Orion Energy Corporation
Orion Lighting Technologies Inc.
Orley's Pyro-Technics (canada) Ltd.
Oro-Gold Holding Co. (1981) Ltd.
OroAndes Resource Corp.
Orriginal Sales & Consultants Inc.
Osborn & Lange Insurance Inc.
Osec Petroleum Canada Limited
Osi Wire And Cable Ltd.
OSM Flexmove Inc.
Ossifraga Limited
Ossington and Christie Consulting Inc.
Ostara Nutrient Recovery Technologies Inc.
Osteocalth Health Inc.
Osteopharm Technologies Limited
OTB Media Inc.
OTB Recycling Inc.
Ottarasko Mines Ltd.
Ottawa Valley Lumber Company, Limited
Otter Bay Productions Inc.