Browse the latest SEC filings and forms submitted by NorthWestern Energy Group, Inc. (NWE). Access annual reports, quarterly statements, and other official disclosures.
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Search Company Filings →| Form | Filing Date | Description | Link |
|---|---|---|---|
| SCHEDULE 13G/A | March 27, 2026 | - | View Document |
| DEF 14A | March 12, 2026 | DEF 14A | View Document |
| ANNLRPT | March 12, 2026 | 2025 ANNUAL REPORT | View Document |
| DEFA14A | March 12, 2026 | DEFA14A | View Document |
| 4 | March 3, 2026 | FORM 4 | View Document |
| 4 | March 2, 2026 | FORM 4 | View Document |
| 4 | March 2, 2026 | FORM 4 | View Document |
| 4 | March 2, 2026 | FORM 4 | View Document |
| 4 | March 2, 2026 | FORM 4 | View Document |
| 4 | March 2, 2026 | FORM 4 | View Document |
| 4 | March 2, 2026 | FORM 4 | View Document |
| 4 | March 2, 2026 | FORM 4 | View Document |
| 4 | March 2, 2026 | FORM 4 | View Document |
| 4 | March 2, 2026 | FORM 4 | View Document |
| 4 | Feb. 25, 2026 | FORM 4 | View Document |
| 4 | Feb. 25, 2026 | FORM 4 | View Document |
| 4 | Feb. 25, 2026 | FORM 4 | View Document |
| 4 | Feb. 25, 2026 | FORM 4 | View Document |
| 4 | Feb. 25, 2026 | FORM 4 | View Document |
| 4 | Feb. 25, 2026 | FORM 4 | View Document |
| 8-K | Feb. 17, 2026 | 8-K | View Document |
| 8-K | Feb. 12, 2026 | 8-K | View Document |
| 10-K | Feb. 12, 2026 | 10-K | View Document |
| DEFM14A | Feb. 6, 2026 | DEFM14A | View Document |
| 425 | Feb. 6, 2026 | 425 | View Document |
| 4 | Feb. 4, 2026 | FORM 4 | View Document |
| 4 | Feb. 4, 2026 | FORM 4 | View Document |
| 425 | Jan. 30, 2026 | 425 | View Document |
| 4 | Jan. 26, 2026 | FORM 4 | View Document |
| 4 | Jan. 23, 2026 | FORM 4 | View Document |
| 4 | Jan. 23, 2026 | FORM 4 | View Document |
| 4 | Jan. 23, 2026 | FORM 4 | View Document |
| 4 | Jan. 23, 2026 | FORM 4 | View Document |
| 4 | Jan. 23, 2026 | FORM 4 | View Document |
| 4 | Jan. 23, 2026 | FORM 4 | View Document |
| 4 | Jan. 23, 2026 | FORM 4 | View Document |
| 425 | Jan. 22, 2026 | 425 KRTV INTERVIEW TRANSCRIPT | View Document |
| 4 | Jan. 20, 2026 | FORM 4 | View Document |
| 4 | Jan. 20, 2026 | FORM 4 | View Document |
| 4 | Jan. 6, 2026 | FORM 4 | View Document |
| 4 | Jan. 6, 2026 | FORM 4 | View Document |
| 4 | Jan. 6, 2026 | FORM 4 | View Document |
| 4 | Jan. 6, 2026 | FORM 4 | View Document |
| 4 | Jan. 6, 2026 | FORM 4 | View Document |
| 4 | Jan. 6, 2026 | FORM 4 | View Document |
| 425 | Dec. 29, 2025 | 425 MT RADIO ADS 2025 12 29 | View Document |
| 425 | Dec. 29, 2025 | 425 NE BILL INSERT JAN 2026 | View Document |
| 425 | Dec. 29, 2025 | 425 SD BILL INSERT JANUARY 2026 | View Document |
| 425 | Dec. 23, 2025 | 425 BIRD THE OUTLET TRANSCRIPT | View Document |
