NEW YORK, Aug. 19, 2025 /PRNewswire/ -- Rowley Law PLLC is investigating potential securities law violations by NorthWestern Energy (NASDAQ: NWE) and its board of directors concerning the proposed acquisition of the company by Black Hills Corp. (NYSE: BKH). Stockholders will receive 0.98 shares of Black Hills common stock for each share of NorthWestern Energy stock that they hold. The transaction is expected to close in the later half of 2026, and NorthWestern Energy stockholders are expected to own approxi ...