NorthWestern Energy Group, Inc. SEC filings NWE
NorthWestern Energy Group, Inc. has 319 filings in SEC EDGAR's recent list, going back to Oct 2, 2023. Its latest annual report, Form 10-K, was filed on Feb 12, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Nov 5, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Nov 6, 2026 (regulation fd disclosure). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 4 | Insider transaction | Oct 5, 2026 | Oct 1, 2026 |
| 4 | Insider transaction | Oct 5, 2026 | Oct 1, 2026 |
| 4 | Insider transaction | Oct 5, 2026 | Oct 1, 2026 |
| 4 | Insider transaction | Oct 5, 2026 | Oct 1, 2026 |
| 4 | Insider transaction | Oct 5, 2026 | Oct 1, 2026 |
| 4 | Insider transaction | Oct 5, 2026 | Oct 1, 2026 |
| 4 | Insider transaction | Oct 5, 2026 | Oct 1, 2026 |
| 4 | Insider transaction | Oct 5, 2026 | Oct 1, 2026 |
| 4 | Insider transaction | Aug 6, 2026 | Aug 6, 2026 |
| 4 | Insider transaction | Aug 5, 2026 | Aug 4, 2026 |
| 4/A | Form 4/a | Jul 13, 2026 | Jul 9, 2026 |
| 4 | Insider transaction | Jul 13, 2026 | Jul 9, 2026 |
| 4 | Insider transaction | Jul 13, 2026 | Jul 9, 2026 |
| 4 | Insider transaction | Jul 13, 2026 | Jul 9, 2026 |
| 4 | Insider transaction | Jul 13, 2026 | Jul 9, 2026 |
| 4 | Insider transaction | Jul 13, 2026 | Jul 9, 2026 |
| 4 | Insider transaction | Jul 13, 2026 | Jul 6, 2026 |
| 4 | Insider transaction | May 12, 2026 | May 11, 2026 |
| 4 | Insider transaction | May 12, 2026 | May 11, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 30, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 29, 2026 | — |
| 4 | Insider transaction | Apr 7, 2026 | Apr 7, 2026 |
| 4 | Insider transaction | Apr 7, 2026 | Apr 7, 2026 |
| 4 | Insider transaction | Apr 7, 2026 | Apr 7, 2026 |
| 4 | Insider transaction | Apr 7, 2026 | Apr 7, 2026 |
| 4 | Insider transaction | Apr 7, 2026 | Apr 7, 2026 |
| 4 | Insider transaction | Apr 7, 2026 | Apr 7, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 27, 2026 | — |
| 4 | Insider transaction | Mar 3, 2026 | Mar 3, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Feb 25, 2026 | Feb 24, 2026 |
| 4 | Insider transaction | Feb 25, 2026 | Feb 24, 2026 |
| 4 | Insider transaction | Feb 25, 2026 | Feb 24, 2026 |
| 4 | Insider transaction | Feb 25, 2026 | Feb 24, 2026 |
| 4 | Insider transaction | Feb 25, 2026 | Feb 24, 2026 |
| 4 | Insider transaction | Feb 25, 2026 | Feb 24, 2026 |
| 4 | Insider transaction | Feb 4, 2026 | Feb 3, 2026 |
| 4 | Insider transaction | Feb 4, 2026 | Feb 3, 2026 |
| 4 | Insider transaction | Jan 26, 2026 | Jan 22, 2026 |
| 4 | Insider transaction | Jan 23, 2026 | Jan 22, 2026 |
| 4 | Insider transaction | Jan 23, 2026 | Jan 22, 2026 |
| 4 | Insider transaction | Jan 23, 2026 | Jan 22, 2026 |
| 4 | Insider transaction | Jan 23, 2026 | Jan 22, 2026 |
| 4 | Insider transaction | Jan 23, 2026 | Jan 22, 2026 |
| 4 | Insider transaction | Jan 23, 2026 | Jan 22, 2026 |
| 4 | Insider transaction | Jan 23, 2026 | Jan 22, 2026 |
| 4 | Insider transaction | Jan 20, 2026 | Jan 15, 2026 |
| 4 | Insider transaction | Jan 20, 2026 | Jan 15, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Dec 19, 2025 | Dec 19, 2025 |
| 4 | Insider transaction | Nov 5, 2025 | Nov 4, 2025 |
| 4 | Insider transaction | Nov 5, 2025 | Nov 4, 2025 |
| 4 | Insider transaction | Oct 7, 2025 | Oct 6, 2025 |
| 4 | Insider transaction | Oct 7, 2025 | Oct 6, 2025 |
| 4 | Insider transaction | Oct 7, 2025 | Oct 6, 2025 |
| 4 | Insider transaction | Oct 7, 2025 | Oct 6, 2025 |
| 4 | Insider transaction | Oct 7, 2025 | Oct 6, 2025 |
