Skip to content
KStart free
AI InfrastructureDefenseQuantumAll studies →

KNF US Equity

Knife River CorpMaterials · Mining & Quarrying of Nonmetallic Minerals (No Fuels) · CIK 1955520 · FY ends Dec 31
$66.17
+0.21 (+0.32%)
USD · as of 2026-08-21 · marketstack

KNF · 10-K · period ended 2024-12-31

← all KNF documents
filed 2025-02-21 · EDGAR original ↗

Our rendering of the filing — original pagination and typography are not reproduced, and tables are reduced to their short label cells (the figures live on FA). Nothing is summarized: every line below is the filing's own text.

blocks 1600 of 1,917371k characters rendered

knf-20241231

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

For the fiscal year ended December 31, 2024

OR

For the transition period from _____________ to ______________

Commission file number 1-41642

Knife River Corporation

(Exact name of registrant as specified in its charter)

1150 West Century Avenue

P.O. Box 5568

Bismarck, North Dakota58506-5568

(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 class Trading symbol(s) Name of each exchange on which registered

Common Stock, $0.01 par value KNF New York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☒ No ☐.

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ☐ No ☒.

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 has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☒

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant's executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes ☐ No ☒.

State the aggregate market value of the voting common stock held by non-affiliates of the registrant as of June 28, 2024: $3,970,815,129.

Indicate the number of shares outstanding of the registrant's common stock, as of February 13, 2025: 56,612,705 shares.

DOCUMENTS INCORPORATED BY REFERENCE

Relevant portions of the registrant's 2025 Proxy Statement, to be filed no later than 120 days from December 31, 2024, are incorporated by reference in Part III, Items 10, 11, 12, 13 and 14 of this Annual Report on Form 10-K.

Part I Page

Forward-Looking Statements v

Item 1 Business 1

Item 1A Risk Factors 13

Item 1B Unresolved Staff Comments 31

Item 1C Cybersecurity 31

Item 2 Properties 33

Item 3 Legal Proceedings 37

Item 4 Mine Safety Disclosures 37

Part II

Item 6 Reserved 38

Item 7A Quantitative and Qualitative Disclosures About Market Risk 61

Item 8 Financial Statements and Supplementary Data 63

Consolidated Statements of Operations 69

Consolidated Statements of Comprehensive Income 70

Consolidated Balance Sheets 71

Consolidated Statements of Equity 72

Consolidated Statements of Cash Flows 73

Notes to Financial Statements 74

1. Organization and Basis of Presentation 74

2. Significant Accounting Policies 76

3. Acquisitions 84

4. Disaggregation of Revenue 86

5. Uncompleted Contracts 88

6. Property, Plant and Equipment 89

7. Goodwill and Other Intangible Assets 89

8. Fair Value Measurements 91

11. Asset Retirement Obligations 95

12. Stock-Based Compensation 95

13. Accumulated Other Comprehensive Loss 97

14. Cash Flow Information 98

15. Business Segment Data 99

17. Employee Benefit Plans 105

18. Commitments and Contingencies 113

i

Part II (continued) Page

19. Related-Party Transactions 114

Item 9A Controls and Procedures 116

Item 9B Other Information 116

Item 9C Disclosure Regarding Foreign Jurisdictions that Prevent Inspections 116

Part III

Item 10 Directors, Executive Officers and Corporate Governance 117

Item 11 Executive Compensation 117

Item 14 Principal Accountant Fees and Services 117

Part IV

Item 15 Exhibits, Financial Statement Schedules 118

ii

Index

The following abbreviations and acronyms used in this Form 10-K are defined below:

Abbreviation or Acronym

Annual Report Annual Report on Form 10-K for the year ended December, 31 2024

ASC FASB Accounting Standards Codification

ASU FASB Accounting Standards Update

CERCLA Comprehensive Environmental Response, Compensation and Liability Act

Company or Knife River Knife River Corporation

CyROC Cyber Risk Oversight Committee

DGCL Delaware General Corporation Law

Dodd-Frank Act Dodd-Frank Wall Street Reform and Consumer Protection Act

DOT Department of Transportation

EBITDA Margin EBITDA divided by revenue, a non-GAAP financial metric

EEO Federal Equal Employment Opportunity laws in the United States

EIN Employer Identification Number

EPA United States Environmental Protection Agency

Exchange Act Securities Exchange Act of 1934, as amended

FASB Financial Accounting Standards Board

FIP Funding improvement plan

GAAP Accounting principles generally accepted in the United States of America

GHG Greenhouse gas

Item 8 Financial Statements and Supplementary Data

IIJA Infrastructure Investment and Jobs Act

IRS Internal Revenue Service

Knife River - Northwest A direct wholly owned subsidiary of Knife River

MEPP Multiemployer pension plan

PCAOB Public Company Accounting and Oversight Board

iii

Index

PRP Potentially Responsible Party

RP Rehabilitation plan

SEC United States Securities and Exchange Commission

Securities Act Securities Act of 1933, as amended

SOFR Secured Overnight Financing Rate

iv

Index

Cautionary Statement Regarding Forward-Looking Statements

This Annual Report contains forward-looking statements within the meaning of Section 27A of the Securities Act and Section 21E of the 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), including, but not limited to, with respect to EDGE, growth, shareholder value creation, expected long-term goals, backlog margin, statements related to the acquisition of Strata (as defined later) or other proposed strategies and other statements that are other than statements of historical facts. From time to time, the Company may publish or otherwise make available forward-looking statements of this nature.

Forward-looking statements involve risks and uncertainties, which could cause actual results or outcomes to differ materially from those expressed. The Company's expectations, beliefs and projections are expressed in good faith and are believed by the Company to have a reasonable basis, including without limitation, management's examination of historical operating trends, data contained in the Company's records and other data available from third parties. Nonetheless, the Company's expectations, beliefs or projections, including, but not limited to, with respect to EDGE, growth, shareholder value creation, expected long-term goals, backlog margin, statements related to the acquisition of Strata or other proposed strategies, may not be achieved or accomplished and changes in such assumptions and factors could cause actual future results to differ materially.

Undo reliance should not be placed on forward-looking statements and any forward-looking statement contained in this document speaks only as of the date on which the statement is made, and the Company undertakes 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 the Company's 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 the Company, are expressly qualified by the risk factors and cautionary statements reported in the section entitled "Item 1A. Risk Factors" and subsequent filings with the SEC.

v

Index

Summary of Risk Factors

An investment in Knife River is subject to a number of risks. Set forth below is a high-level summary of some, but not all, of these risks. Please read the information in ”Item 1A. Risk Factors” for a more thorough description of these risks.

Operations, Growth and Competitive Risks

•We operate in a highly competitive industry.

•We may not be able to secure, permit or economically mine strategically located aggregate reserves.

•Our business is seasonal and subject to weather conditions that could adversely affect our operations.

•We are exposed to risk of loss resulting from nonpayment and/or nonperformance of our customers and counterparties.

•Our success depends, in part, on our ability to execute on our acquisition strategy, to successfully integrate acquired businesses and to retain key employees of acquired businesses.

•Technology disruptions or cyberattacks could adversely impact operations.

•Artificial intelligence presents risks and challenges that can impact our business.

•We may be unable to protect our intellectual property.

•Pandemics, including COVID-19, may have a negative impact on our business operations.

Economic and Political Risks

•Significant changes in prices for commodities, labor, or other production and delivery inputs could negatively affect our businesses.

•Supply chain disruptions may adversely affect our operations.

•Our business is based in large part on government-funded infrastructure projects and building activities, and any reductions or reallocation of spending or related subsidies in these areas could have an adverse effect on us.

•Economic volatility affects our operations, as well as the demand for our products and services.

Legal and Regulatory Compliance Risks

•We may be negatively impacted by pending and/or future litigation, claims or investigations.

•Unexpected factors affecting self-insurance claims and reserve estimates.

•Our operations could be negatively impacted by import tariffs and/or other government mandates.

•Our operations are subject to environmental laws and regulations.

•Our operations could be adversely impacted by severe weather events, including as a result of climate change.

•Stakeholder actions and increased regulatory activity related to environmental and other sustainability matters could adversely impact our operations.

•Changes in tax law may negatively affect our business.

Human Capital Risks

•Our operations may be negatively affected if we are unable to obtain, develop and retain key personnel and skilled labor forces.

•Increasing costs associated with health care plans may adversely affect our results of operations.

vi

Index

Financial and Accounting Risks

•Aggregate resource and reserve calculations are estimates and subject to uncertainty.

•Backlog may not accurately represent future revenue and gross margin.

•We operate in a capital-intensive industry and are subject to capital market and interest rate risks.

•Financial market changes could impact our defined benefit pension plans and obligations.

•Costs related to obligations under MEPPs could have a material negative effect on our results of operations and cash flows.

•We have substantial indebtedness and may incur substantial additional indebtedness.

•Despite our current level of indebtedness, we may be able to incur substantially more debt.

•A lowering or withdrawal of the ratings, outlook or watch assigned to us or our debt by rating agencies may increase our future borrowing costs and reduce our access to capital.

Separation Risks

•We have minimal history of operating as an independent, public company.

•We could be subject to significant tax liabilities or be required to indemnify MDU Resources for material taxes, and other related amounts, in connection with the Separation.

•United States federal income tax consequences may restrict our ability to engage in certain desirable strategic or capital-raising transactions after the Separation.

•We may not achieve some or all of the expected benefits of the Separation.

Shareholder Risks

•The trading market for our common stock has existed only a short period, and the market price and trading volume of our common stock may fluctuate significantly.

•If securities or industry analysts do not publish research or publish misleading or unfavorable research about our business, our stock price and trading volume could decline.

•Stockholder percentage of ownership in us may be diluted in the future.

•We cannot guarantee the timing, declaration, amount or payment of dividends, if any.

•Exclusive forum selection provisions in our amended and restated bylaws could discourage lawsuits against us and our directors and officers.

•Provisions in our amended and restated certificate of incorporation and amended and restated bylaws and Delaware law may prevent or delay an acquisition of Knife River.

Strata Acquisition Risks

•We may not be able to fully realize the benefits from the Acquisition.

•The announcement and pendency of the Acquisition may have an adverse effect on our results of operations.

•The failure to complete the Acquisition in a timely manner or at all could negatively impact the market price of our common stock.

•The incurrence by us of substantial indebtedness in connection with the financing of the Acquisition may have an adverse impact on our liquidity.

•We have incurred, and will continue to incur, transaction fees and costs in connection with the Acquisition.

vii

Index

PART I

ITEM 1. BUSINESS

Overview

Knife River Corporation (referred to as we, our, us, the Company or Knife River) is an aggregates-led construction materials and contracting services provider in the United States. Our 1.2 billion tons of aggregate reserves provide the foundation for our vertically integrated business strategy, with approximately 37 percent of our aggregates in 2024 being used internally to support value-added downstream products (ready-mix concrete and asphalt) and contracting services (asphalt paving, heavy-civil construction, 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.

Through our network of 182 active aggregate sites, 106 ready-mix plants, 51 asphalt plants and 9 liquid asphalt terminals, we supply construction materials and contracting services to customers across 14 states. Our construction materials are sold to public and private-sector customers, including federal, state and municipal governments, as well as industrial, commercial and residential developers and other private parties. Our contracting services are primarily provided 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.

The Separation

On May 31, 2023, the Separation of Knife River from MDU Resources was completed as a tax-free spin-off for U.S. federal income tax purposes. Following the Distribution, Knife River became an independent, publicly traded company and its common stock is listed under the symbol “KNF” on the New York Stock Exchange.

Strata Corporation Acquisition

On December 20, 2024, KRC Holdings, Inc. (“Buyer”), a Delaware corporation and an indirect subsidiary of the Company, entered into an Asset and Equity Purchase Agreement (the “Purchase Agreement”) by and among Buyer and (i) Strata Corporation, a North Dakota corporation (“Strata”), (ii) Glacier Resources, Ltd., a North Dakota corporation (“Glacier Resources” and, together with Strata, the “Acquired Companies”), (iii) the equity holders of the Acquired Companies (such equity holders together with a new corporation to be formed in connection with certain pre-closing restructuring activities, the “Equity Sellers”), (iv) Landmark Investments, L.L.C., a North Dakota limited liability company (“Asset Seller” and, together with the Equity Sellers, the “Sellers”), (v) the current equity holders of Asset Seller (the “Asset Seller Owners”), (vi) each of the ultimate beneficiaries of Equity Sellers that are trusts (together with the Sellers and the Asset Seller Owners, the “Seller Group Members”), and (vii) a representative of the Seller Group Members (“Sellers’ Representative”), whereby Buyer (or its designee) will acquire (a) 100% of the issued and outstanding equity interests of Strata, (b) 100% of the issued and outstanding equity interests of Glacier Resources and (c) certain assets of the Asset Seller (the “Acquisition”) for $454.0 million in cash, subject to customary purchase price adjustments pursuant to the terms and subject to the conditions set forth in the Purchase Agreement. In addition to cash on hand, Buyer intends to use a portion of the proceeds from the entry into a new $500 million Term Loan B facility to fund the Acquisition.

