NL INDUSTRIES INC

December 31, 2024

Note 1 – Summary of significant accounting policies:

Nature of our business –NL Industries, Inc. (NYSE: NL) is primarily a holding company. We operate in the component products industry through our majority-owned subsidiary, CompX International Inc. (NYSE American: CIX). We operate in the chemicals industry through our noncontrolling interest in Kronos Worldwide, Inc. (NYSE: KRO).

Organization – At December 31, 2024, Valhi, Inc. (NYSE: VHI) held approximately 83% of our 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 December 31, 2024 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 and us.

Unless otherwise indicated, references in this report to “we,” “us” or “our” refer to NL Industries, Inc. and its subsidiaries and affiliate, Kronos, taken as a whole.

Management’s estimates – In preparing our financial statements in conformity with accounting principles generally accepted in the United States of America (GAAP), we are required to make estimates and assumptions that affect the reported amounts of our assets and liabilities and disclosures of contingent assets and liabilities at each balance sheet date and the reported amounts of our revenues and expenses during each reporting period. Actual results may differ significantly from previously-estimated amounts under different assumptions or conditions.

Principles of consolidation – Our Consolidated Financial Statements include the financial position, results of operations and cash flows of NL and our wholly-owned and majority-owned subsidiaries, including CompX. We account for the 13% of CompX stock we do not own as a noncontrolling interest. We eliminate all material intercompany accounts and balances. Changes in ownership of our wholly-owned and majority-owned subsidiaries are accounted for as equity transactions with no gain or loss recognized on the transaction unless there is a change in control.

Currency translation – The financial statements of Kronos’ non-U.S. subsidiaries are translated to U.S. dollars. The functional currency of Kronos’ non-U.S. subsidiaries is generally the local currency of their country. Accordingly, Kronos translates the assets and liabilities at year-end rates of exchange, while it translates its revenues and expenses at average exchange rates prevailing during the year. We accumulate the resulting translation adjustments in stockholders’ equity as part of accumulated other comprehensive income (loss), net of related deferred income taxes. Kronos recognizes currency transaction gains and losses in income which is reflected as part of our equity in earnings (losses) of Kronos.

Cash and cash equivalents – We classify bank time deposits and highly liquid investments, including government and commercial notes and bills, with original maturities of three months or less as cash equivalents.

Restricted cash and cash equivalents – We classify cash equivalents that have been segregated or are otherwise limited in use as restricted. Such restrictions include cash pledged as collateral with respect to performance obligations or letters of credit required by regulatory agencies for certain environmental remediation sites and cash pledged as collateral with respect to certain workers compensation liabilities or legal settlements. To the extent the restricted amount relates to

a recognized liability, we classify such restricted amount as either a current or noncurrent asset to correspond with the classification of the liability. To the extent the restricted amount does not relate to a recognized liability, we classify restricted cash as a current asset. Restricted cash equivalents classified as a current asset or a noncurrent asset are presented separately on our Consolidated Balance Sheets.

Marketable securities and securities transactions – We carry marketable debt and equity securities at fair value. Accounting Standards Codification (“ASC”) Topic 820,Fair Value Measurements and Disclosures, establishes a consistent framework for measuring fair value and (with certain exceptions) this framework is generally applied to all financial statement items required to be measured at fair value. The standard requires fair value measurements to be classified and disclosed in one of the following three categories:

We classify all of our marketable securities as available-for-sale. We accumulate unrealized gains and losses on marketable debt securities as part of accumulated other comprehensive income (loss), net of related deferred income taxes. We recognize unrealized gains or losses on the marketable equity securities in Marketable equity securities on our Consolidated Statements of Operations. We base realized gains and losses upon the specific identification of the securities sold. See Notes 5 and 11.

Accounts receivable – We provide an allowance for doubtful accounts for known and estimated potential losses arising from sales to customers based on a periodic review of these accounts. See Note 3.

Inventories and cost of sales – We state inventories at the lower of cost or net realizable value. We record a provision for obsolete and slow-moving inventories. We generally base inventory costs for all inventory categories on an average cost that approximates the first-in, first-out method. Inventories include the costs for raw materials, the cost to manufacture the raw materials into finished goods and overhead. Depending on the inventory’s stage of completion, our manufacturing costs can include the costs of packing and finishing, utilities, maintenance and depreciation, shipping and handling, and salaries and benefits associated with our manufacturing process. We allocate fixed manufacturing overhead costs based on normal production capacity. Unallocated overhead costs resulting from periods with abnormally low production levels are charged to expense as incurred. As inventory is sold to third parties, we recognize the cost of sales in the same period that the sale occurs. We periodically review our inventory for estimated obsolescence or instances when inventory is no longer marketable for its intended use and we record any write-down equal to the difference between the cost of inventory and its estimated net realizable value based on assumptions about alternative uses, market conditions and other factors. See Note 4.

Investment in Kronos Worldwide, Inc. – We account for our 31% non-controlling interest in Kronos by the equity method. Distributions received from Kronos are classified for statement of cash flow purposes using the “nature of distribution” approach under ASC Topic 230. See Note 6.

Goodwill – Goodwill represents the excess of cost over fair value of individual net assets acquired in business combinations. Goodwill is not subject to periodic amortization. We evaluate goodwill for impairment annually, or when circumstances indicate the carrying value may not be recoverable. See Note 7.

Leases – We enter into various arrangements (or leases) that convey the rights to use and control identified underlying assets for a period of time in exchange for consideration. We lease various facilities and equipment. From time to time, we may also enter into an arrangement in which the right to use and control an identified underlying asset is

embedded in another type of contract. We determine if an arrangement is a lease (including leases embedded in another type of contract) at inception. All of our leases are classified as operating leases under ASC Topic 842Leases. Operating leases are not material.

Property and equipment; depreciation expense – We state property and equipment, including purchased computer software for internal use, at cost. We compute depreciation of property and equipment for financial reporting purposes principally by the straight-line method over the estimated useful lives of 15 to 40 years for buildings and 3 to 20 years for equipment and software. We use the Alternative Depreciation System (“ADS”) for income tax purposes. Upon sale or retirement of an asset, the related cost and accumulated depreciation are removed from the accounts and any gain or loss is recognized in income currently. Expenditures for maintenance, repairs and minor renewals are expensed; expenditures for major improvements are capitalized.

We perform impairment tests when events or changes in circumstances indicate the carrying value may not be recoverable. We consider all relevant factors. We perform impairment tests by comparing the estimated future undiscounted cash flows associated with the asset to the asset’s net carrying value to determine whether impairment exists.

Employee benefit plans – Accounting and funding policies for our defined benefit pension and defined contribution retirement plans are described in Note 11. We also provide certain postretirement benefits other than pensions (OPEB), consisting of health care and life insurance benefits, to certain U.S. retired employees, which are not material. See Note 12.

Income taxes – We, Valhi and our qualifying subsidiaries are members of Contran’s consolidated U.S. federal income tax group (the Contran Tax Group) and we and certain of our qualifying subsidiaries also file consolidated unitary state income tax returns with Contran in qualifying U.S. jurisdictions. As a member of the Contran Tax Group, we are jointly and severally liable for the federal income tax liability of Contran and the other companies included in the Contran Tax Group for all periods in which we are included in the Contran Tax Group. See Note 16. As a member of the Contran Tax Group, we are party to a tax sharing agreement with Valhi and Contran which provides that we compute our provision for income taxes on a separate-company basis using the tax elections made by Contran. Pursuant to our tax sharing agreement, we make payments to or receive payments from Valhi in amounts that we would have paid to or received from the U.S. Internal Revenue Service or the applicable state tax authority had we not been a member of the Contran Tax Group. We made net payments to Valhi for income taxes of $1.1 in 2022, received net refunds from Valhi of $.3 million in 2023 and made net payments to Valhi of $.1 million in 2024.