| 4 | Insider transaction | Oct 7, 2025 | Oct 6, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2025 | — |
| 4 | Insider transaction | Aug 4, 2025 | Aug 1, 2025 |
| 4 | Insider transaction | Aug 4, 2025 | Aug 1, 2025 |
| 4 | Insider transaction | Jul 9, 2025 | Jul 1, 2025 |
| 4 | Insider transaction | Jul 7, 2025 | Jul 1, 2025 |
| 4 | Insider transaction | Jul 7, 2025 | Jul 1, 2025 |
| 4 | Insider transaction | Jul 7, 2025 | Jul 1, 2025 |
| 4 | Insider transaction | Jul 7, 2025 | Jul 1, 2025 |
| 4 | Insider transaction | Jul 7, 2025 | Jul 1, 2025 |
| 4 | Insider transaction | May 6, 2025 | May 5, 2025 |
| 4 | Insider transaction | May 5, 2025 | May 2, 2025 |
| 4 | Insider transaction | May 2, 2025 | May 2, 2025 |
| 144 | Notice of proposed sale | May 2, 2025 | — |
| 4 | Insider transaction | Apr 7, 2025 | Apr 4, 2025 |
| 4 | Insider transaction | Apr 7, 2025 | Apr 4, 2025 |
| 4 | Insider transaction | Apr 7, 2025 | Apr 4, 2025 |
| 4 | Insider transaction | Apr 7, 2025 | Apr 4, 2025 |
| 4 | Insider transaction | Apr 7, 2025 | Apr 4, 2025 |
| 4 | Insider transaction | Apr 7, 2025 | Apr 4, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 3, 2025 | — |
| 4 | Insider transaction | Mar 10, 2025 | Mar 7, 2025 |
| 4 | Insider transaction | Mar 10, 2025 | Mar 7, 2025 |
| 4 | Insider transaction | Mar 10, 2025 | Mar 3, 2025 |
| 4 | Insider transaction | Mar 5, 2025 | Mar 3, 2025 |
| 4 | Insider transaction | Mar 5, 2025 | Mar 3, 2025 |
| 4 | Insider transaction | Mar 5, 2025 | Mar 3, 2025 |
| 4 | Insider transaction | Mar 5, 2025 | Mar 3, 2025 |
| 4 | Insider transaction | Mar 5, 2025 | Mar 3, 2025 |
| 4 | Insider transaction | Mar 5, 2025 | Mar 3, 2025 |
| 4 | Insider transaction | Mar 5, 2025 | Mar 3, 2025 |
| 4 | Insider transaction | Mar 5, 2025 | Mar 3, 2025 |
| 4 | Insider transaction | Mar 5, 2025 | Mar 3, 2025 |
| 4 | Insider transaction | Feb 26, 2025 | Feb 25, 2025 |
| 144 | Notice of proposed sale | Feb 25, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 14, 2025 | — |
| 4 | Insider transaction | Feb 6, 2025 | Feb 5, 2025 |
| 4 | Insider transaction | Feb 6, 2025 | Feb 5, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 5, 2025 | — |
| 4 | Insider transaction | Jan 6, 2025 | Jan 6, 2025 |
| 4 | Insider transaction | Jan 6, 2025 | Jan 6, 2025 |
| 4 | Insider transaction | Jan 6, 2025 | Jan 6, 2025 |
| 4 | Insider transaction | Jan 6, 2025 | Jan 6, 2025 |
| 4 | Insider transaction | Jan 6, 2025 | Jan 6, 2025 |
| 4 | Insider transaction | Jan 6, 2025 | Jan 6, 2025 |
| 4 | Insider transaction | Dec 13, 2024 | Dec 12, 2024 |
| 144 | Notice of proposed sale | Dec 12, 2024 | — |
| 144 | Notice of proposed sale | Dec 9, 2024 | — |
| 4 | Insider transaction | Dec 9, 2024 | Dec 9, 2024 |
| 4 | Insider transaction | Dec 4, 2024 | Dec 3, 2024 |
| 3 | Initial insider ownership | Dec 2, 2024 | Dec 1, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 8, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 8, 2024 | — |
| 4 | Insider transaction | Nov 4, 2024 | Nov 1, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Oct 18, 2024 | — |
| 4 | Insider transaction | Oct 2, 2024 | Oct 1, 2024 |
| 4 | Insider transaction | Oct 2, 2024 | Oct 1, 2024 |
| 4 | Insider transaction | Oct 2, 2024 | Oct 1, 2024 |
| 4 | Insider transaction | Oct 2, 2024 | Oct 1, 2024 |
| 4 | Insider transaction | Oct 2, 2024 | Oct 1, 2024 |
| 4 | Insider transaction | Oct 2, 2024 | Oct 1, 2024 |
| 4 | Insider transaction | Oct 2, 2024 | Oct 1, 2024 |
| 4 | Insider transaction | Aug 8, 2024 | Aug 8, 2024 |