1

Index

Strata Corporation is a leading construction materials and contracting services provider in North Dakota and northwestern Minnesota. Strata is a vertically-integrated, aggregates-based company that will add 28 ready-mix plants, three asphalt plants, a construction division and rail and trucking assets to our existing operations in our Central segment. The Acquisition is expected to close in the first half of 2025, subject to customary closing conditions.

The foregoing description of the Purchase Agreement and the transactions contemplated thereby do not purport to be complete and are subject to, and qualified in their entirety by, the full text of the Purchase Agreement, a copy of which is attached as Exhibit 2.1 to our Current Report on Form 8-K, filed on December 26, 2024.

Business Segments

Our focus is on the vertical integration of our products and services by offering our customers a single source for construction materials and related contracting services. As of December 31, 2024, we operated in 14 states across the United States through six operating segments: Pacific, Northwest, Mountain, North Central, South and Energy Services. These operating segments are used to determine our reportable segments: Pacific, Northwest, Mountain, Central and Energy Services, which are based on our method of internal reporting and management of the business. Four 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 geographic segment offers a vertically integrated suite of products and services. Each of our geographic segments mines, processes and sells construction aggregates (crushed stone and sand and gravel); produces and sells asphalt; produces and sells ready-mix concrete as well as vertically integrating our contracting services to support our aggregate-based product lines. Contracting services include 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. The Energy Services segment, which has locations throughout our geographic footprint, produces and supplies liquid asphalt, primarily for use in asphalt road construction, and is a supplier to some of our other segments.

Additional details about each of the reportable segments as of and for the year ended December 31, 2024, is as follows:

Pacific Northwest Mountain Central Energy Services ConsolidatedKnife River

Properties:

Revenue Composition:

Public-Sector Services 72 % 77 % 79 % 95 % — % 83 %

Private-Sector Services 28 % 23 % 21 % 5 % — % 17 %

__________________

*Does not include 4 sites that are classified as exploration stage properties.

2

Index

On January 1, 2025, we completed a reorganization of our operating segments, including the management of the segments, to align with our business strategy. In the first quarter of 2025, we will begin reporting our financial information under four operating segments: West, Mountain, Central and Energy Services. Under the new operating structure, the previous Pacific and Northwest operating segments will become the West operating segment and the North Central and South operating segments will become the Central operating segment.

Business Strategy

Knife River is a leading aggregates-based construction materials and contracting services provider in the United States. We mine and process aggregates, produce and sell asphalt and ready-mix concrete, and provide related contracting services for both public infrastructure and private development projects. Headquartered in Bismarck, North Dakota, we operate across multiple regions in the Western United States, which allows us to benefit from diverse market conditions and varying construction cycles.

Our strategy is to maintain and grow a sustainable, profitable business by leveraging our vertical integration, strategic acquisition program and operational excellence. We strive to offer high-quality products and services while emphasizing safety, empowering our team members, being environmentally responsible and engaging with our local communities.

We believe our aggregates-led, vertically integrated business model—combined with our Western United States geographic footprint and our foundational EDGE strategy—provides a clear competitive advantage in driving long-term, profitable growth. Our EDGE strategy is focused on four key strategic areas:

EBITDA Margin Improvement: Drive sustained Adjusted EBITDA margin expansion towards our long-term goal, through a combination of commercial and operational initiatives that optimize the benefits of our vertically integrated strategy.

Discipline: Maintain a strong balance sheet and disciplined allocation of capital to support long-term profitable growth and value creation.

Growth: Further strengthen our market position through organic and inorganic growth opportunities, with an emphasis on aggregate-based operations in mid-sized, high-growth markets.

Excellence: Be best in class in all aspects of our business, providing ongoing, high-quality training at every level of the company to better serve our customers and provide advancement opportunities for our team.

Since implementing the EDGE strategy in 2023, we have steadily increased our Adjusted EBITDA margin, maintained a strong balance sheet, completed six acquisitions and drove excellence throughout the organization. For a discussion of Adjusted EBITDA and Adjusted EBITDA margin, see “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations-Non-GAAP Financial Measures.”

Industry

The United States construction materials industry is highly fragmented. Industry participants typically range from small, private companies focused on a single material, product or area to large, publicly traded corporations that provide a broad suite of materials and services. Companies compete on a variety of factors, including price, service, quality, delivery time and proximity to the customer. However, limitations on the distance that materials can be transported efficiently results in primarily local or regional operations. Accordingly, the number and size of competitors varies by geography and product lines.

The United States construction materials industry serves a diverse customer base that includes federal, state and municipal governmental agencies, commercial and residential developers and private parties. The mix of customers varies by region and economic conditions.

3

Index

The main factors and trends in the United States construction materials and related contracting services industry include:

•Key economic factors. Many factors affect product demand, including public spending on roads and infrastructure projects, general economic conditions, including population growth and employment levels, and prevailing interest rates.

•Location and transportation. Construction materials are expensive to transport due to their weight ratios, so they are generally produced and delivered locally or regionally. Access to well-positioned reserves is critical.

•Vertical integration. Market participants that operate a vertically integrated business model can access certain efficiencies that lead to reduced product costs and other benefits for customers, including greater reliability of supply.

•Industry fragmentation. There are thousands of construction materials producers and contracting services providers of varying scope and size. Market participants may enter new geographies or expand existing positions through the acquisition of existing facilities.

•Seasonality. Activity in certain areas is seasonal due to the effects of weather. Most of the production and sales of materials and related services in the northern United States occurs between May and October, in line with end market activity.

•Cyclicality. The demand for construction materials products and contracting services is significantly influenced by the cyclical nature of the economy.

•Regulations. Environmental and zoning approvals are often required for the development and expansion of facilities.

•Production inputs. Cost and availability of energy, labor and other inputs can vary over time based on macroeconomic factors and impact profitability of operations.

We participate in the following primary markets: aggregates, ready-mix concrete, asphalt, liquid asphalt and contracting services.

Aggregates

Aggregates, consisting of crushed stone and sand and gravel, are a natural, granular material engineered to various sizes and grades primarily for construction applications. Aggregates also are a major material component in the production of ready-mix concrete and asphalt. Aggregate sources can be found in relatively uniform sediments in certain regions of each state throughout the United States. Generally extracted through open pits at the surface of a site or produced by blasting hard rock from quarries, aggregates are then crushed and screened to customer needs.

The United States aggregates industry is highly fragmented, with many participants operating primarily in local and regional areas. In 2024, the United States Geological Survey reported that throughout the United States a total of 1,400 companies operated 3,500 quarries and 180 sales/distribution yards producing crushed stone and 3,400 companies operated 6,500 pits and 200 sales/distribution yards producing construction sand and gravel. This fragmentation is a result of high transportation costs that typically limit supply areas of producers.

Ready-Mix Concrete

Ready-mix concrete, a mixture principally comprised of aggregates, cement and water, is measured in cubic yards and specifically batched or produced for customers’ projects and then transported and poured on site. It also can be poured at a manufacturing facility to produce prefabricated building solutions, such as wall panels, concrete roofing systems, bridge girders, parking garages and stadium components. According to the National Ready Mixed Concrete Association, concrete is the most widely used material in the construction sector today.

4

Index

Due to the relative speed at which ready-mix concrete sets, supply is generally localized and delivered within close proximity to the production site, with an estimated 7,000-plus ready-mix concrete batching plants in the United States and Canada according to the National Ready Mixed Concrete Association. There has been a steady increase in shipments since the industry cycle low of 257 million cubic yards in 2010. In 2023, the National Ready Mixed Concrete Association estimated shipments of 400 million cubic yards of ready-mix concrete, which is 13 percent below the industry peak of 458 million cubic yards in 2005 and 0.4 percent lower than 2022.

Asphalt

Asphalt is a combination of approximately 95 percent aggregates bound together by approximately 5 percent liquid asphalt. Asphalt is typically used in new road construction as well as road maintenance and repair, covering approximately 94 percent of the 3 million miles of paved roads in the United States, according to the National Asphalt Pavement Association. Given the significant proportion of aggregates in asphalt, local aggregate producers often participate in the asphalt business to ensure an output for the producer’s aggregates.

Like ready-mix concrete, asphalt sets rapidly, limiting delivery to within close proximity to the production facility. In 2021, there were approximately 3,600 asphalt production sites in the United States that produced an estimated 432 million tons of asphalt, a 15 percent increase compared to the approximately 375 million tons produced five years prior. The asphalt paving industry also has a record of using economically and environmentally sustainable practices. Asphalt pavement material is highly recyclable, predominantly through reclaimed asphalt pavement. In 2024, we used approximately 1.4 million tons of recycled asphalt pavement in our asphalt production. Additionally, the use of warm-mix asphalt allows producers to reduce temperatures during the mixing process, lowering energy use and carbon emissions.

Liquid Asphalt

Liquid asphalt (sometimes referred to as asphalt cement or asphalt oil) is the binding agent used in combination with aggregates to produce asphalt mix for road construction, streets, parking lots, driveways and more. Our Energy Services segment supplies liquid asphalt to both internal and third-party customers, which helps support our vertically integrated business model. The segment has terminals in seven states, where it stores and manufactures value-added liquid asphalt, polymer modified asphalt and emulsions to meet the requirements of end users.

Contracting Services

We vertically integrate our construction materials with contracting services such as aggregate laydown, asphalt paving, concrete construction, site development and bridges. Demand in the contracting services industry is influenced by the cyclical nature of the construction industry and correlates with the demand for construction materials. The contracting services portion of our business is heavily weighted toward public markets, which provide more stability throughout the economic cycles. The contracting services industry is typically less capital-intensive than construction materials and has relatively fewer barriers to entry. Price is an important competitive factor in the award of service agreements. However, customers often consider several other factors in selecting a service provider, such as technical expertise and experience, safety ratings, geographic presence, financial and operational resources and industry reputation around dependability.

5

Index

Products and Services

Our core product lines include: aggregates, ready-mix concrete, asphalt and liquid asphalt. We also perform related contracting services.

For the year ended December 31, 2024, our revenue and gross profit by products and services were as follows:

Revenue ($ in millions) (% of total) Gross Profit ($ in millions) Margin

Internal sales (617.0)

(1) Aggregates

We supply high-quality aggregates through our 1.2 billion tons of permitted aggregate reserves, which are sourced from our aggregate sites across 11 states. We focus primarily on supplying markets with strong local demand, and in most cases serve customers close to our strategically located aggregate sites. In 2024, we sold 31.8 million tons of aggregates, with 30.3 million being produced from all aggregate mining properties.

We mine crushed stone and sand and gravel from our aggregate sites, as these aggregates are utilized in general construction and are a major component in our production of ready-mix concrete and asphalt paving products. Leveraging our vertically integrated platform, 34 percent of our aggregates revenue was derived from internal sales in 2024. For more information about the aggregate sites, see “Item 2. Properties.”

(2) Ready-Mix Concrete

We produce ready-mix concrete through our 106 ready-mix plants situated across 13 states. Our vertically integrated portfolio of assets allows us to provide most of the aggregates we use in the production of ready-mix concrete. Due to the time-sensitive nature of delivering ready-mix concrete, we focus on supplying customers near our facilities. In 2024, we sold 3.5 million cubic yards of ready-mix concrete.

Incremental to the hauling capabilities across products and services, ready-mix concrete plants are complemented by our fleet of ready-mix trucks and drivers who safely deliver heavy materials on time. We are an industry leader in safe and efficient delivery of ready-mix concrete and have pioneered what has become the industry-standard training program for ready-mix delivery professionals. We continue to update and improve the program with a focus on safety for drivers and the public.

The following table sets forth details applicable to our ready-mix concrete plants and related fleet as of December 31, 2024:

Segment Plants Mixer Trucks

6

Index

(3) Asphalt

We produce and deliver asphalt from 51 plants across 10 states, most often utilizing our own aggregates in the production process. Of the 51 plants, 20 are portable plants that support large asphalt paving projects on roadways, airports and commercial sites. Similar to ready-mix concrete, asphalt sets rapidly, limiting delivery to within close proximity to the production facility. In 2024, we sold 6.5 million tons of asphalt.

Asphalt plants

The following table sets forth details applicable to our non-portable and portable asphalt plants as of December 31, 2024:

Segment Non-portableAsphaltPlants PortableAsphaltPlants TotalAsphaltPlants

Pacific 4 — 4

(4) Liquid asphalt

We distribute liquid asphalt through our Energy Services sites and have the capacity to service neighboring states through storage facilities capable of storing approximately 413,000 tons of liquid asphalt across multiple states, a 50 percent increase over the prior year primarily due to the acquisition of Albina Asphalt in the fourth quarter of 2024. We have nine liquid asphalt terminal sites and six used-oil collection points.

(5) Other

Although not common to all locations, we provide various other products and services, depending on customer needs. These include, but are not limited to, retail sales of cement in Alaska and Hawaii and petroleum recovery services in the Energy Services segment.

