Otter Tail Corp SEC EDGAR Filings (CIK 0001466593)

SEC EDGAR filings, ownership reports, and insider transactions for Otter Tail Corp.

Symbol
OTTR on Nasdaq
Industry
Electric Services (Office Of Energy & Transportation)
Business address
215 S Cascade St, Po Box 496, Fergus Falls, MN, 56538-0496
State of incorporation
MN
Fiscal year end
31 December
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Otter Tail Corp has filed 822 SEC EDGAR filings since 01 Jul 2009

Latest Filings

Recent SEC filings for Otter Tail Corp including 3, 8-K, 10-Q and more.

Form type Document Filing Description Filing date Reporting date File number(s)
3 Open 3 document View SEC filing for 3 FORM 3 06 Jan 2026 01 Jan 2026
3 Open 3 document View SEC filing for 3 FORM 3 06 Jan 2026 01 Jan 2026
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 18 Dec 2025 16 Dec 2025 000-53713
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 05 Nov 2025 30 Sep 2025 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 04 Nov 2025 03 Nov 2025 000-53713
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 06 Aug 2025 30 Jun 2025 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 05 Aug 2025 04 Aug 2025 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 06 Jun 2025 05 Jun 2025 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 05 Jun 2025 04 Jun 2025 000-53713
SD Open SD document View SEC filing for SD SD 30 May 2025 000-53713
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 07 May 2025 31 Mar 2025 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 06 May 2025 05 May 2025 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 17 Apr 2025 14 Apr 2025 000-53713
4 Open 4 document View SEC filing for 4 FORM 4 14 Apr 2025 13 Apr 2025
4 Open 4 document View SEC filing for 4 FORM 4 14 Apr 2025 13 Apr 2025
4 Open 4 document View SEC filing for 4 FORM 4 14 Apr 2025 13 Apr 2025
4 Open 4 document View SEC filing for 4 FORM 4 14 Apr 2025 13 Apr 2025
4 Open 4 document View SEC filing for 4 FORM 4 14 Apr 2025 13 Apr 2025
4 Open 4 document View SEC filing for 4 FORM 4 14 Apr 2025 13 Apr 2025
4 Open 4 document View SEC filing for 4 FORM 4 14 Apr 2025 13 Apr 2025
4 Open 4 document View SEC filing for 4 FORM 4 14 Apr 2025 13 Apr 2025
4 Open 4 document View SEC filing for 4 FORM 4 09 Apr 2025 08 Apr 2025
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 31 Mar 2025 27 Mar 2025 000-53713
ARS Open ARS document View SEC filing for ARS ARS 03 Mar 2025 31 Dec 2024 000-53713
DEF 14A Open DEF 14A document | Open XBRL data View SEC filing for DEF 14A DEF 14A 03 Mar 2025 31 Dec 2024 000-53713
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 03 Mar 2025 000-53713
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 19 Feb 2025 31 Dec 2024 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 18 Feb 2025 17 Feb 2025 000-53713
4 Open 4 document View SEC filing for 4 FORM 4 13 Feb 2025 11 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 13 Feb 2025 11 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 13 Feb 2025 11 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 13 Feb 2025 11 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 13 Feb 2025 11 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 13 Feb 2025 11 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 07 Feb 2025 06 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 07 Feb 2025 06 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 07 Feb 2025 06 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 07 Feb 2025 06 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 07 Feb 2025 06 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 07 Feb 2025 06 Feb 2025
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 31 Dec 2024 30 Dec 2024 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 16 Dec 2024 11 Dec 2024 000-53713
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 07 Nov 2024 30 Sep 2024 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 05 Nov 2024 04 Nov 2024 000-53713
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A SC 13D/A 03 Oct 2024 005-84909
4 Open 4 document View SEC filing for 4 FORM 4 14 Aug 2024 13 Aug 2024
