Form4insider filings, from the source

Company · CIK 0001993004 · SIC 4931 — Electric & Other Services Combined · Nasdaq

NorthWestern Energy Group, Inc. · NWE

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Aug 6, 2026 AForm 4 →Aug 6, 2:21 pm EDTJan Robert HorsfallDirector524$71.62$37,52911,670—
Aug 4, 2026 AForm 4 →Aug 5, 9:26 am EDTJeffrey W. YinglingDirector524$71.62$37,52924,349—
Jul 9, 2026 AForm 4/A →Jul 13, 11:54 am EDTMahvash YazdiDirector524$71.62$37,52922,932—
Jul 9, 2026 AForm 4 →Jul 13, 11:30 am EDTBritt E IdeDirector524$71.62$37,52915,558—
Jul 9, 2026 AForm 4 →Jul 13, 11:28 am EDTDavid L GoodinDirector524$71.62$37,5295,624—
Jul 9, 2026 AForm 4 →Jul 13, 11:27 am EDTSherina M. EdwardsDirector524$71.62$37,5299,978—
Jul 9, 2026 AForm 4 →Jul 13, 11:24 am EDTKent T LarsonDirector524$71.62$37,52912,041—
Jul 9, 2026 AForm 4 →Jul 13, 11:22 am EDTLinda G SullivanDirector768$71.62$55,00434,586—
Jul 6, 2026 AForm 4 →Jul 13, 11:17 am EDTMahvash YazdiDirector524$71.62$37,52922,932— late

Reported at this company — derivatives (options, RSUs, warrants)

No reported derivative activity in this period.