Companies catalogue
- O'Connor Sraj Lawyers, Hampton
- OFTB, Hawthorn
- OMS Australia, Altona
- ONSEMI PTY LTD, Moorabbin
- OSCAR CALVO, East Melbourne
- OZ Great Value, Somerton
- OZ Knits, Ringwood
- OZMO Engineering, Ringwood
- OZTorches.com.au, Bayswater
- Oaklands Recording Studios Australia, Nunawading
- Oakleigh Central Lotto, Oakleigh
- Oakleigh Locksmiths, Oakleigh
- Oakleigh Mowerpower, Bentleigh East
- Obara Australia, Hallam
- Oceansouth Australia, Braeside
- Odemi Leather, Carnegie
- Off The Hook, Caulfield North
- Office Supplies Express, Glen Waverley
- Okuma Australia Pty Ltd, Rowville
- Old Richmond Cellars, Richmond
- Olympic Village Licensed Cellar, Heidelberg West
- Omni, Nunawading
- Omniblend Nourish, Brooklyn
- Omnibond, Clayton
- Omond & Co, Albert Park
- OnShow Solutions Pty Ltd, Abbotsford
- One Focus Landscapes, Frankston
- One White Lie, Port Melbourne
- One call legal and conveyancing pty ltd, Glen Waverley
- Only Luxury but Affordable, Moorabbin
- Onyx Car Rentals, Dandenong
- Open Road Roadsters, Ringwood North
- Optical Manufacturers PTY Ltd., Moorabbin
- OptoTech Pty Ltd, Southbank
- Organic Response, Abbotsford
- Origin Laser - Quality Laser cutting/engraving, Bayswater North
- Origin Systems Pty Ltd, Oakleigh
- Ormond Coin Laundry, Ormond
- Orta Landscape Designs, Essendon
- Osiris Energy Co. Ltd., Cheltenham
- Oslek Flooring, Mitcham
- Ottomansonline, Brighton East
- Our Beautiful Balnarring Laundrette, Balnarring
- Outdeco Living, Campbellfield
- Outdeco Living, Dandenong South
- Outdoor Creations, Greensborough, Melbourne
- Outdoor Power Equipment Warehouse, Dandenong South
- Outdoor Timber, Bayswater
- Outdoor cushions melbourne, Mooroolbark
- Outfit.io Brand Automation & Marketing Production, South Brisbane
- Outside & In Concepts, Virginia
- Overall Stainless, Kinglake
- Owen Truss, Springvale
- Oxley Legal, Hawthorn
- Oz Car Rental, Seddon
- Oz Intimates, Burnside Heights
- Oz Locksmiths, Clayton
- OzTables, McKinnon
- Ozhifi, Port Melbourne
- Ozlite PTY Ltd., Wantirna South
- Oztoy Jigsaw Manufacturing, Bentleigh East
- Ozzie Blades, Reservoir