Cement supply and storage

Cement is a key ingredient in the production of ready-mix concrete. Our core supply of cement is sourced from a diverse range of suppliers. We have strategically located cement storage facilities in Alaska and Hawaii that can hold approximately 60,000 tons and 90,000 tons of cement, respectively. We have six additional distribution centers with storage and barging capabilities across the islands of Hawaii.

(6) Contracting Services

Our contracting services include responsibilities as general contractor and subcontractor, aggregate laydown, asphalt paving, concrete construction, site development and bridges, and in some segments the manufacturing of prestressed concrete products. Vertical integration allows us to have direct internal access to critical raw materials, resulting in competitive advantages from better control of product inventory. In 2024, most of our contracting services were related to “horizontal” construction, such as streets and highways, airports and bridges for customers in the public sector. In the private sector, our contracting services projects were within the residential, commercial and industrial markets.

7

Index

The following table sets forth revenue details applicable to our contracting services for the year ended December 31, 2024:

Public Projects Private Projects

Streets & Highways 66 % Buildings/Sitework 3 %

Airports 5 % Residential 6 %

Bridges 4 % Streets & Highways 2 %

Marine 2 % Other 6 %

Other 6 %

Total 83 % Total 17 %

End Markets

Public Sector. Funding for public projects is dependent on federal, state and municipal government budget appropriations for various projects, such as highways, bridges, airports, schools, public buildings and other public-infrastructure projects. We believe public-sector funding is subject to fewer fluctuations in spending, as government funding tends to be less correlated with economic cycles and more reliant on approvals of government appropriation bills toward infrastructure initiatives. States continue to move forward with allocating funds from federal programs, such as the IIJA, which is authorized to provide $1.2 trillion in funding from 2022 through 2026. As of November 2024, approximately 43 percent of IIJA formula funding has yet to be obligated to projects in our market areas. In 2024, six of the 14 states where we operate have passed ballot measures to increase their transportation investment. Additionally, DOT budgets in the states where we operate remain strong, which favorably affects our outlook. We continue to monitor the implementation and impact of these legislative items and state DOT budgets.

Private Sector. Our private-sector customers include both residential and nonresidential construction applications. Unlike public-sector customers, spending by private-sector customers is more dependent on local and national economic cycles. We leverage our diverse geographic footprint to partially offset volatility originating from single local economies, and have the flexibility to reallocate resources from markets experiencing a downturn to markets that may be experiencing an economic upswing.

Residential construction typically includes single-family homes and multi-family units, such as apartments and condominiums. Demand for residential construction is influenced primarily by population growth, employment prospects and mortgage interest rates. While growth rates vary across the United States, overall residential construction demand increased during 2024. According to the United States Census Bureau, residential construction in 2024 was $917.9 billion, which was 5.9 percent above 2023 amounts.

Alternatively, nonresidential construction includes all privately financed construction other than residential structures, such as data centers, warehouses, office buildings, factories, shopping malls, restaurants and other commercial structures. Nonresidential construction tends to lag residential activity and is mostly driven by population and economic growth trends and activity levels. According to the United States Census Bureau, nonresidential construction in 2024 was $743.8 billion, which was 5.3 percent above 2023 amounts. Residential and nonresidential private construction are not major sources of revenue for all our segments, but they are important markets for the materials side of our business. In addition to providing aggregates to these end markets, the majority of our downstream ready-mix volumes go into private-sector projects.

Customers

Our customers consist of public and private-sector customers, with public-sector customers contributing about 83 percent of our revenues from contracting services in 2024. The public side includes federal, state and municipal governmental agencies with contracting services projects related to highways, streets and other public infrastructure. Funding available for construction from governmental agencies largely depends on federal, state and municipal budgets allocated to the expansion and improvement of national infrastructure. The private side includes a broad spectrum of customers across industrial, commercial and residential developers and other private parties. The mix of sales by customer class varies year to year depending on the variability in type of work.

8

Index

Our top 15 customers accounted for about 22 percent of our 2024 revenue, of which seven were state-level DOTs. We are not dependent on any single customer or group of customers for sales of our products and services, where the loss of which would have a material adverse effect on our business. No individual customer accounted for more than 10 percent of our 2024 revenue.

Competition

We operate in a largely fragmented industry, including large, public companies and many small, privately held companies. Smaller, independent operators make up the majority of our competition; however, we also face competition in some markets from large, publicly traded United States aggregates producers, including Cemex S.A.B. de C.V., CRH plc, Eagle Materials, Inc., Granite Construction, Inc., Heidelberg Materials, Holcim, Martin Marietta Materials, Inc., Construction Partners, Inc., and Vulcan Materials Company. The nature of our competition varies among our products and geographies due to the generally local and regional nature of supply.

We believe we have a competitive advantage in aggregates through our high-quality, strategically located reserves and assets, and our internal fleet of trucks, rail and barge. Our vertical integration and local knowledge enables us to maintain a strong understanding of the needs of our customers. In addition, we have a strong commitment to environmental stewardship, which assists us in obtaining new permits and new reserves.

Seasonality

Results are affected by seasonal fluctuations, with the second and third quarters historically being the quarters with the highest activity. Our ability to provide contracting services in the states where we operate depends on the weather. In states with colder winter weather, our contracting services are primarily performed from May through October, compared to most of the year in states with largely consistent warmer weather.

Employees

“People” is the first of our core values. We consider our employees to be our most valuable resource and they are critical to our success. Significant resources are utilized to attract, develop and retain extraordinary and diverse talent and fully promote each employee’s capabilities. Our focus on workforce, talent development, talent acquisition and succession planning has provided for a deep bench of talented employees. Employees in managerial or supervisory positions have an average tenure of 15 years, which demonstrates our workforce’s pride in and dedication to the company. We believe we have good relationships with our employees, including our unionized workforce.

As of December 31, 2024, we employed 4,761 people, all of whom were employed in the United States. The total number of hourly personnel at any given time is subject to the volume of projects in progress and fluctuates on a seasonal basis. At the peak of the 2024 construction season, we employed over 5,900 people. The table below provides additional details on the employee demographics as of December 31, 2024.

Union Non-Union Total

Our union employees are represented by 39 collective-bargaining agreements, four of which are currently in negotiations. The majority of the collective-bargaining agreements contain provisions that prohibit work stoppages or strikes and provide dispute resolution through binding arbitration in the event of an extended disagreement. We maintain good working relationships with labor unions and do not anticipate any significant issues with any unions in 2025.

9

Index

Our compensation programs are designed around competitive market-based pay, coupled with an incentive structure aligned with our financial performance and the employees’ individual performance, which aids in attracting, retaining and motivating employees to achieve the best possible results. In addition, full-time employees are eligible for health insurance, physical, mental and financial wellness programs, paid and unpaid leave, retirement plans, life insurance, disability and accident coverage, and more. We also offer a variety of voluntary benefits to allow employees to select the best options to meet their individual needs.

To be the employer of choice for the broadest pool of talent and skill, we are committed to equal employment opportunity and affirmative action and are dedicated to the achievement of equality and opportunity for all employees and applicants for employment. We strive to meet or exceed all EEO and affirmative action laws, directives and legislation. Our EEO/Affirmative Action Policy ensures employees are not discriminated against.

We are committed to the development and training of our employees and have taken significant steps to showcase construction as a career of choice. We own and operate a state-of-the-art training facility, the Knife River Training Center, which is used corporate-wide to enhance the skills of both our new, and existing employees through both classroom education and hands on experience. The training facility also offers a variety of courses around leadership development available for all employees.

We prioritize providing opportunities for advancement through job mobility, mentorships, succession planning and promotions. We operate under a philosophy to promote from within and offer advancement opportunities at all levels of employment, which helps retain talented employees. We engage in talent and succession planning processes and review succession plans with senior leaders at least annually, focusing on high-performing and high-potential talent, diverse talent, and succession for critical roles. We provide annual compliance training for all office staff and had 100 percent participation in 2024. We are also currently rolling out Coaches Clinics for mid-level management and have expanded our internship program.

For additional information related to human capital and other information, refer to our 2024 Sustainability Report, which is expected to be published to our website in the first quarter of 2025, and is not incorporated by reference herein.

Health and Safety

Safety is a core value at our company and is foundational to establishing a culture of safety excellence in the workplace, not just for our employees, but for the safety and well-being of our contractors, customers, and the residents of the communities where we operate.

Our safety program utilizes the three Ts: Tools, Training and Time, as a structure for us to provide our employees with the proper tools and training to safely and successfully perform their jobs. We continuously promote our commitment to the safety and health of our employees through a variety of resources, including continual training, education programs, and benefit offerings.

We also adhere to seven key principles regarding safety:

•All injuries can be prevented;

•Working safely is a condition of employment for all employees;

•Management must demonstrate leadership in preventing injuries by providing a safe work environment, adequate resources, performance incentives and appropriate follow-up on any unsafe conditions or actions;

•All employees are responsible for preventing injuries to themselves and others;

•All operating exposures can be safeguarded or controlled;

•Training employees to work safely is essential; and

•Preventing personal injuries and property damage is good business.

10

Index

We have a goal of zero workplace injuries and have developed a safety culture complete with programs, trainings, and best practices appropriate for our industry and operations. As a core value, we are continuously striving to improve and implement strategies to enhance our safety objectives.

Environmental Regulations

With environment being one of our core values, our pledge to operate in an environmentally responsible manner is reviewed and encouraged through several measures, including oversight by professional environmental staff with reporting and accountability to regional operations leaders, regular review of environmental and sustainability disclosures by the executive Sustainability Committee, thorough audits of operating activities, and in-depth property reviews during due diligence on potential acquisitions.

We are subject to complex federal, state and local environmental compliance and reclamation regulations. These federal, state and local laws and regulations include, among others: the federal Clean Air Act and the federal Clean Water Act; the Resource Conservation and Recovery Act; the federal Mine Safety and Health Administration; the federal Occupational Safety and Health Administration; the federal CERCLA; the federal EPA; and, occasionally, the Endangered Species Act. These laws and regulations impose numerous obligations and limitations on our operations, including:

•Zoning and land use requirements to obtain a permit or other approval before conducting regulated activities;

•Restriction on the types, quantities and concentration of materials that can be released into the environment (including noise and discharges to air and water);

•Restrictions on the management of hazardous wastes and underground storage tank systems, as well as obligations to clean up or remediate spills of hazardous materials into the environment;

•Limitation or prohibition of activities on certain lands lying within wilderness, wetlands or other protected areas;

•Obligations to restore or reclaim former mining areas;

•Requirements to comply with specific health and safety criteria addressing worker protection; and

•The imposition of substantial liabilities for pollution which may result from our operations.

Our operations are also subject to California emission reductions and regulatory compliance. The California Air Resources Board has implemented several regulations around air quality standards, including reporting requirements. These regulations are based on source categories, several of which impact our company. The three categories having the most impact to our California operations are: off-road diesel particulate and oxides of nitrogen; on-road diesel particulate and oxides of nitrogen; and harbor craft diesel particulate and oxides of nitrogen. In addition, beginning in 2026, we will be required to publicly report on 2025 scope 1 and scope 2 GHG emissions, and beginning in 2027 reporting on 2026 scope 3 GHG emissions will be required. Noncompliance with these laws and regulations can subject us to fines, loss of licenses or registrations, or various forms of civil or criminal prosecution, any of which could have a material adverse effect on our reputation, business, financial position, results of operations and cash flows.

In addition, certain environmental laws, such as CERCLA and EPA, impose strict requirements for companies to pay to remediate and restore sites where hazardous substances, hydrocarbons or solid wastes have been disposed, stored or released. We may be required to remediate contaminated properties currently or formerly owned or operated by us or materials we have disposed of, regardless of whether such contamination resulted from actions taken by us or from the conduct of others at the time those actions were taken. In addition, in connection with certain acquisitions, we could assume, or be required to provide indemnification against, environmental liabilities that could expose us to material losses. Furthermore, the existence of contamination at properties owned, leased or operated by us could result in increased operation costs or restrictions on our ability to use those properties as intended, including for mining purposes. One such site is the Portland, Oregon, Harbor Superfund Site where Knife River -

11

Index

Northwest was named as a PRP by the EPA related to a commercial property site acquired in 1999. For further information related to environmental reclamation obligations, see Item 8. Note 18.

Our company is also subject to comprehensive environmental permit requirements, which are usually associated with new mining operations, although requirements vary widely from state to state and even within states. In some areas, land use regulations and associated permitting requirements are minimal. However, some states and local jurisdictions have very demanding requirements for permitting new mines. Environmental impact reports are sometimes required before a mining permit application can be considered for approval. These reports can take several years to complete. The report can include projected impacts of the proposed project on air and water quality, wildlife, noise levels, traffic, scenic vistas and other environmental factors. The reports generally include suggested actions to mitigate the projected adverse impacts. Nonetheless, we have been successful in obtaining mining and other land-use permits that provide for sufficient permitted reserves to support our operations. Individual permits applicable to our various operations are managed and tracked as they relate to the statuses of the application, modification, renewal, compliance and reporting procedures.

