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    SEC Form 10-Q filed by Knife Riv Holding Co.

    5/6/25 4:36:47 PM ET
    $KNF
    Mining & Quarrying of Nonmetallic Minerals (No Fuels)
    Industrials
    Get the next $KNF alert in real time by email
    knf-20250331
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    UNITED STATES
    SECURITIES AND EXCHANGE COMMISSION
    WASHINGTON, D.C. 20549
    FORM 10-Q
    ☒QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
    For the quarterly period ended March 31, 2025
    OR
    ☐
    TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
    For the transition period from _____________ to ______________
    Commission file number 1-41642
    Knife River Corporation
    (Exact name of registrant as specified in its charter)
    Delaware92-1008893
    (State or other jurisdiction of
    incorporation or organization)
    (I.R.S. Employer Identification No.)

    1150 West Century Avenue
    P.O. Box 5568
    Bismarck, North Dakota 58506-5568
    (Address of principal executive offices)
    (Zip Code)
    (701) 530-1400
    (Registrant's telephone number, including area code)

    Securities registered pursuant to Section 12(b) of the Act:
    Title of each classTrading symbol(s)Name of each exchange on which registered
    Common Stock, $0.01 par valueKNFNew York Stock Exchange
    Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐.
    Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐.
    Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.
    Large Accelerated Filer
    ☒
    Accelerated Filer
    ☐
    Non-Accelerated Filer
    ☐
    Smaller Reporting Company
    ☐
    Emerging Growth Company
    ☐
    If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐
    Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒.
    Indicate the number of shares outstanding of each of the issuer's classes of common stock, as of May 1, 2025: 56,652,361 shares.


    Index
    Index
    Page
    Introduction
    3
    Part I -- Financial Information
    Item 1. Financial Statements
    4
    Consolidated Statements of Operations -- Three Months Ended March 31, 2025 and 2024
    4
    Consolidated Statements of Comprehensive Income -- Three Months Ended March 31, 2025 and 2024
    5
    Consolidated Balance Sheets -- March 31, 2025 and 2024, and December 31, 2024
    6
    Consolidated Statements of Equity -- Three Months Ended March 31, 2025 and 2024
    7
    Consolidated Statements of Cash Flows -- Three Months Ended March 31, 2025 and 2024
    8
    Notes to Consolidated Financial Statements
    9
    1. Background
    9
    2. Basis of presentation
    9
    3. New accounting standards
    10
    4. Receivables and allowance for expected credit losses
    11
    5. Inventories
    11
    6. Net loss per share
    12
    7. Accumulated other comprehensive loss
    12
    8. Revenue from contracts with customers
    12
    9. Uncompleted contracts
    13
    10. Acquisitions and Dispositions
    14
    11. Goodwill and other intangible assets
    16
    12. Fair value measurements
    17
    13. Debt
    19
    14. Cash flow information
    20
    15. Business segment data
    20
    16. Commitments and contingencies
    22
    17. Related-party transactions
    22
    Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations
    23
    Item 3. Quantitative and Qualitative Disclosures About Market Risk
    36
    Item 4. Controls and Procedures
    37
    Part II -- Other Information
     
    Item 1. Legal Proceedings
    38
    Item 1A. Risk Factors
    38
    Item 2. Unregistered Sales of Equity Securities and Use of Proceeds
    38
    Item 3. Defaults Upon Senior Securities
    38
    Item 4. Mine Safety Disclosures
    38
    Item 5. Other Information
    38
    Item 6. Exhibits
    38
    Exhibits Index
    39
    Signatures
    40
    Unless otherwise stated or the context otherwise requires, references in this report to “Knife River,” the “Company,” “we,” “our,” or “us” refer to Knife River Corporation and its consolidated subsidiaries.
    2

    Index
    Introduction
    Knife River is an aggregates-led construction materials and contracting services provider in the United States. Our 1.2 billion tons of aggregate reserves, as of December 31, 2024, provide the foundation for our vertically integrated business strategy, with approximately 37 percent of our aggregates being used internally to support value-added downstream products (ready-mix concrete and asphalt) and contracting services (heavy-civil construction, asphalt paving, concrete construction, site development and grading services, and in some segments the manufacturing of prestressed concrete products). We are strategically focused on being the provider of choice in mid-size, high-growth markets and are committed to our plan for continued growth and to delivering for our stakeholders — customers, communities, employees and stockholders — by executing on our four core values: People, Safety, Quality and the Environment.
    We supply construction materials to customers from 14 states and also provide related contracting services, which are primarily to public-sector customers for the development and servicing of highways, local roads, bridges and other public-infrastructure projects. We have broad access to high-quality aggregates in most of our markets, which forms the foundation of our vertically integrated business model. We share resources, including plants, equipment and people, across our various locations to maximize efficiency. We also transport our products by truck, rail and barge, depending on the particular market, to complete the vertical value chain. Our strategically located aggregate sites, ready-mix plants and asphalt plants, along with our fleet of ready-mix and dump trucks, enable us to better serve our customers. We believe our integrated and expansive business model is a strong competitive advantage that provides scale, efficiency and operational excellence for the benefit of customers, stockholders and the broader communities that we serve.
    In January 2025, we made a change to our organizational structure to better align with our business strategy. We reorganized our business segments to reflect changes in the way our chief operating decision maker evaluates performance, makes operating decisions and allocates resources. Our former Pacific and Northwest operating segments were combined to form the new West operating segment. Our former North Central and South operating segments were combined to form the new Central operating segment. The reorganization resulted in four operating segments: West, Mountain, Central and Energy Services, each of which is also a reportable segment. All periods have been recast to conform to the current reportable segment presentation.
    Three of the reportable segments are aligned by key geographic areas, West, Mountain and Central, due to the production of construction materials and related contracting services and one is based on product line. Each geographic segment offers a vertically integrated suite of products and services, including aggregates, ready-mix concrete, asphalt and contracting services, while the Energy Services segment, which has locations throughout our geographic footprint, produces and supplies liquid asphalt and related services, primarily for use in asphalt road construction. We also provide the details of Corporate Services, which includes accounting, legal, treasury, information technology, human resources, corporate development costs and certain corporate expenses that support our operating segments. For more information on our business segments, see Note 15 of the Notes to Consolidated Financial Statements.

    3

    Index
    Part I -- Financial Information
    Item 1. Financial Statements
    Knife River Corporation
    Consolidated Statements of Operations
    (Unaudited)
    Three Months Ended
     March 31,
     20252024
     (In thousands, except per share amounts)
    Revenue:  
    Construction materials$213,407 $204,095 
    Contracting services140,064 125,495 
    Total revenue353,471 329,590 
    Cost of revenue:  
    Construction materials233,763 209,830 
    Contracting services129,303 113,266 
    Total cost of revenue363,066 323,096 
    Gross profit(9,595)6,494 
    Selling, general and administrative expenses73,058 60,221 
    Operating loss(82,653)(53,727)
    Interest expense15,263 13,976 
    Other income4,567 3,748 
    Loss before income taxes(93,349)(63,955)
    Income tax benefit(24,639)(16,326)
    Net loss$(68,710)$(47,629)
    Net loss per share  
    Basic $(1.21)$(.84)
    Diluted$(1.21)$(.84)
    Weighted average common shares outstanding:
    Basic56,62656,590
    Diluted 56,62656,590
    The accompanying notes are an integral part of these consolidated financial statements.
    4

    Index
    Knife River Corporation
    Consolidated Statements of Comprehensive Income
    (Unaudited)
    Three Months Ended
     March 31,
     20252024
     (In thousands)
    Net loss$(68,710)$(47,629)
    Other comprehensive income:
    Postretirement liability adjustment:
    Amortization of postretirement liability losses included in net periodic benefit cost, net of tax of $20 and $25 for the three months ended 2025 and 2024, respectively
    63 78 
    Postretirement liability adjustment63 78 
    Other comprehensive income63 78 
    Comprehensive loss attributable to common stockholders
    $(68,647)$(47,551)
    The accompanying notes are an integral part of these consolidated financial statements.
    5

    Index
    Knife River Corporation
    Consolidated Balance Sheets
    (Unaudited)
     March 31, 2025March 31, 2024December 31, 2024
    (In thousands, except shares and per share amounts)
    Assets
    Current assets:  
    Cash, cash equivalents and restricted cash$138,482 $170,658 $281,134 
    Receivables, net238,066 183,708 267,240 
    Costs and estimated earnings in excess of billings on uncompleted contracts28,505 33,559 31,283 
    Inventories467,051 375,783 380,336 
    Prepayments and other current assets74,600 54,051 27,675 
    Total current assets946,704 817,759 987,668 
    Noncurrent assets:  
    Net property, plant and equipment1,743,513 1,320,612 1,441,700 
    Goodwill449,554 274,478 297,225 
    Other intangible assets, net41,967 10,277 29,414 
    Operating lease right-of-use assets46,516 45,832 49,378 
    Investments and other52,453 44,685 45,817 
    Total noncurrent assets 2,334,003 1,695,884 1,863,534 
    Total assets$3,280,707 $2,513,643 $2,851,202 
    Liabilities and Stockholders' Equity  
    Current liabilities:  
    Long-term debt - current portion$11,780 $7,072 $10,475 
    Accounts payable111,962 97,379 140,834 
    Billings in excess of costs and estimated earnings on uncompleted contracts42,016 50,844 42,126 
    Accrued compensation18,983 17,699 50,655 
    Accrued interest
    15,951 15,459 5,535 
    Other taxes payable
    14,195 11,884 8,286 
    Current operating lease liabilities 13,398 13,282 14,844 
    Other accrued liabilities93,781 83,611 97,282 
    Total current liabilities 322,066 297,230 370,037 
    Noncurrent liabilities:  
    Long-term debt1,160,385 673,539 666,911 
    Deferred income taxes221,588 174,122 174,727 
    Noncurrent operating lease liabilities33,118 32,551 34,534 
    Other135,966 117,574 128,908 
    Total liabilities 1,873,123 1,295,016 1,375,117 
    Commitments and contingencies
    Stockholders' equity:  
    Common stock, 300,000,000 shares authorized, $0.01 par value, 57,083,497 shares issued and 56,652,361 shares outstanding at March 31, 2025; 57,040,840 shares issued and 56,609,704 shares outstanding at March 31, 2024; 57,043,841 shares issued and 56,612,705 shares outstanding at December 31, 2024
    571 570 570 
    Other paid-in capital621,042 614,679 620,897 
    Retained earnings798,836 618,245 867,546 
    Treasury stock held at cost - 431,136 shares
    (3,626)(3,626)(3,626)
    Accumulated other comprehensive loss(9,239)(11,241)(9,302)
    Total stockholders' equity1,407,584 1,218,627 1,476,085 
    Total liabilities and stockholders' equity $3,280,707 $2,513,643 $2,851,202 
    The accompanying notes are an integral part of these consolidated financial statements.
    6

    Index
    Knife River Corporation
    Consolidated Statements of Equity
    (Unaudited)
    Common StockOther
    Paid-in Capital
    Retained EarningsTreasury Stock
    Accumulated Other Comprehensive Loss
    SharesAmountSharesAmountTotal
     (In thousands, except shares)
    At December 31, 2024
    57,043,841 $570 $620,897 $867,546 (431,136)$(3,626)$(9,302)$1,476,085 
    Net loss— — — (68,710)— — — (68,710)
    Other comprehensive income— — — — — — 63 63 
    Stock-based compensation expense
    — — 2,799 — — — — 2,799 
    Common stock issued for employee compensation, net of tax withholding
    39,656 1 (2,654)— — — — (2,653)
    At March 31, 202557,083,497 $571 $621,042 $798,836 (431,136)$(3,626)$(9,239)$1,407,584 
    The accompanying notes are an integral part of these consolidated financial statements.

