MDU Resources Group Inc.’s utility operations, spread across eight states, as well as a pipeline business serving the the Rockies and Bakken Shale, reported increased profits during the second quarter from a year ago, beating back Covid-19’s negative impacts by using geographic diversity and a mid-size market focus.

CEO David Goodin said the Bismarck, ND-based utility holding company performed well in the quarter, posting record revenues and earnings in the construction businesses and strong results in its regulated energy delivery businesses. The construction materials and services units also built up a near-record level of almost $2.2 billion in backlog.

As a sign it is on solid footing, MDU at the end of June reached record employment levels, with 15,247 employees,...