# Filing Detail

Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:
SEC Accession No. 0001466593-22-000010
Filing Date
2022-02-16
Accepted
2022-02-16 16:42:45
Documents
140
Period of Report
2021-12-31

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | 10-K | ottr-20211231.htm iXBRL | 10-K | 3923080
2 | EX-21 | a2021ex21subsidiariesofreg.htm | EX-21 | 6577
3 | EX-23 | a2021ex23consentofindepend.htm | EX-23 | 2364
4 | EX-24 | a2021ex24powerofattorney.htm | EX-24 | 12186
5 | EX-31.1 | a202110-kex311.htm | EX-31.1 | 9694
6 | EX-31.2 | a202110-kex312.htm | EX-31.2 | 9554
7 | EX-32.1 | a202110-kex321.htm | EX-32.1 | 4364
8 | EX-32.2 | a202110-kex322.htm | EX-32.2 | 4344
14 | GRAPHIC | ottr-20211231_g1.jpg | GRAPHIC | 39004
15 | GRAPHIC | ottr-20211231_g2.jpg | GRAPHIC | 31340
16 | GRAPHIC | ottr-20211231_g3.jpg | GRAPHIC | 35738
17 | GRAPHIC | ottr-20211231_g4.jpg | GRAPHIC | 30996
18 | GRAPHIC | ottr-20211231_g5.jpg | GRAPHIC | 29831
19 | GRAPHIC | ottr-20211231_g6.jpg | GRAPHIC | 35027
20 | GRAPHIC | ottr-20211231_g7.jpg | GRAPHIC | 34262
21 | GRAPHIC | ottr-20211231_g8.jpg | GRAPHIC | 47926
22 | GRAPHIC | ottr-20211231_g9.jpg | GRAPHIC | 57853
| Complete submission text file | 0001466593-22-000010.txt |  | 18472716

Data Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
9 | XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT | ottr-20211231.xsd | EX-101.SCH | 96585
10 | XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT | ottr-20211231_cal.xml | EX-101.CAL | 130850
11 | XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT | ottr-20211231_def.xml | EX-101.DEF | 506549
12 | XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT | ottr-20211231_lab.xml | EX-101.LAB | 1118813
13 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT | ottr-20211231_pre.xml | EX-101.PRE | 784085
134 | EXTRACTED XBRL INSTANCE DOCUMENT | ottr-20211231_htm.xml | XML | 3989674

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.: 22644191
SIC: 4911 Electric Services