144 Open 144 document View SEC filing for 144 13 Aug 2024 000-53713
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 07 Aug 2024 30 Jun 2024 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 06 Aug 2024 05 Aug 2024 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 05 Jun 2024 30 May 2024 000-53713
4 Open 4 document View SEC filing for 4 FORM 4 28 May 2024 24 May 2024
SD Open SD document View SEC filing for SD SD 24 May 2024 000-53713
144 Open 144 document View SEC filing for 144 24 May 2024 000-53713
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 08 May 2024 31 Mar 2024 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 07 May 2024 06 May 2024 000-53713
S-3ASR Open S-3ASR document View SEC filing for S-3ASR S-3ASR 03 May 2024 333-279100
S-3ASR Open S-3ASR document View SEC filing for S-3ASR S-3ASR 03 May 2024 333-279099
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 10 Apr 2024 08 Apr 2024 000-53713
4 Open 4 document View SEC filing for 4 FORM 4 09 Apr 2024 08 Apr 2024
4 Open 4 document View SEC filing for 4 FORM 4 09 Apr 2024 08 Apr 2024
4 Open 4 document View SEC filing for 4 FORM 4 09 Apr 2024 08 Apr 2024
4 Open 4 document View SEC filing for 4 FORM 4 09 Apr 2024 08 Apr 2024
4 Open 4 document View SEC filing for 4 FORM 4 09 Apr 2024 08 Apr 2024
4 Open 4 document View SEC filing for 4 FORM 4 09 Apr 2024 08 Apr 2024
4 Open 4 document View SEC filing for 4 FORM 4 09 Apr 2024 08 Apr 2024
4 Open 4 document View SEC filing for 4 FORM 4 09 Apr 2024 08 Apr 2024
4 Open 4 document View SEC filing for 4 FORM 4 09 Apr 2024 08 Apr 2024
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 05 Apr 2024 02 Apr 2024 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 02 Apr 2024 28 Mar 2024 000-53713
4 Open 4 document View SEC filing for 4 FORM 4 13 Mar 2024 12 Mar 2024
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 28 Feb 2024 000-53713
DEF 14A Open DEF 14A document | Open XBRL data View SEC filing for DEF 14A DEF 14A 28 Feb 2024 31 Dec 2023 000-53713
ARS Open ARS document View SEC filing for ARS ARS 28 Feb 2024 31 Dec 2023 000-53713
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 14 Feb 2024 31 Dec 2023 000-53713
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SCHEDULE 13G/A 13 Feb 2024 005-84909
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 13 Feb 2024 12 Feb 2024 000-53713
4 Open 4 document View SEC filing for 4 FORM 4 08 Feb 2024 06 Feb 2024
4 Open 4 document View SEC filing for 4 FORM 4 08 Feb 2024 06 Feb 2024
4 Open 4 document View SEC filing for 4 FORM 4 08 Feb 2024 06 Feb 2024
4 Open 4 document View SEC filing for 4 FORM 4 08 Feb 2024 06 Feb 2024
4 Open 4 document View SEC filing for 4 FORM 4 08 Feb 2024 06 Feb 2024
4 Open 4 document View SEC filing for 4 FORM 4 08 Feb 2024 06 Feb 2024
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 29 Jan 2024 26 Jan 2024 000-53713
5 Open 5 document View SEC filing for 5 FORM 5 23 Jan 2024 31 Dec 2023
5 Open 5 document View SEC filing for 5 FORM 5 23 Jan 2024 31 Dec 2023
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 22 Jan 2024 005-84909
3 Open 3 document View SEC filing for 3 FORM 3 08 Jan 2024 01 Jan 2024
4 Open 4 document View SEC filing for 4 FORM 4 02 Jan 2024 31 Dec 2023
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 21 Dec 2023 15 Dec 2023 000-53713
4 Open 4 document View SEC filing for 4 FORM 4 20 Nov 2023 20 Nov 2023
144 Open 144 document View SEC filing for 144 20 Nov 2023 000-53713
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 03 Nov 2023 30 Sep 2023 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 31 Oct 2023 30 Oct 2023 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 04 Oct 2023 02 Oct 2023 000-53713
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 02 Aug 2023 30 Jun 2023 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 01 Aug 2023 31 Jul 2023 000-53713
8-K/A Open 8-K/A document | Open XBRL data View SEC filing for 8-K/A 8-K/A 20 Jun 2023 16 Apr 2023 000-53713
SD Open SD document View SEC filing for SD SD 25 May 2023 000-53713
