# Filing Detail

Form 10-Q - Quarterly report [Sections 13 or 15(d)]:
SEC Accession No. 0001466593-25-000122
Filing Date
2025-11-05
Accepted
2025-11-05 16:19:03
Documents
87
Period of Report
2025-09-30

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | 10-Q | ottr-20250930.htm iXBRL | 10-Q | 1945220
2 | EX-31.1 | a2025q310-qex311.htm | EX-31.1 | 9491
3 | EX-31.2 | a2025q310-qex312.htm | EX-31.2 | 9348
4 | EX-32.1 | a2025q310-qex321.htm | EX-32.1 | 4101
5 | EX-32.2 | a2025q310-qex322.htm | EX-32.2 | 4077
| Complete submission text file | 0001466593-25-000122.txt |  | 9777744

Data Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
6 | XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT | ottr-20250930.xsd | EX-101.SCH | 53932
7 | XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT | ottr-20250930_cal.xml | EX-101.CAL | 98409
8 | XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT | ottr-20250930_def.xml | EX-101.DEF | 276344
9 | XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT | ottr-20250930_lab.xml | EX-101.LAB | 685456
10 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT | ottr-20250930_pre.xml | EX-101.PRE | 488974
90 | EXTRACTED XBRL INSTANCE DOCUMENT | ottr-20250930_htm.xml | XML | 1818014

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: 10-Q | Act: 34 | File No.: 000-53713 | Film No.: 251454338
SIC: 4911 Electric Services
(CF Office: 01 Energy & Transportation)