NorthWestern Energy said a portion of the new Colstrip shares it will acquire on Jan. 1, 2026, will be transferred to a new subsidiary — one the utility said is not under the authority of the Public Service Commission.

In a recent letter to regulators, NorthWestern Energy also said the deal does not require approval by the Public Service Commission.

NorthWestern sent the letter in response to questions from the Public Service Commission about an October filing the utility made with the Federal Energy Regulatory Commission about the new shares.

In the filing, the subsidiary, called NorthWestern Colstrip 370 Pu LLC, requests federal approval for selling electricity on its own as a separate and “unregulated” entity.

The filing has raised questions from not only the Public Service Commissi

See Full Page