We recognize deferred income tax assets and liabilities for the expected future tax consequences of temporary differences between the income tax and financial reporting carrying amounts of assets and liabilities, including investments in our subsidiaries and affiliates who are not members of the Contran Tax Group and undistributed earnings of non-U.S. subsidiaries which are not deemed to be permanently reinvested. In addition, we recognize deferred income taxes with respect to the excess of the financial reporting carrying amount over the income tax basis of our direct investment in Kronos common stock because the exemption under GAAP to avoid recognition of such deferred income taxes is not available to us. Deferred income tax assets and liabilities for each tax-paying jurisdiction in which we operate are netted and presented as either a noncurrent deferred income tax asset or liability, as applicable. We periodically evaluate our deferred tax assets in the various taxing jurisdictions in which we operate and adjust any related valuation allowance based on the estimate of the amount of such deferred tax assets that we believe does not meet the more-likely-than-not recognition criteria.

We account for the tax effects of a change in tax law as a component of the income tax provision related to continuing operations in the period of enactment, including the tax effects of any deferred income taxes originally established through a financial statement component other than continuing operations (i.e. other comprehensive income(loss)). Changes in applicable income tax rates over time as a result of changes in tax law, or times in which a deferred income tax asset valuation allowance is initially recognized in one year and subsequently reversed in a later year, can give rise to “stranded” tax effects in accumulated other comprehensive income in which the net accumulated income tax expense (benefit) remaining in accumulated other comprehensive income does not correspond to the then-applicable

income tax rate applied to the pre-tax amount which resides in accumulated other comprehensive income (loss). As permitted by GAAP, our accounting policy is to remove any such stranded tax effect remaining in accumulated other comprehensive income, by recognizing an offset to our provision for income taxes related to continuing operations, only at the time when there is no remaining pre-tax amount in accumulated other comprehensive income. For accumulated other comprehensive income related to currency translation, this would occur only upon the sale or complete liquidation of one of our non-U.S. subsidiaries. For defined pension benefit plans and OPEB plans, this would occur whenever one of our subsidiaries which previously sponsored a defined benefit pension or OPEB plan had terminated such a plan and had no future obligation or plan asset associated with such a plan (such as in 2023 when we terminated our U.K. pension plan).

We record a reserve for uncertain tax positions for tax positions where we believe it is more-likely-than-not our position will not prevail with the applicable tax authorities. The amount of the benefit associated with our uncertain tax positions that we recognize is limited to the largest amount for which we believe the likelihood of realization is greater than 50%. We accrue penalties and interest on the difference between tax positions taken on our tax returns and the amount of benefit recognized for financial reporting purposes. We classify our reserves for uncertain tax positions in a separate current or noncurrent liability, depending on the nature of the tax position. See Note 14.

Environmental remediation costs – We record liabilities related to environmental remediation obligations when estimated future expenditures are probable and reasonably estimable. We adjust these accruals as further information becomes available to us or as circumstances change. We generally do not discount estimated future expenditures to present value. We recognize any recoveries of remediation costs from other parties when we deem their receipt probable. We expense any environmental remediation related legal costs as incurred. See Note 17.

Net sales – Our sales involve single performance obligations to ship our products pursuant to customer purchase orders. In some cases, the purchase order is supported by an underlying master sales agreement, but our purchase order verification notice generally evidences the contract with our customer by specifying the key terms of product and quantity ordered, price and delivery and payment terms. In accordance with ASC Topic 606,*Revenue from Contracts with Customers,*we record revenue when we satisfy our performance obligations to our customers by transferring control of our products to them, which generally occurs at point of shipment or upon delivery. Such transfer of control is also evidenced by transfer of legal title and other risks and rewards of ownership (giving the customer the ability to direct the use of, and obtain substantially all of the benefits of, the product), and our customers becoming obligated to pay us and it is probable we will receive payment. In certain arrangements we provide shipping and handling activities after the transfer of control to our customer (e.g., when control transfers prior to delivery). In such arrangements shipping and handling are considered fulfillment activities, and accordingly, such costs are accrued when the related revenue is recognized.

Revenue is recorded in an amount that reflects the net consideration we expect to receive in exchange for our products. Prices for our products are based on terms specified in published list prices and purchase orders, which generally do not include financing components, noncash consideration or consideration paid to our customers. As our standard payment terms are less than one year, we have elected the practical expedient under ASC 606 and we have not assessed whether a contract has a significant financing component. We state sales net of price, early payment and distributor discounts as well as volume rebates (collectively, variable consideration). Variable consideration, to the extent present, is not material and is recognized as the amount to which we are most-likely to be entitled, using all information (historical, current and forecasted) that is reasonably available to us, and only to the extent that a significant reversal in the amount of the cumulative revenue recognized is not probable of occurring in a future period. Differences, if any, between estimates of the amount of variable consideration to which we will be entitled and the actual amount of such variable consideration have not been material in the past. We occasionally receive partial or full consideration from our customers prior to the completion of our performance obligation (shipment of product). We record estimated deferred revenue on the amount to which we are most likely to be entitled and deferred revenue is recognized into revenue as our performance obligation has been satisfied. Deferred revenue has not been material in the past. We report any tax assessed by a governmental authority that we collect from our customers that is both imposed on and concurrent with our revenue-producing activities (such as sales, use, value added and excise taxes) on a net basis (meaning we do not recognize these taxes either in our revenues or in our costs and expenses).

Frequently, we receive orders for products to be delivered over dates that may extend across reporting periods. We invoice for each delivery upon shipment and recognize revenue for each distinct shipment when all sales recognition criteria for that shipment have been satisfied. As scheduled delivery dates for these orders are within a one year period, under the optional exemption provided by ASC 606, we do not disclose sales allocated to future shipments of partially completed contracts.

Selling, general and administrative expenses; advertising costs; research and development costs – Selling, general and administrative expenses include costs related to marketing, sales, distribution, research and development, and administrative functions such as accounting, treasury and finance, as well as costs for salaries and benefits, travel and entertainment, promotional materials and professional fees. We expense advertising costs and research and development costs as incurred. Advertising costs were approximately $.4 million in 2022 and $.5 million in each of 2023 and 2024. Research and development costs werenot significant in any year presented.

Corporate expenses – Corporate expenses include environmental, legal and other costs attributable to formerly-owned business units.

Note 2 – Business, segment and geographic information:

We haveone operating segment. At December 31, 2024 we owned 87% of CompX. CompX manufactures and sells security products including locking mechanisms and other security products for sale to the postal, transportation, office and institutional furniture, cabinetry, tool storage, healthcare and other industries. CompX also manufactures and distributes wake enhancement systems, stainless steel exhaust systems, gauges, throttle controls, trim tabs and related hardware and accessories primarily for ski/wakeboard boats and performance boats.

Our chief operating decision maker (“CODM”) is our Vice Chairman of the Board. Our CODM is responsible for determining how to allocate resources and assessing performance. The CODM evaluates segment performance based on net income and segment profit (a non-GAAP measure), which we define as gross margin less selling, general and administrative expenses directly attributable to CompX. The CODM considers current-period segment profit compared to plan and prior-period on a monthly and/or quarterly basis for evaluating segment performance and making decisions about allocating capital and other resources. The accounting policies of the reportable operating segment are the same as those described in Note 1.

