Otter Tail SEC Filings
NASDAQ: OTTRUtilitiesElectric Utilities: CentralUSD
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At close: Oct 9, 4:00 PM ET · Delayed 15 min
Otter Tail filing overview
This page lists 60 recent SEC filings by Otter Tail (OTTR), including 30 4, 18 8-K, 5 10-Q, 3 SCHEDULE 13G. The latest annual report (10-K/A) was filed on Feb 23, 2026 for the period ending Dec 31, 2025. The most recent quarterly report (10-Q) was filed on Aug 5, 2026.
The latest current report (8-K), used to disclose material events such as earnings releases and executive changes, was filed on Sep 1, 2026. Form 10-K is the audited annual report, 10-Q the quarterly report, 8-K covers material events, and Form 4 reports insider transactions. All documents link directly to SEC EDGAR.
Summary generated from market data by MetaCap's automated system. Methodology
OTTR SEC filings
| Filed | Form | Description | Document |
|---|---|---|---|
| Sep 1, 2026 | 8-K | Departure or Appointment of Directors or Officers; Compensatory Arrangements | View on EDGAR |
| Aug 12, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Aug 11, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Aug 7, 2026 | SCHEDULE 13G | Beneficial ownership report (passive) | View on EDGAR |
| Aug 5, 2026 | 10-Q | Quarterly report | View on EDGAR |
| Aug 4, 2026 | 8-K | Results of Operations and Financial Condition | View on EDGAR |
| Jun 18, 2026 | 8-K | Entry into a Material Definitive Agreement | View on EDGAR |
| Jun 5, 2026 | 8-K | Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement | View on EDGAR |
| May 29, 2026 | 8-K | Entry into a Material Definitive Agreement | View on EDGAR |
| May 15, 2026 | 8-K | Other Events | View on EDGAR |
| May 6, 2026 | 10-Q | Quarterly report | View on EDGAR |
| May 5, 2026 | 8-K | Results of Operations and Financial Condition | View on EDGAR |
| Apr 30, 2026 | SCHEDULE 13G | Beneficial ownership report (passive) | View on EDGAR |
| Apr 29, 2026 | SCHEDULE 13G | Beneficial ownership report (passive) | View on EDGAR |
| Apr 15, 2026 | 8-K | Submission of Matters to a Vote of Security Holders | View on EDGAR |
| Apr 15, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Apr 15, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Apr 15, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Apr 15, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Apr 14, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Apr 14, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Apr 14, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Apr 14, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Apr 14, 2026 | 8-K | Departure or Appointment of Directors or Officers; Compensatory Arrangements; Regulation FD Disclosure | View on EDGAR |
| Apr 14, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Apr 14, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Apr 14, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Apr 14, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Apr 14, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Apr 9, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Mar 27, 2026 | SCHEDULE 13G/A | Beneficial ownership report (passive) (amendment) | View on EDGAR |
| Mar 23, 2026 | 8-K | Entry into a Material Definitive Agreement; Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement | View on EDGAR |
| Mar 2, 2026 | DEF 14A | Definitive proxy statement | View on EDGAR |
| Feb 23, 2026 | 10-K/A | Annual report (amendment) | View on EDGAR |
| Feb 18, 2026 | 10-K | Annual report | View on EDGAR |
| Feb 17, 2026 | 8-K | Results of Operations and Financial Condition | View on EDGAR |
| Feb 12, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Feb 12, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Feb 12, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Feb 12, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Feb 12, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Feb 12, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Feb 9, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Feb 9, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Feb 9, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Feb 9, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Feb 9, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Feb 9, 2026 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Dec 18, 2025 | 8-K | Departure or Appointment of Directors or Officers; Compensatory Arrangements; Regulation FD Disclosure | View on EDGAR |
| Nov 5, 2025 | 10-Q | Quarterly report | View on EDGAR |
| Nov 4, 2025 | 8-K | Results of Operations and Financial Condition | View on EDGAR |
| Aug 6, 2025 | 10-Q | Quarterly report | View on EDGAR |
| Aug 5, 2025 | 8-K | Results of Operations and Financial Condition | View on EDGAR |
| Jun 6, 2025 | 8-K | Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement | View on EDGAR |
| Jun 5, 2025 | 8-K | Other Events | View on EDGAR |
| May 7, 2025 | 10-Q | Quarterly report | View on EDGAR |
| May 6, 2025 | 8-K | Results of Operations and Financial Condition | View on EDGAR |
| Apr 17, 2025 | 8-K | Submission of Matters to a Vote of Security Holders | View on EDGAR |
| Apr 14, 2025 | 4 | Statement of changes in beneficial ownership | View on EDGAR |
| Apr 14, 2025 | 4 | Statement of changes in beneficial ownership | View on EDGAR |