Business Wire·Mar 23, 2026, 6:30 AM ET

Knife River Acquires Aggregates and Ready-Mix Business in Montana

Knife River Corporation acquired the assets of Donaldson Brothers Ready Mix Inc., an aggregates-based ready-mix supplier in western Montana.
This transaction marks Knife River's third acquisition within its Mountain Segment during 2026.
Donaldson Brothers operates in the Bitterroot Valley south of Missoula, managing three aggregates sources with over 30 years of supply, a ready-mix plant, and precast concrete manufacturing.
The acquisition follows Knife River's purchase of Morgan Asphalt Inc. in Salt Lake City last month & the acquisition of Sparrow Enterprises Inc. in Helena, Mont. in January.
CEO Brian Gray stated the acquisitions support a strategy targeting vertically integrated aggregates opportunities in mid-size, higher-growth markets.
The Donaldson assets provide strategic aggregate reserves in western Montana while establishing a foothold in the growing Montana market.
Knife River Corporation is a member of the S&P MidCap 400 index, mining aggregates & providing vertically integrated contracting services for DOT & private projects.
The press release includes forward-looking statements regarding growth potential & strategic expansion, noting that actual results may differ materially from projections.