Suppliers
- O.K. Industries Ltd.67
- O'Hanlon Paving64
- O'Neal General Contracting Ltd28
- O'Regan's Chevrolet Buick GMC Cadillac Ltd43
- Oakcreek Golf & Turf LP50
- Oburo41
- Ocean Contractors168
- Ocean Paving Ltd.44
- OCLC, Inc.44
- Octopus-ITSM.com inc.26
- Octosafes Inc.96
- Office Interiors58
- Office Interiors (NB) Inc33
- OJ Compagnie28
- OJCR Construction Ltd.25
- Okanagan Aggregates Ltd.109
- Okiok Data Ltée69
- Olson Construction36
- Olson Construction And Consulting Services Ltd46
- Olympus Canada Inc840
- Omni-Med.com Inc.56
- Omni-Tech Sports26
- Omnitech Electronics Incorporated42
- Omnitech Innovations Inc.27
- Omnitech Labs Inc.65
- Ondel Inc.36
- onepoint Canada inc.48
- onepoint Développement inc.41
- Onico inc.56
- Online Constructors Ltd.45
- OnX Enterprise Solutions Ltd.169
- Opale International Inc50
- Open Text Corporation224
- OpenFrame Technologies, Inc.48
- Opsis, Gestion d'infrastructures inc.92
- Opti-Tech Scientific Inc.70
- Optimum 24/736
- Optimum Solutions Inc143
- Optimus SBR Inc.31
- OPTION aménagement inc.65
- Optisigma Inc.90
- Oracle Canada ULC1,005
- Orange Paysagement Inc.108
- Orange Trafic inc.85
- Orangutech Inc202
- Orbis Risk Consulting Inc.46
- Orizon Mobile25
- Orkin Canada48
- Ortec Environnement Services Inc.131
- Ortho Clinical Diagnostics37
- Ortho-Clinical Diagnostics Canada Holdings Corporation79
- Orthofab39
- Oslo Construction Inc.53
- Otis Canada Inc.221
- Ottawa Security Systems and Communications Ltd.26
- Ouellet Architecte74
- Outdoor Outfits Ltd.55
- Outlaw Eagle Manufacturing Ltd.52
- Ovid Technologies, Inc.44
- OXARO Inc.43
- Oxford Nanopore Technologies Canada Limited25
- Oxford University Press62
- Oxoid Company106