Differences between segment profit and the amounts included in net income are included in the table below. Asset information is not regularly provided to the CODM and therefore is not considered to be used by the CODM in making key operating decisions, allocating resources or assessing segment performance. Depreciation and amortization amounts included in the calculation of segment profit all relate to CompX and were$4.0 million in each of 2022 and 2023 and$3.7 million in 2024.

See the Consolidated Financial Statements for other financial information regarding the Company’s operating segment.

For geographic information, the point of origin (place of manufacture) for all net sales is the U.S., the point of destination for net sales is based on the location of the customer.

Note 3 – Accounts and other receivables, net:

Other receivables are discussed in Note 17.

Note 4 – Inventories, net:

Note 5 – Marketable securities:

The current marketable securities we held at December 31, 2023 consisted of investments in debt securities. The fair value of these current marketable securities was generally determined using Level 2 inputs because although these securities are generally traded, in many cases the market is not active and the year-end valuation is generally based on the last trade of the year, which may be several days prior to December 31.

Our noncurrent marketable securities consist of investments in the publicly-traded shares of our immediate parent company Valhi, Inc. Our shares of Valhi common stock are accounted for as available-for-sale securities, which are carried at fair value using quoted market prices in active markets and represent a Level 1 input within the fair value hierarchy.

At December 31, 2023 and 2024, we held approximately 1.2 million shares of our immediate parent company, Valhi. See Note 1. The per share quoted market price of Valhi common stock at December 31, 2023 and 2024 was $15.19 and $23.39, 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 – Investment in Kronos Worldwide, Inc.:

At December 31, 2023 and 2024, we owned approximately 35.2 million shares of Kronos common stock. The per share quoted market price of Kronos common stock at December 31, 2023 and 2024 was $9.94 and $9.75 per share, respectively, or an aggregate market value of $350.1 million and $343.4 million, respectively. The change in the carrying value of our investment in Kronos during the past three years is summarized below:

Selected financial information of Kronos is summarized below:

Effective July 16, 2024 (“Acquisition Date”), Kronos acquired the 50% joint venture interest in Louisiana Pigment Company, L.P. (“LPC”) previously held by Venator Investments, Ltd. (“Venator”). Prior to the acquisition, Kronos held a 50% joint venture interest in LPC and LPC was operated as a manufacturing joint venture between Kronos and Venator. Kronos acquired the 50% joint venture interest in LPC for consideration of $185 million less a working

capital adjustment. An additional earn-out payment of up to $15 million may be required if Kronos’ aggregate consolidated net income before interest expense, income taxes and depreciation and amortization expense, or EBITDA, during atwo-year period comprising calendar years 2025 and 2026 exceed certain thresholds as described below. Kronos accounted for the acquisition of the interest in LPC as a business combination and, as a result of obtaining full control, LPC became a wholly-owned subsidiary of Kronos. Obtaining control of LPC and its estimated additional 78,000 metric tons annually of TiO 2 production volume allows Kronos to better serve the North American TiO 2 marketplace. The acquisition was financed through a borrowing of $132.1 million under Kronos’ Global Revolver and the remainder paid with Kronos’ cash on hand. The potential earn-out payment of up to $15 million is based on Kronos’ aggregate consolidated EBITDA tiers for 2025 and 2026 of $650 million and $730 million, with $5 million of the earn-out payable if Kronos achieves $650 million in aggregate consolidated EBITDA, and a maximum of $15 million payable if aggregate EBITDA is $730 million or greater for the period. If Kronos achieves aggregated consolidated EBITDA between $650 million and $730 million, the payment of the additional $10 million is prorated between the two targets. The earn-out is payable at the earliest in April 2027. The estimated fair value of the earn-out at the Acquisition Date was $4.2 million and was determined using a weighted probability of potential outcomes based on estimated future EBITDA and volatility factors, among other variables and estimates. Kronos recognized a pre-tax gain of approximately $64.5 million in the third quarter of 2024, representing the difference between the $178.2 million estimated fair value of its existing ownership interest in LPC at the Acquisition Date and its aggregate $113.7 million carrying value at the Acquisition Date.

Note 7 – Goodwill:

All of our goodwill is related to our component products operations and was generated from CompX’s acquisitions of certain business units. There have beenno changes in the carrying amount of our goodwill during the past three years.

We assign goodwill based on the reporting unit (as that term is defined in ASC Topic 350-20-20Goodwill) which corresponds to CompX’s security products operations. We test for goodwill impairment at the reporting unit level. In accordance with ASC 350-20-35, we test for goodwill impairment during the third quarter of each year or when circumstances arise that indicate an impairment might be present.

In 2022, 2023 and 2024, our goodwill was tested for impairment only in the third quarter of each year in connection with our annual testing. No impairment was indicated as part of such annual review of goodwill. As permitted by GAAP, during 2022, 2023 and 2024 we used the qualitative assessment of ASC 350-20-35 for our annual impairment test and determined it was not necessary to perform the quantitative goodwill impairment test. Prior to 2022, all of the goodwill related to CompX’s marine components operations (which aggregated $10.1 million) was impaired, and all of the goodwill related to our wholly-owned subsidiary EWI Re, Inc., (“EWI”) which was formerly an insurance brokerage and risk management services company (which aggregated $6.4 million), was impaired. Our gross goodwill at December 31, 2024 was $43.7 million.

Note 8 – Other assets, net:

Note 9 – Accrued and other current liabilities:

Note 10 – Long-term debt:

In November 2016, we entered into a financing transaction with Valhi. Previously, and in contemplation of the financing transaction described herein, we formed NLKW Holding, LLC (“NLKW”) and capitalized it with 35.2 million shares of the common stock of Kronos held by us.

The financing transaction consisted of two steps. Under the first step, NLKW entered into a $50 million revolving credit facility (the “Valhi Credit Facility”) pursuant to which NLKW can borrow up to $50 million from Valhi (with such commitment amount subject to increase from time to time at Valhi’s sole discretion). Proceeds from any borrowings by NLKW under the Valhi Credit Facility would be available for one or more loans from NLKW to us in accordance with the terms of the second step of the financing transaction: a Back-to-Back Credit Facility, as described below. Outstanding borrowings under the Valhi Credit Facility bear interest at the prime rate plus 1.875% per annum, payable quarterly, with all amounts due on the maturity date. The maximum principal amount which may be outstanding from time-to-time under the Valhi Credit Facility is limited to 50% of the amount determined by multiplying the number of shares of Kronos common stock pledged by the most recent closing price of such security on the New York Stock Exchange. Borrowings under the Valhi Credit Facility are collateralized by the assets of NLKW (consisting primarily of the shares of Kronos common stock pledged) and 100% of the membership interest in NLKW held by us. The Valhi Credit Facility contains a number of covenants and restrictions which, among other things, restrict NLKW’s ability to incur additional debt, incur liens, and merge or consolidate with, or sell or transfer substantially all of NLKW’s assets to, another entity, and require NLKW to maintain a minimum specified level of consolidated net worth. Upon an event of default, Valhi will be entitled to terminate its commitment to make further loans to NLKW, to declare the outstanding loans (with interest) immediately due and payable, and, in the case of certain insolvency events with respect to NLKW or us, to exercise its rights with respect to the collateral. Such collateral rights include the right to purchase all of the shares of Kronos common stock pledged at a purchase price equal to the aggregate market value of such stock (with such market value determined by an independent third-party valuation provider), less amounts owing to Valhi under the Valhi Credit Facility, with up to 50% of such purchase price being payable by Valhi in the form of an unsecured promissory note bearing interest at the prime rate plus 2.75% per annum, payable quarterly, with all amounts due no later than five years from the date of purchase, and with the remainder of such purchase price payable in cash at the date of purchase.