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 03 May 2023 31 Mar 2023 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 02 May 2023 01 May 2023 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 19 Apr 2023 16 Apr 2023 000-53713
4 Open 4 document View SEC filing for 4 FORM 4 19 Apr 2023 17 Apr 2023
4 Open 4 document View SEC filing for 4 FORM 4 19 Apr 2023 17 Apr 2023
4 Open 4 document View SEC filing for 4 FORM 4 19 Apr 2023 17 Apr 2023
4 Open 4 document View SEC filing for 4 FORM 4 19 Apr 2023 17 Apr 2023
4 Open 4 document View SEC filing for 4 FORM 4 19 Apr 2023 17 Apr 2023
4 Open 4 document View SEC filing for 4 FORM 4 19 Apr 2023 17 Apr 2023
4 Open 4 document View SEC filing for 4 FORM 4 19 Apr 2023 17 Apr 2023
4 Open 4 document View SEC filing for 4 FORM 4 19 Apr 2023 17 Apr 2023
4 Open 4 document View SEC filing for 4 FORM 4 19 Apr 2023 17 Apr 2023
S-8 Open S-8 document View SEC filing for S-8 S-8 17 Apr 2023 333-271284
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 31 Mar 2023 31 Mar 2023 000-53713
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 08 Mar 2023 005-84909
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 07 Mar 2023 000-53713
DEFR14A Open DEFR14A document View SEC filing for DEFR14A DEFR14A 07 Mar 2023 000-53713
DEF 14A Open DEF 14A document | Open XBRL data View SEC filing for DEF 14A DEF 14A 01 Mar 2023 000-53713
ARS Open ARS document View SEC filing for ARS ARS 01 Mar 2023 31 Dec 2022 000-53713
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 15 Feb 2023 31 Dec 2022 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 14 Feb 2023 13 Feb 2023 000-53713
4 Open 4 document View SEC filing for 4 FORM 4 09 Feb 2023 07 Feb 2023
4 Open 4 document View SEC filing for 4 FORM 4 09 Feb 2023 07 Feb 2023
4 Open 4 document View SEC filing for 4 FORM 4 09 Feb 2023 07 Feb 2023
4 Open 4 document View SEC filing for 4 FORM 4 09 Feb 2023 07 Feb 2023
4 Open 4 document View SEC filing for 4 FORM 4 09 Feb 2023 07 Feb 2023
4 Open 4 document View SEC filing for 4 FORM 4 09 Feb 2023 07 Feb 2023
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SCHEDULE 13G/A 09 Feb 2023 005-84909
4 Open 4 document View SEC filing for 4 FORM 4 08 Feb 2023 06 Feb 2023
4 Open 4 document View SEC filing for 4 FORM 4 08 Feb 2023 06 Feb 2023
4 Open 4 document View SEC filing for 4 FORM 4 08 Feb 2023 06 Feb 2023
4 Open 4 document View SEC filing for 4 FORM 4 08 Feb 2023 06 Feb 2023
4 Open 4 document View SEC filing for 4 FORM 4 08 Feb 2023 06 Feb 2023
4 Open 4 document View SEC filing for 4 FORM 4 08 Feb 2023 06 Feb 2023
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 31 Jan 2023 005-84909
5 Open 5 document View SEC filing for 5 FORM 5 24 Jan 2023 31 Dec 2022
3 Open 3 document View SEC filing for 3 FORM 3 10 Jan 2023 01 Jan 2023
3 Open 3 document View SEC filing for 3 FORM 3 10 Jan 2023 01 Jan 2023
4 Open 4 document View SEC filing for 4 FORM 4 03 Jan 2023 31 Dec 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 22 Dec 2022 21 Dec 2022 000-53713
4 Open 4 document View SEC filing for 4 FORM 4 22 Nov 2022 21 Nov 2022
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 02 Nov 2022 30 Sep 2022 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 01 Nov 2022 31 Oct 2022 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 19 Oct 2022 14 Oct 2022 000-53713
4 Open 4 document View SEC filing for 4 FORM 4 03 Oct 2022 30 Sep 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 23 Sep 2022 21 Sep 2022 000-53713
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 03 Aug 2022 30 Jun 2022 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 02 Aug 2022 01 Aug 2022 000-53713
4 Open 4 document View SEC filing for 4 FORM 4 01 Jul 2022 30 Jun 2022
4 Open 4 document View SEC filing for 4 FORM 4 01 Jul 2022 30 Jun 2022
SD Open SD document View SEC filing for SD SD 27 May 2022 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 23 May 2022 20 May 2022 000-53713
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 04 May 2022 31 Mar 2022 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 03 May 2022 02 May 2022 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 14 Apr 2022 11 Apr 2022 000-53713