| 4 | Dec. 19, 2025 | FORM 4 | View Document |
| 8-K | Dec. 9, 2025 | 8-K | View Document |
| 425 | Dec. 3, 2025 | 425 EMPLOYEE EMAIL RE DEC MT BILL INSERT | View Document |
| 425 | Dec. 3, 2025 | 425 DECEMBER 2025 MT CUSTOMER BILL INSERT | View Document |
| 425 | Nov. 13, 2025 | 425 MT PBS IMPACT TRANSCRIPT EXCERPTS | View Document |
| 8-K | Nov. 13, 2025 | 8-K | View Document |
| 425 | Nov. 10, 2025 | 425 | View Document |
| 8-K | Nov. 10, 2025 | 8-K | View Document |
| 4 | Nov. 5, 2025 | FORM 4 | View Document |
| 4 | Nov. 5, 2025 | FORM 4 | View Document |
| 8-K | Oct. 31, 2025 | 8-K | View Document |
| 8-K | Oct. 30, 2025 | 8-K | View Document |
| 10-Q | Oct. 30, 2025 | 10-Q | View Document |
| 425 | Oct. 28, 2025 | 425 | View Document |
| 425 | Oct. 28, 2025 | 425 | View Document |
| 425 | Oct. 21, 2025 | 425 PRESS RELEASE MT MERGER APPROVAL FILING | View Document |
| 4 | Oct. 7, 2025 | FORM 4 | View Document |
| 4 | Oct. 7, 2025 | FORM 4 | View Document |
| 4 | Oct. 7, 2025 | FORM 4 | View Document |
| 4 | Oct. 7, 2025 | FORM 4 | View Document |
| 4 | Oct. 7, 2025 | FORM 4 | View Document |
| 4 | Oct. 7, 2025 | FORM 4 | View Document |
| 8-K | Oct. 3, 2025 | 8-K | View Document |
| 425 | Sept. 22, 2025 | 425 VOICES OF MT TRANSCRIPT | View Document |
| 425 | Sept. 11, 2025 | 425 B OF A INTERVIEW TRANSCRIPT BIRD | View Document |
| 8-K | Sept. 3, 2025 | 8-K | View Document |
| 425 | Aug. 28, 2025 | 425 HH TRANSCRIPT | View Document |
| 425 | Aug. 20, 2025 | 425 JH LINKEDIN POST | View Document |
| 425 | Aug. 19, 2025 | 425 | View Document |
| 425 | Aug. 19, 2025 | 425 | View Document |
| 425 | Aug. 19, 2025 | 425 NWE SUPPLIER BUSINESS PARTNER | View Document |
| 425 | Aug. 19, 2025 | 425 REGULATOR ELECTED OFFICIAL | View Document |
| 425 | Aug. 19, 2025 | 425 NWE PEOPLE LEADER TOOLKIT | View Document |
| 425 | Aug. 19, 2025 | 425 NWE PEOPLE LEADER COVER EMAIL | View Document |
| 425 | Aug. 19, 2025 | 425 NWE LEADER COMM TOOLKIT | View Document |
| 425 | Aug. 19, 2025 | 425 NWE EMPLOYEE FAQ | View Document |
| 425 | Aug. 19, 2025 | 425 NWE CUSTOMER EMAIL | View Document |
| 425 | Aug. 19, 2025 | 425 ANALYST INVESTOR COURTESY | View Document |
| 425 | Aug. 19, 2025 | 425 NWE EMPLOYEE EMAIL | View Document |
| 8-K | Aug. 19, 2025 | 8-K | View Document |
| 8-K | Aug. 19, 2025 | 8-K | View Document |
| 425 | Aug. 19, 2025 | 425 | View Document |
| 425 | Aug. 19, 2025 | 425 | View Document |
| 425 | Aug. 19, 2025 | 425 | View Document |
| 425 | Aug. 19, 2025 | 425 | View Document |
| 425 | Aug. 19, 2025 | 425 | View Document |
| 425 | Aug. 19, 2025 | 425 | View Document |
| 425 | Aug. 19, 2025 | 425 | View Document |
| 425 | Aug. 19, 2025 | 425 | View Document |
| 425 | Aug. 19, 2025 | 425 | View Document |