We regularly monitor and review our operations, which includes reviewing procedures and policies for compliance with our operating permits and related laws and regulations. We have incurred, and may incur in the future, significant operating and capital expenditures to comply with environmental laws and regulations. During 2024, we incurred $3.1 million related to compliance. Capital expenditures related to environmental compliance are anticipated to be $5.6 million in 2025, $9.1 million in 2026 and $9.4 million in 2027. These amounts do not include expenditures related to what may be ultimately determined with regard to the issues described previously for the Portland, Oregon, Harbor Superfund Site. Additionally, we have recorded asset retirement liabilities on our balance sheet related to the reclamation obligations for our mining activities.

We believe we are in compliance with all applicable environmental laws and regulations and that any existing non-compliance is not likely to have a material adverse effect on our results of operations. However, there can be no assurance that future compliance costs or liabilities associated with such laws and regulations or activities will not be significant.

Available Information

We file annual, quarterly and current reports, proxy statements and other information with the SEC. Our SEC filings are available to the public over the internet at the SEC’s website at https://www.sec.gov and on our website free of charge at https://www.kniferiver.com as soon as reasonably practicable after they are filed with or furnished to the SEC. Our website and the information contained on or connected to that site are not incorporated into this report.

12

Index

ITEM 1A. RISK FACTORS

Investing in our common stock involves a number of risks and uncertainties. The factors and other matters discussed herein are important factors that could cause actual results or outcomes to differ materially from those discussed in the forward-looking statements included elsewhere in this Annual Report. If any of the risks described below actually occur, our business, prospects, financial condition or financial results could be materially impacted and the trading price of our common stock could decline, and investors could lose all or part of their investment. The following are the most material risk factors applicable to us and are not necessarily listed in order of importance or probability of occurrence and not necessarily inclusive of all risks. We may also be subject to other risks or uncertainties not presently known or that are currently deemed to be immaterial but may materially adversely affect our business, prospects, financial condition, financial results or the trading price of our common stock in future periods.

Operations, Growth and Competitive Risks

We operate in a highly competitive industry.

We are subject to competition throughout the markets we serve as they are highly fragmented and we compete with a number of regional, national and international companies. These companies may have greater financial and other resources than us, while other competitors are smaller and more specialized, and concentrate their resources in particular areas of expertise. Our results are also affected by the number of competitors in a market, the production capacity that a particular market can accommodate, the pricing practices of other competitors and the entry of new competitors in a market. Significant competition could lead to lower prices, higher wages, lower sales volumes and higher costs, negatively affecting our financial condition, results of operations and liquidity.

In addition, construction materials and related contracting services are marketed under highly competitive conditions and are subject to competitive forces such as price, quality, service, delivery time and proximity to the customer. Our customers make competitive determinations based upon qualifications, experience, performance, reputation, technology, customer relationships, price, quality and ability to provide the relevant services in a timely, safe and cost-efficient manner. Increased competition may result in the inability to win bids for future projects and failure to effectively compete could negatively affect our results of operations, financial position and cash flows.

Furthermore, new acquisition opportunities may be subject to competitive bidding environments, which may increase the prices we pay to successfully grow our business through acquisitions.

We may not be able to secure, permit or economically mine strategically located aggregate reserves.

We must obtain governmental, environmental, mining, and/or other permits at many of our facilities. New quarry sites can take years to develop and in a number of states in which we operate it can be difficult to permit new aggregate sites or expand existing aggregate sites due to community resistance and regulatory requirements, among other things. In addition, construction aggregates are difficult to transport efficiently and freight costs can make certain deposits uneconomical to mine if located in areas of little growth or without the ability to supply growing markets served by rail or barge. Failure to secure, permit and mine such reserves could negatively impact our business, financial condition and results of operations.

Our business is seasonal and subject to weather conditions that could adversely affect our operations.

A majority of our business is seasonal, with results of operations affected by weather conditions. Construction materials production and related contracting services typically follow the activity in the construction industry, with heavier contracting services workloads in the spring, summer and fall. Extreme or unusually adverse weather conditions, which have occurred and may reoccur, such as extreme temperatures, heavy or sustained rainfall or snowfall, wildfires and storms may affect the demand for products and the ability to perform services on construction work. Unseasonably wet and/or cold weather in the states where we operate can delay the start or cause an early end to the construction season or cause temporary delays on specific projects, which can impact both our construction materials sales and contracting services revenues. We could also be impacted by drought conditions, which may restrict the availability of water supplies and inhibit the ability to conduct operations. As a result,

13

Index

extreme or unusually adverse weather conditions could negatively affect our results of operations, financial position and cash flows.

We are exposed to risk of loss resulting from the nonpayment and/or nonperformance of our customers and counterparties.

Our customers include public and private entities that have been, and may continue to be, negatively impacted by the economy. A recessionary construction economy can increase the likelihood that we will not be able to collect on all accounts receivable or may experience a delay in payment from some customers. If our customers or counterparties experience financial difficulties, which has occurred and may reoccur, we could experience difficulty in collecting receivables. While no one customer accounted for over 10 percent of our revenue in 2024 or 2023, we face collection risk as a normal part of business where we perform services and subsequently bill clients for such services. In the event that we have concentrated credit risk from customers in a specific geographic area or industry, negative trends or a worsening in financial conditions in that specific geographic area or industry, we could become more susceptible to disproportionately high levels of default. Nonpayment and/or nonperformance by our customers and counterparties could have a negative impact on our results of operations and cash flows.

Our success depends, in part, on our ability to execute on our acquisition strategy, to successfully integrate acquired businesses and to retain key employees of acquired businesses.

Our current geographic and asset footprint is the result of a deliberate acquisition growth strategy, which began in 1992 following our first aggregate company acquisition. Since then, we have acquired and integrated 90 complementary businesses, which have contributed significantly to our growth. Management continues to evaluate and pursue strategic acquisition opportunities as part of our ongoing growth strategy, such as the pending Acquisition. Management is unable to predict the timing or size of any future acquisitions. Potential risks associated with acquisitions, including the pending Acquisition, could include, among other things: our ability to identify attractive acquisitions; our ability to offer potential acquisition targets competitive transaction terms; our ability to raise additional equity and/or incur additional indebtedness, which could increase our leverage; regulatory approval; and reputational or other damage due to the prior conduct of an acquired company.

In addition, the investigation of potential acquisitions and the negotiation, drafting and execution of relevant agreements, disclosure documents, regulatory filings and other instruments require substantial management time and attention and costs for third-party consultants. If a proposed acquisition, including the pending Acquisition, is not completed for any reason, including events beyond our control, the costs incurred up to that point for the transaction likely would not be recoverable.

Acquisitions typically require integration of the acquired company’s project management, finance, information technology, risk management, purchasing, human resources and fleet management functions. We may be unable to successfully integrate an acquired business, such as the pending Acquisition, into our existing business, and an acquired business may not be as profitable as expected or at all. Acquisitions involve risks that the acquired business will not perform as expected and that the expectations concerning the value, strengths and weaknesses of the acquired business will prove incorrect. The inability to successfully integrate new businesses in a timely and orderly manner could increase costs and result in dis-synergies and negatively impact our results of operations and prevent us from realizing expected rates of return on the acquired business. Factors affecting the successful integration of an acquired business include, such as the pending Acquisition, but are not limited to, the following:

•Responsibility for certain liabilities of an acquired business, whether or not known, which could include, among other things, tax liabilities, product and other tort liabilities, breach of contract claims, environmental liabilities, permitting and regulatory compliance issues and liabilities for employment practices.

•Ability to retain local managers, key employees and customers who are important to the operations of the acquired business.

•Implementation of financial and management information systems, business practices and policies.

14

Index

•Conforming standards, controls, procedures and policies, business cultures and compensation structures among Knife River and the acquired company.

•Pursuit of multiple acquisition opportunities simultaneously.

•Unforeseen expenses, complications and delays, including difficulties in employing sufficient staff and maintaining operational and management oversight.

In addition, potential acquisitions may be in states in which we do not currently operate, which could result in unforeseen operating difficulties and difficulties in coordinating geographically dispersed operations, personnel and facilities.

Our results of operations from potential acquisitions could, in the future, result in impairment charges for any of the intangible assets, including goodwill, or other long‐lived assets, particularly if economic conditions worsen unexpectedly. As a result of these changes, our financial condition, results of operations and liquidity could be materially adversely affected. In addition, many of the businesses that we have acquired and may acquire have unaudited financial statements that have been prepared by the management of such companies and have not been independently reviewed or audited. We cannot assure that the financial statements of companies we have acquired or may acquire would not be materially different if such statements were independently reviewed or audited. If such statements were to be materially different, the tangible and intangible assets we acquire may be more susceptible to impairment charges, which could have a material adverse effect on our results of operations.

We cannot guarantee that we will continue to acquire businesses at valuations consistent with prior acquisitions or that we will complete future acquisitions at all. We also cannot know whether there will be attractive acquisition opportunities at reasonable prices or that financing will be available.

Technology disruptions or cyberattacks could adversely impact operations.

We use technology in substantially all aspects of our business operations and require uninterrupted operation of information technology and operation technology systems, including disaster recovery and backup systems and network infrastructure. These systems may be vulnerable to physical and cybersecurity failures or unauthorized access, due to: hacking, human error, theft, sabotage, malicious software, ransomware, third-party compromise, acts of terrorism, acts of war, acts of nature or other causes.

Should a compromise or system failure occur, interdependencies to technology may disrupt our ability to fulfill critical business functions. This may include interruption of facilities for delivery of construction materials or other products and services, any of which could adversely affect our reputation, business, cash flows and results of operations or subject us to legal costs.

Our accounting systems and our ability to collect information and invoice customers for products and services could be disrupted. If our operations are disrupted, it could result in decreased revenues and remediation costs that could adversely affect our results of operations and cash flows.

Through the ordinary course of business, we require access to sensitive customer, supplier, employee, financial and other data. A breach of our systems could compromise sensitive data and could go unnoticed for some time. Such an event could result in negative publicity and reputational harm, remediation costs, legal claims and fines that could have an adverse effect on our financial results. Third-party service providers that perform critical business functions for us or have access to sensitive information within Knife River also may be vulnerable to security breaches and information technology risks that could adversely affect us.

Cyberattacks continue to increase in frequency and sophistication, which could cause our information systems to be a target of ongoing and sophisticated cyberattacks by a variety of sources with the apparent aim to breach our cyber-defenses. Such incidents could have a material adverse effect on our business, financial condition or results of operations. Management is continuously reevaluating the need to upgrade and/or replace systems and network infrastructure. These upgrades and/or replacements could adversely impact operations by imposing increased costs, creating delays or outages, or creating difficulties transitioning to new systems. System disruptions, if not anticipated and appropriately mitigated, could adversely affect us.

15

Index

The SEC has adopted rules that require us to provide greater disclosures around cybersecurity risk management, strategy and governance, as well as to disclose the occurrence of material cybersecurity incidents. These rules and regulations may also require us to report a cybersecurity incident before we have been able to fully assess the impact or remediate the underlying issue. Efforts to comply with such reporting requirements could divert management’s attention from our incident response and could potentially reveal system vulnerabilities to threat actors. Failure to timely report incidents under these or other similar rules could also result in monetary fines, sanctions, or subject us to other forms of liability. This regulatory environment is increasingly challenging and may present material obligations and risks to our business, including significantly expanded compliance burdens, costs and enforcement risks.

While our insurance policies include liability coverage for certain of these matters, if we experience a significant security incident, we could be subject to liability or other damages that exceed our insurance coverage and we cannot be certain that such insurance policies will continue to be available to us on economically reasonable terms, or at all, or that any insurer will not deny coverage as to any future claim. The successful assertion of one or more large claims against us that exceed available insurance coverage, or the occurrence of changes in our insurance policies, including premium increases or the imposition of large deductible or co-insurance requirements, could have a material adverse effect on our results of operations, financial condition and cash flows.

Artificial intelligence presents risks and challenges that can impact our business by posing security risks to our confidential information, proprietary information and personal data.

Issues in the development and use of artificial intelligence, combined with an uncertain regulatory environment, may result in reputational harm, liability or other adverse consequences to our business operations. We have not yet incorporated artificial intelligence into our business processes or systems but may adopt and integrate generative artificial intelligence tools for specific use cases. Our vendors may incorporate generative artificial intelligence tools into their offerings without disclosing this use to us, and the providers of these generative artificial intelligence tools may not meet existing or rapidly evolving regulatory or industry standards with respect to privacy and data protection and may inhibit us or our vendors’ ability to maintain an adequate level of service and experience. If we, our vendors, or our third-party partners experience an actual or perceived breach of privacy or security incident because of the use of generative artificial intelligence, we may lose valuable intellectual property and confidential information and our reputation and the public perception of the effectiveness of our security measures could be harmed. Further, bad actors around the world use increasingly sophisticated methods, including the use of artificial intelligence, to engage in illegal activities involving the theft and misuse of personal information, confidential information and intellectual property. Any of these outcomes could damage our reputation, result in the loss of valuable property and information, and adversely impact our business.

