EdgarLookup

Otter Tail Corp — 10-K Filings

17 10-K filings on record

This page lists all 10-K filings submitted to the SEC by Otter Tail Corp (OTTR), sorted by most recent first. Each row links to the full filing on EdgarLookup. Otter Tail Corp has filed 17 10-K documents with the SEC since 2009. To view all SEC filings by Otter Tail Corp, see the full filings list.

Overview All Filings Financials Insiders
All 10-K 10-K/A 10-Q 10-Q/A 144 15-12G 3 3/A 4 4/A 424B2 424B5 5 8-K 8-K/A 8-K12G3 ARS CORRESP CT ORDER DEF 14A DEFA14A DEFR14A FWP POSASR PRE 14A S-3ASR S-8 S-8 POS SC 13D/A SC 13G SC 13G/A SCHEDULE 13G/A SD UPLOAD
Form Description Accession Number Filed Period
10-K 10-K 0001466593-26-000008 Feb 18, 2026 Dec 31, 2025
10-K 10-K 0001466593-25-000034 Feb 19, 2025 Dec 31, 2024
10-K 10-K 0001466593-24-000039 Feb 14, 2024 Dec 31, 2023
10-K 10-K 0001466593-23-000053 Feb 15, 2023 Dec 31, 2022
10-K 10-K 0001466593-22-000010 Feb 16, 2022 Dec 31, 2021
10-K 10-K 0001466593-21-000011 Feb 19, 2021 Dec 31, 2020
10-K FORM 10-K 0001437749-20-003157 Feb 20, 2020 Dec 31, 2019
10-K FORM 10-K 0001437749-19-003150 Feb 22, 2019 Dec 31, 2018
10-K FORM 10-K 0001437749-18-002843 Feb 20, 2018 Dec 31, 2017
10-K FORM 10-K 0001571049-17-001533 Feb 22, 2017 Dec 31, 2016
10-K FORM 10-K 0001571049-16-012346 Feb 29, 2016 Dec 31, 2015
10-K FORM 10-K 0001571049-15-001534 Mar 2, 2015 Dec 31, 2014
10-K FORM 10-K 0001188112-14-000558 Mar 3, 2014 Dec 31, 2013
10-K FORM 10-K 0001188112-13-000505 Feb 27, 2013 Dec 31, 2012
10-K OTTER TAIL CORPORATION 10-K 0001157523-12-001147 Feb 29, 2012 Dec 31, 2011
10-K OTTER TAIL CORP. 10-K 0001157523-11-001197 Feb 28, 2011 Dec 31, 2010
10-K FORM 10-K 0000950123-10-018165 Feb 26, 2010 Dec 31, 2009