    Knife River Corporation
    Consolidated Statements of Equity
    (Unaudited)
    Common StockOther
    Paid-in Capital
    Retained EarningsTreasury Stock
    Accumulated Other Comprehensive Loss
    SharesAmountSharesAmountTotal
     (In thousands, except shares)
    At December 31, 2023
    57,009,542 $570 $614,513 $665,874 (431,136)$(3,626)$(11,319)$1,266,012 
    Net loss— — — (47,629)— — — (47,629)
    Other comprehensive income— — — — — — 78 78 
    Stock-based compensation expense
    — — 1,811 — — — — 1,811 
    Common stock issued for employee compensation, net of tax withholding31,298 — (1,645)— — — — (1,645)
    At March 31, 2024
    57,040,840 $570 $614,679 $618,245 (431,136)$(3,626)$(11,241)$1,218,627 
    The accompanying notes are an integral part of these consolidated financial statements.
    7

    Index
    Knife River Corporation
    Consolidated Statements of Cash Flows
    (Unaudited)
    Three Months Ended
     March 31,
     20252024
     (In thousands)
    Operating activities:  
    Net loss$(68,710)$(47,629)
    Adjustments to reconcile net loss to net cash used by operating activities:
      
    Depreciation, depletion and amortization38,762 32,212 
    Deferred income taxes437 (311)
    Provision for credit losses335 (6)
    Amortization of debt issuance costs787 691 
    Employee stock-based compensation costs2,799 1,811 
    Pension and postretirement benefit plan net periodic benefit cost 360 303 
    Unrealized (gains) losses on investments692 (1,212)
    Gains on sales of assets(2,410)(1,249)
    Gain on bargain purchase
    (3,547)— 
    Equity in (losses) earnings of unconsolidated affiliates15 (4)
    Changes in current assets and liabilities, net of acquisitions:
    Receivables41,081 76,816 
    Inventories(50,360)(56,160)
    Other current assets(35,473)(16,528)
    Accounts payable(12,772)(4,183)
    Other current liabilities(40,255)(39,691)
    Pension and postretirement benefit plan contributions(158)(128)
    Other noncurrent changes3,140 12,058 
    Net cash used in operating activities(125,277)(43,210)
    Investing activities:  
    Capital expenditures(74,958)(43,689)
    Acquisitions, net of cash acquired(443,439)— 
    Net proceeds from sale or disposition of property and other17,524 1,629 
    Investments(2,760)(3,009)
    Net cash used in investing activities(503,633)(45,069)
    Financing activities:  
    Issuance of long-term debt500,000 — 
    Repayment of long-term debt(19)(1,738)
    Debt issuance costs(11,070)— 
    Tax withholding on stock-based compensation
    (2,653)(1,645)
    Net cash provided by (used in) financing activities486,258 (3,383)
    Decrease in cash, cash equivalents and restricted cash(142,652)(91,662)
    Cash, cash equivalents and restricted cash -- beginning of year281,134 262,320 
    Cash, cash equivalents and restricted cash -- end of period$138,482 $170,658 
    The accompanying notes are an integral part of these consolidated financial statements.
    8

    Index
    Knife River Corporation
    Notes to Consolidated
    Financial Statements
    March 31, 2025 and 2024
    (Unaudited)
    Note 1 - Background
    At Knife River, we are a people-first construction materials and contracting services company. We provide construction materials and contracting services to build safe roads, bridges, airport runways and other critical infrastructure needs that connect people with where they want to go and with the supplies they need. We are one of the leading providers of crushed stone and sand and gravel in the United States and operate across 14 states. We conduct our operations through four reportable segments: West, Mountain, Central and Energy Services.
    In January 2025, we made a change to our organizational structure to better align with our business strategy. We reorganized our business segments to reflect changes in the way our chief operating decision maker evaluates performance, makes operating decisions and allocates resources. Our former Pacific and Northwest operating segments were combined to form the new West operating segment. Our former North Central and South operating segments were combined to form the new Central operating segment. The reorganization resulted in four operating segments: West, Mountain, Central and Energy Services, each of which is also a reportable segment. Each segment’s performance is evaluated based on segment results without allocating corporate expenses, which include corporate costs associated with accounting, legal, treasury, business development, information technology, human resources, and other corporate expenses that support the operating segments. Prior periods have been recast to conform to the current reportable segment presentation.
    Note 2 - Basis of presentation
    The accompanying consolidated interim financial statements were prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Interim financial statements do not include all disclosures provided in annual financial statements and, accordingly, these financial statements should be read in conjunction with the Company's 2024 Annual Report on Form 10-K (Annual Report). The information is unaudited but includes adjustments that are, in the opinion of management, necessary for a fair presentation of the accompanying consolidated interim financial statements and are of a normal recurring nature.
    All revenues and costs, as well as assets and liabilities, directly associated with our business activities are included in the consolidated financial statements. General corporate expenses are included in the Consolidated Statements of Operations within selling, general and administrative expenses and other income.
    On March 7, 2025, we acquired Strata Corporation (Strata), a leading construction materials and contracting services provider in North Dakota and northwestern Minnesota. The purchase price for Strata totaled $454.0 million and is subject to post-closing adjustments. The results of operations and balance sheet accounts for Strata are included in the consolidated financial statements from the date of acquisition.
    Management has also evaluated the impact of events occurring after March 31, 2025, up to the date of issuance of these consolidated interim financial statements on May 6, 2025, that would require recognition or disclosure in the Consolidated Financial Statements.
    Principles of consolidation
    For all periods, the consolidated financial statements were prepared in accordance with GAAP and include the accounts of Knife River and its wholly owned subsidiaries. All intercompany accounts and transactions between the businesses comprising Knife River have been eliminated in the accompanying audited consolidated financial statements.
    Use of estimates
    The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities, at the date of the consolidated financial statements, as well as the reported amounts of revenues and expenses during the reporting period. Estimates are used for items such as long-lived assets and goodwill; fair values of acquired assets and liabilities under the acquisition method of accounting; aggregate reserves; property depreciable lives; tax provisions; revenue recognized using the cost-to-cost measure of progress for contracts; expected credit losses; environmental and other loss contingencies; costs on contracting services contracts; actuarially determined benefit costs; asset retirement obligations; present value of right-of-use assets and lease liabilities; and the valuation of stock-based compensation. These estimates are based on management’s best knowledge of current events, historical experience, actions that we may undertake in the future and on various other assumptions that are believed to be reasonable under the circumstances. As additional information becomes available, or actual amounts are determinable, the recorded estimates are revised. Consequently, operating results can be affected by revisions to prior accounting estimates.
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    Index
    Cash, cash equivalents and restricted cash
    We consider all highly liquid investments with an original maturity of three months or less, when purchased, to be cash and cash equivalents. Restricted cash represents deposits held by our captive insurance company that is required by state insurance regulations to remain in the captive insurance company. Cash, cash equivalents and restricted cash on the Consolidated Balance Sheets is comprised of:
    March 31, 2025March 31, 2024December 31, 2024
    (In thousands)
    Cash and cash equivalents
    $86,118$128,359$236,799
    Restricted cash
    52,36442,29944,335
    Cash, cash equivalents and restricted cash
    $138,482$170,658$281,134
    Seasonality of operations
    Some of our operations are seasonal and revenues from, and certain expenses for, such operations may fluctuate significantly among quarterly periods, with lower activity in the winter months and higher activity in the summer months. Accordingly, the interim results for particular segments, and for Knife River as a whole, may not be indicative of results for the full fiscal year or other future periods.
    Note 3 - New accounting standards
    The following table provides a brief description of the accounting pronouncements applicable to Knife River and the potential impact on its consolidated financial statements and/or disclosures:
    StandardDescriptionStandard Effective DateImpact on financial statements/disclosures
    Recently adopted Financial Accounting Standards Board (FASB) accounting standards updates (ASU)
    ASU 2023-07 - Improvements to Reportable Segment DisclosuresIn November 2023, the FASB issued guidance on modifying the disclosure requirements to improve reportable segment disclosure requirements through enhanced disclosures about significant segment expenses. The guidance also expands the interim disclosure requirements. The guidance is to be applied on a retrospective basis to the financial statements and footnotes and early adoption is permitted.
    Adopted for the year ended December 31, 2024.
    We updated our disclosures for the year ended December 31, 2024 and interim periods for 2025 to incorporate the required changes.
    ASU 2023-09 - Improvements to Income Tax DisclosuresIn December 2023, the FASB issued guidance on modifying the disclosure requirements to increase transparency about income tax information through improvements to income tax disclosures primarily related to the rate reconciliation and income taxes paid information. The guidance is to be applied on a prospective basis to the financial statements and footnotes, however, retrospective adoption is also permitted. The guidance also permits early adoption.
    Adopted for the year ended December 31, 2024.
    We updated our disclosures, which were not material, for the year ended December 31, 2024.
    Recently issued ASU's not yet adopted
    ASU 2024-03 -Disaggregation of Income Statement Expenses
    In November 2024, the FASB issued guidance on modifying the disclosure requirements to improve the disclosures for a public entity's expenses and address requests from investors for more detailed information about the types of expenses in commonly presented expense captions. The guidance is to be applied either on a prospective basis to the financial statements issued for reporting periods after the effective date or on a retrospective basis to the financial statements to all prior periods presented in the financial statements. Early adoption is permitted.
    Annual reporting periods beginning after December 15, 2026 and interim reporting periods beginning after December 15, 2027.
    We are currently evaluating the impact the guidance will have on our disclosures for the year ended December 31, 2027 and interim periods for fiscal year 2028.
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    Index
    Note 4 - Receivables and allowance for expected credit losses
    Receivables consist primarily of trade and contract receivables for the sale of goods and services net of expected credit losses. A majority of our receivables are due in 30 days or less. The total balance of receivables past due 90 days or more was $27.3 million, $12.6 million and $14.3 million at March 31, 2025, March 31, 2024 and December 31, 2024, respectively. Receivables were as follows:
    March 31, 2025March 31, 2024December 31, 2024
    (In thousands)
    Trade receivables$122,828$107,834$134,480
    Contract receivables85,93950,427104,547
    Retention receivables33,61731,52432,558
    Receivables, gross242,384189,785271,585
    Less expected credit loss4,3186,0774,345
    Receivables, net$238,066$183,708$267,240
    Our expected credit losses are determined through a review using historical credit loss experience; changes in asset specific characteristics; current conditions; and reasonable and supportable future forecasts, among other specific account data, and is performed at least quarterly. We develop and document our methodology to determine our allowance for expected credit losses. Risk characteristics used by management may include customer mix, knowledge of customers and general economic conditions of the various local economies, among others. Specific account balances are written off when management determines the amounts to be uncollectible. Management has reviewed the balance reserved through the allowance for expected credit losses and believes it is reasonable.
    Details of our expected credit losses were as follows:
    WestMountainCentralEnergy ServicesTotal
     
    (In thousands)
    As of December 31, 2024
    $2,478 $780 $921 $166 $4,345 
    Current expected credit loss provision
    — 42 30 263 335 
    Less write-offs charged against the allowance73 8 18 263 362 
    At March 31, 2025
    $2,405 $814 $933 $166 $4,318 
    WestMountainCentralEnergy ServicesTotal
     
    (In thousands)
    As of December 31, 2023$3,057 $2,293 $718 $100 $6,168 
    Current expected credit loss provision(46)(47)87 — (6)
    Less write-offs charged against the allowance80 2 3 — 85 
    At March 31, 2024
    $2,931 $2,244 $802 $100 $6,077 
    Note 5 - Inventories
    Inventories on the Consolidated Balance Sheets were as follows:
     March 31, 2025March 31, 2024December 31, 2024
     (In thousands)
    Finished products$299,032 $242,952 $252,563 
    Raw materials126,949 95,132 91,334 
    Supplies and parts41,070 37,699 36,439 
    Total$467,051 $375,783 $380,336 