We may be unable to protect our intellectual property, or may be alleged to have infringed upon the intellectual property rights of others, which could result in a loss of our competitive advantage and a diversion of resources.

Our efforts to protect our intellectual property rights may not be sufficient or effective to prevent misappropriation or infringement of our intellectual property, which could result in a loss of our competitive advantage. In addition, any of our intellectual property rights may be challenged, which could result in being declared invalid or unenforceable. We have, and may, litigate to protect our intellectual property from misappropriation or infringement by others, which could be expensive and cause a diversion of resources and ultimately may not be successful.

Moreover, competitors or other third parties may allege that we, or consultants or other third parties retained or indemnified by us, infringe on their intellectual property rights. The potential risks and uncertainties of intellectual property-related litigation and an assertion of an infringement claim against us may cause us to spend significant amounts to defend the claim, and possibly pay significant monetary damages. In the event of a settlement or adverse judgment, our results of operations may materially decline if we are prohibited from using the relevant intellectual property, especially if we are required to pay to the alleged owner of the relevant intellectual property licensing fees, royalties or damages. Even in instances where we believe that claims and allegations of intellectual property infringement against us are without merit, defending against such claims may be time consuming and expensive and may result in the diversion of time and attention of our management and employees.

16

Index

Pandemics, including COVID-19, may have a negative impact on our business operations, revenues, results of operations, liquidity and cash flows.

Pandemics have disrupted national, state and local economies. To the extent a pandemic adversely impacts our businesses, operations, revenues, liquidity or cash flows, it could also have a heightened effect on other risks described in this section. The degree to which a pandemic will impact us depends on future developments, including the resurgence of COVID-19 and its variants, federal and state mandates, actions taken by governmental authorities, effectiveness of vaccines being administered, and the pace and extent to which the economy recovers and remains under relatively normal operating conditions.

Other factors associated with a pandemic that could impact our businesses and future operating results, revenues and liquidity include impacts related to the health, safety, and availability of employees and contractors; extended rise in unemployment; public and private-sector budget changes and constraints; counterparty credit; costs and availability of supplies; capital construction and infrastructure operation and maintenance programs; financing plans; pension valuations; travel restrictions; and legal matters. The economic and market disruptions resulting from a pandemic could also lead to greater than normal uncertainty with respect to the realization of estimated amounts, including estimates for backlog, revenue recognition, intangible assets, other investments and provisions for credit losses.

Economic and Political Risks

Significant changes in prices for commodities, labor, or other production and delivery inputs could negatively affect our businesses.

Our operations are exposed to fluctuations in prices for labor, energy-related products, cement, asphalt cement, fuel, raw materials and utilities, among other things. Prices are generally subject to change in response to fluctuations in supply and demand and other general economic and market conditions beyond our control. The global political environment is a primary driver in price changes to commodities and inputs out of our control. In recent years, we have experienced elevated commodity and supply chain costs including the costs of labor, raw materials, energy-related products and other inputs used in the production and distribution of our products and services. During the years 2023 and 2022, inflationary pressures significantly increased the cost of raw materials by greater than 10 percent in comparison to average historical increases of approximately 3 percent.

High energy prices, specifically for diesel fuel, natural gas and liquid asphalt, have impacted and could affect the margins realized, as well as demand for construction materials and related contracting services. Increased labor costs, due to labor shortages, competition from other industries, or other factors, could also negatively affect our results of operations. Due to their size and weight, aggregates are costly to transport efficiently. Our products and services are generally localized around our aggregate sites and served by truck or in certain markets by rail or barge. We could be negatively impacted by freight costs due to rising fuel costs; rate increases for third-party freight; truck, railcar or barge shortages, including shortages of truck drivers and rail crews; rail service interruptions; and minimum tonnage requirements, among other things. To the extent price increases or other mitigating factors are not sufficient to offset these increased costs adequately or timely, and/or if the price increases result in a significant decrease in sales volumes, our results of operations, financial position and cash flows could be negatively impacted.

Supply chain disruptions may adversely affect our operations.

At times or in certain markets, we rely on third-party vendors and manufacturers to supply or transport many of the materials necessary for our operations. Disruptions, shortages or delays in the transportation of materials; price increases from suppliers or manufacturers; or inability to source needed materials have occurred and may continue to occur, which could adversely affect our results of operations, financial condition, cash flows and harm customer relationships. Further, supply chain disruptions can occur from events out of our control such as fires, floods, severe weather, natural disasters, environmental incidents or other catastrophes. National and regional demand for cementitious and liquid asphalt may at times outpace the supply in the market. This imbalance creates a temporary shortage which may cause prices to increase faster than downstream products. Any material disruption at our facilities or those of our customers or suppliers or otherwise within our supply chain, whether as a result of downtime, work stoppages or facility damage, could prevent us from meeting customer demands or expected

17

Index

timelines, require us to incur unplanned capital expenditures, or cause other material disruptions to our operations, any of which could have a material adverse effect on our operations, financial position and cash flows.

Our business is based in large part on government-funded infrastructure projects and building activities, and any reductions or reallocation of spending or related subsidies in these areas could have an adverse effect on us.

Certain of our businesses depend on government spending for infrastructure and other similar building activities. As a result, demand for some of our products is influenced by local, state and federal government fiscal policies, tax incentives and other subsidies, and other general macroeconomic and political factors. Projects in which we participate may be funded directly by governments or privately funded, but are otherwise tied to or impacted by government policies and spending measures.

Government spending is often approved only on a short-term basis and some of the projects in which our products are used require longer-term funding commitments. If government funding is not approved or funding is lowered as a result of poor economic conditions, lower than expected revenues, competing spending priorities, or other factors, it could limit infrastructure projects available, increase competition for projects, result in excess inventory, and decrease sales, all of which could adversely affect the financial condition of our business.

Additionally, certain regions or states may require or possess the means to finance only a limited number of large infrastructure projects and periods of high demand may be followed by years of little to no activity. There can be no assurances that governments will sustain or increase current infrastructure spending and tax incentive and other subsidy levels, and any reductions thereto or delays therein could affect our business, liquidity and financial condition, and results of operations.

Economic volatility affects our operations, as well as the demand for our products and services.

Unfavorable economic conditions can negatively affect the level of public and private expenditures on projects and the timing of these projects which, in turn, can negatively affect demand for our products and services. The level of demand for construction materials and contracting services could be adversely impacted by the economic conditions in the industries and market areas we serve, as well as in the general economy. Local, state and federal budget limitations also affect the funding available for infrastructure spending, which could have an adverse impact on our earnings and results of operations.

Legal and Regulatory Compliance Risks

We may be negatively impacted by pending and/or future litigation, claims or investigations.

We are and/or may become party to, among other things, personal injury, environmental, commercial, contract, warranty, antitrust, tax, property entitlements and land use, product liability, health and safety, and employment claims. The outcome of pending or future lawsuits, claims, investigations or proceedings is often difficult to predict and could be adverse and material in amount. In addition to the monetary cost, litigation can divert management’s attention from our core business opportunities. Development of new information in these matters can often lead to changes in management’s estimated liabilities associated with these proceedings including the judge’s rulings or judgements, jury verdicts, settlements or changes in applicable law. The outcome of such matters is often difficult to predict, and unfavorable outcomes could have a material impact to our results of operations, financial position and cash flows.

Unexpected factors affecting self-insurance claims and reserve estimates could adversely affect us.

We use a combination of insurance and self-insurance to provide for potential liabilities for workers’ compensation, general liability, vehicle accident, property and medical benefit claims. Historical claims experience, demographic and severity factors and other actuarial assumptions are subject to a high degree of variability and are used to estimate the liabilities associated with the risks retained by us. Among the causes of this variability are unpredictable external factors affecting future inflation rates, litigation trends, legal interpretations, benefit level changes, medical stop loss coverage and claim settlement patterns. A significant change in external factors could have a material impact to our financial position and liquidity.

18

Index

Our operations could be negatively impacted by import tariffs and/or other government mandates.

We operate in or provide services to capital-intensive industries in which federal trade policies could significantly impact the availability and cost of materials. Imposed and proposed tariffs could significantly increase the prices and delivery lead times on raw materials and finished products that are critical to us and our customers, such as cement and steel, among other things. We face competition from manufacturers both in the United States and around the world, some of which may engage in competition and trade practices involving the importation of competing products in the United States or other foreign laws, regulations or practices. Prolonged lead times on the delivery of raw materials and further tariff increases on raw materials and finished products could adversely affect our business, financial condition and results of operations.

For example, in February 2025, the current United States presidential administration imposed tariffs on foreign imports into the United States, which may negatively impact our results of operations if such tariffs are not suspended or revoked. At this time, it remains unclear what additional actions, if any, will be taken by the United States or other governments with respect to international trade agreements, the imposition of additional tariffs on goods imported into the United States, tax policy related to international commerce, increased export control, sanctions and investment restrictions, or other trade matters. Other effects of these changes, including impacts on the price of raw materials, responsive or retaliatory actions from governments and the opportunity for competitors not subject to such changes to establish a presence in markets where we participate, could also have significant impacts on our results of operations, though whether any of the foregoing actions will be taken remains unclear. Furthermore, we may not be able to increase prices enough to offset the impact of tariffs, which could negatively impact our margins. If we raise prices in response to tariffs, the demand for our products and services may decrease, which could also have a negative impact on our revenue. We cannot predict what further action may be taken with respect to export restrictions, tariffs or trade relations between the United States and other governments. Any further changes in the United States or international trade policy could have an adverse impact on our business, financial condition and results of operations.

Our operations are subject to environmental laws and regulations that may increase costs, impact or limit business plans, or expose us to environmental liabilities.

We are subject to environmental laws and regulations affecting many aspects of our operations, including air and water quality, wastewater discharge, the generation, transportation and disposal of solid waste and hazardous substances, aggregate permitting and other environmental considerations. These laws and regulations can increase capital, operating and other costs; cause delays as a result of litigation and administrative proceedings; and create environmental compliance, remediation, containment, monitoring and reporting obligations for construction materials facilities. Environmental laws and regulations can also require us to install pollution control equipment at our facilities, clean up spills and other contamination, and correct environmental hazards, including payment of all or part of the cost to remediate sites where we had past activities, or the activities of other parties, caused environmental contamination. These laws and regulations generally require us to obtain and comply with a variety of environmental licenses, permits, inspections and other approvals. Although we strive to comply with all applicable environmental laws and regulations, public and private entities and private individuals may interpret our legal or regulatory requirements differently and seek injunctive relief or other remedies against us. We cannot predict the outcome, financial or operational, of any such litigation or administrative proceedings.

Existing environmental laws and regulations may be revised and new laws and regulations seeking to protect the environment may be adopted or become applicable to us. These laws and regulations could require us to limit the use or output of certain facilities; restrict the use of certain fuels; prohibit or restrict new or existing services; replace certain fuels with renewable fuels; retire and replace certain facilities and equipment; install pollution controls; remediate environmental impacts; remove or reduce environmental hazards; or forego or limit the development of resources. Revised or new laws and regulations that increase compliance and disclosure costs and/or restrict operations could adversely affect our results of operations and cash flows.

19

Index

Our operations could be adversely impacted by severe weather events, including as a result of climate change.

Severe weather events, such as tornadoes, hurricanes, rain, drought, ice and snowstorms, and high- and low- temperature extremes, occur in regions in which we operate and maintain infrastructure. Climate change could change the frequency and severity of these weather events, which may create physical and financial risks. Such risks could have an adverse effect on our financial condition, results of operations and cash flows. Increases in severe weather conditions or extreme temperatures may cause infrastructure construction projects to be delayed or canceled and limit resources available for such projects resulting in decreased revenue or increased project costs. In addition, drought conditions could restrict the availability of water supplies or limit the ability to obtain water use permits, inhibiting the ability to conduct operations. To date, we have not experienced any material impacts to our financial condition, results of operations or cash flows due to the physical effects of climate change.

Climate change may impact a region’s economic health, which could impact its revenues. Our financial performance is tied to the health of the regional economies served where we provide construction materials and services. Increases in severe weather events or significant changes in temperature and precipitation patterns could adversely affect the economies of the states and communities we serve.

The insurance industry has been and may be adversely affected by severe weather events, which may impact availability of insurance coverage, insurance premiums and insurance policy terms.

The price of energy also has an impact on the economic health of communities. The cost of additional regulatory requirements related to climate change, such as regulation of carbon dioxide emissions under the federal Clean Air Act, requirements to replace fossil fuels with renewable energy or to obtain emissions credits, or other environmental regulation or taxes could impact the availability of goods and the prices charged by suppliers, which would normally be borne by consumers through higher prices for energy and purchased goods, and could adversely impact economic conditions of areas served by us. To the extent financial markets view climate change and emissions of GHG as a financial risk, this could negatively affect our ability to access capital markets or result in less competitive terms and conditions.

