Otter Tail Corp

For the period ended Mar 31, 2026. Filed May 6, 2026.

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A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Mar 31, 2026 · Filed May 6, 2026

OTTR$79.86+1.8%Stored close · as of Nov 9, 2026

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Item 6. Exhibits

ITEM 6.	EXHIBITS

The following Exhibits are filed as part of, or incorporated by reference into, this report.

No.	Description
10.1	Form of Executive Performance Share Award Agreement - Cash Settlement (Executives)
10.2	Note Purchase Agreement dated as of March 19, 2026, between Otter Tail Power Company and the Purchasers named therein
31.1	Certification of Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Certification of Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1	Certification of Chief Executive Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2	Certification of Chief Financial Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.SCH	Inline XBRL Taxonomy Extension Schema Document
101.CAL	Inline XBRL Taxonomy Extension Calculation Linkbase Document
101.LAB	Inline XBRL Taxonomy Extension Label Linkbase Document
101.PRE	Inline XBRL Taxonomy Extension Presentation Linkbase Document
101.DEF	Inline XBRL Taxonomy Extension Definition Linkbase Document
104	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)

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