UNITED STATES LIME & MINERALS INC

(1)Summaryof Significant Accounting Policies

(a) Organization and Presentation

United States Lime& Minerals, Inc. (the “Company”) is a manufacturer of lime and limestone products, supplying primarily the construction (including highway, road, and building contractors), industrial (including paper and glass manufacturers), environmental (including municipal sanitation and water treatment facilities and flue gas treatment processes), metals (including steel producers), roof shingle manufacturers, agriculture (including poultry producers), and oil and gas services industries. The Company is headquartered in Dallas, Texas and operates lime and limestone plants and distribution facilities in Arkansas, Colorado, Louisiana, Missouri, Oklahoma, and Texas through its wholly owned subsidiaries, Arkansas Lime Company, ART Quarry TRS LLC (DBA Carthage Crushed Limestone), Colorado Lime Company, Mill Creek Dolomite, LLC, Texas Lime Company, U.S. Lime Company, U.S. Lime Company-Shreveport, U.S. Lime Company-St. Clair, and U.S. Lime Company-Transportation. In addition, the Company, through its wholly owned subsidiary, U.S. Lime Company-O & G, LLC, has royalty and non-operated working interests in natural gas wells located in Johnson County, Texas, in the Barnett Shale Formation.

On May 2, 2024, the shareholders of the Company approved an increase in the Company’s number of authorized shares of common stock from 30,000,000 to 45,000,000. On July 12, 2024, the Company effected a 5-for-1 split of its common stock in the form of a stock dividend offour additional shares of common stock for each share outstanding to shareholders of record at the close of business on June 21, 2024 (the “Stock Split”). All share and per share information, including stock-based compensation, throughout this Annual Report on Form 10-K has been retroactively adjusted to reflect the Stock Split. The shares of common stock retain a par value of$0.10 per share. Accordingly, an amount equal to the aggregate par value of the additional shares issued in the Stock Split was reclassified from additional paid-in capital to common stock for all periods presented.

The number and terms of stock-based compensation awards outstanding on the date of the Stock Split were adjusted, in order to prevent dilution or enlargement of the rights of participants under the Company’s 2001 Long-Term Incentive Plan, as Amended and Restated (the “Plan”). The fair value of all outstanding awards immediately after the Stock Split did not change when compared to the fair value of such awards immediately prior to the Stock Split. In addition, there was no change to the vesting conditions or classification of any of the awards. No incremental compensation expense was recognized as a result of such adjustments.

(b) Principles of Consolidation

The consolidated financial statements include the accounts of the Company and its subsidiaries. All intercompany balances and transactions have been eliminated.

(c) Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“US GAAP”) requires management to make estimates and judgments that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates and judgments.

(d) Statements of Cash Flows

For purposes of reporting cash flows, the Company considers all bank deposits and highly liquid debt instruments, such as United States Treasury bills and notes, with maturities, at the time of purchase, of three months or less to be cash equivalents. Cash equivalents are carried at cost plus accrued interest, which approximates fair market value. Supplemental cash flow information is presented below:

(e) Revenue Recognition

The Company recognizes revenue for its lime and limestone operations when (i) a contract with the customer exists and the performance obligations are identified; (ii) the price has been established; and (iii) the performance obligations have been satisfied, which is at a point in time, generally upon shipment. Revenues include external freight billed to customers with related costs accounted for as fulfillment costs and included in cost of revenues. The Company operates within a single geographic region. The Company’s returns and allowances are minimal. External freight billed to customers included in revenues was$45,514, $46,270, and $44,233 for 2024, 2023, and 2022, respectively, which approximates the amount of external freight included in cost of revenues. Sales taxes billed to customers are not included in revenues.

(f) Fair Values of Financial Instruments

Fair value is defined as “the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date.” The carrying values of cash and cash equivalents, trade receivables, other current assets, accounts payable, and accrued expenses approximate fair value due to the short maturities of these instruments.

(g) Concentration of Credit Risk and Trade Receivables

Financial instruments that potentially subject the Company to a concentration of credit risk consist principally of cash and cash equivalents and trade receivables. The Company places its cash and cash equivalents with high-credit quality financial institutions and in highly rated commercial paper or United States Treasury bills and notes with maturities, at the time of purchase, of three months or less. The Company’s cash and cash equivalents at commercial banking institutions normally exceed federally insured limits.

