| Mega AS | | 2018 |
| Mekjarvik 4 AS | Real estate | 2021 |
| Mekjarvik Eiendom AS | Mining & quarrying | 2011 |
| Mestergården AS | Construction | 1981 |
| Mesterhus Stavanger AS | Real estate | 2006 |
| Mets AS | | 2022 |
| Mida Sol AS | Administrative & support | 2005 |
| Middleton Invest AS | | 2024 |
| Midtjord AS | Financial services | 2012 |
| Milliwatt AS | Professional & scientific | 2024 |
| Milliwatt Holding AS | | 2026 |
| Miramis Invest AS | Real estate | 2008 |
| MK Drilling and Wells AS | Professional & scientific | 2017 |
| Mobideck AS | Manufacturing | 2015 |
| Modiolus AS | Health & social care | 2017 |
| Momenta AS | Wholesale & retail | 2015 |
| Moroand AS | Real estate | 2005 |
| Mos Holding AS | | 2025 |
| Motor-Service AS | Real estate | 1961 |
| MT Maskin AS | Agriculture & fishing | 2021 |
| Murmester Skarpenes AS | Construction | 2020 |
| Mæle Invest AS | Financial services | 2018 |
| Navitas Holding AS | | 2026 |
| Navitas Insight AS | Professional & scientific | 2025 |
| NDT Partner AS | Professional & scientific | 2007 |
| Necoin Eiendom AS | Real estate | 2000 |
| Necoin Holding AS | | 2025 |
| Neste Gen Group AS | | 2021 |
| Nesthus Invest AS | | 2021 |
| Nico Bygg AS | Construction | 2024 |
| Nor Oil Tools AS | Wholesale & retail | 2016 |
| Nordanno AS | Administrative & support | 2019 |
| Nordic Clinic AS | Health & social care | 2012 |
| Nordic Fuel Systems AS | Wholesale & retail | 2019 |
| Nordic Tractor AS | Wholesale & retail | 2025 |
| Norsk Logistikkpartner AS | Transport & logistics | 2023 |
| Norske Muligheter AS | | 2021 |
| Norstay AS | Administrative & support | 2016 |
| North Well Gefro AS | Manufacturing | 2008 |
| Nortrain Eiendom AS | Education | 2006 |
| Nortrain Holding AS | Education | 2006 |
| Norway Calls Ans | Information & communication | 2019 |
| Norwegian Drilling Academy AS | Education | 2006 |
| Norwegian Offshore Technology AS | Professional & scientific | 2025 |
| Norwegian Waste to Energy AS | Water & waste | 2000 |
| Nos Elektro AS | Construction | 2024 |
| Nse Eiendom AS | Real estate | 2025 |
| Nse Fagstillas Holding AS | Construction | 2022 |
| Nse Gruppen AS | Construction | 2021 |
| Nse Industrier AS | Construction | 2000 |
| NWG Eiendom AS | Real estate | 2017 |
| Nybø AS | Real estate | 2016 |
| Nybø Fellespakkeri AS | Administrative & support | 2026 |
| Nyvoll Barnehage SA | Education | 2000 |
| Nyvollgården Næring AS | Real estate | 2000 |
| Nærbø Industripark AS | Real estate | 2013 |
| O.Voll AS | Real estate | 2015 |
| Octillio AS | Professional & scientific | 2017 |
| Oddvar Harestad AS | Construction | 2004 |
| Odnaberget AS | Professional & scientific | 2022 |
| Offshore Heavy Cube Solutions AS | | 2016 |
| Offshore Resource Group AS | Mining & quarrying | 2007 |
| Oker Holding AS | | 2023 |
| Oker Invest AS | | 2021 |
| Olar Invest AS | | 2020 |
| Olaribs Norge AS | Professional & scientific | 2024 |
| Omhåland AS | | 2025 |
| On & Off Service AS | Other services | 1990 |
| Org Engineering AS | Mining & quarrying | 1999 |
| Orkla Landbrukspark AS | Real estate | 2023 |
| Osjord AS | Professional & scientific | 2019 |
| Oykonos AS | Information & communication | 2021 |
| Packs of Norway AS | Wholesale & retail | 2025 |
| Pedersen & Saxvik AS | | 2024 |
| Perigon AS | Wholesale & retail | 2003 |
| Perigon Da | Wholesale & retail | 1996 |
| Petrolhead AS | Wholesale & retail | 2019 |
| Pholding AS | Financial services | 2011 |
| Phron Nova AS | Information & communication | 2020 |
| Pimp Holding AS | Arts & recreation | 2020 |
| PJC AS | | 2021 |
| Plan- Og Byggkontoret AS | Professional & scientific | 2021 |
| Porto AS | Other services | 2013 |
| Portrep AS | Wholesale & retail | 2004 |
| Prestegård Consulting AS | Professional & scientific | 2018 |
| Product Supply AS | Wholesale & retail | 1994 |
| PS Selskapsutleie AS | Administrative & support | 2023 |
| PS Selskapsutleie Eiendom AS | Real estate | 2023 |
| PS Selskapsutleie Holding AS | Administrative & support | 2024 |
| Pubben AS | Hospitality | 1995 |
| Pumpesystemer AS | Manufacturing | 2013 |
| Påbygg Invest AS | Other services | 1996 |
| Qualisoft Holding AS | Financial services | 2005 |
| Raadvill PK AS | Professional & scientific | 2018 |
| Radon Sør-Vest AS | Professional & scientific | 2016 |
| Raft Trening AS | Arts & recreation | 2003 |
| Raft-Klinikken AS | Health & social care | 2007 |
| Rakkestad Traktor Og Maskin AS | Wholesale & retail | 2026 |
| Ranbo AS | | 2024 |
| Randaberg Apotek AS | Wholesale & retail | 2021 |