On The Point Lake Rotorua
- 214 Kawaha Point Road, Rotorua
Oranga School
- 21 Rangipawa Road, One Tree Hill, Auckland
Onyx Group Ltd
- 17 The Concourse, Henderson, Auckland
Orange Productions – Exceptional Events Management & Design
- 6 Henderson Place Onehunga
Open Cloud Ltd
- Level 4, 54-56 Cambridge Terrace, Wellington
ORB Communications Ltd
- Level 1, 214 Karangahape Road, Auckland
OM Financial Ltd
- Level 2, 187 Broadway, Newmarket, Auckland
Flannery Lodge
- Ophir
Orcon Internet Limited
- 28 The Warehouse Way, Northcote, North Shore
Omnicron Productions Ltd
- Top Floor, 10 Galatos Street, Newton, Auckland