    Inventories are valued at the lower of cost or net realizable value using the average cost method. Inventories include production costs incurred as part of our aggregate mining activities. These inventoriable production costs include all mining and processing costs associated with the production of aggregates. Stripping costs incurred during the production phase, which represent costs of removing overburden and waste materials to access mineral deposits, are a component of inventoriable production costs.
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    Index
    Note 6 - Net loss per share
    Basic net loss per share is computed by dividing net loss by the weighted average number of shares of common stock outstanding during the applicable period. Diluted earnings per share is computed by dividing net income by the total of the weighted average number of shares of common stock outstanding during the applicable period, plus the effect of non-vested performance shares and restricted stock units. Our potentially dilutive securities have been excluded from the computation of diluted net loss per share as the effect would reduce the net loss per share and is considered antidilutive. Weighted average common shares outstanding is comprised of issued shares of 57,083,497 less shares held in treasury of 431,136. Basic and diluted net loss per share are calculated as follows, based on a reconciliation of the weighted-average common shares outstanding on a basic and diluted basis:
    Three Months Ended
    March 31,
    20252024
    (In thousands, except per share amounts)
    Net loss$(68,710)$(47,629)
    Weighted average common shares outstanding - basic56,626 56,590 
    Effect of dilutive performance shares and restricted stock units
    — — 
    Weighted average common shares outstanding - diluted56,626 56,590 
    Shares excluded from the calculation of diluted loss per share
    274 179 
    Net loss per share - basic
    $(1.21)$(.84)
    Net loss per share - diluted
    $(1.21)$(.84)
    Note 7 - Accumulated other comprehensive loss
    Comprehensive income (loss) is comprised of net income (loss) and other comprehensive income (loss). The only component of other comprehensive income (loss) is the amortization of postretirement liability losses for our benefit plans. As of March 31, 2025 and 2024, and December 31, 2024, accumulated other comprehensive loss was $9.2 million, $11.2 million and $9.3 million, respectively.
    For the three months ended March 31, 2025 and 2024, we amortized $63,000 and $78,000, respectively, of expense into other income, and $20,000 and $25,000, respectively, into income taxes.
    Note 8 - Revenue from contracts with customers
    Revenue is recognized when a performance obligation is satisfied by transferring control over a product or service to a customer. Revenue includes revenue from the sales of construction materials and contracting services. Revenue is measured based on consideration specified in a contract with a customer and excludes any sales incentives and amounts collected on behalf of third parties. Knife River is considered an agent for certain taxes collected from customers. As such, we present revenues net of these taxes at the time of sale to be remitted to governmental authorities, including sales and use taxes. Revenue for construction materials is recognized at a point in time when delivery of the products has taken place. Contracting revenue is recognized over time using an input method based on the cost-to-cost measure of progress on a project.
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    Index
    Disaggregation
    In the following tables, revenue is disaggregated by category for each segment and includes sales of materials to both third parties and internal customers. Due to consolidation requirements, the internal sales revenues must be eliminated against the construction materials product used in downstream materials and contracting services to arrive at the external operating revenues. We believe this level of disaggregation best depicts how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors. For more information on the Company’s reportable segments, see Note 15.
    Three Months Ended March 31, 2025WestMountainCentralEnergy ServicesCorporate Services and EliminationsTotal
    (In thousands)
    Aggregates$56,257 $8,043 $17,092 $— $— $81,392 
    Ready-mix concrete69,780 13,087 25,591 — — 108,458 
    Asphalt8,866 498 6,770 — — 16,134 
    Liquid asphalt
    — — — 12,228 — 12,228 
    Other34,406 3 2,418 2,995 3,669 43,491 
    Contracting services public-sector38,772 36,179 24,276 — — 99,227 
    Contracting services private-sector28,836 11,829 172 — — 40,837 
    Internal sales(28,899)(3,645)(8,478)(3,678)(3,596)(48,296)
    Revenues from contracts with customers
    $208,018 $65,994 $67,841 $11,545 $73 $353,471 
    Three Months Ended March 31, 2024WestMountainCentralEnergy ServicesCorporate Services and EliminationsTotal
    (In thousands)
    Aggregates$58,947 $9,455 $15,871 $— $— $84,273 
    Ready-mix concrete62,996 13,835 23,024 — — 99,855 
    Asphalt10,584 830 5,059 — — 16,473 
    Liquid asphalt
    — — — 11,035 — 11,035 
    Other28,904 5 1,898 3,062 5,142 39,011 
    Contracting services public-sector41,519 25,859 21,033 — — 88,411 
    Contracting services private-sector23,105 13,803 176 — — 37,084 
    Internal sales(28,516)(3,962)(6,097)(2,981)(4,996)(46,552)
    Revenues from contracts with customers
    $197,539 $59,825 $60,964 $11,116 $146 $329,590 
    Note 9 - Uncompleted contracts
    The timing of revenue recognition may differ from the timing of invoicing to customers. The timing of invoicing to customers does not necessarily correlate with the timing of revenues being recognized under the cost-to-cost method of accounting. Contracts from contracting services are billed as work progresses in accordance with agreed upon contractual terms. Generally, billing to the customer occurs contemporaneous to revenue recognition. A variance in timing of the billings may result in a contract asset or a contract liability. A contract asset occurs when revenues are recognized under the cost-to-cost measure of progress, which exceeds amounts billed on uncompleted contracts. Such amounts will be billed as standard contract terms allow, usually based on various measures of performance or achievement. A contract liability occurs when there are billings in excess of revenues recognized under the cost-to-cost measure of progress on uncompleted contracts. Contract liabilities decrease as revenue is recognized from the satisfaction of the related performance obligation.
    The changes in contract assets and liabilities were as follows:
    March 31, 2025December 31, 2024ChangeLocation on Consolidated Balance Sheets
    (In thousands)
    Contract assets
    $28,505 $31,283 $(2,778)Costs and estimated earnings in excess of billings on uncompleted contracts
    Contract liabilities(42,016)(42,126)110 Billings in excess of costs and estimated earnings on uncompleted contracts
    Net contract liabilities
    $(13,511)$(10,843)$(2,668)
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    March 31, 2024December 31, 2023ChangeLocation on Consolidated Balance Sheets
    (In thousands)
    Contract assets
    $33,559 $27,293 $6,266 Costs and estimated earnings in excess of billings on uncompleted contracts
    Contract liabilities(50,844)(51,376)532 Billings in excess of costs and estimated earnings on uncompleted contracts
    Net contract liabilities
    $(17,285)$(24,083)$6,798 
    We recognized $28.2 million in revenue for the three months ended March 31, 2025, which was previously included in contract liabilities at December 31, 2024. We recognized $30.5 million in revenue for the three months ended March 31, 2024, which was previously included in contract liabilities at December 31, 2023.
    We recognized a net increase in revenues of $8.0 million and $9.2 million for the three months ended March 31, 2025 and 2024, respectively, from performance obligations satisfied in prior periods.
    Remaining performance obligations
    The remaining performance obligations, also referred to as backlog, include unrecognized revenues that we reasonably expect to be realized. These unrecognized revenues can include: projects that have a written award, a letter of intent, a notice to proceed, an agreed upon work order to perform work on mutually accepted terms and conditions, and change orders or claims to the extent management believes additional contract revenues will be earned and are deemed probable of collection. The majority of our contracts for contracting services have an original duration of less than one year.
    At March 31, 2025, our remaining performance obligations were $938.7 million. We expect to recognize the following revenue amounts in future periods related to these remaining performance obligations: $820.6 million within the next 12 months or less; $91.5 million within the next 13 to 24 months; and $26.6 million in 25 months or more.
    Note 10 - Acquisitions and Dispositions
    Acquisitions
    The following acquisitions were accounted for as business combinations in accordance with ASC 805 - Business Combinations. The results of the business combinations have been included in the Company's Consolidated Financial Statements beginning on the acquisition dates. Pro forma financial amounts reflecting the effects of the business combinations are not presented, as none of these business combinations, individually or in the aggregate, were material to our financial position or results of operations.
    Acquisitions are also subject to customary adjustments based on, among other things, the amount of cash, debt and working capital in the business as of the closing date. The amounts included in the Consolidated Balance Sheets for these adjustments are considered provisional until final settlement has occurred.
    Strata Corporation
    On March 7, 2025, we completed the acquisition of Strata Corporation, a leading construction materials and contracting services provider in North Dakota and northwestern Minnesota. The purchase of Strata includes operations that expand our aggregates, ready-mix and asphalt operations, as well as our trucking fleet, locomotives and railcars, in our current geographic locations. The purchase price for Strata totaled $454.0 million and is subject to post-closing adjustments. The results of Strata are included in our Central segment.
    The estimated fair value of the assets acquired and liabilities assumed are preliminary, as we continue to gather information to finalize the valuation of these assets and liabilities. The fair values are considered provisional until final fair values are determined, or the measurement period has passed. We expect to record adjustments as we accumulate the information needed to estimate the fair value of assets acquired and liabilities assumed, including working capital balances, estimated fair value of identifiable intangible assets, property, plant and equipment, total consideration and goodwill. We utilized market and cost approaches to estimate the fair value of the property, plant and equipment, excluding aggregate reserves. The fair value of aggregate reserves and intangible assets were determined using the income approach. All estimates, key assumptions, and forecasts were either provided by or reviewed by management. We engaged third-party valuation firms to assist in the analysis and valuation of the assets of Strata. While we chose to utilize third-party valuation firms, the fair value analysis and related valuations represent the conclusions of management and not the conclusions or statements of any third party.
    The excess of the total purchase price over the fair value of assets acquired and liabilities assumed was allocated to goodwill. We believe that the goodwill relates to several factors, including potential synergies related to market opportunities for multiple product offerings and economies of scale expected from combining our operations with the business acquired.
    The final fair value of the net assets acquired may result in adjustments to the assets and liabilities, including goodwill, and will be made as soon as practical, but no later than one year from the respective acquisition dates. However, any subsequent measurement period adjustments are not expected to have a material impact on our results of operations.
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    The preliminary allocation of the purchase price for Strata is as follows:
    As of March 31, 2025
    (In thousands)
    Assets
    Current assets:
    Cash and cash equivalents
    $7,906 
    Receivables
    8,374 
    Costs and estimated earnings in excess of billings on uncompleted contracts
    4,390 
    Inventories
    36,355 
    Assets held for sale
    21,093 
    Prepayments and other current assets
    4,850 
    Total current assets
    82,968 
    Noncurrent assets:
    Property, plant and equipment
    266,370 
    Goodwill
    152,329 
    Other intangible assets
    13,600 
    Operating lease right-of-use assets53 
    Total noncurrent assets
    432,352 
    Total assets acquired
    $515,320 
    Liabilities
    Current liabilities:
    Accounts payable
    $3,312 
    Billings in excess of costs and estimated earnings on uncompleted contracts
    921 
    Current operating lease liabilities29 
    Other accrued liabilities
    21,378 
    Total current liabilities25,640 
    Noncurrent liabilities:
    Deferred income taxes45,092 
    Noncurrent operating lease liabilities
    3,293 
    Total noncurrent liabilities
    48,385 
    Total liabilities assumed
    74,025 
    Total consideration (fair value)
    $441,295 
    Intangible assets for Strata include $9.5 million for customer backlog, which has an amortization period of 10 months, and $4.1 million for permits, which has an amortization period of 10 years upon commencement of operations.
    Other
    During the first quarter of 2025, we completed the acquisition of an aggregate quarry operation in Washington for $10.1 million, which will supply aggregates to Southern Washington and Northern Oregon. The acquisition resulted in the recognition of $15.1 million of assets in property, plant and equipment, $1.3 million deferred income tax liability and $202,000 in noncurrent liabilities - other. We have reviewed the fair values of the assets and liabilities and determined that the purchase would result in a gain being recognized at the time of the acquisition. We believe the bargain purchase gain was primarily the result of the sellers’ desire to exit quickly due to cash flow constraints which were limiting their ability to operate the business efficiently. The gain on the purchase was $3.5 million, net of deferred taxes of $1.3 million, and was recorded in other income on the Consolidated Statement of Operations. The results of this acquisition are included in our West segment.