The majority of the Company’s trade receivables are unsecured. Payment terms for all trade receivables are based on the underlying purchase orders, contracts, or purchase agreements, and are generally fixed, short-term, and do not contain a significant financing component. The Company estimates credit losses relating to trade receivables based on an assessment of the current and forecasted probability of collection, historical trends, economic conditions, and other significant events that may impact the collectability of trade receivables. Due to the relatively homogenous nature of its trade receivables, the Company does not believe there is any meaningful asset-specific differences within its accounts receivable portfolio that would require the portfolio to be grouped below the consolidated level for review of credit losses. Credit losses relating to trade receivables have generally been within management expectations and historical trends. Uncollected trade receivables are

charged-off when identified by management to be unrecoverable. Trade receivables are presented net of the related estimated credit losses, which totaled$601 and $575 at December 31, 2024 and 2023, respectively. Additions, adjustments for expected credit loss factors, and write-offs to the Company’s estimated credit losses during the years ended December 31 were as follows:

(h) Inventories

Inventories are valued principally at the lower of cost, determined using the average cost method, or net realizable value. Costs for raw materials and finished goods include materials, labor, and production overhead. A summary of inventories is as follows:

(i) Property, Plant and Equipment

For major constructed assets, the capitalized cost includes the price paid by the Company for labor and materials plus interest and internal and external project management costs that are directly related to the constructed assets. Machinery and equipment at December 31, 2024 and 2023 included $8,098 and $6,001, respectively, of construction in progress for various capital projects. No interest costs were capitalized for the years ended December 31, 2024 and 2023. At December 31, 2024 and 2023, accounts payable and accrued expenses included $1,657 and $1,196, respectively, of capitalized costs. Selling, general, and administrative expenses included depreciation expense of $318, $294, and $278 in 2024, 2023, and 2022, respectively. Depreciation of property, plant and equipment is being provided for by the straight-line method over estimated useful lives as follows:

Maintenance and repairs are charged to expense as incurred; renewals and betterments are capitalized. When units of property are retired or otherwise disposed of, their cost and related accumulated depreciation are removed from the accounts, and any resulting gain or loss is credited or charged to income.

The Company expenses all exploration costs as incurred, as well as costs incurred at an operating quarry or mine, other than capital expenditures and inventory. Costs to acquire mineral reserves are capitalized upon acquisition. Costs incurred to develop new mineral reserves, to expand the capacity of a quarry or mine, or to develop quarry or mine areas substantially in advance of current production are capitalized once proven and probable reserves exist and can be economically produced. For each quarry or mine, capitalized costs to acquire and develop mineral reserves are depleted using the units-of-production method based on the proven and probable reserves for such quarry or mine.

The Company reviews its long-lived assets for impairment and, when events or circumstances indicate the carrying amount of an asset may not be recoverable, the Company determines if impairment of value exists. If the estimated undiscounted future net cash flows are less than the carrying amount of the asset, an impairment exists, and an impairment loss must be calculated and recorded. If an impairment exists, the impairment loss is calculated based on the excess of the carrying amount of the asset over the asset’s fair value. Any impairment loss is treated as a permanent reduction in the carrying value of the asset. The Company hadno impairments in the years presented in the financial statements.

(j) Asset Retirement Obligations

The Company recognizes legal obligations for reclamation and remediation associated with the retirement of long-lived assets at their fair value at the time the obligations are incurred (“AROs”). Over time, the liability for AROs is recorded at its present value each period through accretion expense, and the capitalized cost is depreciated over the useful life of the related asset. Upon settlement of the liability, the Company either settles the AROs for the recorded amount or recognizes a gain or loss. The Company’s AROs of$1,484 and $1,548 as of December 31, 2024 and 2023, respectively, are included in Other liabilities and Accrued expenses on the Company’s Consolidated Balance Sheets. As of December 31, 2024, assets, net of accumulated depreciation, associated with the Company’s AROs totaled$580. During 2024 and 2023, the Company spent$94 and $36, respectively, on its AROs, and recognized accretion expense of $102, $99, and $97 in 2024, 2023, and 2022, respectively, on its AROs.

The AROs were estimated based on studies and the Company’s process knowledge and estimates and are discounted using a credit adjusted risk-free interest rate. The AROs are adjusted when further information warrants an adjustment. The Company estimates annual expenditures of approximately $100 per year in years 2025 through 2029 relating to its AROs.