| 425 | Aug. 19, 2025 | 425 | View Document |
| 425 | Aug. 19, 2025 | 425 | View Document |
| 425 | Aug. 19, 2025 | 425 | View Document |
| 425 | Aug. 19, 2025 | 425 | View Document |
| SCHEDULE 13G/A | Aug. 14, 2025 | - | View Document |
| 4 | Aug. 4, 2025 | FORM 4 | View Document |
| 4 | Aug. 4, 2025 | FORM 4 | View Document |
| 8-K | July 31, 2025 | 8-K | View Document |
| 10-Q | July 31, 2025 | 10-Q | View Document |
| 4 | July 9, 2025 | FORM 4 | View Document |
| 4 | July 7, 2025 | FORM 4 | View Document |
| 4 | July 7, 2025 | FORM 4 | View Document |
| 4 | July 7, 2025 | FORM 4 | View Document |
| 4 | July 7, 2025 | FORM 4 | View Document |
| 4 | July 7, 2025 | FORM 4 | View Document |
| 8-K | June 5, 2025 | 8-K | View Document |
| 8-K | May 28, 2025 | 8-K | View Document |
| 8-K | May 19, 2025 | 8-K | View Document |
| 8-K | May 7, 2025 | 8-K | View Document |
| 4 | May 6, 2025 | FORM 4 | View Document |
| 8-K | May 5, 2025 | 8-K | View Document |
| 4 | May 5, 2025 | FORM 4 | View Document |
| 4 | May 2, 2025 | FORM 4 | View Document |
| 144 | May 2, 2025 | - | View Document |
| 10-Q | April 30, 2025 | 10-Q | View Document |
| 8-K | April 30, 2025 | 8-K | View Document |
| 8-K | April 10, 2025 | 8-K | View Document |
| 4 | April 7, 2025 | FORM 4 | View Document |
| 4 | April 7, 2025 | FORM 4 | View Document |
| 4 | April 7, 2025 | FORM 4 | View Document |
| 4 | April 7, 2025 | FORM 4 | View Document |
| 4 | April 7, 2025 | FORM 4 | View Document |
| 4 | April 7, 2025 | FORM 4 | View Document |
| 8-K | March 27, 2025 | 8-K | View Document |
| 8-K | March 25, 2025 | 8-K | View Document |
| DEFA14A | March 12, 2025 | DEFA14A | View Document |
| DEF 14A | March 12, 2025 | DEF 14A | View Document |
| ARS | March 12, 2025 | ARS NWE ANNUAL REPORT (FILED 2025) | View Document |
| 4 | March 10, 2025 | FORM 4 | View Document |
| 4 | March 10, 2025 | FORM 4 | View Document |
| 4 | March 10, 2025 | FORM 4 | View Document |
| 4 | March 5, 2025 | FORM 4 | View Document |
| 4 | March 5, 2025 | FORM 4 | View Document |
| 4 | March 5, 2025 | FORM 4 | View Document |
| 4 | March 5, 2025 | FORM 4 | View Document |
| 4 | March 5, 2025 | FORM 4 | View Document |
| 4 | March 5, 2025 | FORM 4 | View Document |
| 4 | March 5, 2025 | FORM 4 | View Document |
| 4 | March 5, 2025 | FORM 4 | View Document |
| 4 | March 5, 2025 | FORM 4 | View Document |
| 4 | Feb. 26, 2025 | FORM 4 | View Document |
| 144 | Feb. 25, 2025 | - | View Document |
| SCHEDULE 13G/A | Feb. 14, 2025 | - | View Document |
| 10-K | Feb. 13, 2025 | 10-K | View Document |
| 8-K | Feb. 13, 2025 | 8-K | View Document |
| 4 | Feb. 6, 2025 | FORM 4 | View Document |
| 4 | Feb. 6, 2025 | FORM 4 | View Document |
| 4 | Jan. 6, 2025 | FORM 4 | View Document |
