Cass County Electric Cooperative, 4100 32nd Ave S, Fargo, ND 58104, US

Otter Tail Corporation is a diversified corporation with interests in the electric, health services, manufacturing, plastics, food ingredient processing and other businesses. Its operating companies collectively serve customers in nearly 50 states and in Canada. The company trades on NASDAQ under the symbol OTTR. Otter Tail Corporation provides electricity and energy services to nearly a quarter million people in Minnesota, North Dakota and South Dakota. Through its subsidiary companies, Otter Tail Corporation sells and installs diagnostic medical equipment, patient monitoring equipment and medical supplies. The company also offers stamping, fabrication, tubing, welding, machining and tooling. Otter Tail Corporation is headquartered in Fergus Falls, Minn.