| KAM25 AS | Real estate | 2018 |
| Kar Digital Limited Nuf | Mining & quarrying | 2026 |
| Karianne L Holding AS | | 2022 |
| Ke Forvaltning AS | | 2022 |
| Kenneth Geir Kallesten AS | Real estate | 2004 |
| Kiat AS | Information & communication | 2023 |
| Kintsugi Mo Da | Professional & scientific | 2022 |
| Kjetil Knutsen Holding AS | | 2024 |
| Kleppveien 611 AS | Real estate | 2007 |
| Klinikk Optimal Tananger AS | Health & social care | 2012 |
| Klinikk Optimal Treningssenter AS | Arts & recreation | 2018 |
| Klinikk Remme AS | Health & social care | 2026 |
| KMV AS | | 2021 |
| Knøtteinvesteringer AS | | 2024 |
| Koldby Holding AS | | 2022 |
| Kontinentalveien 24 AS | Real estate | 2011 |
| Kove Kompetanse AS | Professional & scientific | 2024 |
| Kral Communications AS | Information & communication | 2001 |
| Kreativ Eiendom AS | Real estate | 1997 |
| Ksy Holding AS | Real estate | 2008 |
| Kvalitet I Allmennpraksis AS | Professional & scientific | 2017 |
| Landmark Eame Ltd | Administrative & support | 1995 |
| Landmark Graphics AS | Information & communication | 1994 |
| Landor Larsen Holding AS | Professional & scientific | 2019 |
| Lars Husdal Holding AS | | 2022 |
| Lauvås Vann Og Avløp AS | Water & waste | 2017 |
| Lee.C.Nc Limited | Professional & scientific | 2019 |
| Leian AS | Construction | 2013 |
| Lepus AS | Professional & scientific | 1993 |
| Liartsi Holding AS | Real estate | 2023 |
| Liftutleie Tananger AS | Administrative & support | 2000 |
| Lima Byggservice AS | Construction | 2020 |
| Liroco Invest AS | | 2005 |
| LIROCO Lie og Roth ANS | Wholesale & retail | 1986 |
| Litla Sandvigå AS | | 2006 |
| Live More AS | | 2025 |
| Llander AS | Information & communication | 2024 |
| LMC Machining Limited Nuf | Professional & scientific | 2024 |
| Lo Design AS | Professional & scientific | 2026 |
| Log Accounting AS | Professional & scientific | 2024 |
| Log Capital AS | | 2026 |
| Log Consulting AS | Professional & scientific | 2022 |
| Log Finance Holding AS | Professional & scientific | 2022 |
| Log Holding AS | Construction | 2018 |
| Log Montasje AS | Construction | 2023 |
| Logi Trans AS | Transport & logistics | 2001 |
| Logi Trans Group AS | Transport & logistics | 2005 |
| Logi Trans Storebotn AS | Real estate | 2022 |
| Logi Trans Terminal AS | Transport & logistics | 2006 |
| Logos Invest AS | Financial services | 2006 |
| Los Holding AS | Financial services | 2005 |
| Lotte Og Daniel AS | Real estate | 2017 |
| Luramyrveien 25 AS | Real estate | 2022 |
| Luramyrveien 29 AS | Real estate | 2006 |
| Lyngveien 15B AS | Real estate | 2025 |
| M-Reel AS | Professional & scientific | 2023 |
| Maksi Terminalen AS | Real estate | 2023 |
| Malik Holdings AS | | 2020 |
| Marc.J.M Limited Nuf | Mining & quarrying | 2024 |
| Marine Power House AS | Professional & scientific | 2026 |
| Marlog to AS | Transport & logistics | 2024 |
| Mastiff One AS | Wholesale & retail | 2018 |
| Matinee Ans | Arts & recreation | 1997 |
| Maxi Fast Food AS | Hospitality | 2008 |
| Mays Holding AS | Real estate | 2006 |
| MB Eiendomsinvest AS | Real estate | 2024 |
| Mco AS | | 2024 |
| Mdco AS | Health & social care | 1990 |
| Mechocean Engineering Solutions AS | Professional & scientific | 2016 |
| Mediadrone AS | Professional & scientific | 2012 |
| Mej Capital AS | | 2023 |
| Mellemstrand Salgspartner AS | Professional & scientific | 2024 |
| Mento AS | Wholesale & retail | 1998 |
| Mento Holding AS | Real estate | 1975 |
| Mento Investering AS | Real estate | 2012 |
| Mento Rental AS | Administrative & support | 1993 |
| Microa AS | Manufacturing | 2007 |
| Microa Bioactives AS | Professional & scientific | 2022 |
| Microa Biopolymer AS | Manufacturing | 2016 |
| Midd AS | Professional & scientific | 2025 |
| Milima AS | | 2022 |
| Mineralis AS | | 2024 |
| Minilin AS | Wholesale & retail | 2015 |
| Mito Holding AS | Professional & scientific | 2025 |
| Mitomed AS | Professional & scientific | 2019 |
| Mkab Invest AS | | 2026 |
| MTN Norway Operations AS | Wholesale & retail | 1999 |
| Myklebust Butikkeiendom AS | Real estate | 2017 |
| Måkse AS | Financial services | 2016 |
| Navalarsen AS | Information & communication | 2019 |
| Navatech AS | Information & communication | 2019 |
| Nettdrift AS | Information & communication | 1995 |
| New Subsea Technology AS | Professional & scientific | 2016 |
| Niho Eiendom AS | Real estate | 2025 |
| NNS AS | Agriculture & fishing | 2024 |
| Nob Holding AS | Information & communication | 2006 |
| Noble Management AS | Professional & scientific | 1995 |
| Nor Miljø Vest AS | Administrative & support | 2019 |
| Nor Produkter & Mekanikk AS | Wholesale & retail | 2016 |
| Nord HT AS | Wholesale & retail | 2023 |