    During 2024, we completed four acquisitions with an aggregated purchase price of $120.7 million, subject to future post-closing adjustments. As of March 31, 2025, the purchase accounting for Albina Asphalt is considered preliminary and will be completed in the second quarter of 2025.
    For the three months ended March 31, 2025, we incurred acquisition-related costs on completed and other potential acquisitions of $5.3 million. These costs are included in our Corporate Services in selling, general and administrative expenses on the Consolidated Statement of Operations.
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    Index
    Dispositions
    On March 7, 2025, we sold four ready-mix plant operations for total proceeds of $14.5 million. The ready-mix plant operations were acquired by us as part of the Strata acquisition and subsequently sold to a third-party. The ready-mix plants were included in assets held for sale on the opening balance sheet for Strata at the time of the acquisition.
    Note 11 - Goodwill and other intangible assets
    The changes in the carrying amount of goodwill were as follows:
    Balance at January 1, 2025Goodwill Acquired During the YearMeasurement Period AdjustmentsReallocation of GoodwillBalance at March 31, 2025
     (In thousands)
    West$123,674 $— $— $— $123,674 
    Mountain26,816 — — — 26,816 
    Central115,322 152,329 — — 267,651 
    Energy Services31,413 — — — 31,413 
    Total$297,225 $152,329 $— $— $449,554 
    Balance at January 1, 2024Goodwill Acquired During the YearMeasurement Period AdjustmentsReallocation of GoodwillBalance at March 31, 2024
     (In thousands)
    West$123,599 $— $— $— $123,599 
    Mountain26,816 — — — 26,816 
    Central114,587 — — — 114,587 
    Energy Services9,476 — — — 9,476 
    Total$274,478 $— $— $— $274,478 
    Balance at January 1, 2024Goodwill Acquired During the YearMeasurement Period AdjustmentsReallocation of GoodwillBalance at December 31, 2024
     (In thousands)
    West$123,599 $75 $— $— $123,674 
    Mountain26,816 — — — 26,816 
    Central114,587 735 — — 115,322 
    Energy Services9,476 21,937 — — 31,413 
    Total$274,478 $22,747 $— $— $297,225 
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    Other amortizable intangible assets were as follows:
     March 31, 2025March 31, 2024December 31, 2024
     (In thousands)
    Customer relationships$30,703 $18,540 $30,703 
    Less accumulated amortization11,798 9,535 11,060 
     18,905 9,005 19,643 
    Noncompete agreements3,107 3,820 3,950 
    Less accumulated amortization2,743 3,315 3,524 
    364 505 426 
    Tradename
    7,470 — 7,470 
    Less accumulated amortization188 — 124 
    7,282 — 7,346 
    Backlog
    9,890 — 390 
    Less accumulated amortization
    32 — 22 
    9,858 — 368 
    Other6,688 1,796 3,310 
    Less accumulated amortization1,130 1,029 1,679 
     5,558 767 1,631 
    Total$41,967 $10,277 $29,414 
    The previous tables include goodwill and intangible assets associated with the business combinations completed in the first quarter of 2025. For more information related to these business combinations, see Note 10.
    Amortization expense for amortizable intangible assets for the three months ended March 31, 2025, and 2024 was $1.1 million and $545,000, respectively. Estimated amortization expense for identifiable intangible assets as of March 31, 2025, was:
    Remainder of 20252026202720282029Thereafter
    (In thousands)
    Amortization expense$12,034 $5,307 $4,287 $3,961 $3,466 $12,912 
    Note 12 - Fair value measurements
    Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants at the measurement date. The fair value guidance establishes a hierarchy for grouping assets and liabilities, based on the significance of inputs. The estimated fair values of the assets and liabilities measured on a recurring basis are determined using the market approach.
    Financial instruments measured at fair value on a recurring basis
    We measure our investments in certain fixed-income and equity securities at fair value with changes in fair value recognized in income. We anticipate using these investments, which consist of insurance contracts, to satisfy our obligations under our unfunded, nonqualified defined benefit and defined contribution plans for our executive officers and certain key management employees, and invest in these fixed-income and equity securities for the purpose of earning investment returns and capital appreciation. These investments, which totaled $30.5 million, $27.1 million and $28.4 million at March 31, 2025 and 2024, and December 31, 2024, respectively, are classified as investments on the Consolidated Balance Sheets. These investments had a net unrealized loss of $692,000 and a net unrealized gain of $1.2 million for the three months ended March 31, 2025 and 2024, respectively. The change in fair value, which is considered part of the cost of the plan, is classified in other income on the Consolidated Statements of Operations.
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    The Company's assets measured at fair value on a recurring basis were as follows:
     Fair Value Measurements at March 31, 2025, Using 
     Quoted Prices in
    Active Markets
    for Identical
    Assets
    (Level 1)
    Significant
    Other
    Observable
    Inputs
    (Level 2)
    Significant
    Unobservable
    Inputs
    (Level 3)
    Balance at March 31, 2025
    (In thousands)
    Assets:    
    Money market funds$— $4,125 $— $4,125 
    Insurance contracts
    — 30,451 — 30,451 
    Total assets measured at fair value$— $34,576 $— $34,576 
     Fair Value Measurements at March 31, 2024, Using 
     Quoted Prices in
    Active Markets
    for Identical
    Assets
    (Level 1)
    Significant
    Other
    Observable
    Inputs
    (Level 2)
    Significant
    Unobservable
    Inputs
    (Level 3)
    Balance at March 31, 2024
    (In thousands)
    Assets:    
    Money market funds$— $3,845 $— $3,845 
    Insurance contracts
    — 27,059 — 27,059 
    Total assets measured at fair value$— $30,904 $— $30,904 
     Fair Value Measurements at December 31, 2024, Using 
    Quoted Prices in
    Active Markets
    for Identical
    Assets
     (Level 1)
    Significant
    Other
    Observable
    Inputs
    (Level 2)
    Significant
    Unobservable
    Inputs
     (Level 3)
    Balance at December 31, 2024
    (In thousands)
    Assets:    
    Money market funds$— $4,082 $— $4,082 
    Insurance contracts
    — 28,377 — 28,377 
    Total assets measured at fair value$— $32,459 $— $32,459 
    Our Level 2 money market funds are valued at the net asset value of shares held at the end of the period, based on published market quotations on active markets, or using other known sources including pricing from outside sources. The estimated fair value of the Level 2 insurance contracts is based on contractual cash surrender values that are determined primarily by investments in managed separate accounts of the insurer. These amounts approximate fair value. The managed separate accounts are valued based on other observable inputs or corroborated market data.
    Though we believe the methods used to estimate fair value are consistent with those used by other market participants, the use of other methods or assumptions could result in a different estimate of fair value.
    Nonfinancial instruments measured at fair value on a nonrecurring basis
    We apply the provisions of the fair value measurement standard to our nonrecurring, non-financial measurements, including long-lived asset impairments. These assets are not measured at fair value on an ongoing basis but are subject to fair value adjustments only in certain circumstances. We review the carrying value of our long-lived assets, excluding goodwill, whenever events or changes in circumstances indicate that such carrying amounts may not be recoverable.
    The assets and liabilities of the acquisitions that occurred during the first quarter of 2025 were calculated using a market or cost approach. The fair value of some of the assets was determined based on Level 3 inputs including estimated future cash flows, discount rates, growth rates and sales projections, all of which require significant management judgment. For more information on these Level 2 and 3 fair value measurements, see Note 10.
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    Our long-term debt is not measured at fair value on the Consolidated Balance Sheets and the fair value is being provided for disclosure purposes only. The fair value was categorized as Level 2 in the fair value hierarchy and was based on discounted cash flows using current market interest rates. The estimated fair value of our Level 2 long-term debt was as follows:
     March 31, 2025March 31, 2024December 31, 2024
     (In thousands)
    Carrying amount$1,189,931 $695,247 $689,950 
    Fair value$1,208,611 $715,962 $707,853 
    The carrying amounts of our remaining financial instruments included in current assets and current liabilities approximate their fair values.
    Note 13 - Debt
    Certain debt instruments of ours contain restrictive covenants and cross-default provisions. In order to borrow under the debt agreements, we must be in compliance with the applicable covenants and certain other conditions, all of which management believes we, as applicable, were in compliance with at March 31, 2025. In the event we do not comply with the applicable covenants and other conditions, alternative sources of funding may need to be pursued.

    On March 7, 2025, we entered into an amendment to the senior secured credit agreement to, among other things, increase our revolving credit facility from $350.0 million to $500.0 million and extend the maturity to March 7, 2030, refinance the existing $275.0 million Term Loan A to extend the maturity to March 7, 2030, and provide for a new Term Loan B in an aggregate principal amount of $500.0 million with a maturity of March 8, 2032. The Term Loan B was funded on March 7, 2025. Each facility has a SOFR-based interest rate. The Term Loan A has a mandatory annual amortization of 2.50 percent for years one and two, 5.00 percent for years three and four, and 7.50 percent in the fifth year. The Term Loan B has a mandatory annual amortization of $5.0 million. The agreement contains customary covenants and provisions, including a covenant of Knife River not to permit, at any time, the ratio of total debt to trailing twelve month earnings before interest, taxes, depreciation, depletion and amortization (EBITDA) to be greater than 4.75 to 1.00. The covenants also include restrictions on the sale of certain assets, loans and investments.
    Long-term Debt Outstanding Long-term debt outstanding was as follows:
     
    Weighted
    Average
    Interest
    Rate at
    March 31, 2025
    March 31, 2025March 31, 2024December 31, 2024
     (In thousands)
    Term loan A agreement due on March 7, 2030
    6.05 %$264,688 $269,844 $264,688 
    Term loan B agreement due on March 8, 2032
    6.29 %500,000 — — 
    Senior notes due on May 1, 2031
    7.75 %425,000 425,000 425,000 
    Other notes due on January 1, 2061
    — %243 403 262 
    Less unamortized debt issuance costs17,766 14,636 12,564 
    Total long-term debt1,172,165 680,611 677,386 
    Less current maturities11,780 7,072 10,475 
    Net long-term debt$1,160,385 $673,539 $666,911 
    Schedule of Debt Maturities Long-term debt maturities, which excludes unamortized debt issuance costs, at March 31, 2025, were as follows:
    Remainder of
    2025
    2026202720282029Thereafter
    (In thousands)
    Long-term debt maturities$8,875 $11,698 $16,580 $18,235 $23,197 $1,111,346 
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    Note 14 - Cash flow information
    Cash expenditures for interest and income taxes were as follows:
    Three Months Ended
     March 31,
     20252024 
     (In thousands)
    Interest paid, net
    $4,731 $5,764 
    Income taxes paid, net$2,883 $— 
    Noncash investing and financing transactions were as follows:
    Three Months Ended
    March 31,
    20252024 
    (In thousands)
    Right-of-use assets obtained in exchange for new operating lease liabilities
    $1,179 $4,802 
    Property, plant and equipment additions in accounts payable$5,023 $6,046 
    Note 15 - Business segment data
    In January 2025, we made a change to our organizational structure to better align with our business strategy. We reorganized our business segments to reflect changes in the way our chief operating decision maker evaluates performance, makes operating decisions and allocates resources. Our former Pacific and Northwest operating segments were combined to form the new West operating segment. Our former North Central and South operating segments were combined to form the new Central operating segment. The reorganization resulted in four operating segments: West, Mountain, Central and Energy Services, each of which is also a reportable segment. Each segment’s performance is evaluated based on segment results without allocating corporate expenses, which include corporate costs associated with accounting, legal, treasury, business development, information technology, human resources, and other corporate expenses that support the operating segments.
    Three of our reportable segments are aligned by key geographic areas due to the production of construction materials and related contracting services and one is based on product line. Each segment is led by a segment manager who reports to the Company’s chief operating officer, who is also the Company's chief operating decision maker, along with the chief executive officer. Our chief operating decision maker uses EBITDA to evaluate the performance of the segments, perform analytical comparisons to budget and uses historical and projected EBITDA to allocate resources, including capital allocations.
    Each geographic segment offers a vertically integrated suite of products and services, including aggregates, ready-mix concrete, asphalt and contracting services, while the Energy Services segment produces and supplies liquid asphalt, primarily for use in asphalt road construction, and is a supplier to some of the other segments. Each geographic segment mines, processes and sells construction aggregates (crushed stone and sand and gravel); produces and sells asphalt; and produces and sells ready-mix concrete as well as vertically integrating its contracting services to support the aggregate-based product lines including heavy-civil construction, asphalt and concrete paving, and site development and grading. Although not common to all locations, the geographic segments also sell cement, merchandise and other building materials and related services.
    Corporate Services represents the unallocated costs of certain corporate functions, such as accounting, legal, treasury, business development, information technology, human resources and other corporate expenses that support the operating segments. Corporate Services also includes an immaterial amount of external revenue from the Knife River Training Center. We account for intersegment sales and transfers as if the sales or transfers were to third parties. The accounting policies applicable to each segment are consistent with those used in the audited consolidated financial statements.
    The proceeding information follows the same accounting policies as described in the audited financial statements and notes included in the Company's 2024 Annual Report. Prior periods presented have been recast to conform to the current reportable segment presentation.
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    Three Months Ended March 31, 2025Three Months Ended March 31, 2024
    WestMountainCentralEnergy ServicesTotalWestMountainCentralEnergy ServicesTotal
    (In thousands)
    Revenues from external customers$208,018 $65,994 $67,841 $11,545 $353,398 $197,539 $59,825 $60,964 $11,116 $329,444 
    Intersegment revenues28,899 3,645 8,478 3,678 44,700 28,516 3,962 6,097 2,981 41,556 
    Total segment revenue236,917 69,639 76,319 15,223 398,098 226,055 63,787 67,061 14,097 371,000 
    Other revenues1
    3,669 5,142 
    Less: Elimination of intersegment revenue48,296 46,552 
    Total consolidated revenue$353,471 $329,590 
    Cost of revenue excluding depreciation, depletion and amortization193,638 76,600 82,120 18,897 186,788 61,287 71,636 14,204 
    Selling, general and administrative expenses excluding depreciation, depletion and amortization21,646 9,299 18,470 4,099 19,730 8,607 14,225 2,420 
    Other segment items2
    3,281 (7)(21)(29)(126)43 78 44 
    Total segment EBITDA$24,914 $(16,267)$(24,292)$(7,802)$(23,447)$19,411 $(6,064)$(18,722)$(2,483)$(7,858)
    Consolidated loss before income taxes
    (93,349)(63,955)
    Plus:
    Depreciation, depletion and amortization38,762 32,212 
    Interest expense, net3
    13,123 11,147 
    Less unallocated amounts:
    Other corporate revenue73 146 
    Other corporate expenses(18,090)(12,884)
    Total segment EBITDA$(23,447)$(7,858)
    Capital expenditures
    $26,921 $13,929 $25,893 $1,617 $68,360 $18,581 $8,498 $6,582 $2,394 $36,055 
    Assets$1,265,438 $350,259 $1,138,931 $285,681 $3,040,309 $1,202,549 $309,451 $603,182 $160,892 $2,276,074 
    Other assets4,778,400 3,971,565 
    Elimination of intercompany receivables and investment in subsidiaries4,538,002 3,733,996 
    Total consolidated assets$3,280,707 $2,513,643 
    1    Other revenues is comprised of revenue included within our corporate services.
    2    Other segment items is comprised of other income (expense) items on the income statement.
    3    Interest expense, net is interest expense net of interest income.
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    Note 16 - Commitments and contingencies
    We are party to claims and lawsuits arising out of our business and that of our consolidated subsidiaries, which may include, but are not limited to, matters involving property damage, personal injury, and environmental, contractual and statutory obligations. We accrue a liability for those contingencies when the incurrence of a loss is probable and the amount can be reasonably estimated. If a range of amounts can be reasonably estimated and no amount within the range is a better estimate than any other amount, then the minimum of the range is accrued. We do not accrue liabilities when the likelihood that the liability has been incurred is probable but the amount cannot be reasonably estimated or when the liability is believed to be only reasonably possible or remote. For contingencies where an unfavorable outcome is probable or reasonably possible and which are material, we disclose the nature of the contingency and, in some circumstances, an estimate of the possible loss. Accruals are based on the best information available, but in certain situations management is unable to estimate an amount or range of a reasonably possible loss including, but not limited to when: (1) the damages are unsubstantiated or indeterminate, (2) the proceedings are in the early stages, (3) numerous parties are involved, or (4) the matter involves novel or unsettled legal theories.
    At March 31, 2025 and 2024, and December 31, 2024, we accrued contingent liabilities as a result of litigation, which have not been discounted, of $3.4 million, $1.2 million and $6.6 million, respectively. At March 31, 2025 and 2024, and December 31, 2024, we also recorded corresponding insurance receivables of $0, $400,000 and $459,000, respectively, related to the accrued liabilities. Most of these claims and lawsuits are covered by insurance, thus our exposure is typically limited to our deductible amount. Management will continue to monitor each matter and adjust accruals as might be warranted based on new information and further developments. Management believes that the outcomes with respect to probable and reasonably possible losses in excess of the amounts accrued, net of insurance recoveries, while uncertain, either cannot be estimated or will not have a material effect upon the Company's financial position, results of operations or cash flows. Unless otherwise required by GAAP, legal costs are expensed as they are incurred.
    Environmental matters
    Knife River Corporation - Northwest is a party to claims for the cleanup of a superfund site in Portland, Oregon. There were no material changes to the environmental matters that were previously reported in the audited financial statements and notes included in our 2024 Annual Report.
    Guarantees
    We have outstanding obligations to third parties where we have guaranteed our performance. These guarantees are related to contracts for contracting services and certain other guarantees. At March 31, 2025, the fixed maximum amounts guaranteed under these agreements aggregated to $11.5 million, all of which have no scheduled maturity date. Certain of the guarantees also have no fixed maximum amounts specified. There were no amounts outstanding under the previously mentioned guarantees at March 31, 2025.
    We have outstanding letters of credit to third parties related to insurance policies and other agreements. At March 31, 2025, the fixed maximum amounts guaranteed under these letters of credit aggregated $23.3 million. At March 31, 2025, the amounts of scheduled expiration of the maximum amounts guaranteed under these letters of credit aggregate to $11.8 million in 2025, $11.2 million in 2026, $104,000 in 2027 and $175,000 in 2028. There were no amounts outstanding under the previously mentioned letters of credit at March 31, 2025.
    In the normal course of business, we have surety bonds related to contracts for contracting services, reclamation obligations and insurance policies of its subsidiaries. In the event a subsidiary of Knife River does not fulfill a bonded obligation, we would be responsible to the surety bond company for completion of the bonded contract or obligation. A large portion of the surety bonds are expected to expire within the next 12 months; however, we will likely continue to enter into surety bonds for our subsidiaries in the future. At March 31, 2025, approximately $744.7 million of surety bonds were outstanding, which were not reflected on the Consolidated Balance Sheet.
    Note 17 - Related-party transactions
    Transition services agreements
    On May 31, 2023, the separation of Knife River from MDU Resources Group, Inc. (MDU Resources) and its other businesses was completed and Knife River became an independent, publicly traded company (Separation) listed on the New York Stock Exchange under the symbol "KNF". As part of the Separation, MDU Resources provided transition services to us and we provided transition services to MDU Resources in accordance with the Transition Services Agreement entered into on May 30, 2023. We paid $816,000 for the three months ended March 31, 2024, related to these activities, which were reflected in selling, general and administrative expenses on the Consolidated Statements of Operations. We received $76,000 for the three months ended March 31, 2024, related to these activities, which were reflected in other income on the Consolidated Statements of Operations. The majority of the transition services were completed over a period of one year after the Separation and, as of December 31, 2024, no further obligation for services exists for either party.

