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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1257640	Kronos Worldwide Inc	KRO	Industrial Inorganic Chemicals (2810)	760294959

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1037854	C Harold Simmons	5430 Lbj Freeway, Suite 1700 Dallas TX 75240	Chairman Of The Board	Yes	Yes	Yes	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock $0.01 Par Value	Acquisiton	2010-07-07	53	$18.90	244,462	No	4	P	Direct
Common Stock $0.01 Par Value	Acquisiton	2010-07-07	100	$19.00	244,562	No	4	P	Direct
Common Stock $0.01 Par Value	Acquisiton	2010-07-07	300	$19.00	244,862	No	4	P	Direct
Common Stock $0.01 Par Value	Acquisiton	2010-07-07	100	$19.19	244,962	No	4	P	Direct
Common Stock $0.01 Par Value	Acquisiton	2010-07-07	400	$19.20	245,362	No	4	P	Direct
Common Stock $0.01 Par Value	Acquisiton	2010-07-07	1,400	$19.29	246,762	No	4	P	Direct
Common Stock $0.01 Par Value	Acquisiton	2010-07-07	818	$19.50	247,580	No	4	P	Direct
Common Stock $0.01 Par Value	Acquisiton	2010-07-09	5,000	$19.25	252,580	No	4	P	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	P	Direct
No	4	P	Direct
No	4	P	Direct
No	4	P	Direct
No	4	P	Direct
No	4	P	Direct
No	4	P	Direct
No	4	P	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock $0.01 Par Value	28,995,021	Indirect	by Valhi
Common Stock $0.01 Par Value	17,609,635	Indirect	by NL
Common Stock $0.01 Par Value	79,567	Indirect	by TFMC
Common Stock $0.01 Par Value	54,856	Indirect	by Spouse
Common Stock $0.01 Par Value	2,686	Indirect	by Contran

Footnotes

Directly held by Valhi, Inc. See the Additional Information filed as Exhibit 99 to this statement for a description of the relationship to the reporting person.
Directly held by NL Industries, Inc. See the Additional Information filed as Exhibit 99 to this statement for a description of the relationship to the reporting person.
Directly held by TIMET Finance Management Company. See the Additional Information filed as Exhibit 99 to this statement for a description of the relationship to the reporting person.
Directly held by the reporting person's spouse. The reporting person disclaims beneficial ownership of, and a pecuniary interest in, any shares of the issuer's common stock that his spouse holds.
Directly held by Contran Corporation. See the Additional Information filed as Exhibit 99 to this statement for a description of the relationship to the reporting person.