Otter Tail Corporation
Ownership
Ownership Structure
Who owns Otter Tail Corporation (OTTR)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 98.0% of the shares are freely tradable; institutional investors hold 78.5%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 15.30 | 6,424,374 | +0.5 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 7.02 | 2,947,184 | +0.0 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.44 | 1,865,713 | +0.0 | 03/31/2026 |
| State Street Corp | 3.74 | 1,569,348 | +0.5 | 03/31/2026 |
| LSV Asset Management | 2.83 | 1,186,461 | +13.8 | 06/30/2026 |
| Geode Capital Management, LLC | 2.51 | 1,054,887 | +3.5 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 6.09 | 2,558,521 | +0.0 | 08/31/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 3.20 | 1,343,210 | +0.5 | 07/31/2026 |
| iShares Russell 2000 ETF | 2.37 | 993,516 | -0.6 | 08/31/2026 |
| Vanguard Small Cap Index | 2.30 | 965,165 | +0.2 | 07/31/2026 |
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 |
|---|---|---|---|---|---|
| Knutson Paul L | VP, Human Resources | 20,770 | 1,815,298 $ | Aug 7, 2026 | both |
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 |
|---|---|---|---|---|---|---|
| Aug 11, 2026 | Knutson Paul L | VP, Human Resources | Sell | 475 | 94.63 | 44,949 |
| Aug 10, 2026 | Knutson Paul L | VP, Human Resources | Sell | 250 | 92.84 | 23,210 |
| Aug 7, 2026 | Knutson Paul L | VP, Human Resources | Other | 250 | 0.00 | – |
| Aug 7, 2026 | Knutson Paul L | VP, Human Resources | Other | 475 | 0.00 | – |
| Aug 7, 2026 | Knutson Paul L | VP, Human Resources | Other | 725 | 0.00 | – |
| Aug 7, 2026 | Knutson Paul L | VP, Human Resources | Sell | 3,500 | 93.11 | 325,885 |
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: September 18, 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.