| Jø Og Fyse Investors AS | Financial services | 2007 |
| Jødahl Holding AS | | 2026 |
| Jødahl Og Hansen Invest AS | Real estate | 2025 |
| Jøg Invest AS | Financial services | 2007 |
| Jølle Eiendom AS | Real estate | 2025 |
| Jølsen Eiendom 1 AS | Real estate | 2020 |
| Jølsen Eiendom 4 AS | Real estate | 2021 |
| Jølstad Begravelsesbyrå AS | Other services | 2001 |
| Jølstad Gravstein AS | Manufacturing | 1992 |
| Jønbu AS | Financial services | 2005 |
| Jøndal & Hoff AS | Manufacturing | 1971 |
| Jønk Colosseum AS | Hospitality | 2022 |
| Jønk Drift Norge AS | Hospitality | 2024 |
| Jønk Fredensborg AS | Hospitality | 2022 |
| Jønk Frysja AS | Hospitality | 2022 |
| Jønk Grorud AS | Hospitality | 2024 |
| Jønk Grønland AS | Hospitality | 2020 |
| Jønk Holmlia AS | Hospitality | 2022 |
| Jønk Invest AS | Wholesale & retail | 2021 |
| Jønk Mortensrud AS. | Hospitality | 2023 |
| Jønk Roatorg AS | Hospitality | 2020 |
| Jønnbu Invest AS | Arts & recreation | 2005 |
| Jøraandstad Consulting AS | Education | 2013 |
| Jøraandstad Holding AS | | 2024 |
| Jøran Invests AS | | 2020 |
| Jøran Tangen Holding AS | | 2026 |
| Jørestrandsveien Vann Og Avløps Vel SA | Water & waste | 2010 |
| Jørgbu Holding AS | Professional & scientific | 2022 |
| Jørgen Brannstorph AS | Professional & scientific | 2010 |
| Jørgen Gvein AS | Professional & scientific | 1998 |
| Jørgen Holmseth AS | | 2019 |
| Jørgen Lervik AS | Construction | 2022 |
| Jørgen Lund Karlsen Holding AS | | 2020 |
| Jørgen Malo Holding AS | | 2023 |
| Jørgen Rasmussen Gruppen Norge AS | Water & waste | 2013 |
| Jørgen Skjennum Holding AS | | 2025 |
| Jørgen Thorp Invest AS | | 2021 |
| Jørgenrud Holding AS | Real estate | 2023 |
| Jørgensen AS | Construction | 2023 |
| Jørgensen Capital AS | Real estate | 2000 |
| Jørn Are Vigestad Berge AS | | 2023 |
| Jørn Gulbrandsen AS | Real estate | 1983 |
| Jørn Gærli Holding AS | Professional & scientific | 2020 |
| Jørn Hetland Holding AS | | 2020 |
| Jørn Holding AS | | 2013 |
| Jørn Juliussen AS | Professional & scientific | 2007 |
| Jørn Madsen AS | Wholesale & retail | 2011 |
| Jørn Ola Birkeland Holding AS | | 2026 |
| Jørn's Bil Og Brems AS | Other services | 2011 |
| Jørst Holding AS | Real estate | 2016 |
| Jørst Invest AS | | 2005 |
| Jørstad Invest AS | Financial services | 2007 |
| Jøsok Invest AS | | 2022 |
| Jøss Bokstudio AS | Professional & scientific | 2015 |
| Jøsyra Invest AS | Real estate | 2005 |
| Jørgen Sørensen & Co. A/S | Wholesale & retail | 1987 |
| K a Mero AS | Real estate | 1984 |
| K Ask Holding AS | | 2020 |
| K Bech Holding AS | | 2022 |
| K Bue AS | Construction | 1992 |
| K Capital AS | | 2023 |
| K Capital Group AS | Administrative & support | 2020 |
| K Consult AS | Professional & scientific | 2012 |
| K D S Holding AS | Financial services | 2005 |
| K Design AS | Wholesale & retail | 2013 |
| K Entreprenør AS | Real estate | 2025 |
| K Estate AS | Real estate | 2017 |
| K F L Holding AS | Real estate | 2005 |
| K Group AS | Information & communication | 2019 |
| K H Montasje Service AS | Construction | 2018 |
| K Holdings AS | | 2024 |
| K Hvide Invest AS | | 2020 |
| K Invest AS | Financial services | 2018 |
| K Kristiansen Holding AS | | 2019 |
| K Moen Automatikk AS | Wholesale & retail | 1991 |
| K O Schea AS | Professional & scientific | 2014 |
| K Og K AS | Professional & scientific | 2002 |
| K Pluss D AS | Professional & scientific | 2012 |
| K Reinertsen AS | Professional & scientific | 2017 |
| K S Bakken AS | Information & communication | 2024 |
| K Security AS | Administrative & support | 2023 |
| K Seel Consulting AS | Wholesale & retail | 2010 |
| K Style AS | Professional & scientific | 2019 |
| K Tonga Holding AS | Real estate | 2012 |
| K Tre AS | Real estate | 1956 |
| K Tre Holding AS | Real estate | 2021 |
| K V Agency AS | Wholesale & retail | 2017 |
| K V Konstruksjon AS | Construction | 2016 |
| K&B Invest AS | Real estate | 2007 |
| K&K Family AS | Real estate | 2016 |
| K&M Consulting AS | Professional & scientific | 2021 |
| K&M Eiendom Da | Real estate | 2015 |
| K&M Holding AS | Arts & recreation | 2018 |
| K&P Gruppen AS | Real estate | 2019 |
| K&P Transport AS | Transport & logistics | 2025 |
| K&Sk AS | Professional & scientific | 2018 |
| K-A Invest AS | Construction | 2018 |
| K-A Knive Holding AS | | 2020 |
| K-B Gruppen Norway AS | Hospitality | 2024 |
| K-Beauty Norge AS | Wholesale & retail | 2022 |