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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  Schedule 13D

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 16)*

                            CompX International Inc.
                                (Name of Issuer)

                 Class A Common Stock, par value $0.01 per share
                         (Title of Class of Securities)

                                   20563P 10 1
                                 (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)

                                  May 11, 2006
                      (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. 20563P 10 1 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON CompX 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) OO 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 -0- NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY 2,586,820 EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH -0- 10 SHARED DISPOSITIVE POWER 2,586,820 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,586,820 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 49.4% 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 20563P 10 1 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) WC 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 -0- NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY 2,922,024 EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH -0- 10 SHARED DISPOSITIVE POWER 2,922,024 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,922,024 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 55.8% 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 20563P 10 1 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON TIMET Finance Management 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) WC 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 -0- NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY 3,070,420 EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH -0- 10 SHARED DISPOSITIVE POWER 3,070,420 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,070,420 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 58.6% 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 20563P 10 1 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Titanium Metals 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) WC 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 -0- NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY 3,070,420 EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH -0- 10 SHARED DISPOSITIVE POWER 3,070,420 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,070,420 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 58.6% 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 20563P 10 1 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 -0- NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY 3,070,420 EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH -0- 10 SHARED DISPOSITIVE POWER 3,070,420 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,070,420 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 58.6% 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) OO

CUSIP No. 20563P 10 1 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) WC 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 -0- NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY 3,405,624 EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH -0- 10 SHARED DISPOSITIVE POWER 3,405,624 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,405,624 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 65.0% 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 20563P 10 1 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Valhi 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 -0- NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY 3,405,624 EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH -0- 10 SHARED DISPOSITIVE POWER 3,405,624 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,405,624 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 65.0% 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 20563P 10 1 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 -0- NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY 3,405,624 EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH -0- 10 SHARED DISPOSITIVE POWER 3,405,624 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,405,624 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 65.0% 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 20563P 10 1 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 -0- NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY 3,405,624 EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH -0- 10 SHARED DISPOSITIVE POWER 3,405,624 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,405,624 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 65.0% 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 20563P 10 1 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 -0- NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY 3,405,624 EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH -0- 10 SHARED DISPOSITIVE POWER 3,405,624 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,405,624 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 65.0% 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 20563P 10 1 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 -0- NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY 3,405,624 EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH -0- 10 SHARED DISPOSITIVE POWER 3,405,624 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,405,624 