Contemporaneously with the entering into the Valhi Credit Facility, NLKW entered into a $50 million revolving credit facility (the “Back-to-Back Credit Facility”) with us, pursuant to which we can borrow up to $50 million from NLKW (with such commitment amount subject to increase from time to time at NLKW’s sole discretion). Proceeds from any borrowings under the Back-to-Back Credit Facility would be available for our general corporate purposes, including providing resources to assist us in the resolution of certain claims and contingent liabilities which may be asserted against us. Outstanding borrowings under the Back-to-Back Credit Facility bear interest at the same rate and are payable on the same maturity date as are borrowings by NLKW under the Valhi Credit Facility. Borrowings under the Back-to-Back Credit Facility are on an unsecured basis; however, as a condition thereto, we pledged to Valhi as collateral for the Valhi Credit Facility our 100% membership interest in NLKW. Any outstanding borrowings and interest on such borrowings under the Back-to-Back Credit Facility are eliminated in the preparation of the Consolidated Financial Statements.

In November 2022, NLKW and Valhi entered into a first amendment to the Valhi Credit Facility to extend the latest maturity date (and consequently the latest borrowing date) under the Valhi Credit Facility from December 31, 2023 to December 31, 2030; and NLKW and NL entered into a first amendment to the Back-to-Back Credit Facility to extend the latest

maturity date (and consequently the latest borrowing date) under the Back-to-Back Credit Facility from December 31, 2023 to December 31, 2030. The related collateral arrangements remained unchanged by these amendments.

We had outstanding borrowings under the Valhi Credit Facility of $.5 million as of December 31, 2023 and 2024. The interest rate as of December 31, 2024 was 9.4% and the average interest rate for the year then ended was 10.2%. See Note 16. NLKW is in compliance with all of the covenants contained in the Valhi Credit Facility at December 31, 2024.

Note 11 – Employee benefit plans:

Defined contribution plans – We maintain various defined contribution pension plans. Company contributions are based on matching or other formulas. Defined contribution plan expense approximated $3.9 million in each of 2022 and 2023 and $3.5 million in 2024.

Defined benefit pension plans – We maintain a defined benefit pension plan in the U.S. As a result of the spin-off of Kronos in 2003, Kronos participates in our pension plan. Using participant data, we account for our portion of the combined pension plan as if it were a separate pension plan from the portion in which Kronos participates. As a result of the LPC acquisition in July 2024 (see Note 6), Kronos acquired the LPC defined benefit pension plan, which was overfunded on the Acquisition Date. Effective December 31, 2024, the LPC defined benefit pension plan was merged into our combined U.S. pension plan. See Note 16. Because we account for our portion of the combined pension plan separately, the plan merger did not impact our Consolidated Financial Statements. The benefits under our defined benefit pension plan are based upon years of service and employee compensation. The plan is closed to new participants, and no additional benefits accrue to existing plan participants. Our funding policy is to contribute annually the minimum amount required under ERISA regulations plus additional amounts as we deem appropriate.

We previously maintained a defined benefit pension plan in the U.K. related to a former disposed U.K. business unit. In accordance with applicable U.K. pension regulations, we entered into an agreement in March 2021 for the bulk annuity purchase, or “buy-in”, with a specialist insurer of defined benefit pension plans. Following the buy-in, individual policies replaced the bulk annuity policy in a “buy-out” which was completed as of May 1, 2023. The buy-out was completed with existing plan funds. At the completion of the buy-out, the assets and liabilities of the U.K. pension plan were removed from our Consolidated Financial Statements and a non-cash pension plan termination loss of $4.9 million was recognized in the second quarter of 2023.

We do not expect to make any contributions to our defined benefit pension plan during 2025. Benefit payments to all plan participants out of plan assets are expected to be the equivalent of:

The funded status of our defined benefit pension plans is presented in the table below.

The amounts shown in the table above for actuarial (gains) losses at December 31, 2023 and 2024 have not been recognized as components of our periodic defined benefit pension cost as of those dates. These amounts will be recognized as components of our periodic defined benefit cost in future years. These amounts, net of deferred income taxes, are recognized in our accumulated other comprehensive loss at December 31, 2023 and 2024.

Our defined benefit pension plans increased from a total net underfunded status of $1.6 million at December 31, 2023 to a total net overfunded status of $.2 million at December 31, 2024 due to the change in our PBO exceeding the change in our plan assets during 2024. The decrease in our PBO in 2024 was primarily attributable to higher actuarial gains due primarily to the increase in the discount rate.

The table below details the changes in other comprehensive income (loss) during 2022, 2023 and 2024.

The components of our net periodic defined benefit pension cost are presented in the table below. The amounts shown below for recognized actuarial losses in 2022, 2023 and 2024, net of deferred income taxes, were recognized as a component of our accumulated other comprehensive loss at December 31, 2021, 2022 and 2023, respectively.

Certain information concerning our defined benefit pension plans (including information concerning certain plans for which ABO exceeds the fair value of plan assets as of the indicated date) is presented in the table below. As discussed above, our U.K. plan was terminated in the second quarter of 2023.

The weighted-average discount rate assumptions used in determining the actuarial present value of our benefit obligations as of December 31, 2023 and 2024 are 5.0% and 5.5%, respectively. Such weighted-average rates were determined using the projected benefit obligations at each date. Since our plans are closed to new participants and no new additional benefits accrue to existing plan participants, assumptions regarding future compensation levels are not applicable. Consequently, the accumulated benefit obligations for all of our defined benefit pension plans were equal to the projected benefit obligations at December 31, 2023 and 2024.

The weighted-average rate assumptions used in determining the net periodic pension cost for 2022, 2023 and 2024 are presented in the table below. Such weighted-average discount rates were determined using the projected benefit obligations as of the beginning of each year and the weighted-average long-term return on plan assets was determined using the fair value of plan assets as of the beginning of each year.

Variances from actuarially assumed rates will result in increases or decreases in accumulated pension obligations, pension expense and funding requirements in future periods.

In determining the expected long-term rate of return on our U.S. and our previously maintained non-U.S. plan asset assumptions, we consider the long-term asset mix (e.g., equity vs. fixed income) for the assets for each of our plans and the expected long-term rates of return for such asset components. In addition, we receive third-party advice about appropriate long-term rates of return. In the U.S. we currently have a plan asset target allocation of 17% to equity securities,80% to fixed income securities, and the remainder is allocated to other strategies. The expected long-term rate of return for such investments is approximately 7% and 5%, respectively (before plan administrative expenses). Approximately 99% of our U.S. plan assets are invested in funds that are valued at net asset value (“NAV”) and, in accordance with ASC 820-10, not subject to classification in the fair value hierarchy.

We regularly review our actual asset allocation for each plan and will periodically rebalance the investments in each plan to more accurately reflect the targeted allocation and/or maximize the overall long-term return when considered appropriate.

The composition of our pension plan assets by fair value level at December 31, 2023 and 2024 is shown in the tables below.

Note 12 – Other noncurrent liabilities:

Our reserve for uncertain tax positions is discussed in Note 14.

Note 13 – Revenue recognition:

The following table disaggregates our net sales by reporting unit, which are the categories that depict how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors (as required by ASC 606).

Note 14 – Income taxes:

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

In accordance with GAAP, we recognize deferred income taxes on our undistributed equity in earnings (losses) of Kronos. Because we and Kronos are part of the same U.S. federal income tax group, any dividends we receive from Kronos are nontaxable to us. Accordingly, we do not recognize and we are not required to pay income taxes on dividends from Kronos. We received aggregate dividends from Kronos of $26.8 million in each of 2022 and 2023, and $16.9 million 2024. See Note 6.

