Bedrift J - Longyearbyen
- Just4fun AS
- Jorkjend AS
- Jokavi AS
- Jonassen Consulting
- Jens Abild
- Jan Brunner
- John Garvik
- John Inge Karlsen
- Jannicke Jane Mikkelsen
- Jasper de Wandeler
- Jm Hansen AS Maritim
- Johannes M. Lipphardt - Sivilarkitekt
- Joeane Dela Cruz Abarquez
- Jenssen André Glass og Fasade
- J. E. Lockert Holding og Eiendom AS