KRONOS WORLDWIDE INC

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2026

(unaudited)

Note 1 - Organization and basis of presentation:

Organization-** **At March 31, 2026 Valhi, Inc. (NYSE: VHI) held approximately 50% of our outstanding common stock and a wholly-owned subsidiary of NL Industries, Inc. (NYSE: NL) held approximately 31% of our common stock. Valhi owned approximately 83% of NL’s outstanding common stock and a wholly-owned subsidiary of Contran Corporation held approximately 91% of Valhi’s outstanding common stock. A majority of Contran’s outstanding voting stock is held directly by Lisa K. Simmons and by family stockholders (Thomas C. Connelly (the husband of Ms. Simmons’ late sister), a family-owned entity and various family trusts established for the benefit of Ms. Simmons, Mr. Connelly and their children) who are required to vote their shares of Contran voting stock in the same manner as Ms. Simmons. Such voting rights are personal to Ms. Simmons and last through April 22, 2030. The remainder of Contran’s outstanding voting stock is held by another trust (the “Family Trust”), which was established for the benefit of Ms. Simmons and her late sister and their children and for which a third-party financial institution serves as trustee. Consequently, at March 31, 2026, Ms. Simmons and the Family Trust may be deemed to control Contran, and therefore may be deemed to indirectly control the wholly-owned subsidiary of Contran, Valhi, NL and us.

Basis of presentation- The unaudited Condensed Consolidated Financial Statements contained in this Quarterly Report have been prepared on the same basis as the audited Consolidated Financial Statements in our Annual Report on Form 10-K for the year ended December 31, 2025 that we filed with the Securities and Exchange Commission (“SEC”) on March 9, 2026 (“2025 Annual Report”). In our opinion, we have made all necessary adjustments (which include only normal recurring adjustments), in order to state fairly, in all material respects, our consolidated financial position, results of operations and cash flows as of the dates and for the periods presented. We have condensed the Consolidated Balance Sheet at December 31, 2025 contained in this Quarterly Report as compared to our audited Consolidated Financial Statements at that date, and we have omitted certain information and footnote disclosures (including those related to the Consolidated Balance Sheet at December 31, 2025) normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”). Our results of operations for the interim period ended March 31, 2026 may not be indicative of our operating results for the full year. The Condensed Consolidated Financial Statements contained in this Quarterly Report should be read in conjunction with our 2025 Consolidated Financial Statements contained in our 2025 Annual Report.

Unless otherwise indicated, references in this report to “we,” “us” or “our” refer to Kronos Worldwide, Inc. and its subsidiaries (NYSE: KRO) taken as a whole.

Note 2 - TiO 2 segment information:

Our chief operating decision maker (“CODM”) evaluates the TiO 2 segment’s operating performance based on net income (loss) and segment profit (a non-GAAP measure), which we define as net income (loss) before income tax expense and certain general corporate items. These general corporate items include corporate expense and the components of other income (expense) except for trade interest income. Differences between segment profit and the amounts included in consolidated net income (loss) are shown in the table below. Trade interest income included in the calculation of segment profit is not significantfor the three months ended March 31, 2025 or 2026. Substantially all depreciation expense is included in the calculation of segment profit for the three months ended March 31, 2026.

Note 3 - Accounts and other receivables, net:

Note 4 - Inventories, net:

Note 5 - Marketable securities:

Our marketable securities consist of investments in the publicly-traded shares of our related party, Valhi. Our marketable securities are accounted for as available-for-sale securities, which are carried at fair value using quoted market prices in active markets for each marketable security and represent a Level 1 input within the fair value hierarchy. Unrealized gains or losses on equity securities are recognized in other income (expense) - marketable equity securities on our Condensed Consolidated Statements of Operations.

At December 31, 2025 and March 31, 2026, we held approximately 144,000 shares of Valhi’s common stock. At December 31, 2025 and March 31, 2026, the per share quoted market price of Valhi’s common stock was $12.05 and $14.30, respectively.

The Valhi common stock we own is subject to the restrictions on resale pursuant to certain provisions of the SEC Rule 144. In addition, as a majority-owned subsidiary of Valhi we cannot vote our shares of Valhi common stock under Delaware General Corporation Law, but we do receive dividends from Valhi on these shares when declared and paid.

Note 6 - Long-term debt:

9.50%* Senior Secured Notes due 2029* - At March 31, 2026, the carrying value of the 9.50% Senior Secured Notes due 2029 (€426.174 million aggregate principal amount outstanding) is stated net of $8.4 million of unamortized premium and $6.2 million of unamortized debt issuance costs (at December 31, 2025 the amounts were $9.0 million and $6.9 million, respectively).

Revolving credit facility (the “Global Revolver”)- During the first three months of 2026, we borrowed $155.9 million and repaid $97.8 million under our $350 million Global Revolver. The average interest rate on outstanding borrowings under this facility during the three months ended March 31, 2026 was 4.5%. At March 31, 2026, the average interest rate on outstanding borrowings was 4.5% and we had borrowing availability of approximately $287 million less any amounts outstanding under this facility.

