Knife River Corporation

Knife River Corporation is a vertically integrated construction materials producer and contracting services provider headquartered in Bismarck, North Dakota, operating across 14 states after spinning off from MDU Resources in 2023. The company mines aggregates and produces ready-mix concrete, asphalt, cement and prestressed products, and runs a street and highway contracting business whose backlog stood at $1.2 billion in mid-2026, roughly 85 percent publicly funded. Knife River shipped 10.03 million tons of aggregates in the second quarter of 2026, up 13.7 percent year over year at an average realized price of $19.41 a ton, though adjusted EBITDA margin fell 200 basis points to 14.9 percent on higher energy costs, weather and product mix.

Knife River takes its name from the river in North Dakota where the company got its start in 1917, and the firm still keeps its headquarters in Bismarck more than a century later. Growth for decades ran through corporate ownership rather than acquisition: Montana-Dakota Utilities purchased the company in 1945, and it became part of MDU Resources Group in 1985. Knife River’s own expansion into a multi-state operator began later, and its history page credits nearly 100 acquisitions since 1992 for carrying it from North Dakota into California, Alaska, Oregon, Hawaii, Montana, Wyoming, Idaho, Minnesota, Texas, Iowa, Nebraska, South Dakota and Washington, building revenue to roughly $3 billion along the way. The company separated from MDU Resources into an independent, publicly traded business on the New York Stock Exchange in 2023.

Today Knife River employs more than 5,700 people and organizes its work around four stated priorities: people, safety, quality and environment. President and CEO Brian Gray frames the philosophy as putting every person first, and the company backs that with charitable programs aimed at youth, veterans and community betterment in the places where it operates. The company’s own vendor code of conduct and a public “Leading with Integrity” statement extend that framing to how it expects partners and suppliers to behave, not just employees.

Beyond the heavy-civil paving and construction work highlighted elsewhere, Knife River’s construction division also handles railroad and marine construction alongside more familiar site development, grading, excavating and underground utility work. The company additionally runs a prestress products line, marketed under Knife River Prestress, and a specialty products division that rounds out its aggregates, asphalt and ready-mix concrete businesses. That range lets a single Knife River location supply the raw materials for a project and then build it, from demolition through finished pavement. The company even posts its own retired-equipment list for sale — pavers, crushers, trucks — a small but telling sign that this is run as an operating business first, not simply a holding company for its acquisitions.