Knife River Corp

Note 15 -Business Segment Data

We focus on the vertical integration of our products and services by offering customers a single source for construction materials and related contracting services. We operate in 15 states across the United States through ourfour operating segments: West, Mountain, Central and Energy Services, each of which is also a reportable segment. Each segment’s performance is evaluated based on segment results without allocating corporate expenses, which include corporate costs associated with accounting, legal, treasury, business development, information technology, human resources, and other corporate expenses that support the operating segments.

Three of our reportable segments are aligned by key geographic areas due to the production of construction materials and related contracting services andone is based on product line. Each segment is led by a segment manager who reports to our chief operating officer, who is also our chief operating decision maker, along with the chief executive officer. Our chief operating decision maker uses EBITDA to evaluate the performance of the segments, perform analytical comparisons to budget and uses historical and projected EBITDA to allocate resources, including capital allocations.

Each geographic segment offers a vertically integrated suite of products and services, including aggregates, ready-mix concrete, asphalt and contracting services, while the Energy Services segment produces and supplies liquid asphalt, primarily for use in asphalt road construction, and is a supplier to some of the other segments. Each geographic segment mines, processes and sells construction aggregates (crushed stone and sand and gravel); produces and sells asphalt; and produces and sells ready-mix concrete as well as vertically integrating its contracting services to support the aggregate-based product lines including heavy-civil construction, asphalt and concrete paving, and site development and grading. Although not common to all locations, the geographic segments also sell cement, merchandise and other building materials and related services.

Corporate Services represents the unallocated costs of certain corporate functions, such as accounting, legal, treasury, business development, information technology, human resources and other corporate expenses that support the operating segments. Corporate Services also includes an immaterial amount of external revenue from the Knife River Training Center. We account for intersegment sales and transfers as if the sales or transfers were to third parties. The accounting policies applicable to each segment are consistent with those used in the audited consolidated financial statements.

The information that follows uses the same accounting policies as described in the audited financial statements and notes included in the Company's 2025 Annual Report. Information on our segments was as follows:

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