| JFP Invest V AS | | 2026 |
| JFP Invest Vi AS | | 2026 |
| JFP IV AS | | 2024 |
| JFP Real Estate AS | | 2026 |
| JFR Holding AS | | 2026 |
| JG Capital AS | Real estate | 2005 |
| JG Consulting AS | Professional & scientific | 2023 |
| JG Finance AS | | 2024 |
| JG Super AS | | 2023 |
| JGB Eiendom AS | Real estate | 2008 |
| JGB Management AS | Financial services | 2006 |
| JGC Invest AS | | 2026 |
| JGF Holding AS | | 2021 |
| JGH AS | | 2025 |
| JGH Investments AS | | 2024 |
| JGK AS | Real estate | 2022 |
| JGL Invest AS | | 2014 |
| JGL Service AS | Other services | 2020 |
| JGP Holding AS | Real estate | 2011 |
| JGR Holding AS | Financial services | 2005 |
| Jgruppen AB | Manufacturing | 2009 |
| Jgti Holding AS | | 2018 |
| JGV Eiendom AS | Real estate | 2007 |
| JH Capital AS | | 2024 |
| JH Consulting AS | Professional & scientific | 2023 |
| JH Forvalter AS | Real estate | 2007 |
| JH Jahren 2 AS | | 2026 |
| JH Jahren AS | | 2023 |
| JHB Filtbygg AS | | 2021 |
| Jhet Holding AS | | 2022 |
| JHG AS | | 2026 |
| JHH Capital AS | | 2020 |
| JHH Holding AS | Agriculture & fishing | 2007 |
| JHH Invest AS | | 2021 |
| JHJ Shipping AS | | 2023 |
| JHK Invest AS | Real estate | 2005 |
| JHK Vogtsgate 50 Ans | Real estate | 2012 |
| JHL Invest AS | | 2005 |
| Jhon Møbler AS | Wholesale & retail | 2008 |
| Jhts Fremtid AS | | 2020 |
| Jhu Walden Holding AS | | 2025 |
| JHV10 Invest AS | Professional & scientific | 2001 |
| Jhy AS | | 2024 |
| Ji Invest AS | | 2021 |
| Jia AS | Hospitality | 2015 |
| Jib Eiendom AS | Real estate | 2000 |
| Jib Invest AS | | 2021 |
| Jibb Kommunikasjon AS | Professional & scientific | 2023 |
| Jibbi Holding AS | Information & communication | 2026 |
| Jif Invest AS | Real estate | 2012 |
| Jig Holding AS | Information & communication | 2014 |
| Jigemark & Bygg AB | Construction | 2006 |
| Jigsaw Bidco AS | Information & communication | 2019 |
| Jigsaw Holdco 1 AS | Information & communication | 2019 |
| Jigsaw Holdco 2 AS | Information & communication | 2019 |
| Jigsaw Topco AS | Information & communication | 2019 |
| Jih Invest AS | | 2019 |
| Jih-Holding AS | Arts & recreation | 2010 |
| Jim Invest AS | Financial services | 2007 |
| Jim Rickey AS | Wholesale & retail | 2020 |
| Jim's Lagerutsalg AS | Wholesale & retail | 2005 |
| Jima AS | Real estate | 2021 |
| Jimco Nor AS | Professional & scientific | 2004 |
| Jimm Invest AS | Real estate | 2005 |
| Jims Salg AS | Wholesale & retail | 2024 |
| Jin-Invest AS | Real estate | 2005 |
| Jinyuan AS | Hospitality | 2012 |
| Jippi Forlag AS | Information & communication | 2017 |
| Jippifilm AS | Information & communication | 2016 |
| Jippiodden AS | Health & social care | 2005 |
| Jira Holding AS | Real estate | 2005 |
| Jisco Alumina Norway AS | Manufacturing | 1988 |
| Jisp Norway AS | Professional & scientific | 2019 |
| Jit AS | | 2016 |
| Jiten Invest AS | Information & communication | 2022 |
| Jiu-Jitsu Collective AS | Arts & recreation | 2025 |
| Jiw AS | Information & communication | 2014 |
| Jiyu AS | | 2026 |
| JJ & Oj Company AS | | 2019 |
| JJ Innovation AS | Professional & scientific | 2019 |
| JJ Kommunikasjon AS | Professional & scientific | 2022 |
| Jj-Liberty AS | Financial services | 2007 |
| JJB AS | Wholesale & retail | 2014 |
| JJB Holding AS | Wholesale & retail | 2014 |
| JJD Invest AS | | 2026 |
| JJH AS | | 2026 |
| JJH Invest AS | Financial services | 2005 |
| JJH Invest Holding AS | Financial services | 2015 |
| JJP Holding AS | Information & communication | 2020 |
| JJR AS | | 2005 |
| Jjsa Holding AS | | 2016 |
| Jjtj Holding AS | | 2026 |
| JK Byggentreprenør AS | Construction | 2020 |
| JK Capital AS | Real estate | 2016 |
| JK Entreprenør AS | Construction | 2020 |
| JK Entreprenørservice AS | Construction | 2012 |
| JK Hawken AS | Administrative & support | 2026 |
| JK Jahren AS | | 2026 |
| JK Multiservice AS | Administrative & support | 2024 |
| JK Transport Oslo AS | Transport & logistics | 2025 |