Bedrift J - Rolvsøy
- Jyb AS
- Jaa AS
- Johansson Ivan
- Juvelen Østfoldhallen
- Johansen Omsorg
- Jobo Tepper AS
- Je Holding AS
- Jernia Østfoldhallene
- Jysk Fredrikstad
- Jula Fredrikstad
- Josephine Mwando
- Jct Kolseth
- Johansen Østers
- Jon Neerland
- Jensen Johnny
- Josof Transport
- Jlj Holding AS
- Jørgensen Ragnar
- Johansen Energi AS
- Jack & Jones
- Jan-Freddy Pedersen AS
- John Johansen Holding AS
- Juel Johansens Bilruter ANS
- Janne Stene Music
- Janne Merete Stene
- Johansen Åge Tormod
- Jesus er Herre
- Joma Trading Norway AS
- Jensen City Lyd
- Jens Tore Veum
- Jon Arne Fosby
- Johansen Jan Erik
- Jonna Nordvind Birkefeld
- Jernbanevakt og Elsikkerhet AS
- John Ian World Collection AS
- Jem & Fix Fredrikstad
- Johnsen - Consult And Engineering
- Jan Auto Jelal Ali
- Jon Morten Halvorsen Invest AS
- Jacobs Trading Maamar Kafi Djelloul
- Jan-Freddy Pedersen Eiendom og Utleie AS
- Jensen Troll Møbler & Troll Design