Companies catalogue
- O'Reillys Firearms, Thornbury
- O'Shannassy Fish & Chips, Sunbury
- O'shannassy Meats, Sunbury
- OGIN DAWOOD STRUCTURAL & CIVIL ENGINEERING, CAROLINE SPRING
- OMX Solutions, Melbourne
- OPSM Melton, Melton
- ORileys Coaches, New Gisborne
- OZ Food Industries, Thornbury
- OZ Seals, Tullamarine
- OZINET Performance Wear, East Ballina
- Oarsome Drive Childcare Centre, Delahey
- Oaten's Carpet Court, Casino
- Object Consulting, Melbourne
- Oblica, Fitzroy
- OceanaGold Corporation, Melbourne
- Oceans Edge Fresh Fish and Chippery, Caroline Springs
- Oceanside Fencing, Lennox Head
- Odessa Ave Milk Bar, Keilor Downs
- Off Ya Tree, Taylors Lakes
- Officeworks Epping, Epping
- Olive Tree Cove, Caroline Springs
- Ollie's Phone & Computer Repair, Sunbury
- Olympic Park Sports Medicine Centre - Lily Chiu, Melbourne
- Olympus Marble, Heidelberg West
- Omega Frozen Food Service PTY LTD, North Melbourne
- Omnific Design, Williamstown
- On the Mend Shoe & Bag Repairs, Fitzroy
- On-Site Computer Clean, Gisborne South
- OnTheGo Phone & Computer Repairs - Melbourne CBD Chinatown, Melbourne
- One Call Classic Plastering, Kings Park
- One Day Bridal, South Melbourne
- One Stop Anime, Melbourne
- One Stop Corner Shop, Deer Park
- One Stop Sound & Vision, Craigieburn
- One Way Fresh Supermarket, Reservoir
- One Woman, Ballina
- One-Shot Ice Cream Corporation, Maidstone
- OneBee Convenience Pty Ltd, Campbellfield
- Online Cab Service Melbourne - Tickcars, Southbank
- Online Coins and Collectables, Lismore
- Open Table Catering Byron Bay Office, Byron Bay
- Opera Australia, Melbourne
- Optimal Fund Management Australia Pty, Melbourne
- Optimum Electronic Solutions, Thomastown
- Opus International Consultants, Melbourne
- Orange Business Services, Melbourne
- Organic Formulations Pty Ltd, Sunbury
- Organic Wholefoods Brunswick, Brunswick East
- Organic Wholefoods Fitzroy, Fitzroy
- Organic Wholefoods Flemington, Melbourne
- Origin Energy, Melbourne
- Oroton Emporium, Melbourne
- Ortho Chemicals Australia, Kensington
- Ostara Australia, Sunbury
- Otto & Spike, Brunswick
- Our Daily Bread Cafe, Broadwater
- Outlaw RC Hobbies, Brunswick West
- Outside The Box Training, Romsey
- Overseas Education Group, Melbourne
- OzSpy Security Solutions, Brunswick
- Ozi Go Car Wash Byron Bay, Byron Bay
- Oziental Foods, Campbellfield