SECURITIES AND EXCHANGE COMMISSION

                           Washington, D.C.   20549

                                   FORM 8-K

                                CURRENT REPORT

                    Pursuant to Section 13 or 15(d) of the

                        Securities Exchange Act of 1934

        Date of Report (date of earliest event reported) April 3, 2001

                          ___________________________

                         NORTHROP GRUMMAN CORPORATION
              (Exact name of registrant as specified in charter)


                                                              
       Delaware                           1-16411                      95-4840775
(State or otherjurisdiction       (Commission File Number)          (I.R.S. Employer
   of incorporation)                                               Identification No.)


                            1840 Century Park East
                         Los Angeles, California 90067
         (Address of Principal Executive Offices, Including Zip Code)

                                (310) 553-6262
             (Registrant's Telephone Number, Including Area Code)

                                   NNG, Inc.
         (Former name or former address, if changed since last report)

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Item 2.  Acquisition Or Disposition Of Assets

     Northrop Grumman Corporation (formerly NNG, Inc.), a Delaware corporation
("New Northrop Grumman") entered into an Amended and Restated Agreement and Plan
of Merger (the "Amended Merger Agreement"), dated January 23, 2001, among New
Northrop Grumman, Northrop Grumman Systems Corporation (formerly Northrop
Grumman Corporation), a Delaware corporation ("Systems"), Litton Industries,
Inc., a Delaware corporation ("Litton") and LII Acquisition Corp., a Delaware
corporation and wholly-owned subsidiary of New Northrop Grumman ("LII").

     Pursuant to the Amended Merger Agreement, New Northrop Grumman agreed to
acquire all of the outstanding capital stock of Litton through an offer to
purchase or exchange (the "Offer") followed by a merger (the "Litton Merger") of
LII with and into Litton, with Litton as the corporation surviving the Litton
Merger as a wholly-owned subsidiary of New Northrop Grumman. Pursuant to the
Offer to Purchase or Exchange dated February 1, 2001 and comprising a part of
New Northrop Grumman's Registration Statement on Form S-4 (Commission File No.
333-54800) as amended from time to time, New Northrop Grumman offered to
purchase (a) each outstanding share of the Litton Common Stock for any of the
following, at the election of the holder: (i) $80.00 net per share, in cash, not
subject to proration, (ii) 0.9286 shares of common stock of New Northrop
Grumman, par value $1.00 per share, subject to proration, or (iii) 0.80 shares
of Series B Preferred Stock of New Northrop Grumman, subject to proration, and
(b) each outstanding share of Series B $2 Cumulative Preferred Stock (the
"Litton Preferred Stock") of Litton for $35.00 net per share, in cash. Pursuant
to the Offer, a maximum of 13,000,000 shares of New Northrop Grumman common
stock and 3,500,000 shares of New Northrop Grumman Series B Preferred Stock were
issuable in exchange for validly tendered shares of Litton Common Stock.

     The Offer expired at Midnight New York City time on Monday, April 2, 2001
and at approximately 12:30 a.m. on April 3, 2001, New Northrop Grumman accepted
for purchase or exchange 44,660,440 shares of Litton Common Stock and 240,632
shares of Litton Preferred Stock, which represents approximately 97.3% of the
outstanding shares of Litton Common Stock and approximately 58.6% of the
outstanding shares of Litton Preferred Stock, respectively, as of March 28,
2001.  On April 11, 2001, New Northrop Grumman assigned all of its right, title
and interest in the 240,632 shares of Litton Preferred Stock purchased by it
pursuant to the Offer to Systems, its wholly-owned subsidiary.

     The value of the Litton acquisition is approximately $5.1 billion, which
includes the assumption of Litton's approximately $1.3 billion in net debt.  The
purchase price was based upon an analysis of the perceived value of the ongoing
business and the estimated net assets to be acquired and took into account the
liabilities reflected on the balance sheet of Litton and assumed by New Northrop
Grumman.

     New Northrop Grumman obtained the cash portion of the purchase price from
(i) an offering made by Systems pursuant to Rule 144A promulgated under the
Securities Act of 1933, as amended, of $1.5 billion in debt securities having
maturity dates of 10 and 30 years and (ii) advances pursuant to credit
facilities consisting of a $2.5 billion Five Year Revolving Credit Agreement and
a $2.5 billion 364-Day Revolving Credit Agreement, each dated

                                  Page 2 of 7



March 30, 2001, among New Northrop Grumman, Systems, Litton, The Chase
Manhattan Bank and Credit Suisse First Boston, as Co-Administrative Agents,
Solomon Smith Barney Inc., as Syndication Agent, the Bank of Novia Scotia and
Deutsche Banc Alex. Brown, Inc., as Co-Documentation Agents, and the lender
signatories thereto (each, a "Credit Agreement"). Forms of each Credit Agreement
are included as Exhibits 10.6 and 10.7 hereto and reference is made thereto for
the complete terms and conditions of each Credit Agreement.

