| Morina Invest AS | | 2022 |
| Morus AS | Agriculture & fishing | 2020 |
| Mosflata Industribygg AS | Real estate | 2002 |
| Mosvannet Park Næring AS | Real estate | 2020 |
| Motehuset Haugesund AS | Wholesale & retail | 2009 |
| Moura Holding AS | | 2026 |
| Moxcon AS | Real estate | 2006 |
| MP Trading AS | Wholesale & retail | 2012 |
| MPG Holding AS | | 2025 |
| MR Flis AS | Construction | 2022 |
| MR Handel AS | Wholesale & retail | 2023 |
| Mrsa AS | Health & social care | 2013 |
| Mse Holding AS | Professional & scientific | 2008 |
| Mur Bygg Montering AS | Construction | 2015 |
| Murerfirma Breitve AS | Construction | 1996 |
| Murmester Christian Hetland AS | Construction | 2017 |
| Musikkselskapet Nordvegen AS | Arts & recreation | 2006 |
| Mvba Holding AS | | 2026 |
| My Company AS | Professional & scientific | 2007 |
| My Moods AS | Information & communication | 2023 |
| Möy Design AS | Professional & scientific | 2022 |
| Mø Holding AS | | 2021 |
| Møller Bil Haugesund AS | Other services | 1987 |
| Møllerfabrikken Drift AS | Hospitality | 2025 |
| Møllerfabrikken Eiendom AS | Hospitality | 2023 |
| Møllerveien Holding AS | | 2016 |
| Mørch Pizza 2 AS | Hospitality | 2022 |
| Mørch Pizza Holding AS | Hospitality | 2022 |
| Nagellgaarden AS | Wholesale & retail | 2015 |
| Nano and Quantum Technology AS | Professional & scientific | 2022 |
| Naoned AS | | 2025 |
| Nargis AS | Construction | 2022 |
| Nasjonalt Senter for Utvikling Av Nye Marine Oppdrettsarter Num AS | Professional & scientific | 2024 |
| Nassiep Holding AS | | 2025 |
| Naturbakst AS | Manufacturing | 2001 |
| Naturbakst Holding AS | Manufacturing | 2012 |
| Naustbakken AS | Financial services | 2012 |
| Nautical Institute Norway Branch | Administrative & support | 2003 |
| NCL Oslofjord AS | Transport & logistics | 2022 |
| NCP Holding AS | Manufacturing | 2024 |
| NCP Technology AS | Professional & scientific | 2025 |
| NDH Holding AS | Construction | 2023 |
| Ndt.Kai AS | Professional & scientific | 2024 |
| Neptun Invest Haugesund AS | Real estate | 2014 |
| Nesseby Eiendom AS | Real estate | 2016 |
| Nestor AS | | 2021 |
| Nettpsykiateren AS | Information & communication | 2001 |
| Netwiset AS | Hospitality | 2019 |
| Neu Skin AS | Wholesale & retail | 2023 |
| New Solutions AS | Manufacturing | 2014 |
| Nextgn SA | Education | 2024 |
| NF Gjenbruk AS | Wholesale & retail | 2020 |
| NFH 250212 AS | Transport & logistics | 2025 |
| NHC Holding AS | Administrative & support | 2021 |
| Nicolaysen Invest AS | | 2026 |
| Niflheim AS | Information & communication | 2013 |
| Nils Kraft Holding AS | Real estate | 2010 |
| Nils Wathne Auto AS | Wholesale & retail | 1992 |
| Nilsen & Partners AS | Administrative & support | 2026 |
| Nilssen & Sønner Engros AS | Real estate | 1966 |
| Nipen Invest AS | | 2020 |
| Nippon Yusen Kabushiki Kaisha | Administrative & support | 2004 |
| Nito Investeringer AS | Real estate | 2002 |
| NKP Bygg B AS | Real estate | 2016 |
| Nle AS | Transport & logistics | 2021 |
| NMS Eiendom AS | Real estate | 2011 |
| Noatun AS | Real estate | 2002 |
| Noci AS | Wholesale & retail | 2004 |
| Nocon AS | Professional & scientific | 1996 |
| Nokus AS | Real estate | 2017 |
| Noorbym AS | Wholesale & retail | 2017 |
| Nor Invest AS | | 2022 |
| Nor Opsjonstomt AS | Real estate | 2025 |
| Nora Haugesund AS | Other services | 2011 |
| Norbiz Holding AS | Other services | 2019 |
| Nord Rogaland Blikk & Ventilasjon AS | Construction | 1993 |
| Nordahl Consulting AS | Professional & scientific | 2025 |
| Nordahl Griegs Gate 1 AS | Real estate | 2018 |
| Nordbø Og Seglem AS | Professional & scientific | 1993 |
| Norden Solutions AS | Professional & scientific | 2023 |
| Nordhaug Invest AS | Real estate | 1994 |
| Nordic Clean Pumps AS | Manufacturing | 2022 |
| Nordic Clean Water AS | Manufacturing | 2015 |
| Nordic Clima AS | Wholesale & retail | 2021 |
| Nordic Energizer AS | Manufacturing | 2014 |
| Nordic Fashion Quality Brands AS | Professional & scientific | 2025 |
| Nordic Wave AS | Real estate | 2018 |
| Nordic-Trade AS | Transport & logistics | 2020 |
| Nordlo Haugesund AS | Information & communication | 2019 |
| Nordrenergi AS | Energy | 2020 |
| Nordsjø Kontorpark AS | Real estate | 2016 |
| Nordskrift AS | Wholesale & retail | 2025 |
| Nordstrøm Eigedomsselskap AS | Financial services | 2015 |
| Nordvegen AS | Arts & recreation | 2009 |
| Noreveien 9 AS | Real estate | 2013 |
| Norfloor Haugesund Frøland Flis Og Bad AS | Wholesale & retail | 2004 |
| Norheim 1 F AS | Real estate | 2021 |
| Norheim 1B AS | Real estate | 2008 |
| Norheim 1C AS | Real estate | 2008 |
| Norheim 1D AS | Real estate | 2008 |