The components of the net deferred tax liability at December 31, 2023 and 2024 are summarized in the following table.

At December 31, 2024, we have a deferred tax asset relating to our NOL carryforwards for federal income tax purposes of $2.5 million all of which havean indefinite carryforward period subject to an 80% annual usage limitation. Our deferred tax asset for such NOL carryforward is shown net of a portion of our uncertain tax positions as discussed below.

At December 31, 2022, 2023, and 2024, the gross amount of our uncertain tax positions (exclusive of the effect of interest and penalties) was $7.3 million, and this amount has not changed during the past three years. Previously, we made certain pro-rata distributions to our stockholders in the form of Kronos common stock and we recognized a taxable gain related to such distributions. Our uncertain tax positions are attributable to such prior period distribution of Kronos common stock. As discussed in Note 1, we are part of the Contran Tax Group and we have not paid this liability because Contran has not paid the liability to the applicable tax authority. This liability would be payable by Contran to the applicable tax authority only if the previously distributed shares of Kronos common stock were to be sold or otherwise disposed outside of the Contran Tax Group. At December 31, 2024, $2.5 million of our uncertain tax position is classified as a component of our noncurrent deferred tax liability. If our uncertain tax position at December 31, 2024 was recognized, a benefit of $7.3 million would affect our effective income tax rate. We currently estimate that our unrecognized tax benefits will not change materially during the next twelve months.

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.

We and Contran file income tax returns in U.S. federal and various state and local jurisdictions. Our U.S. income tax returns prior to 2021 are generally considered closed to examination by applicable tax authorities.

Income tax matters related to Kronos

Kronos periodically reviews its deferred tax assets (“DTA”) to determine if a valuation allowance is required. At December 31, 2024, Kronos has German corporate and trade net operating loss (“NOL”) carryforwards of $447.3 million (DTA of $70.8 million) and $40.1 million (DTA of $4.4 million), respectively; Belgian corporate NOL carryforwards of $72.0 million (DTA of $18.0 million) and Canadian corporate and provincial NOL carryforwards of $28.9 million (DTA of $4.3 million) and $31.1 million (DTA of $3.6 million), respectively.

Prior to December 31, 2024, and using all available evidence, Kronos had concluded thatno deferred income tax asset valuation allowance is required to be recognized with respect to such carryforwards, principally because (i) such carryforwards have lengthy carryforward periods (the German and Belgian carryforwards may be carried forward indefinitely and the Canadian carryforwards may be carried forward 20 years), (ii) Kronos has utilized a portion of such carryforwards during the most recent three-year period and (iii) Kronos currently expects to utilize the remainder of such carryforwards over the long term. With regards to Kronos’ Belgian DTA, given its operating results during the fourth quarter of 2024 and its current expectations for 2025 in that jurisdiction, Kronos does not have sufficient positive evidence to overcome the significant negative evidence of having twelve quarters of cumulative losses. Accordingly, at December 31, 2024, Kronos concluded that it was required to recognize a non-cash deferred income tax asset valuation allowance of $8.2 million under the more-likely-than-not recognition criteria with respect to its Belgian DTA. At December 31, 2024, Kronos continues to concludeno valuation allowance is required to be recognized for its German and Canadian DTAs although prior to the complete utilization of such carryforwards, if Kronos were to generate additional losses in its German or Canadian operations for an extended period of time, or if applicable laws were to change such that the carryforward periods were more limited, it is possible that it might conclude the benefit of such carryforwards would no longer meet the more-likely-than-not recognition criteria, at which point Kronos would be required to recognize a valuation allowance against some or all of the then-remaining tax benefit associated with the carryforwards.

The 2017 Tax Act limited Kronos’ business interest expense to the sum of its business interest income and 30% of its adjusted taxable income as defined in the Tax Act. Any business interest expense disallowed as a deduction as a result of the limitation may be carried forward indefinitely. At December 31, 2023 and December 31, 2024, Kronos has

recorded deferred tax assets of$3.5 million and$13.3 million, respectively, for the carryforwards associated with the nondeductible portion of its interest expense and has concluded it is required to recognize a valuation allowance for such deferred tax asset under the more-likely-than-not recognition criteria. During 2024, Kronos recognized a non-cash deferred income tax expense of$5.7 million with respect to the valuation allowance recorded on a portion of its additional interest expense carryforwards not benefitted by future reversals of existing deferred tax liabilities.

Prior to the enactment of the 2017 Tax Act, the undistributed earnings of Kronos’ European subsidiaries were deemed to be permanently reinvested (Kronos had not made a similar determination with respect to the undistributed earnings of its Canadian subsidiary). Pursuant to the one-time repatriation tax (Transition Tax) provisions of the 2017 Tax Act which imposed a one-time repatriation tax on post-1986 undistributed earnings, Kronos recognized current income tax expense of $74.5 million and elected to pay such tax in annual installments over aneight-year period beginning in 2018. At December 31, 2024 the balance of its unpaid Transition Tax is $18.6 million, with the remaining payment due in 2025.

On December 10, 2024, the Department of the Treasury and the Internal Revenue Service released final currency regulations under §987 and related rules (the “2024 Final Regulations”). The 2024 Final Regulations generally apply to tax years beginning after December 31, 2024, and include transition rules that require Kronos to compute a pretransition gain or loss for currency translation related to the operations, assets and liabilities of its non-U.S. qualified business units. Pursuant to the 2024 Final Regulations, Kronos has calculated a pretransition gain of $77.1 million and, accordingly, its income tax expense in 2024 includes a non-cash deferred income tax expense of $16.5 million recognized in the fourth quarter.

Tax authorities are examining certain of Kronos’ U.S. and non-U.S. tax returns and may propose tax deficiencies, including penalties and interest. Because of the inherent uncertainties involved in settlement initiatives and court and tax proceedings, Kronos cannot guarantee that these tax matters, if any, will be resolved in Kronos’ favor, and therefore its potential exposure, if any, is also uncertain. Kronos believes it has adequate accruals for additional taxes and related interest expense which could ultimately result from tax examinations. Kronos believes the ultimate disposition of tax examinations should not have a material adverse effect on its consolidated financial position, results of operations or liquidity.

Note 15- Stockholders’ equity:

Long-term incentive compensation plan – Prior to 2022, our board of directors adopted a plan that provided for the award of stock to our board of directors, and up to a maximum of 200,000 shares could be awarded. We awarded 15,000 shares in 2022 and 17,750 shares in 2023 under this plan. In February 2023, our board of directors voted to replace the existing director stock plan with a new plan that would provide for the award of stock to non-employee members of our board of directors, and up to a maximum of 200,000 shares could be awarded. The new plan was approved at our May 2023 shareholder meeting, and the prior director stock plan terminated effective June 30, 2023. We awarded 14,250 shares in 2024 under the new plan. At December 31, 2024,185,750 shares were available for future award under this new plan.

Long-term incentive compensation plans of subsidiaries and affiliates – CompX and Kronos each have a share-based incentive compensation plan pursuant to which an aggregate of up to 200,000 shares of their common stock can be awarded to members of their board of directors. At December 31, 2024, Kronos had 87,800 shares available for award and CompX had 119,650 shares available for award.