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    Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations
    Forward-Looking Statements
    This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended ("Exchange Act"). Forward-looking statements are all statements other than statements of historical fact, including without limitation those statements that are identified by the words "anticipates," "estimates," "expects," "intends," "plans," "predicts" and similar expressions, and include statements concerning plans, projections, objectives, goals, strategies, future events or performance, and underlying assumptions (many of which are based, in turn, upon further assumptions) and other statements that are other than statements of historical facts. From time to time, Knife River Corporation ("Knife River," the "Company," "we," "our," or "us") may publish or otherwise make available forward-looking statements of this nature, including statements related to its Competitive EDGE strategy (EDGE) implemented to improve margins and to execute on other strategic initiatives aimed at generating long-term profitable growth, shareholder value creation, expected long-term goals, backlog margin and acquisitions or financing plans.
    Forward-looking statements involve risks and uncertainties, which could cause actual results or outcomes to differ materially from those expressed. Our expectations, beliefs and projections are expressed in good faith and are believed to have a reasonable basis, including without limitation, management's examination of historical operating trends, data contained in our records and other data available from third parties. Nonetheless, our expectations, beliefs or projections may not be achieved or accomplished and changes in such assumptions and factors could cause actual future results to differ materially.
    Any forward-looking statement contained in this document speaks only as of the date on which the statement is made, and we undertake no obligation to update any forward-looking statement or statements to reflect events or circumstances that occur after the date on which the statement is made or to reflect the occurrence of unanticipated events, except as required by law. New factors emerge from time to time, and it is not possible for management to predict all the factors, nor can it assess the effect of each factor on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statement. All forward-looking statements, whether written or oral and whether made by or on behalf of our Company, are expressly qualified by the risk factors and cautionary statements reported in the section entitled "Item 1A. Risk Factors" in Part I of the Company's 2024 Annual Report on Form 10-K (Annual Report) and subsequent filings with the United States Securities and Exchange Commission (SEC).
    Company Overview
    At Knife River, we are a people-first construction materials and contracting services company. We provide construction materials and contracting services to build safe roads, bridges, airport runways and other critical infrastructure needs that connect people with where they want to go and with the supplies they need. We also champion a positive workplace culture by focusing on safety, training, inclusion, compensation and work-life balance.
    We are one of the leading providers of crushed stone and sand and gravel in the United States and operate through four operating segments, which are also our reportable segments, across 14 states: West, Mountain, Central, and Energy Services. The geographic segments primarily provide aggregates, asphalt and ready-mix concrete, as well as related contracting services such as heavy-civil construction, asphalt paving, concrete construction, site development and grading. The Energy Services segment produces and supplies liquid asphalt and related services, primarily for use in asphalt road construction.
    As an aggregates-led construction materials and contracting services provider in the United States, our 1.2 billion tons of aggregate reserves, as of December 31, 2024, provide the foundation for a vertically integrated business strategy, with approximately 37 percent of our aggregates being used internally to support value-added downstream products (ready-mix concrete and asphalt) and contracting services (heavy-civil construction, laydown, asphalt paving, concrete construction, site development and grading services, bridges and in some segments the manufacturing of prestressed concrete products). Our aggregate sites and associated asphalt and ready-mix plants are primarily in strategic locations near mid-sized, high-growth markets, providing us with a transportation advantage for our materials that supports competitive pricing and increased margins. We provide our products and services to both public and private markets, with public markets being the majority of our work and tending to be more stable across economic cycles, which helps offset the cyclical nature of the private markets.
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    We provide various products and services and operate a variety of facility types, including aggregate quarries and mines, ready-mix concrete plants, asphalt plants and distribution facilities, in the following states:
    •West: Alaska, California, Hawaii, Oregon, and Washington
    •Mountain: Idaho, Montana and Wyoming
    •Central: Iowa, Minnesota, North Dakota, South Dakota and Texas
    •Energy Services: California, Iowa, Nebraska, Oregon, South Dakota, Texas, Washington and Wyoming
    The following table presents a summary of products and services provided, as well as modes of transporting those products:
    Products and ServicesModes of Transportation
    Precast/
    Ready-MixConstructionPrestressedLiquidHeavy
    AggregatesAsphaltConcreteServicesConcreteAsphaltCementEquipmentTruckingRailBarge
    WestXXXXXXXXXX
    MountainXXXXXX
    CentralXXXXXXXX
    Energy ServicesXXX
    Basis of Presentation
    In January 2025, we made a change to our organizational structure to better align with our business strategy. We reorganized our business segments to reflect changes in the way our chief operating decision maker evaluates performance, makes operating decisions and allocates resources. Our former Pacific and Northwest operating segments were combined to form the new West operating segment. Our former North Central and South operating segments were combined to form the new Central operating segment. The reorganization resulted in four operating segments: West, Mountain, Central and Energy Services, each of which is also a reportable segment. Each segment’s performance is evaluated based on segment results without allocating corporate expenses, which include corporate costs associated with accounting, legal, treasury, business development, information technology, human resources, and other corporate expenses that support the operating segments. Prior periods have been recast to conform to the current reportable segment presentation.
    Market Conditions and Outlook
    Our markets remain resilient and construction activity remains generally strong. Approximately 80 percent of our contracting services revenue each year comes from public-sector projects, enhancing stability through market cycles. For more information on factors that may negatively impact our business, see the section entitled "Item 1A. Risk Factors" in Part I of the Company's 2024 Annual Report.
    Backlog. Our contracting services backlog was as follows:
    March 31, 2025March 31, 2024December 31, 2024
    (In millions)
    West$242.1 $297.1 $230.2 
    Mountain418.3 383.2 339.9 
    Central278.3 279.2 175.5 
    $938.7 $959.5 $745.6 
    Expected margins on backlog at March 31, 2025, were comparable to the expected margins on backlog at March 31, 2024. Of the $938.7 million of backlog at March 31, 2025, we expect to complete approximately $820.6 million in the 12 months following March 31, 2025. Approximately 87 percent of our backlog at March 31, 2025, relates to publicly funded projects, including street and highway construction projects, which are driven primarily by public works projects for state departments of transportation (DOT). Further, there continues to be infrastructure development, as discussed in the following section on Public Funding, which is expected to continue to provide bidding opportunities in our markets. We anticipate that full-year 2025 contracting service margins will be similar to 2024.
    Period-over-period increases or decreases in backlog may not be indicative of future revenues, margins, net income or earnings before interest, taxes, depreciation, depletion and amortization (EBITDA). See the section entitled “Item 1A. Risk Factors” in Part I of the Company's 2024 Annual Report for a list of factors that can cause revenues to be realized in periods and at levels that are different from originally projected.
    Public Funding. Funding for public projects is dependent on federal and state funding, such as appropriations to the Federal Highway Administration. During the quarter, the American Society of Civil Engineers published its 2025 Report Card for America's
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    Infrastructure, assigning the United States roads a "D+" grade and estimating that between 2024 and 2033, the country will require more funding than what is currently authorized. It is estimated that a total of $2.2 trillion in funding will be needed for our roadway systems to reach a state of good repair.
    Currently, states have continued moving forward with allocating funds from federal programs, such as the Infrastructure Investment and Jobs Act (IIJA), which is authorized to provide $1.2 trillion in funding from 2022 through 2026. As of January 2025, over 60 percent of IIJA formula funding had yet to be spent in our 14 state operating market. Additionally, DOT budgets in most of the states where we operate remain strong, which favorably affects bidding through the remainder of the year. During the early part of second quarter 2025, Washington, Idaho and North Dakota have all passed bills that support their transportation funding. We continue to monitor the implementation and impact of these legislative items.
    Profitability. Our management team continually monitors our margins and has been proactive in applying strategies to increase margins to support our long-term profitability goals and to create shareholder value. In 2023, we began implementing EDGE initiatives and established teams to deliver training, assist with targeting higher-margin bidding opportunities across the regions and pursue growth opportunities, as well as identifying ways to increase efficiencies and reduce costs. Since inception, the Materials Process Improvement Team (Materials PIT Crew) has traveled to 22 locations throughout our operational footprint, visiting 135 individual aggregate, asphalt and ready-mix concrete plants. In 2024, we created the position of Chief Excellence Officer. This newly formed position became effective January 1, 2025, and focuses on expanding our PIT Crews and leading our standardization efforts. Under the leadership of the Chief Excellence Officer, a broader process improvement framework was established, creating more teams focused on standardization, commercial excellence and operational excellence.
    Under the current tariff environment, we did not experience a material direct impact to the results of our financial operations in the first three months of 2025. We continue to closely monitor the effects and changes to these announcements, but currently do not have enough information to fully quantify the direct or indirect impact these tariffs will have once fully enacted.
    Growth. Our management team continues to evaluate growth opportunities, both through organic growth and acquisitions they believe will generate shareholder value. Our business development team is focused on our growth with materials-led businesses in mid-size, high growth markets, and has several targets at various stages of completion in our acquisition pipeline. In March 2025, we completed the acquisition of Strata Corporation, which is now included in our Central segment. As part of the acquisition, we added over 30 years of aggregate reserves for Strata's operations, which is based on Strata's historical sales volumes, 24 ready-mix plants and three asphalt plants, which complements our existing operations. In March 2025, we also completed the acquisition of an aggregate quarry operation in Washington, which will supply aggregates to Southern Washington and Northern Oregon.
    In addition, we are investing in multiple organic projects, including an aggregates expansion project in South Dakota that will increase our production capabilities in the Sioux Falls market. This project is scheduled to be operational in 2027. We have also completed construction of a processing plant to manufacture polymer modified asphalt (PMA) and add liquid asphalt storage in our South Dakota operations, which will allow us to more cost effectively supply this local market. In Twin Falls, Idaho, we are greenfielding new ready-mix operations which will provide us with a fixed base to work from and allow us to build a local team in this high-growth market.
    Seasonality. We typically experience seasonal losses in the first quarter due to a large portion of our markets being geographically located in the northern part of the country. Generally, construction activity increases in the second quarter and continues throughout the year, contributing to both materials and contracting services volumes. For this reason, we see more pre-production activity and site improvements in the first quarter as we prepare for the upcoming construction season, which provides a benefit to us for the remainder of the year as volumes and sales increase. Some of this pre-production work includes stripping and harvesting at our aggregate sites as well as repairing and mobilizing equipment.
    Workforce. As a people-first company, we continually take steps to address safety, recruitment and retention of our employees. Safety is a core value at Knife River. The fundamental tenants of our safety culture are that all injuries are preventable and that our team is committed to work safely every day. We continue to advance our culture of safety through engagement and empowering our team members to take action and make meaningful changes that improve their well-being and the well-being of others.
    We continue to deploy resources to attract, develop and retain qualified and diverse talent. As the United States faces shortages in the availability of individuals to fill careers in our industry, we have taken significant steps to showcase construction as a career of choice. In April 2025, we created the position Chief People Officer which oversees our team member relations, recruitment and retention and training and career development.
    We own and operate a state-of-the-art training facility, the Knife River Training Center, which is used corporatewide to enhance the skills of both our new and existing employees through classroom education and hands-on experience. One of the most popular courses at the Knife River Training Center is the commercial driver's license training, which is helping to address an industry-wide labor shortage. The Knife River Training Center also offers a variety of courses around leadership development for all Knife River employees.
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    We employ professional instructors as part of our Training and Development team, which is based out of the Knife River Training Center. This team has a long-standing tradition of offering quality training to both frontline and leadership-level employees. Training courses include: commercial driver’s license/new truck driver, experienced truck driver, new and experienced equipment operator, sales, leadership/facilitator development and construction industry engagement.
    Consolidated Overview
    Three Months Ended
    March 31,
     2025 2024 % Change
    (In millions)
    Revenue$353.5 $329.6 7 %
    Cost of revenue363.1 323.1 12 %
    Gross profit(9.6)6.5 (248)%
    Selling, general and administrative expenses73.1 60.2 21 %
    Operating loss(82.7)(53.7)(54)%
    Interest expense15.3 13.9 10 %
    Other income4.6 3.7 24 %
    Loss before income taxes(93.4)(63.9)(46)%
    Income tax benefit(24.7)(16.3)(52)%
    Net loss$(68.7)$(47.6)(44)%
    EBITDA*$(41.5)$(20.6)(101)%
    Adjusted EBITDA*$(38.0)$(17.7)(115)%
    *EBITDA and Adjusted EBITDA are non-GAAP financial measures. For more information and reconciliations to the nearest GAAP measures, see the section entitled "Non-GAAP Financial Measures."
    Revenue includes revenue from the sale of construction materials and contracting services. Revenue for construction materials is recognized at a point in time when delivery of the products has taken place. Contracting services revenue is recognized over time using an input method based on the cost-to-cost measure of progress on a project.
    Cost of revenue includes all material, labor and overhead costs incurred in the production process for our products and services. Cost of revenue also includes depreciation, depletion and amortization attributable to the assets used in the production process.
    Gross profit includes revenue less cost of revenue, as defined above, and is the difference between revenue and the cost of making a product or providing a service, before deducting selling, general and administrative expenses, income taxes and interest expense.
    Selling, general and administrative expenses include the costs for estimating, bidding and corporate development, as well as costs related to segment and corporate management and administrative functions. Selling expenses can vary depending on the volume of projects in process and the number of employees assigned to estimating and bidding activities. Other general and administrative expenses include outside services; information technology; depreciation and amortization; training, travel and entertainment; office supplies; allowance for expected credit losses; gains or losses on the sale of assets; and other miscellaneous expenses.
    Other income includes net periodic benefit costs for our benefit plan expenses, other than service costs; interest income; realized and unrealized gains and losses on investments for our nonqualified benefit plans; earnings or losses on joint venture arrangements; gain on bargain purchase; and other miscellaneous income or expenses, including expenses related to the transition services agreement with MDU Resources Group, Inc.
    Income tax (benefit) expense consists of corporate income taxes related to our net income (loss). Income taxes are presented at the corporate services level and not at the individual segments. The effective tax rate can be affected by many factors, including changes in tax laws, regulations or rates, new interpretations of existing laws or regulations and changes to our overall levels of income (loss) before income tax.
    The discussion that follows focuses on the key financial measures we use to evaluate the performance of our business, which include revenue, EBITDA and EBITDA margin. EBITDA and EBITDA margin are non-GAAP financial measures used to measure profitability by our management and chief operating decision maker. For more information and reconciliations to the nearest GAAP measures, see the section entitled "Non-GAAP Financial Measures."
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    The following tables summarize our operating results.
    Three Months Ended
    March 31,
    20252024
    Dollars
    Margin
    Dollars
    Margin
    (In millions)
    Revenues by segment:
    West$208.3$198.7
    Mountain66.059.8
    Central67.961.0
    Energy Services13.912.8
    Total segment revenues356.1332.3
    Corporate Services and Eliminations(2.6)(2.7)
    Consolidated revenues$353.5$329.6
    EBITDA (a):
    West$24.912.0%$19.49.8%
    Mountain(16.3)(24.6)%(6.1)(10.1)%
    Central(24.3)(35.8)%(18.7)(30.7)%
    Energy Services(7.8)(56.0)%(2.5)(19.4)%
    Total segment EBITDA (a)(23.5)(6.6)%(7.9)(2.4)%
    Corporate Services and Eliminations (b)
    (18.0)N.M.(12.7)N.M.
    Consolidated EBITDA (a)
    $(41.5)(11.7)%$(20.6)(6.2)%
    (a)EBITDA, total segment EBITDA, EBITDA margin and total segment EBITDA margin are non-GAAP financial measures. For more information and a reconciliation to the nearest GAAP measure, see the section entitled "Non-GAAP Financial Measures."
    (b)N.M. - not meaningful
    Three Months Ended
    March 31,
    2025 2024 
    Sales (thousands):
    Aggregates (tons)3,8674,255
    Ready-mix concrete (cubic yards)544530
    Asphalt (tons)199221
    Average selling price:*
    Aggregates (per ton)$21.05$19.80
    Ready-mix concrete (per cubic yard)$199.26$188.41
    Asphalt (per ton)$81.05$74.50
    *The average selling price includes freight and delivery and other revenues.
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    Index
    Three Months Ended
    March 31,
    20252024
    Dollars
    Margin
    Dollars
    Margin
    (In millions)
    Revenues by product line:
    Aggregates$81.4$84.3
    Ready-mix concrete108.599.8
    Asphalt16.116.5
    Liquid asphalt
    12.211.0
    Other*43.539.0
    Contracting services140.1125.5
    Internal sales(48.3)(46.5)
    Total revenues$353.5$329.6
    Gross profit by product line:
    Aggregates$(6.0)(7.4)%$4.85.7%
    Ready-mix concrete8.78.1%8.68.6%
    Asphalt(5.7)(35.4)%(5.6)(33.8)%
    Liquid asphalt
    (4.2)(34.3)%(.9)(8.6)%
    Other*(13.2)(30.3)%(12.6)(32.4)%
    Contracting services10.87.7%12.29.7%
    Total gross profit$(9.6)(2.7)%$6.52.0%
    *Other includes cement, merchandise, fabric and spreading, and other products and services that individually are not considered to be a core line of business.
    Three Months Ended March 31, 2025, Compared to Three Months Ended March 31, 2024
    Revenue
    Revenue increased $23.9 million, largely driven by additional contracting services activity resulting from more public agency-related construction work across our footprint. During the quarter, prices increased mid-single digits as a result of our pricing initiatives across our asphalt, aggregate and ready-mix product lines. Increased sales volumes for all product lines in the Central segment were more than offset by decreased aggregates and asphalt sales volumes in the West and Mountain segments.
    Gross profit and gross margin
    Gross profit decreased $16.1 million for the quarter. We saw an increase in costs in the aggregates product line due to the timing of pre-production costs in the quarter, identified PIT Crew improvements and lower production volumes. In addition, Energy Services saw a decrease in gross profit mostly due to the addition of seasonal costs to prepare for the upcoming paving season at Albina and higher repairs and maintenance costs. The Mountain segment had lower gross profit on contracting services due to more subcontract work performed in the quarter and the timing of when project incentives were earned, which was offset in part by higher gross profit in the West segment from favorable construction project execution in California. The West segment also had higher gross profit on cement due to strong market demand.
    Selling, general and administrative expenses
    Selling, general and administrative expenses increased $12.9 million for the first quarter. Our reportable segments had higher costs of $9.1 million, primarily due to additional overhead of $3.5 million from the acquisition of Strata in March of 2025 and Albina in November 2024, as well as increased labor-related costs partly due to additional employees.
    Corporate Services had higher selling, general and administrative costs of $3.8 million in the quarter, driven largely by higher due diligence and integration costs of $5.8 million related to corporate development and completed acquisitions, as well as higher labor-related costs for additional staff and stock-based compensation expense. Offsetting these increased costs was the absence of one-time Separation costs in 2024 of $1.7 million and lower health care costs due the absence of a higher dollar claim in 2024.
    Interest expense
    Interest expense increased $1.4 million due primarily to higher average debt balances with the issuance of a new Term Loan B in March of 2025.
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    Index
    Other income
    Other income improved $900,000, largely driven by a one-time gain of $3.5 million on the bargain purchase of an aggregates quarry operation in the West segment, offset in part by lower returns of $1.9 million on our nonqualified defined benefit plans and a decrease in interest income of $600,000.
    Income tax benefit
    Income tax benefit increased $8.4 million, corresponding with higher net loss before income taxes.
    Business Segment Financial and Operating Data
    A discussion of key financial data from our business segments follows. We provide segment-level information by revenue, EBITDA and EBITDA margin, as these are the measures of profitability used by our chief operating decision maker to assess operational results.
    In January 2025, we made a change to our organizational structure to better align with our business strategy. We reorganized our business segments to reflect changes in the way our chief operating decision maker evaluates performance, makes operating decisions and allocates resources. Our former Pacific and Northwest operating segments were combined to form the new West operating segment. Our former North Central and South operating segments were combined to form the new Central operating segment. The reorganization resulted in four operating segments: West, Mountain, Central and Energy Services, each of which is also a reportable segment. Each segment’s performance is evaluated based on segment results without allocating corporate expenses, which include corporate costs associated with accounting, legal, treasury, information technology, human resources, and other corporate expenses that support the operating segments. Prior periods presented have been recast to conform to the current reportable segment presentation.
    Results of Operations - West
    Three Months Ended
    March 31,
    2025 2024 % Change
    (In millions)
    Revenue$208.3$198.75%
    EBITDA$24.9$19.428%
    EBITDA margin12.0 %9.8 %
    Three Months Ended
    March 31,
    2025 2024 
    (In millions)
    Revenues:
    Aggregates$56.3$58.9
    Ready-mix concrete69.863.0
    Asphalt8.810.6
    Other*34.428.9
    Contracting services67.664.6
    Internal sales(28.6)(27.3)
    $208.3$198.7
    *Other includes cement, merchandise, transportation services and other products that individually are not considered to be a core line of business for the segment.
    Three Months Ended March 31, 2025, Compared to Three Months Ended March 31, 2024

