IMAX CORPORATION EXHIBIT 21 SUBSIDIARIES OF IMAX CORPORATION Significant and other major subsidiary companies of the Registrant, as at December 31, 2002, comprise of the following: JURISDICTION OF PERCENTAGE HELD BY NAME OF SUBSIDIARY ORGANIZATION REGISTRANT - ------------------------------------- --------------- ------------------ David Keighley Productions 70MM Inc. Delaware 100% IMAX II U.S.A. Inc. Delaware 100% IMAX Chicago Theatre LLC Delaware 100% IMAX Entertainment Pte. Ltd. Singapore 100% IMAX Forum Ride, Inc. Delaware 100% IMAX Japan Inc. Japan 100% IMAX Minnesota Holding Co. Delaware 100% IMAX (Netherlands) B.V. Netherlands 100% IMAX Rhode Island Limited Partnership Rhode Island 100% IMAX Sandde Animation Inc. Ontario 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% Mitey Cinema Inc. Ontario 100% Mountainview Theatre Management Ltd. Alberta 100% Nyack Theatre LLC Delaware 100% Ridefilm Corporation Delaware 100% Sacramento Theatre LLC Delaware 100% Sonics Associates, Inc. Alabama 100% Starboard Theatres Ltd. Canada 100% Tantus Films Ltd. Ontario 100% Wire Frame Films Ltd. Ontario 100%