NorthWestern Energy Group, Inc.
NWE- Exchange
- Nasdaq
- Industry
- Electric & Other Services Combined
- SEC CIK
- 0001993004
No open-market purchases or sales by NorthWestern Energy Group, Inc. insiders were filed in the last 90 days; 376 institutions reported holding it in 13F filings for Q2 2026, worth $4.21B in total; no superinvestor holds it.
Holders of 5% or more of NWE
Holders whose latest Schedule 13D or 13G filing reports 5% or more of NorthWestern Energy Group, Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 13G/A | 13.00%7.98M shares | −5.10 ppfrom 18.10% | Feb 5, 20252 filings | Apr 3, 2025 | SEC |
| Vanguard Portfolio Management LLC | 13G | 5.71%3.51M shares | New | Apr 29, 20261 filing | Apr 29, 2026 | SEC |
| Vanguard Capital Management LLC | 13G | 5.32%3.27M shares | New | Apr 30, 20261 filing | Apr 30, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
7 Schedule 13D and 13G filings on NorthWestern Energy Group, Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Apr 30, 202611:28 AM ET | Vanguard Capital Management LLC | 13G | 5.32%3.27M shares | New | Mar 31, 2026 | SEC |
| Apr 29, 20262:34 PM ET | Vanguard Portfolio Management LLC | 13G | 5.71%3.51M shares | New | Mar 31, 2026 | SEC |
| Mar 27, 202611:08 AM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | –Below 5% | Mar 13, 2026 | SEC |
| Aug 14, 20258:35 AM ET | American Century Investment Management Incand 2 others | 13G/A | 4.80%2.95M shares | −1.10 ppfrom 5.90%Below 5% | Jun 30, 2025 | SEC |
| Apr 3, 20252:19 PM ET | BlackRock, Inc. | 13G/A | 13.00%7.98M shares | −5.10 ppfrom 18.10% | Mar 31, 2025 | SEC |
| Feb 14, 20258:43 AM ET | American Century Investment Management Incand 2 others | 13G/A | 5.90%3.61M shares | – | Dec 31, 2024 | SEC |
| Feb 5, 20255:28 PM ET | BlackRock, Inc. | 13G/A | 18.10%11.1M shares | – | Dec 31, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell NorthWestern Energy Group, Inc. shares.
No Form 144 notices for NorthWestern Energy Group, Inc. are on file.