IMAX CORPORATION EXHIBIT 21 SUBSIDIARIES OF IMAX CORPORATION Significant and other major subsidiary companies of the Registrant, as at December 31, 2005, comprise of the following: JURISDICTION OF PERCENTAGE HELD BY NAME OF SUBSIDIARY ORGANIZATION REGISTRANT - ------------------------------------------------- --------------- ------------------ Big Engine Films Inc. Delaware 100% David Keighley Productions 70MM Inc. Delaware 100% IMAX (Netherlands) B.V. Netherlands 100% IMAX Chicago Theatre LLC Delaware 100% IMAX II U.S.A. Inc. Delaware 100% IMAX Indianapolis LLC Indiana 100% IMAX Japan Inc. Japan 100% IMAX Minnesota Holding Co. Delaware 100% IMAX Rhode Island Limited Partnership Rhode Island 100% IMAX Scribe Inc. Delaware 100% IMAX Space Ltd. Ontario 100% IMAX Theatre Holding Co. Delaware 100% IMAX Theatre Holdings (OEI) Inc. Delaware 100% IMAX Theatre Management Company Delaware 100% IMAX Theatre Services Ltd. Ontario 100% IMAX U.S.A. Inc. Delaware 100% Miami Theatre LLC Delaware 100% Nyack Theatre LLC New York 100% Parker Pictures Ltd. (formerly Mitey Cinema Inc.) Ontario 100% Ridefilm Corporation Delaware 100% RPM Pictures Ltd. Ontario 100% Sacramento Theatre LLC Delaware 100% Sonics Associates, Inc. Alabama 100% Starboard Theatres Ltd. Canada 100% Tantus Films Ltd. Canada 100% Tantus II Films Ltd. Ontario 100% Taurus-Littrow Productions Inc. Delaware 100% 3D Sea II Ltd. Ontario 100%