| 4 | Jan. 6, 2025 | FORM 4 | View Document |
| 4 | Jan. 6, 2025 | FORM 4 | View Document |
| 4 | Jan. 6, 2025 | FORM 4 | View Document |
| 4 | Jan. 6, 2025 | FORM 4 | View Document |
| 4 | Jan. 6, 2025 | FORM 4 | View Document |
| 8-K | Dec. 19, 2024 | 8-K | View Document |
| 4 | Dec. 13, 2024 | FORM 4 | View Document |
| 144 | Dec. 12, 2024 | - | View Document |
| 4 | Dec. 9, 2024 | FORM 4 | View Document |
| 144 | Dec. 9, 2024 | - | View Document |
| 4 | Dec. 4, 2024 | FORM 4 | View Document |
| 3 | Dec. 2, 2024 | FORM 3 | View Document |
| 8-K | Nov. 21, 2024 | 8-K | View Document |
| SC 13G/A | Nov. 8, 2024 | SC 13G/A | View Document |
| SC 13G/A | Nov. 8, 2024 | - | View Document |
| 8-K | Nov. 8, 2024 | 8-K | View Document |
| 4 | Nov. 4, 2024 | FORM 4 | View Document |
| 8-K | Oct. 30, 2024 | 8-K | View Document |
| 10-Q | Oct. 29, 2024 | 10-Q | View Document |
| SC 13G/A | Oct. 18, 2024 | - | View Document |
| 4 | Oct. 2, 2024 | FORM 4 | View Document |
| 4 | Oct. 2, 2024 | FORM 4 | View Document |
| 4 | Oct. 2, 2024 | FORM 4 | View Document |
| 4 | Oct. 2, 2024 | FORM 4 | View Document |
| 4 | Oct. 2, 2024 | FORM 4 | View Document |
| 4 | Oct. 2, 2024 | FORM 4 | View Document |
| 4 | Oct. 2, 2024 | FORM 4 | View Document |
| 8-K | Sept. 4, 2024 | 8-K | View Document |
| 8-K | Aug. 9, 2024 | 8-K | View Document |
| 4 | Aug. 8, 2024 | FORM 4 | View Document |
| 4 | Aug. 5, 2024 | FORM 4 | View Document |
| 8-K | Aug. 2, 2024 | 8-K | View Document |
| 10-Q | July 31, 2024 | 10-Q | View Document |
| 8-K | July 31, 2024 | 8-K | View Document |
| 8-K | July 15, 2024 | 8-K | View Document |
| 4 | July 2, 2024 | FORM 4 | View Document |
| 4 | July 2, 2024 | FORM 4 | View Document |
| 4 | July 2, 2024 | FORM 4 | View Document |
| 4 | July 2, 2024 | FORM 4 | View Document |
| 4 | July 2, 2024 | FORM 4 | View Document |
| 4 | July 2, 2024 | FORM 4 | View Document |
| 4 | July 2, 2024 | FORM 4 | View Document |
| 8-K | June 3, 2024 | 8-K | View Document |
| 8-K | May 20, 2024 | 8-K | View Document |
| 4 | May 8, 2024 | FORM 4 | View Document |
| 144 | May 7, 2024 | - | View Document |
| 4 | May 6, 2024 | FORM 4 | View Document |
| 144 | May 3, 2024 | - | View Document |
| 4 | May 3, 2024 | FORM 4 | View Document |
| 8-K | May 2, 2024 | 8-K | View Document |
| 4 | May 1, 2024 | FORM 4 | View Document |
| 144 | May 1, 2024 | - | View Document |
| 10-Q | April 26, 2024 | 10-Q | View Document |
| 8-K | April 26, 2024 | 8-K | View Document |
| 8-K | April 18, 2024 | 8-K | View Document |
| 8-K | April 3, 2024 | 8-K | View Document |
| 4 | April 2, 2024 | FORM 4 | View Document |
| 4 | April 2, 2024 | FORM 4 | View Document |
| 4 | April 2, 2024 | FORM 4 | View Document |
| 4 | April 2, 2024 | FORM 4 | View Document |
