Bedrift O - Kongsvinger
- Olaskogen AS
- Optice AS
- Orblytic AS
- Optiversion AS
- Ovlien & Co. AS
- Oddbjørn Torkildsrud
- Olsson Håndtverkertjenester
- Odal Trafikkskole AS
- Optimum Helse AS
- Or Eiendom AS
- Ole Lunder
- Orjada Halili
- Otervegen 14 AS
- Offline Trening AS
- Or Invest AS
- Ok Service AS
- OP Maskin AS
- One Reklame DA
- Oddvar Koffeld
- Otel Eiendom AS
- Ombj Invest AS
- Olena Vedmedenko
- O&C Bendixen
- Oleh Stienkin
- Oddvar Dammen
- Oleksandr Khmarin
- Omsaso Holding AS
- Ocka Eiendom AS
- Olsson Consulting
- Olav Mellem
- Odd Steinar Nordstrand
- Olle-Morten Lund
- Odd Inge Hagerud
- Oddvar Sverre Digerud
- Orada Johnsen Thaimat
- Odd Arne Vårli
- Ove Asbjørn Åslie
- Olav Berg Engelsrud
- Oddveig Torp Dahl
- Odd Kristian Aasum
- Oustad Holth Eiendom AS
- Op Maskin Eiendom AS
- Op Maskin Holding AS
- Oustad Holth Prosjektering AS
- Oberst Krebsgt Borettslag
- Ole Aksel Grønnerud
- Ole Anders Nygaard
- Odd Ingar Aanerud
- Oe Sand Service
- Ole Martin Bjerke
- Oberst Krebsgt Borettslag
- Olaug Anni Grønnerud
- Ole Gunnar Mellem
- Odal Bil Kongsvinger AS
- Ole Gunnar Mellem
- Odal Sparebank Kongsvinger
- Odal Bil Kongsvinger AS
- Ovlien & Sønn ANS
- Ole Anton Næss
- Oslo Universitetssykehus HF Ambulansetjenester Kongsvinger
- Odd Fellow Seniorklubb Kongsvinger
- Ordavind Christin Castberg Bråthen
- Oslo Handel og Vandel AS
- Olaug Jenny Blandina Osuldsen
- O Kristoffersen Bingodrift AS Kil Bingo
- Overud gård Carl Axel Løvenskiold
- Oslo & Viken Transport AS Konkursbo
- Oslo & Viken Transport AS Konkursbo
- Odds Dokumenthjelp Odd Ingar Lilleberg
- Odd Fellow Loge 122 Gyldenborg
- Oslo og østre Viken Jordskifterett Kongsvinger
- Oneco Networks AS Distrikt indre Østland Kongsvinger
- Odd Fellow Leir Nr 25 Glomma
- Ortodoks Kirke Debre Selam Kdus Michael Kongsvinger og Omegn