     On April 3, 2001, New Northrop Grumman executed and delivered guarantees of
the outstanding indenture indebtedness of Litton and Systems, Systems executed
and delivered guarantees of the outstanding indenture indebtedness of Litton,
and Litton executed and delivered guarantees of the outstanding indenture
indebtedness of Systems.

     Pursuant to the Amended Merger Agreement, on April 2, 2001, Systems
completed a corporate reorganization to create a holding company structure (the
"Northrop Reorganization") that was effected by action of its Board of Directors
without a vote of System's stockholders pursuant to Section 251(g) of the
Delaware General Corporation Law (the "DGCL"). In accordance with Section 251(g)
of the DGCL, NGC Acquisition Corp., a Delaware corporation and indirect wholly-
owned subsidiary of Systems, was merged with and into Systems, with Systems as
the surviving corporation and a wholly-owned subsidiary of New Northrop Grumman,
the new holding company. At the effective time of that merger and in connection
with the Northrop Reorganization, New Northrop Grumman changed its name from
NNG, Inc. to "Northrop Grumman Corporation," and Northrop Grumman Corporation
changed its name to "Northrop Grumman Systems Corporation." In the Northrop
Reorganization, all of the outstanding shares of capital stock of Systems became
the same number of shares of the same class of capital stock of New Northrop
Grumman. Outstanding options to acquire common stock of Systems became options
to acquire common stock of New Northrop Grumman.

     Pursuant to the Amended Merger Agreement, the acquisition of Litton will be
completed through a second step merger in which LII will be merged into Litton
and the remaining holders of common shares of Litton will receive $80.00 in cash
for each common share.

     In the normal course of their business, Systems and Litton are parties to
transactions and agreements.


     Unitrin, Inc., which together with certain of its subsidiaries,
collectively owned approximately 27.8% of the outstanding shares of Litton
common stock as of January 23, 2001, entered into a Stockholders Agreement dated
as of January 23, 2001 with New Northrop Grumman and Systems, pursuant to which
Unitrin agreed to tender and cause its subsidiaries and affiliates to tender at
least 3,750,000 of their shares of Litton common stock in the offer for shares
of New Northrop Grumman preferred stock and to tender the remainder for New
Northrop Grumman common stock. In addition, Systems and New Northrop Grumman
entered into a Registration Rights Agreement dated as of January 23, 2001 with
Unitrin, whereby Systems and New Northrop Grumman agreed to provide certain
registration rights to Unitrin with respect to the shares of New Northrop
Grumman stock issued in exchange for Unitrin's and its subsidiaries' and
affiliates' Litton common stock. The Stockholder's Agreement and the
Registration Rights Agreement are included as Exhibits 10.1 and 4.1 hereto, and
reference is made thereto for the complete terms and conditions of each
agreement.


                                  Page 3 of 7


    Pursuant to a letter agreement with Dr. Ronald D. Sugar dated December 21,
2000, as amended on January 31, 2001, Systems and Dr. Sugar agreed that Dr.
Sugar will serve as Corporate Vice President of New Northrop Grumman and
President and Chief Executive Officer of Litton. The parties also agreed that
Dr. Sugar will be nominated to New Northrop Grumman's Board of Directors
effective as of the closing of the Litton Merger, provided that the Litton
Merger closes on or before December 31, 2001. On April 3, 2001, Dr. Sugar was
elected to New Northrop Grumman's Board of Directors. In general, under the
terms of the letter agreement, New Northrop Grumman assumed Litton's obligations
under Dr. Sugar's change of control employment agreement and his letter
agreement dated June 21, 2000.

     Except as described above or disclosed in the Offer to Purchase or
Exchange, no known material relationship exists between Litton and New Northrop
Grumman or any of its affiliates, directors or officers, or any associate of any
such directors or officers.  The foregoing summary is qualified in its entirety
by the exhibits attached hereto, which are incorporated herein by this
reference.

Item 7.  FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS

(a)  Financial Statements of Businesses Acquired.

     The following financial statements of Litton are hereby incorporated by
reference into this report from the indicated report filed with the Securities
and Exchange Commission:

     The following financial statements of Litton are hereby incorporated by
reference from the Annual Report on Form 10-K for the fiscal year ended July 31,
2000, filed with the Securities and Exchange Commission on October 11, 2000:

     .  Report of Independent Accountants;

     .  Consolidated Balance Sheets at July 31, 2000 and 1999;

     .  Consolidated Statements of Operations for the years ended July 31, 2000,
        1999 and 1998;

     .  Consolidated Statements of Stockholders' Investment for the years ended
        July 31, 2000, 1999 and 1998; and

     .  Consolidated Statements of Cash Flows for the years ended July 31, 2000,
        1999 and 1998.

     The following financial statements of Litton are hereby incorporated by
reference from the Quarterly Report on Form 10-Q for the period ended January
31, 2000 of Litton filed with the Securities and Exchange Commission on March 6,
2001:

     .  Consolidated Balance Sheets at January 31, 2001;

     .  Consolidated Statements of Operations for the six months ended January
        31, 2001; and

     .  Consolidated Statement of Cash Flows for the six months ended January
        31, 2001.

