Official SEC submissions

Otter Tail SEC Filings

Direct answer

Otter Tail's latest SEC filing is 8-K.

It was filed on September 1, 2026, and 40 recent filings are available.

Each row links directly to the SEC document and filing index.

Official SEC EDGAR submissions

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Recent SEC filings

8-K

Current report

Filed: 2026-09-01

Report date: 2026-08-28

8-K

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Insider transaction

Filed: 2026-08-12

Report date: 2026-08-10

FORM 4

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Insider transaction

Filed: 2026-08-11

Report date: 2026-08-07

FORM 4

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144

Planned securities sale

Filed: 2026-08-07

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10-Q

Periodic report

Filed: 2026-08-05

Report date: 2026-06-30

10-Q

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8-K

Current report

Filed: 2026-08-04

Report date: 2026-08-03

8-K

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8-K

Current report

Filed: 2026-06-18

Report date: 2026-06-17

8-K

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8-K

Current report

Filed: 2026-06-05

Report date: 2026-06-04

8-K

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8-K

Current report

Filed: 2026-05-29

Report date: 2026-05-28

8-K

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8-K

Current report

Filed: 2026-05-15

Report date: 2026-05-15

8-K

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10-Q

Periodic report

Filed: 2026-05-06

Report date: 2026-03-31

10-Q

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8-K

Current report

Filed: 2026-05-05

Report date: 2026-05-04

8-K

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Insider transaction

Filed: 2026-04-15

Report date: 2026-04-13

FORM 4

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Insider transaction

Filed: 2026-04-15

Report date: 2026-04-13

FORM 4

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Insider transaction

Filed: 2026-04-15

Report date: 2026-04-13

FORM 4

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Insider transaction

Filed: 2026-04-15

Report date: 2026-04-13

FORM 4

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8-K

Current report

Filed: 2026-04-15

Report date: 2026-04-13

8-K

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Insider transaction

Filed: 2026-04-14

Report date: 2026-04-13

FORM 4

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Insider transaction

Filed: 2026-04-14

Report date: 2026-04-13

FORM 4

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8-K

Current report

Filed: 2026-04-14

Report date: 2026-04-13

8-K

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Insider transaction

Filed: 2026-04-14

Report date: 2026-04-13

FORM 4

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Insider transaction

Filed: 2026-04-14

Report date: 2026-04-13

FORM 4

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Insider transaction

Filed: 2026-04-14

Report date: 2026-04-13

FORM 4

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Insider transaction

Filed: 2026-04-14

Report date: 2026-04-13

FORM 4

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Insider transaction

Filed: 2026-04-14

Report date: 2026-04-13

FORM 4

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Insider transaction

Filed: 2026-04-14

Report date: 2026-04-13

FORM 4

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Insider transaction

Filed: 2026-04-14

Report date: 2026-04-13

FORM 4

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Insider transaction

Filed: 2026-04-09

Report date: 2026-04-08

FORM 4

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8-K

Current report

Filed: 2026-03-23

Report date: 2026-03-19

8-K

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DEFA14A

Proxy statement

Filed: 2026-03-02

DEFA14A

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DEF 14A

Proxy statement

Filed: 2026-03-02

Report date: 2026-04-13

DEF 14A

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10-K/A

Periodic report

Filed: 2026-02-23

Report date: 2025-12-31

10-K/A

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10-K

Periodic report

Filed: 2026-02-18

Report date: 2025-12-31

10-K

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8-K

Current report

Filed: 2026-02-17

Report date: 2026-02-16

8-K

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Insider transaction

Filed: 2026-02-12

Report date: 2026-02-10

FORM 4

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Insider transaction

Filed: 2026-02-12

Report date: 2026-02-10

FORM 4

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Insider transaction

Filed: 2026-02-12

Report date: 2026-02-10

FORM 4

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Insider transaction

Filed: 2026-02-12

Report date: 2026-02-10

FORM 4

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Insider transaction

Filed: 2026-02-12

Report date: 2026-02-10

FORM 4

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Insider transaction

Filed: 2026-02-12

Report date: 2026-02-10

FORM 4

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Verified data

Recent filing categories: 5
Recent filings: 40
SEC CIK: 0001466593
Latest filing date: September 1, 2026

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