    Revenue increased $9.6 million, largely the result of higher pricing across all product lines contributing $14.1 million in the quarter. We also experienced an increase in market demand in Hawaii, which contributed to an increase of $4.0 million in cement and ready-mix volumes and California saw strong third-party demand for ready-mix concrete driving volumes up by $3.3 million. Partially offsetting the increase were $11.3 million lower aggregate and $3.7 million lower ready-mix concrete sales volumes in Oregon due largely to overall lower market demand. Contracting services contributed nearly $3.0 million to the increase, mostly due to more available public-agency and commercial work in California, which was offset in part by less public-agency work and timing of projects in certain Oregon markets.
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    Index
    EBITDA improved $5.5 million and EBITDA margin improved 220 basis points in the quarter. The increase in EBITDA was due in part to additional gross profit of $6.0 million on cement, aggregates and ready-mix concrete in Hawaii driven by increased market demand and higher prices outpacing cost increases. Contracting services saw favorable construction project execution in California and southern Oregon. The segment also recognized a one-time gain of $3.5 million due to an acquisition in the quarter that was a bargain purchase, as discussed in Note 10. Partially offsetting the increase was reduced gross profit on aggregates and ready-mix concrete in Oregon due largely to overall lower market demand, as well as higher pre-production costs on aggregates.
    Results of Operations - Mountain
    Three Months Ended
    March 31,
    2025 2024 % Change
    (In millions)
    Revenue$66.0$59.810%
    EBITDA$(16.3)$(6.1)(168)%
    EBITDA margin(24.6)%(10.1)%
    Three Months Ended
    March 31,
    2025 2024 
    (In millions)
    Revenues:
    Aggregates$8.0$9.5
    Ready-mix concrete13.113.8
    Asphalt.5.8
    Contracting services48.039.7
    Internal sales(3.6)(4.0)
    $66.0$59.8
    Three Months Ended March 31, 2025, Compared to Three Months Ended March 31, 2024

