NWE: Guidance held firm as Colstrip costs pressured earnings and merger approval neared completion

What happened

NorthWestern Energy reported third-quarter GAAP diluted earnings per share of $0.50 and adjusted earnings per share of $0.58. It reaffirmed its 2026 guidance and long-term annual growth target of 4%–6%. Merger approvals are largely complete, with Montana PSC approval still outstanding and a year-end closing anticipated if approval is received.

Confirmed

Global impact / market context

Reaffirmed guidance signals that the company still expects to meet its stated financial outlook despite Colstrip costs pressuring earnings, as described in the headline. The remaining Montana approval is a condition for the anticipated merger closing, so a delay could push back the transaction and its expected effects.

Analyst inference

The reported adjusted earnings per share exceeded the GAAP figure, but the article gives no prior-period comparison or forecast, so the results alone do not show whether performance improved or beat expectations. The 4%–6% target provides a stated longer-term growth benchmark, not a guarantee.

Analyst inference

What to watch

1. Watch for a decision from the Montana Public Service Commission, or PSC, the state regulator whose approval remains outstanding for the merger. Confirmed
2. Check whether the company announces a year-end merger closing; the article says that timing is anticipated only if the outstanding approval is received. Confirmed
3. Compare future results with reaffirmed 2026 guidance and the 4%–6% long-term growth target to assess whether Colstrip costs are weighing on earnings. Analyst inference

Evidence

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