Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:
SEC Accession No. 0001466593-25-000034
Filing Date
2025-02-19
Accepted
2025-02-19 15:09:14
Documents
163
Period of Report
2024-12-31

Document Format Files

Seq Description Document Type Size
1 10-K ottr-20241231.htm   iXBRL 10-K 3238150
2 EX-10.20 a2024ex10202025executivean.htm EX-10.20 27826
3 EX-10.21 a2024ex1021formofperforman.htm EX-10.21 50006
4 EX-10.22 a2024ex1022formofrestricte.htm EX-10.22 36306
5 EX-10.24 a2024ex1024summaryofnonxem.htm EX-10.24 8396
6 EX-19 a2024ex19insidertradingand.htm EX-19 118416
7 EX-21 a2024ex21subsidiariesofreg.htm EX-21 6475
8 EX-23 a2024ex23consentofindepend.htm EX-23 2240
9 EX-24 a2024ex24powerofattorney.htm EX-24 11543
10 EX-31.1 a202410-kex311.htm EX-31.1 9593
11 EX-31.2 a202410-kex312.htm EX-31.2 9319
12 EX-32.1 a202410-kex321.htm EX-32.1 4263
13 EX-32.2 a202410-kex322.htm EX-32.2 4109
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21 GRAPHIC ottr-20241231_g11.jpg GRAPHIC 57694
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23 GRAPHIC ottr-20241231_g3.jpg GRAPHIC 43021
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25 GRAPHIC ottr-20241231_g5.jpg GRAPHIC 36959
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27 GRAPHIC ottr-20241231_g7.jpg GRAPHIC 37591
28 GRAPHIC ottr-20241231_g8.jpg GRAPHIC 72188
29 GRAPHIC ottr-20241231_g9.jpg GRAPHIC 57312
  Complete submission text file 0001466593-25-000034.txt   19462319

Data Files

Seq Description Document Type Size
14 XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT ottr-20241231.xsd EX-101.SCH 110422
15 XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT ottr-20241231_cal.xml EX-101.CAL 166376
16 XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT ottr-20241231_def.xml EX-101.DEF 573323
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18 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT ottr-20241231_pre.xml EX-101.PRE 925403
166 EXTRACTED XBRL INSTANCE DOCUMENT ottr-20241231_htm.xml XML 3502052
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-K | Act: 34 | File No.: 000-53713 | Film No.: 25639340
SIC: 4911 Electric Services
(CF Office: 01 Energy & Transportation)