# Filing Detail

Form ARS - Annual Report to Security Holders:
SEC Accession No. 0001466593-26-000025
Filing Date
2026-03-02
Accepted
2026-03-02 10:17:28
Documents
107
Period of Report
2025-12-31
Effectiveness Date
2026-03-02

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | ARS | a2025annualreportottr_no.htm | ARS | 574702
2 | GRAPHIC | a2025annualreportottr_no001.jpg | GRAPHIC | 127176
3 | GRAPHIC | a2025annualreportottr_no002.jpg | GRAPHIC | 119590
4 | GRAPHIC | a2025annualreportottr_no003.jpg | GRAPHIC | 251046
5 | GRAPHIC | a2025annualreportottr_no004.jpg | GRAPHIC | 269373
6 | GRAPHIC | a2025annualreportottr_no005.jpg | GRAPHIC | 151217
7 | GRAPHIC | a2025annualreportottr_no006.jpg | GRAPHIC | 157455
8 | GRAPHIC | a2025annualreportottr_no007.jpg | GRAPHIC | 214915
9 | GRAPHIC | a2025annualreportottr_no008.jpg | GRAPHIC | 160361
10 | GRAPHIC | a2025annualreportottr_no009.jpg | GRAPHIC | 193280
11 | GRAPHIC | a2025annualreportottr_no010.jpg | GRAPHIC | 130451
12 | GRAPHIC | a2025annualreportottr_no011.jpg | GRAPHIC | 307968
13 | GRAPHIC | a2025annualreportottr_no012.jpg | GRAPHIC | 255860
14 | GRAPHIC | a2025annualreportottr_no013.jpg | GRAPHIC | 198746
15 | GRAPHIC | a2025annualreportottr_no014.jpg | GRAPHIC | 240061
16 | GRAPHIC | a2025annualreportottr_no015.jpg | GRAPHIC | 137509
17 | GRAPHIC | a2025annualreportottr_no016.jpg | GRAPHIC | 277890
18 | GRAPHIC | a2025annualreportottr_no017.jpg | GRAPHIC | 308705
19 | GRAPHIC | a2025annualreportottr_no018.jpg | GRAPHIC | 338304
20 | GRAPHIC | a2025annualreportottr_no019.jpg | GRAPHIC | 138042
21 | GRAPHIC | a2025annualreportottr_no020.jpg | GRAPHIC | 302210
22 | GRAPHIC | a2025annualreportottr_no021.jpg | GRAPHIC | 337511
23 | GRAPHIC | a2025annualreportottr_no022.jpg | GRAPHIC | 321100
24 | GRAPHIC | a2025annualreportottr_no023.jpg | GRAPHIC | 294635
25 | GRAPHIC | a2025annualreportottr_no024.jpg | GRAPHIC | 267463
26 | GRAPHIC | a2025annualreportottr_no025.jpg | GRAPHIC | 287643
27 | GRAPHIC | a2025annualreportottr_no026.jpg | GRAPHIC | 286673
28 | GRAPHIC | a2025annualreportottr_no027.jpg | GRAPHIC | 353327
29 | GRAPHIC | a2025annualreportottr_no028.jpg | GRAPHIC | 355165
30 | GRAPHIC | a2025annualreportottr_no029.jpg | GRAPHIC | 331012
31 | GRAPHIC | a2025annualreportottr_no030.jpg | GRAPHIC | 361796
32 | GRAPHIC | a2025annualreportottr_no031.jpg | GRAPHIC | 373461
33 | GRAPHIC | a2025annualreportottr_no032.jpg | GRAPHIC | 340843
34 | GRAPHIC | a2025annualreportottr_no033.jpg | GRAPHIC | 301186
35 | GRAPHIC | a2025annualreportottr_no034.jpg | GRAPHIC | 331569
36 | GRAPHIC | a2025annualreportottr_no035.jpg | GRAPHIC | 355045
37 | GRAPHIC | a2025annualreportottr_no036.jpg | GRAPHIC | 159220
38 | GRAPHIC | a2025annualreportottr_no037.jpg | GRAPHIC | 265480
39 | GRAPHIC | a2025annualreportottr_no038.jpg | GRAPHIC | 181653
40 | GRAPHIC | a2025annualreportottr_no039.jpg | GRAPHIC | 323133
41 | GRAPHIC | a2025annualreportottr_no040.jpg | GRAPHIC | 219198
42 | GRAPHIC | a2025annualreportottr_no041.jpg | GRAPHIC | 217916
43 | GRAPHIC | a2025annualreportottr_no042.jpg | GRAPHIC | 285012
44 | GRAPHIC | a2025annualreportottr_no043.jpg | GRAPHIC | 229949
45 | GRAPHIC | a2025annualreportottr_no044.jpg | GRAPHIC | 216782
46 | GRAPHIC | a2025annualreportottr_no045.jpg | GRAPHIC | 231373
47 | GRAPHIC | a2025annualreportottr_no046.jpg | GRAPHIC | 267779
48 | GRAPHIC | a2025annualreportottr_no047.jpg | GRAPHIC | 258189
49 | GRAPHIC | a2025annualreportottr_no048.jpg | GRAPHIC | 280364
50 | GRAPHIC | a2025annualreportottr_no049.jpg | GRAPHIC | 327166
51 | GRAPHIC | a2025annualreportottr_no050.jpg | GRAPHIC | 306753
52 | GRAPHIC | a2025annualreportottr_no051.jpg | GRAPHIC | 315719
53 | GRAPHIC | a2025annualreportottr_no052.jpg | GRAPHIC | 265805