4 Open 4 document View SEC filing for 4 PARTAIN4112022 13 Apr 2022 11 Apr 2022
4 Open 4 document View SEC filing for 4 JOHNSON04112022 12 Apr 2022 11 Apr 2022
4 Open 4 document View SEC filing for 4 WEBB04112022 12 Apr 2022 11 Apr 2022
4 Open 4 document View SEC filing for 4 STAKE04112022 12 Apr 2022 11 Apr 2022
4 Open 4 document View SEC filing for 4 FRITZE04112022 12 Apr 2022 11 Apr 2022
4 Open 4 document View SEC filing for 4 FORM 4 12 Apr 2022 11 Apr 2022
4 Open 4 document View SEC filing for 4 FORM 4 12 Apr 2022 11 Apr 2022
4 Open 4 document View SEC filing for 4 BOHN04112022 12 Apr 2022 11 Apr 2022
4 Open 4 document View SEC filing for 4 LEBEAU3312022 01 Apr 2022 31 Mar 2022
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 02 Mar 2022 31 Dec 2021 000-53713
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 16 Feb 2022 31 Dec 2021 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 15 Feb 2022 14 Feb 2022 000-53713
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SCHEDULE 13G/A 09 Feb 2022 005-84909
4 Open 4 document View SEC filing for 4 MACFARLANE2072022 09 Feb 2022 07 Feb 2022
4 Open 4 document View SEC filing for 4 MOUG2/7/2022 09 Feb 2022 07 Feb 2022
4 Open 4 document View SEC filing for 4 SMESTAD2/7/2022 09 Feb 2022 07 Feb 2022
4 Open 4 document View SEC filing for 4 KNUTSON2072027 08 Feb 2022 07 Feb 2022
4 Open 4 document View SEC filing for 4 ROGELSTAD2072022 08 Feb 2022 07 Feb 2022
4 Open 4 document View SEC filing for 4 ABBOTT2072022 08 Feb 2022 07 Feb 2022
4 Open 4 document View SEC filing for 4 KNUTSON2062022 08 Feb 2022 06 Feb 2022
4 Open 4 document View SEC filing for 4 ABBOTT2062022 08 Feb 2022 06 Feb 2022
4 Open 4 document View SEC filing for 4 ROGELSTAD02062022 08 Feb 2022 06 Feb 2022
4 Open 4 document View SEC filing for 4 MACFARLANE2062022 07 Feb 2022 06 Feb 2022
4 Open 4 document View SEC filing for 4 SMESTAD2062022 07 Feb 2022 06 Feb 2022
4 Open 4 document View SEC filing for 4 MOUG20622 07 Feb 2022 06 Feb 2022
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 03 Feb 2022 005-84909
5 Open 5 document View SEC filing for 5 PARTAIN01242022 24 Jan 2022 31 Dec 2021
5 Open 5 document View SEC filing for 5 MACFARLANE01242022 24 Jan 2022 31 Dec 2021
3 Open 3 document View SEC filing for 3 LEBEAU01012022 04 Jan 2022 01 Jan 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 15 Dec 2021 14 Dec 2021 000-53713
4 Open 4 document View SEC filing for 4 O'KEEFE12072021 07 Dec 2021 06 Dec 2021
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 01 Dec 2021 29 Nov 2021 000-53713
4 Open 4 document View SEC filing for 4 ERICKSON11172021 18 Nov 2021 17 Nov 2021
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 03 Nov 2021 30 Sep 2021 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 02 Nov 2021 01 Nov 2021 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 04 Oct 2021 30 Sep 2021 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 02 Sep 2021 01 Sep 2021 000-53713
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 06 Aug 2021 30 Jun 2021 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 03 Aug 2021 02 Aug 2021 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 14 Jun 2021 10 Jun 2021 000-53713
SD Open SD document View SEC filing for SD SD 28 May 2021 000-53713
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SCHEDULE 13G/A 10 May 2021 005-84909
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 07 May 2021 31 Mar 2021 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 04 May 2021 03 May 2021 000-53713
S-3ASR Open S-3ASR document View SEC filing for S-3ASR S-3ASR 03 May 2021 333-255717
S-3ASR Open S-3ASR document View SEC filing for S-3ASR S-3 03 May 2021 333-255714
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 14 Apr 2021 12 Apr 2021 000-53713
4 Open 4 document View SEC filing for 4 WEBB04122021 13 Apr 2021 12 Apr 2021
4 Open 4 document View SEC filing for 4 STAKE04122021 13 Apr 2021 12 Apr 2021
4 Open 4 document View SEC filing for 4 PARTAIN04122021 13 Apr 2021 12 Apr 2021
4 Open 4 document View SEC filing for 4 O'KEEFE04122021 13 Apr 2021 12 Apr 2021
4 Open 4 document View SEC filing for 4 JOHNSON04122021 13 Apr 2021 12 Apr 2021