    Revenue increased $6.2 million in the quarter, largely driven by increased contracting services activity of $8.3 million due to timing of public-agency work in Idaho and improved pricing of $1.4 million on ready-mix concrete and aggregates. Partially offsetting the increase was lower aggregate volumes across Montana and Wyoming because of additional precipitation and lower ready-mix concrete volumes in Montana as a result of timing of customer projects and decreased residential demand.
    EBITDA decreased $10.2 million for the quarter. The segment saw nearly $7.6 million in additional aggregate costs, mostly related to the timing of pre-production activities, such as stripping and harvesting, plant mobilization, and repair and maintenance; identified PIT Crew improvements; and lower production volumes due partly to additional precipitation in Montana and Wyoming. Contracting services also saw a $1.5 million decrease in margin due to more subcontract work performed in the quarter and the timing of when project incentives were earned.
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    Index
    Results of Operations - Central
    Three Months Ended
    March 31,
    2025 2024 % Change
    (In millions)
    Revenue$67.9$61.011%
    EBITDA$(24.3)$(18.7)(30)%
    EBITDA margin(35.8)%(30.7)%
    Three Months Ended
    March 31,
    2025 2024 
    (In millions)
    Revenues:
    Aggregates$17.1$15.9
    Ready-mix concrete25.623.0
    Asphalt6.85.1
    Other*2.41.9
    Contracting services24.521.2
    Internal sales(8.5)(6.1)
    $67.9$61.0
    *Other includes merchandise and other products that individually are not considered to be a core line of business for the segment.
    Three Months Ended March 31, 2025, Compared to Three Months Ended March 31, 2024

    Revenue increased $6.9 million in the quarter driven primarily by increased construction activity late in the quarter for public-agency paving projects in Texas, which also contributed to additional asphalt volumes, and higher ready-mix and aggregate sales volumes across the segment. Price increases of $900,000 on ready-mix concrete and asphalt also had a positive impact to the quarter. In addition, $2.9 million of the increase was due to the addition of Strata in March of 2025.
    EBITDA decreased $5.6 million driven largely by an increase in selling, general and administrative costs of $4.3 million, partly due to the addition of the operations of Strata in March of 2025 and higher labor-related costs primarily due to additional positions as the segment continues to grow and expand its operations. In addition, our northern operations experienced a $2.5 million increase in aggregate pre-productions costs. Partially offsetting the decrease were higher margins on both ready-mix concrete and asphalt due to price increases.
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    Index
    Results of Operations - Energy Services
    Three Months Ended
    March 31,
    2025 2024 % Change
    (In millions)
    Revenue$13.9$12.89%
    EBITDA$(7.8)$(2.5)(214)%
    EBITDA margin(56.0)%(19.4)%
    Three Months Ended
    March 31,
    2025 2024 
    (In millions)
    Revenues:
    Liquid Asphalt
    $12.2$11.0
    Other*3.03.1
    Internal sales(1.3)(1.3)
    $13.9$12.8
    *Other includes fabric and spreading, burner fuels, merchandise and other products that individually are not considered to be a core line of business for the segment.
    Three Months Ended March 31, 2025, Compared to Three Months Ended March 31, 2024

    Revenue increased $1.1 million primarily due to contributions from the acquisition of Albina Asphalt in November 2024, partially offset by lower volumes in the Texas markets mainly due to below normal temperatures in the first two months of the quarter.
    EBITDA decreased $5.3 million, as a result of higher operating costs of $3.8 million due to the addition of seasonal costs to prepare for the upcoming paving season at Albina. Additionally, planned maintenance activities for required railcar maintenance, as well as continued tank and equipment repair costs at our California terminals, contributed an additional $750,000 in expenses. We also experienced higher selling, general and administrative costs of $2.2 million compared to last year, primarily related to the addition of the Albina operations in 2024.
    Corporate Services and Eliminations
    Corporate Services includes all expenses related to the corporate functions of our company, as well as insurance activity at our captive insurer; interest expense on a majority of our long-term debt; interest income; and unrealized gains or losses on investments for nonqualified benefit plans.
    Three Months Ended March 31, 2025, Compared to Three Months Ended March 31, 2024
    During the first quarter of 2025, Corporate Services contributed negative EBITDA of $18.0 million, compared to negative EBITDA of $12.7 million in the prior year. Corporate Services had higher selling, general and administrative costs of $3.8 million in the quarter, driven largely by higher due diligence and integration costs of $5.8 million related to corporate development and completed acquisitions, as well as higher labor-related costs for additional staff and stock-based compensation expense. Offsetting these increased costs was the absence of one-time Separation costs in 2024 of $1.7 million and lower health care costs due to the absence of a high dollar claim in 2024. Corporate Services also had lower returns on our nonqualified benefit plan investments in 2025, which reduced EBITDA by $1.8 million.
    Liquidity and Capital Resources
    At March 31, 2025, we had unrestricted cash and cash equivalents of $86.1 million, working capital of $624.6 million and borrowing capacity of $477.1 million on our revolving credit agreement, net of our outstanding letters of credit. Working capital is calculated as current assets less current liabilities. As of March 31, 2025, we had sufficient liquid assets and borrowing capacity to meet our financial commitments, debt obligations and anticipated capital expenditures for at least the next 12 months.
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    Index
    Given the seasonality of our business, we typically experience significant fluctuations in working capital needs and balances throughout the year. Working capital requirements generally increase in the first half of the year as we build up inventory and focus on preparing our equipment, facilities and crews for our construction season. Working capital levels then decrease as the construction season winds down and we collect on receivables.
    The ability to fund our cash needs will depend on the ongoing ability to generate cash from operations and obtain debt financing with competitive rates. We rely on access to capital markets as sources of liquidity for capital requirements not satisfied by cash flows from operations, particularly in the first half of the year due to the seasonal nature of the business. Our principal uses of cash in the future will be to fund our operations, working capital needs, capital expenditures, repayment of debt and strategic business development transactions.
    On March 7, 2025, we entered into an amendment to our senior secured credit agreement to increase our revolving credit agreement from $350 million to $500 million and extend the maturity to March 7, 2030, refinance our existing $275 million Term Loan A with a maturity of March 7, 2030, and provide for a new Term Loan B in an aggregate principal amount of $500.0 million with a maturity date of March 8, 2032. For more information on the debt agreements and covenant restrictions, see Note 13.
    Capital expenditures
    We are committed to disciplined capital allocation, including reinvesting in our company to maintain fixed assets, improve operations and grow our business.
    We currently estimate total 2025 capital expenditures for maintenance and improvement to be between $155 million and $215 million. For the three months ended March 31, 2025, we spent $63.9 million, largely on the replacement of depleting aggregate reserves, construction equipment and plant improvements.
    Additionally, for the three months ended March 31, 2025, we spent $454.5 million on growth initiatives, including $433.4 million on Strata (net of working capital adjustments and cash acquired), $10.0 million on an aggregate quarry operation and $11.1 million on greenfield projects. As part of the Strata acquisition, we also received proceeds of $14.5 million on the sale of four ready-mix plant operations. For the remainder of 2025, we estimate to spend an additional $57 million on organic growth projects. Capital expenditures for future acquisitions and future organic growth opportunities would be incremental to our outlined capital program. It is anticipated that capital expenditures for 2025 will be funded by various sources, including internally generated cash and debt facilities.
    In addition to cash on hand, we used the proceeds from the issuance of a new $500 million Term Loan B facility to fund a portion of Strata's purchase price. Separately, we also increased the total commitments under our existing revolving credit facility from $350 million to $500 million for future expenditures and extended the maturity date of our existing senior secured credit facilities from 2028 to 2030.
    Cash flows
    Three Months Ended
    March 31,
     2025 2024 
    (In millions)
    Net cash provided by (used in)
    Operating activities$(125.3)$(43.2)
    Investing activities(503.6)(45.1)
    Financing activities486.3 (3.3)
    Decrease in cash, cash equivalents and restricted cash(142.6)(91.6)
    Cash, cash equivalents and restricted cash -- beginning of year281.1 262.3 
    Cash, cash equivalents and restricted cash -- end of period$138.5 $170.7 
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    Index
    Operating activities 
    Three Months Ended
    March 31,
     2025 2024 Variance
    (In millions)
    Components of net cash used in operating activities:
    Net loss$(68.7)$(47.6)$(21.1)
    Adjustments to reconcile net loss to net cash used by operating activities
    38.2 32.2 6.0 
    Changes in current assets and liabilities, net of acquisitions:
    Receivables41.1 76.8 (35.7)
    Inventories(50.4)(56.2)5.8 
    Other current assets(35.5)(16.5)(19.0)
    Accounts payable(12.8)(4.2)(8.6)
    Other current liabilities(40.3)(39.7)(.6)
    Pension and postretirement benefit plan contributions(.1)(.1)— 
    Other noncurrent charges3.2 12.1 (8.9)
    Net cash used in operating activities$(125.3)$(43.2)$(82.1)
    Cash used in operating activities at March 31, 2025, increased $82.1 million, largely related to higher working capital needs and higher net loss in the period. Cash used by working capital components totaled $97.9 million for the three months ended March 31, 2025, compared to $39.8 million for the three months ended March 31, 2024. The change in cash was primarily the result of higher receivables due to lower collections and higher revenues in first quarter 2025; timing of prepaid insurance and income taxes; and fluctuations in the timing of payment on accounts payable. Partially offsetting these changes was lower aggregates inventory due to lower production in the quarter, offset in part by higher liquid asphalt with the addition of Albina in November of 2024.
    Investing activities
    Three Months Ended
    March 31,
     2025 2024 Variance
    (In millions)
    Capital expenditures$(75.0)$(43.7)$(31.3)
    Acquisitions, net of cash acquired(443.4)— (443.4)
    Net proceeds from sale or disposition of property and other17.5 1.6 15.9 
    Investments(2.7)(3.0).3 
    Net cash used in investing activities$(503.6)$(45.1)$(458.5)
    The increase in cash used in investing activities for the three months ended March 31, 2025, compared to the three months ended March 31, 2024, was primarily due to the acquisition of Strata and an aggregates quarry operation in the first quarter of 2025, as discussed in Note 10, as well as higher capital expenditures, including routine replacement of vehicles and equipment, plant improvements and the replenishment of depleting aggregate reserves. The increase in cash usage was offset in part by proceeds from the sale of ready-mix operations in the Central segment in the first quarter of 2025, as discussed in Note 10.
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    Index
    Financing activities
    Three Months Ended
    March 31,
     2025 2024 Variance
    (In millions)
    Issuance of long-term debt$500.0 $— $500.0 
    Repayment of long-term debt— (1.7)1.7 
    Debt issuance costs(11.1)— (11.1)
    Tax withholding on stock-based compensation
    (2.6)(1.6)(1.0)
    Net cash provided by (used in) financing activities$486.3 $(3.3)$489.6 
    The increase in cash flows provided by financing activities for the three months ended March 31, 2025, compared to the three months ended March 31, 2024, was largely related to the funding of a new Term Loan B in March of 2025, as discussed in Note 13. Offsetting the cash provided by long-term debt were higher debt issuance costs associated with the amendment of our senior secured credit agreement to increase our revolving credit facility capacity, extend the maturity date of the revolving credit facility and Term Loan A, and the issuance of a new Term Loan B.
    Material cash requirements
    There were no material changes in the contractual obligations from those reported in the 2024 Annual Report other than as set forth below. For more information on our contractual obligations on long-term debt, operating leases and purchase commitments, see Part II, Item 8 in the 2024 Annual Report.
    Our material short-term and long-term cash requirements include repayment of third-party long-term debt and related interest payments, payments on operating lease agreements, payments of obligations on purchase commitments and asset retirement obligations.
    At March 31, 2025, our long-term debt reflected an increase of approximately $500.0 million from the balance at December 31, 2024. This increase is due to issuing a new $500 million Term Loan B facility with the proceeds being used to fund a portion of Strata's purchase price.
    At March 31, 2025, our total estimated interest payments over the life of our debt reflected an increase of approximately $243.0 million from the total estimated interest payments at December 31, 2024. This increase is due to the change in long-term debt outstanding related to the new Term Loan B previously mentioned.
    Defined benefit pension plans
    We have noncontributory qualified defined benefit pension plans for certain employees. Various assumptions are used in calculating the benefit expense (income) and liability (asset) related to these plans. Costs of providing these benefits are dependent upon assumptions of future conditions and bear the risk of changing.
    There were no material changes to our qualified noncontributory defined benefit pension plans from those reported in the 2024 Annual Report. We do not expect to make any pension plan contributions in 2025 as the plan is fully funded. For more information, see Part II, Item 8 in the 2024 Annual Report.
    Non-GAAP Financial Measures
    The Business Segment Financial and Operating Data includes financial information prepared in accordance with GAAP, as well as EBITDA, EBITDA margin, Adjusted EBITDA and Adjusted EBITDA margin, as well as total segment measures, as applicable, that are considered non-GAAP measures of financial performance. These non-GAAP financial measures are not measures of financial performance under GAAP. The items excluded from these non-GAAP financial measures are significant components in understanding and assessing financial performance. Therefore, these non-GAAP financial measures should not be considered substitutes for the applicable GAAP metric.
    EBITDA, EBITDA margin, Adjusted EBITDA and Adjusted EBITDA margin are most directly comparable to the corresponding GAAP measures of net income and net income margin. We believe these non-GAAP financial measures, in addition to corresponding GAAP measures, are useful to investors by providing meaningful information about operational efficiency compared to our peers by excluding the impacts of differences in tax jurisdictions and structures, debt levels and capital investment. We believe Adjusted EBITDA and Adjusted EBITDA margin are useful performance measures because they allow for an effective evaluation of our operating performance by excluding stock-based compensation and unrealized gains and losses on benefit plan investments as they are considered non-cash and not part of our core operations. We also exclude the one-time, non-recurring costs associated with the Separation as those are not expected to continue. We believe EBITDA and Adjusted EBITDA assist rating agencies and investors in comparing operating performance across operating periods on a consistent basis by excluding items management does not believe
    35

