Utility company Black Hills said it would buy peer NorthWestern Energy for US$3.6 billion, creating a larger regulated ...

Black Hills Corp. and NorthWestern Energy announced Tuesday an agreement to merge in an all-stock, tax-free transaction ...

Black Hills and NorthWestern Energy have entered a definitive agreement that will establish a electric and natural gas ...

NorthWestern Energy Group and Black Hills have agreed to combine to form a large $7.8 billion regulated electric and natural ...

NorthWestern Energy replaced the mighty Montana Power Co. in 1997, which was headquartered in Butte for decades.

Black Hills Energy and NorthWestern Energy officials announced Tuesday that the two South Dakota-based companies plan to ...

NorthWestern shareholders will receive 0.98 shares of Black Hills for each held. Black Hills stockholders would own roughly ...

Black Hills and NorthWestern Energy will merge in an all-stock deal to form a utility provider serving 2.1 million customers across eight states.

Black Hills Energy has announced its merger with another Great Plains utility company in response to what it says is a ...

Miners want to return to the treasured landscape, promising an economic boost while raising fears of how modern gold ...