Dividends – Our board of directors approved and we paid quarterly dividends per share to stockholders of $.07 in each of 2022 and 2023 aggregating $13.7 million in each year and $.08 in 2024 aggregating $15.6 million. In addition, our board of directors declared special dividends on our common stock which totaled $17.1 million ($.35 per share) that was paid on August 31, 2022 and $21.0 million ($.43 per share) that was paid on August 29, 2024. The declaration and payment of future dividends, and the amount thereof, is discretionary and is dependent upon our financial condition, cash requirements, contractual obligations and restrictions and other factors deemed relevant by our board of directors. The amount and timing of past dividends is not necessarily indicative of the amount or timing of any future dividends which might be paid. There are currently no contractual restrictions on the amount of dividends which we may pay.

Accumulated other comprehensive loss – Changes in accumulated other comprehensive loss attributable to NL stockholders, including amounts resulting from our investment in Kronos Worldwide (see Note 6), are presented in the table below.

See Note 5 for further discussion on our marketable securities and Note 11 for amounts related to our defined benefit pension plans.

*Other –*During 2022, we purchased 2,000 shares of our common stock from Kronos for a nominal amount in a private transaction that was approved in advance by our independent directors. We cancelled these treasury shares and allocated their cost to common stock at par value and additional paid-in capital.

During 2022, CompX acquired 78,900 shares of its Class A common stock for an aggregate amount of approximately $1.7 million under prior repurchase authorizations. Of these shares,70,000 shares were purchased in a market transaction, and 8,900 shares were purchased from two of its affiliates in two separate private transactions that

were also approved in advance by CompX’s independent directors. At December 31, 2024,523,647 shares were available for purchase under CompX’s prior repurchase authorizations.

Note 16 – Related party transactions:

We may be deemed to be controlled by Ms. Simmons and the Family Trust. See Note 1. Corporations that may be deemed to be controlled by or affiliated with such individuals sometimes engage in (a) intercorporate transactions such as guarantees, management and expense sharing arrangements, shared fee arrangements, joint ventures, partnerships, loans, options, advances of funds on open account, and sales, leases and exchanges of assets, including securities issued by both related and unrelated parties and (b) common investment and acquisition strategies, business combinations, reorganizations, recapitalizations, securities repurchases, and purchases and sales (and other acquisitions and dispositions) of subsidiaries, divisions or other business units, which transactions have involved both related and unrelated parties and have included transactions which resulted in the acquisition by one related party of a publicly-held noncontrolling interest in another related party. While no transactions of the type described above are planned or proposed with respect to us other than as set forth in these financial statements, we continuously consider, review and evaluate, and understand that Contran and related entities consider, review and evaluate such transactions. Depending upon the business, tax and other objectives then relevant, it is possible that we might be a party to one or more such transactions in the future.

Current receivables and payables to affiliates are summarized in the table below:

From time to time, we may have loans and advances outstanding between us and various related parties, pursuant to term and demand notes. We generally enter into these loans and advances for cash management purposes. When we loan funds to related parties, we are generally able to earn a higher rate of return on the loan than the lender would earn if the funds were invested in other instruments and when we borrow from related parties, we are generally able to pay a lower rate of interest than we would pay if we borrowed from unrelated parties. While certain of such loans may be of a lesser credit quality than cash equivalent instruments otherwise available to us, we believe that we have evaluated the credit risks involved and reflected those credit risks in the terms of the applicable loans. NLKW had borrowings outstanding of $.5 million as of December 31, 2023 and 2024 under the Valhi Credit Facility, and we incurred a nominal amount of interest expense under such credit facility for the years ended December 31, 2022, 2023 and 2024. See Note 10. In addition, prior to 2022, CompX entered into an unsecured revolving demand promissory note with Valhi under which, as amended, CompX has agreed to loan Valhi up to $25 million. CompX’s loan to Valhi, as amended, bears interest at prime plus 1.00%, payable quarterly, with all principal due on demand, but in any event no earlier than December 31, 2026. Loans made to Valhi at any time are at CompX’s discretion. At December 31, 2023 and 2024, the outstanding principal balance receivable from Valhi under the promissory note was $10.6 million and $9.3 million, respectively. Interest income (including unused commitment fees) on CompX’s loan to Valhi was $1.0 million in 2022, $1.2 million in 2023 and $1.0 million in 2024. In February 2024, Kronos entered into a $53.7 million subordinated, unsecured term loan with Contran.

Under the terms of various intercorporate services agreements (ISAs) we enter into with Contran, employees of Contran will provide certain management, tax planning, financial and administrative services to the Company on a fee

basis. Such fees are based on the compensation of individual Contran employees providing services for us and/or estimates of time devoted to our affairs by such persons. Because of the number of companies affiliated with Contran, we believe we benefit from cost savings and economies of scale gained by not having certain management, financial and administrative staffs duplicated at each entity, thus allowing certain Contran employees to provide services to multiple companies but only be compensated by Contran. We, CompX and Kronos negotiate fees annually and agreements renew quarterly. The net ISA fees charged to us by Contran, (including amounts attributable to Kronos for all periods) aggregated approximately $33.5 million in 2022, $30.8 million in 2023 and $32.2 million in 2024.

Contran and certain of its subsidiaries and affiliates, including us, purchase certain of their insurance policies and risk management services as a group, with the costs of the jointly-owned policies and services being apportioned among the participating companies. Tall Pines Insurance Company, a subsidiary of Valhi, underwrites certain insurance policies for Contran and certain of its subsidiaries and affiliates, including us. Tall Pines purchases reinsurance from highly rated (as determined by A.M. Best or other internationally recognized ratings agency) third-party insurance carriers for substantially all of the risks it underwrites. Consistent with insurance industry practices, Tall Pines receives commissions from the reinsurance underwriters and/or assesses fees for certain of the policies that it underwrites. During 2022, 2023 and 2024 we paid $24.3 million, $28.4 million and $29.1 million, respectively, under the group insurance program (including amounts attributable to Kronos and LPC for all periods) which amounts principally represent insurance premiums, including $18.2 million, $20.7 million and $21.4 million in 2022, 2023 and 2024, respectively, for policies written by Tall Pines. Amounts paid under the group insurance program also include payments to insurers or reinsurers for the reimbursement of claims within our applicable deductible or retention ranges that such insurers and reinsurers paid to third parties on our behalf, as well as amounts for claims and risk management services and various other third-party fees and expenses incurred by the program. We expect these relationships will continue in 2025.

With respect to certain of such jointly-owned policies, it is possible that unusually large losses incurred by one or more insured party during a given policy period could leave the other participating companies without adequate coverage under that policy for the balance of the policy period. As a result, and in the event that the available coverage under a particular policy would become exhausted by one or more claims, Contran and certain of its subsidiaries and affiliates, including us, have entered into a loss sharing agreement under which any uninsured loss arising because the available coverage had been exhausted by one or more claims will be shared ratably by those entities that had submitted claims under the relevant policy. We believe the benefits in the form of reduced premiums and broader coverage associated with the group coverage for such policies justifies the risk associated with the potential for any uninsured loss.

Contran and certain of its subsidiaries, including us, participate in a combined information technology data services program that Contran provides for primary data processing and failover. The program apportions its costs among the participating companies. The aggregate amount Kronos paid to Contran for such services was $.3 million in 2022 and $.4 million in each of 2023 and 2024. Under the terms of a sublease agreement between Contran and Kronos, Kronos leases certain office space from Contran. Kronos paid Contran $.5 million in 2022, $.6 million in 2023 and $.7 million in 2024 for such rent and related ancillary services. We expect that these relationships with Contran will continue in 2025.