Public concern over climate change has resulted in, and may continue to result in, new or increased regional, federal and global legal and regulatory requirements, including taxation, to reduce or mitigate carbon emissions and to limit or impose additional costs on hydrocarbon and water usage or other climate-related objectives. In October 2023, California passed two climate disclosure bills (SB 253 - Climate Corporate Accountability Act and SB 261 - Climate-Related Financial Risk Act) that will require disclosure from both public and private entities that do business in the state of California. SB 253 mandates reporting entities to disclose Scope 1, Scope 2 and Scope 3 GHG emissions. SB 261 mandates reporting companies to disclose climate risk reports. Both California laws are set to take effect in 2026. We may experience increases to our costs of operation to comply with new regulatory requirements due to investments in facilities and equipment or the relocation of our facilities. If we or our suppliers are required to comply with these laws and regulations, or if we choose to take additional voluntary steps to reduce or mitigate our impact on the climate, we may experience increased costs for energy, production, transportation, and raw materials, increased capital expenditures, or increased insurance premiums and deductibles, each of which could adversely impact our operations. In particular, proposed, new or inconsistent regulation and taxation of fuel and energy could increase the cost of complying with such laws and regulations as well as the cost of operation, including fuel required to operate our facilities or transport and distribute our products, thereby increasing the distribution and supply chain costs associated with our products. Any assessment of the potential impact of future climate change legislation, regulations or industry standards, as well as any international treaties and accords, is uncertain given the wide scope of potential regulatory change in the jurisdictions in which we operate.

Beyond the commercial pressures implicated by climate change concerns, our operations may face potential adverse physical effects. In August of 2023, Hawaii experienced a series of wildfires across the island of Maui which impacted our operations, however, not materially. If any of our properties and facilities experience a significant operational disruption or catastrophic loss due to the increased frequency or the severity of natural disasters or severe weather events, it could delay or disrupt production, shipments, and revenue, and result in potentially significant expenses to repair or replace these properties, which may negatively affect our business and financial results.

20

Index

Stakeholder actions and increased regulatory activity related to environmental and other sustainability matters, particularly climate change and reducing GHG emissions, as well as human capital practices and policies, could adversely impact our operations, costs of or access to capital and impact or limit business plans.

We could face stakeholder scrutiny related to environmental and other sustainability matters as well as human capital practices and policies. There has been an increased focus from stakeholders and regulators related to these matters across all industries in recent years, with investors (including institutional investors), activists, proxy advisory firms, customers, employees and lenders, placing increasing importance on the impacts and social cost associated with climate change as well as these types of practices and policies of companies, including sustainability performance and risk mitigation efforts. There is also risk that we could be perceived as, or accused of, “greenwashing,” i.e., the process of conveying misleading information or making false claims that overstate potential benefits, which could lead to reputational harm. Investors (including institutional investors), activists, proxy advisory firms, customers, employees and lenders, may also require us to implement sustainability and/or human capital responsibility procedures or standards before they continue to do business with us. In addition, some investors use these criteria to guide their investment strategies, and may not invest in us, or divest their holdings of us, if they believe our policies on these topics are inadequate or, on the other hand, have a negative response to such policies. Our various stakeholders or regulators may also have divergent opinions on these types of matters as well as conflicting expectations regarding our culture, values, goals and business, which makes it difficult to achieve a consistently positive perception amongst all of our various stakeholders. Moreover, we may determine that it is in the best interest of our company and our stockholders to prioritize other investments over the achievement of our current goals based on economic, technological developments, regulatory and social factors, business strategy or pressure from investors, activists, or other stakeholders.

Concern that GHG emissions contribute to global climate change has led to international, federal, state and local legislative and regulatory proposals to reduce or mitigate the effects of GHG emissions. We monitor, analyze and report GHG emissions from our operations. We will continue to monitor GHG regulations and their potential impact on operations.

Due to the uncertain availability of technologies to control GHG emissions and the unknown obligations that potential GHG emission legislation or regulations may create, we cannot determine the potential financial impact on our operations. We may experience significant future cost increases associated with regulatory compliance for sustainability matters, including fees, licenses, reporting, auditing, and the cost of capital improvements for our operating facilities to meet sustainability and/or environmental regulatory requirements.

In addition, the increasing focus on climate change and stricter regulatory requirements may result in us facing adverse reputational risks associated with certain of our operations producing GHG emissions. If we are unable to satisfy the increasing climate-related expectations of certain stakeholders, we may suffer reputational harm, which may cause our stock price to decrease or difficulty in accessing the capital or insurance markets. Such efforts, if successfully directed at us, could increase the costs of or access to capital or insurance and interfere with business operations and the ability to make capital expenditures.

Changes in tax law may negatively affect our business.

Changes to federal, state and local tax laws have the ability to benefit or adversely affect our earnings and customer costs. For instance, the expiration of certain United States Tax Cuts and Jobs Act provisions in 2026 and ongoing global adoption of minimum tax rules may increase our tax burden and operational complexity. The current United States presidential administration and Congress are actively considering various policy choices which may have the impact of changing, possibly materially, how we are taxed in the future compared to how we are taxed today and potentially in comparison to our competitors. Significant changes to corporate tax rates could result in the impairment of deferred tax assets that are established based on existing law at the time of deferral. A number of factors may increase our future effective income tax rate, including: governmental authorities increasing taxes or eliminating deductions, particularly the depletion deduction the mix of earnings from depletable versus non-depletable businesses, the jurisdictions in which earnings and/or revenues are taxed, the resolution of issues arising from tax audits with various tax authorities, changes in the valuation of our deferred tax assets and liabilities, adjustments to estimated taxes upon finalization of various tax returns, changes in available tax credits, changes in

21

Index

stock-based compensation, other changes in tax laws and the interpretation of tax laws and/or administrative practices.

Human Capital Risks

Our operations may be negatively affected if we are unable to obtain, develop and retain key personnel and skilled labor forces.

We must attract, develop and retain executive officers and other professional, technical and labor forces with the skills and experience necessary to successfully manage, operate and grow. Competition for these employees is high, due in part to changing workforce demographics, a shortage of younger employees who are qualified to replace employees as they retire, seasonality, and remote work opportunities, among other things. In some cases, competition for these employees is on a regional or national basis. At times of low unemployment, it can be difficult for us to attract and retain qualified and affordable personnel. A shortage in the supply of skilled personnel creates competitive hiring markets, increased labor expenses, decreased productivity and potentially lost business opportunities to support our operating and growth strategies. Additionally, if we are unable to hire employees with the requisite skills, we may be forced to incur significant training expenses. As a result, our ability to maintain productivity, relationships with customers, competitive costs, and quality services is limited by the ability to employ, retain and train the necessary skilled personnel and could negatively affect our results of operations, financial position and cash flows.

It is also critical to develop and train employees, hire new qualified personnel, and successfully manage the short and long-term transfer of critical knowledge and skills, including leadership development and succession planning throughout our company. The loss of key personnel, coupled with an inability to adequately train other personnel, hire new personnel or transfer knowledge and skills, could significantly impact our ability to perform under our contracts and execute on new or growing training programs.

Additionally, approximately 12 percent of our workforce is comprised of employees that are covered by collective bargaining agreements with various unions. If we encounter difficulties with renegotiations or renewals of collective bargaining arrangements or are unsuccessful in those efforts, we could incur additional costs and experience work stoppages. Union actions at suppliers also can affect us. Any delays or work stoppages could adversely affect the ability to perform under contracts, which could negatively impact our results of operations, cash flows and financial condition.

Increasing costs associated with health care plans may adversely affect our results of operations.

We are primarily self-insured for the health care benefits for eligible employees. Health care costs may continue to increase if overall total health care claims increase and could have an adverse impact on operating results, financial position and liquidity, particularly if we cannot continue to carry stop loss insurance. Legislation related to health care could also change our benefit program and costs.

Financial and Accounting Risks

Aggregate resource and reserve calculations are estimates and subject to uncertainty.

We estimate aggregate reserves and resources based on available data. The estimates depend upon the interpretation of surface and subsurface investigations, major assumptions and other supporting data, which can be unpredictable. The quantity and quality must be considered as only an estimate until reserves are actually extracted and processed. This uncertainty in aggregate resource and reserve calculations may adversely impact our results of operations.

Backlog may not accurately represent future revenue and gross margin.

Backlog consists of the uncompleted portion of services to be performed under job-specific contracts. Contracts are subject to delay, default or cancellation, and contracts in our backlog are subject to changes in the scope of services to be provided, as well as adjustments to the costs relating to the applicable contracts. Backlog may also be affected by project delays or cancellations resulting from weather conditions, external market factors and economic

22

Index

factors beyond our control, among other things. Accordingly, there is no assurance that backlog will be realized. The timing of contract awards and duration of large new contracts can significantly affect backlog. Backlog at any given point in time may not accurately represent the revenue or margin that is realized in any period. Also, the backlog as of the end of the year may not be indicative of the revenue and gross margin expected to be earned in the following year and should not be relied upon as a stand-alone indicator of our future financial results.

We operate in a capital-intensive industry and are subject to capital market and interest rate risks.

Our operations require significant capital investment to purchase and maintain the property and equipment required to mine and produce our products. In addition, our operations include a significant level of fixed and semi-fixed costs. Consequently, we rely on capital markets, particularly in the first half of the year due to the seasonal nature of the industry, as sources of liquidity for capital requirements not satisfied by cash flows from operations. If we are unable to access capital at competitive rates, the ability to implement business plans, make capital expenditures or pursue acquisitions we would otherwise rely on for future growth may be adversely affected. Market disruptions may increase the cost of borrowing or adversely affect our ability to access one or more financial markets. Higher interest rates on borrowings have impacted and could further impact our results of operations. Such market disruptions could include: a significant economic downturn, financial distress of unrelated industry leaders in the same line of business, deterioration in capital market conditions, turmoil in the financial services industry, volatility in commodity prices, pandemics, terrorist attacks, acts of war, and cyberattacks, among other things.

The debt capital market environment could impact our ability to borrow money in the future. Additional financing or refinancing might not be available and, if available, may not be at economically favorable terms. Further, an increase in our leverage could lead to deterioration in our credit ratings. A downgrade in our credit ratings, regardless of the cause, could also limit the ability to obtain additional financing and/or increase the cost of obtaining financing. There is no guarantee we will be able to access the capital markets at financially economical interest rates, which could negatively affect our business. We are also exposed to interest rate volatility risk on our variable rate debt as changes in central bank federal policies, as well as macro-economic factors, impact interest rates. While we believe we will continue to have adequate credit available to meet our needs, there can be no assurance of that.

We may be required to obtain financing in order to fund certain strategic acquisitions, if they arise, such as the pending Acquisition, or to refinance outstanding debt. It is possible a large strategic acquisition would require us to issue new equity and other debt and could result in a ratings downgrade notwithstanding our issuance of equity securities to fund the transaction. We are also exposed to credit market risk, through the interest payable on any variable-rate debt, including the interest cost on future borrowings under our credit facilities.

Financial market changes could impact our defined benefit pension plans and obligations.

We have two frozen defined benefit pension plans for certain current and former employees. Assumptions regarding future costs, returns on investments, interest rates and other actuarial assumptions have a significant impact on the funding requirements and expense recorded relating to these plans.

Adverse changes in economic indicators, such as consumer spending, inflation data, interest rate changes, political developments and threats of terrorism, among other things, can create volatility in the financial markets. These changes could impact the assumptions and negatively affect the value of assets held in our pension plans and may increase the amount and accelerate the timing of required funding contributions for those plans.

Costs related to obligations under MEPPs could have a material negative effect on our results of operations and cash flows.

We participate in MEPPs for employees represented by certain unions. We are required to make contributions to these plans in amounts established under numerous collective bargaining agreements between our operating subsidiaries and those unions.

We may be obligated to increase our contributions to underfunded plans that are classified as being in endangered, seriously endangered or in critical status as defined by the Pension Protection Act of 2006. Plans

23

Index

classified as being in one of these statuses are required to adopt Rehabilitation Plans or Funding Improvement Plans to improve their funded status through increased contributions, reduced benefits or a combination of the two.

We may also be required to increase our contributions to MEPPs if the other participating employers in such plans withdraw from the plans and are not able to contribute amounts sufficient to fund the unfunded liabilities associated with their participation in the plans. The amount and timing of any increase in our required contributions to MEPPs may depend upon one or more factors, including the outcome of collective bargaining; actions taken by trustees who manage the plans; actions taken by the plans’ other participating employers; the industry for which contributions are made; future determinations that additional plans reach endangered, seriously endangered or critical status; newly enacted government laws or regulations and the actual return on assets held in the plans; among others. We could experience increased operating expenses as a result of required contributions to MEPPs, which could have an adverse effect on our results of operations, financial position or cash flows.

In addition, pursuant to the Employee Retirement Income Security Act of 1974, as amended by the Multiemployer Pension Plan Amendments Act, we could incur a partial or complete withdrawal liability upon withdrawing from a plan, exiting a market in which it does business with a union workforce or upon termination of a plan. We could also incur additional withdrawal liability if our withdrawal from a plan is determined by that plan to be part of a mass withdrawal.

We have substantial indebtedness and may incur substantial additional indebtedness, which could adversely affect our business, profitability and our ability to meet obligations.

