Companies catalogue
- O'Neill's Fast Food, Hamilton
- OMNI Foot Clinic, Burlington
- OPA! of Greece Milton Commons, Milton
- OVERALL FLOORING, Burlington
- Oakville Animal Control, Oakville
- Oakville Fire Department Station 1, Oakville
- Oakville Fire Station 3, Oakville
- Oakville Fire Station 4, Oakville
- Oakville Fire Station 5, Oakville
- Oakville Fire Station 6, Oakville
- Oakville Halal Grill, Oakville
- Oakville Hospital Foundation, Oakville
- Oakville Nissan, Oakville
- Oakville Parks Department, Oakville
- Oakville Resource Ctr, Oakville
- Oakville Road Constr Projects, Oakville
- Oakville Social & Community, Oakville
- Oakville Spa at the Beauty Institute, Oakville
- Odesco Inc, Edmonton
- Office of Paul Miller, MPP for Hamilton East - Stoney Creek, Hamilton
- Office of the Worker Adviser, Mississauga
- Ohm Mega Electrical Services, Edmonton
- Oil City Electric, Edmonton
- Okpala Law Offices, Hamilton
- Oliver's Steakhouse, Oakville
- Omar Alghabra, Member of Parliament, Mississauga
- Ombudsman For Banking Svc, Toronto
- Omnilectric Electrical Services, Edmonton
- On The Bun Burgers, Mississauga
- One Stop Fuel, Hamilton
- Ontario Association of Non-Profit Homes & Services for Seniors, Vaughan
- Ontario Criminal Div, Hamilton
- Ontario Driver-Vehicle Licence, Oakville
- Ontario Health Insurance, Hamilton
- Ontario Housing Ministry, Hamilton
- Ontario Housing Programs, Hamilton
- Ontario Industrial Fire Protection, Hamilton
- Ontario Labour Ministry, Mississauga
- Ontario Member of Parliament, Burlington
- Ontario Members of Parliament, Hamilton
- Ontario Members of Parliament, Oakville
- Ontario Pain Foundation, Burlington
- Ontario Patient Advocate Ofc, Hamilton
- Ontario Rental Housing Tribuna, Hamilton
- Organic Rainforest Company, Toronto
- Ornella Barber & Hair Styling, Burlington
- Osmow's, Mississauga
- Osprey Woods Public School, Mississauga
- Oughtred W, Burlington