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Otter Tail Corp — SCHEDULE 13G/A Filings

1 SCHEDULE 13G/A filing on record

This page lists all SCHEDULE 13G/A 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 1 SCHEDULE 13G/A document 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
SCHEDULE 13G/A — 0000102909-26-001980 Mar 27, 2026 —