Companies catalogue
- O'Brien Signs, Heathmont
- O.M.A. Shopfitting Systems, Bayswater
- OC STONE, Montmorency
- OCV Beleura Private Hospital, Mornington
- ODOS, Melbourne
- OH'S FLOOR CARE , OH'S TAEKWONDO ACADEMY, Hoppers Crossing
- OLSH Bentleigh, Bentleigh
- OMSCO, Tullamarine
- OPSM, Canberra
- OPSM, Belconnen
- OPSM Gungahlin, Gungahlin
- OZHelicopters.com, Moorabbin Airport
- Oakleigh Cannons FC, Melbourne
- Oakleigh Police Station, Oakleigh
- Oakleigh Senior Citizens Centre Inc., Oakleigh
- Obesity Surgery Melbourne, Richmond
- Ocean Odyssey Pty Ltd, Box Hill South
- Odin E-Waste, Carrum Downs
- Office Boy Workplace Environments, Dandenong
- Office Essentials, Phillip
- OfficeEssential Office National, Phillip
- Officeworks Tuggeranong, Greenway
- Oh's Taekwondo Centre Essendon, Essendon
- Oishii Sushi, Camberwell
- Oishii Sushi QV, Melbourne
- Okoze Sushi, South Yarra
- Old Carey Cricket Club, Bulleen
- Old Paradians Cricket Club, Bundoora
- Old Scotch Soccer Club, Hawthorn
- Oldfields Scaffolding Melbourne, Knoxfield
- Olinda Police Station, Olinda
- Oliver Technologies Pty Ltd, Dandenong South
- Olympic Saddlery, Lilydale
- Omega Trampoline Sports Club, Rowville
- One Scaf Pty Ltd, Coolaroo
- OneTrade Stockbroking Pty Ltd, Melbourne
- Online Computer Technician, Clayton
- Onsite Signs, Seaford
- Onsite Steelfab, Bayswater
- Opening Doors School Of Languages, Richmond
- Optics Canberra, Canberra
- Optimal Pharmacy Plus, Macquarie
- Orange Serviced Apartment, Glen Waverley
- Origin Driving School Berwick, Berwick
- Orion Services Group, Dandenong South
- Ormond Scientific, Ormond
- Ormond Tennis Club, Ormond
- OrthoSport Victoria, Richmond
- Oshin Sushi Bar PTY Ltd., Melbourne
- Ostrava Equities Pty Ltd, Melbourne
- Our Lady Star of the Sea Primary School, Cowes
- Oval 20, Bill Woodfull Oval, Albert Park
- Oxford Canberra Outlet Centre, Fyshwick
- Oxley Stadium, Chirnside Park
- Oz Home Share Pty Ltd, Clayton
- Oz Metal Group Pty Ltd, Sunshine
- Oz Nails, Manuka
- Oz Plank, Bayswater North
- Oz Skin Cancer Clinics, Pakenham
- OzSkinScan Skin Cancer Clinic, Cheltenham
- Ozmedica Skin & Laser Clinic Melbourne | Fat Removal | Tattoo Removal | Laser Skin Treatments, Malvern
- Ozschola Pty Ltd, Melbourne