Bedrift O - Askim
- Omar AS
- Obnatus AS
- Optocom AS
- Olsen & Co
- Olsen&Co AS
- Omtvedt AS
- Opsduty AS
- Onegolf AS
- Olsen Roger
- Ola Nordmann AS
- Opås Copy
- Olsen Runar
- Okshovd Invest AS
- Orkide Restaurant AS
- Orkide Restaurant AS
- Olsen Productions
- Onetraffic Norway AS
- Oslo Arbeidsangerforbund
- Orkide Restaurant AS
- Olav Moen
- Ola Brevig
- Ole Holtan
- Olaf Lund
- Oraug gård
- Osloveien 91 AS
- Omras VVS
- Osloveien 214 AS
- Orderud Consulting
- O2ii AS Konkursbo
- O2ii AS Konkursbo
- Online Accounting AS
- Osloveien 214 AS
- Odontia 3 AS
- Osloveien Bil AS
- Opus Management AS
- Oppegård Event
- Olsen Legevakt
- Olsen Varetransport
- Oddbjørn Bolstad
- Ole Martin Dæhli
- Ole Johan Aarsrud
- Oliviano Pemahealth Nordic
- Ole Freddy Hogstad
- Onepc Ashif Dossa
- On Track Consult AS
- Olsen 3D Fiks
- Ole Ha Holding AS
- Ole Thorstein Løken
- Ole Arne Frøshaug
- Odd Joar Nygaard
- Ole Magnus Lillestrand
- Ole Thorvald Lillestrand
- Ole Hjalmar Kopperud
- Otten Økologisk Birøkt
- Ola Frøshaug Holding AS
- Odd Steinar Svendsen
- Odd Øivind Juel
- Oraug Kylling-oppdrett
- Osteopat Emilie Sørlie
- Ole Andreas Gundersen
- Osloveien 33 Eiendom AS
- Outlet Super Bilvask AS
- Ole Bent Bjørnøy
- Othman Azima Jelli
- Oscar Stein Bjelke Landskapsarbeid
- Overland Inka / Sindy
- Osb Transport og Tjenester AS
- Osteopat Marlén Torp Lilleng
- Oppfølgingstjenesten (OT) Avd. indre Østfold
- Open Air Campaigners Norge
- Open Air Campaigners Norge
- Ord og Bilder Rigmor og Øivind Berge