4 Open 4 document View SEC filing for 4 FRITZE04122021 13 Apr 2021 12 Apr 2021
4 Open 4 document View SEC filing for 4 ERICKSON04122021 13 Apr 2021 12 Apr 2021
4 Open 4 document View SEC filing for 4 BOHN4122021 13 Apr 2021 12 Apr 2021
4 Open 4 document View SEC filing for 4 SMESTAD04082021 09 Apr 2021 08 Apr 2021
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 03 Mar 2021 31 Dec 2020 000-53713
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 19 Feb 2021 31 Dec 2020 000-53713
PRE 14A Open PRE 14A document View SEC filing for PRE 14A PRE 14A 17 Feb 2021 31 Dec 2020 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 16 Feb 2021 15 Feb 2021 000-53713
4 Open 4 document View SEC filing for 4 ROGELSTAD02102021 12 Feb 2021 10 Feb 2021
4 Open 4 document View SEC filing for 4 ABBOTT02102021 12 Feb 2021 10 Feb 2021
4 Open 4 document View SEC filing for 4 KNUTSON20102021 12 Feb 2021 10 Feb 2021
4 Open 4 document View SEC filing for 4 SMESTAD02102021 12 Feb 2021 10 Feb 2021
4 Open 4 document View SEC filing for 4 MOUG02102021 12 Feb 2021 10 Feb 2021
4 Open 4 document View SEC filing for 4 MACFARLANE21021 12 Feb 2021 10 Feb 2021
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SCHEDULE 13G/A 10 Feb 2021 005-84909
4 Open 4 document View SEC filing for 4 SMESTAD020621 09 Feb 2021 06 Feb 2021
4 Open 4 document View SEC filing for 4 ROGELSTAD020621 09 Feb 2021 06 Feb 2021
4 Open 4 document View SEC filing for 4 ABBOTT020621 09 Feb 2021 06 Feb 2021
4 Open 4 document View SEC filing for 4 KNUTSON020621 09 Feb 2021 06 Feb 2021
4 Open 4 document View SEC filing for 4 MOUG020621 09 Feb 2021 06 Feb 2021
4 Open 4 document View SEC filing for 4 MACFARLANE020621 09 Feb 2021 06 Feb 2021
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 29 Jan 2021 005-84909
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 06 Nov 2020 30 Sep 2020 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 03 Nov 2020 02 Nov 2020 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 02 Nov 2020 02 Nov 2020 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 20 Aug 2020 20 Aug 2020 000-53713
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 07 Aug 2020 30 Jun 2020 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 04 Aug 2020 03 Aug 2020 000-53713
SD Open SD document View SEC filing for SD FORM SD 29 May 2020 000-53713
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 08 May 2020 31 Mar 2020 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 06 May 2020 05 May 2020 000-53713
4 Open 4 document View SEC filing for 4 042020ERICKSON 22 Apr 2020 20 Apr 2020
4 Open 4 document View SEC filing for 4 042020FRITZE 22 Apr 2020 20 Apr 2020
4 Open 4 document View SEC filing for 4 42020BOHN 22 Apr 2020 20 Apr 2020
4 Open 4 document View SEC filing for 4 042020WEBB 22 Apr 2020 20 Apr 2020
4 Open 4 document View SEC filing for 4 042020STAKE 22 Apr 2020 20 Apr 2020
4 Open 4 document View SEC filing for 4 042020PARTAIN 22 Apr 2020 20 Apr 2020
4 Open 4 document View SEC filing for 4 042020O'KEEFE 22 Apr 2020 20 Apr 2020
4 Open 4 document View SEC filing for 4 042020JOHNSON 22 Apr 2020 20 Apr 2020
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 22 Apr 2020 20 Apr 2020 000-53713
4 Open 4 document View SEC filing for 4 040820SMESTAD 10 Apr 2020 08 Apr 2020
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 20 Mar 2020 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 20 Mar 2020 20 Mar 2020 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 17 Mar 2020 17 Mar 2020 000-53713
4 Open 4 document View SEC filing for 4 03122020ABBOTT 16 Mar 2020 12 Mar 2020
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 09 Mar 2020 20 Apr 2020 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 26 Feb 2020 25 Feb 2020 000-53713
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A SC 13D/A 24 Feb 2020 005-84909
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K FORM 10-K 20 Feb 2020 31 Dec 2019 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 18 Feb 2020 17 Feb 2020 000-53713
4 Open 4 document View SEC filing for 4 SMESTAD021220 14 Feb 2020 12 Feb 2020
