Exhibit 21-A
OTTER TAIL CORPORATION
Subsidiaries of the Registrant
February 25, 2011
Company | State of Organization | |
Otter Tail Power Company | Minnesota | |
Otter Tail Energy Services Company, Inc. | Minnesota | |
Overland Mechanical Services, Inc. | Minnesota | |
Green Hills Energy, LLC | Minnesota | |
Sheridan Ridge I, LLC | Minnesota | |
Sheridan Ridge II, LLC | Minnesota | |
Otter Tail Assurance Limited | Cayman Islands | |
Varistar Corporation | Minnesota | |
Northern Pipe Products, Inc. | North Dakota | |
Vinyltech Corporation | Arizona | |
T.O. Plastics, Inc. | Minnesota | |
DMI Industries, Inc. | North Dakota | |
DMI Canada, Inc. | Ontario, Canada | |
DMI Equipment, LLC* | Delaware | |
BTD Manufacturing, Inc. | Minnesota | |
Miller Welding & Iron Works, Inc. | Minnesota | |
ShoreMaster, Inc. | Minnesota | |
Galva Foam Marine Industries, Inc. | Missouri | |
Shoreline Industries, Inc. | Minnesota | |
Aviva Sports, Inc. | Minnesota | |
ShoreMaster Costa Rica, Limitada | Costa Rica | |
DMS Health Technologies, Inc. | North Dakota | |
DMS Imaging, Inc. | North Dakota | |
DMS Health Technologies – Canada, Inc. | North Dakota | |
DMS Topline Medical, Inc. | North Dakota | |
Aevenia, Inc. | Minnesota | |
Moorhead Electric, Inc. | Minnesota | |
Foley Company | Missouri | |
E. W. Wylie Corporation | North Dakota | |
Idaho Pacific Holdings, Inc. | Delaware | |
Idaho-Pacific Corporation | Idaho | |
Idaho-Pacific Colorado Corporation | Delaware | |
AWI Acquisition Company Limited | Prince Edward Island, Canada | |
AgraWest Investments Limited | Prince Edward Island, Canada |
*Inactive