Prepared by R.R. Donnelley Financial -- Form 425

                                                         FILING PURSUANT TO RULE 425 OF THE
                                                         SECURITIES ACT OF 1933, AS AMENDED

                                                         FILER: NORTHROP GRUMMAN CORPORATION

                                                         SUBJECT COMPANY: TRW INC. (NO. 1-2384)

                                                         FILING: REGISTRATION STATEMENT ON FORM S-4
                                                                        (REGISTRATION NO. 333-83672)

Northrop Grumman filed a registration statement on Form S-4 (File No. 333-83672)
and a tender offer statement on Schedule TO with the SEC on March 4, 2002 with
respect to its offer to exchange all outstanding shares of TRW capital stock for
Northrop Grumman stock. These documents contain important information. TRW
shareholders should read these documents and any amendments or supplements
thereto before making any decision regarding the offer to exchange. Copies of
such documents may be obtained without charge at the SEC's website at or from D.F. King & Co., Inc. the information agent for the offer to
exchange, at 800-755-7250.

The directors, certain executive officers and other employees and
representatives of Northrop Grumman may be deemed to be participants in the
solicitation of proxies of TRW shareholders in connection with shareholder
proposals relating to the 2002 Annual Meeting of TRW Shareholders and a Special
Meeting of TRW Shareholders to be held on April 24, 2002 and April 22, 2002,
respectively. Northrop Grumman has filed proxy materials for these shareholder
meetings which contain information regarding such potential participants.
Northrop Grumman's proxy materials contain important information and should be
read by TRW shareholders. These proxy materials and any amendments thereto may
be obtained at no charge at the SEC's website at as they become

The following advertisement was placed by Northrop Grumman on April 17, 2002.