Otter Tail Corp. OTTR

What this company does

Otter Tail Corporation operates an electric utility and manufacturing and plastic pipe businesses. As of December 31, 2025, it employed 2,198 full-time employees. It organizes its operations into Electric, Manufacturing and Plastics segments. OTP, headquartered in Fergus Falls, Minnesota, is a vertically integrated, regulated utility with generation, transmission and distribution facilities serving approximately 134,000 residential, commercial and industrial customers across a service area of approximately 70,000 square miles of western Minnesota, eastern North Dakota and northeastern South Dakota. Manufacturing consists of businesses that provide metal fabrication services and manufacture thermoformed plastic products, with manufacturing facilities in Georgia, Illinois and Minnesota selling products primarily in the United States. Plastics consists of businesses producing PVC pipe primarily used in municipal water infrastructure at plants in North Dakota and Arizona, sold primarily in the western half of the United States and Canada. Otter Tail Power, the company's foundational business, dates back to 1907.

Written from the business description in OTTER TAIL CORPORATION's annual report to the U.S. Securities and Exchange Commission, filed 18 February 2026. Every sentence was checked against that document before publication.