8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C.   20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of the earliest event reported)

April 21, 2010

Kronos Worldwide, Inc.

(Exact name of registrant as specified in its charter)

Delaware	1-31763	76-0294959
(State or other jurisdiction of incorporation)	(Commission File Number)	(IRS Employer Identification No.)
5430 LBJ Freeway, Suite 1700, Dallas, Texas			75240-2697
(Address of principal executive offices)			(Zip Code)

Registrant’s telephone number, including area code

(972) 233-1700

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2):

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 7.01 Regulation FD Disclosure.

The registrant hereby furnishes the information set forth in the press release issued on April 21, 2010, a copy of which is attached hereto as Exhibit 99.1 and incorporated herein by reference.

The information, including the exhibit, the registrant furnishes in this report is not deemed “filed” for purposes of section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section.  Registration statements or other documents filed with the U.S. Securities and Exchange Commission shall not incorporate this information by reference, except as otherwise expressly stated in such filing.

Item 9.01 Financial Statements and Exhibits.

(d)	Exhibits
	Item No.	Exhibit Index
	99.1	Press release dated April 21, 2010 issued by the registrant.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	KRONOS WORLDWIDE, INC.
	(Registrant)
	By:         /s/ A. Andrew R. Louis
Date:  April 21, 2010	A. Andrew R. Louis, Secretary

INDEX TO EXHIBITS

Item No.	Exhibit Index
99.1	Press release dated April 21, 2010 issued by the registrant.

EX-99.1

KRONOS WORLDWIDE, INC. ANNOUNCES A PRICE INCREASE FOR ALL TITANIUM DIOXIDE PRODUCTS SOLD IN EUROPE

CRANBURY, NEW JERSEY – April 21, 2010 – Kronos Worldwide, Inc. (NYSE:  KRO) today announced a price increase for all titanium dioxide products sold in Western Europe, Eastern Europe and Turkey.

Effective May 15, 2010, prices for all Kronos® titanium dioxide products sold in Western Europe will be increased by 100 Euro per metric ton.

Effective May 15, 2010 prices for all Kronos® titanium dioxide products sold in Eastern Europe and in Turkey will be increased by 150 Euro per metric ton (or equivalent in other currencies).

Kronos Worldwide, Inc. is a major international producer of titanium dioxide products.