Otter Tail CORP 8-K Filing

Key Financial Figures

• $5.00 — ch registered Common Shares, par value $5.00 per share OTTR The Nasdaq Stock Market

Filing Documents

• ottr-20251103.htm (8-K) — 21KB
• q32025earningsreleaseex991.htm (EX-99.1) — 343KB
• image4.jpg (GRAPHIC) — 6KB
• 0001466593-25-000119.txt ( ) — 513KB
• ottr-20251103.xsd (EX-101.SCH) — 2KB
• ottr-20251103_lab.xml (EX-101.LAB) — 22KB
• ottr-20251103_pre.xml (EX-101.PRE) — 13KB
• ottr-20251103_htm.xml (XML) — 3KB

02 Results of Operations and Financial Condition

Item 2.02 Results of Operations and Financial Condition On November 3, 2025 Otter Tail Corporation issued a press release announcing its consolidated financial results for the third quarter of 2025. A copy of the press release is furnished herewith as Exhibit 99.1. The information in this Item 2.02 (including Exhibit 99.1 attached hereto) shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933 or the Securities Exchange Act of 1934, except as shall be expressly set forth by specific reference in such filing.

01 Financial Statements and Exhibits

Item 9.01 Financial Statements and Exhibits (d) Exhibits 99.1 Press Release issued November 3, 2025. 104 Cover Page Interactive Data File (embedded within the Inline XBRL document). SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. OTTER TAIL CORPORATION Date: November 4, 2025 By: /s/ Todd R. Wahlund Todd R. Wahlund Chief Financial Officer