4 Open 4 document View SEC filing for 4 ROGELSTAD021220 14 Feb 2020 12 Feb 2020
4 Open 4 document View SEC filing for 4 ABBOTT021220 14 Feb 2020 12 Feb 2020
4 Open 4 document View SEC filing for 4 KNUTSON021220 14 Feb 2020 12 Feb 2020
4 Open 4 document View SEC filing for 4 MOUG021220 14 Feb 2020 12 Feb 2020
4 Open 4 document View SEC filing for 4 MACFARLANE021220 14 Feb 2020 12 Feb 2020
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SCHEDULE 13G/A 12 Feb 2020 005-84909
4 Open 4 document View SEC filing for 4 KNUTSON020620 10 Feb 2020 06 Feb 2020
4 Open 4 document View SEC filing for 4 MACFARLANE020620 10 Feb 2020 06 Feb 2020
4 Open 4 document View SEC filing for 4 020620SMESTAD 10 Feb 2020 06 Feb 2020
4 Open 4 document View SEC filing for 4 020620ABBOTT 10 Feb 2020 06 Feb 2020
4 Open 4 document View SEC filing for 4 020620ROGELSTAD 10 Feb 2020 06 Feb 2020
4 Open 4 document View SEC filing for 4 02/06/20MOUG 10 Feb 2020 06 Feb 2020
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 05 Feb 2020 005-84909
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 27 Dec 2019 26 Dec 2019 000-53713
4 Open 4 document View SEC filing for 4 ERICKSON112019 21 Nov 2019 20 Nov 2019
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 08 Nov 2019 08 Nov 2019 000-53713
424B5 Open 424B5 document View SEC filing for 424B5 424B5 08 Nov 2019 333-224649
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 08 Nov 2019 30 Sep 2019 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 05 Nov 2019 31 Oct 2019 000-53713
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 11 Oct 2019 10 Oct 2019 000-53713
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10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 12 Nov 2013 30 Sep 2013 000-53713
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8-K Open 8-K document View SEC filing for 8-K OTTER TAIL CORPORATION 8-K 10 Apr 2013 08 Apr 2013 000-53713
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CT ORDER Open CT ORDER document View SEC filing for CT ORDER 22 Mar 2013 000-53713
ARS Open ARS document View SEC filing for ARS AUTO-GENERATED PAPER DOCUMENT 15 Mar 2013 31 Dec 2012 000-53713
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10-K Open 10-K document | Open XBRL data View SEC filing for 10-K FORM 10-K 27 Feb 2013 31 Dec 2012 000-53713
DEF 14A Open DEF 14A document View SEC filing for DEF 14A PROXY STATEMENT 27 Feb 2013 08 Apr 2013 000-53713
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UPLOAD Open UPLOAD document View SEC filing for UPLOAD 28 Jan 2013
CORRESP Open CORRESP document View SEC filing for CORRESP 23 Jan 2013
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10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 09 Nov 2012 30 Sep 2012 000-53713
8-K Open 8-K document View SEC filing for 8-K OTTER TAIL CORPORATION 8-K 06 Nov 2012 05 Nov 2012 000-53713
8-K Open 8-K document View SEC filing for 8-K OTTER TAIL CORPORATION 8-K 02 Nov 2012 29 Oct 2012 000-53713
8-K Open 8-K document View SEC filing for 8-K OTTER TAIL CORPORATION 8-K 15 Oct 2012 10 Oct 2012 000-53713
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 03 Oct 2012 01 Oct 2012
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 01 Oct 2012 28 Sep 2012
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10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 09 Aug 2012 30 Jun 2012 000-53713
8-K Open 8-K document View SEC filing for 8-K OTTER TAIL CORPORATION 8-K 07 Aug 2012 06 Aug 2012 000-53713
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A SC 13D/A 16 Jul 2012 005-84909
8-K Open 8-K document View SEC filing for 8-K OTTER TAIL CORPORATION 8-K 16 Jul 2012 13 Jul 2012 000-53713
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Jul 2012 29 Jun 2012
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Jul 2012 29 Jun 2012
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 11 Jun 2012 07 Jun 2012
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 17 May 2012 16 May 2012
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8-K Open 8-K document View SEC filing for 8-K FORM 8-K 14 May 2012 14 May 2012 000-53713
