MDU

Mdu Resources Group, Inc.

A regulated energy delivery company in the northern U.S., MDU Resources delivers electricity and natural gas and runs pipelines through brands like Montana-Dakota and WBI Energy, serving homes and businesses across several states. It began in 1924 as a small electric utility founded by Rolland Heskett along the Montana–North Dakota border, and the initials "MDU" simply stand for Montana-Dakota Utilities. In 2024 it spun off its construction business to focus purely on utilities, keeping its 1920s roots in the prairie.