Otter Tail Corporation is a holding company, through its subsidiaries, operates in three segments: Electric, Manufacturing and Plastics. The Company is engaged in the production, transmission, distribution and sale of electric energy in Minnesota, North Dakota and South Dakota. It also conducts manufacturing activities, such as contract machining, metal parts stamping and fabrication, and production of material and handling trays, horticultural containers and produce packaging. It is also involved in producing polyvinyl chloride (PVC) pipe at plants in North Dakota and Arizona. Otter Tail Power Company (OTP) is a wholly owned subsidiary of the company. The Company’s manufacturing and plastic pipe businesses are owned by its wholly owned subsidiary, Varistar Corporation (Varistar).