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)
                                 August 4, 2006
                                ----------------

                             Kronos Worldwide, Inc.
             ------------------------------------------------------
             (Exact name of Registrant as specified in its charter)

    Delaware                         1-31763                    76-0294959
- -------------------              ------------------          -----------------
 (State or other                   (Commission                (IRS Employer
 jurisdiction of                   File Number)               Identification
  incorporation)                                                  No.)

  5430 LBJ Freeway, Suite 1700, Dallas, Texas             75240-2697
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     (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):

[   ]   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 2.02 Results of Operations and Financial Condition. Item 7.01 Regulation FD Disclosure. Pursuant to Items 2.02 and 7.01 of this current report, the registrant hereby furnishes the information set forth in its press release issued on August 4, 2006, 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 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. (c) Exhibits. Item No. Exhibit Index ---------- ---------------------------------------- 99.1 Press Release dated August 4, 2006 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 ---------------------- A. Andrew R. Louis Assistant Secretary Date: August 4, 2006

INDEX TO EXHIBITS Exhibit No. Description - ----------- -------------------------------------------------- 99.1 Press Release dated August 4, 2006 issued by the registrant.

Kronos Worldwide, Inc.                  Contact:   Gregory M. Swalwell
Three Lincoln Centre                               Vice President, Finance
5430 LBJ Freeway, Suite 1700                         and Chief Financial Officer
Dallas, TX  75240-2697                             (972) 233-1700
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News Release
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[LOGO GOES HERE]

FOR IMMEDIATE RELEASE


                 KRONOS WORLDWIDE REPORTS SECOND QUARTER RESULTS


DALLAS,   TEXAS...August  4,  2006...Kronos  Worldwide,  Inc.  (NYSE:KRO)  today
reported net income for the second quarter of 2006 of $13.6 million, or $.28 per
diluted share,  compared with net income of $32.9  million,  or $.67 per diluted
share,  in the second quarter of 2005. For the first six months of 2006,  Kronos
reported net income of $28.6 million,  or $.58 per diluted share,  compared with
net income of $54.3 million, or $1.11 per diluted share, in the first six months
of 2005.

Net sales of $345.1 million in the second quarter of 2006 were $33.4 million, or
11%, higher than the second quarter of 2005. Net sales of $649.4 million for the
first six months of 2006 were $45.9  million,  or 8%,  higher than the first six
months of 2005. Net sales  increased in the second quarter of 2006 primarily due
to higher TiO2 sales  volumes,  partially  offset by lower  average TiO2 selling
prices,  and the unfavorable effect of fluctuations in foreign currency exchange
rates,  which decreased sales by approximately $4 million.  For the year-to-date
period, net sales increased due to higher TiO2 sales volumes,  as well as higher
average TiO2  selling  prices,  which was  partially  offset by the  unfavorable
effect of fluctuations in foreign currency  exchange rates,  decreasing sales by
approximately  $19 million.  The table at the end of this release shows how each
of these items impacted the overall increase in sales.

The  Company's  TiO2 segment  profit (see  description  of non-GAAP  information
below) for the  second  quarter of 2006 was $38.4  million  compared  with $59.2
million in the second  quarter of 2005,  and was $74.6 million for the first six
months of 2006  compared  with $107.2  million for the first six months of 2005.
Segment profit  decreased in the second quarter of 2006,  compared to the second
quarter  2005,  due to the net effects of lower  average  TiO2  selling  prices,
higher manufacturing costs,  particularly raw materials and energy costs, higher
sales  volumes,  and the effect of  fluctuations  in foreign  currency  exchange
rates, which negatively impacted segment profit comparisons by approximately $11
million.  Full  year  segment  profit  decreased  primarily  due to  the  higher
manufacturing  costs,  partially  offset by higher average TiO2 selling  prices,
higher  sales  volumes,  and the  effect of  fluctuations  in  foreign  currency
exchange  rates,  which  negatively   impacted  segment  profit  comparisons  by
approximately $16 million.

