X0202 4 2004-12-06 0 0001257640 KRONOS WORLDWIDE INC KRO 0000024240 CONTRAN CORP 5430 LBJ FRWY SUITE 1700 DALLAS TX 75240 0 0 1 0 0000072162 NL INDUSTRIES INC 5430 LBJ FREEWAY SUITE 1700 DALLAS TX 75240-2697 0 0 1 0 0000059255 VALHI INC /DE/ 5430 LBJ FRWY STE 1700 DALLAS TX 75240 0 0 1 0 0000842718 TREMONT LLC 5430 LBJ FREEWAY SUITE 1700 DALLAS TX 75240 0 0 1 0 0000069972 NATIONAL CITY LINES INC 5430 LBJ FREEWAY SUITE 1700 DALLAS TX 75240 0 0 1 0 0001074787 DIXIE RICE AGRICULTURE CORP INC 5430 LBJ FREEWAY SUITE 1700 DALLAS TX 75240 0 0 1 0 0001074790 SOUTHWEST LOUISIANA LAND CO INC 5430 LBJ FREEWAY SUITE 1700 DALLAS TX 75240 0 0 1 0 0001011657 TITANIUM METALS CORP 1999 BROADWAY STE 4300 DENVER CO 80202 0 0 1 0 0001074791 TIMET FINANCE MANAGEMENT CO 913 N MARKET ST SUITE 217 WILMINGTON DE 19801 0 0 1 0 0001037854 SIMMONS HAROLD C 5430 LBJ FREEWAY SUITE 1700 DALLAS TX 75240 1 1 1 0 Chairman of the Board & CEO Common Stock $0.01 par value 2004-12-06 4 J 0 400 44.1 D 18546855 I by NL Common Stock $0.01 par value 2004-12-06 4 J 0 500 43.27 D 18546355 I by NL Common Stock $0.01 par value 2004-12-06 4 J 0 100 43.49 D 18546255 I by NL Common Stock $0.01 par value 2004-12-07 4 J 0 100 42.44 D 18546155 I by NL Common Stock $0.01 par value 2004-12-07 4 J 0 900 42.43 D 18545255 I by NL Common Stock $0.01 par value 2004-12-07 4 J 0 200 42.32 D 18545055 I by NL Common Stock $0.01 par value 2004-12-07 4 J 0 200 42.2 D 18544855 I by NL Common Stock $0.01 par value 2004-12-07 4 J 0 100 42.1 D 18544755 I by NL Common Stock $0.01 par value 2004-12-07 4 J 0 1300 42.05 D 18543455 I by NL Common Stock $0.01 par value 2004-12-07 4 J 0 1300 43.04 D 18542155 I by NL Common Stock $0.01 par value 22101443 I by Valhi Common Stock $0.01 par value 5311899 I by Tremont Common Stock $0.01 par value 2850 I by TFMC Open market sale by NL Industries, Inc. See the Additional Information filed as Exhibit 99 to this statement for a description of the relationships among the persons joining in this filing. Directly held by NL Industries, Inc. See the Additional Information filed as Exhibit 99 to this statement for a description of the relationships among the persons joining in this filing. Directly held by Valhi, Inc. See the Additional Information filed as Exhibit 99 to this statement for a description of the relationships among the persons joining in this filing. Directly held by Tremont LLC. See the Additional Information filed as Exhibit 99 to this statement for a description of the relationships among the persons joining in this filing. Directly held by TIMET Finance Management Company. See the Additional Information filed as Exhibit 99 to this statement for a description of the relationships among the persons joining in this filing. Mr. Harold C. Simmons and his spouse directly hold 3,984 and 35,622 shares, respectively, of the common stock of the issuer. Mr. Simmons disclaims beneficial ownership of the shares of the issuer's common stock that his spouse owns. This form is also filed on behalf of Valhi Group, Inc., 5430 LBJ Freeway, Suite 1700, Dallas, TX 75240 By: /s/ A. Andrew R. Louis, Secretary (executed 12/08/2004), Dixie Holding Company, 5430 LBJ Freeway, Suite 1700, Dallas, TX 75240 By: /s/ A. Andrew R. Louis, Secretary (executed 12/08/2004) and NOA, Inc. 5430 LBJ Freeway, Suite 1700, Dallas, TX 75240 By: /s/ A. Andrew R. Louis, Secretary (executed 12/08/2004). See the Additional Information filed as Exhibit 99 to this statement for a description of the relationships among the persons joining in this filing. A. Andrew R. Louis, Secretary, for Contran Corporation 2004-12-08 A. Andrew R. Louis, Secretary, for Valhi, Inc. 2004-12-08 A. Andrew R. Louis, Assistant Secretary, for NL Industries, Inc. 2004-12-08 A. Andrew R. Louis, Secretary, for Tremont LLC 2004-12-08 A. Andrew R. Louis, Secretary, for National City Lines, Inc. 2004-12-08 A. Andrew R. Louis, Assistant Secretary, for Titanium Metals Corporation 2004-12-08 A. Andrew R. Louis, Secretary, for Dixie Rice Agricultural Corporation, Inc. 2004-12-08 A. Andrew R. Louis, Secretary, for Southwest Louisiana Land Company, Inc. 2004-12-08 A. Andrew R. Louis, Attorney-in-fact, for Harold C. Simmons 2004-12-08 Gregory M. Swalwell, Vice President, for TIMET Finance Management Company 2004-12-08