# EDGAR Filing Document

**Accession Number:** 0001993004
**File Stem:** 0001993004-26-000020
**Filing Date:** 2026-3
**Character Count:** 2382
**Document Hash:** 64f6ffe645e639e74ee22e4790c2df87
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001993004-26-000020.hdr.sgml**: 20260312

**ACCESSION NUMBER**: 0001993004-26-000020

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20260312

**DATE AS OF CHANGE**: 20260312

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** NorthWestern Energy Group, Inc.
- **CENTRAL INDEX KEY:** 0001993004
- **STANDARD INDUSTRIAL CLASSIFICATION:** ELECTRIC & OTHER SERVICES COMBINED [4931]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 932020320
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-56598
- **FILM NUMBER:** 26748010

**BUSINESS ADDRESS:**
- **STREET 1:** 3010 WEST 69TH STREET
- **CITY:** SIOUX FALLS
- **STATE:** SD
- **ZIP:** 57108
- **BUSINESS PHONE:** 605-978-2900

**MAIL ADDRESS:**
- **STREET 1:** 3010 WEST 69TH STREET
- **CITY:** SIOUX FALLS
- **STATE:** SD
- **ZIP:** 57108

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| |
|:---|
| **UNITED STATES** |
| **SECURITIES AND EXCHANGE COMMISSION** |
| **Washington, D.C. 20549** |
| **SCHEDULE 14A** |
| Proxy Statement Pursuant to Section 14(a) of |
| the Securities Exchange Act of 1934 (Amendment No.) |

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| | |
|:---|:---|
| Filed by the Registrant x | Filed by the Registrant x |
| Filed by a Party other than the Registrant o | Filed by a Party other than the Registrant o |
| Check the appropriate box: | Check the appropriate box: |
| □ | Preliminary Proxy Statement |
| □ | **Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))** |
| □ | Definitive Proxy Statement |
| ⌧ | Definitive Additional Materials |
| □ | Soliciting Material Pursuant to §240.14a-12 |

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| |
|:---|
| NorthWestern Energy Group, Inc. |
| (Name of Registrant as Specified In Its Charter) |
| (Name of Person(s) Filing Proxy Statement, if other than the Registrant) |

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| | |
|:---|:---|
| Payment of Filing Fee (Check the appropriate box): | Payment of Filing Fee (Check the appropriate box): |
| ⌧ | No fee required. |
| □ | Fee paid previously with preliminary materials. |
| □ | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a6(i)(1) and 0-11 |

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