Bedrift O - Nordstrand
- Optimert AS
- Otco AS
- Office4u AS
- Omsorgsteam AS
- Oppdater AS
- Oma AS
- Organica AS
- Orthobache AS
- Orv60b AS
- Or64
- Or64
- Overbird AS
- Omnipro AS
- Onetwo3 AS
- Orkesterkollektivet
- Orto AS
- October Atelier
- Omar Sanad
- Ole Brørby
- Oma Ohnstad
- October Atelier
- Oscar Kalsnes
- Oliver Bellefine
- Onco Consulting AS
- Oleksandr Sheptukha
- Opa Holding AS
- Oda Lyngås
- Oda Invest AS
- Omano Invest AS
- Ottar Julsrud
- Ola Dønnem
- Oslo Pensjonistparti
- Orange Gaming AS
- Osloby Taxi AS
- Oslo Anleggsgartner AS
- Oslos Skøytevenner
- Oppegård Seilforening
- Oslo Møbelsnekkeri AS
- Oslo Byggservice AS
- Oddvar Ystgaard
- Oberst Elektro AS
- Oslohus Utvikling AS
- Oslohus Drift AS
- Oslo Liftbil AS
- Oban Invest AS
- Origo Invest AS
- Obersten Invest AS
- Ocl Holding AS
- Oslohus Eiendom AS
- Obersten Barnehage
- Olberg Transport AS
- Opptur Helse
- Oslo Accounting AS
- One1 Aanerud
- Oslo Rådgivning AS
- Ola Akselberg
- Oslo Guideforening
- One Team AS
- Oslo Guideforening
- Outline Ventures AS
- Okv Investments AS
- Ohoh Holding AS
- Onedev Solutions AS
- Oban Holding AS
- Otc Invest AS
- Ond Spiral AS
- Ovis Invest AS
- Oda Tonstad Productions
- Oslo Pin Club
- Onenomads Laska Marosi
- Oslo Pin Club
- Ottar Langseth Regnskap
- Oslo Malerservice Oleinik
- Olav Ramstad Thelle
- Optimal Klinikk Nordstrand
- Ole-Andre Skotte
- Oslo vest Transport AS
- Oslo gate 39 AS
- Oslo Akershus Brytekrets
- Oda Loui Østbakk
- Ole C. Loftesnes
- Oslo Soul Children
- Ole Brumm Familiebarnehage
- Ordholderiet Yngvild Sørbye
- Ola Nordsletten Transport
- Ola Dale Consulting
- Once In Oslo AS
- Oslo Nøytrale Byråvakt
- Oh So Oslo AS
- Offshore Media Group AS
- Olav Kyrre Eiendom AS
- Olsenfix Bjørn Roksvold
- O Sole Solutions
- Oslo og Omegn Sjakkrets
- Optimal Kompetanse og Karriere
- Oftedal og Skrehelle Konsulting
- Overå Fysioterapi, Manuellterapi, Akupunktur
- Oslo Irish Set Dancers
- Olsen Andreas August Gran
- Ocht Kim André Hagen
- Oberst Rodesvei 82b-E
- Oberst Rodesvei 82b-E
- Oda Neoma Granath-Magelssen
- Orød Rådgivning Tor Øvrebø AS
- Oslo Bygg og Eiendom AS
- Oppsal Senter Boliggruppe D3 SA
- On the Fritz IT Consulting AS
- Ole Moes vei 5 Sameie
- Ole Moes vei 5 Sameie
- Oslomental.no Ingvild Høimyr Holm
- Operasjonssykepleier Ida Ygemar Jæger-Eriksen
- Oslo Bygg og Eiendom, Eiendom AS
- Oberst Rodes vei 60 A-D
- Oberst Rodes vei 60 A-D