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Year archive

Otter Tail Corp — 2026 filings

All 26 regulatory filings released by Otter Tail Corp (OTTR) in 2026, sourced directly from the official regulator.

26 Filings
2026 Period
2026 filings (26)
Filing Released Lang
8-K
Regulatory Filings
2026-05-15 English
10-Q - Otter Tail Corp (0001466593) (Filer)
Interim / Quarterly Report
2026-05-06 English
8-K - Otter Tail Corp (0001466593) (Filer)
Regulatory Filings
2026-05-05 English
8-K - Otter Tail Corp (0001466593) (Filer)
Regulatory Filings
2026-04-15 English
8-K - Otter Tail Corp (0001466593) (Filer)
Regulatory Filings
2026-04-14 English
SCHEDULE 13G/A - Otter Tail Corp (0001466593) (Subject)
Major Shareholding Notification
2026-03-27 English
8-K - Otter Tail Corp (0001466593) (Filer)
Regulatory Filings
2026-03-23 English
ARS - OTTER TAIL CORP (0001466593) (Filer)
Annual Report FY 2025
2026-03-02 English
DEF 14A - OTTER TAIL CORP (0001466593) (Filer)
Proxy Solicitation & Information Statement
2026-03-02 English
10-K/A - OTTER TAIL CORP (0001466593) (Filer)
Annual Report FY 2025
2026-02-23 English
10-K - OTTER TAIL CORP (0001466593) (Filer)
Annual Report FY 2025
2026-02-18 English
8-K Filing
Regulatory Filings
2026-02-17 English
4 Filing
Director's Dealing
2026-02-12 English
4 Filing
Director's Dealing
2026-02-12 English
4 Filing
Director's Dealing
2026-02-12 English
4 Filing
Director's Dealing
2026-02-12 English
4 Filing
Director's Dealing
2026-02-12 English
4 Filing
Director's Dealing
2026-02-12 English
4 - Otter Tail Corp (0001466593) (Issuer)
Director's Dealing
2026-02-09 English
4 - Otter Tail Corp (0001466593) (Issuer)
Director's Dealing
2026-02-09 English
4 - Otter Tail Corp (0001466593) (Issuer)
Director's Dealing
2026-02-09 English
4 - OTTER TAIL CORP (0001466593) (Filer)
Director's Dealing
2026-02-09 English
4 - Otter Tail Corp (0001466593) (Issuer)
Director's Dealing
2026-02-09 English
4 Filing
Director's Dealing
2026-02-09 English
FORM 3
Director's Dealing
2026-01-06 English
FORM 3
Director's Dealing
2026-01-06 English