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 65.0% 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 20563P 10 1 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 -0- NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY 3,405,624 EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH -0- 10 SHARED DISPOSITIVE POWER 3,405,624 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,405,624 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 65.0% 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 20563P 10 1 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 -0- NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY 3,405,624 EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH -0- 10 SHARED DISPOSITIVE POWER 3,405,624 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,405,624 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 65.0% 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 20563P 10 1 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 -0- NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY 3,405,624 EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH -0- 10 SHARED DISPOSITIVE POWER 3,405,624 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,405,624 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 65.0% 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 20563P 10 1 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 -0- NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY 3,405,624 EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH -0- 10 SHARED DISPOSITIVE POWER 3,405,624 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,405,624 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 65.0% 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) EP

CUSIP No. 20563P 10 1 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 -0- NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY 3,405,624 EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH -0- 10 SHARED DISPOSITIVE POWER 3,405,624 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,405,624 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 65.0% 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 20563P 10 1 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 56,900 NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY 3,425,624 EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH 56,900 10 SHARED DISPOSITIVE POWER 3,425,624 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 56,900 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ X ] 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 1.1% 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) IN

AMENDMENT NO. 16 TO SCHEDULE 13D This amended statement on Schedule 13D (this "Statement") relates to the class A common stock, par value $0.01 per share (the "Class A Shares"), of CompX International Inc., a Delaware corporation (the "Company"). Items 2, 3, 4 and 5 of this Statement are hereby amended as set forth below. Item 2. Identity and Background. Item 2(a) is amended and restated as follows. (a) The following entities or person are filing this Statement (collectively, the "Reporting Persons"): (i) CompX Group, Inc. ("CGI") as a direct holder of Class A Shares; (ii) NL Industries, Inc. ("NL") and TIMET Finance Management Company ("TFMC") by virtue of their direct ownership of CGI and as direct holders of Class A Shares; (iii) Titanium Metals Corporation ("TIMET") by virtue of its indirect ownership of CGI and direct ownership of TFMC; (iv) Tremont LLC ("Tremont") by virtue of its indirect ownership of CGI and TFMC; (v) Valhi, Inc. ("Valhi"), Valhi Holding Company ("VHC"), Valhi Group, Inc. ("VGI"), National City Lines, Inc. ("National"), NOA, Inc. ("NOA"), Dixie Holding Company ("Dixie Holding"), Dixie Rice Agricultural Corporation, Inc. ("Dixie Rice"), Southwest Louisiana Land Company, Inc. ("Southwest"), Contran Corporation ("Contran"), The Combined Master Retirement Trust (the "CMRT") and the Harold Simmons Foundation, Inc. (the "Foundation") by virtue of their indirect ownership of CGI, TFMC and NL; and (vi) Harold C. Simmons by virtue of his direct and indirect ownership of Class A Shares and his positions with Contran and certain of the other entities (as described in this Statement). By signing this Statement, each Reporting Person agrees that this Statement is filed on its or his behalf. CGI, TFMC, NL, Harold C. Simmons and his spouse are direct holders of 49.4%, 9.2%, 6.4%, 1.1% and 0.4%, respectively, of the 5,240,280 Class A Shares outstanding as of June 1, 2006 according to information the Company provided (the "Outstanding Class A Shares"). CGI also directly holds 100%, or 10,000,000 shares, of the Company's class B common stock, par value $0.01 per share (the "Class B Shares" and collectively with the Class A Shares shall be referred to as the "Shares"). The description of the relative rights of the Shares as described in this Statement is qualified in its entirety by the terms of the Company's restated certificate of incorporation that is filed as Exhibit 3.1 to Amendment No. 1 to the Company's Registration Statement on Form S-1 filed with the U.S. Securities and Exchange Commission on February 4, 1998 (Reg. No. 333-42643), which is incorporated herein by reference. As a result of its ownership of 49.4% of the Class A Shares and 100% of the Class B Shares, CGI directly holds approximately 82.6% of the combined voting power (97.5% of the voting power for the election of directors) of all classes of voting stock of the Company. CGI may be deemed to