KRONOS WORLDWIDE INC — Director's Dealing 2012

May 15, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: KRONOS WORLDWIDE INC (KRO)
CIK: 0001257640
Period of Report: 2012-05-14

Reporting Person: SIMMONS GLENN R (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-05-14	Common Stock $0.01 par value	J	100	$20.27	Acquired	12550	Indirect
2012-05-14	Common Stock $0.01 par value	J	400	$20.28	Acquired	12950	Indirect
2012-05-14	Common Stock $0.01 par value	J	100	$20.29	Acquired	13050	Indirect
2012-05-14	Common Stock $0.01 par value	J	200	$20.30	Acquired	13250	Indirect
2012-05-14	Common Stock $0.01 par value	J	600	$20.31	Acquired	13850	Indirect
2012-05-14	Common Stock $0.01 par value	J	3600	$20.33	Acquired	17450	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock $0.01 par value	30812	Direct

Footnotes

F1: Open market purchase by the reporting person's spouse.

F2: Directly held by the reporting person's spouse. The reporting person disclaims beneficial ownership of any shares of the issuer's common stock that his spouse holds.