UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 7) Litton Industries, Inc. ----------------------------------------------------- (Name of Issuer) Common Stock ----------------------------------------------------- (Title of Class of Securities) 538021 10 6 ----------------------------------------------------- (CUSIP Number) Scott Renwick Unitrin, Inc. One East Wacker Drive Chicago, IL 60601 (312) 661-4520 ----------------------------------------------------- (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) April 3, 2001 ----------------------------------------------------- (Date of Event which Requires Filing of this Statement) If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of ss.ss.240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. [ ] Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. Seess.240.13d-7 for other parties to whom copies are to be sent. (Continued on following pages) Page 1 of 6 Pages SCHEDULE 13D CUSIP No. 538021 10 6 Page 2 of 6 Pages ----------------------------------------------------------------------------- 1. Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only). Unitrin, Inc. 95-4255452 ----------------------------------------------------------------------------- 2. Check the Appropriate Box if a Member of a Group (See Instructions) (a) [ ] (b) [ ] ----------------------------------------------------------------------------- 3. SEC Use Only ----------------------------------------------------------------------------- 4. Source of Funds (See Instructions) N/A ----------------------------------------------------------------------------- 5. Check if Disclosure of Legal Proceedings Is Required Pursua9nt to Items 2(d) or 2(e) [ ] ----------------------------------------------------------------------------- 6. Citizenship or Place of Organization Delaware ----------------------------------------------------------------------------- 7. Sole Voting Power 0 Number of --------------------------------------------------- Shares 8. Shared Voting Power Beneficially 0 Owned by ---------------------------------------------------- Each 9. Sole Dispositive Power Reporting 0 Person ---------------------------------------------------- With 10. Shared Dispositive Power 0 ----------------------------------------------------------------------------- 11. Aggregate Amount Beneficially Owned by Each Reporting Person 0 ----------------------------------------------------------------------------- 12. Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) [ ] ----------------------------------------------------------------------------- 13. Percent of Class Represented by Amount in Row (11) 0 ----------------------------------------------------------------------------- 14. Type of Reporting Person (See Instructions) HC, CO CUSIP No. 538021 10 6 Page 3 of 6 Pages ----------------------------------------------------------------------------- 1. Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only). Trinity Universal Insurance Company 75-0620550 ----------------------------------------------------------------------------- 2. Check the Appropriate Box if a Member of a Group (See Instructions) (a) [ ] (b) [ ] ----------------------------------------------------------------------------- 3. SEC Use Only ----------------------------------------------------------------------------- 4. Source of Funds (See Instructions) N/A ----------------------------------------------------------------------------- 5. Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e) [ ] ----------------------------------------------------------------------------- 6. Citizenship or Place of Organization Texas ----------------------------------------------------------------------------- 7. Sole Voting Power 0 Number of --------------------------------------------------- Shares 8. Shared Voting Power Beneficially 0 Owned by ---------------------------------------------------- Each 9. Sole Dispositive Power Reporting 0 Person ---------------------------------------------------- With 10. Shared Dispositive Power 0 ----------------------------------------------------------------------------- 11. Aggregate Amount Beneficially Owned by Each Reporting Person 0 ----------------------------------------------------------------------------- 12. Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) [ ] ----------------------------------------------------------------------------- 13. Percent of Class Represented by Amount in Row (11) 0 ----------------------------------------------------------------------------- 14. Type of Reporting Person (See Instructions) IC, CO CUSIP No. 538021 10 6 Page 4 of 6 Pages ----------------------------------------------------------------------------- 1. Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only). United Insurance Company of America 36-1896670 ----------------------------------------------------------------------------- 2. Check the Appropriate Box if a Member of a Group (See Instructions) (a) [ ] (b) [ ] ----------------------------------------------------------------------------- 3. SEC Use Only ----------------------------------------------------------------------------- 4. Source of Funds (See Instructions) N/A ----------------------------------------------------------------------------- 5. Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e) [ ] ----------------------------------------------------------------------------- 6. Citizenship or Place of Organization Illinois ----------------------------------------------------------------------------- 7. Sole Voting Power 0 Number of --------------------------------------------------- Shares 8. Shared Voting Power Beneficially 0 Owned by ---------------------------------------------------- Each 9. Sole Dispositive Power Reporting 0 Person ---------------------------------------------------- With 10. Shared Dispositive Power 0 ----------------------------------------------------------------------------- 11. Aggregate Amount Beneficially Owned by Each Reporting Person 0 ----------------------------------------------------------------------------- 12. Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) [ ] ----------------------------------------------------------------------------- 13. Percent of Class Represented by Amount in Row (11) 0 ----------------------------------------------------------------------------- 14. Type of Reporting Person (See Instructions) IC, CO CUSIP No. 538021 10 6 Page 5 of 6 Pages ----------------------------------------------------------------------------- 1. Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only). Union National Life Insurance Company 72-0340280 ----------------------------------------------------------------------------- 2. Check the Appropriate Box if a Member of a Group (See Instructions) (a) [ ] (b) [ ] ----------------------------------------------------------------------------- 3. SEC Use Only ----------------------------------------------------------------------------- 4. Source of Funds (See Instructions) N/A ----------------------------------------------------------------------------- 5. Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e) [ ] ----------------------------------------------------------------------------- 6. Citizenship or Place of Organization Louisiana ----------------------------------------------------------------------------- 7. Sole Voting Power 0 Number of --------------------------------------------------- Shares 8. Shared Voting Power Beneficially 0 Owned by ---------------------------------------------------- Each 9. Sole Dispositive Power Reporting 0 Person ---------------------------------------------------- With 10. Shared Dispositive Power 0 ----------------------------------------------------------------------------- 11. Aggregate Amount Beneficially Owned by Each Reporting Person 0 ----------------------------------------------------------------------------- 12. Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) [ ] ----------------------------------------------------------------------------- 13. Percent of Class Represented by Amount in Row (11) 0 ----------------------------------------------------------------------------- 14. Type of Reporting Person (See Instructions) IC, CO Amendment No. 7 to Schedule 13D Page 6 of 6 Pages This Amendment No. 7 amends and supplements the Schedule 13D originally filed by Unitrin, Inc., Trinity Universal Insurance Company and United Insurance Company of America, dated April 6, 1990, as amended by Amendment No. 1 thereto, dated August 20, 1993, Amendment No. 2 thereto, dated October 5, 1995, Amendment No. 3 thereto, dated December 29, 2000, which Amendment No. 3 added Union National Life Insurance Company as a filing person, Amendment No. 4 thereto, dated January 16, 2001, Amendment No. 5 thereto, dated January 24, 2001, and Amendment No. 6 thereto, dated January 31, 2001. Terms used herein and not otherwise defined have the meanings given such terms in the original Schedule 13D, dated April 6, 1990, or in Amendment No. 6 thereto. Item 1. Security and Issuer The class of equity securities to which this Schedule 13D relates is the common stock, par value $1.00 per share, of Litton Industries, Inc., a Delaware corporation (the "Issuer"). The principal executive offices of the Issuer are located at 21240 Burbank Boulevard, Woodland Hills, California 91367-6675. Item 4. Purpose of Transaction Item 4 of Schedule 13D is hereby amended to add the following to the end of Item 4: "On April 3, 2001, Northrop announced the completion of the purchase of all tendered shares of the Issuer in connection with the Transaction. As a result, neither Unitrin nor any of the Unitrin Subsidiaries is the beneficial owner of any shares of the Issuer." Item 5. Interest in Securities of the Issuer Item 5 of Schedule 13D is hereby amended and restated in its entirety to read as follows: "As of April 3, 2001, the filing persons no longer beneficially own any equity securities of the Issuer." Signature After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. DATE: April 13, 2001 UNITRIN, INC. By: /s/ Scott Renwick ------------------------------ Scott Renwick Secretary