Other - We are in compliance with all of our debt covenants at March 31, 2026.

Note 7 - Accounts payable and accrued liabilities:

See Note 15 for additional information related to accrued severance costs.

Note 8 - Other noncurrent liabilities:

Note 9 - Revenue recognition:

The following table disaggregates our net sales by place of manufacture (point of origin) and to the location of the customer (point of destination), which are the categories that depict how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors.

Note 10 - Employee benefit plans:

The components of net periodic defined benefit pension cost are presented in the table below.

We expect our 2026 contributions for our pension plans to be approximately $17 million.

Note 11 - Income taxes:

The provision for income taxes and the difference between such provision for income taxes and the amount that would be expected using the U.S. federal statutory income tax rate of 21% are presented below.

The amount shown in the preceding table of our income tax rate reconciliation for incremental tax benefit on losses of subsidiary represents current and deferred U.S. income tax benefits attributable to one of our non-U.S. subsidiaries which is treated as a dual resident for U.S. income tax purposes.

On July 4, 2025, the One Big Beautiful Bill Act was signed into law in the United States. It did not have a material impact on our consolidated financial statements.

Tax authorities are examining certain of our U.S. and non-U.S. tax returns and may propose tax deficiencies, including penalties and interest. In March 2026, we received notices of assessment from the German tax authorities for tax years 2019 through 2021. We disagree with the assessments and have filed notice of appeal. However, due to the uncertainty of the appeal and the complexity of the appeal process, during the first quarter of 2026 we recorded net income tax expense of $2.0 million to establish an uncertain tax position, net of amounts expected to be received from other taxing jurisdictions.

We believe we have adequate accruals for additional taxes and related interest expense which could ultimately result from tax examinations. We believe the ultimate disposition of tax examinations should not have a material adverse effect on our consolidated financial position, results of operations or liquidity.

Note 12 - Stockholders’ equity:

Changes in accumulated other comprehensive loss are presented in the table below. See Note 10 for discussion of our defined benefit pension plans.

Note 13 - Commitments and contingencies:

We are involved in various environmental, contractual, product liability, patent (or intellectual property), employment and other claims and disputes incidental to our business. At least quarterly our management discusses and evaluates the status of any pending litigation to which we are a party. The factors considered in such evaluation include, among other things, the nature of such pending cases, the status of such pending cases, the advice of legal counsel and our experience in similar cases (if any). Based on such evaluation, we make a determination as to whether we believe (i) it is probable a loss has been incurred, and if so if the amount of such loss (or a range of loss) is reasonably estimable, or (ii) it is reasonably possible but not probable a loss has been incurred, and if so if the amount of such loss (or a range of loss) is reasonably estimable, or (iii) the probability a loss has been incurred is remote. We have not accrued any amounts for litigation matters because it is not reasonably possible, we have incurred a loss that would be material to our consolidated financial statements, results of operations or liquidity.

Note 14 - Financial instruments:

See Note 5 for information on how we determine fair value of our marketable securities.

The following table presents the financial instruments that are not carried at fair value but which require fair value disclosure:

At December 31, 2025 and March 31, 2026, the estimated market price of our 9.50% Senior Secured Notes due 2029 was €937 and €853 per €1,000 principal amount, respectively. The fair value of our Senior Secured Notes due 2029 was based on quoted market prices; however, these prices represented Level 2 inputs because the market in which the notes trade was not active. Due to the variable interest rate, the carrying amountof our revolving credit facility is deemed to approximate fair value. Due to their near-term maturities, the carrying amounts of accounts receivable and accounts payable are considered equivalent to fair value. See Notes 3 and 7.

Note 15 – Restructuring costs:

In the fourth quarter of 2025, we initiated a restructuring plan through workforce reductions which is supporting an improved current and longer-term cost structure. These workforce reductions impacted approximately 226 positions with a substantial portion of such reductions accomplished through involuntary programs. A portion of the reductions was also accomplished through voluntary programs, for which eligible workforce reduction costs were recognized at the time both the employee and employer were irrevocably committed to the terms of the separation. During the fourth quarter of 2025, we recognized an aggregate $10.3 million charge related to these workforce reductions. Accrued severance costs remaining at March 31, 2026 are expected to be substantially paid in 2026 and are included in accounts payable and accrued liabilities – other on our Condensed Consolidated Balance Sheet, see Note 7. We do not expect to accrue any further material amounts for the workforce reductions.

A summary of the activity in our accrued restructuring costs for the first three months of 2026 is shown in the table below:

Note 16**-**** Recent accounting pronouncements:**

In November 2024, the FASB issued ASU No. 2024-03,Reporting Comprehensive Income - Expense Disaggregation Disclosures. The ASU requires additional information about specific expense categories in the notes to financial statements for both interim and annual reporting periods. The ASU is effective for us beginning with our 2027 Annual Report, and for interim reporting, in the first quarter of 2028, with early adoption permitted. We are in the process of evaluating the additional disclosure requirements.