Otter Tail Corp

Nasdaq:OTTR

Electric Services·FERGUS FALLS, MN

S. state of Minnesota.

CEO

Macfarlane Charles S

CFO

Wahlund Todd R

Financials

20 shown

Type	Period	Ended	Filed
10-K/A	FY 2025	12/31/25	2/23/26	→
10-K	FY 2025	12/31/25	2/18/26	→
10-Q	Q3 2025	9/30/25	11/5/25	→
10-Q	Q2 2025	6/30/25	8/6/25	→
10-Q	Q1 2025	3/31/25	5/7/25	→
10-K	FY 2024	12/31/24	2/19/25	→
↓

Earnings Releases (8-K)

34 shown

Filed	Period
2/17/26	Q1 FY2026	→
11/4/25	Q4 FY2025	→
8/5/25	Q3 FY2025	→
5/6/25	Q2 FY2025	→
2/18/25	Q1 FY2025	→
11/5/24	Q4 FY2024	→
↓

News (8-K)

46 shown

Filed	Type	Description
12/18/25	Exec Change	Departure or Appointment of Directors or Certain Officers	→
6/6/25	New Debt	Creation of a Direct Financial Obligation	→
6/5/25	Other	Other Events	→
4/17/25	Vote	Submission of Matters to a Vote of Security Holders	→
3/31/25	Agreement	Entry into a Material Definitive Agreement	→
12/31/24	Other	Other Events	→
↓

Prospectuses & Registrations

40 shown

Filed	Form	Description
3/2/26	ARS	ARS	→
3/3/25	ARS	ARS	→
5/3/24	S-3ASR	S-3ASR	→
5/3/24	S-3ASR	S-3ASR	→
2/28/24	ARS	ARS	→
4/17/23	S-8	S-8	→
↓

Filing History(841 filings)

TypeDateAccessionPeriodSize

ARS

Mar 2, 2026

0001466593-26-000025ARS

Dec 31, 2025

33.6 MB

DEFA14A

Mar 2, 2026

0001466593-26-000024DEFA14A

—

7.4 MB

DEF 14A

Mar 2, 2026

0001466593-26-000023DEF 14A

Apr 13, 2026

88.4 MB

10-K/A

Feb 23, 2026

0001466593-26-00001510-K/A

Dec 31, 2025

16.2 MB

PRE 14A

Feb 18, 2026

0001466593-26-000010PRE 14A

Apr 13, 2026

86.1 MB

10-K

Feb 18, 2026

0001466593-26-00000810-K

Dec 31, 2025

18.9 MB

8-K

Feb 17, 2026

0001466593-26-0000028-K

Feb 16, 2026

521.4 KB

Feb 12, 2026

0001639060-26-000006FORM 4

Feb 10, 2026

13.0 KB

Feb 12, 2026

0001605621-26-000005FORM 4

Feb 10, 2026

13.1 KB

Feb 12, 2026

0001278053-26-000005FORM 4

Feb 10, 2026

13.9 KB

Feb 12, 2026

0001559334-26-000004FORM 4

Feb 10, 2026

12.4 KB

Feb 12, 2026

0001726153-26-000005FORM 4

Feb 10, 2026

13.2 KB

Feb 12, 2026

0002002077-26-000005FORM 4

Feb 10, 2026

12.5 KB

Feb 9, 2026

0002002077-26-000002FORM 4

Feb 6, 2026

14.3 KB

Feb 9, 2026

0001605621-26-000002FORM 4

Feb 6, 2026

15.2 KB

Feb 9, 2026

0001278053-26-000002FORM 4

Feb 6, 2026

16.0 KB

Feb 9, 2026

0001639060-26-000002FORM 4

Feb 6, 2026

15.1 KB

Feb 9, 2026

0001559334-26-000002FORM 4

Feb 6, 2026

14.6 KB

Feb 9, 2026

0001726153-26-000002FORM 4

Feb 6, 2026

15.3 KB

Jan 6, 2026

0001297719-26-000003FORM 3

Jan 1, 2026

3.7 KB

Jan 6, 2026

0001629899-26-000003FORM 3

Jan 1, 2026

3.2 KB

8-K

Dec 18, 2025

0001466593-25-0001288-K

Dec 16, 2025

6.3 MB

10-Q

Nov 5, 2025

0001466593-25-00012210-Q

Sep 30, 2025

9.3 MB

8-K

Nov 4, 2025

0001466593-25-0001198-K

Nov 3, 2025

513.0 KB

10-Q

Aug 6, 2025

0001466593-25-00010710-Q

Jun 30, 2025

9.1 MB

25 filings shown

Filed	Form	Description
5/30/25	SD	SD	→
8/13/24	144	144	→
5/24/24	SD	SD	→
5/24/24	144	144	→
11/20/23	144	144	→
5/25/23	SD	SD	→
↓

Otter Tail Corp

Financials

Earnings Releases (8-K)

News (8-K)

Prospectuses & Registrations

Filing History(841 filings)

Proxies

Ownership

Other Filings

Filed	Form	Description
2/12/26	4	4	→
2/12/26	4	4	→
2/12/26	4	4	→
2/12/26	4	4	→
2/12/26	4	4	→
2/12/26	4	4	→
↓