X0202 4 2005-04-05 0 0001257640 KRONOS WORLDWIDE INC KRO 0000024240 CONTRAN CORP 5430 LBJ FRWY SUITE 1700 DALLAS TX 75240 0 0 1 0 0000059255 VALHI INC /DE/ 5430 LBJ FRWY STE 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 0001074793 VALHI GROUP INC 5430 LBJ FREEWAY 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 0001037854 SIMMONS HAROLD C 5430 LBJ FREEWAY SUITE 1700 DALLAS TX 75240 1 1 1 0 Chairman of the Board & CEO 0001074791 TIMET FINANCE MANAGEMENT CO 913 N MARKET ST SUITE 217 WILMINGTON DE 19801 0 0 1 0 Common Stock $0.01 par value 2005-04-05 4 J 0 2000 43 D 17517132 I by NL Common Stock $0.01 par value 27840953 I by Valhi Common Stock $0.01 par value 5203 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 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 4,255 and 36,356 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 Dixie Holding Company, 5430 LBJ Freeway, Suite 1700, Dallas, TX 75240 By: /s/ A. Andrew R. Louis, Secretary (executed 04/07/2005), NOA, Inc., 5430 LBJ Freeway, Suite 1700, Dallas, TX 75240 By: /s/ A. Andrew R. Louis, Secretary (executed 04/07/2005) and Tremont LLC, 5430 LBJ Freeway, Suite 1700, Dallas, TX 75240 By: /s/ A. Andrew R. Louis, Secretary (executed 04/07/2005). 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 2005-04-07 A. Andrew R. Louis, Secretary, for Valhi, Inc. 2005-04-07 A. Andrew R. Louis, Assistant Secretary, for NL Industries, Inc. 2005-04-07 A. Andrew R. Louis, Secretary, for Valhi Group, Inc. 2005-04-07 A. Andrew R. Louis, Secretary, for National City Lines, Inc. 2005-04-07 A. Andrew R. Louis, Assistant Secretary, for Titanium Metals Corporation 2005-04-07 A. Andrew R. Louis, Secretary, for Dixie Rice Agricultural Corporation, Inc. 2005-04-07 A. Andrew R. Louis, Secretary, for Southwest Louisiana Land Company, Inc. 2005-04-07 A. Andrew R. Louis, Attorney-in-fact, for Harold C. Simmons 2005-04-07 Gregory M. Swalwell, Vice President, for TIMET Finance Management Company 2005-04-07