(k) Accrued Expenses

Accrued expenses consist of the following:

(l) Environmental Expenditures

Environmental expenditures that relate to current operations are expensed or capitalized as appropriate. Expenditures that relate to an existing condition caused by past operations, and which do not contribute to current or future revenue generation, are expensed. Liabilities are recorded at their present value when environmental assessments and/or remedial efforts are probable, and the costs can be reasonably estimated. Generally, the timing of these accruals will coincide with completion of a feasibility study or the Company’s commitment to a formal plan of action.

The Company incurred capital expenditures related to environmental matters of $997 in 2024, $1,456 in 2023, and $779 in 2022.

(m) Income and Dividends Per Share of Common Stock

The following table sets forth the computation of basic and diluted income per common share:

The Company paid $0.20, $0.16, and $0.16 of cash dividends per share of common stock in 2024, 2023, and 2022, respectively.

(n) Stock-Based Compensation

The Company expenses all stock-based payments to employees and directors, including grants of stock options and restricted stock, in the Company’s Consolidated Statements of Income based on their fair values. Compensation cost is recognized on a straight-line basis over the vesting period.

(o) Income Taxes

The Company utilizes the asset and liability approach in its reporting for income taxes. Deferred income tax assets and liabilities are computed for differences between the financial statement and tax bases of assets and liabilities that will result in taxable or deductible amounts in the future based on enacted tax laws and rates applicable to the periods in which the differences are expected to affect taxable income. Valuation allowances

are established when necessary to reduce deferred tax assets to the amount more likely than not to be realized. Income tax related interest and penalties are included in income tax expense.

The Company also assesses individual tax positions to determine if they meet the criteria for some or all of the benefits of that position to be recognized in the Company’s financial statements. The Company only recognizes tax positions that meet the more-likely-than-not recognition threshold.

(p)New Accounting Pronouncements

Segment Reporting – In November 2023, the Financial Accounting Standards Board (the “FASB”) issued guidance that expands segment disclosures for public entities, including requiring disclosure of significant segment expenses that are regularly provided to the chief operating decision maker (“CODM”), the title and position of the CODM and an explanation of how the CODM uses reported measures of segment profit or loss in assessing segment performance and allocating resources (“ASU 2023-07”). ASU 2023-07 also expands disclosures about a reportable segment’s profit or loss and assets in interim periods and clarifies that apublic entity may report additional measures of segment profit if the CODM uses more than one measure of a segment’s profit or loss. ASU 2023-07 does not remove existing segment disclosure requirements or change how a public entity identifies its operating segments, aggregates those operating segments, or determines its reportable segments. The Company adopted ASU 2023-07 in the fourth quarter 2024. See Note (9) Business Segment.

Improvements to Income Tax Disclosures – In December 2023, the FASB issued guidance that expands income tax disclosures for public entities, including requiring enhanced disclosures related to the rate reconciliation and income taxes paid information (“ASU 2023-09”). ASU 2023-09 is effective for annual disclosures for fiscal years beginning after December 15, 2024, with early adoption permitted. The guidance should be applied on a prospective basis, with retrospective application to all prior periods presented in the financial statements permitted. The Company is currently evaluating the impact ASU 2023-09 will have on its financial statements and related disclosures.

Expense Disaggregation Disclosures - In November 2024, the FASB issued guidance that requires disclosure of specified information about certain costs and expenses in the notes to the consolidated financial statements (“ASU 2024-03”). ASU 2024-03 is effective for annual periods beginning after December 15, 2026, and interim periods within annual periods beginning after December 15, 2027, with early adoption permitted. ASU 2024-03 is to be applied on a prospective basis, with retrospective application permitted. The Company is evaluating the impact, if any, of ASU 2024-03 on its financial statements and related disclosures.

**(2)**Banking Facilities and Debt

The Company’s credit agreement with Wells Fargo Bank, N.A. (the “Lender”), as amended as of August 3, 2023, provides for a $75,000 revolving credit facility (the “Revolving Facility”) and an incremental four-year accordion feature to borrow up to an additional $50,000 on the same terms, subject to approval by the Lender or another lender selected by the Company. The credit agreement also provides for a$10,000 letter of credit sublimit under the Revolving Facility. The Revolving Facility and any incremental loans mature on August 3, 2028.

