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)