/PRNewswire/ MDU Resources Group, Inc. (NYSE: MDU) today announced earnings of $378.1 million, or $1.87 per share, in 2021, compared to $390.2 million, or.
/PRNewswire/ MDU Resources Group, Inc. (NYSE: MDU) today announced that it plans to make capital investments totaling $3.0 billion for the five-year period.
/PRNewswire/ Knife River Corporation announced today it has acquired Baker Rock Resources and Oregon Mainline Paving, two premier construction materials.