Bedrift J - Sørum
- Johal
- Jdev AS
- Julton
- Janda
- Jorun Hovind
- Jørgen Sletholen AS
- Johan Lystad
- John Ivar Sæther
- Jørn Atle Bingen
- Julia Stegen Hagen
- Joar Hylland Mikkelsen
- JS-Elektro Syktus
- Jutta Mikkola MK
- Jan Arild Moe
- Johansen Bjørn Runar
- Jon Arne Eid
- Jo Henning Stenby
- Jon Arve Rognerud
- John Arne Opsahl
- Janson & Langerud AS