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AI brief of an SEC Form 8-K · NorthWestern Energy (NWE)

NorthWestern Energy sells $150 million of 5.51% South Dakota first mortgage bonds due 2036

Neutral Impact 2 of 5 financing Written later

NorthWestern Energy Public Service Corporation, a wholly owned subsidiary of NorthWestern Energy Group, issued $150 million of South Dakota First Mortgage Bonds on June 15, 2026. The bonds carry a 5.51% interest rate and mature on June 15, 2036, and they rank equally with other debt secured by the same first mortgage lien. The filing describes a debt issuance under a standard mortgage indenture, with no change to the company's operations or outlook stated.

Key points

  • Principal amount: $150 million, issued June 15, 2026
  • Interest rate: 5.51%, maturing June 15, 2036
  • Terms set in the Twenty-third Supplemental Indenture dated June 1, 2026, with The Bank of New York Mellon as trustee
  • Bonds were sold in an exempt transaction and are not registered under the Securities Act of 1933

The filing

CompanyNorthWestern Energy (NWE)
Form8-K, current report
Filed with the SECJun 22, 2026, 10:47 AM ET
Accession number0001993004-26-000046

Items reported: 1.01 Material Definitive Agreement2.03 New Direct Financial Obligation

Read the filing on SEC.gov ↗

Written by AI on Nov 8, 2026, 1:05 AM ET, from this filing only. Written later: this filing was briefed after the fact, when past filings were added to the site, so the brief may be read with hindsight; the filing itself is the record of what was known on June 22, 2026.

Briefs are written by AI from the filing text and can contain mistakes — open the filing before acting on anything. Impact (1-5) and tone are the AI's reading of the filing for shareholders, not a price forecast. Not investment advice.