Companies catalogue
- OPS Flea Market & Indoor Outdoor Storage, Lindsay
- Oak Ridges Endoscopy Centre, Richmond Hill
- Oak Ridges Equestrian Centre, Orono
- Ocala Winery Groups Inc., Port Perry
- Oceana, Edmonton
- Off The Hook Fishbar, Toronto
- Office of Hon. Peter Kent PC, MP, Vaughan
- Old Dutch., Toronto
- Olde Tyme Fish & Chips, Bowmanville
- Olde Yorke Fish & Chips, Toronto
- Olympus Burger, Port Hope
- Omegon North Tech., Toronto
- On The Spot Beauty Bar-By Appointment Only, Oshawa
- One Good Turn, Edmonton
- One Health Family Practice, Ajax
- One2One Esthetics, Oshawa
- One2Snacks, Toronto
- Ontario Amateur Wrestling Assn, Toronto
- Ontario Early Years Centre - Oak Ridges, Richmond Hill
- Ontario Enforcement Office, Oshawa
- Ontario Equestrian, Richmond Hill
- Ontario Federation of Labour, Toronto
- Ontario Fire & Life Safety Educators, Richmond Hill
- Ontario Gov, Toronto
- Ontario Historical Society, Toronto
- Ontario Shores Centre, Whitby
- Ontario Workplace Inclusion Program, Oshawa
- Operation Scugog Food Bank, Port Perry
- Optical in Loblaws, Pickering
- Optical in Real Canadian Superstore, Oshawa
- Optical in Real Canadian Superstore, Whitby
- Optical in Real Canadian Superstore, Ajax
- Organics Farm, Markham
- Oriana Financial Group, Ajax
- Orono Crown Lands, Clarington
- Oscar Coffee & Espresso Bar, Toronto
- Oshawa Clinic Foot Care Centre, Oshawa
- Oshawa Eye Care- Dr. Neil Carvalho And Associates, Oshawa
- Oshawa Eye Health Clinic, Oshawa
- Oshawa Fire Station 1, Oshawa
- Oshawa Fire Station 2, Oshawa
- Oshawa Fire Station 4, Oshawa
- Oshawa Gas Bar, Oshawa
- Oshawa Mortgage Group, Oshawa
- Oshawa NASC Hockey, Oshawa
- Oshawa Optometric Centre, Oshawa
- Oshawa Sexual Health Clinic, Oshawa
- Oshawa's Handyman, Oshawa
- ohSHAWARMA, Courtice