Companies catalogue
- O'Reilly Agricultural Centre, Boondall
- OATLEY 5 Star Dry Cleaners, Oatley
- OCC Apparel, Sydenham
- ODNA - Outdoor Digital Network Advertising, Greenslopes
- OEM GPS Australia, Brookvale
- OHMI, Quakers Hill
- ONE Commercial, Sydney
- ONO, Toongabbie
- OSHKOSH LIFE, Miranda
- OZ Grooming World, Prestons
- OZ Hand Car Wash, Padstow
- OZ Mobile Phone Repair - Rockdale, Rockdale
- OZ shine hand car wash, Merrylands
- OZLANA UGG, Rosebery
- Oasis Car Wash, Crows Nest
- Oatley West OOSH, Caringbah
- Oceanic Distribution, Caringbah
- Oddity design, Beverley Park
- Office Cleaning Services in Sydney, Carramar
- Oh Boo Chocolates, Barangaroo
- Ohmic Controls PTY Ltd., Minto
- Oilseed Products Australia PTY Ltd., Horsley Park
- Old English Toffee & Sweet Shop, Windsor
- Old Shoe Box Co, Narangba
- Olga's Clothing Repair & Alterations, Campbelltown
- Oliver Brown, Cherrybrook
- Oliver Brown, Rouse Hill
- Oliver Brown Belgian Chocolate Cafe Casula, Casula
- Ollie's Place, Bankstown
- Ollie's Place Kidswear, Campbelltown
- Ollie's Place Kidswear, Narellan
- Olymax Quality Used Cars, West Ryde
- Omni Tanker Pty Ltd, Smeaton Grange
- Omniflex, Botany
- Omocha Card Shop, Cabramatta
- Omya Australia Pty. Ltd, Lindfield
- On Duty, Holsworthy
- One Click Communication Mt Annan - Vodafone Independent Dealer, Mount Annan
- One Pot Catering, Sydney
- One Stop Catering Shop, Ingleburn
- One Stop Kidz Shop, Yagoona
- One Touch Hand Car Wash Cafe, Fairfield
- Online Real Estate, Campsie
- Online Workwear, Footwear Shopping Store Sydney NSW, Rydalmere
- Ontera - Milliken (Australia) P/L, Surry Hills
- Ontera - Milliken (Australia) Pty Ltd, Northmead
- Opal Coffee, Saint Peters
- Opal Products, Girraween
- Open Trading Network, Saint Peters
- Optima Air Conditioning Services, Forest Lake
- Optraffic Signs Australia, Wetherill Park
- Optus, Campbelltown
- Optus, Liverpool
- Optus, Miranda
- Optus, Merrylands
- Optus, Penrith
- Optus, Brookvale
- Optus, Neutral Bay
- Orana Car & Truck Rental, Tempe
- Orana Car & Truck Rental, Artarmon
- Orana Car & Truck Rentals Western Sydney, Chester Hill
- Order-In Corporate Catering, North Sydney
- Orica Australia, Port Botany
- Orientile, Ingleburn
- Origin Traders, Arndell Park
- Original Threads, Jamisontown
- Orion Compressors, Archerfield
- Oscar Auto Services Solutions, Homebush
- Oscar Clothing Alterations & Repair, Bondi Junction
- Oscillation Pty Ltd, Hornsby
- Osman Designpac Building Designers, Underwood
- Outback Batteries, Ciccone
- Outback Mechanical & Refrigeration Services PTY LTD, Ciccone
- Outokumpu Pty. Ltd., Sydney
- Outpost Agency, Rosebery
- Oven Parts Australia, Loganholme
- Over Wheels Sydney Car Care & Detailing, Maroubra
- Owen Architecture, Gordon Park
- Oxford, Castle Hill
- Oxford Agency, Darlinghurst
- Oxford Alexandria Outlet, Alexandria
- Oxford Birkenhead Point Outlet, Drummoyne
- Oxford Chatswood Westfield, Chatswood
- Oxford Head Office, Alexandria
- Oxford Met Centre, Sydney
- Oxford North Sydney, North Sydney
- Oxford Sydney Airport Qantas T3, Mascot
- Oxford Sydney Airport T2, Mascot
- Oxford Sydney Central Plaza, Sydney
- Oxford Top Ryde, Ryde
- Oxy Wear, Campbelltown
- Oz Flavours Pty Ltd, Chester Hill
- Oz Future, Rosehill
- Oz Limo Hire Sydney - Chauffeured-Luxury Limousine-Stretch-Wedding Cars Hire Sydney, Guildford
- Oz Mobile Mechanics - Trucks & Cars Repair, Smithfield
- Oz Muscle Car Hire, Sydney
- Oz One Motors, Five Dock
- OzFlor Pty Ltd, Castle Hill
- Oztech Products, Hoxton Park
- Ozziland Children Wear, Parramatta