373 institutions reported holding $2.57B of OTTER TAIL CORP (OTTR) in SEC 13F filings for 2026-03-31. Largest institutional holders: BlackRock, Inc. ($563.9M), VANGUARD PORTFOLIO MANAGEMENT LLC ($258.7M), VANGUARD CAPITAL MANAGEMENT LLC ($163.8M), STATE STREET CORP ($137.7M), GEODE CAPITAL MANAGEMENT, LLC ($92.6M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | BlackRock, Inc. | $563.9M | 6.4M | Added |
| 2 | VANGUARD PORTFOLIO MANAGEMENT LLC | $258.7M | 2.9M | New |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | $163.8M | 1.9M | New |
| 4 | STATE STREET CORP | $137.7M | 1.6M | Added |
| 5 | GEODE CAPITAL MANAGEMENT, LLC | $92.6M | 1.1M | Added |
| 6 | LSV ASSET MANAGEMENT | $91.5M | 1.0M | Added |
| 7 | DIMENSIONAL FUND ADVISORS LP | $71.6M | 815,241 | Trimmed |
| 8 | TWO SIGMA INVESTMENTS, LP | $58.2M | 662,934 | Added |
| 9 | MORGAN STANLEY | $57.4M | 654,434 | Added |
| 10 | FIRST TRUST ADVISORS LP | $53.2M | 606,504 | Trimmed |
| 11 | Caisse de depot et placement du Quebec | $50.0M | 569,933 | Added |
| 12 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $46.0M | 524,121 | Trimmed |
| 13 | GOLDMAN SACHS GROUP INC | $42.6M | 485,351 | Added |
| 14 | GABELLI FUNDS LLC | $41.0M | 467,200 | Trimmed |
| 15 | NORTHERN TRUST CORP | $37.9M | 432,012 | Added |
| 16 | D. E. Shaw & Co., Inc. | $35.1M | 399,426 | Added |
| 17 | Bank of New York Mellon Corp | $30.8M | 350,608 | Trimmed |
| 18 | ADAGE CAPITAL PARTNERS GP, L.L.C. | $30.0M | 342,000 | Trimmed |
| 19 | BANK OF AMERICA CORP /DE/ | $29.5M | 336,483 | Added |
| 20 | JPMORGAN CHASE & CO | $29.1M | 339,633 | Trimmed |
| 21 | VANGUARD FIDUCIARY TRUST CO | $23.9M | 272,408 | New |
| 22 | Qube Research & Technologies Ltd | $23.5M | 267,854 | Added |
| 23 | GAMCO INVESTORS, INC. ET AL | $23.2M | 264,800 | Trimmed |
| 24 | VICTORY CAPITAL MANAGEMENT INC | $22.2M | 252,376 | Added |
| 25 | PRINCIPAL FINANCIAL GROUP INC | $20.4M | 231,889 | Added |
Source: SEC Form 13F filings · as of 2026-03-31