# Filing Detail

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
19 | GRAPHIC | ottr-20241231_g1.jpg | GRAPHIC | 50145
20 | GRAPHIC | ottr-20241231_g10.jpg | GRAPHIC | 43067
21 | GRAPHIC | ottr-20241231_g11.jpg | GRAPHIC | 57694
22 | GRAPHIC | ottr-20241231_g2.jpg | GRAPHIC | 37877
23 | GRAPHIC | ottr-20241231_g3.jpg | GRAPHIC | 43021
24 | GRAPHIC | ottr-20241231_g4.jpg | GRAPHIC | 37255
25 | GRAPHIC | ottr-20241231_g5.jpg | GRAPHIC | 36959
26 | GRAPHIC | ottr-20241231_g6.jpg | GRAPHIC | 38060
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
17 | XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT | ottr-20241231_lab.xml | EX-101.LAB | 1238248
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)