We are a party to a tax sharing agreement with Contran and Valhi providing for the allocation of tax liabilities and tax payments as described in Note 1. Under applicable law, we, as well as every other member of the Contran Tax Group, are each jointly and severally liable for the aggregate federal income tax liability of Contran and the other companies included in the Contran Tax Group for all periods in which we are included in the Contran Tax Group. Valhi has agreed, however, to indemnify us for any liability for income taxes of the Contran Tax Group in excess of our tax liability computed in accordance with the tax sharing agreement.

Effective December 31, 2024, the LPC defined benefit pension plan was merged into our U.S. combined defined benefit pension plan. Under the terms of the merger, each of us and Kronos are contractually obligated to bear our respective share of the merged plan costs, including any funding obligations, and we and Kronos each continue to account for our respective portions of the merged plan as if it were a separate employee benefit plan. If the merged plan were to be terminated in the future, Kronos would be entitled to all funding surplus attributable to its participants in the plan. In February 2025, our board of directors approved the termination of the merged plan, with an effective date of June 30,

2025. We anticipate that the completion of the merged plan termination will occur in the second half of 2026, following the receipt of all necessary regulatory approvals. Termination of the merged plan would permanently remove all plan assets, liabilities and accumulated other comprehensive income (loss) from our financial statements.

Note 17 – Commitments and contingencies:

Lead pigment litigation

Our former operations included the manufacture of lead pigments for use in paint and lead-based paint. We, other former manufacturers of lead pigments for use in paint and lead-based paint (together, the “former pigment manufacturers”), and the Lead Industries Association (LIA), which discontinued business operations in 2002, have previously been named as defendants in various legal proceedings seeking damages for personal injury, property damage and governmental expenditures allegedly caused by the use of lead-based paints. Certain of these actions were filed by or on behalf of states, counties, cities or their public housing authorities and school districts, and certain others were asserted as class actions. We currently have no pending lead paint class action cases or pending lead paint cases brought by housing authorities, school districts or other government entities.

In the matter titledCounty of Santa Clara v. Atlantic Richfield Company, et al. (Superior Court of the State of California, County of Santa Clara, Case No. 1-00-CV-788657)on July 24, 2019, an order approving a global settlement agreement entered into among all of the plaintiffs and the three defendants remaining in the case (the Sherwin Williams Company, ConAgra Grocery Products and us) was entered by the court and the case was dismissed with prejudice. The global settlement agreement provides that an aggregate $305 million will be paid collectively by thethree co-defendants in full satisfaction of all claims resulting in a dismissal of the case with prejudice and the resolution of (i) all pending and future claims by the plaintiffs in the case, and (ii) all potential claims for contribution or indemnity between us and our co-defendants in respect to the case. In the agreement, we expressly deny any and all liability and the dismissal of the case with prejudice was entered by the court without a final judgment of liability entered against us. The settlement agreement fully concludes this matter.

Under the terms of the global settlement agreement, each defendant must pay an aggregate $101.7 million to the plaintiffs as follows: $25.0 million within sixty days of the court’s approval of the settlement and dismissal of the case, and the remaining $76.7 million insix annual installments beginning on the first anniversary of the initial payment ($12.0 million for the first five installments and $16.7 million for the sixth installment). Our sixth installment due in September 2025 will be made with funds already on deposit at the court, which is included in current restricted cash on our Consolidated Balance Sheets, that are committed to the settlement, including all accrued interest at the date of payment, with any remaining balance to be paid by us (and any amounts on deposit in excess of the final payment would be returned to us). Pursuant to the settlement agreement, we had placed an additional $9.0 million into an escrow account which was previously included in noncurrent restricted cash on our Consolidated Balance Sheets. Following our fifth $12.0 million installment made in September 2024, these funds became available for use and were reclassified as cash equivalents on our Consolidated Balance Sheet.

For financial reporting purposes, using a discount rate of 1.9% per annum, we discounted the aggregate $101.7 million settlement to the estimated net present value of $96.3 million. We made the initial $25.0 million payment in September 2019 and five annual installment payments of $12.0 million beginning in September 2020 and each September thereafter through 2024. We recognized an aggregate accretion expense of $.9 million, $.7 million, and $.5 million in 2022, 2023, and 2024 respectively.

New cases may continue to be filed against us. We do not know if we will incur liability in the future in respect of any of the pending or possible litigation in view of the inherent uncertainties involved in court and jury rulings. In the future, if new information regarding such matters becomes available to us (such as a final, non-appealable adverse verdict against us or otherwise ultimately being found liable with respect to such matters), at that time we would consider such information in evaluating any remaining cases then-pending against us as to whether it might then have become probable we have incurred liability with respect to these matters, and whether such liability, if any, could have become reasonably

estimable. The resolution of any of these cases could result in the recognition of a loss contingency accrual that could have a material adverse impact on our net income for the interim or annual period during which such liability is recognized and a material adverse impact on our consolidated financial condition and liquidity.

Environmental matters and litigation

Our operations are governed by various environmental laws and regulations. Certain of our businesses are and have been engaged in the handling, manufacture or use of substances or compounds that may be considered toxic or hazardous within the meaning of applicable environmental laws and regulations. As with other companies engaged in similar businesses, certain of our past and current operations and products have the potential to cause environmental or other damage. We have implemented and continue to implement various policies and programs in an effort to minimize these risks. Our policy is to maintain compliance with applicable environmental laws and regulations at all of our plants and to strive to improve environmental performance. From time to time, we may be subject to environmental regulatory enforcement under U.S. statutes, the resolution of which typically involves the establishment of compliance programs. It is possible that future developments, such as stricter requirements of environmental laws and enforcement policies, could adversely affect our production, handling, use, storage, transportation, sale or disposal of such substances. We believe all of our facilities are in substantial compliance with applicable environmental laws.

Certain properties and facilities used in our former operations, including divested primary and secondary lead smelters and former mining locations, are the subject of civil litigation, administrative proceedings or investigations arising under federal and state environmental laws and common law. Additionally, in connection with past operating practices, we are currently involved as a defendant, potentially responsible party (PRP) or both, pursuant to the Comprehensive Environmental Response, Compensation and Liability Act, as amended by the Superfund Amendments and Reauthorization Act (CERCLA), and similar state laws in various governmental and private actions associated with waste disposal sites, mining locations, and facilities that we or our predecessors, our subsidiaries or their predecessors currently or previously owned, operated or used, certain of which are on the United States Environmental Protection Agency’s (EPA) Superfund National Priorities List or similar state lists. These proceedings seek cleanup costs, damages for personal injury or property damage and/or damages for injury to natural resources. Certain of these proceedings involve claims for substantial amounts. Although we may be jointly and severally liable for these costs, in most cases we are only one of a number of PRPs who may also be jointly and severally liable, and among whom costs may be shared or allocated. In addition, we are occasionally named as a party in a number of personal injury lawsuits filed in various jurisdictions alleging claims related to environmental conditions alleged to have resulted from our operations.

Obligations associated with environmental remediation and related matters are difficult to assess and estimate for numerous reasons including the:

In addition, the imposition of more stringent standards or requirements under environmental laws or regulations, new developments or changes regarding site cleanup costs or the allocation of costs among PRPs, solvency of other PRPs, the results of future testing and analysis undertaken with respect to certain sites or a determination that we are potentially responsible for the release of hazardous substances at other sites, could cause our expenditures to exceed our current estimates. Actual costs could exceed accrued amounts or the upper end of the range for sites for which estimates have been made, and costs may be incurred for sites where no estimates presently can be made. Further, additional environmental and related matters may arise in the future. If we were to incur any future liability, this could have a material adverse effect on our Consolidated Financial Statements, results of operations and liquidity.

