| MK Capital AS | Information & communication | 2010 |
| Mogus AS | Financial services | 2010 |
| Moldernes AS | | 2025 |
| Monhus Holding AS | Wholesale & retail | 2021 |
| Montgomery Consulting AS | Professional & scientific | 2025 |
| Mossa Holding AS | | 2025 |
| MPR Bolig AS | Real estate | 2022 |
| Mr.Bra Holding AS | | 2023 |
| MS Rognerud Holding AS | | 2026 |
| Mt-Service AS | Administrative & support | 2025 |
| Mtebe AS | Information & communication | 2020 |
| Murmester Andreas Kammen AS | Construction | 2022 |
| Myhres Transport AS | Transport & logistics | 2014 |
| Myran Holding AS | | 2026 |
| Møbel-Team AS | Wholesale & retail | 1984 |
| Møbelconsult AS | Wholesale & retail | 2024 |
| Nakatremi AS | Arts & recreation | 2016 |
| Naked Hollywood Records Da | Information & communication | 2006 |
| Namas AS | Professional & scientific | 2010 |
| Naprapati by Eide AS | Health & social care | 2022 |
| Nardo Og Melhus Bilskade AS | Other services | 2019 |
| Navigates AS | Real estate | 2013 |
| NCK Holding AS | Hospitality | 2010 |
| Need Holding AS | Manufacturing | 2005 |
| Nerwin AS | Education | 2019 |
| Nett Passle AS | Real estate | 2020 |
| Nevrist Holding AS | | 2026 |
| Nice Things AS | Wholesale & retail | 2020 |
| Nidaros Boligutvikling AS | Real estate | 2017 |
| Nidaros Elektro AS | Construction | 2018 |
| Nidaros Næringseiendom AS | Real estate | 2009 |
| Nidelven Bygg AS | Construction | 2014 |
| Nobel Eiendom AS | Real estate | 2026 |
| Nomek AS | Manufacturing | 1999 |
| Nora 04 AS | Real estate | 2015 |
| Nordic Financial Consultants AS | Education | 2024 |
| Nordic Nutrition Tech AS | Agriculture & fishing | 2023 |
| Nordid AS | Professional & scientific | 2011 |
| Nordpå Holding AS | Information & communication | 2020 |
| NORDVIK1 Eiendomsservice AS | Administrative & support | 2025 |
| NORDVIK1 Holding AS | Administrative & support | 2021 |
| Norest Invest AS | Professional & scientific | 2021 |
| Norflyt AS | | 2019 |
| Norsk Betong Og Tilslagslaboratorium AS | Professional & scientific | 2014 |
| Norske Filter AS | Construction | 1998 |
| Norvegr Invest AS | | 2021 |
| Norveta AS | Professional & scientific | 2026 |
| Nota Invest AS | Real estate | 2015 |
| Nuh Utvikling AS | Real estate | 2019 |
| Nydammen Familiebarnehage AS | Education | 2023 |
| Nyskudd Invest AS | | 2022 |
| Næverdal Invest AS | Financial services | 2014 |
| Obsidian AS | | 2022 |
| Oceandrive AS | Wholesale & retail | 2020 |
| Oceanex AS | Information & communication | 2020 |
| Odin Vedlikehold AS | Construction | 2009 |
| Odins Eiendom AS | | 2018 |
| Office Partner AS | Wholesale & retail | 2005 |
| Ok Invest AS | | 2022 |
| Omhus AS | Real estate | 2017 |
| Omi AS | Education | 2014 |
| Operations Engineering AS | Professional & scientific | 2024 |
| Opphaug Holding AS | Financial services | 2017 |
| Optilås AS | Construction | 2020 |
| Ordflyt AS | Information & communication | 2026 |
| Orpheus Holding AS | | 2025 |
| Oryx Holding AS | Construction | 2008 |
| OS8 Holding AS | | 2025 |
| Otium Invest AS | Financial services | 2017 |
| Ottante Cosmetics Norge Ans | Wholesale & retail | 2024 |
| Ove Reitan Transport AS | Transport & logistics | 2013 |
| Overvik Eiendom AS | Real estate | 2014 |
| Oyne Holding AS | | 2020 |
| P H Hansen AS | | 2025 |
| Pappasjappa AS | Wholesale & retail | 2021 |
| PAR4 AS | Professional & scientific | 2012 |
| Paru AS | Real estate | 2019 |
| Peak Capital Nuf | Professional & scientific | 2006 |
| Pedron Holding AS | | 2012 |
| Per Jørgensen Marketing AS | Professional & scientific | 2016 |
| Petersborg Øwre AS | Professional & scientific | 2024 |
| Petter Hepsø Invest AS | Financial services | 2015 |
| Phalanx AS | Wholesale & retail | 2021 |
| Pinnsvin Eiendom AS | Real estate | 2026 |
| PK Service AS | Construction | 1999 |
| Plasthallutleie AS | Administrative & support | 2020 |
| Plumi Læring AS | Education | 2026 |
| Podrick Invest AS | Real estate | 2006 |
| Polar Trading Da | | 1994 |
| Polardome AS | Real estate | 2023 |
| Power to X AS | Energy | 2022 |
| Pro Invenia AS | Professional & scientific | 2008 |
| Pro Regnskap AS | Wholesale & retail | 1995 |
| Proeiendom AS | Real estate | 2026 |
| Professor Grong AS | Professional & scientific | 2018 |
| Q-Free AS | Information & communication | 1984 |
| Q-Free Group AS | Information & communication | 2023 |
| Q-Free Norge AS | Information & communication | 2018 |
| Qualis AS | Real estate | 2012 |
| R Holding AS | Professional & scientific | 2016 |