---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-23-033376"
form_type: "8-K"
ticker: null
cik: "0000073088"
company_name: "NORTHWESTERN CORP"
filed_at: "2023-10-02T23:59:59+00:00"
generated_at: "2026-06-10T06:41:30.816466+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# NorthWestern Corporation reorganizes into holding company; shares convert 1:1 to New NWE common

## Summary
- Merger effective Oct 2, 2023, creates NorthWestern Energy Group as new public holding company.
- Each share of NorthWestern Corporation common stock automatically converted into one share of New NWE common.
- Trading symbol NWE and CUSIP unchanged; no stockholder vote required.
- Second phase planned in early 2024 to transfer SD and NE utility assets to subsidiary NorthWestern Energy Public Service Corporation.
- Merger intended to qualify as tax-free reorganization under Section 368(a)(2)(E).

## SEC filing metadata
- accession: 0001628280-23-033376
- form_type: 8-K
- cik: 0000073088
- company_name: NORTHWESTERN CORP
- filed_at: 2023-10-02T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 1.01, 3.01, 3.03, 5.03, 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/73088/000162828023033376/0001628280-23-033376-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/73088/000162828023033376/nwe-20231002.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-23-033376
- JSON: https://secwatch.observer/filing/0001628280-23-033376.json
- Plain text: https://secwatch.observer/filing/0001628280-23-033376.txt

## Key facts
- Governance Changes
  NORTHWESTERN CORP: Amended certificate of incorporation to add a provision required by DGCL Section 251(g) regarding stockholder approval requirements for certain acts or transactions involving the company (effective 2023-10-02).
  - Change: charter amendment
  - Effective: 2023-10-02
  source text: On October 2, 2023, 2023, the Amended and Restated Certificate of Incorporation of Old NWE (the “Old NWE Charter”) was amended pursuant to the Merger to add a provision, which is required by Section 251(g) of the DGCL, that provides that any act or transaction by or involving Old NWE, other than the election or removal of directors, that requires for its adoption under the DGCL or the Old NWE Charter the approval of the stockholders of Old NWE shall require the approval of the stockholders of New NWE by the same vote as is required by the DGCL and/or the Old NWE Charter.
  evidence_url: https://www.sec.gov/Archives/edgar/data/73088/000162828023033376/0001628280-23-033376-index.htm
- Material Agreements
  NORTHWESTERN CORP entered into Merger Agreement with New NWE, NorthWestern Energy Merger Company (effective 2023-10-02).
  - Action: entry
  - Agreement: merger
  - Counterparty: New NWE, NorthWestern Energy Merger Company
  - Effective: 2023-10-02
  source text: On October 2, 2023, Old NWE implemented the Merger pursuant to the Agreement and Plan of Merger (the “Merger Agreement”), dated as of October 2, 2023, by and among Old NWE, New NWE and NorthWestern Energy Merger Company, a Delaware corporation (“Merger Sub”)
  evidence_url: https://www.sec.gov/Archives/edgar/data/73088/000162828023033376/0001628280-23-033376-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.