control the Company. NL and TFMC are the direct holders of approximately 82.4%, and 17.6%, respectively, of the outstanding shares of CGI common stock and together may be deemed to control CGI. Valhi and TFMC are the direct holders of approximately 83.1% and 0.5%, respectively, of the outstanding shares of NL common stock and together may be deemed to control NL. TIMET is the direct holder of 100% of the outstanding shares of common stock of TFMC and may be deemed to control TFMC. Tremont, Harold C. Simmons' spouse, the CMRT, Valhi and Harold C. Simmons are the direct holders of approximately 33.3%, 12.4%, 10.2%, 3.9% and 2.8% of the outstanding shares of TIMET common stock. Tremont may be deemed to control TIMET. The ownership of Mr. Simmons' spouse includes 21,333,333 shares of TIMET common stock that she has the right to acquire upon conversion of 1,600,000 shares of TIMET's 6 3/4% Series A Convertible Preferred Stock, par value $0.01 per share (the "Series A Preferred Stock"), that she directly owns. The ownership of Valhi includes 196,000 shares of TIMET common stock that Valhi has the right to acquire upon conversion of 14,700 shares of Series A Preferred Stock that Valhi directly holds. The percentage ownership of TIMET common stock held by each of Ms. Simmons and Valhi assumes the full conversion of only the shares of Series A Preferred Stock she or Valhi owns, respectively. All share amounts for TIMET common stock in this amendment no. 16 to this Statement reflect the two-for-one split of the Shares that TIMET paid in the form of a stock dividend on the close of business on May 15, 2006 to holders of record as of the close of business on May 5, 2006. Valhi is the sole member of Tremont and may be deemed to control Tremont. VHC, the Foundation, the Contran Deferred Compensation Trust No. 2 (the "CDCT No. 2") and the CMRT are the direct holders of 91.8%, 0.9%, 0.4% and 0.1%, respectively, of the common stock of Valhi. VHC may be deemed to control Valhi. VGI, National, and Contran are the direct holders of 87.4%, 10.3% and 2.3%, respectively, of the outstanding common stock of VHC. Together, VGI, National, and Contran may be deemed to control VHC. National, NOA and Dixie Holding are the direct holders of approximately 73.3%, 11.4% and 15.3%, respectively, of the outstanding shares of common stock of VGI. Together, National, NOA and Dixie Holding may be deemed to control VGI. Contran and NOA are the direct holders of approximately 85.7% and 14.3%, respectively, of the outstanding shares of common stock of National and together may be deemed to control National. Contran and Southwest are the direct holders of approximately 49.9% and 50.1%, respectively, of the outstanding shares of common stock of NOA and together may be deemed to control NOA. Dixie Rice is the direct holder of 100% of the outstanding shares of common stock of Dixie Holding and may be deemed to control Dixie Holding. Contran is the holder of 100% of the outstanding shares of common stock of Dixie Rice and may be deemed to control Dixie Rice. Contran is the holder of approximately 88.9% of the outstanding shares of common stock of Southwest and may be deemed to control Southwest. Substantially all of Contran's outstanding voting stock is held by trusts established for the benefit of certain children and grandchildren of Harold C. Simmons (the "Trusts"), of which Mr. Simmons is the sole trustee, or held by Mr. Simmons or persons or other entities related to Mr. Simmons. As sole trustee of the Trusts, Mr. Simmons has the power to vote and direct the disposition of the shares of Contran stock held by the Trusts. Mr. Simmons, however, disclaims beneficial ownership of any shares of Contran stock that the Trusts hold. The Foundation directly holds approximately 0.9% of the outstanding shares of Valhi common stock. The Foundation is a tax-exempt foundation organized for charitable purposes. Harold C. Simmons is the chairman of the board of the Foundation and may be deemed to control the Foundation. The CDCT No. 2 directly holds approximately 0.4% of the outstanding shares of Valhi common stock. U.S. Bank National Association serves as the trustee of the CDCT No. 2. Contran established the CDCT No. 2 as an irrevocable "rabbi trust" to assist Contran in meeting certain deferred compensation obligations that it owes to Harold C. Simmons. If the CDCT No. 2 assets are insufficient to satisfy such obligations, Contran is obligated to satisfy the balance of such obligations as they come due. Pursuant to the terms of the CDCT No. 2, Contran (i) retains the power to vote the shares of Valhi common stock held directly by the CDCT No. 2, (ii) retains dispositive power over such shares and (iii) may be deemed the indirect beneficial owner of such shares. The CMRT directly holds approximately 10.2% of the outstanding shares of TIMET common stock and 0.1% of the outstanding shares of Valhi common stock. Contran sponsors the CMRT, which permits the collective investment by master trusts that maintain the assets of certain employee benefit plans Contran and related companies adopt. Harold C. Simmons is the sole trustee of the CMRT and a member of the trust investment committee for the CMRT. Mr. Simmons is also a participant in one or more of the employee benefit plans that invest through the CMRT. NL and a subsidiary of NL directly own 3,522,967 shares and 1,186,200 shares, respectively, of Valhi common stock. Pursuant to Delaware law, Valhi treats the shares of Valhi common stock that NL and the subsidiary of NL own as treasury stock for voting purposes and