OTTR - CIK 0001466593
Otter Tail Corp has filed 865 documents with the SEC between 2009 and 2026. The most frequent type is insider trade (458 filings), alongside the regular cadence of annual reports, quarterly reports, and event disclosures every public company must make. Use the filters to focus on one filing type, or flip the sort to trace the company's history from its earliest paperwork.
Data parsed from SEC EDGAR XBRL filings. See the full market cap rankings.
| Filing | Type | Filed | Period covered |
|---|---|---|---|
| Major company event | 8-K | 2026-05-15 | 2026-05-15 |
| Quarterly report | 10-Q | 2026-05-06 | 2026-03-31 |
| Major company event | 8-K | 2026-05-05 | 2026-05-04 |
| SCHEDULE 13G | - | 2026-04-30 | - |
| SCHEDULE 13G | - | 2026-04-29 | - |
| Insider trade | 4 | 2026-04-15 | 2026-04-13 |
| Insider trade | 4 | 2026-04-15 | 2026-04-13 |
| Insider trade | 4 | 2026-04-15 | 2026-04-13 |
| Insider trade | 4 | 2026-04-15 | 2026-04-13 |
| Major company event | 8-K | 2026-04-15 | 2026-04-13 |
| New insider ownership | 3 | 2026-04-14 | 2026-04-13 |
| Insider trade | 4 | 2026-04-14 | 2026-04-13 |
| Insider trade | 4 | 2026-04-14 | 2026-04-13 |
| Insider trade | 4 | 2026-04-14 | 2026-04-13 |
| Insider trade | 4 | 2026-04-14 | 2026-04-13 |
| Insider trade | 4 | 2026-04-14 | 2026-04-13 |
| Major company event | 8-K | 2026-04-14 | 2026-04-13 |
| Insider trade | 4 | 2026-04-14 | 2026-04-13 |
| Insider trade | 4 | 2026-04-14 | 2026-04-13 |
| Insider trade | 4 | 2026-04-14 | 2026-04-13 |
| Insider trade | 4 | 2026-04-14 | 2026-04-13 |
| Insider trade | 4 | 2026-04-09 | 2026-04-08 |
| SCHEDULE 13G/A | - | 2026-03-27 | - |
| Major company event | 8-K | 2026-03-23 | 2026-03-19 |
| Annual report to shareholders | ARS | 2026-03-02 | 2025-12-31 |
| Proxy materials | DEFA14A | 2026-03-02 | - |
| Proxy statement | DEF 14A | 2026-03-02 | 2026-04-13 |
| Annual report (amended) | 10-K/A | 2026-02-23 | 2025-12-31 |
| PRE 14A | - | 2026-02-18 | 2026-04-13 |
| Annual report | 10-K | 2026-02-18 | 2025-12-31 |
| Major company event | 8-K | 2026-02-17 | 2026-02-16 |
| Insider trade | 4 | 2026-02-12 | 2026-02-10 |
| Insider trade | 4 | 2026-02-12 | 2026-02-10 |
| Insider trade | 4 | 2026-02-12 | 2026-02-10 |
| Insider trade | 4 | 2026-02-12 | 2026-02-10 |
| Insider trade | 4 | 2026-02-12 | 2026-02-10 |
| Insider trade | 4 | 2026-02-12 | 2026-02-10 |
| Insider trade | 4 | 2026-02-09 | 2026-02-06 |
| Insider trade | 4 | 2026-02-09 | 2026-02-06 |
| Insider trade | 4 | 2026-02-09 | 2026-02-06 |
| Insider trade | 4 | 2026-02-09 | 2026-02-06 |
| Insider trade | 4 | 2026-02-09 | 2026-02-06 |
| Insider trade | 4 | 2026-02-09 | 2026-02-06 |
| New insider ownership | 3 | 2026-01-06 | 2026-01-01 |
| New insider ownership | 3 | 2026-01-06 | 2026-01-01 |
| Major company event | 8-K | 2025-12-18 | 2025-12-16 |
| Quarterly report | 10-Q | 2025-11-05 | 2025-09-30 |
| Major company event | 8-K | 2025-11-04 | 2025-11-03 |
| Quarterly report | 10-Q | 2025-08-06 | 2025-06-30 |
| Major company event | 8-K | 2025-08-05 | 2025-08-04 |