OM Financial Ltd
- Level 2, 187 Broadway, Newmarket, Auckland
Oranga School
- 21 Rangipawa Road, One Tree Hill, Auckland
Omnicron Productions Ltd
- Top Floor, 10 Galatos Street, Newton, Auckland
Orion Health Ltd
- Orion House, 181 Grafton Road, Grafton, Auckland 1010
Orlando Private Florist
- Ground Floor, George Courts Building, 238 Karangahape Road, Auckland
Vodafone Events Centre
- 770 Great South Road, Manukau City
Osbournes Ltd
- 117 Mays Road, Onehunga, Auckland
Oteha Valley School
- Medallion Drive, Albany, North Shore
Otis Elevator Company Ltd
- 3 Fisher Crescent, Mt Wellington, Auckland
Out West Western Saddlery
- Unit A1 Waimauku Village, 5-15 Factory Road, Waimauku, Auckland