MDU Resources Announces Second Quarter 2025 Results; Updates Guidance BISMARCK, N.D. – August 7, 2025 – MDU Resources Group, Inc. (NYSE: MDU) today announced second quarter financial results for 2025, with sustained momentum in the pipeline segment and regulatory progress supporting the company's long- term value proposition as a pure-play regulated energy delivery business. "We continued our solid start to 2025, despite weather and operating cost challenges that impacted the second quarter results," said N ...