualified status. However, management believes that the Plan and the related trust are designed and currently being operated in compliance with the applicable provisions of the Code and Puerto Rico Income Tax Code of 1994. Therefore, no provision for income taxes has been included in the Plan’s financial statements.
 
9.   RECONCILIATION OF FINANCIAL STATEMENTS TO FORM 5500
 
    The following is a reconciliation of net assets available for plan benefits per the financial statements to Form 5500 as of December 31:
                 
    2006     2005  
Net assets available for benefits per the financial statements
  $ 1,853,254     $ 1,873,853  
Less: Amounts allocated to withdrawing participants
          (7,189 )
 
           
Net assets per Form 5500
  $ 1,853,254     $ 1,866,664  
 
           
    The following is a reconciliation of benefits paid to participants per the financial statements to Form 5500 for the year ended December 31, 2006:
         
Benefits paid to participants per the financial statements
  $ 404,601  
Less: Amounts allocated to withdrawing participants at December 31, 2005
    (7,189 )
 
     
Benefits paid to participants per Form 5500
  $ 397,412  
 
     
    There were no amounts allocated to withdrawing participants as of December 31, 2006. Amounts allocated to withdrawing participants are recorded on Form 5500 for benefit claims that have been processed and approved for payment prior to December 31, 2005 but not yet paid as of that date.
* * * * *

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NORTHROP GRUMMAN PEI RETIREMENT SAVINGS PLAN
FORM 5500, SCHEDULE H, PART IV, LINE 4i
AS OF SCHEDULE OF ASSETS (HELD AT END OF YEAR)
DECEMBER 31, 2006
 
                     
    (b)   (c)   (d)   (e)  
        Description of Investment,          
    Including Maturity Date, Rate of          
Identity of Issue, Borrower,   Interest, Collateral, Par or       Current  
Lessor or Similar Party   Maturity Value   Cost   Value  
*
  Northrop Grumman Defined
Contribution Plans Master Trust
  Participation in Northrop Grumman
Defined Contribution Plans Master Trust
  **   $ 1,649,339 ***
*
  Northrop Grumman Corporation   1,075 Shares of Northrop Grumman Corporation common stock   **     79,226  
 
  Plan Participants   Participant loans (maturing 2011 at an interest rate of 8.25%)   **     84,338  
 
                 
 
              $ 1,812,903  
 
                 
*   Party-in-interest
 
**   Cost information is not required for participant-directed investments and therefore is not included.
 
***   Excludes adjustment from fair value to contract value for fully benefit-responsive investment contracts.

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SIGNATURES
Pursuant to the requirements of the Securities and Exchange Act of 1934, the trustees (or other persons who administer the employee benefit plan) have duly caused this annual report to be signed on its behalf by the undersigned hereunto duly authorized.
         
  NORTHROP GRUMMAN PEI RETIREMENT SAVINGS PLAN
 
 
  By:   /S/ IAN ZISKIN    
Dated: June 29, 2007    Ian Ziskin   
    Chairman, Benefit Plan Administrative Committee   

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