| Kamaje AS | Financial services | 2012 |
| Kardemomme 19 AS | | 2023 |
| Karl Martin Røed AS | Health & social care | 2019 |
| Kaupanger Nærings Og Handelspark AS | Real estate | 2017 |
| Kave Invest AS | | 2019 |
| Kilen Barnehage AS | Education | 2022 |
| Kimmerns Service & Vedlikehold AS | Administrative & support | 2023 |
| Kiærs Brug Eiendom AS | Real estate | 2021 |
| KJ Eiendom Da | Real estate | 2005 |
| Kjedekollisjon AS | Professional & scientific | 2016 |
| Kjenne Holding AS | | 2026 |
| Kjøkøy Minemagasin AS | Real estate | 2010 |
| Kjøkøysund Marina AS | Wholesale & retail | 1994 |
| Kjønigsen Art AS | Arts & recreation | 2022 |
| Kjønigsen Holding AS | | 2024 |
| Kjørvik Prosjekt AS | Professional & scientific | 2022 |
| Kle Deg AS | Wholesale & retail | 2012 |
| Klemsdal Eiendom AS | Real estate | 1991 |
| Klipper Holding AS | | 2025 |
| Knipen AS | Real estate | 2015 |
| Knudsen Og Gulbrandsen Bygg AS | Construction | 2026 |
| Knut Henriksen Sten Eiendom AS | Real estate | 2005 |
| Kolstad Mesterbygg AS | Construction | 2008 |
| Konditorerlbeck AS | Manufacturing | 2026 |
| Konsept Eiendomsutvikling AS | Real estate | 2025 |
| Krag-Larsen Invest AS | | 2025 |
| Kranfører AS | Construction | 2020 |
| Kreta Aroma AS | Hospitality | 2025 |
| Kriho Sko AS | Wholesale & retail | 2008 |
| Kristian Dahl AS | Construction | 2021 |
| Kristian Klev Andersen Holding AS | Real estate | 2019 |
| Kristofer Vedlikehold AS | Construction | 2019 |
| KRJ Holding AS | Manufacturing | 2005 |
| Krogstadfjorden AS | Real estate | 2022 |
| Krosnes Brygge AS | Arts & recreation | 2013 |
| Krosneslund 29A AS | Real estate | 2021 |
| Kroton AS | Manufacturing | 2012 |
| Kråkerøy Bilverksted AS | Other services | 2015 |
| Kubikk AS | Professional & scientific | 2012 |
| L.A.E Invest AS | | 2021 |
| Landskap Invest AS | Financial services | 2005 |
| Larzen AS | Real estate | 2012 |
| Lasse Holst AS | Construction | 1989 |
| Lastemaskiner AS | Transport & logistics | 1971 |
| Lavandula Holding AS | | 2025 |
| Lavendel Holding AS | Health & social care | 2019 |
| Lavender Holding AS | | 2023 |
| Leif Erik Andersen AS | Wholesale & retail | 2017 |
| Leif Olsen Varmepumper & Boligrehabilitering AS | Construction | 2021 |
| Lerkeveien 2 AS | Real estate | 2005 |
| Lethe AS | Professional & scientific | 1990 |
| Lie Stensrud Holding AS | Real estate | 2023 |
| Liebekk Invest AS | Construction | 2022 |
| Lilleby Invest AS | Real estate | 2014 |
| Lilleng Naturbarnehage AS | Education | 2022 |
| Linso Da | Manufacturing | 2025 |
| Lislebyveien 163 AS | Real estate | 2023 |
| Logoprodukter AS | Wholesale & retail | 2019 |
| Lokal Business Da | Arts & recreation | 2014 |
| Lothe Håndverk AS | Construction | 2021 |
| Louli AS | | 2021 |
| LRP Holding AS | Financial services | 2014 |
| Lte AS | | 2023 |
| Ludvig Invest AS | Real estate | 2023 |
| Lundebuen Eiendom AS | Manufacturing | 2007 |
| Lundeby Invest AS | | 2022 |
| Luteriveien AS | Real estate | 1987 |
| Lvø AS | Transport & logistics | 2005 |
| M Holst Holding AS | Construction | 2016 |
| M&M Bygg AS | Administrative & support | 2016 |
| M-K Hverdagshelse AS | Health & social care | 2019 |
| M-K Renhold AS | Administrative & support | 2020 |
| M. & R. Andreassen AS | Arts & recreation | 2023 |
| M. Brudevold Holding AS | | 2025 |
| M104 Eiendom AS | Real estate | 2020 |
| Ma Hauge Holding AS | | 2026 |
| Mackenzie AS | Other services | 2020 |
| Madelene's Magic AS | Other services | 2025 |
| Magnus Victory Group AS | | 2021 |
| Maj Holding AS | Real estate | 2010 |
| Majo Consulting Ans | Other services | 2009 |
| Makrellen AS | Construction | 2010 |
| Malerfirma Henning Rubinstein AS | Construction | 2016 |
| Malermester Jan-Erik Strand AS | Construction | 2026 |
| Malula Invest AS | Professional & scientific | 2011 |
| Mama's AS | Information & communication | 2026 |
| Maqtronic AS | | 2025 |
| Marco CHR. Wolf Nuf | Information & communication | 2020 |
| Margrethes Transport AS | Transport & logistics | 2022 |
| Mari Jæger Holding AS | | 2018 |
| Marina Jessica AS | Other services | 2023 |
| Marine Consult-Charter Nuf | Wholesale & retail | 2015 |
| Marine Partner AS | Wholesale & retail | 2002 |
| Marnet AS | Administrative & support | 2017 |
| Marnet Fritidsbolig 1 AS | Real estate | 2017 |
| Marnet Invest AS | | 2026 |
| Marnet Marina AS | Wholesale & retail | 2017 |
| Marnet Marine Park AS | Real estate | 2014 |
| Marnetveien Veiforening | Real estate | 2005 |
| Marnetvika Båtforening AS | Real estate | 2014 |