Oopa! (greek Food Creations) Inc.
OpenListing Inc.
Operand Facility Services Corporation
Optenia, Inc.
Optilistic Inc.
Optimized-C Tech Corporation
Optimum Technology & System Solutions Inc.
Optoworks Inc.
Orchestream Americas Corporation
Organic Revolution Limited
Original Insight Inc.
Orion Academic Consultants Ltd.
Orion Technologies Distribution Inc.
Orman-Merrill Consulting, Inc.
Orranyx Software Corporation
OSI Land Systems Ltd.
OSI Marine Systems Ltd.
Osorees Products Inc.
Otemus Corporation
Ottawa Community Ice Partners