Otter Tail Corp SEC filings OTTR
Otter Tail Corp has 878 filings in SEC EDGAR's recent list, going back to Jul 1, 2009. Its latest annual report, Form ARS, was filed on Mar 2, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Nov 4, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Nov 3, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| DEFA14A | Additional proxy material | Mar 2, 2026 | — |
| DEF 14A | Proxy statement | Mar 2, 2026 | Apr 13, 2026 |
| PRE 14A | Preliminary proxy statement | Feb 18, 2026 | Apr 13, 2026 |
| DEF 14A | Proxy statement | Mar 3, 2025 | Dec 31, 2024 |
| DEFA14A | Additional proxy material | Mar 3, 2025 | — |
| DEFA14A | Additional proxy material | Feb 28, 2024 | — |
| DEF 14A | Proxy statement | Feb 28, 2024 | Dec 31, 2023 |
| DEFA14A | Additional proxy material | Mar 7, 2023 | — |
| DEF 14A | Proxy statement | Mar 1, 2023 | — |
| DEF 14A | Proxy statement | Mar 2, 2022 | Dec 31, 2021 |
| DEF 14A | Proxy statement | Mar 3, 2021 | Dec 31, 2020 |
| PRE 14A | Preliminary proxy statement | Feb 17, 2021 | Dec 31, 2020 |
| DEFA14A | Additional proxy material | Mar 20, 2020 | — |
| DEF 14A | Proxy statement | Mar 9, 2020 | Apr 20, 2020 |
| DEF 14A | Proxy statement | Feb 27, 2019 | Apr 8, 2019 |
| DEF 14A | Proxy statement | Feb 28, 2018 | Apr 9, 2018 |
| DEF 14A | Proxy statement | Mar 1, 2017 | Apr 10, 2017 |
| DEF 14A | Proxy statement | Mar 1, 2016 | Apr 11, 2016 |
| DEF 14A | Proxy statement | Mar 3, 2015 | Apr 13, 2015 |
| DEFA14A | Additional proxy material | Mar 31, 2014 | — |
| DEF 14A | Proxy statement | Mar 3, 2014 | Apr 14, 2014 |
| DEF 14A | Proxy statement | Feb 27, 2013 | Apr 8, 2013 |
| DEF 14A | Proxy statement | Mar 7, 2012 | Apr 16, 2012 |
| DEF 14A | Proxy statement | Mar 2, 2011 | Apr 11, 2011 |
| DEF 14A | Proxy statement | Mar 5, 2010 | Apr 12, 2010 |
Showing 25 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Electric Services (SIC 4911)
- Listed as
- OTTR (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- MN
- Headquarters
- Fergus Falls, MN
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1466593
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.