NorthWestern Energy Group, Inc. SEC filings NWE
NorthWestern Energy Group, Inc. has 317 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 Sep 9, 2026 (regulation fd disclosure). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 10-Q | Quarterly report | Nov 5, 2026 | Sep 30, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 9, 2026 | Sep 9, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jul 30, 2026 | Jul 29, 2026 |
| 10-Q | Quarterly report | Jul 30, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Material agreement, New debt
|
Jun 22, 2026 | Jun 15, 2026 |
| 8-K |
Current report
Material agreement, New debt
|
Jun 2, 2026 | May 27, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Jun 2, 2026 | Jun 2, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
May 27, 2026 | May 27, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
May 18, 2026 | May 18, 2026 |
| 8-K |
Current report
Shareholder vote results
|
May 5, 2026 | Apr 30, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Apr 30, 2026 | Apr 29, 2026 |
| 10-Q | Quarterly report | Apr 30, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Shareholder vote results, Other events
|
Apr 3, 2026 | Apr 2, 2026 |
| ANNLRPT | 2025 annual report | Mar 12, 2026 | Dec 31, 2025 |
| DEFA14A | Additional proxy material | Mar 12, 2026 | — |
| DEF 14A | Proxy statement | Mar 12, 2026 | Apr 30, 2026 |
| 8-K |
Current report
Officer or director change
|
Feb 17, 2026 | Feb 11, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Feb 12, 2026 | Feb 11, 2026 |
| 10-K | Annual report | Feb 12, 2026 | Dec 31, 2025 |
| DEFM14A | Filing | Feb 6, 2026 | — |
| 425 | Filing | Feb 6, 2026 | — |
| 425 | Filing | Jan 30, 2026 | — |
| 425 | 425 krtv interview transcript | Jan 22, 2026 | — |
| 425 | 425 sd bill insert january 2026 | Dec 29, 2025 | — |
| 425 | 425 ne bill insert jan 2026 | Dec 29, 2025 | — |
| 425 | 425 mt radio ads 2025 12 29 | Dec 29, 2025 | — |
| 425 | 425 bird the outlet transcript | Dec 23, 2025 | — |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Dec 9, 2025 | Dec 9, 2025 |
| 425 | 425 employee email re dec mt bill insert | Dec 3, 2025 | — |
| 425 | 425 december 2025 mt customer bill insert | Dec 3, 2025 | — |
| 8-K |
Current report
Material agreement, New debt
|
Nov 13, 2025 | Nov 7, 2025 |
| 425 | 425 mt pbs impact transcript excerpts | Nov 13, 2025 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 10, 2025 | Nov 10, 2025 |
| 425 | Filing | Nov 10, 2025 | — |
| 8-K |
Current report
Officer or director change
|
Oct 31, 2025 | Oct 27, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Oct 30, 2025 | Oct 29, 2025 |
| 10-Q | Quarterly report | Oct 30, 2025 | Sep 30, 2025 |
| 425 | Filing | Oct 28, 2025 | — |
| 425 | Filing | Oct 28, 2025 | — |
| 425 | 425 press release mt merger approval filing | Oct 21, 2025 | — |
| 8-K |
Current report
Material agreement, New debt
|
Oct 3, 2025 | Sep 29, 2025 |
| 425 | 425 voices of mt transcript | Sep 22, 2025 | — |
| 425 | 425 b of a interview transcript bird | Sep 11, 2025 | — |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Sep 3, 2025 | Sep 3, 2025 |
| 425 | 425 hh transcript | Aug 28, 2025 | — |
| 425 | 425 jh linkedin post | Aug 20, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | 425 nwe supplier business partner | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | 425 regulator elected official | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | 425 nwe people leader toolkit | Aug 19, 2025 | — |
| 425 | 425 nwe people leader cover email | Aug 19, 2025 | — |
| 425 | Filing | Aug 19, 2025 | — |
| 425 | 425 nwe leader comm toolkit | Aug 19, 2025 | — |
| 425 | 425 nwe employee faq | Aug 19, 2025 | — |
| 425 | 425 nwe customer email | Aug 19, 2025 | — |
| 425 | 425 analyst investor courtesy | Aug 19, 2025 | — |
| 425 | 425 nwe employee email | Aug 19, 2025 | — |
| 8-K |
Current report
Material agreement, Officer or director change, Bylaw or fiscal year change, Regulation FD disclosure
|
