Otter Tail Corporation (OTTR) ownership: Top institutional holder: BlackRock, Inc. ($563.87M). Insider activity: Net Seller (3 buys, 17 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| BlackRock, Inc. | 6424374.00 | $563.87M | 2026-03-31 |
| VANGUARD GROUP INC | 5059480.00 | $408.86M | 2025-12-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 2947184.00 | $258.67M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 1865713.00 | $163.75M | 2026-03-31 |
| STATE STREET CORP | 1569348.00 | $137.74M | 2026-03-31 |
| GEODE CAPITAL MANAGEMENT, LLC | 1054887.00 | $92.61M | 2026-03-31 |
| LSV ASSET MANAGEMENT | 1042913.00 | $91.54M | 2026-03-31 |
| DIMENSIONAL FUND ADVISORS LP | 815241.00 | $71.55M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-04-13 | |
| Sell | null | 2026-04-13 | |
| Sell | null | 2026-04-13 | |
| Sell | null | 2026-04-13 | |
| Sell | null | 2026-04-13 | |
| Sell | null | 2026-04-13 | |
| Sell | null | 2026-04-13 | |
| Sell | null | 2026-04-13 |
Back to OTTR overview · OTTR earnings · All congressional trades
Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.