for the purposes of this Statement such shares are not deemed outstanding. Mr. Harold C. Simmons is chairman of the board and chief executive officer of NL and chairman of the board of CGI, TIMET, Tremont, Valhi, VHC, VGI, National, NOA, Dixie Holding, Dixie Rice, Southwest and Contran. By virtue of the holding of the offices, the stock ownership and his service as trustee, all as described above, (a) Mr. Simmons may be deemed to control the entities described above and (b) Mr. Simmons and certain of such entities may be deemed to possess indirect beneficial ownership of the Shares that are directly held by CGI, TFMC and NL. However, Mr. Simmons disclaims such beneficial ownership of the Shares beneficially owned, directly or indirectly, by any of such entities. Harold C. Simmons' spouse is the direct owner of 20,000 Class A Shares, 128,600 shares of TIMET common stock, 1,600,000 shares of TIMET Series A Preferred Stock, 239,475 shares of NL common stock and 43,400 shares of Valhi common stock. Mr. Simmons may be deemed to share indirect beneficial ownership of such securities. He disclaims beneficial ownership of all securities that his spouse holds directly. Harold C. Simmons is the direct owner of 56,900 Class A Shares, 4,167,900 shares of TIMET common stock, 447,100 shares of NL common stock (including stock options exerciseable for 2,000 shares) and 3,383 shares of Valhi common stock. A trust of which Harold C. Simmons and his spouse are co-trustees and the beneficiaries of which are the grandchildren of his spouse is the direct holder of 36,500 shares of Valhi common stock. Mr. Simmons disclaims beneficial ownership of these shares. Certain information concerning the directors and executive officers of the Reporting Persons, including offices held by Mr. Simmons is set forth on Schedule B attached hereto and incorporated herein by reference. The Reporting Persons understand that the funds required by each person named in Schedule B to this Statement to acquire Shares were from such person's personal funds. Item 3. Source and Amount of Funds or Other Consideration. Item 3 is amended as follows. The total amount of funds NL used to acquire the Class A Shares NL purchased as reported in Item 5(c) was $1,187,516.00 (including commissions). NL obtained such funds from its cash on hand. Item 4. Purpose of Transaction. Item 4 is amended as follows. NL purchased the Class A Shares reported in Item 5(c) in order to increase its equity interest in the Company. Depending upon their evaluation of the Company's business and prospects, and upon future developments (including, but not limited to, performance of the Class A Shares in the market, availability of funds, alternative uses of funds, and money, stock market and general economic conditions), any of the Reporting Persons or other entities that may be deemed to be affiliated with Contran may from time to time purchase Shares, and any of the Reporting Persons or other entities that may be deemed to be affiliated with Contran may from time to time dispose of all or a portion of the Shares held by such person, or cease buying or selling Shares. Any such additional purchases or sales of Shares may be in open market or privately negotiated transactions or otherwise. The information included in Item 2 of this Statement is hereby incorporated herein by reference. As described under Item 2 of this Statement, Harold C. Simmons may be deemed to control the Company. Certain of the persons named in Schedule B to this Statement, namely Eugene K. Anderson, James W. Brown, Robert D. Graham, Tim C. Hafer, J. Mark Hollingsworth, Keith A. Johnson, William J. Lindquist, A. Andrew R. Louis, Kelly D. Luttmer, Andrew B. Nace, Bobby D. O'Brien, Glenn R. Simmons, Harold C. Simmons, John A. St. Wrba, Gregory M. Swalwell and Steven L. Watson are officers and/or directors of the Company or perform services for the Company as employees of one of the Company's parent corporations and may acquire Class A Shares from time to time pursuant to employee benefit plans that the Company sponsors or other compensation arrangements with the Company or otherwise. Except as described in this Item 4, none of the Reporting Persons nor, to the best knowledge of such persons, any other person named in Schedule B to this Statement has formulated any plans or proposals which relate to or would result in any matter required to be disclosed in response to paragraphs (a) through (j) of Item 4 of Schedule 13D. Item 5. Interest in Securities of the Issuer. Item 5 is amended as follows. (a) CGI, TFMC, NL, Harold C. Simmons and his spouse are the direct beneficial owners of 2,586,820, 483,600, 335,204, 56,900, and 20,000 Class A Shares, respectively. CGI also directly holds 10,000,000 Class B Shares. By virtue of the relationships described under Item 2 of this Statement: (1) CGI may be deemed to be the beneficial owner of the 2,586,820 Class A Shares (approximately 49.4% of the Outstanding Class A Shares) and 10,000,000 Class B Shares (approximately 82.6% of the combined voting power, and 97.5% of the voting power for the election of directors, of all classes of voting stock of the Company) that CGI holds directly; (2) NL may be deemed to be the beneficial owner of the 2,922,024 Class A Shares (approximately 55.8% of the Outstanding Class A Shares) and 10,000,000 Class B Shares (approximately 84.8% of the combined voting power, and 97.8% of the voting power for the election of directors, of all classes of voting stock of the Company) that CGI and NL hold directly; (3) TFMC, TIMET and Tremont may each be deemed