We record liabilities related to environmental remediation and related matters (including costs associated with damages for personal injury or property damage and/or damages for injury to natural resources) when estimated future expenditures are probable and reasonably estimable. We adjust such accruals as further information becomes available to us or as circumstances change. Unless the amounts and timing of such estimated future expenditures are fixed and reasonably determinable, we generally do not discount estimated future expenditures to their present value due to the uncertainty of the timing of the payout. We recognize recoveries of costs from other parties, if any, as assets when their receipt is deemed probable.

We do not know and cannot estimate the exact time frame over which we will make payments for our accrued environmental and related costs. The timing of payments depends upon a number of factors, including but not limited to the timing of the actual remediation process; which in turn depends on factors outside of our control. At each balance sheet date, we estimate the amount of our accrued environmental and related costs which we expect to pay within the next twelve months, and we classify this estimate as a current liability. We classify the remaining accrued environmental costs as a noncurrent liability.

The table below presents a summary of the activity in our accrued environmental costs during the past three years. The amount charged to expense is included in corporate expense on our Consolidated Statements of Operations.

On a quarterly basis, we evaluate the potential range of our liability for environmental remediation and related costs at sites where we have been named as a PRP or defendant, including sites for which our wholly-owned environmental management subsidiary, NL Environmental Management Services, Inc. (EMS), has contractually assumed our obligations. At December 31, 2024, we had accrued approximately $69 million related to approximately 30 sites associated with remediation and related matters we believe are at the present time and/or in their current phase reasonably estimable. Excluding the $56.1 million environmental remediation settlement payment made in the first quarter of 2025 (as discussed below), the upper end of the range of reasonably possible costs to us for remediation and related matters for which we believe it is possible to estimate costs is approximately $38 million, including amounts currently accrued. These accruals have not been discounted to present value.

On February 10, 2025, the United States District Court for the District of New Jersey entered an order approving a consent decree relating to the Raritan Bay Slag Superfund Site (“RBS Site”) in Middlesex County, New Jersey. The consent decree requires the United States Army Corps of Engineers (and other federal agencies), the State of New Jersey, the Township of Old Bridge, NL, and twenty-two other private companies to pay a total of $151.1 million, plus interest, to resolve all federal and state law claims for past and future response costs under CERCLA and the New Jersey Spill Act, including natural resource damages, contribution, and indemnification, relating to the RBS Site. The consent decree is a global settlement of all such claims relating to the RBS Site and resolves a lawsuit captionedUnited States of America, et al. v. NL Industries, Inc., et al. (United States District Court for the District of New Jersey, Civil Action No. 3:24-cv-08946) as well as all claims asserted by NL and the other settling parties in NL’s previously filed contribution lawsuit,*NL Industries, Inc. v. Old Bridge Township, et al.,*discussed above.

Under the terms of the consent decree, in the first quarter of 2025 we paid $56.1 million, plus $.5 million interest, toward the global settlement and received approximately $9.6 million from the other private companies participating in the settlement. We recognized aggregate income of approximately $31.4 million in 2024 related to the adjustment of our environmental accrual related to this matter and the recording of a $9.6 million receivable for the funds received in the first quarter of 2025 from the other private companies participating in the settlement. See Note 3.

We believe it is not reasonably possible to estimate the range of costs for certain sites. At December 31, 2024, there were approximately five sites for which we are not currently able to reasonably estimate a range of costs. For these sites, generally the investigation is in the early stages, and we are unable to determine whether or not we actually had any association with the site, the nature of our responsibility, if any, for the contamination at the site, if any, and the extent of contamination at and cost to remediate the site. The timing and availability of information on these sites is dependent on events outside of our control, such as when the party alleging liability provides information to us. At certain of these previously inactive sites, we have received general and special notices of liability from the EPA and/or state agencies alleging that we, sometimes with other PRPs, are liable for past and future costs of remediating environmental contamination allegedly caused by former operations. These notifications may assert that we, along with any other alleged PRPs, are liable for past and/or future clean-up costs. As further information becomes available to us for any of these sites which would allow us to estimate a range of costs, we would at that time adjust our accruals. Any such adjustment could result in the recognition of an accrual that would have a material effect on our Consolidated Financial Statements, results of operations and liquidity.

Insurance coverage claims

We are involved in certain legal proceedings with a number of our former insurance carriers regarding the nature and extent of the carriers’ obligations to us under insurance policies with respect to certain lead pigment and asbestos lawsuits. The issue of whether insurance coverage for defense costs or indemnity or both will be found to exist for our lead pigment and asbestos litigation depends upon a variety of factors and we cannot assure you that such insurance coverage will be available.

We have agreements with certain of our former insurance carriers pursuant to which the carriers reimburse us for a portion of our future lead pigment litigation defense costs, and one such carrier reimburses us for a portion of our future asbestos litigation defense costs. We are not able to determine how much we will ultimately recover from these carriers for defense costs incurred by us because of certain issues that arise regarding which defense costs qualify for reimbursement. While we continue to seek additional insurance recoveries, we do not know if we will be successful in obtaining reimbursement for either defense costs or indemnity. Accordingly, we recognize insurance recoveries in income only when receipt of the recovery is probable and we are able to reasonably estimate the amount of the recovery. In this regard we received $.5 million and $1.4 million in insurance recoveries in 2023 and 2024, respectively. Recoveries in 2022 were nominal.

Other litigation

In addition to the litigation described above, we and our affiliates are also involved in various other environmental, contractual, product liability, patent (or intellectual property), employment and other claims and disputes incidental to present and former businesses. In certain cases, we have insurance coverage for these items, although we do not expect additional material insurance coverage for environmental matters. We currently believe the disposition of all of these various other claims and disputes (including asbestos-related claims), individually and in the aggregate, should not have a material adverse effect on our consolidated financial position, results of operations or liquidity beyond the accruals already provided.

Concentrations of credit risk

Component products are sold primarily in North America to original equipment manufacturers. The ten largest customers related to our Component Products operations accounted for approximately 52% of total sales in each of 2022 and 2023 and 47% in 2024. One customer of CompX’s Security Products business accounted for 14% of total sales in 2022,24% in 2023 (of which 11% related to a pilot project) and 21% in 2024. One customer of CompX’s Marine Components business accounted for 12% of consolidated sales in 2022.

Note 18 – 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 as of December 31, 2023 and 2024:

Due to their near-term maturities, the carrying amounts of accounts receivable and accounts payable are considered equivalent to fair value.

Note 19 –Recent accounting pronouncements:

Adopted

In November 2023, the Financial Accounting Standards Board (“FASB”) issued ASU 2023-07, Segment Reporting (Topic 280):Improvements to Reportable Segment Disclosures. The ASU requires public companies to disclose significant segment expenses and other segment items on an annual and interim basis. The ASU also mandates public companies to provide all segment disclosures currently required annually in interim periods. Public companies are also required to disclose the title and position of the chief operating decision maker (“CODM”) and explain how the CODM uses the reported measure of segment profit or loss in assessing segment performance and allocation resources. See Note 2.

Pending Adoption

In December 2023, the FASB issued ASU 2023-09, Income Taxes (“Topic 740”):Improvements to Income Tax Disclosures. The ASU requires additional annual disclosure and disaggregation for the rate reconciliation, income taxes paid and income tax expense by federal, state and non-U.S. tax jurisdictions. In addition, the standard increases the disclosure requirements for items included in the rate reconciliation that meet a quantitative threshold. The ASU is

effective for us beginning with our 2025 Annual Report. The ASU may be applied prospectively; however, entities have the option to apply it retrospectively. We are in the process of evaluating the additional disclosure requirements.

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.