NorthWestern Corporation
Ownership
Ownership Structure
Who owns NorthWestern Corporation (NWE)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 99.4% of the shares are freely tradable; institutional investors hold 100.6%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 14.74 | 9,070,752 | +9.5 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 5.77 | 3,548,697 | +1.7 | 06/30/2026 |
| Vanguard Capital Management, LLC | 4.54 | 2,790,136 | +0.3 | 06/30/2026 |
| State Street Corp | 3.95 | 2,431,546 | +4.1 | 06/30/2026 |
| Geode Capital Management, LLC | 2.91 | 1,788,900 | +5.6 | 06/30/2026 |
| Franklin Templeton Inc | 2.57 | 1,581,525 | -2.5 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Mid-Cap ETF | 3.56 | 2,192,714 | +0.0 | 09/30/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 3.20 | 1,966,449 | +0.4 | 09/30/2026 |
| iShares Russell 2000 ETF | 2.65 | 1,631,841 | -1.1 | 09/30/2026 |
| Franklin Utilities A1 | 2.28 | 1,400,000 | +0.0 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Sullivan Linda G | Director | 35,563 | 2,855,709 $ | Oct 1, 2026 | direct |
| Yingling Jeffrey W. | Director | 25,121 | 2,017,216 $ | Oct 1, 2026 | direct |
| Yazdi Mahvash | Director | 23,603 | 1,895,321 $ | Oct 1, 2026 | direct |
| Ide Britt E | Director | 16,217 | 1,302,225 $ | Oct 1, 2026 | direct |
| Larson Kent T | Director | 12,589 | 1,010,897 $ | Oct 1, 2026 | direct |
| Horsfall Jan Robert | Director | 12,261 | 984,558 $ | Oct 1, 2026 | direct |
| Edwards Sherina M. | Director | 10,526 | 845,238 $ | Oct 1, 2026 | direct |
| Goodin David L | Director | 6,172 | 495,612 $ | Oct 1, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 1, 2026 | Edwards Sherina M. | Director | Other | 548 | 68.38 | 37,472 |
| Oct 1, 2026 | Yingling Jeffrey W. | Director | Other | 548 | 68.38 | 37,472 |
| Oct 1, 2026 | Ide Britt E | Director | Other | 548 | 68.38 | 37,472 |
| Oct 1, 2026 | Larson Kent T | Director | Other | 548 | 68.38 | 37,472 |
| Oct 1, 2026 | Goodin David L | Director | Other | 548 | 68.38 | 37,472 |
| Oct 1, 2026 | Sullivan Linda G | Director | Other | 804 | 68.38 | 54,978 |
| Oct 1, 2026 | Horsfall Jan Robert | Director | Other | 548 | 68.38 | 37,472 |
| Oct 1, 2026 | Yazdi Mahvash | Director | Other | 548 | 68.38 | 37,472 |
| Aug 6, 2026 | Horsfall Jan Robert | Director | Other | 524 | 71.62 | 37,529 |
| Aug 4, 2026 | Yingling Jeffrey W. | Director | Other | 524 | 71.62 | 37,529 |
| Jul 9, 2026 | Edwards Sherina M. | Director | Other | 524 | 71.62 | 37,529 |
| Jul 9, 2026 | Ide Britt E | Director | Other | 524 | 71.62 | 37,529 |
| Jul 9, 2026 | Larson Kent T | Director | Other | 524 | 71.62 | 37,529 |
| Jul 9, 2026 | Goodin David L | Director | Other | 524 | 71.62 | 37,529 |
| Jul 9, 2026 | Sullivan Linda G | Director | Other | 768 | 71.62 | 55,004 |
| Jul 6, 2026 | Yazdi Mahvash | Director | Other | 524 | 71.62 | 37,529 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: November 2, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.