KRONOS WORLDWIDE INC — Director's Dealing 2007

Dec 20, 2007

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: KRONOS WORLDWIDE INC (KRO)
CIK: 0001257640
Period of Report: 2007-12-20

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
2007-12-20	Common Stock $0.01 par value	P	400	$15.90	Acquired	134767	Direct
2007-12-20	Common Stock $0.01 par value	P	100	$15.92	Acquired	134867	Direct
2007-12-20	Common Stock $0.01 par value	P	100	$15.95	Acquired	134967	Direct
2007-12-20	Common Stock $0.01 par value	P	300	$16.00	Acquired	135267	Direct
2007-12-20	Common Stock $0.01 par value	P	100	$15.91	Acquired	135367	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock $0.01 par value	28995021	Indirect
Common Stock $0.01 par value	17516312	Indirect
Common Stock $0.01 par value	5203	Indirect
Common Stock $0.01 par value	36356	Indirect

Footnotes

F1: 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.

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: 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.

F4: Directly held by the Reporting Person's spouse. The Reporting Person disclaims beneficial ownership of these shares.