424B5 Open 424B5 document View SEC filing for 424B5 PROSPECTUS SUPPLEMENT 14 May 2012 333-181357
S-8 Open S-8 document View SEC filing for S-8 FORM S-8 11 May 2012 333-181362
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10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q OTTER TAIL CORPORATION 10-Q 10 May 2012 31 Mar 2012 000-53713
8-K Open 8-K document View SEC filing for 8-K OTTER TAIL CORP. 8-K 08 May 2012 07 May 2012 000-53713
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4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 17 Apr 2012 16 Apr 2012
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 17 Apr 2012 16 Apr 2012
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 17 Apr 2012 16 Apr 2012
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 10 Apr 2012 08 Apr 2012
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4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 10 Apr 2012 08 Apr 2012
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4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 27 Mar 2012 26 Mar 2012
8-K Open 8-K document View SEC filing for 8-K OTTER TAIL CORPORATION 8K 20 Mar 2012 14 Mar 2012 000-53713
ARS Open ARS document View SEC filing for ARS AUTO-GENERATED PAPER DOCUMENT 19 Mar 2012 31 Dec 2011 000-53713
DEF 14A Open DEF 14A document View SEC filing for DEF 14A NOA & PROXY STATEMENT 07 Mar 2012 16 Apr 2012 000-53713
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K OTTER TAIL CORPORATION 10-K 29 Feb 2012 31 Dec 2011 000-53713
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8-K Open 8-K document View SEC filing for 8-K OTTER TAIL CORP. 8-K 07 Feb 2012 06 Feb 2012 000-53713
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 09 Jan 2012 06 Jan 2012 000-53713
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A SC 13D/A 09 Jan 2012 005-84909
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 06 Jan 2012 03 Jan 2012 000-53713
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3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 03 Jan 2012 16 Dec 2011
8-K Open 8-K document View SEC filing for 8-K OTTER TAIL CORPORATION 8-K 30 Dec 2011 29 Dec 2011 000-53713
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 27 Dec 2011 22 Dec 2011
8-K Open 8-K document View SEC filing for 8-K OTTER TAIL CORPORATION 8-K 20 Dec 2011 16 Dec 2011 000-53713
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 19 Dec 2011 15 Dec 2011
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A SC 13D/A 13 Dec 2011 005-84909
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 13 Dec 2011 12 Dec 2011 000-53713
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 06 Dec 2011 01 Dec 2011 000-53713
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 14 Nov 2011 10 Nov 2011
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q OTTER TAIL CORPORATION 10-Q 09 Nov 2011 30 Sep 2011 000-53713
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A SC 13D/A 04 Nov 2011 005-84909
8-K Open 8-K document View SEC filing for 8-K OTTER TAIL CORP. 8-K 04 Nov 2011 03 Nov 2011 000-53713
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 04 Oct 2011 30 Sep 2011
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8-K Open 8-K document View SEC filing for 8-K FORM 8-K 09 Sep 2011 08 Sep 2011 000-53713
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 24 Aug 2011 22 Aug 2011
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q OTTER TAIL CORPORATION 10-Q 09 Aug 2011 30 Jun 2011 000-53713
8-K Open 8-K document View SEC filing for 8-K OTTER TAIL CORP. 8-K 09 Aug 2011 08 Aug 2011 000-53713
8-K Open 8-K document View SEC filing for 8-K OTTER TAIL CORPORATION 8-K 03 Aug 2011 29 Jul 2011 000-53713
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 05 Jul 2011 30 Jun 2011
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4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 17 May 2011 16 May 2011
8-K Open 8-K document View SEC filing for 8-K OTTER TAIL CORPORATION 8-K 10 May 2011 09 May 2011 000-53713
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8-K Open 8-K document View SEC filing for 8-K OTTER TAIL CORPORATION 8-K 15 Apr 2011 11 Apr 2011 000-53713
