Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
CONTRAN CORP
  2. Issuer Name and Ticker or Trading Symbol
KRONOS WORLDWIDE INC [KRO]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
5430 LBJ FRWY, SUITE 1700
3. Date of Earliest Transaction (Month/Day/Year)
08/19/2005
(Street)

DALLAS, TX 75240
4. If Amendment, Date Original Filed(Month/Day/Year)
6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock $0.01 par value 08/19/2005   J(1)   3,200 A $ 28 27,992,953 I by Valhi (2)
Common Stock $0.01 par value               17,516,132 I by NL (3)
Common Stock $0.01 par value               5,203 I by TFMC (4)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
CONTRAN CORP
5430 LBJ FRWY
SUITE 1700
DALLAS, TX 75240
    X    
VALHI INC /DE/
5430 LBJ FRWY
STE 1700
DALLAS, TX 75240
    X    
NATIONAL CITY LINES INC
5430 LBJ FREEWAY
SUITE 1700
DALLAS, TX 75240
    X    
DIXIE RICE AGRICULTURE CORP INC
5430 LBJ FREEWAY
SUITE 1700
DALLAS, TX 75240
    X    
SOUTHWEST LOUISIANA LAND CO INC
5430 LBJ FREEWAY
SUITE 1700
DALLAS, TX 75240
    X    
TITANIUM METALS CORP
1999 BROADWAY
STE 4300
DENVER, CO 80202
    X    
VALHI GROUP INC
5430 LBJ FREEWAY
SUITE 1700
DALLAS, TX 75240
    X    
NL INDUSTRIES INC
5430 LBJ FREEWAY
SUITE 1700
DALLAS, TX 75240-2697
    X    
TIMET FINANCE MANAGEMENT CO
913 N MARKET ST
SUITE 217
WILMINGTON, DE 19801
    X    
SIMMONS HAROLD C
5430 LBJ FREEWAY
SUITE 1700
DALLAS, TX 75240
  X   X   Chairman of the Board & CEO  

Signatures

 A. Andrew R. Louis, Secretary, for Contran Corporation   08/23/2005
**Signature of Reporting Person Date

 A. Andrew R. Louis, Secretary, for Valhi, Inc.   08/23/2005
**Signature of Reporting Person Date

 A. Andrew R. Louis, Secretary, for National City Lines, Inc.   08/23/2005
**Signature of Reporting Person Date

 A. Andrew R. Louis, Secretary, for Dixie Rice Agricultural Corporation, Inc.   08/23/2005
**Signature of Reporting Person Date

 A. Andrew R. Louis, Secretary, for Southwest Louisiana Land Company, Inc.   08/23/2005
**Signature of Reporting Person Date

 A. Andrew R. Louis, Assistant Secretary, for Titanium Metals Corporation   08/23/2005
**Signature of Reporting Person Date

 A. Andrew R. Louis, Secretary, for Valhi Group, Inc.   08/23/2005
**Signature of Reporting Person Date

 A. Andrew R. Louis, Assistant Secretary, for NL Industries, Inc.   08/23/2005
**Signature of Reporting Person Date

 Gregory M. Swalwell, Vice President, for TIMET Finance Management Company   08/23/2005
**Signature of Reporting Person Date

 A. Andrew R. Louis, Attorney-in-fact, for Harold C. Simmons   08/23/2005
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Open market purchase 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.
(2) 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.
(3) 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.
(4) 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.
 
Remarks:
Mr. Harold C. Simmons and his spouse directly hold 4,755 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 08/23/2005), NOA, Inc., 5430 LBJ Freeway, Suite 1700, Dallas, TX 75240 By: /s/ A. Andrew R. 
Louis, Secretary (executed 08/23/2005) and Tremont LLC, 5430 LBJ Freeway, Suite 1700, Dallas, TX 75240 By: /s/ A. Andrew R. 
Louis, Secretary (executed 08/23/2005). 

See the Additional Information filed as Exhibit 99 to this statement for a description of the relationships among the persons
joining in this filing. 

Exhibit Index 
Exhibit 99 - Additional Information

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