We had $690.0 million in aggregate principal amount of indebtedness outstanding as of December 31, 2024. Such indebtedness consists of $425 million 7.75% notes due 2031, $265 million in aggregate principal amount of term loans and a $350 million revolving credit facility, under which we had no aggregate principal amount of loans outstanding as of December 31, 2024. In addition, in the first half of 2025 we expect to enter into a new senior secured Term Loan B facility of $500 million, increase the total commitments under our existing revolving credit facility from $350 million to $500 million and extend the maturity date of our existing senior secured credit facilities from 2028 to 2030.

This amount of debt could potentially have important consequences to us and our investors, including:

•Requiring a substantial portion of our cash flow from operations to make interest payments on this debt.

•Making it more difficult to satisfy debt service and other obligations.

•Increasing the risk of a future credit ratings downgrade of our debt, which could increase future debt costs and limit the future availability of debt financing.

•Increasing our vulnerability to general adverse economic and industry conditions.

•Reducing the cash flow available to fund capital expenditures and other corporate purposes and to grow our business.

•Limiting our flexibility in planning for, or reacting to, changes in our business and the industry.

•Placing us at a competitive disadvantage relative to our competitors that may not be as highly leveraged with debt.

•And limiting our ability to borrow additional funds as needed or take advantage of business opportunities as they arise, pay cash dividends or repurchase ordinary shares.

In addition, our actual cash requirements in the future may be greater than expected and our cash flow from operations may not be sufficient to repay all of the outstanding debt as it becomes due. Further, we may not be able to borrow money, sell assets or otherwise raise funds on acceptable terms, or at all, to refinance our debt.

24

Index

Despite our current level of indebtedness, we may be able to incur substantially more debt, which could increase the risks to our financial condition described above.

We may be able to incur substantial additional indebtedness in the future, such as the debt we plan to incur to finance the Acquisition in part. Although certain of the agreements governing our existing indebtedness contain restrictions on the incurrence of additional indebtedness and entering into certain types of other transactions, these restrictions are subject to a number of qualifications and exceptions, including compliance with various financial conditions. Additional indebtedness incurred in compliance with our existing debt instruments could be substantial. To the extent new debt is added to our current debt levels, the leverage risks described in the immediately preceding risk factor would increase. The foregoing risks would also apply to the credit agreement governing the Term Loan B facility we expect to enter into upon consummation of the Acquisition.

A lowering or withdrawal of the ratings, outlook or watch assigned to us or our debt by rating agencies may increase our future borrowing costs and reduce our access to capital.

The rating, outlook or watch assigned to us or our debt could be lowered or withdrawn entirely by a rating agency if, in that rating agency’s judgment, current or future circumstances relating to the basis of the rating, outlook, or watch such as adverse changes to our business, so warrant. Our credit ratings may also change as a result of the differing methodologies or changes in the methodologies used by the rating agencies. Any future lowering of our debt’s ratings, outlook or watch likely would make it more difficult or more expensive for us to obtain additional debt financing.

Separation Risks

We have minimal history of operating as an independent, public company, and our historical financial information is not necessarily representative of the results that we would have achieved as a separate, publicly traded company and may not be a reliable indicator of our future results.

The historical information included in this Annual Report refers to our business (i) as operated by and integrated with MDU Resources for periods prior to the Separation and (ii) as a stand-alone company for the period after the Separation. The historical financial information included in this Annual Report is derived from the audited consolidated financial statements and accounting records of MDU Resources and us. Accordingly, the historical financial information included in this Annual Report does not necessarily reflect the financial condition, results of operations and cash flows that we would have achieved as a separate, publicly traded company during the periods presented prior to the Separation or those that we will achieve in the future, primarily as a result of the factors described below:

•Prior to the Separation, our business was operated by MDU Resources as part of its broader corporate organization, rather than as an independent company, and MDU Resources or one of its affiliates performed certain corporate functions for us. Our historical results reflect allocations of corporate expenses from MDU Resources for such functions prior to the Separation, which are likely to be less than the expenses we would have incurred had we operated as a separate publicly traded company.

•Prior to the Separation, we shared economies of scope and scale in costs, employees and vendor relationships. Although we entered into a transition services agreement with MDU Resources following the Separation, these arrangements may not retain or fully capture the benefits that we had enjoyed as a result of being integrated with MDU Resources and may result in paying higher charges than in the past for these services. This could have a material adverse effect on our business, financial position, results of operations and cash flows as a stand-alone company.

•Generally, our working capital requirements and capital for our general corporate purposes, including acquisitions and capital expenditures, had, prior to the Separation, been satisfied as part of the corporate-wide cash management policies of Centennial. Following the Separation, our results of operations and cash flows are now likely to be more volatile, and we may need to obtain additional financing from banks, through public offerings or private placements of debt or equity securities, strategic relationships or other arrangements, which may or may not be available and may be more costly.

25

Index

•The cost of capital for our business as a stand-alone company may be higher than MDU Resources’ cost of capital prior to the Separation.

•As a public company, we are subject to the reporting requirements of the Exchange Act, the Sarbanes-Oxley Act and the Dodd-Frank Act and is required to prepare our financial statements according to the rules and regulations required by the SEC. Complying with these requirements has resulted in significant costs and could require us to divert substantial resources, including management time, from other activities.

Other significant changes have occurred in our cost structure, management, financing and business operations as a result of operating as a company separate from MDU Resources. For additional information about the past financial performance of our business and the basis of presentation of the historical audited consolidated financial statements, see “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and “Item 8 - Financial Statements and Supplementary Data.”

If the Separation, together with certain related transactions, does not qualify as a transaction that is generally tax-free for United States federal income tax purposes, we could be subject to significant tax liabilities and, in certain circumstances, we could be required to indemnify MDU Resources for material taxes and other related amounts pursuant to indemnification obligations under the tax matters agreement.

In connection with the Separation, MDU Resources received a private letter ruling from the IRS and one or more opinion(s) of its tax advisors, regarding certain United States federal income tax matters relating to the Separation and the Distribution. The IRS private letter ruling was based upon and relied on, and the opinion(s) of tax advisors was based upon and relied on, among other things, various facts and assumptions, as well as certain representations, statements and undertakings of MDU Resources and Knife River, including those relating to the past and future conduct of MDU Resources and Knife River. If any of these representations, statements or undertakings is, or becomes, inaccurate or incomplete, or if MDU Resources or Knife River breach any of the representations or covenants contained in any of the Separation-related agreements and documents or in any documents relating to the IRS private letter ruling and/or the opinion(s) of tax advisors, the IRS private letter ruling and/or the opinion(s) of tax advisors may be invalid and the conclusions reached therein could be jeopardized.

Notwithstanding receipt by MDU Resources of the IRS private letter ruling and the opinion(s) of tax advisors, the IRS could determine that the Separation and/or certain related transactions should be treated as taxable transactions for United States federal income tax purposes if it determines that any of the representations, assumptions, or undertakings upon which the IRS private letter ruling or the opinion(s) of tax advisors were based are false or have been violated. In addition, the IRS private letter ruling does not address and the opinion(s) of tax advisors do not address all of the issues that are relevant to determining whether the Separation, together with certain related transactions, qualifies as a transaction that is generally tax-free for United States federal income tax purposes. Further, the opinion(s) of tax advisors represent the judgment of such tax advisors and are not binding on the IRS or any court, and the IRS or a court may disagree with the conclusions in the opinion(s) of tax advisors. Accordingly, notwithstanding receipt by MDU Resources of the IRS private letter ruling and the opinion(s) of tax advisors, there can be no assurance that the IRS will not assert that the Separation and/or certain related transactions do not qualify for tax-free treatment for United States federal income tax purposes or that a court would not sustain such a challenge. In the event the IRS were to prevail in such challenge, MDU Resources, Knife River and MDU Resources stockholders could be subject to significant United States federal income tax liability.

If the Separation, together with related transactions, were to fail to qualify as a transaction that is generally tax-free for United States federal income tax purposes under Sections 355 and 368(a)(1)(D) of the Internal Revenue Code, in general, for United States federal income tax purposes, MDU Resources would recognize taxable gain as if it had sold Knife River common stock in a taxable sale for its fair market value, and MDU Resources stockholders who receive such Knife River shares in the distribution would be subject to tax as if they had received a taxable distribution equal to the fair market value of such shares.

Under the tax matters agreement, we may be required to indemnify MDU Resources against any additional taxes and related amounts resulting from the Separation (and any related costs and other damages) to the extent such amounts resulted from (a) an acquisition of all or a portion of its equity securities or assets, whether by merger or otherwise (and regardless of whether we participated in or otherwise facilitated the acquisition), (b) other actions or

26

Index

failures to act by us or (c) any inaccuracy or breach of our representations, covenants or undertakings contained in any of the Separation-related agreements and documents or in any documents relating to the IRS private letter ruling and/or the opinion(s) of tax advisors. Any such indemnity obligations could be material.

United States federal income tax consequences may restrict our ability to engage in certain desirable strategic or capital-raising transactions after the Separation.

Under current law, a separation can be rendered taxable to the parent corporation and its stockholders as a result of certain post-separation acquisitions of shares or assets of the spun-off corporation. For example, a separation may result in taxable gain to the parent corporation under Section 355(e) of the Internal Revenue Code if the Separation were deemed to be part of a plan (or series of related transactions) pursuant to which one or more persons acquire, directly or indirectly, shares representing a 50 percent or greater interest (by vote or value) in the spun-off corporation.

To preserve the United States federal income tax treatment of the Separation, and in addition to our indemnity obligation described below, the tax matters agreement restricts us, for the two-year period following the distribution, except in specific circumstances, from:

•Entering into any transaction pursuant to which all or a portion of our common stock or assets would be acquired, whether by merger or otherwise.

•Issuing equity securities beyond certain thresholds.

•Repurchasing shares of our capital stock other than in certain open-market transactions.

•Ceasing to actively conduct certain aspects of our business.

•And/or taking or failing to take any other action that would jeopardize the expected United States federal income tax treatment of the distribution and certain related transactions.

These restrictions may limit our ability to pursue certain strategic transactions or other transactions that it may believe to be in the best interests of its stockholders or that might increase the value of our business.

We may not achieve some or all of the expected benefits of the Separation, and the Separation may materially and adversely affect our financial position, results of operations and cash flows.

We may be unable to achieve the full strategic and financial benefits expected to result from the Separation, or such benefits may be delayed or not occur at all for a variety of reasons, including, among others, that: (a) management may be required to spend significant amounts of time and effort on post Separation activities, which may divert management’s attention from operating and growing our business; (b) we may be more susceptible to market fluctuations and other adverse events than if it was still a part of MDU Resources; (c) our business is less diversified than MDU Resources’ business prior to the Separation; and (d) the other actions required to separate MDU Resources’ and our respective businesses could disrupt our operations. If we fail to achieve some or all of the benefits expected to result from the Separation, or if such benefits are delayed, it could have a material adverse effect on our financial position, results of operations and cash flows.

Shareholder Risks

The trading market for our common stock has existed only a short period, and the market price and trading volume of our common stock may fluctuate significantly.

The trading price of our common stock has been and may continue to be volatile and the trading volume may fluctuate and cause significant price variations to occur. For many reasons, including the other risks identified in this section, the market price of our common stock may be more volatile than our market peers. These factors may result in short-term or long-term negative pressure on the value of our common stock. We cannot predict the prices at which our common stock may trade.

The market price of shares of our common stock may fluctuate significantly due to a number of factors, some of which may be beyond our control, including: actual or anticipated fluctuations in our operating results, declining

27

Index

operating revenues derived from our core business, the operating and stock price performance of comparable companies, margin trading, short sales, hedging and derivative transactions involving our common stock, changes in the regulatory and legal environment in which we operate, market conditions in the construction materials and contracting services market, and the domestic and global economy as a whole.

If securities or industry analysts do not publish research or publish misleading or unfavorable research about our business, our stock price and trading volume could decline.

The trading market for our common stock depends in part on the research and reports that securities or industry analysts publish about us or our business. If one or more of the analysts downgrades our stock or publishes misleading or unfavorable research about our business, our stock price could decline. If one or more of the analysts ceases coverage of our common stock or fails to publish reports on us regularly, demand for our common stock could decrease, which could cause our common stock price or trading volume to decline.

Stockholder percentage of ownership in us may be diluted in the future.

Our stockholders’ percentage ownership in our company may be diluted because of equity awards that have been and will be granted to our directors, officers and employees or otherwise as a result of equity issuances for acquisitions or capital market transactions.

In addition, our amended and restated certificate of incorporation authorizes us to issue, without the approval of our stockholders, one or more classes or series of preferred stock that have such designation, powers, preferences and relative, participating, optional and other special rights, including preferences over our common stock respecting dividends and distributions, as our board of directors generally may determine. The terms of one or more classes or series of preferred stock could dilute the voting power or reduce the value of our common stock. Similarly, the repurchase or redemption rights or liquidation preferences we could assign to holders of preferred stock could affect the residual value of the common stock.

We cannot guarantee the timing, declaration, amount or payment of dividends, if any, on our common stock.