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 12 Apr 2011 11 Apr 2011
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4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 12 Apr 2011 11 Apr 2011
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4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 12 Apr 2011 11 Apr 2011
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 12 Apr 2011 11 Apr 2011
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 12 Apr 2011 11 Apr 2011
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 12 Apr 2011 11 Apr 2011
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 12 Apr 2011 11 Apr 2011
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 04 Apr 2011 31 Mar 2011
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 04 Apr 2011 31 Mar 2011
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 10 Mar 2011 09 Mar 2011
8-K Open 8-K document View SEC filing for 8-K OTTER TAIL CORPORATION 8-K 08 Mar 2011 03 Mar 2011 000-53713
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 02 Mar 2011 11 Apr 2011 000-53713
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K OTTER TAIL CORP. 10-K 28 Feb 2011 31 Dec 2010 000-53713
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 15 Feb 2011 14 Feb 2011
8-K Open 8-K document View SEC filing for 8-K OTTER TAIL CORPORATION 8-K 08 Feb 2011 07 Feb 2011 000-53713
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4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 19 Nov 2010 17 Nov 2010
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q OTTER TAIL CORPORATION 10-Q 08 Nov 2010 30 Sep 2010 000-53713
8-K Open 8-K document View SEC filing for 8-K OTTER TAIL CORPORATION 8-K 29 Oct 2010 28 Oct 2010 000-53713
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 29 Oct 2010
CORRESP Open CORRESP document View SEC filing for CORRESP 25 Oct 2010
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 13 Oct 2010
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 04 Oct 2010 30 Sep 2010 000-53713
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 04 Oct 2010 30 Sep 2010
CORRESP Open CORRESP document View SEC filing for CORRESP 29 Sep 2010
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 16 Sep 2010
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 25 Aug 2010 25 Aug 2010
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 Aug 2010 13 Aug 2010
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q OTTER TAIL CORPORATION 10-Q 09 Aug 2010 30 Jun 2010 000-53713
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8-K Open 8-K document View SEC filing for 8-K FORM 8-K 29 Jun 2010 23 Jun 2010 000-53713
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8-K Open 8-K document View SEC filing for 8-K OTTER TAIL CORP. 8-K 04 May 2010 03 May 2010 000-53713
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 14 Apr 2010 12 Apr 2010 000-53713
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 13 Apr 2010 12 Apr 2010
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 13 Apr 2010 12 Apr 2010
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8-K Open 8-K document View SEC filing for 8-K FORM 8-K 05 Apr 2010 05 Apr 2010 000-53713
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8-K Open 8-K document View SEC filing for 8-K FORM 8-K 17 Mar 2010 17 Mar 2010 000-53713
424B5 Open 424B5 document View SEC filing for 424B5 FORM 424B5 17 Mar 2010 333-159137-99
ARS Open ARS document View SEC filing for ARS AUTO-GENERATED PAPER DOCUMENT 15 Mar 2010 31 Dec 2009 000-53713
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DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 05 Mar 2010 12 Apr 2010 000-53713
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10-K Open 10-K document View SEC filing for 10-K FORM 10-K 26 Feb 2010 31 Dec 2009 000-53713
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About this filer

Otter Tail Corp files with the SEC under CIK 0001466593. This page aggregates EDGAR filings and related ownership activity.

Industry: Electric Services.

See insider transactions for this issuer.

FAQ

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