NL INDUSTRIES INC — Director's Dealing 2005

Dec 30, 2005

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: KRONOS WORLDWIDE INC (KRO)
CIK: 0001257640
Period of Report: 2005-12-28

Reporting Person: CONTRAN CORP (10% Owner)
Reporting Person: VALHI INC /DE/ (10% Owner)
Reporting Person: NATIONAL CITY LINES INC (10% Owner)
Reporting Person: DIXIE RICE AGRICULTURE CORP INC (10% Owner)
Reporting Person: SOUTHWEST LOUISIANA LAND CO INC (10% Owner)
Reporting Person: TITANIUM METALS CORP (10% Owner)
Reporting Person: VALHI GROUP INC (10% Owner)
Reporting Person: NL INDUSTRIES INC (10% Owner)
Reporting Person: TIMET FINANCE MANAGEMENT CO (10% Owner)
Reporting Person: SIMMONS HAROLD C (Director, Chairman of the Board & CEO, 10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2005-12-28	Common Stock $0.01 par value	J	5200	$30	Acquired	28027153	Indirect
2005-12-29	Common Stock $0.01 par value	J	35000	$30	Acquired	28062153	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock $0.01 par value	17516132	Indirect
Common Stock $0.01 par value	5203	Indirect

Footnotes

F1: 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.

F2: 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.

F3: 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.

F4: 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.