    Index
    are indicative of our operating performance. Additionally, EBITDA and Adjusted EBITDA are important financial metrics for debt investors who utilize debt to EBITDA and debt to Adjusted EBITDA ratios. We believe these non-GAAP financial measures, including total segment measures, as applicable, are useful performance measures because they provide clarity as to our operational results. Our management uses these non-GAAP financial measures in conjunction with GAAP results when evaluating our operating results internally and calculating employee incentive compensation.
    EBITDA is calculated by adding back income taxes, interest expense (net of interest income) and depreciation, depletion and amortization expense to net income (loss). EBITDA margin is calculated by dividing EBITDA by revenues. Adjusted EBITDA is calculated by adding back unrealized gains and losses on benefit plan investments, stock-based compensation and one-time Separation costs, to EBITDA. Adjusted EBITDA margin is calculated by dividing Adjusted EBITDA by revenues. These non-GAAP financial measures are calculated the same for both the total segment and consolidated metrics and should not be considered as alternatives to, or more meaningful than, GAAP financial measures such as net income or net income margin, and are intended to be helpful supplemental financial measures for investors’ understanding of our operating performance. Our non-GAAP financial measures are not standardized; therefore, it may not be possible to compare these financial measures with other companies’ EBITDA, EBITDA margin, Adjusted EBITDA and Adjusted EBITDA margin measures having the same or similar names.
    The following information reconciles segment and consolidated net loss to EBITDA and Adjusted EBITDA and provides the calculation of EBITDA margin and Adjusted EBITDA margin. Interest expense, net, is net of interest income that is included in other income on the Consolidated Statements of Operations.
    Three Months Ended
    March 31,
    20252024
    (In millions)
    Net loss
    $(68.7)$(47.6)
    Depreciation, depletion and amortization38.8 32.2 
    Interest expense, net13.1 11.1 
    Income taxes(24.7)(16.3)
    EBITDA$(41.5)$(20.6)
    Unrealized (gains) losses on benefit plan investments.7 (1.2)
    Stock-based compensation expense2.8 1.8 
    One-time separation costs
    — 2.3 
    Adjusted EBITDA$(38.0)$(17.7)
    Revenue$353.5 $329.6 
    Net loss margin
    (19.4)%(14.5)%
    EBITDA margin(11.7)%(6.2)%
    Adjusted EBITDA margin(10.7)%(5.4)%
    New Accounting Standards
    For information regarding new accounting standards, see Note 3, which is incorporated by reference.
    Critical Accounting Estimates
    Our critical accounting estimates include revenue recognized using the cost-to-cost measure of progress for contracts; fair values of acquired assets and liabilities assumed under the acquisition method of accounting; impairment testing of goodwill; and impairment testing of long-lived assets excluding goodwill. There were no material changes in the Company's critical accounting estimates from those that were previously reported in the Company's 2024 Annual Report.
    Item 3. Quantitative and Qualitative Disclosures About Market Risk
    We are exposed to the impact of market fluctuations associated with interest rates and commodity prices. We have policies and procedures to assist in controlling these market risks and from time to time have utilized derivatives to manage a portion of our risk.
    Interest rate risk
    As of March 31, 2025, we had $764.7 million in term loans outstanding which bear interest at a variable rate. As of March 31, 2025, the weighted-average rate in effect was 6.20 percent, therefore, a hypothetical increase of 1.00 percent to the interest rate
    36

    Index
    at March 31, 2025, would increase the all-in rate to 7.20 percent, the effect of which would increase the Company's interest expense by $7.6 million over the next 12 months based on the balances outstanding for these borrowings as of March 31, 2025.
    At March 31, 2025, we had no outstanding interest rate hedges.
    Commodity price risk
    There were no material changes to commodity price risk that we faced from those reported in the 2024 Annual Report.
    Item 4. Controls and Procedures
    Evaluation of disclosure controls and procedures
    The term "disclosure controls and procedures" is defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act. The Company's disclosure controls and other procedures are designed to provide reasonable assurance that information required to be disclosed in the reports that the Company files or submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC's rules and forms. The Company's disclosure controls and other procedures are designed to provide reasonable assurance that information required to be disclosed is accumulated and communicated to management, including the Company's chief executive officer and chief financial officer, to allow timely decisions regarding required disclosure. The Company's management, with the participation of the Company's chief executive officer and chief financial officer, has evaluated the effectiveness of the Company's disclosure controls and other procedures as of the end of the period covered by this report. Based upon that evaluation, the chief executive officer and the chief financial officer have concluded that, as of the end of the period covered by this report, such controls and procedures were effective at a reasonable assurance level.
    Changes in internal controls
    We completed the acquisitions of Albina Asphalt and Strata Corporation on November 2, 2024 and March 7, 2025, respectively. Under the guidelines established by the SEC, companies are permitted to exclude acquisitions from their assessment of internal control over financial reporting during the first year of an acquisition while integrating the acquired company. We are in the process of assessing the internal control over financial reporting of the acquired companies and integrating them with our existing internal controls over financial reporting.

    Except as noted above, there were no changes in our internal controls over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) that occurred during the quarter ended March 31, 2025, that has materially affected, or is reasonably likely to materially affect, the Company's internal control over financial reporting.
    37

    Index
    Part II -- Other Information
    Item 1. Legal Proceedings
    There were no material changes to the Company's legal proceedings that were previously reported in Part 1, Item 3 - Legal Proceedings in the 2024 Annual Report.
    Item 1A. Risk Factors
    Refer to the Company's risk factors that are disclosed in Part I, Item 1A. Risk Factors in its 2024 Annual Report that could be materially harmful to the Company's business, prospects, financial condition or financial results if they occur.
    Item 2. Unregistered Sales of Equity Securities and Use of Proceeds
    None.
    Item 3. Defaults Upon Senior Securities
    None.
    Item 4. Mine Safety Disclosures
    For information regarding mine safety violations or other regulatory matters required by Section 1503(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act and Item 104 of Regulation S-K, see Exhibit 95 to this Form 10-Q, which is incorporated herein by reference.
    Item 5. Other Information
    During the three months ended March 31, 2025, no director or officer of the Company adopted or terminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as each term is defined in Item 408(a) of Regulation S-K.
    Item 6. Exhibits
    See the index to exhibits immediately preceding the signature page to this report.
    38

    Index
    Exhibits Index
    Incorporated by Reference
    Exhibit NumberExhibit DescriptionFiled
    Herewith
    Furnished
    Herewith
    FormPeriod
    Ended
    ExhibitFiling
    Date
    File Number
    3.1
    Amended and Restated Certificate of Incorporation of Knife River Corporation
    8-K3.16/01/231-41642
    3.2
    Amended and Restated Bylaws of Knife River Corporation
    8-K3.26/01/231-41642
    *10.1
    First Amendment, dated as of March 7, 2025, among Knife River Corporation, as borrower, the guarantors party thereto, the lenders and other parties party thereto, and JPMorgan Chase Bank, N.A., as administrative agent
    8-K10.13/10/251-41642
    10.2+
    Form of Restricted Stock Unit Award Agreement under the Long-Term Performance-Based Incentive Plan, effective February 27, 2025
    X
    10.3+
    Form of Performance Stock Unit Award Agreement under the Long-Term Performance-Based Incentive Plan, effective February 27, 2025
    X
    10.4+
    Knife River Corporation, 401(k) Retirement Plan, as amended March 17, 2025
    X
    10.5+
    Knife River Corporation Section 16 Officers and Directors with Indemnification Agreements Chart, as of April 19, 2025
    X
    10.6+
    Form of Knife River Corporation Director and/or Executive Officer Indemnification Agreement
    X
    31.1
    Certification of Chief Executive Officer filed pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
    X
    31.2
    Certification of Chief Financial Officer filed pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
    X
    32
    Certification of Chief Executive Officer and Chief Financial Officer furnished pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

    X
    95
    Mine Safety Disclosures
    X
    101.INSXBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document
    101.SCHXBRL Taxonomy Extension Schema Document
    101.CALXBRL Taxonomy Extension Calculation Linkbase Document
    101.DEFXBRL Taxonomy Extension Definition Linkbase Document
    101.LABXBRL Taxonomy Extension Label Linkbase Document
    101.PREXBRL Taxonomy Extension Presentation Linkbase Document
    104Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)
    + Management contract, compensatory plan or arrangement.
    * Certain schedules and exhibits have been omitted pursuant to Item 601(a)(5) of Regulation S-K. The Company agrees to furnish supplementally a copy of any omitted schedule or exhibit to the SEC upon its request.

    39

    Index
    Signatures
    Pursuant to the requirements of the Exchange Act, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.
      Knife River Corporation
        
    DATE:May 6, 2025BY:/s/ Nathan W. Ring
       Nathan W. Ring
       Vice President and Chief Financial Officer
        
        
      BY:/s/ Marney L. Kadrmas
       Marney L. Kadrmas
       
    Vice President and Chief Accounting Officer


    40
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