# Filing Detail

Form 8-K - Current report:
SEC Accession No. 0001466593-25-000128
Filing Date
2025-12-18
Accepted
2025-12-18 09:16:12
Documents
17
Period of Report
2025-12-16
Items
Item 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
Item 7.01: Regulation FD Disclosure
Item 9.01: Financial Statements and Exhibits

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | 8-K | ottr-20251216.htm iXBRL | 8-K | 25307
2 | EX-99.1 | pressrelease-directorchang.htm | EX-99.1 | 8490
6 | GRAPHIC | clarkbiophoto002a.jpg | GRAPHIC | 39954
7 | GRAPHIC | image1a.jpg | GRAPHIC | 8395
8 | GRAPHIC | imagea.jpg | GRAPHIC | 1778491
9 | GRAPHIC | steverasche-110422a.jpg | GRAPHIC | 2865593
| Complete submission text file | 0001466593-25-000128.txt |  | 6615606

Data Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
3 | XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT | ottr-20251216.xsd | EX-101.SCH | 1788
4 | XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT | ottr-20251216_lab.xml | EX-101.LAB | 21629
5 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT | ottr-20251216_pre.xml | EX-101.PRE | 12512
20 | EXTRACTED XBRL INSTANCE DOCUMENT | ottr-20251216_htm.xml | XML | 3060

Mailing Address 215 S CASCADE ST PO BOX 496 FERGUS FALLS MN 56538-0496
Business Address 215 S CASCADE ST PO BOX 496 FERGUS FALLS MN 56538-0496 866-410-8780
Otter Tail Corp (Filer) CIK: 0001466593 (see all company filings)

EIN.: 270383995 | State of Incorp.: MN | Fiscal Year End: 1231
Type: 8-K | Act: 34 | File No.: 000-53713 | Film No.: 251581478
SIC: 4911 Electric Services
(CF Office: 01 Energy & Transportation)