Montana clears final hurdle for $15.4B NorthWestern–Black Hills merger
What's the deal? The Montana Public Service Commission on Tuesday approved the $15.4 billion merger of NorthWestern EnergyDealroom has a profile for this one. Try Dealroom → and Black Hills CorpDealroom has a profile for this one. Try Dealroom →, the last regulatory sign-off the companies needed to combine. The vote was 3–2.
What changes? The parent companies will merge under a holding company called Bright Horizon Energy Corporation, based in Rapid City, South Dakota, and trading under the ticker "HZN." NorthWestern and Black Hills will keep their names and local operations, with NorthWestern chief executive officer Brian Bird leading the new entity.
By the numbers: The combined company will serve about 2.1 million electric and natural gas customers across eight states. The all-stock deal carries an enterprise value of $15.4 billion; NorthWestern shareholders receive 0.98 Black Hills shares per share owned.
Why now? Announced in August 2025, the deal already won approval in South Dakota and Nebraska, plus federal sign-off. Montana was the final state to vote.
What's the pushback? Most members of the public who spoke opposed the merger, citing higher bills, weakened oversight, and the risk of subsidising data centers. Commissioner Randy Pinocci questioned the benefit to Montanans: "What are we going to do about lowering the rates for the people?"
What's the upside? Supporters say scale will make the utilities more efficient and better able to raise capital. Commissioner Jennifer Fielder said the merger means "tens of millions of dollars in savings," adding that those "are costs the customers will not have to pay." The approved order says rates will not rise as a result of the deal.
Commissioners also added conditions, requiring the utility to develop plans for using its increased share of generation at the Colstrip power plant. The order found "ring-fencing" safeguards adequate to insulate customers from the parent company's financial risks.
The signal: The approval reflects a broader wave of utility consolidation as companies chase scale and capital to meet rising electricity demand, including from data centers. The Montana vote tests whether promised savings can be balanced against ratepayer protections and local oversight — a question also facing far larger proposed deals now under regulatory scrutiny.
Read more: newsfromthestates.com
Image credit: USDAgov