| 4 | Insider transaction | Aug 5, 2024 | Aug 1, 2024 |
| 4 | Insider transaction | Jul 2, 2024 | Jul 2, 2024 |
| 4 | Insider transaction | Jul 2, 2024 | Jul 2, 2024 |
| 4 | Insider transaction | Jul 2, 2024 | Jul 2, 2024 |
| 4 | Insider transaction | Jul 2, 2024 | Jul 2, 2024 |
| 4 | Insider transaction | Jul 2, 2024 | Jul 2, 2024 |
| 4 | Insider transaction | Jul 2, 2024 | Jul 2, 2024 |
| 4 | Insider transaction | Jul 2, 2024 | Jul 2, 2024 |
| 4 | Insider transaction | May 8, 2024 | May 7, 2024 |
| 144 | Notice of proposed sale | May 7, 2024 | — |
| 4 | Insider transaction | May 6, 2024 | May 2, 2024 |
| 4 | Insider transaction | May 3, 2024 | May 3, 2024 |
| 144 | Notice of proposed sale | May 3, 2024 | — |
| 4 | Insider transaction | May 1, 2024 | May 1, 2024 |
| 144 | Notice of proposed sale | May 1, 2024 | — |
| 4 | Insider transaction | Apr 2, 2024 | Apr 2, 2024 |
| 4 | Insider transaction | Apr 2, 2024 | Apr 2, 2024 |
| 4 | Insider transaction | Apr 2, 2024 | Apr 2, 2024 |
| 4 | Insider transaction | Apr 2, 2024 | Apr 2, 2024 |
| 4 | Insider transaction | Apr 2, 2024 | Apr 2, 2024 |
| 4 | Insider transaction | Apr 2, 2024 | Apr 2, 2024 |
| 4 | Insider transaction | Apr 2, 2024 | Apr 2, 2024 |
| 4 | Insider transaction | Apr 2, 2024 | Apr 2, 2024 |
| 4 | Insider transaction | Mar 14, 2024 | Mar 13, 2024 |
| 4 | Insider transaction | Mar 14, 2024 | Mar 13, 2024 |
| 4 | Insider transaction | Mar 14, 2024 | Mar 13, 2024 |
| 4 | Insider transaction | Mar 14, 2024 | Mar 13, 2024 |
| 4 | Insider transaction | Mar 14, 2024 | Mar 13, 2024 |
| 4 | Insider transaction | Mar 14, 2024 | Mar 13, 2024 |
| 4 | Insider transaction | Mar 14, 2024 | Mar 13, 2024 |
| 4 | Insider transaction | Mar 14, 2024 | Mar 13, 2024 |
| 4 | Insider transaction | Mar 14, 2024 | Mar 13, 2024 |
| 4 | Insider transaction | Mar 14, 2024 | Mar 13, 2024 |
| 4 | Insider transaction | Mar 14, 2024 | Mar 13, 2024 |
| 4 | Insider transaction | Mar 6, 2024 | Mar 5, 2024 |
| 4 | Insider transaction | Mar 6, 2024 | Mar 5, 2024 |
| 4 | Insider transaction | Mar 6, 2024 | Mar 5, 2024 |
| 4 | Insider transaction | Mar 6, 2024 | Mar 5, 2024 |
| 4 | Insider transaction | Mar 6, 2024 | Mar 5, 2024 |
| 4 | Insider transaction | Mar 6, 2024 | Mar 5, 2024 |
| 4 | Insider transaction | Mar 6, 2024 | Mar 5, 2024 |
| 4 | Insider transaction | Mar 6, 2024 | Mar 5, 2024 |
| 4 | Insider transaction | Mar 6, 2024 | Mar 5, 2024 |
| 4 | Insider transaction | Mar 5, 2024 | Mar 1, 2024 |
| 4 | Insider transaction | Feb 27, 2024 | Feb 27, 2024 |
| 4 | Insider transaction | Feb 21, 2024 | Feb 20, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 12, 2024 | — |
| 4 | Insider transaction | Feb 7, 2024 | Feb 5, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 22, 2024 | — |
| 4 | Insider transaction | Jan 8, 2024 | Jan 8, 2024 |
| 4 | Insider transaction | Jan 8, 2024 | Jan 8, 2024 |
| 4 | Insider transaction | Jan 8, 2024 | Jan 8, 2024 |
| 4 | Insider transaction | Jan 8, 2024 | Jan 8, 2024 |
| 4 | Insider transaction | Jan 8, 2024 | Jan 8, 2024 |
| 4 | Insider transaction | Jan 8, 2024 | Jan 8, 2024 |
| 4 | Insider transaction | Jan 8, 2024 | Jan 8, 2024 |
| 4 | Insider transaction | Jan 8, 2024 | Jan 8, 2024 |
Showing 190 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Electric & Other Services Combined (SIC 4931)
- Listed as
- NWE (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Sioux Falls, SD
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1993004
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.