to be the beneficial owner of the 3,070,420 Class A Shares (approximately 58.6% of the Outstanding Class A Shares) and 10,000,000 Class B Shares (approximately 85.8% of the combined voting power, and 97.9% of the voting power for the election of directors, of all classes of voting stock of the Company) that CGI and TFMC hold directly; (4) Valhi, VHC, VGI, National, NOA, Dixie Holding, Dixie Rice, Southwest, Contran, the CMRT and the Foundation may each be deemed to be the beneficial owner of the 3,405,624 Class A Shares (approximately 65.0% of the Outstanding Class A Shares) and 10,000,000 Class B Shares (approximately 88.0% of the combined voting power, and 98.3% of the voting power for the election of directors, of all classes of voting stock of the Company) that CGI, TFMC and NL hold directly; and (5) Harold C. Simmons may be deemed to be the beneficial owner of the 3,482,524 Class A Shares (approximately 66.5% of the Outstanding Class A Shares) and 10,000,000 Class B Shares (approximately 88.5% of the combined voting power, and 98.3% of the voting power for the election of directors, of all classes of voting stock of the Company) that CGI, TFMC, NL, he and his spouse hold directly. Except to the extent of the 56,900 Class A Shares he holds directly, Harold C. Simmons disclaims beneficial ownership of all Shares. The Reporting Persons understand, based on ownership filings with the U.S. Securities and Exchange Commission (the "Commission") or upon information provided by the persons listed on Schedule B to this Statement, that such persons may be deemed to own beneficially the Class A Shares as indicated on Schedule C to this Statement. (b) By virtue of the relationships described in Item 2 of this Statement: (1) CGI may be deemed to share the power to vote and direct the disposition of the 2,586,820 Class A Shares (approximately 49.4% of the Outstanding Class A Shares) and 10,000,000 Class B Shares (approximately 82.6% of the combined voting power, and 97.5% of the voting power for the election of directors, of all classes of voting stock of the Company) that CGI holds directly; (2) NL may be deemed to share the power to vote and direct the disposition of the 2,922,024 Class A Shares (approximately 55.8% of the Outstanding Class A Shares) and 10,000,000 Class B Shares (approximately 84.8% of the combined voting power, and 97.8% of the voting power for the election of directors, of all classes of voting stock of the Company) that CGI and NL hold directly; (3) TFMC, TIMET and Tremont may each be deemed to share the power to vote and direct the disposition of the 3,070,420 Class A Shares (approximately 58.6% of the Outstanding Class A Shares) and 10,000,000 Class B Shares (approximately 85.8% of the combined voting power, and 97.9% of the voting power for the election of directors, of all classes of voting stock of the Company) that CGI and TFMC hold directly; (4) Valhi, VHC, VGI, National, NOA, Dixie Holding, Dixie Rice, Southwest, Contran, the CMRT and the Foundation may each be deemed to share the power to vote and direct the disposition of the 3,405,624 Class A Shares (approximately 65.0% of the Outstanding Class A Shares) and 10,000,000 Class B Shares (approximately 88.0% of the combined voting power, and 98.3% of the voting power for the election of directors, of all classes of voting stock of the Company) that CGI, TFMC and NL hold directly; (5) Harold C. Simmons may be deemed to share the power to vote and direct the disposition of the 3,425,624 Class A Shares (approximately 65.4% of the Outstanding Class A Shares) and 10,000,000 Class B Shares (approximately 88.1% of the combined voting power, and 98.3% of the voting power for the election of directors, of all classes of voting stock of the Company) that CGI, TFMC, NL and his spouse hold directly; and (6) Harold C. Simmons may be deemed to have the sole power to vote and direct the disposition of the 56,900 Class A Shares (approximately 1.1% of the Outstanding Class A Shares) that he directly holds. (c) The table below sets forth transactions in the Shares by the Reporting Persons since March 29, 2006, the last transaction reported in amendment no. 15 to this Statement. Other than Glenn R. Simmons and Steven L. Watson, NL was the only Reporting Person to have transactions since March 29, 2006. NL executed all of such transactions, which were all purchases of Shares on the New York Stock Exchange. Number of Price Per Share ($) Date Shares (exclusive of commissions) ---------------- --------------- -------------------------------- 04/21/06 100 $15.20 04/21/06 900 $15.50 04/21/06 1,700 $15.68 04/24/06 200 $16.00 04/27/06 3,600 $16.00 04/28/06 4,900 $16.00 05/01/06 1,100 $15.75 05/01/06 500 $15.76 05/01/06 2,000 $16.00 05/02/06 1,600 $16.00 05/04/06 4,700 $16.00 05/05/06 10,000 $16.00 05/08/06 10,000 $16.00 05/08/06 900 $15.75 05/09/06 9,400 $15.50 05/10/06 300 $15.50 05/11/06 3,400 $15.50 05/12/06 2,800 $15.50 05/15/06 1,300 $15.50 05/16/06 1,600 $15.50 05/17/06 2,200 $15.50 05/18/06 1,800 $15.50 05/19/06 1,000 $15.50 05/22/06 1,400 $15.50 05/23/06 1,500 $15.50 05/24/06 900 $15.50 05/30/06 5,000 $15.25 05/31/06 400 $15.50 Mr. Glenn R. Simmons and Steven L. Watson each received on May 16, 2006, 1,000 Shares, which Shares represent the Company's annual grant of Shares for no cash consideration to the Company's non-employee directors. (d) CGI, TFMC, NL, Harold C. Simmons and his spouse each has the right to receive and the power to direct the receipt of dividends from, and proceeds from the sale of, the Shares directly held by such entity or person.

