Bedrift O - Lørenskog
- Orntlimusikk ANS
- Orthecta AS
- Oioi AS
- Olavskilden
- Olga Zujeva
- Oressons Fordonsförmedling
- Oslo Skiltservice
- Opheim Petter
- Oleksandr Valher
- Omfa Invest AS
- Oterholt Holding AS
- Otto Bilpark AS
- Oldenburger Norge AS
- Opel Norge
- Otto Mobility AS
- Oslo Plumbing AS
- Olgert Sekaj
- Odd Arntzen
- Oslo Postorkester
- Oktawiusz Szmatloch
- Onarheim Eiendom A/S
- Olsen Espen
- Oslo Silketrykk AS
- Oppussings Kompis AS
- Olena Bunchuzhna
- Oioi Fritidseiendom AS
- Oioi Næring AS
- Oioi Grorudveien AS
- Oioi Minihotell AS
- Oioi Eiendom AS
- Oslo Kjøleservice AS
- Oslo Vindtunelldrift AS
- Omar Taxi
- Olaad Taxi
- Olaussen Konsult
- Osvik Torkamanipour
- Omer Leskovica
- Os Transport AS
- O2 Holding AS
- Ovt Gruppen AS
- Origami Studios AS
- Oslo Golfsimulator AS
- Oliver Svendsen
- Oslo Førerhundklubb
- Olele Htoo
- Olsen Management
- Omag Sunnevåg
- Olena Koverha
- Ole Bjørn Bøen
- Oslo Plumbing Holding AS
- Odd Enok Skramstad
- Oioi Odalsgata 47 AS
- OK Minilager Robsrud
- Oskar Karlsson Naprapati
- Ole Jørgen Danbolt
- Olsens Cat Office
- Oslo VIP Transporttjenester AS
- Oslo Elektro & Rør AS
- Oslo Transport Ali Akhtar
- Oslo Membran Tech Sulcs
- Oslo Atomic Pro Center
- O.K. Andersen Byggautomasjon AS
- Oppusing Mester Arunas Girskis
- Oslo VIP Transporttjenester AS Konkursbo
- Oslo VIP Transporttjenester AS Konkursbo
- Oslo College Of Managment DA
- Oldermannslauget i Lørenskog Friidrettslag
- Oldermannslauget i Lørenskog Friidrettslag
- On Air Arild Eriksen
- Oslo og Viken Turbusser AS
- Oslo Rørlegger & Entreprenørbedrift AS
- Ore Ofe Olakayode Tunde
- Oslo Dance & Fitness Store ANS
- Oles Malerservice Ole Tommy Sand
- Osteopat og Mensendieckfysioterapeut Hilde Kristin Granheim
- O.H. Olsen Veiledning og Familieterapi
- O.H. Olsen Veiledning og Familieterapi
- Oslo City Bygg Group V/ Bernhards Jansons
- Organization for Free Political Prisoners Of Iran / Ofppi
- Organization for Free Political Prisoners Of Iran / Ofppi