Firma O - Lysaker
- Osram AB
- Olavskvartalet AS
- Osram AB
- Osram AS
- Omny AS
- Odyssy AS
- Ortomedic AS
- Odontoclinica AS
- Oracle Belgia
- Oracle Svenska AB
- Oracle Deutschland Gmbh
- Oslo Oratoriekor
- Ocean Sun AS
- Olsen Eiendom AS
- Office Control AS
- Ourom Invest AS
- Ou-Samordningen
- Olga Reshetnyak
- Oslofjord Sparebank
- Obrebski Service
- Oxe Kapital AS
- Oma Vin AS
- Oslo Shipbrokers AS
- Oslo Oratoriekor
- Odin Konsult AS
- Oslo Service
- Ocean Operations AS
- Ou-Samordningen
- Olsen Mining
- Oslo Malerteknikk AS
- Org Geophysical AS
- Osm Spv AS
- Ocean Yield AS
- Oracle Norge AS
- Omny Holding AS
- Oscarsgate 44 AS
- Oppøyen Frisør
- Oxe Prosjekt AS
- Otterlei Sykepleie
- Odyssey Import ANS
- Oksenøystien Familiebarnehage
- Oscarsgate Butikktelefon
- Operation Team Platform
- Oracle Corporation Canada INC
- Oslo Airport Village AS
- Oceanteam Bourbon 101 AS
- Oceanteam Bourbon 4 AS
- Oslo Consulting Group
- Ocean Yield Advisors AS
- Orange Cyberdefense Norway AS
- Olsen Bernhard Holmeide
- Oslo Eiendoms Partner AS
- Old Kværner Invest AS
- Offshore Leasing i AS
- Ofa Farstad Konsult
- Ole Kvaal Irgens
- Olsen Energy Consultancy
- On Food Norway AS
- Oracle Emea Limited
- OCH Ortopedi Lysaker
- Oris Dental Lysaker
- Ortho-Clinical Diagnostics Norway
- Oslo Fashion House Leietagerforening
- Omega 365 Solutions AS Avd Lysaker
- Oracle Global Services Norway AS
- Oksenøya Dagligvare Inderjit Singh
- Oslo Brannvern og Sikring ANS
- Oracle Financial Services Software Limited
- Oslo Hotell- og Restaurantforenings Pensjonistforening
- Oslofjorden Handelshus - K B Henriksen
- Oracle Slovensko Spol S.R.O.