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: June 7, 2006 /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: June 7, 2006 /s/ Steven L. Watson ---------------------- Steven L. Watson 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: June 7, 2006 /s/ Gregory M. Swalwell ----------------------- Gregory M. Swalwell Signing in the capacity listed on Schedule "A" attached hereto and incorporated herein by reference.

SCHEDULE A HAROLD C. SIMMONS, in his individual capacity and as trustee of THE COMBINED MASTER RETIREMENT TRUST. STEVEN L. WATSON, as president, chief executive officer 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. TITANIUM METALS CORPORATION TREMONT LLC VALHI GROUP, INC. VALHI HOLDING COMPANY VALHI, INC. GREGORY M. SWALWELL, as vice president of each of: COMPX GROUP, INC. NL INDUSTRIES, INC. TIMET FINANCE MANAGEMENT COMPANY

Schedule B The names of the directors and executive officers of CompX Group, Inc. ("CGI"), Contran Corporation ("Contran"), Dixie Holding Company ("Dixie Holding"), Dixie Rice Agricultural Corporation, Inc. ("Dixie Rice"), the Harold Simmons Foundation, Inc. (the "Foundation"), National City Lines, Inc. ("National"), NL Industries, Inc. ("NL"), NOA, Inc. ("NOA"), Southwest Louisiana Land Company, Inc. ("Southwest"), TIMET Finance Management Company ("TFMC"), Titanium Metals Corporation ("TIMET"), Valhi Group, Inc. ("VGI"), Valhi Holding Company ("VHC") and Valhi, Inc. ("Valhi") and their present principal occupations are set forth below. Except as otherwise indicated, each such person is a citizen of the United States of America and the business address of each such person is 5430 LBJ Freeway, Suite 1700, Dallas, Texas 75240. Name Present Principal Occupation - ----------------------------- --------------------------------------------- Eugene K. Anderson Vice president of Contran, Dixie Holding, Dixie Rice, National, NOA, Southwest, Tremont LLC, a wholly owned limited liability company of Valhi ("Tremont"), Valhi, VGI and VHC; and treasurer of the Foundation. Thomas E. Barry (1) Vice president for executive affairs at Southern Methodist University and professor of marketing in the Edwin L. Cox School of Business at Southern Methodist University; and a director of Valhi. James W. Brown Vice president, corporate finance of TIMET. Keith R. Coogan (2) Chief executive officer of Software Spectrum, Inc.; director of Kronos Worldwide, Inc., a subsidiary of Valhi ("Kronos Worldwide"), and TIMET Norman S. Edelcup (3) Mayor of Sunny Isles Beach, Florida; director of CompX International Inc., a subsidiary of NL (the "Company"), Valhi and Florida Savings Bancorp; and trustee of the Baron Funds, a mutual fund group. Lisa Simmons Epstein Director and president of the Foundation. Robert D. Graham Vice president of Contran, Dixie Holding, Dixie Rice, the Foundation, National, NOA, Southwest, Tremont, Valhi, VGI and VHC; executive vice president of TIMET; vice president and general counsel of Kronos Worldwide and NL; and vice president, general counsel and secretary of CGI. Norman N. Green (4) A private investor and a director of TIMET. Tim C. Hafer Vice president and controller, Kronos Worldwide and NL. J. Mark Hollingsworth Vice president and general counsel of Contran, Dixie Holding, Dixie Rice, National, NOA, Southwest, Tremont, Valhi, VGI and VHC; general counsel of the Foundation and the Company; trust counsel of The Combined Master Retirement Trust, a trust Contran sponsors that permits the collective investment by master trusts that maintain the assets of certain employee benefit plans Contran and related companies adopt (the "CMRT"); and acting general counsel of Keystone Consolidated Industries, Inc., a subsidiary of Contran ("Keystone"). Bruce P. Inglis (5) Vice president-finance, operations of TIMET. Francis