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 | 15.62 | 6,557,596 | +2.1 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 7.14 | 2,996,322 | +1.7 | 06/30/2026 |
| Vanguard Capital Management, LLC | 4.50 | 1,891,243 | +1.4 | 06/30/2026 |
| State Street Corp | 3.92 | 1,645,782 | +4.9 | 06/30/2026 |
| LSV Asset Management | 2.83 | 1,186,461 | +13.8 | 06/30/2026 |
| Geode Capital Management, LLC | 2.65 | 1,112,886 | +5.5 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 5.99 | 2,516,368 | +0.1 | 10/28/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 3.21 | 1,347,074 | +0.5 | 09/30/2026 |
| iShares Russell 2000 ETF | 2.36 | 991,547 | -0.4 | 10/29/2026 |
| Vanguard Small Cap Index | 2.25 | 943,798 | -2.4 | 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 |
|---|---|---|---|---|---|
| Knutson Paul L | VP, Human Resources | 20,770 | 1,628,368 $ | 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: November 6, 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.