NL INDUSTRIES INC — Director's Dealing 2005

Mar 30, 2005

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: KRONOS WORLDWIDE INC (KRO)
CIK: 0001257640
Period of Report: 2005-03-28

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: SIMMONS HAROLD C (Director, Chairman of the Board & CEO, 10% Owner)
Reporting Person: NL INDUSTRIES INC (10% Owner)
Reporting Person: TIMET FINANCE MANAGEMENT CO (10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2005-03-28	Common Stock $0.01 par value	J	1000	$43.11	Disposed	17821761	Indirect
2005-03-28	Common Stock $0.01 par value	J	1000	$43.13	Disposed	17820761	Indirect
2005-03-28	Common Stock $0.01 par value	J	1000	$43.15	Disposed	17819761	Indirect
2005-03-28	Common Stock $0.01 par value	J	1000	$43.50	Disposed	17818761	Indirect
2005-03-28	Common Stock $0.01 par value	J	1000	$43.51	Disposed	17817761	Indirect
2005-03-28	Common Stock $0.01 par value	J	1000	$43.75	Disposed	17816761	Indirect
2005-03-29	Common Stock $0.01 par value	J	266229	—	Disposed	17550532	Indirect
2005-03-29	Common Stock $0.01 par value	J	1700	$43.64	Disposed	17548832	Indirect
2005-03-29	Common Stock $0.01 par value	J	1600	$44.26	Disposed	17547232	Indirect
2005-03-29	Common Stock $0.01 par value	J	7500	$44.3	Disposed	17539732	Indirect
2005-03-29	Common Stock $0.01 par value	J	5100	$44.5	Disposed	17534632	Indirect
2005-03-29	Common Stock $0.01 par value	J	1100	$44.75	Disposed	17533532	Indirect
2005-03-29	Common Stock $0.01 par value	J	5400	$45	Disposed	17528132	Indirect
2005-03-29	Common Stock $0.01 par value	J	5000	$45.25	Disposed	17523132	Indirect
2005-03-29	Common Stock $0.01 par value	J	4000	$45.5	Disposed	17519132	Indirect
2005-03-29	Common Stock $0.01 par value	J	221319	—	Acquired	27840953	Indirect
2005-03-29	Common Stock $0.01 par value	J	1218	—	Acquired	5203	Indirect

Footnotes

F1: 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.

F2: 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.

F3: On March 29, 2005, NL Industries, Inc. ("NL") distributed (the "Distribution") to its shareholders approximately 0.005 of a
share of common
stock of Kronos Worldwide, Inc. ("Kronos Worldwide"), for every share of NL common stock outstanding as
of the close of business on March 14, 2005, the record date for the Distribution. In the aggregate, NL distributed 266,229
shares of Kronos Worldwide common stock to holders of NL common stock.

F4: 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.

F5: 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.