| Jan Toreg Film-Og Tv-Produksjon Ans | Information & communication | 1996 |
| Jeff Lugowe AS | Information & communication | 2026 |
| Jkdesign AS | Professional & scientific | 2025 |
| Jonny Harila Anestesisykepleie AS | Health & social care | 2021 |
| JP Wine AS | Wholesale & retail | 2014 |
| Juno Norge AS | Education | 2025 |
| K&M Bygg AS | Construction | 2023 |
| Kaffe Og Sånt AS | Hospitality | 2011 |
| Kanonsuper AS | Professional & scientific | 2023 |
| Kap Horn AS | Information & communication | 2015 |
| Karusell AS | | 2020 |
| Kavringen AS | Real estate | 2012 |
| KBG Eiendom AS | Real estate | 2018 |
| KBL- Invest AS | Financial services | 2014 |
| Kirkums Holdings AS | Financial services | 2017 |
| Kitek AS | Information & communication | 2024 |
| Kjerstin Falkum Holding AS | | 2025 |
| Kjesbu Holding AS | | 2024 |
| Klesarven AS | Wholesale & retail | 2019 |
| KM Trading & Ingrids Agentur AS | Wholesale & retail | 2006 |
| Kodeko Digital AS | Information & communication | 2025 |
| Koja Research AS | Professional & scientific | 2026 |
| Kokkim Import AS | Wholesale & retail | 2026 |
| Kongsaiya Invest AS | | 2023 |
| Konsern AS | Professional & scientific | 2017 |
| Krabban AS | Information & communication | 2022 |
| Kragvin Holding AS | Administrative & support | 2005 |
| Krinka Prosjekt AS | Real estate | 2017 |
| Krogstad Holding AS | Financial services | 2005 |
| Krystall Kommunikasjon AS | Professional & scientific | 2024 |
| Kumba AS | Wholesale & retail | 2022 |
| Kunstigogkulørt AS | | 2021 |
| Kvalitetshåndverk AS | Construction | 2017 |
| KWD Bygg Og Farge AS | Construction | 2025 |
| Kwmedia AS | Financial services | 2011 |
| Kyst AS | Professional & scientific | 1991 |
| L1P Holding AS | | 2024 |
| Lakris Eiendom AS | Real estate | 2009 |
| Lamalo AS | | 2023 |
| Lars CHR. Knardahl AS | Water & waste | 2005 |
| Lasania AS | Professional & scientific | 2022 |
| Lauvås Absolutt Nuf | Education | 2008 |
| Lehn Creates Holding AS | | 2025 |
| Leikvold Maskiner AS | Administrative & support | 2000 |
| Leirdal AS | Administrative & support | 2021 |
| Leirdal Eiendomskjøp AS | Real estate | 2025 |
| Leirdal Invest AS | | 2025 |
| Lervold Holding AS | | 2026 |
| Lervold Sikkerhet AS | Construction | 2000 |
| Let's Go Management AS | Construction | 2017 |
| Lie Skog Ans | Agriculture & fishing | 1961 |
| Lindéh & Lindholm AS | Professional & scientific | 2015 |
| Linnemann Holding AS | Real estate | 2006 |
| Ljung Invest AS | Professional & scientific | 2005 |
| LM Gruppen AS | | 2020 |
| Lothes Kiropraktortjenester AS | Health & social care | 2012 |
| Lubiana Holding AS | | 2020 |
| Lud 2 Holding AS | | 2022 |
| Lyngstadaas Biomedical Consulting AS | Professional & scientific | 2004 |
| M.A.R. Arkitekter AS | Professional & scientific | 2006 |
| Maja Bratseth Holding AS | | 2022 |
| Manzanera Ventures AS | Professional & scientific | 2025 |
| Marinbiologene Da | Information & communication | 2006 |
| MCR Holding AS | Administrative & support | 2016 |
| Midtgarden Lia Drift AS | Real estate | 2003 |
| Mina Adelina AS | Wholesale & retail | 2021 |
| Mina AS | Wholesale & retail | 2023 |
| Mini Layers AS | Wholesale & retail | 2025 |
| Moegro AS | Financial services | 2016 |
| Muffe AS | | 2025 |
| Muunluun AS | Information & communication | 2016 |
| Mymla Holding AS | | 2024 |
| Myrt AS | Real estate | 2018 |
| Myrull Holding AS | Information & communication | 2019 |
| Myrull Media AS | Information & communication | 2019 |
| Nanna Invest AS | Wholesale & retail | 2008 |
| Naturpress AS | Arts & recreation | 2017 |
| Nautikom AS | Professional & scientific | 2020 |
| Navarsete Nesodden AS | Hospitality | 2025 |
| Navigo Sørøst AS | Financial services | 2018 |
| Naviqon AS | Information & communication | 2025 |
| ND Eiendom AS | Professional & scientific | 2008 |
| Nesodden Danseskole AS | Education | 2022 |
| Nesodden Elektro AS | Construction | 2019 |
| Nesodden Flyttebyrå AS | Transport & logistics | 2024 |
| Nesodden Frukt & Grønt AS | Wholesale & retail | 2015 |
| Nesodden Håndverktjenester AS | Construction | 2022 |
| Nesodden Ingeniørbygg AS | Construction | 2012 |
| Nesodden Jern & Fargehandel AS | Wholesale & retail | 1987 |
| Nesodden Marina Service AS | Manufacturing | 2014 |
| Nesodden Vertshus AS | Hospitality | 2026 |
| Nesoddtangen Kjøreskole AS | Education | 2013 |
| Nesoddtangen Legesenter Da | Health & social care | 2001 |
| Next Horizon Advisory AS | Information & communication | 2025 |
| Next Horizon Holding AS | | 2025 |
| Next Horizon Investment AS | Real estate | 2025 |
| Nexus Integration AS | Information & communication | 2020 |
| Nono Norge AS | Arts & recreation | 2026 |
| Noor Trading AS | Wholesale & retail | 2012 |
| Nor Tømrer & Malertjenester AS | Construction | 2023 |