| Jojujo Invest AS | Professional & scientific | 2017 |
| Jomaso Holding AS | Financial services | 2017 |
| Jtconsulting AS | Professional & scientific | 2017 |
| Jura Produkter AS | Wholesale & retail | 2022 |
| Justdoit AS | Professional & scientific | 2015 |
| Jørve Holding AS | | 2024 |
| K Stormfelt Holding AS | | 2025 |
| K. Management AS | Professional & scientific | 2005 |
| K. Nessa Holding AS | | 2025 |
| K.B. Riste AS | | 2021 |
| Kaale-Holtskog AS | Professional & scientific | 2015 |
| Kalvøyafestivalen AS | Arts & recreation | 2021 |
| Kam Norway Holding AS | Professional & scientific | 2024 |
| Kapellveien 25 AS | Real estate | 2022 |
| Karean AS | Professional & scientific | 2005 |
| Karoline AS | Financial services | 1996 |
| Karras Holding AS | | 2025 |
| Kash AS | | 2023 |
| Katina AS | Real estate | 1985 |
| KC Ocean AS | Professional & scientific | 2012 |
| Kera AS | Financial services | 2005 |
| Keva Eiendom AS | Real estate | 2013 |
| Keyra AS | Professional & scientific | 2020 |
| KFM Investments AS | | 2020 |
| Kilco Invest AS | Financial services | 2016 |
| Kira Holding AS | | 2020 |
| Kittilsen Eiendom AS | Real estate | 2010 |
| Kjemikonsult Ans | Manufacturing | 2008 |
| Kjenner Stedet AS | Wholesale & retail | 2026 |
| Kjersti Invest AS | | 2021 |
| Klevsund AS | Real estate | 2005 |
| Klevsund Eiendom AS | | 2025 |
| Klmn Capital AS | Real estate | 2017 |
| Kloc AS | Construction | 2017 |
| KMS Invest AS | Wholesale & retail | 2005 |
| Komplett Peis AS | Wholesale & retail | 2022 |
| Kongshem Consulting AS | Professional & scientific | 2007 |
| Kontaktsalg Da | Wholesale & retail | 2011 |
| Kontera Regnskap AS | Professional & scientific | 2015 |
| Konvegens Invest AS | Real estate | 2008 |
| Krab AS | Professional & scientific | 2018 |
| Krantz Hansen AS | Professional & scientific | 2012 |
| Krekon AS | Professional & scientific | 2016 |
| Krismart Holding AS | | 2026 |
| Kritor Invest AS | | 2021 |
| Krogshavn-Invest AS | Professional & scientific | 2022 |
| Krohn Invest AS | Professional & scientific | 2019 |
| Ksgwear AS | Professional & scientific | 2024 |
| Kuldeforlaget AS | Information & communication | 2001 |
| Kullerud Bjørnestad AS | Wholesale & retail | 2022 |
| Kunstveggen AS | Information & communication | 2015 |
| Kvist KV AS | Professional & scientific | 2020 |
| Kystskolen AS | Education | 2024 |
| Kystskolen Digital AS | Information & communication | 2025 |
| La Casa Di Vino Ans | Wholesale & retail | 1996 |
| La Pinsa AS | Hospitality | 2021 |
| Lagergutta AS | Real estate | 2020 |
| Lancaster AS | Wholesale & retail | 2014 |
| Larner Design Ans | Wholesale & retail | 2000 |
| Lars Ove Haug Dental AS | Health & social care | 2024 |
| Lask AS | Professional & scientific | 2025 |
| Lauritzsen AS | | 2018 |
| Lawa Invest AS | Financial services | 2015 |
| Legendre Consulting AS | | 2023 |
| Lemape AS | Professional & scientific | 2017 |
| Lettlært AS | Education | 2025 |
| Levare AS | Professional & scientific | 2022 |
| Leven Holding AS | | 2020 |
| LHS Holding AS | Real estate | 2005 |
| Liba Capital AS | | 2021 |
| Lille My Familiebarnehage Bjerkelundsveien AS | Education | 2024 |
| Lillengveien 1 B AS | | 2026 |
| Linde Invest AS | | 2024 |
| Line H. Fielding AS | Professional & scientific | 2005 |
| Liom Holding AS | | 2024 |
| Liquiserve International AS | Real estate | 2005 |
| Live Landmark AS | Arts & recreation | 2012 |
| Ljungmann Eiendom AS | Financial services | 1974 |
| LJW Invest AS | | 2024 |
| Loader Trans AS | Transport & logistics | 2020 |
| Lob Holding AS | Wholesale & retail | 2007 |
| Loben AS | | 2016 |
| Louisa Bond AS | Arts & recreation | 2022 |
| Lsa Invest AS | Real estate | 2011 |
| Lsmj AS | Professional & scientific | 2021 |
| LTS Equi AS | Agriculture & fishing | 2026 |
| Lyngen Invest AS | | 2023 |
| M. Wist Holding AS | | 2022 |
| Maca Invest AS | Real estate | 2005 |
| Mactønnesen AS | Real estate | 2024 |
| Magenta Interiørarkitekter AS | Professional & scientific | 1999 |
| Magnolia AS | Professional & scientific | 2022 |
| Magnoliahelse AS | Health & social care | 2019 |
| Magnus Steine Holding AS | | 2020 |
| Mahrianne Investa AS | | 2019 |
| Makro Invest AS | Financial services | 2005 |
| Malerkjempen. No Ltd Nuf | Construction | 2005 |
| Malermester Brodahl AS | Construction | 2018 |
| Mamari Invest AS | Professional & scientific | 2012 |
| Mana Project AS | Construction | 2021 |