The  Company's  second  quarter 2006 TiO2 sales  volumes  increased 14% from the
second quarter of 2005,  primarily due to higher sales volumes in the US, Europe
and export markets offsetting the effects of lower sales volumes in Canada. TiO2
sales volumes for the first six months of 2006  increased 11% from the first six
months of 2005. The Company's TiO2  production  volumes were 2% and 3% higher in
the second quarter and first six months of 2006 respectively, as compared to the
same periods in 2005, with operating rates at near full capacity in all periods.
The Company's  finished goods  inventories at June 30, 2006,  which  represented
approximately 2 months of average sales,  were lower compared to March 31, 2006.
The Company's TiO2 sales and production  volumes in the first six months of 2006
were both records for Kronos.

The  Company's  results  in the  second  quarter  of 2005  include a  securities
transaction  gain of $5.4 million ($3.5 million,  or $.07 per diluted share, net
of income taxes) related to a gain on the sale of the company's passive interest
in a Norwegian smelting operation.


As previously reported, in April 2006 the Company's wholly-owned subsidiary, Kronos International, Inc. ("KII") issued an aggregate of euro 400 million principal amount of new 6.5% Senior Secured Notes due April 2013. KII used the proceeds from the issuance of the 6.5% Senior Secured Notes to redeem all of its 8.875% Senior Secured Notes in May 2006 at 104.437% of the aggregate principal amount of euro 375 million. The Company recognized a $22.3 million pre-tax charge ($14.8 million, or $.30 per diluted share, net of income tax benefit) in the second quarter of 2006 related to the early extinguishment of the 8.875% Senior Secured Notes. Other interest income increased for the second quarter and the first six months of 2006, due primarily to the interest earned from the net proceeds of the new 6.5% Senior Secured Notes which were held in escrow for approximately one month until the 8.875% Senior Secured Notes were redeemed. The Company's income tax benefit in the first six months of 2006 includes an aggregate tax benefit of $12.6 million, or $.26 per diluted share ($11.6 million, or $.24 per diluted share, for the second quarter of 2006) related to the withdrawal of certain income tax assessments previously made by the Belgian and Norwegian tax authorities, the favorable resolution of certain income tax issues related to our German and Belgian operations and the enactment of a reduction in the Canadian federal income tax rate. The statements in this release relating to matters that are not historical facts are forward-looking statements that represent management's beliefs and assumptions based on currently available information. Although the Company believes that the expectations reflected in such forward-looking statements are reasonable, it cannot give any assurances that these expectations will prove to be correct. Such statements by their nature involve substantial risks and uncertainties that could significantly impact expected results, and actual future results could differ materially from those described in such forward-looking statements. While it is not possible to identify all factors, the Company continues to face many risks and uncertainties. The factors that could cause actual future results to differ materially include, but are not limited to, the following: o Future supply and demand for the Company's products, o The extent of the dependence of certain of the Company's businesses on certain market sectors, o The cyclicality of the Company's businesses, o Customer inventory levels (such as the extent to which the Company's customers may, from time to time, accelerate purchases of TiO2 in advance of anticipated price increases or defer purchases of TiO2 in advance of anticipated price decreases), o Changes in raw material and other operating costs (such as energy costs), o The possibility of labor disruptions, o General global economic and political conditions (such as changes in the level of gross domestic product in various regions of the world and the impact of such changes on demand for TiO2), o Competitive products and substitute products, o Customer and competitor strategies, o The impact of pricing and production decisions, o Competitive technology positions, o The introduction of trade barriers, o Fluctuations in currency exchange rates (such as changes in the exchange rate between the U.S. dollar and each of the euro, the Norwegian kroner and the Canadian dollar), o Operating interruptions (including, but not limited to, labor disputes, leaks, natural disasters, fires, explosions, unscheduled or unplanned downtime and transportation interruptions), o The timing and amounts of insurance recoveries, o The ability of the Company to renew or refinance credit facilities, o The ultimate outcome of income tax audits, tax settlement initiatives or other tax matters, o The ultimate ability to utilize income tax attributes, the benefit of which has been recognized under the "more-likely-than-not" recognition criteria, o Environmental matters (such as those requiring emission and discharge standards for existing and new facilities), o Government laws and regulations and possible changes therein, o The ultimate resolution of pending litigation, and o Possible future litigation. Should one or more of these risks materialize (or the consequences of such a development worsen), or should the underlying assumptions prove incorrect, actual results could differ materially from those forecasted or expected. The Company disclaims any intention or obligation to update or revise any forward-looking statement whether as a result of changes in information, future events or otherwise. In an effort to provide investors with additional information regarding the Company's results of operations as determined by accounting principles generally accepted in the placecountry-regionUnited States of America ("GAAP"), the Company has disclosed certain non-GAAP information, which the Company believes provides useful information to investors: o The Company discloses segment profit, which is used by the Company's management to assess the performance of the Company's TiO2 operations. The Company believes disclosure of segment profit provides useful information to investors because it allows investors to analyze the performance of the Company's TiO2 operations in the same way that the Company's management assesses performance. The Company defines segment profit as income before income taxes, interest expense and certain general corporate items. Corporate items excluded from the determination of segment profit include corporate expense and interest income not attributable to the Company's TiO2 operations. Kronos Worldwide, Inc. is a major international producer of titanium dioxide pigments.

