NorthWestern Energy presents at BofA Power and Utilities Conference; no material new disclosures in slide deck

NorthWestern Energy Group, Inc.

CFO Crystal Lail and Director Travis Meyer hosting meetings at BofA conference on May 28, 2025.
Slide deck furnished as Exhibit 99.1 includes no new financial guidance or material developments.
No earnings results, M&A, or leadership changes disclosed in the presentation.

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