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(b)       Pro Forma Financial Information.

     The pro forma financial information required by Article 11 of Regulation S-
X in connection with the transaction reported on this Form 8-K is not included
herein.  Such pro forma financial information will be filed no later than 60
days after the date this report must be filed.

(c)  Exhibits.




Exhibit                                  Description of Exhibits
Number
          
 2.1         Amended and Restated Agreement and Plan of Merger dated as of
             January 23, 2001, among Systems, Litton, New Northrop Grumman,
             and LII Acquisition Corp. filed as exhibit 2.2 to Form S-4
             Registration Statement No. 333-54800 filed with the SEC on February
             1, 2001 and incorporated herein by reference.

 4.1         Registration Rights Agreement dated as of January 23, 2001 by and
             among Systems, New Northrop Grumman and Unitrin, Inc., filed as
             exhibit (d)(6) to Amendment No. 4 to the Schedule TO filed with the
             SEC on January 31, 2001 and incorporated herein by reference.

 4.2         Form of Certificate of Designations, Preferences and Rights of
             Series B Preferred Stock of New Northrop Grumman filed as exhibit
             4.2 to Form S-4 Registration Statement No. 333-54800 filed with the
             SEC on February 1, 2001 and incorporated herein by reference.

 4.3         Rights Agreement dated as of January 31, 2001 between New Northrop
             Grumman and EquiServe Trust Company, N.A. filed as exhibit 4.3 to
             Form S-4 Registration Statement No. 333-54800 filed with the SEC on
             March 27, 2001 and incorporated herein by reference.

10.1         Stockholder's Agreement dated as of January 23, 2001 among Systems,
             New Northrop Grumman and Unitrin, Inc., including form of
             Stockholder Subsidiary Proxy, filed as exhibit (d)(5) to Amendment
             No. 4 to the Schedule TO filed with the SEC on January 31, 2001 and
             incorporated herein by reference.

10.2         Employment Agreement with Dr. Ronald D. Sugar, filed as exhibit
             99(e)(7) to the Solicitation/Recommendation Statement on Schedule
             14D-9 filed with the SEC


                                  Page 5 of 7




          
             by Litton on January 5, 2001 and incorporated herein by reference.

 10.6        Form of $2,500,000,000 364-Day Revolving Credit Agreement among New
             Northrop Grumman, Systems, Litton, the Lenders party thereto, The
             Chase Manhattan Bank and Credit Suisse First Boston, as Co-
             Administrative Agents, Salomon Smith Barney Inc., as Syndication
             Agent, and The Bank of Nova Scotia and Deutsche Banc Alex. Brown,
             Inc. as Co-Documentation Agents, filed as Exhibit 10.6 to Amendment
             No. 2 to Form S-4 Registration Statement No. 333-54800 filed with
             the SEC on March 27, 2001 and incorporated herein by reference .


 10.7        Form of $2,500,000,000 Five-Year Revolving Credit Agreement among New
             Northrop Grumman, Systems, Litton, the Lenders party thereto, The Chase
             Manhattan Bank and Credit Suisse First Boston, as Co-Administrative
             Agents, Salomon Smith Barney Inc., as Syndication Agent, and The Bank of
             Nova Scotia and Deutsche Banc Alex. Brown, Inc. as Co-Documentation
             Agents, filed as Exhibit 10.7 to Amendment No. 2 to Form S-4 Registration
             Statement No. 333-54800 filed with the SEC on March 27, 2001 and incorporated
             herein by reference.

 10.8        Letter Agreement dated January 31, 2001 between Systems and Dr. Ronald D. Sugar,
             filed as exhibit 99(e)(16) to Amendment No. 3 to Solicitation/Recommendation
             Statement on Schedule 14D-9 filed with the SEC by Litton on February 1, 2001
             and incorporated herein by reference.

 10.9        Form of Officers' Certificate establishing the terms of Systems' 7-1/8% Notes
             due 2011 and 7-3/4% Debentures due 2031.

 10.10       Form of Guarantee by New Northrop Grumman of Litton Indenture Indebtedness.

 10.11       Form of Guarantee by New Northrop Grumman of Systems Indenture Indebtedness.

 10.12       Form of Guarantee by Systems of Litton Indenture Indebtedness.

 10.13       Form of Guarantee by Litton of Systems Indenture Indebtedness.

 23.1        Consent of Independent Accountants.

 99.1        Press Release of New Northrop Grumman dated April 3, 2001, filed pursuant to
             Rule 425 with the SEC by Systems on April 4, 2001 and incorporated herein by
             reference.


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                                   SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                     NORTHROP GRUMMAN CORPORATION
                                      (formerly NNG, Inc.)

Date:  April 17, 2001                By:  /s/ John H. Mullan
                                         ---------------------------------------
                                         John H. Mullan,
                                         Corporate Vice President, Secretary and
                                         Associate General Counsel

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