Interest rates on the Revolving Facility are, at the Company’s option, SOFR, plus a SOFR adjustment rate of 0.10%, plus a margin of 1.000% to 2.000%, or the Lender’s Prime Rate, plus a margin of 0.000% to 1.000%, and a commitment fee range of 0.225% to 0.350% on the undrawn portion of the Revolving Facility. The Revolving Facility interest rate margins and commitment fee are determined quarterly in accordance with a pricing grid based upon the

Company’s Cash Flow Leverage Ratio, defined as the ratio of the Company’s total funded senior indebtedness to earnings before interest, taxes, depreciation, depletion, amortization, and stock-based compensation expense (“EBITDA”) for the 12 months ended on the last day of the most recent calendar quarter, plus pro forma EBITDA from any businesses acquired during the period. Pursuant to a security agreement, dated August 25, 2004, the Revolving Facility is secured by the Company’s existing and hereafter acquired tangible assets, intangible assets, and real property. The maturity of the Revolving Facility and any incremental loans can be accelerated if any event of default, as defined under the credit agreement, occurs. The Company’s maximum Cash Flow Leverage Ratio is 3.50 to 1.

The Company may pay dividends so long as it remains in compliance with the provisions of the Company’s credit agreement, and may purchase, redeem, or otherwise acquire shares of its common stock so long as its pro forma Cash Flow Leverage Ratio is less than 3.00 to 1.00 and no default or event of default exists or would exist after giving effect to such stock repurchase.

The Company hadno debt outstanding at December 31, 2024 or 2023. The Company had$6,632 of letters of credit issued at December 31, 2024, which count as draws against the available commitment under the Revolving Facility.

**(3)**Leases

The Company has operating leases for the use of equipment, corporate office space, and some of its terminal and distribution facilities. The leases have remaining lease terms of 0 to 7 years, with a weighted-average remaining lease term of 4 years at December 31, 2024. Some operating leases include options to extend the leases for up to 5 years. The Company’s lease calculations include the impact of options to extend when it is reasonably certain the Company will exercise the option. The Company used a weighted-average discount rate of 6.4% and 6.2% for leases entered into during 2024 and 2023, respectively. The components of net operating lease costs for 2024, 2023, and 2022 were as follows (in thousands):

As of December 31, 2024, future minimum payments under operating leases that were either non-cancelable or subject to significant penalty upon cancellation, including future minimum payments under renewal options that the Company is reasonably certain to exercise, were as follows (in thousands):

Supplemental cash flow information pertaining to the Company’s leasing activity for the years ended December 31, 2024, 2023, and 2022 was as follows (in thousands):

**(4)**Income Taxes

Income tax expense (benefit) for the years ended December 31 was as follows:

A reconciliation of income taxes computed at the federal statutory rate to income tax expense for the years ended December 31 is as follows:

Components of the Company’s deferred tax liabilities and assets are as follows:

Current income taxes are classified on the Company’s Consolidated Balance Sheets as follows:

The Company hadno federal net operating loss carry forwards at December 31, 2024. The Company reduces deferred tax assets by a valuation allowance if, based on the weight of available evidence, it is “more likely than not” that some portion or all of the deferred tax assets will not be realized. Deferred tax assets are considered fully recognizable because of the Company’s recent income history and expectations of income in the future. The Company’s federal income tax returns for the year ended December 31, 2021 and subsequent years remain subject to examination. The Company’s income tax returns in certain state income tax jurisdictions remain subject to examination for various periods for the year ended December 31, 2020 and subsequent years.

**(5)**Employee Retirement Plans

The Company has a contributory retirement (401(k)) savings plans for non-union employees and for union employees of Arkansas Lime Company, Carthage, and Texas Lime Company. Company contributions to these plans were $352, $329 and $311 in 2024, 2023, and 2022, respectively.

**(6)**Stock-Based Compensation

The Plan provides for stock options, restricted stock, and dollar-denominated cash awards, including performance-based awards. In addition to stock options, restricted stock, and cash awards, the Plan provides for the grant of stock appreciation rights, deferred stock, and other stock-based awards to directors, officers, employees, and consultants.

The Plan was amended in 2024 to increase the number of shares of Company common stock reserved for stock-based awards under the Plan and to make other changes. At December 31, 2024, the number of shares of common stock remaining available for future grants of stock options, restricted stock, or other forms of stock-based awards under the Plan was 837,225. Stock options granted under the Plan expireten years from the date of grant and generally become exercisable, or vest, immediately. Restricted stock generally vests over periods ofone-half tothree years. Upon the

exercise of stock options, the Company issues common stock from its non-issued authorized or treasury shares that have been reserved for issuance pursuant to the Plan. Forfeitures are recognized in the period they occur.