54 | GRAPHIC | a2025annualreportottr_no053.jpg | GRAPHIC | 363373
55 | GRAPHIC | a2025annualreportottr_no054.jpg | GRAPHIC | 291818
56 | GRAPHIC | a2025annualreportottr_no055.jpg | GRAPHIC | 185968
57 | GRAPHIC | a2025annualreportottr_no056.jpg | GRAPHIC | 136107
58 | GRAPHIC | a2025annualreportottr_no057.jpg | GRAPHIC | 69969
59 | GRAPHIC | a2025annualreportottr_no058.jpg | GRAPHIC | 145589
60 | GRAPHIC | a2025annualreportottr_no059.jpg | GRAPHIC | 181675
61 | GRAPHIC | a2025annualreportottr_no060.jpg | GRAPHIC | 306405
62 | GRAPHIC | a2025annualreportottr_no061.jpg | GRAPHIC | 364737
63 | GRAPHIC | a2025annualreportottr_no062.jpg | GRAPHIC | 295542
64 | GRAPHIC | a2025annualreportottr_no063.jpg | GRAPHIC | 314354
65 | GRAPHIC | a2025annualreportottr_no064.jpg | GRAPHIC | 341338
66 | GRAPHIC | a2025annualreportottr_no065.jpg | GRAPHIC | 359349
67 | GRAPHIC | a2025annualreportottr_no066.jpg | GRAPHIC | 263729
68 | GRAPHIC | a2025annualreportottr_no067.jpg | GRAPHIC | 172887
69 | GRAPHIC | a2025annualreportottr_no068.jpg | GRAPHIC | 221812
70 | GRAPHIC | a2025annualreportottr_no069.jpg | GRAPHIC | 173590
71 | GRAPHIC | a2025annualreportottr_no070.jpg | GRAPHIC | 184782
72 | GRAPHIC | a2025annualreportottr_no071.jpg | GRAPHIC | 258965
73 | GRAPHIC | a2025annualreportottr_no072.jpg | GRAPHIC | 248106
74 | GRAPHIC | a2025annualreportottr_no073.jpg | GRAPHIC | 178103
75 | GRAPHIC | a2025annualreportottr_no074.jpg | GRAPHIC | 174863
76 | GRAPHIC | a2025annualreportottr_no075.jpg | GRAPHIC | 222063
77 | GRAPHIC | a2025annualreportottr_no076.jpg | GRAPHIC | 285872
78 | GRAPHIC | a2025annualreportottr_no077.jpg | GRAPHIC | 301484
79 | GRAPHIC | a2025annualreportottr_no078.jpg | GRAPHIC | 171066
80 | GRAPHIC | a2025annualreportottr_no079.jpg | GRAPHIC | 239867
81 | GRAPHIC | a2025annualreportottr_no080.jpg | GRAPHIC | 268467
82 | GRAPHIC | a2025annualreportottr_no081.jpg | GRAPHIC | 216590
83 | GRAPHIC | a2025annualreportottr_no082.jpg | GRAPHIC | 188324
84 | GRAPHIC | a2025annualreportottr_no083.jpg | GRAPHIC | 264911
85 | GRAPHIC | a2025annualreportottr_no084.jpg | GRAPHIC | 269414
86 | GRAPHIC | a2025annualreportottr_no085.jpg | GRAPHIC | 366112
87 | GRAPHIC | a2025annualreportottr_no086.jpg | GRAPHIC | 318805
88 | GRAPHIC | a2025annualreportottr_no087.jpg | GRAPHIC | 264592
89 | GRAPHIC | a2025annualreportottr_no088.jpg | GRAPHIC | 320437
90 | GRAPHIC | a2025annualreportottr_no089.jpg | GRAPHIC | 231630
91 | GRAPHIC | a2025annualreportottr_no090.jpg | GRAPHIC | 196735
92 | GRAPHIC | a2025annualreportottr_no091.jpg | GRAPHIC | 283170
93 | GRAPHIC | a2025annualreportottr_no092.jpg | GRAPHIC | 139722
94 | GRAPHIC | a2025annualreportottr_no093.jpg | GRAPHIC | 260384
95 | GRAPHIC | a2025annualreportottr_no094.jpg | GRAPHIC | 50209
96 | GRAPHIC | a2025annualreportottr_no095.jpg | GRAPHIC | 70059
97 | GRAPHIC | a2025annualreportottr_no096.jpg | GRAPHIC | 133842
98 | GRAPHIC | a2025annualreportottr_no097.jpg | GRAPHIC | 89392
99 | GRAPHIC | a2025annualreportottr_no098.jpg | GRAPHIC | 103550
100 | GRAPHIC | a2025annualreportottr_no099.jpg | GRAPHIC | 190002
101 | GRAPHIC | a2025annualreportottr_no100.jpg | GRAPHIC | 63075
102 | GRAPHIC | a2025annualreportottr_no101.jpg | GRAPHIC | 310263
103 | GRAPHIC | a2025annualreportottr_no102.jpg | GRAPHIC | 258850
104 | GRAPHIC | a2025annualreportottr_no103.jpg | GRAPHIC | 29552
105 | GRAPHIC | a2025annualreportottr_no104.jpg | GRAPHIC | 94332
106 | GRAPHIC | a2025annualreportottr_no105.jpg | GRAPHIC | 156525
107 | GRAPHIC | a2025annualreportottr_no106.jpg | GRAPHIC | 41814
| Complete submission text file | 0001466593-26-000025.txt |  | 35245462

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: ARS | Act: 34 | File No.: 000-53713 | Film No.: 26704236
SIC: 4911 Electric Services
(CF Office: 01 Energy & Transportation)