Knife River Corp. acquired the assets of Donaldson Brothers Ready Mix, an aggregate-based ready-mixed concrete supplier in western Montana.
The acquisition is Knife River’s third in its Mountain segment this year.
According to Knife River, Donaldson supplies the Bitterroot Valley south of Missoula, Montana. In addition to three aggregate sources that provide the business with more than 30 years of supply, Donaldson operates a ready-mix plant and manufactures precast concrete products.
Last month, Knife River acquired Morgan Asphalt in Salt Lake City. In January, Knife River purchased the assets of Sparrow Enterprises in Helena, Montana.
“These three acquisitions in the Mountain segment support our strategy of targeting aggregates-based, vertically integrated opportunities in midsize, higher-growth markets,” says Brian Gray, Knife River president and CEO. “The Donaldson assets provide strategic aggregate reserves in western Montana while establishing a foothold in a new market. Montana is growing, and we are now in an even better position to support that growth.”
Related: Fourth-quarter, full-year 2025 aggregate production totals are in
