Bedrift O - Lørenskog
- Ohana
- Orntlimusikk ANS
- Ohana
- Orthecta AS
- Oioi AS
- Oculare AS
- Olavskilden
- Oterholt Holding AS
- Oslo Plumbing AS
- Otto Bilpark AS
- Olga Zujeva
- Oleksandr Valher
- Olena Slavita
- Opel Norge
- Opheim Petter
- Oressons Fordonsförmedling
- Oslo Skiltservice
- Otto Mobility AS
- Odd Arntzen
- Oslo Silketrykk AS
- Oioi Næring AS
- Oslo Vindtunelldrift AS
- Oioi Minihotell AS
- Olsen Espen
- Oktawiusz Szmatloch
- Olena Bunchuzhna
- Oppussings Kompis AS
- Oioi Grorudveien AS
- Onarheim Eiendom A/S
- Oslo Postorkester
- Oioi Eiendom AS
- Oioi Fritidseiendom AS
- Omer Leskovica
- Oliver Svendsen
- Olaad Taxi
- O2 Holding AS
- Osvik Torkamanipour
- Olaussen Konsult
- Origami Studios AS
- Oslo Malerareal AS
- Oslo Golfsimulator AS
- Os Transport AS
- Oslo Førerhundklubb
- Olele Htoo
- Omag Sunnevåg
- Olsen Management
- Olena Valentina
- Olena Koverha
- Outbound Grow Hamnvik
- Ofkir Bud Transport
- Ole-Kristian Andreassen
- Ole Bjørn Bøen
- O Smulan Multiservice
- Oslo Plumbing Holding AS
- Olsen Anders Wold
- OK Minilager Robsrud
- Oioi Odalsgata 47 AS
- Odd Enok Skramstad
- Oslo VIP Transporttjenester AS
- Oskar Karlsson Naprapati
- Oslo VIP Transporttjenester AS
- Olsens Cat Office
- Oslo Dining Club AS
- Oslo Elektro & Rør AS
- Oslo Transport Ali Akhtar
- Oslo Atomic Pro Center
- O.K. Andersen Byggautomasjon AS
- On Air Arild Eriksen
- Oldermannslauget i Lørenskog Friidrettslag
- Oslo College Of Managment DA
- Oldermannslauget i Lørenskog Friidrettslag
- Ore Ofe Olakayode Tunde
- Oslo Dance & Fitness Store ANS
- Ohana for Barn og Unge
- Ohana for Barn og Unge
- Ostadi & Sharifi Handel AS Konkursbo
- Ostadi & Sharifi Handel AS Konkursbo
- Osteopat og Mensendieckfysioterapeut Hilde Kristin Granheim
- Outspoken Images By Marie Warner Preston
- O.H. Olsen Veiledning og Familieterapi
- Ole-Andreas Holmsen Lo Go Pedi
- Oslo City Bygg Group V/ Bernhards Jansons
- Organization for Free Political Prisoners Of Iran / Ofppi
- Organization for Free Political Prisoners Of Iran / Ofppi