O&M Realty Inc.
O' Pearl Corporation
O'neil Cabinets Corporation
O-Two Medical Technologies Inc.
O. & F. De-Rock Inc.
O. Buzio Restaurant Inc.
O.L.E.G. Energy Corporation
O.S. Multi-Advanced Services Limited
O.s.w. Investment Holdings (canada) Limited
Oak Temple Co. Inc.
Oakfirs Solutions Inc.
Oakland Transport Ltd.
Oakville Venue Corporation
Oakwood Financial Inc.
Oasis Bathrooms Inc.
Oasis Business Service Inc.
Oasistechdev International Corporation
Obaid It Consulting Inc.
Objectspheres Software Solutions Inc.
OC Financial Services Inc.