# Filing Detail

Form 10-Q - Quarterly report [Sections 13 or 15(d)]:
SEC Accession No. 0001466593-25-000107
Filing Date
2025-08-06
Accepted
2025-08-06 13:54:15
Documents
87
Period of Report
2025-06-30

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | 10-Q | ottr-20250630.htm iXBRL | 10-Q | 1852592
2 | EX-31.1 | a2025q210-qex311.htm | EX-31.1 | 9489
3 | EX-31.2 | a2025q210-qex312.htm | EX-31.2 | 9346
4 | EX-32.1 | a2025q210-qex321.htm | EX-32.1 | 4094
5 | EX-32.2 | a2025q210-qex322.htm | EX-32.2 | 4070
| Complete submission text file | 0001466593-25-000107.txt |  | 9502111

Data Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
6 | XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT | ottr-20250630.xsd | EX-101.SCH | 53042
7 | XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT | ottr-20250630_cal.xml | EX-101.CAL | 95824
8 | XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT | ottr-20250630_def.xml | EX-101.DEF | 264876
9 | XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT | ottr-20250630_lab.xml | EX-101.LAB | 665371
10 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT | ottr-20250630_pre.xml | EX-101.PRE | 476094
90 | EXTRACTED XBRL INSTANCE DOCUMENT | ottr-20250630_htm.xml | XML | 1789341

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.: 251188810
SIC: 4911 Electric Services
(CF Office: 01 Energy & Transportation)