| 4 | April 2, 2024 | FORM 4 | View Document |
| 4 | April 2, 2024 | FORM 4 | View Document |
| 4 | April 2, 2024 | FORM 4 | View Document |
| 4 | April 2, 2024 | FORM 4 | View Document |
| 8-K | March 21, 2024 | 8-K | View Document |
| 4 | March 14, 2024 | FORM 4 | View Document |
| 4 | March 14, 2024 | FORM 4 | View Document |
| 4 | March 14, 2024 | FORM 4 | View Document |
| 4 | March 14, 2024 | FORM 4 | View Document |
| 4 | March 14, 2024 | FORM 4 | View Document |
| 4 | March 14, 2024 | FORM 4 | View Document |
| 4 | March 14, 2024 | FORM 4 | View Document |
| 4 | March 14, 2024 | FORM 4 | View Document |
| 4 | March 14, 2024 | FORM 4 | View Document |
| 4 | March 14, 2024 | FORM 4 | View Document |
| 4 | March 14, 2024 | FORM 4 | View Document |
| DEFA14A | March 6, 2024 | DEFA14A | View Document |
| 4 | March 6, 2024 | FORM 4 | View Document |
| 4 | March 6, 2024 | FORM 4 | View Document |
| 4 | March 6, 2024 | FORM 4 | View Document |
| 4 | March 6, 2024 | FORM 4 | View Document |
| 4 | March 6, 2024 | FORM 4 | View Document |
| 4 | March 6, 2024 | FORM 4 | View Document |
| 4 | March 6, 2024 | FORM 4 | View Document |
| 4 | March 6, 2024 | FORM 4 | View Document |
| 4 | March 6, 2024 | FORM 4 | View Document |
| ARS | March 6, 2024 | ARS NWE ANNUAL REPORT (FILED 2024) | View Document |
| DEF 14A | March 6, 2024 | DEF 14A | View Document |
| 4 | March 5, 2024 | FORM 4 | View Document |
| 8-K | March 5, 2024 | 8-K | View Document |
| 4 | Feb. 27, 2024 | FORM 4 | View Document |
| 4 | Feb. 21, 2024 | FORM 4 | View Document |
| 8-K | Feb. 20, 2024 | 8-K | View Document |
| 8-K | Feb. 15, 2024 | 8-K | View Document |
| 10-K | Feb. 15, 2024 | 10-K | View Document |
| SC 13G/A | Feb. 12, 2024 | SC 13G/A | View Document |
| 4 | Feb. 7, 2024 | FORM 4 | View Document |
| SC 13G/A | Jan. 22, 2024 | - | View Document |
| 4 | Jan. 8, 2024 | FORM 4 | View Document |
| 4 | Jan. 8, 2024 | FORM 4 | View Document |
| 4 | Jan. 8, 2024 | FORM 4 | View Document |
| 4 | Jan. 8, 2024 | FORM 4 | View Document |
| 4 | Jan. 8, 2024 | FORM 4 | View Document |
| 4 | Jan. 8, 2024 | FORM 4 | View Document |
| 4 | Jan. 8, 2024 | FORM 4 | View Document |
| 4 | Jan. 8, 2024 | FORM 4 | View Document |
| 8-K | Jan. 2, 2024 | 8-K | View Document |
| 8-K | Dec. 27, 2023 | 8-K | View Document |
| 8-K | Dec. 6, 2023 | 8-K | View Document |
| 8-K | Dec. 5, 2023 | 8-K | View Document |
| 8-K | Nov. 13, 2023 | 8-K | View Document |
| 8-K | Oct. 27, 2023 | 8-K | View Document |
| 10-Q | Oct. 27, 2023 | 10-Q | View Document |
| S-8 | Oct. 3, 2023 | S-8 | View Document |
| S-8 | Oct. 3, 2023 | S-8 | View Document |
| 8-K12G3 | Oct. 2, 2023 | 8-K12G3 | View Document |
| S-3ASR | Oct. 2, 2023 | S-3ASR | View Document |
| S-3ASR | Oct. 2, 2023 | S-3ASR | View Document |