Otter Tail Corp (OTTR) Form 10-K Annual Reports
Otter Tail Corp (OTTR) is a publicly traded company on the Nasdaq, categorized under SIC 4911 (Electric Services). Access real-time SEC filings, 10-K annual reports, 10-Q quarterlies, 8-K current reports, PCAOB auditor history, and executive compensation disclosures.
Ticker: OTTR
CIK: 1466593
Exchange: Nasdaq
SIC 4911: Electric Services
Fiscal Year End: 12/31
State: MN
Independent PCAOB Auditor
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Audit Firm
Deloitte & Touche LLP
Auditor SinceSince 12/31/2016 12:00:00 AM
Lead Engagement PartnerAmanda Guanzini
Audit LocationMinneapolis, Minnesota, United States
Latest SEC EDGAR Filings
Showing 10-K, 10-Q, 8-K, Form 4, and other SEC submissions| Form | Filing Date | Reporting Period | Description | Accession Number | Actions |
|---|---|---|---|---|---|
| 8-K | 2026-09-01 | 2026-08-28 | 8-K | 0001466593-26-000074 | View SEC Doc Filr Page |
| 4 | 2026-08-12 | 2026-08-10 | FORM 4 | 0001559334-26-000010 | View SEC Doc Filr Page |
| 4 | 2026-08-11 | 2026-08-07 | FORM 4 | 0001559334-26-000006 | View SEC Doc Filr Page |
| 144 | 2026-08-07 | — | 144 Filing | 0001958244-26-000494 | View SEC Doc Filr Page |
| SCHEDULE 13G | 2026-08-07 | — | SCHEDULE 13G Filing | 0000093751-26-000516 | View SEC Doc Filr Page |
| 10-Q | 2026-08-05 | 2026-06-30 | 10-Q | 0001466593-26-000071 | View SEC Doc Filr Page |
| 8-K | 2026-08-04 | 2026-08-03 | 8-K | 0001466593-26-000068 | View SEC Doc Filr Page |
| 8-K | 2026-06-18 | 2026-06-17 | 8-K | 0001466593-26-000063 | View SEC Doc Filr Page |
| 8-K | 2026-06-05 | 2026-06-04 | 8-K | 0001466593-26-000061 | View SEC Doc Filr Page |
| SD | 2026-05-29 | — | SD | 0001466593-26-000059 | View SEC Doc Filr Page |
| 8-K | 2026-05-29 | 2026-05-28 | 8-K | 0001466593-26-000057 | View SEC Doc Filr Page |
| 8-K | 2026-05-15 | 2026-05-15 | 8-K | 0001466593-26-000054 | View SEC Doc Filr Page |
| 10-Q | 2026-05-06 | 2026-03-31 | 10-Q | 0001466593-26-000051 | View SEC Doc Filr Page |
| 8-K | 2026-05-05 | 2026-05-04 | 8-K | 0001466593-26-000049 | View SEC Doc Filr Page |
| SCHEDULE 13G | 2026-04-30 | — | SCHEDULE 13G Filing | 0002100119-26-000905 | View SEC Doc Filr Page |
| SCHEDULE 13G | 2026-04-29 | — | SCHEDULE 13G Filing | 0002100121-26-000602 | View SEC Doc Filr Page |
| 4 | 2026-04-15 | 2026-04-13 | FORM 4 | 0002002077-26-000009 | View SEC Doc Filr Page |
| 4 | 2026-04-15 | 2026-04-13 | FORM 4 | 0001605621-26-000007 | View SEC Doc Filr Page |
| 4 | 2026-04-15 | 2026-04-13 | FORM 4 | 0001726153-26-000007 | View SEC Doc Filr Page |
| 4 | 2026-04-15 | 2026-04-13 | FORM 4 | 0002129002-26-000004 | View SEC Doc Filr Page |
| 8-K | 2026-04-15 | 2026-04-13 | 8-K | 0001466593-26-000040 | View SEC Doc Filr Page |
| 3 | 2026-04-14 | 2026-04-13 | FORM 3 | 0002129002-26-000003 | View SEC Doc Filr Page |
| 4 | 2026-04-14 | 2026-04-13 | FORM 4 | 0001574100-26-000002 | View SEC Doc Filr Page |
| 4 | 2026-04-14 | 2026-04-13 | FORM 4 | 0001959466-26-000002 | View SEC Doc Filr Page |
| 8-K | 2026-04-14 | 2026-04-13 | 8-K | 0001466593-26-000037 | View SEC Doc Filr Page |