KRONOS WORLDWIDE, INC. CONDENSED CONSOLIDATED STATEMENTS OF INCOME (In millions, except per share and metric ton data) (Unaudited) Three months ended Six months ended June 30, June 30, ----------------------------------------------------- 2005 2006 2005 2006 ----------------------------------------------------- Net sales $ 311.7 $ 345.1 $ 603.5 $ 649.4 Cost of sales 217.1 263.1 424.7 492.6 --------- --------- --------- --------- Gross margin 94.6 82.0 178.8 156.8 Selling, general and administrative expense 37.8 41.3 75.1 79.1 Other operating income (expense): Currency transaction gains (losses), net 2.4 (2.0) 3.3 (2.9) Disposition of property & equipment (.1) (.7) (.1) (1.1) Other income - - .1 - (1.4 (1.2) (2.9) (2.6) --------- --------- --------- --------- Income from operations 57.7 36.8 104.1 71.1 Other income (expense): Trade interest income .1 .4 .2 .9 Other interest income .3 .9 .7 1.0 Securities transaction gain 5.4 - 5.4 - Loss on prepayment of debt - (22.3) - (22.3) Interest expense (11.6) (13.1) (23.4) (23.8) --------- --------- --------- --------- Income before income taxes 51.9 2.7 87.0 26.9 Provision for income taxes (benefit) 19.0 (10.9) 32.7 (1.7) --------- --------- --------- --------- Net income $ 32.9 $ 13.6 $ 54.3 $ 28.6 ========= ========= ========= ========= Basic and diluted net income per share $ .67 $ .28 $ 1.11 $ .58 ========= ========= ========= ========= Basic and diluted weighted-average shares used in the calculation of net income per share 48.9 48.9 48.9 48.9 TiO2 data - metric tons in thousands: Sales volumes 122 139 237 264 Production volumes 127 130 249 257

KRONOS WORLDWIDE, INC. RECONCILIATION OF SEGMENT PROFIT TO INCOME FROM OPERATIONS (In millions) (Unaudited) Three months ended Six months ended June 30, June 30, ----------------------------------------------------- 2005 2006 2005 2006 ----------------------------------------------------- Segment profit $ 59.2 $ 38.4 $ 107.2 $ 74.6 Adjustments: Trade interest income (.1) (.4) (.2) (.9) Corporate expense (1.4 (1.2) (2.9) (2.6) --------- --------- ---------- ---------- Income from operations $ 57.7 $ 36.8 $ 104.1 $ 71.1 ========= ========= ========== ========== IMPACT OF PERCENTAGE CHANGE IN SALES (Unaudited) Three months ended Six months ended June 30, June 30, 2006 vs. 2005 2006 vs. 2005 ------------------- ---------------- Percent change in sales: TiO2 product pricing -1% 1% TiO2 sales volume 14% 11% TiO2 product mix -1% -1% Changes in foreign currency exchange rates -1% -3% ---- ---- Total 11% 8% ==== ====