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 CIK#: 0001466593 (see all company filings)

SIC: 4911 - ELECTRIC SERVICES
State location: MN | State of Inc.: MN | Fiscal Year End: 1231
(CF Office: 01 Energy & Transportation)
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Items 1 - 40  0001466593 Filings RSS Feed
Filings Format Description Filing Date File/Film Number
ARS  Documents Annual Report to Security Holders
Acc-no: 0001466593-25-000051 (34 Act)  Size: 35 MB
2025-03-03 000-53713
25694580
DEF 14A  Documents   Interactive Data Other definitive proxy statements
Acc-no: 0001466593-25-000049 (34 Act)  Size: 57 MB
2025-03-03 000-53713
25694526
DEFA14A  Documents Additional definitive proxy soliciting materials and Rule 14(a)(12) material
Acc-no: 0001466593-25-000047 (34 Act)  Size: 2 MB
2025-03-03 000-53713
25694501
10-K  Documents   Interactive Data Annual report [Section 13 and 15(d), not S-K Item 405]
Acc-no: 0001466593-25-000034 (34 Act)  Size: 19 MB
2025-02-19 000-53713
25639340
8-K  Documents   Interactive Data Current report, items 2.02 and 9.01
Acc-no: 0001466593-25-000027 (34 Act)  Size: 525 KB
2025-02-18 000-53713
25632865
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001466593-25-000023 Size: 14 KB
2025-02-13
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001466593-25-000021 Size: 13 KB
2025-02-13
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001466593-25-000019 Size: 13 KB
2025-02-13
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001466593-25-000017 Size: 12 KB
2025-02-13
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001466593-25-000015 Size: 14 KB
2025-02-13
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001466593-25-000014 Size: 12 KB
2025-02-13
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001466593-25-000012 Size: 13 KB
2025-02-07
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001466593-25-000010 Size: 16 KB
2025-02-07
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001466593-25-000008 Size: 15 KB
2025-02-07
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001466593-25-000006 Size: 16 KB
2025-02-07
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001466593-25-000004 Size: 14 KB
2025-02-07
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001466593-25-000002 Size: 15 KB
2025-02-07
8-K  Documents   Interactive Data Current report, item 8.01
Acc-no: 0001466593-24-000149 (34 Act)  Size: 147 KB
2024-12-31 000-53713
241592619
8-K  Documents   Interactive Data Current report, items 1.01, 2.03, and 9.01
Acc-no: 0001466593-24-000147 (34 Act)  Size: 2 MB
2024-12-16 000-53713
241551575
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0001466593-24-000140 (34 Act)  Size: 8 MB
2024-11-07 000-53713
241434264
8-K  Documents   Interactive Data Current report, items 2.02 and 9.01
Acc-no: 0001466593-24-000136 (34 Act)  Size: 473 KB
2024-11-05 000-53713
241425888
SC 13D/A  Documents [Amend] General Statement of Acquisition of Beneficial Ownership
Acc-no: 0001104659-24-105851 (34 Act)  Size: 47 KB
2024-10-03 005-84909
241351671
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001466593-24-000131 Size: 7 KB
2024-08-14
144  Documents Report of proposed sale of securities
Acc-no: 0002002698-24-000184 (33 Act)  Size: 5 KB
2024-08-13 000-53713
241202549
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0001466593-24-000129 (34 Act)  Size: 8 MB
2024-08-07 000-53713
241182594
8-K  Documents   Interactive Data Current report, items 2.02 and 9.01
Acc-no: 0001466593-24-000125 (34 Act)  Size: 473 KB
2024-08-06 000-53713
241177432
8-K  Documents   Interactive Data Current report, item 8.01
Acc-no: 0001466593-24-000121 (34 Act)  Size: 152 KB
2024-06-05 000-53713
241021196
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001466593-24-000119 Size: 5 KB
2024-05-28
SD  Documents Specialized disclosure report
Acc-no: 0001466593-24-000116 (34 Act)  Size: 51 KB
2024-05-24 000-53713
24984744
144  Documents Report of proposed sale of securities
Acc-no: 0001971857-24-000297 (33 Act)  Size: 4 KB
2024-05-24 000-53713
24983596
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0001466593-24-000113 (34 Act)  Size: 7 MB
2024-05-08 000-53713
24925581
8-K  Documents   Interactive Data Current report, items 2.02 and 9.01
Acc-no: 0001466593-24-000109 (34 Act)  Size: 432 KB
2024-05-07 000-53713
24920007
S-3ASR  Documents Automatic shelf registration statement of securities of well-known seasoned issuers
Acc-no: 0001466593-24-000103 (33 Act)  Size: 706 KB
2024-05-03 333-279100
24911872
S-3ASR  Documents Automatic shelf registration statement of securities of well-known seasoned issuers
Acc-no: 0001466593-24-000101 (33 Act)  Size: 304 KB
2024-05-03 333-279099
24911835
8-K  Documents   Interactive Data Current report, item 5.07
Acc-no: 0001466593-24-000085 (34 Act)  Size: 158 KB
2024-04-10 000-53713
24834450
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001466593-24-000083 Size: 15 KB
2024-04-09
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001466593-24-000081 Size: 432 KB
2024-04-09
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001466593-24-000079 Size: 432 KB
2024-04-09
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001466593-24-000077 Size: 431 KB
2024-04-09
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001466593-24-000075 Size: 430 KB
2024-04-09