| Magnolia Hudpleie AS | Other services | 2017 |
| Makiro Holding AS | | 2025 |
| Malermester Dias AS | Construction | 2022 |
| Marine Pro AS | Professional & scientific | 2017 |
| Marmite AS | | 2021 |
| Marnie & Co AS | Real estate | 2025 |
| Marthe Røssaak AS | Professional & scientific | 2026 |
| Master Hands AS | Construction | 2018 |
| Mazari Invest AS | Real estate | 2012 |
| Meek Eiendom AS | Real estate | 2022 |
| Meek Holding AS | Real estate | 2022 |
| Mi-Co AS | Construction | 2020 |
| Miljøsofa Slemmestad AS | Wholesale & retail | 2023 |
| Millennium Forvaltning AS | Real estate | 1998 |
| Minsa AS | Construction | 2024 |
| Miramar Holding AS | Wholesale & retail | 2018 |
| Mirrow AS | Professional & scientific | 2021 |
| ML Bygg Og Oppussing AS | Construction | 2013 |
| ML Plenum AS | Hospitality | 2018 |
| MLK Consulting AS | Professional & scientific | 2024 |
| Mmi Invest AS | | 2024 |
| Montasjeservice Holding AS | Manufacturing | 2023 |
| Morbergtoppen Fus Barnehage AS | Education | 2018 |
| Morten Viken AS | Real estate | 2019 |
| Moxell Invest AS | Financial services | 2007 |
| MPT AS | Hospitality | 2025 |
| My Legacy AS | Information & communication | 2026 |
| Namdal Plast Eiendom AS | Real estate | 2018 |
| National Eiendom AS | Real estate | 2005 |
| National Eiendom OD44 Holding AS | | 2019 |
| Nefas Norsk Erfaringssenter AS | Administrative & support | 1995 |
| Neos AS | Administrative & support | 2022 |
| Netad AS | Real estate | 2013 |
| NG2 Eiendom AS | Real estate | 2021 |
| NG3 Nettverk AS | Information & communication | 2022 |
| Nilo Holding AS | | 2026 |
| Nina Transeth Invest AS | | 2018 |
| NK Consulting AS | Professional & scientific | 2025 |
| NKH AS | | 2025 |
| Noela Invest AS | | 2022 |
| Nomadmapper AS | Information & communication | 2026 |
| Nonstop Shop AS | Wholesale & retail | 2012 |
| Nordgaard's Holding AS | | 2005 |
| Nordic Tek AS | Wholesale & retail | 2025 |
| Norpax AS | Manufacturing | 2007 |
| Norrønt AS | Professional & scientific | 1996 |
| Nums AS | Information & communication | 2015 |
| Nye Montasjeservice AS | Manufacturing | 2023 |
| Nye Namnam Da | Hospitality | 2008 |
| Oase Holding AS | | 2022 |
| Odden Marina Bryggesamvirke SA | Arts & recreation | 2003 |
| Olaf Larsen Eftf Ans | Wholesale & retail | 1995 |
| Ore Maskin AS | Administrative & support | 2026 |
| Organic Lifestyle AS | Wholesale & retail | 2020 |
| Oslo Life Science Advisors AS | Professional & scientific | 2015 |
| Overhalla Drift AS | Real estate | 2021 |
| Palex Holding AS | Real estate | 2019 |
| Papayaloca AS | Professional & scientific | 2014 |
| Parda Holding AS | Real estate | 2013 |
| Paste AS | Arts & recreation | 2019 |
| Pedagogisk Service AS | Arts & recreation | 2013 |
| PG Møbler AS | Wholesale & retail | 2019 |
| Phpm Holding AS | Real estate | 2017 |
| Plastmo AS | Wholesale & retail | 1970 |
| PLM Holding AS | | 2005 |
| Pons Helse AS | Health & social care | 2021 |
| Pooltech AS | Wholesale & retail | 2010 |
| PP Eiendom AS | Real estate | 2011 |
| Pro Byggtakst AS | Real estate | 2024 |
| Professional Lift Trade Works AS | Construction | 2025 |
| Proxy AS | Professional & scientific | 2003 |
| Prozium AS | | 2018 |
| Qe Invest AS | Real estate | 2019 |
| Quality Management Consultants AS | Professional & scientific | 1995 |
| Reccademy AS | Education | 2025 |
| Ren Tex AS | Wholesale & retail | 1992 |
| Rent IT AS | Professional & scientific | 2015 |
| Ringø Bygg | Construction | 1999 |
| Rixtel AS | Wholesale & retail | 2012 |
| Rortunet Frisør AS | Other services | 2018 |
| Rortunet Ur Og Smykker AS | Wholesale & retail | 2021 |
| Rosness & Pfister AS | Information & communication | 2025 |
| Røyken Og Hurums Avis AS | Information & communication | 1976 |
| Røyken Rens AS | Other services | 2021 |
| S:T Eriks Norge AS | Wholesale & retail | 2007 |
| Safetech Entreprenør AS | Real estate | 2006 |
| Safetech PJP AS | Real estate | 2019 |
| Safetech Vann Og Avløpstjenester AS | Construction | 2024 |
| Sanitær Teknikk AS | Construction | 2019 |
| Saxen AS | Other services | 1998 |
| Saxen Hårstudio AS | Other services | 2005 |
| Scanporten AS | Wholesale & retail | 2014 |
| Schecker Consulting AS | Information & communication | 2026 |
| Skadestyring AS | Professional & scientific | 2017 |
| Skofteland Film AS | Information & communication | 2017 |
| Skårebo Nordic AS | Wholesale & retail | 2025 |
| Slemmestad Autosenter AS | Wholesale & retail | 2017 |
| Slemmestad Bil AS | Other services | 1989 |
| Slemmestad Bilvask AS | Other services | 2012 |
| Slemmestad Consulting AS | Professional & scientific | 2019 |