| Kidsfashion AS | Wholesale & retail | 2020 |
| Kiil Hestnes Holding AS | Health & social care | 2011 |
| Kjelltekk AS | Construction | 2021 |
| Klausen Eiendomsutvikling AS | Real estate | 2014 |
| Klimahandling AS | Professional & scientific | 2023 |
| Koala Queen AS | Information & communication | 2021 |
| Komponisten.No AS | Arts & recreation | 2013 |
| Kopperud Invest AS | | 2020 |
| Korani Solutions AS | Professional & scientific | 2024 |
| Kristoffersen Eiendom AS | Real estate | 2003 |
| Krokstad Frukt Og Grønt AS | Wholesale & retail | 2021 |
| Krokstad Industriområde 25 AS | Real estate | 2007 |
| Krokstad Kjøtt AS | Wholesale & retail | 2023 |
| Krokstad Maskin AS | Construction | 2012 |
| Krokstad Rør AS | Construction | 2003 |
| Krokstad Tømrer Og Opplæring AS | Construction | 2025 |
| Krokstadelva Finaservice Ans | Wholesale & retail | 1990 |
| Kurskonsulentene AS | Health & social care | 2012 |
| Kurt & Pål Kristoffersen AS | Transport & logistics | 1987 |
| Kurt Kristoffersen Holding AS | Real estate | 2005 |
| La-Vitra AS | Wholesale & retail | 2021 |
| Labra AS | Financial services | 2005 |
| Langeløkka Invest AS | | 2020 |
| Lars Hoftun Holding AS | Financial services | 2010 |
| Lekkasjesøk AS | Professional & scientific | 2013 |
| Lina Holding AS | | 2023 |
| Linde Bygg & Eiendom AS | Real estate | 2005 |
| Linmo AS | Other services | 2023 |
| Linmo Eiendom 2 AS | Real estate | 2023 |
| Linmo Eiendom AS | Real estate | 2011 |
| Linmo Holding AS | Other services | 2023 |
| Litt Vrang AS | Wholesale & retail | 2022 |
| LL Invest AS | | 2021 |
| Lukern AS | Real estate | 2013 |
| Lymi Holding AS | | 2022 |
| Lysaker Byggteknikk AS | Construction | 2019 |
| Lysaker Elektro AS | Construction | 2019 |
| Lysaker Gruppen AS | Construction | 2015 |
| Lysaker Skog AS | Agriculture & fishing | 2001 |
| Lysakerlåven AS | Real estate | 2021 |
| Lysakerveien 18 AS | Real estate | 2011 |
| Løken Dagligvare AS | Wholesale & retail | 2023 |
| Løver AS | | 2025 |
| M-Torgersen Invest AS | | 2023 |
| Marianne Schulstad AS | Wholesale & retail | 2016 |
| Maskin Estate AS | Real estate | 2018 |
| Maskin Og Tilhengersenteret AS | Wholesale & retail | 2021 |
| Max-Rør AS | Construction | 2012 |
| MBJ Invest AS | | 2019 |
| Media Norge AS | Professional & scientific | 2023 |
| Mediaart Consulting Da | Information & communication | 2001 |
| Mehren & Aasvoll Eiendom AS | Real estate | 2010 |
| Mellemstrand Holding AS | | 2026 |
| Melora AS | Wholesale & retail | 2025 |
| Milert Consult AS | Professional & scientific | 2018 |
| Millennium Falcon Transport AS | Water & waste | 2020 |
| Mimo Holding AS | Wholesale & retail | 2009 |
| Min Bil AS | Wholesale & retail | 2015 |
| Mindbit AS | Information & communication | 2025 |
| Motas AS | Wholesale & retail | 2022 |
| Motas.No Maskin Og Tilhengersenteret AS | Wholesale & retail | 2023 |
| Mottak Nord Eiendom AS | Real estate | 2024 |
| Munkejord Holding AS | Real estate | 2013 |
| Myklemyr Bygg & Ski AS | | 2026 |
| Myllier AS | Wholesale & retail | 2022 |
| Måne Bakeri AS | Hospitality | 2024 |
| Naga AS | Professional & scientific | 2017 |
| NE Group AS | Real estate | 2000 |
| Nedre Eiker Grunneierlag SA | Arts & recreation | 1967 |
| Nedre Eiker Menighetssenter AS | Real estate | 2007 |
| Neste Etappe AS | Arts & recreation | 2023 |
| Nguyen Helse AS | Health & social care | 2023 |
| Nilsen Trefelling Og Skogsdrift AS | Agriculture & fishing | 2017 |
| Nofo Personal&Business Consulting AS | Administrative & support | 2024 |
| Nom Anlegg AS | | 2020 |
| Nordet AS | Hospitality | 2023 |
| Nordgips AS | Construction | 2015 |
| Nordisk-Solskjerming AS | Construction | 2021 |
| Norlights Montessoribarnehage Drammen AS | Education | 2010 |
| Norsk Elkontroll AS | Professional & scientific | 2013 |
| Norway Estate AS | Real estate | 2022 |
| Nugget AS | | 2018 |
| O S Skogsservice Da | Agriculture & fishing | 1999 |
| O2 Sport Norge AS | Wholesale & retail | 2016 |
| Oda E. Wang Holding AS | | 2024 |
| Ok Elektriske AS | Construction | 2003 |
| Olav Stuveseth AS | Manufacturing | 1988 |
| Ole Ivar Bergan Holding AS | | 2020 |
| Ole T Fevang AS | | 2023 |
| Olsen Catering AS | Hospitality | 2021 |
| Onstage AS | Administrative & support | 2022 |
| Opk-Instituttet AS | Education | 2021 |
| Opplæringskonsult AS Skole Og Forlag | Other services | 1985 |
| Opsahl Holding AS | | 2015 |
| Orv Consulting AS | Professional & scientific | 2016 |
| Ottesen Trading AS | Professional & scientific | 2022 |
| Outlet Service AS | Wholesale & retail | 2020 |
| P5 Invest AS | Professional & scientific | 2014 |
| Pen Holding AS | | 2019 |
| Peneo Invest AS | Real estate | 2020 |