B. Jacobs, II (6) Vice president-client services of Stewart Management Company; and director, vice president and assistant secretary of TFMC. Keith A. Johnson Controller of the Foundation. William J. Lindquist Director and senior vice president of Contran, Dixie Holding, National, NOA, VGI and VHC; senior vice president of Dixie Rice, Southwest, Tremont and Valhi; and a director of CGI. A. Andrew R. Louis Secretary of Contran, the Company, Dixie Holding, Dixie Rice, Kronos Worldwide, National, NL, NOA, Southwest, Tremont, TIMET, Valhi, VGI and VHC. Kelly D. Luttmer Vice president and tax director of Contran, CGI, the Company, Dixie Holding, Dixie Rice, Kronos Worldwide, National, NOA, NL, Southwest, TIMET, Tremont, Valhi, VGI and VHC. Andrew McCollam, Jr. (7) President and a director of Southwest; director of Dixie Rice; and a private investor. W. Hayden McIlroy (8) Private investor primarily in real estate; and a director of Valhi and Cadco Systems, Inc., a manufacturer of emergency alert systems. Harold M. Mire (9) Vice president of Dixie Rice and Southwest. Cecil H. Moore, Jr. (10) Director of NL and Kronos Worldwide; and a private investor. Andrew B. Nace Vice president and general counsel of TIMET. Bobby D. O'Brien Vice president, chief financial officer and director of Dixie Holding, National, NOA, VGI and VHC; executive vice president and chief financial officer of TIMET; vice president and chief financial officer of Contran, Dixie Rice, Southwest, Tremont and Valhi; and director of CGI. Glenn R. Simmons Vice chairman of the board of Contran, Dixie Holding, Dixie Rice, National, NOA, Tremont, Valhi, VGI and VHC; chairman of the board of the Company and Keystone; director and executive vice president of Southwest; and a director of CGI, Kronos Worldwide, NL and TIMET. Harold C. Simmons Chairman of the board of CGI, Contran, Dixie Holding, Dixie Rice, the Foundation, National, NOA, Southwest, TIMET, Tremont, Valhi, VGI and VHC; chairman of the board and chief executive officer of Kronos Worldwide and NL; and trustee and member of the trust investment committee of the CMRT. Richard A. Smith (9) Vice president of Dixie Rice. Thomas P. Stafford (11) Director of NL and TIMET; chairman of the NASA Advisory Council Task Force on the International Space Station Program. John A. St. Wrba Vice president and treasurer of Contran, CGI, the Company, Dixie Holding, Dixie Rice, Kronos Worldwide, National, NL, NOA, Southwest, TIMET, Tremont, Valhi, VGI and VHC. Scott E. Sullivan Vice president and controller of TIMET. Gregory M. Swalwell Vice president and controller of Contran, Dixie Holding, National, NOA, Southwest, Tremont, Valhi, VGI and VHC; vice president, finance and chief financial officer of CGI, Kronos Worldwide and NL; vice president of Dixie Rice and TIMET; and director, vice president and treasurer of TFMC. J. Walter Tucker, Jr. (12) President, treasurer and a director of Tucker & Branham, Inc., a mortgage banking, insurance and real estate company; a director of Valhi; and a member of the trust investment committee of the CMRT. Steven L. Watson Director and president of Contran, Dixie Holding, Dixie Rice, National, NOA, VGI and VHC; director, president and chief executive officer of Valhi; president of Tremont; director and executive vice president of Southwest; director, vice president and secretary of the Foundation; vice chairman of Kronos Worldwide; vice chairman, president and chief executive officer of TIMET; and a director of CGI, the Company, Keystone and NL. Terry N. Worrell (13) Director of NL; a private investor with Worrell Investments, Inc., real estate investment company. Joan L. Yori (6) Vice president-client services of Stewart Management Company; and director, president, secretary and assistant treasurer of TFMC. Paul J. Zucconi (14) A private investor and a director of TIMET. - ---------- (1) The principal business address for Dr. Barry is Southern Methodist University, Perkins Administration Bldg. #224, Dallas, Texas 75275. (2) The principal business address for Mr. Coogan is Software Spectrum, Inc., 3480 Lotus Drive, Plano, Texas 75075. (3) The principal business address for Mr. Edelcup is 17395 North Bay Road, Suite 103, Sunny Isles Beach, Florida 33160. (4) Mr. Green is a citizen of Canada. The principal business address for Mr. Green is 10340 Strait Lane, Dallas, Texas 75229. (5) Mr. Inglis is a citizen of Canada. The principal business address for Mr. Inglis is 1999 Broadway, Suite 4300, Denver, Colorado 80202. (6) The principal business address for Mr. Jacobs and Ms. Yori is Nemours Building, Suite 1410, 1007 Orange Street, Wilmington, Delaware 19801. (7) The principal business address for Mr. McCollam is 402 Canal Street, Houma, Louisiana 70360. (8) The principal business address for Mr. McIlroy is 25 Highland Park Village, Suite 100-341, Dallas, Texas 75225. (9) The principal business address for Messrs. Mire and Smith is 600 Pasquiere Street, Gueydan, Louisiana 70542-0010. (10) The principal business address for Mr. Moore is 4444 Beverly Drive, Dallas, Texas 75205. (11) The principal business address for Gen. Stafford (ret.) is Stafford Technology Inc., Suite 102, 4200 Perimeter Center, Oklahoma City, Oklahoma 73112. (12) The principal business address for Mr. Tucker is 1350 North Orange Avenue, Suite 102, Winter Park, Florida 32789. (13) The principal business address for Mr. Worrell is 6909 Vassar, Dallas, Texas 75205. (14) The principal business address for Mr. Zucconi is 2801 Mill Haven Court, Plano, Texas 75093.

SCHEDULE C Based upon ownership filings with the Commission or upon information provided by the persons listed on Schedule B to this Statement, such persons may be deemed to personally beneficially own Class A Shares, as outlined below: Stock Options Held Name Class A Shares Held (1) Total - -------------------------- ------------------- ------------------- ----------- Eugene K. Anderson -0- 3,000 3,000 Thomas E. Barry -0- -0- -0- James W. Brown -0- -0- -0- Keith R. Coogan 3,500 -0- 3,500 Norman S. Edelcup 2,000 -0- 2,000 Lisa Simmons Epstein -0- -0- -0- Robert D. Graham -0- -0- -0- Norman N. Green -0- -0- -0- Tim C. Hafer -0- -0- -0- J. Mark Hollingsworth -0- 7,000 7,000 Bruce P. Inglis -0- -0- -0- Francis B. Jacobs, II -0- -0- -0- Keith A. Johnson -0- 4,000 4,000 William J. Lindquist -0- 10,000 10,000 A. Andrew R. Louis -0- 4,000 4,000 Kelly D. Luttmer 200 4,000 4,200 Andrew McCollam, Jr. -0- -0- -0- W. Hayden McIlroy -0- -0- -0- Harold M. Mire -0- -0- -0- Cecil H. Moore, Jr. -0- -0- -0- Andrew B. Nace -0- -0- -0- Bobby D. O'Brien 300 10,000 10,300 Glenn R. Simmons (2) 16,500 55,600 72,100 Harold C. Simmons (3) 76,900 -0- 76,900 Richard A. Smith -0- -0- -0- Thomas P. Stafford -0- -0- -0- John A. St. Wrba -0- -0- -0- Gregory M. Swalwell -0- 5,000 5,000 Scott E. Sullivan -0- -0- -0- J. Walter Tucker, Jr. -0- -0- -0- Steven L. Watson 7,000 15,600 22,600 Terry N. Worrell -0- -0- -0- Joan L. Yori -0- -0- -0- Paul J. Zucconi -0- -0- -0- - ---------- (1) Represents Class A Shares issuable pursuant to the exercise within 60 days of the date of this Statement of stock options. (2) Includes 500 Class A Shares held directly by Mr. Glenn R. Simmons' spouse. Mr. Simmons disclaims beneficial ownership of all such Shares. (3) Includes 20,000 Class A Shares held directly by Mr. Harold C. Simmons' spouse. Does not include other Shares of which Mr. Simmons may be deemed to possess indirect beneficial ownership as described in Items 2 and 5(a) of this Statement. Except for the 56,900 Class A Shares that he holds directly, Mr. Simmons disclaims beneficial ownership of all Shares.