EX-21 2 a2021ex21subsidiariesofreg.htm EX-21 Document

Exhibit 21
OTTER TAIL CORPORATION
Subsidiaries of the Registrant
February 16, 2022

CompanyState of Organization
BTD Manufacturing, Inc.  Minnesota
Northern Pipe Products, Inc.  North Dakota
Otter Tail Assurance Limited Cayman Islands
Otter Tail Power Company Minnesota
T.O. Plastics, Inc.  Minnesota
Varistar Corporation  Minnesota
Vinyltech Corporation Arizona