Bedrift O - Arendal
- Osm AS
- Overhuset AS
- Osolo AS
- Ormeviga AS
- Oveland Forlag
- Opheim Walther
- Omdalsmoen Honning AS
- Osedalstunet Eierseksjonssameie
- Ole Møster
- Osedalstunet Eierseksjonssameie
- Osm Norway AS
- OK Bingo
- Oveland Eiendom AS
- Osm Maritime AS
- Oak Agency AS
- Osm Offshore AS
- Oleh Doroshev
- Offshore Kinetics AS
- Okris Kristoffersen
- Ormevika Velforening
- Oleksandz Shendzyk
- Oleksandr Kiselov
- O&M Group AS
- Osm Norway AS
- Olweus Group AS
- Otterlei Industries AS
- Oneco Infra AS
- Otterlei Group AS
- Orapin Frigstad
- Onyx Real AS
- Otrum AS Avd Arendal
- Oksana Raliuk
- Ottar Tveit
- Origo Solutions AS
- Olav Stormo AS
- Olena Malteseva
- Ofp Produkt AS
- Otto Eliassen AS
- Oldemor Karen AS
- Oslo Båtutstyr AS
- Oris Dental AS
- Obs Arendal
- Odd Hesthag
- Ottersland Magne
- Ole Skjævestad
- Olimstad Knut
- Olaf Brovoll
- Olav Austenå
- Odd Hesthag
- Olav Lillevåje
- Olimstad Holding AS
- Odd Einar Jørundland
- Osm Aviation Airtech AS
- O. G. Ottersland AS
- Oscars gate 52 AS
- Osm Maritime Group AS
- Oris Dental Arendal
- Osm Maritime Crew Ltd
- Osm Maritime Crew Ltd
- Osm Marine Crew AS
- Osm Aviation Academy
- Operasjon Risvik-Solstad
- Odd Lundes Psykiaterpraksis
- Ove A. Frigstad
- Oralkirurg Ove Busch AS
- Olaisens Vedomsetning Dødsbo
- Oti ledig 1 AS
- Onkel Arnebergs Arkitekturpraksis
- Orapin Thai Massasje
- Olsen Bjørn Thomas
- Ole David Espeland
- Odd Olav Ramse
- Oustad Dan Fredrik
- Oddrun Gjeruldsen Healing
- Olav Ager-Wick AS
- Origo Solutions AS Avd Arendal
- Onninen AS Avd Proffmarked Arendal
- Ole Petter Holmestrand
- Obs Arendal Avd Kafeteria
- Optimera Proffsenter Arendal
- Onninen Express Arendal
- Omar Achour Puntervold
- Oris Dental Stoa
- Optimera Proffsenter Arendal
- Ole P Bjornes
- Ole Helge Holtebekk
- Osm Crew Management Ltd
- Osm Maritime Group Ltd
- Osm Ship Management Cyprus Ltd
- Osm Ship Management Cyprus Ltd
- Oj Aspen Technologies International
- Oj Aspen Marketing International
- O.G.Ottersland Drift AS
- Offshore & Heavylift Services AS
- Osm Aviation Academy Holding AS
- Osm Ship Management B AS
- Osm Marine Crew 7 AS
- Osm Marine Crew 8 AS
- Osm Marine Crew 6 AS
- Osm Marine Crew 5 AS
- Osm Marine Crew 2 AS
- Osm Marine Crew 3 AS
- Osm Marine Crew 4 AS
- Oil & Gas Management AS
- Ortoped Sigurd Liavaag Phd
- Operasjonssykepleier Reidar Hvidsten Lilleholt
- Oleksiak Sales & Invest
- Oddenveien Vel 32 C
- Omholts Mediatjenester Geir Omholt
- Oneco Networks Agder Bedriftsidrettslag
- Opel-Registeret Avdeling Sørlandet
- Opel-Registeret Avdeling Sørlandet
- Opplæringskontoret for Bilfagene i Agder
- Osm Aviation Academy Pilot Union
- Osm Aviation Academy Pilot Union
- Odd Fellow Loge 135 Mærdø
- Osa Publish V/Heidi Osa Syvertsen
- Old Savage Riders MC Arendal
- Oneco Networks AS Distrikt Sørvest Arendal
- Odd Fellow Loge Nr 107 Torungen
- Odd Fellow Loge Nr 107 Torungen
- Osvald Peder de Almeida Johansen Konkursbo
- Osvald Peder de Almeida Johansen Konkursbo
- Opplæringskontoret for Offentlig Sektor i Agder
- Opplæringskontoret for Byggfagene i Aust-Agder
- Odd Fellow Loge Nr. 61 Terje Vigen
- Odd Fellow Leir Nr. 22 Aust-Agder
- Opplæringskontoret for Mat og Servicefag Agder Avd. Arendal
- Ole Dahl og Hustru Anna F Arntsens Legat
- Opplæringskontoret for Salg-, Service- og Kjøttfagene i Agder
- Opplæringskontoret for Offentlig Sektor i Agder (Okos Agder)