Aug 19, 2025 | Aug 18, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 19, 2025 | Aug 19, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jul 31, 2025 | Jul 30, 2025 |
| 10-Q | Quarterly report | Jul 31, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Jun 5, 2025 | Jun 5, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
May 28, 2025 | May 28, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
May 19, 2025 | May 19, 2025 |
| 8-K |
Current report
Material agreement, New debt
|
May 7, 2025 | May 1, 2025 |
| 8-K |
Current report
Shareholder vote results
|
May 5, 2025 | Apr 30, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Apr 30, 2025 | Apr 29, 2025 |
| 10-Q | Quarterly report | Apr 30, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Apr 10, 2025 | Apr 10, 2025 |
| 8-K |
Current report
Material agreement, New debt
|
Mar 27, 2025 | Mar 21, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Mar 25, 2025 | Mar 25, 2025 |
| ARS | Annual report to shareholders | Mar 12, 2025 | Dec 31, 2024 |
| DEFA14A | Additional proxy material | Mar 12, 2025 | — |
| DEF 14A | Proxy statement | Mar 12, 2025 | Apr 30, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Feb 13, 2025 | Feb 12, 2025 |
| 10-K | Annual report | Feb 13, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Officer or director change
|
Dec 19, 2024 | Dec 12, 2024 |
| 8-K |
Current report
Officer or director change
|
Nov 21, 2024 | Nov 20, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 8, 2024 | Nov 8, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Oct 30, 2024 | Oct 28, 2024 |
| 10-Q | Quarterly report | Oct 29, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 4, 2024 | Sep 4, 2024 |
| 8-K |
Current report
Officer or director change
|
Aug 9, 2024 | Aug 7, 2024 |
| 8-K |
Current report
Material agreement
|
Aug 2, 2024 | Jul 30, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jul 31, 2024 | Jul 30, 2024 |
| 10-Q | Quarterly report | Jul 31, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Jul 15, 2024 | Jul 15, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Jun 3, 2024 | Jun 3, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
May 20, 2024 | May 20, 2024 |
| 8-K |
Current report
Shareholder vote results
|
May 2, 2024 | Apr 26, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Apr 26, 2024 | Apr 25, 2024 |
| 10-Q | Quarterly report | Apr 26, 2024 | Mar 31, 2024 |
| 8-K |
Current report
Material agreement, New debt
|
Apr 18, 2024 | Apr 12, 2024 |
| 8-K |
Current report
Material agreement, New debt
|
Apr 3, 2024 | Mar 28, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Mar 21, 2024 | Mar 21, 2024 |
| ARS | Annual report to shareholders | Mar 6, 2024 | Dec 31, 2023 |
| DEFA14A | Additional proxy material | Mar 6, 2024 | — |
| DEF 14A | Proxy statement | Mar 6, 2024 | Apr 26, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Mar 5, 2024 | Mar 5, 2024 |
| 8-K |
Current report
Officer or director change
|
Feb 20, 2024 | Feb 14, 2024 |
| 8-K |
Current report
Results of operations
|
Feb 15, 2024 | Feb 14, 2024 |
| 10-K | Annual report | Feb 15, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Material agreement
|
Jan 2, 2024 | Dec 27, 2023 |
| 8-K |
Current report
Officer or director change
|
Dec 27, 2023 | Dec 20, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Dec 6, 2023 | Dec 6, 2023 |
| 8-K |
Current report
Material agreement, New debt
|
Dec 5, 2023 | Nov 29, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 13, 2023 | Nov 12, 2023 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Oct 27, 2023 | Oct 26, 2023 |
| 10-Q | Quarterly report | Oct 27, 2023 | Sep 30, 2023 |
| S-8 | Employee stock plan registration | Oct 3, 2023 | — |
| S-8 | Employee stock plan registration | Oct 3, 2023 | — |
| S-3ASR | Automatic shelf registration | Oct 2, 2023 | — |
| S-3ASR | Automatic shelf registration | Oct 2, 2023 | — |
| 8-K12G3 | Filing | Oct 2, 2023 | Oct 2, 2023 |
Showing 127 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.