NorthWestern Energy Group, Inc. — All Filings
277 total filings on record
Public companies registered with the SEC are required to file periodic reports, disclosures, and notices throughout the year. The most important are the 10-K (annual report), 10-Q (quarterly report), and 8-K (material event notice). Use the filters below to narrow by form type.
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144
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4
425
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S-3ASR
S-8
SC 13G/A
SCHEDULE 13G/A
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| 425 | 425 DECEMBER 2025 MT CUSTOMER BILL INSERT | 0001993004-25-000200 | Dec 3, 2025 | — |
| 425 | 425 MT PBS IMPACT TRANSCRIPT EXCERPTS | 0001993004-25-000195 | Nov 13, 2025 | — |
| 8-K | 8-K | 0001993004-25-000196 | Nov 13, 2025 | Nov 7, 2025 |
| 8-K | 8-K | 0001993004-25-000192 | Nov 10, 2025 | — |
| 4 | FORM 4 | 0001730877-25-000008 | Nov 5, 2025 | Nov 4, 2025 |
| 4 | FORM 4 | 0001244563-25-000004 | Nov 5, 2025 | Nov 4, 2025 |
| 8-K | 8-K | 0001993004-25-000190 | Oct 31, 2025 | Oct 27, 2025 |
| 8-K | 8-K | 0001993004-25-000186 | Oct 30, 2025 | Oct 29, 2025 |
| 10-Q | 10-Q | 0001993004-25-000184 | Oct 30, 2025 | Sep 30, 2025 |
| 425 | 425 | 0001993004-25-000181 | Oct 28, 2025 | — |
| 425 | 425 | 0001993004-25-000182 | Oct 28, 2025 | — |
| 425 | 425 PRESS RELEASE MT MERGER APPROVAL FILING | 0001993004-25-000176 | Oct 21, 2025 | — |
| 4 | FORM 4 | 0001634403-25-000005 | Oct 7, 2025 | Oct 6, 2025 |
| 4 | FORM 4 | 0001182496-25-000005 | Oct 7, 2025 | Oct 6, 2025 |
| 4 | FORM 4 | 0001428704-25-000006 | Oct 7, 2025 | Oct 6, 2025 |
| 4 | FORM 4 | 0001328106-25-000005 | Oct 7, 2025 | Oct 6, 2025 |
| 4 | FORM 4 | 0001931208-25-000012 | Oct 7, 2025 | Oct 6, 2025 |
| 4 | FORM 4 | 0001530618-25-000004 | Oct 7, 2025 | Oct 6, 2025 |
| 8-K | 8-K | 0001993004-25-000174 | Oct 3, 2025 | Sep 29, 2025 |
| 425 | 425 VOICES OF MT TRANSCRIPT | 0001993004-25-000172 | Sep 22, 2025 | — |
| 425 | 425 B OF A INTERVIEW TRANSCRIPT BIRD | 0001993004-25-000170 | Sep 11, 2025 | — |
| 8-K | 8-K | 0001993004-25-000166 | Sep 3, 2025 | — |
| 425 | 425 HH TRANSCRIPT | 0001993004-25-000163 | Aug 28, 2025 | — |
| 425 | 425 JH LINKEDIN POST | 0001993004-25-000159 | Aug 20, 2025 | — |
| 425 | 425 | 0001993004-25-000156 | Aug 19, 2025 | — |
| 425 | 425 NWE SUPPLIER BUSINESS PARTNER | 0001993004-25-000155 | Aug 19, 2025 | — |
| 425 | 425 NWE EMPLOYEE EMAIL | 0001993004-25-000147 | Aug 19, 2025 | — |
| 8-K | 8-K | 0001993004-25-000143 | Aug 19, 2025 | Aug 18, 2025 |
| 425 | 425 NWE EMPLOYEE FAQ | 0001993004-25-000150 | Aug 19, 2025 | — |
| 425 | 425 ANALYST INVESTOR COURTESY | 0001993004-25-000148 | Aug 19, 2025 | — |
| 425 | 425 NWE CUSTOMER EMAIL | 0001993004-25-000149 | Aug 19, 2025 | — |
| 425 | 425 NWE LEADER COMM TOOLKIT | 0001993004-25-000151 | Aug 19, 2025 | — |
| 425 | 425 NWE PEOPLE LEADER COVER EMAIL | 0001993004-25-000152 | Aug 19, 2025 | — |
| 425 | 425 NWE PEOPLE LEADER TOOLKIT | 0001993004-25-000153 | Aug 19, 2025 | — |
| 425 | 425 REGULATOR ELECTED OFFICIAL | 0001993004-25-000154 | Aug 19, 2025 | — |
| 8-K | 8-K | 0001993004-25-000130 | Aug 19, 2025 | — |
| SCHEDULE 13G/A | — | 0000052388-25-000170 | Aug 14, 2025 | — |
| 4 | FORM 4 | 0001993004-25-000126 | Aug 4, 2025 | Aug 1, 2025 |
| 4 | FORM 4 | 0001993004-25-000124 | Aug 4, 2025 | Aug 1, 2025 |
| 10-Q | 10-Q | 0001993004-25-000121 | Jul 31, 2025 | Jun 30, 2025 |
| 8-K | 8-K | 0001993004-25-000122 | Jul 31, 2025 | Jul 30, 2025 |
| 4 | FORM 4 | 0001931208-25-000005 | Jul 9, 2025 | Jul 1, 2025 |
| 4 | FORM 4 | 0001993004-25-000114 | Jul 7, 2025 | Jul 1, 2025 |
| 4 | FORM 4 | 0001993004-25-000113 | Jul 7, 2025 | Jul 1, 2025 |
| 4 | FORM 4 | 0001993004-25-000117 | Jul 7, 2025 | Jul 1, 2025 |
| 4 | FORM 4 | 0001993004-25-000115 | Jul 7, 2025 | Jul 1, 2025 |
| 4 | FORM 4 | 0001993004-25-000116 | Jul 7, 2025 | Jul 1, 2025 |
| 8-K | 8-K | 0001993004-25-000105 | Jun 5, 2025 | — |
| 8-K | 8-K | 0001993004-25-000102 | May 28, 2025 | — |
| 8-K | 8-K | 0001993004-25-000098 | May 19, 2025 | — |