SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13D Under the Securities Exchange Act of 1934 (Amendment No. 22)* TREMONT CORPORATION (Name of Company) Common Stock, $1.00 par value (Title of Class of Securities) 894745 20 7 (CUSIP Number) STEVEN L. WATSON THREE LINCOLN CENTRE SUITE 1700 5430 LBJ FREEWAY DALLAS, TEXAS 75240-2694 (972) 233-1700 (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) February 7, 2003 (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 sections 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. [ ] *The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page. The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes). (Continued on following pages) CUSIP No. 894745 20 7 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Tremont LLC 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) Not Applicable 5 CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) [ ] 6 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware 7 SOLE VOTING POWER None NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY None EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH None 10 SHARED DISPOSITIVE POWER None 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON None 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) None 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO CUSIP No. 894745 20 7 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON NL Industries, Inc. 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) Not Applicable 5 CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) [ ] 6 CITIZENSHIP OR PLACE OF ORGANIZATION New Jersey 7 SOLE VOTING POWER None NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY None EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH None 10 SHARED DISPOSITIVE POWER None 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON None 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) None 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO CUSIP No. 894745 20 7 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Valhi, Inc. 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) Not Applicable 5 CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) [ ] 6 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware 7 SOLE VOTING POWER None NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY None EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH None 10 SHARED DISPOSITIVE POWER None 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON None 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) None 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO CUSIP No. 894745 20 7 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Valhi Group, Inc. 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) Not Applicable 5 CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) [ ] 6 CITIZENSHIP OR PLACE OF ORGANIZATION Nevada 7 SOLE VOTING POWER None NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY None EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH None 10 SHARED DISPOSITIVE POWER None 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON None 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) None 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO CUSIP No. 894745 20 7 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON National City Lines, Inc. 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) Not Applicable 5 CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) [ ] 6 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware 7 SOLE VOTING POWER None NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY None EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH None 10 SHARED DISPOSITIVE POWER None 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON None 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) None 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO CUSIP No. 894745 20 7 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON NOA, Inc. 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) Not Applicable 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 None NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY None EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH None 10 SHARED DISPOSITIVE POWER None 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON None 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) None 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO CUSIP No. 894745 20 7 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Dixie Holding Company 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) Not Applicable 5 CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) [ ] 6 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware 7 SOLE VOTING POWER None NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY None EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH None 10 SHARED DISPOSITIVE POWER None 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON None 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) None 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO CUSIP No. 894745 20 7 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Dixie Rice Agricultural Corporation, Inc. 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) Not Applicable 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 None NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY None EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH None 10 SHARED DISPOSITIVE POWER None 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON None 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) None 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO CUSIP No. 894745 20 7 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Southwest Louisiana Land Company, Inc. 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) Not Applicable 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 None NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY None EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH None 10 SHARED DISPOSITIVE POWER None 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON None 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) None 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO CUSIP No. 894745 20 7 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Contran Corporation 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) Not Applicable 5 CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) [ ] 6 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware 7 SOLE VOTING POWER None NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY None EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH None 10 SHARED DISPOSITIVE POWER None 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON None 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) None 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO CUSIP No. 894745 20 7 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Harold Simmons Foundation, Inc. 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) Not Applicable 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 None NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY None EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH None 10 SHARED DISPOSITIVE POWER None 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON None 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) None 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO CUSIP No. 894745 20 7 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON The Combined Master Retirement Trust 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) Not Applicable 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 None NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY None EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH None 10 SHARED DISPOSITIVE POWER None 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON None 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) None 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) EP CUSIP No. 894745 20 7 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Harold C. Simmons 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) Not applicable 5 CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) [ ] 6 CITIZENSHIP OR PLACE OF ORGANIZATION USA 7 SOLE VOTING POWER None NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY None EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH None 10 SHARED DISPOSITIVE POWER None 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON None 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) None 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) IN AMENDMENT NO. 22 TO SCHEDULE 13D This amended statement on Schedule 13D (this "Statement") relates to the canceled common stock, par value $1.00 per share (the "Shares"), formerly issued by Tremont Corporation, a Delaware corporation (the "Company"). This Statement is hereby amended as set forth below. This Statement is filed by the following former direct and indirect holders of Shares (collectively, the "Reporting Persons"): (i) Tremont LLC as the successor by merger of Tremont Group, Inc. ("TGI"); (ii) NL Industries, Inc. and Valhi, Inc. ("Valhi"), each by virtue of former direct ownership of securities of TGI; (iii) Valhi Group, Inc., National City Lines, Inc., NOA, Inc., Dixie Holding Company, Dixie Rice Agricultural Corporation, Inc., Southwest Louisiana Land Company, Inc., Contran Corporation ("Contran"), the Harold Simmons Foundation, Inc. and The Combined Master Retirement Trust, each by virtue of direct or indirect ownership of securities of Valhi; and (iv) Harold C. Simmons by virtue of his positions with Contran and certain of the other foregoing entities. By signing this Statement, each of the Reporting Persons agrees that this Statement is filed on its or his behalf. On February 7, 2003, a wholly owned subsidiary of Valhi merged (the "TGI Merger") with and into TGI, with TGI surviving as a wholly owned subsidiary of Valhi. Promptly after the TGI Merger, another wholly owned subsidiary of Valhi merged (the "Tremont Merger") with and into the Company with the Company surviving as a wholly owned subsidiary of Valhi. Pursuant to the Tremont Merger, each former stockholder of the Company, other than Valhi and TGI, received 3.4 shares of Valhi common stock for each outstanding Share held by such stockholder immediately prior to the Tremont Merger, and cash in lieu of any fractional shares of Valhi common stock to which the former Tremont stockholder would otherwise have been entitled. Shares held directly by Valhi and TGI prior to the Tremont Merger were canceled in the Tremont Merger. The closing prices per share of Company and Valhi common stock on February 6, 2003 were $27.98 and $8.14 per share, respectively. Promptly after the Tremont Merger, TGI and the Company merged with and into Tremont LLC, with Tremont LLC surviving as a wholly owned limited liability company of Valhi. As a result of the Tremont Merger, on February 7, 2003 the Reporting Persons and the directors and executive officers of the Reporting Persons ceased to own beneficially any Shares. Accordingly, their further obligations to amend this Statement and to report ownership of, and transactions in, Shares under Section 13(d) of the Securities Exchange Act of 1934, as amended, and the regulations promulgated by the Securities and Exchange Commission thereunder have terminated. 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: February 20, 2003 /s/ Harold C. Simmons --------------------- Harold C. Simmons Signing in the capacities listed on Schedule "A" attached hereto and incorporated herein by reference. 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: February 20, 2003 /s/ J. Landis Martin ---------------------- J. Landis Martin Signing in the capacity listed on Schedule "A" attached hereto and incorporated herein by reference. 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: February 20, 2003 /s/ Steven L. Watson ---------------------- Steven L. Watson Signing in the capacities listed on Schedule "A" attached hereto and incorporated herein by reference. SCHEDULE A HAROLD C. SIMMONS, in his individual capacity and as trustee for THE COMBINED MASTER RETIREMENT TRUST. J. LANDIS MARTIN, as president of NL INDUSTRIES, INC. STEVEN L. WATSON, as president or vice president of each of: CONTRAN CORPORATION DIXIE HOLDING COMPANY DIXIE RICE AGRICULTURAL CORPORATION, INC. HAROLD SIMMONS FOUNDATION, INC. NATIONAL CITY LINES, INC. NOA, INC. SOUTHWEST LOUISIANA LAND COMPANY, INC. TREMONT LLC VALHI GROUP, INC. VALHI, INC.