The Company recorded $4,893, $3,182, and $2,636 for stock-based compensation expense related to stock options and shares of restricted stock for 2024, 2023, and 2022, respectively. The amounts included in cost of revenues were $320, $248, and $211 and in selling, general and administrative expense were $4,573, $2,934, and $2,425, for 2024, 2023, and 2022, respectively.

A summary of the Company’s stock option and restricted stock activity and related information for the year ended December 31, 2024 and certain other information for the years ended December 31, 2024, 2023, and 2022 are as follows:

There were 12,500 non-vested stock options at December 31, 2024, and the weighted-average remaining contractual life of the outstanding and exercisable stock options at such date was 5.92 years. The total compensation cost not yet recognized for restricted stock at December 31, 2024 was $7,190, which will be recognized over the weighted average of 1.04 years.

The fair value for the stock options was estimated at the date of grant using a lattice-based option valuation model, with the following weighted-average assumptions for the 2024, 2023, and 2022 grants: risk-free interest rates of 4.57% in 2024,3.41% to 3.84% (weighted average 3.74%) in 2023, and 2.92% to 3.94% (weighted average 3.74%) in 2022; a dividend yield of 0.31% in 2024,0.35% to 0.48% (weighted average 0.39%) in 2023, and 0.57% to 0.73% (weighted average 0.62%) in 2022; and a volatility factor of.406 in 2024,.389 to.400 (weighted average.397) in 2023, and.374 to.385 (weighted average.382) in 2022, based on the daily per-share closing prices forfive years preceding the date of issuance. In addition, the fair value of these options was estimated based on an expected life offive years. The fair value of restricted stock is based on the closing per-share price of the Company’s common stock on the date of grant.

**(7)**Share Repurchases

During 2024, pursuant to provisions in the Plan that allow employees and directors to pay the tax withholding liability upon the lapse of restrictions on restricted stock in either cash and/or delivery of shares of the Company’s common stock, the Company repurchased 28,028 shares at a weighted-average price of $125.09 per share.

**(8)**Commitments and Contingencies

The Company is party to lawsuits and claims arising in the normal course of business, none of which, in the opinion of management, is expected to have a material adverse effect on the Company’s financial condition, results of operations, cash flows, or competitive position.

The Company is not contractually committed to any planned capital expenditures until actual orders are placed for equipment or services. At December 31, 2024, the Company had $35,480 for open equipment and construction contracts.

**(9)**Reportable Segment

In November 2023, the FASB amended guidance in ASC 280,Segment Reporting(“ASC 280”) by issuing ASU 2023-07, which updated the disclosure requirements for reportable segments, primarily through requiring enhanced disclosures about significant segment expenses. The Company adopted this guidance in the fourth quarter 2024, with retrospective application to the years ending December 31, 2023 and 2022. See Note 1(p).

The Company is managed asone reportable segment, lime and limestone operations, based on the distinctness of the Company’s activities and products. All operations are in the United States. During 2024, the Company determined that the activities of its natural gas interests and the associated level of review of those activities by the CODM precluded the natural gas activities from meeting the definition of an operating segment, as provided in ASC 280. In addition, previously unallocated items, including cash, interest income and expense and other expense are now included as part of lime and limestone operations, and consolidated net income is now used as the measure of segment profit or loss. Segment disclosures for 2023 and 2022 have been recast to be consistent with the 2024 presentation.

The Company’s CODM is the chief executive officer. The lime and limestone operations segment derives revenues from the sale of crushed limestone, pulverized limestone, aggregate, quicklime, hydrated lime, and lime slurry. The accounting policies of the lime and limestone operations segment are the same as those described in Note (1) Summary of Significant Accounting Policies.

In evaluating the operating results of the Company, the CODM assesses performance for the lime and limestone operations segment and decides how to allocate resources (including, but not limited to, decisions on fuel blends, capital purchases, and staffing levels) based on net income that is also reported on the consolidated statements of income. The measure of segment assets is reported on the consolidated balance sheets as “Total assets” and the measure of segment capital expenditures is reported on the consolidated statements of cash flows as “Purchase of property, plant, and equipment.”

The following table presents revenue, significant expenses, and profit for the years ended December 31, 2024, 2023, and 2022 as reviewed and used by the CODM. There are no other significant segment items or reconciling items to consolidated net income.

**(10)**Subsequent Events

On February 3, 2025, the Company declared an increased regular quarterly cash dividend of $0.06 per share on the Company’s common stock. This dividend is payable on March 14, 2025 to shareholders of record at the close of business on February 21, 2025.