Knife River Corp. KNF

What this company does

Knife River Corporation is an aggregates-based construction materials and contracting services provider in the United States. It operates a network of 208 active aggregate sites, 135 ready-mix plants, 55 asphalt plants and 9 liquid asphalt terminals, supplying construction materials and contracting services to customers across 14 states. As of December 31, 2025, it employed 5,298 people, all of whom were employed in the United States. The company organizes its business into four operating segments, each also a reportable segment: West, Mountain, Central and Energy Services, with the West, Mountain and Central segments organized by geographic location and each offering a vertically integrated suite of products and services. Each of the geographic segments mines, processes and sells construction aggregates, produces and sells asphalt, and produces and sells ready-mix concrete, along with contracting services that include heavy-civil construction, asphalt and concrete paving, and site development and grading. The Energy Services segment, with locations throughout the company's geographic footprint, produces and supplies liquid asphalt, primarily for use in asphalt road construction, and supplies some of the company's other segments. Knife River became an independent, publicly traded company on May 31, 2023, when its separation from MDU Resources was completed as a tax-free spin-off, and its common stock is listed under the symbol “KNF” on the New York Stock Exchange.

Written from the business description in Knife River Corp's annual report to the U.S. Securities and Exchange Commission, filed 20 February 2026. Every sentence was checked against that document before publication.