The timing, declaration, amount and payment of any dividends are within the discretion of our board of directors, and will depend upon many factors, including our financial condition, earnings, capital requirements of our operating subsidiaries, covenants associated with certain of our debt service obligations, legal requirements, regulatory constraints, industry practice, ability to access capital markets, and other factors deemed relevant by our board of directors. Moreover, if we determine to pay any dividend in the future, there can be no assurance that we will continue to pay such dividends or the amount of such dividends.

Our amended and restated bylaws designates the Court of Chancery of the State of Delaware or, if the Court of Chancery of the State of Delaware does not have jurisdiction, another state court of the State of Delaware, or, if no state court located in the State of Delaware has jurisdiction, the federal court for the District of Delaware, as the sole and exclusive forum for certain types of actions and proceedings that may be initiated by Knife River’s stockholders, which could discourage lawsuits against us and our directors and officers.

Our amended and restated bylaws provides that, unless the board of directors otherwise determines, the Court of Chancery of the State of Delaware or, if the Court of Chancery of the State of Delaware does not have jurisdiction, another state court of the State of Delaware, or, if no state court located in the State of Delaware has jurisdiction, the federal court for the District of Delaware, will be the sole and exclusive forum for any derivative action or proceeding brought on behalf of our company, any action asserting a claim of breach of a fiduciary duty owed by any director or officer to our company or our stockholders, creditors or other constituents, any action asserting a claim against us or any director or officer arising pursuant to any provision of the DGCL or our amended and restated certificate of incorporation or amended and restated bylaws, or any action asserting a claim against us or any director or officer governed by the internal affairs doctrine.

In addition, our amended and restated bylaws further provide that, unless the board of directors otherwise determines, the federal district courts of the United States of America shall be the sole and exclusive forum for any action asserting a claim arising under the Securities Act. The exclusive forum provision does not apply to actions

28

Index

arising under the Exchange Act or the rules and regulations thereunder. While the Delaware Supreme Court ruled in March 2020 that federal forum selection provisions purporting to require claims under the Securities Act be brought in federal court are “facially valid” under Delaware law, there is uncertainty as to whether other courts will enforce our federal forum provision described above. Our stockholders will not be deemed to have waived compliance with the federal securities laws and the rules and regulations thereunder.

This exclusive forum provision may limit the ability of our stockholders to bring a claim in a judicial forum that such stockholders find favorable for disputes with us or our directors or officers, which may discourage such lawsuits against us and our directors and officers, and such provision may also make it more expensive for our stockholders to bring such claims.

Although our amended and restated bylaws include the exclusive forum provision described above, it is possible that a court could rule that this provision is inapplicable or unenforceable. Alternatively, if a court outside of Delaware were to find this exclusive forum provision inapplicable to, or unenforceable in respect of, one or more of the specified types of actions or proceedings described above, we may incur additional costs associated with resolving such matters in other jurisdictions, which could adversely affect our business, financial condition or results of operations.

Provisions in our amended and restated certificate of incorporation and amended and restated bylaws and Delaware law may prevent or delay an acquisition of Knife River, which could decrease the trading price of our common stock.

Our amended and restated certificate of incorporation and amended and restated bylaws, and Delaware law, contain provisions that are intended to deter coercive takeover practices and inadequate takeover bids by making such practices or bids more expensive to the acquiror and to encourage prospective acquirors to negotiate with our board of directors rather than to attempt a hostile takeover. These provisions include rules regarding how stockholders may present proposals or nominate directors for election at stockholder meetings and the right of our board of directors to issue preferred stock without stockholder approval. Delaware law also imposes some restrictions on mergers and other business combinations between any holder of 15 percent or more of our outstanding common stock and our company.

We believe these provisions protect our stockholders from coercive or otherwise unfair takeover tactics by requiring potential acquirors to negotiate with our board of directors and by providing our board of directors with more time to assess any acquisition proposal. These provisions are not intended to make us immune from takeovers. However, these provisions apply even if the offer may be considered beneficial by some stockholders and could delay or prevent an acquisition that our board of directors determines is not in the best interests of our company and our stockholders. Accordingly, in the event that our board of directors determines that a potential business combination transaction is not in the best interests of our company and our stockholders but certain stockholders believe that such a transaction would be beneficial to our company and our stockholders, such stockholders may elect to sell their shares in our company and the trading price of our common stock could decrease.

These and other provisions of our amended and restated certificate of incorporation, amended and restated bylaws and the DGCL could have the effect of delaying, deferring or preventing a proxy contest, tender offer, merger or other change in control, which may have a material adverse effect on our business, financial condition and results of operations. In addition, applicable state insurance laws and regulations could delay or impede a change of control of our company.

Strata Acquisition Risks

We may not be able to fully realize the benefits from the Acquisition.

The acquisition of Strata may not perform as expected. If we are unsuccessful at, among other things, integrating Strata into our operations or managing the Strata business, our revenues and margins could be adversely affected and our business could suffer. See also “Operations, Growth, and Competitive Risks – our success depends, in part, on our ability to execute on our acquisition strategy to successfully integrate acquired businesses and to retain key employees of the acquired business.”

29

Index

The announcement and pendency of the Acquisition may have an adverse effect on our results of operations.

On December 20, 2024, Buyer entered into the Purchase Agreement relating to the Acquisition. Upon the terms and subject to the conditions set forth in the Purchase Agreement, Buyer (or its designee) will acquire (a) 100% of the issued and outstanding equity interests of Strata, (b) 100% of the issued and outstanding equity interests of Glacier Resources and (c) certain assets of the Asset Seller for $454.0 million in cash, subject to customary purchase price adjustments.

Uncertainty about the effect of the Acquisition on our employees, partners, customers and other third parties may disrupt our sales, marketing, operations or other key business activities and may have a material adverse effect on our business, financial condition, operating results, and cash flows. Any loss or distraction of such employees could have a material adverse effect on our business, financial condition and operating results. In addition, we have devoted, and will continue to devote, significant management and other internal resources towards the completion of the Acquisition and planning for integration, which could materially adversely affect our business, financial condition, operating results, and cash flows.

The failure to complete the Acquisition in a timely manner or at all could negatively impact the market price of our common stock. It could also adversely affect our business, financial condition, operating results and cash flows.

Completion of the Acquisition is subject to conditions beyond our control that may prevent, delay or otherwise adversely affect its completion in a material way, including, but not limited to, those described herein.

The obligation of the parties to consummate the Acquisition is subject to the satisfaction or waiver of certain customary closing conditions, including, among others, the expiration or early termination of the applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976 (as amended) and the receipt of all consents, clearances, waivers, approvals, or authorizations under any other antitrust law. We cannot guarantee that the closing conditions set forth in the Purchase Agreement will be satisfied or, even if satisfied, that no event of termination will take place.

Furthermore, if the Acquisition is significantly delayed or not completed, we may suffer other consequences that could adversely affect our business, results of operations and stock price, including the following:

•we would have incurred significant costs in connection with the Acquisition that we would be unable to recover;

•we may be subject to negative publicity or be negatively perceived by the investment or business communities;

•we may be subject to legal proceedings related to the Acquisition;

•any disruptions to our business resulting from the announcement and pendency of the Acquisition, including any adverse changes in our relationships with our customers, suppliers, other business partners and employees, may continue or intensify in the event the Acquisition is not consummated; and

•we may not be able to take advantage of alternative business opportunities or effectively respond to competitive pressures.

•we may be subject to paying a $15.0 million termination fee if the Acquisition is not finalized.

There can be no assurance that our business, financial condition, operating results and cash flows will not be adversely affected, as compared to our condition prior to the announcement of the Acquisition, if the Acquisition is not consummated.

30

Index

The incurrence by us of substantial indebtedness in connection with the financing of the Acquisition may have an adverse impact on our liquidity, limit our flexibility in responding to other business opportunities, and increase our vulnerability to adverse economic and industry conditions.

We expect to incur a significant amount of indebtedness in connection with the financing of the Acquisition, which we expect will be funded, in part, by entering into a new senior secured Term Loan B facility of $500 million. The use of indebtedness to finance the Acquisition will reduce our liquidity and could cause us to place more reliance on cash generated from operations to pay principal and interest on our debt, thereby reducing the availability of our cash flow for working capital and capital expenditure needs or to pursue other potential strategic plans. We expect that the agreements we will enter into with respect to the indebtedness we will incur to finance the Acquisition will contain certain restrictive covenants that limit, and in some circumstances prohibit, our ability to, among other things: obtain future financing, incur or guarantee additional debt, incur certain liens, enter into transactions with affiliates, transfer or sell certain assets, make acquisitions or needed capital expenditures, withstand the current or future downturns in our business, or the economy in general, conduct operations or otherwise take advantage of business opportunities that may arise, any of which could place us at a competitive disadvantage relative to our competitors. Our ability to comply with these negative covenants can be affected by events beyond our control. In addition, a breach of the negative covenants could result in an event of default with respect to the indebtedness, which, if not cured or waived, could result in the indebtedness becoming immediately due and payable and could have a material adverse effect on our business, financial condition, or operating results.

We have incurred, and will continue to incur, transaction fees and costs in connection with the Acquisition.

As of December 31, 2024, we have incurred $2.6 million of expenses and fees for professional services and other transaction costs in connection with the Acquisition and expect to continue to incur additional costs. These expenses are payable by us whether or not the Acquisition is completed. While we have assumed that a certain amount of transaction expenses will be incurred, factors beyond our control could affect the total amount or the timing of these expenses. Many of the expenses that will be incurred, by their nature, are difficult to estimate accurately. These expenses may exceed the costs historically borne by us. These costs could adversely affect our business, financial condition, operating results and cash flows.

ITEM 1B. UNRESOLVED STAFF COMMENTS

None.

ITEM 1C. CYBERSECURITY

Risk Management and Strategy

Overall Risk Management.We have implemented a cyber risk management program to help ensure that our electronic information and information systems are protected from various threats and are built on and follow the Cybersecurity Maturity Model Certification for information security requirements and the protection of sensitive information. The cyber risk management program is maintained as part of our overall governance, enterprise risk management program and compliance program. Our information systems experience ongoing and often sophisticated cyberattacks by a variety of sources with the apparent aim to breach our cyber-defenses. We also have cyber event related insurance. We are continuously reevaluating the need to upgrade and/or replace systems and network infrastructure. These upgrades and/or replacements could adversely impact operations by imposing increased expenses, creating delays or outages, or experiencing difficulties transitioning to new systems. System disruptions, if not anticipated and appropriately mitigated, could adversely affect our company. We continually assess risks from cybersecurity threats and adapt and enhance our controls accordingly.

Risks from Cybersecurity Threats.Although risks from cybersecurity threats, including as a result of any previous cybersecurity incidents, have not materially affected or are reasonably likely to materially affect us, including our business strategy, results of operations or financial condition, such incidents could have a material adverse effect in the future as cyberattacks continue to increase in frequency and sophistication.

31

Index

Employee Cybersecurity Training. We provide ongoing cybersecurity training and compliance programs to facilitate education for employees who may have access to our data and critical systems. Employee phishing tests are conducted on a monthly basis.

Engage Third-parties on Risk Management. Periodic external reviews, including penetration tests and security framework assessments, are conducted by auditors, external assessors, and/or consultants to assess and ensure compliance with our information security programs and practices. Internal and external auditors assess our information technology general controls on an annual basis.

Oversee Third-party Risk. We monitor risks associated with our vendors, which include processes such as completing due diligence on third party service providers before engaging with them for their services; assessing the third party’s cybersecurity posture by reviewing audit reports of the third party, completing cyber questionnaires, and reviewing applicable certification; including cybersecurity contractual language in contracts to limit risk; and monitoring and reassessing third party’s to ensure ongoing compliance with their cybersecurity obligations.

Other Risk Factors. See the risk factor “Technology disruptions or cyberattacks could adversely impact operations” in the section entitled “Item 1A. Risk Factors - Operations, Growth and Competitive Risks.”

Governance

Source: SEC EDGAR (public domain) · 10-K for the period ended 2024-12-31, filed 2025-02-21 · accession 0001955520-25-000010

Filing HTML rendered to line-structured narrative text by the shipped reducer (datafeeds.edgar_fulltext.visible_text, keep_table_headers=True): scripts and inline-XBRL headers are dropped, and table content is reduced to its short label cells — numeric table data is not rendered and is therefore not counted. The same rendering is used for every year, so a year-over-year comparison is like for like.

The text is our rendering of the filing, not a facsimile: original pagination, typography and tables are not reproduced, and the numbers live in the financial statements (FA).

The outline locates item HEADINGS in this document. Only Items 1A and 7 have certified boundaries elsewhere in the terminal (the redline and the narrative-overlap number); every span here runs from one heading found to the next heading found.

How the outline was chosen. It is the longest chain of item headings that runs forward through both the document and the standard item order: 23 headings are on that chain and 18 further heading-shaped lines are not — the table-of-contents echo of every item, cross-references and exhibit-list mentions. Each entry's length is measured from its heading to the next heading on the chain.