Black Hills Corporation shares rise 2.14% premarket after announcing merger with NorthWestern Energy Group.
ByAinvest
Friday, Aug 22, 2025 8:21 am ET1min read
BKH--
Black Hills Corporation rose 2.14% in premarket trading, with the company's merger with NorthWestern Energy Group, Inc. being investigated by Halper Sadeh LLC for potential violations of federal securities laws. Additionally, Wartsila Corporation will supply six dual-fuel engines for a power plant in Rapid City, South Dakota, which will be owned and operated by Black Hills Energy.
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