KRONOS WORLDWIDE INC — Director's Dealing 2007

Oct 31, 2007

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: KRONOS WORLDWIDE INC (KRO)
CIK: 0001257640
Period of Report: 2007-10-29

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
2007-10-29	Common Stock $0.01 par value	P	500	$17.78	Acquired	23918	Direct
2007-10-29	Common Stock $0.01 par value	P	100	$17.79	Acquired	24018	Direct
2007-10-29	Common Stock $0.01 par value	P	500	$17.84	Acquired	24518	Direct
2007-10-29	Common Stock $0.01 par value	P	1200	$17.87	Acquired	25718	Direct
2007-10-29	Common Stock $0.01 par value	P	700	$17.88	Acquired	26418	Direct
2007-10-29	Common Stock $0.01 par value	P	900	$17.92	Acquired	27318	Direct
2007-10-29	Common Stock $0.01 par value	P	1200	$17.95	Acquired	28518	Direct
2007-10-29	Common Stock $0.01 par value	P	4900	$18.00	Acquired	33418	Direct
2007-10-30	Common Stock $0.01 par value	P	100	$17.82	Acquired	33518	Direct
2007-10-30	Common Stock $0.01 par value	P	200	$18.22	Acquired	33718	Direct
2007-10-30	Common Stock $0.01 par value	P	200	$18.25	Acquired	33918	Direct
2007-10-30	Common Stock $0.01 par value	P	100	$17.63	Acquired	34018	Direct
2007-10-30	Common Stock $0.01 par value	P	100	$17.67	Acquired	34118	Direct
2007-10-30	Common Stock $0.01 par value	P	100	$17.69	Acquired	34218	Direct
2007-10-30	Common Stock $0.01 par value	P	200	$18.38	Acquired	34418	Direct
2007-10-30	Common Stock $0.01 par value	P	200	$18.40	Acquired	34618	Direct
2007-10-30	Common Stock $0.01 par value	P	200	$18.45	Acquired	34818	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock $0.01 par value	28995021	Indirect
Common Stock $0.01 par value	17516132	Indirect
Common Stock $0.01 par value	5203	Indirect
Common Stock $0.01 par value	36356	Indirect

Footnotes

F1: Shares purchased in open market transactions.

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.

F5: Directly held by the Reporting Person's spouse. The Reporting Person disclaims beneficial ownership of these shares.