| Nordborg Invest AS | Real estate | 2006 |
| Nordic Cad & Design AS | Professional & scientific | 2025 |
| Nordic Cranetech AS | Administrative & support | 2024 |
| Nordic Ethics AS | Professional & scientific | 2026 |
| Nordvenn AS | Information & communication | 2013 |
| Norfrigo AS | Transport & logistics | 2013 |
| Norpipe Oil AS | Transport & logistics | 1995 |
| Norse Arctic AS | Real estate | 2008 |
| Norse Property AS | Real estate | 2011 |
| Norsea Eiendom Tananger AS | Real estate | 2013 |
| Norsea Group AS | Transport & logistics | 2010 |
| Norsea Impact AS | Transport & logistics | 2020 |
| Norsea Industrial Holdings AS | Transport & logistics | 2020 |
| Norsea Logistics AS | Transport & logistics | 2013 |
| Norsea Property AS | Real estate | 2013 |
| Norsea Tananger 107 AS | Real estate | 2013 |
| Norsea Wind Holding AS | | 2018 |
| Norsk Bedriftsakademi AS | Professional & scientific | 2016 |
| Norsk Vindpro AS | Energy | 1998 |
| Norske Varmepumper AS | Construction | 2023 |
| North Sea Lobster AS | Agriculture & fishing | 2025 |
| Norway Trading AS | Wholesale & retail | 1984 |
| Norwegian Energy Consultants AS | Professional & scientific | 2014 |
| NSG Maritime AS | Professional & scientific | 2000 |
| Nyland Park AS | Real estate | 2022 |
| Nærmat AS | Wholesale & retail | 2026 |
| O P Thingbø AS | Wholesale & retail | 1985 |
| Oblomov AS | Real estate | 2007 |
| Odfjell Well Services Norway AS | Mining & quarrying | 2001 |
| Oeg Offshore AS | Administrative & support | 2003 |
| Oeg Offshore Holding AS | Administrative & support | 2013 |
| Ognedal Maritime Services AS | Transport & logistics | 2018 |
| Oh&Hh AS | | 2009 |
| Oil Spill Response (Swis) Norway AS | Professional & scientific | 2016 |
| Okktav AS | Information & communication | 2022 |
| Oldtimers AS | Wholesale & retail | 2018 |
| Oljegutta AS | Real estate | 2021 |
| Oljevegen 4 AS | Real estate | 2025 |
| Om Tekstiltrykk AS | Manufacturing | 2015 |
| Onsite Treatment Services AS | Mining & quarrying | 2001 |
| Orjank Invest AS | Administrative & support | 2013 |
| Ors Rental Equipment AS | Administrative & support | 2022 |
| Orsem AS | Professional & scientific | 2016 |
| Ovenpaa Velvaere AS | Other services | 2022 |
| P. T .H. Eiendom AS | Real estate | 2004 |
| Paragon (Seillean) KS | Mining & quarrying | 2005 |
| Paragon Seillean AS | Mining & quarrying | 2001 |
| Parma Prosjektutvikling AS | Professional & scientific | 2017 |
| Pcs-Services AS | Administrative & support | 2025 |
| Peak Mentality AS | | 2026 |
| Penny Invest AS | Real estate | 1999 |
| People Performance AS | Administrative & support | 2015 |
| Per Christian Epland Holding AS | Professional & scientific | 2021 |
| Per Olav Torbjørn Og Harald Trading AS | Wholesale & retail | 1998 |
| Per Olav Torbjørn Og Haralds Services AS | Manufacturing | 1990 |
| Peri Invest AS | Real estate | 2006 |
| Petcon Tubulars AS | Wholesale & retail | 2012 |
| Phuel Norway AS | Professional & scientific | 2014 |
| Pipebeslagspesialisten AS | Construction | 2026 |
| Pjopo Invest AS | | 2020 |
| PL AS | Real estate | 1986 |
| Plattformveien 6 AS | Real estate | 2011 |
| Plen Og Hage Service AS | Administrative & support | 2023 |
| PM Bygg AS | Construction | 2006 |
| Pmi Holding AS | | 2017 |
| Polycrest AS | Transport & logistics | 2012 |
| Pon Helse Og Velvære AS | Health & social care | 2015 |
| Powerpeak AS | Education | 2024 |
| Priforsk Partners AS | Professional & scientific | 2003 |
| Professional Tooling AS | Wholesale & retail | 2018 |
| Proflame AS | Wholesale & retail | 2018 |
| Proinvest AS | Real estate | 2008 |
| Promet AS | Manufacturing | 1984 |
| Proplan Project Planning AS | Mining & quarrying | 2017 |
| Puregroup AS | Professional & scientific | 2007 |
| Qatar Shell GTL Limited | Administrative & support | 2016 |
| R.G.R. Logistics Norway AS | Transport & logistics | 2015 |
| R6 Teknologi AS | Information & communication | 2023 |
| Rae AS | Health & social care | 2007 |
| Ragbakken 84 Holding AS | Real estate | 2019 |
| Randeberg Økonomi AS | Professional & scientific | 2021 |
| RC Drift AS | Hospitality | 2008 |
| Re Capital AS | | 2026 |
| Read Ansa Holding AS | | 2022 |
| Read Ansa Top Holding AS | | 2024 |
| Real Marine AS | Wholesale & retail | 1998 |
| RECOVERY24 AS | Information & communication | 2014 |
| Redkon AS | Professional & scientific | 2017 |
| Ree Investering AS | | 2022 |
| Regex AS | Information & communication | 2014 |
| Rehablaget AS | Construction | 2020 |
| Relokasjon AS | Transport & logistics | 2022 |
| Rentaltech AS | Information & communication | 2026 |
| Rerock AS | | 2023 |
| Respond AS | Professional & scientific | 2003 |
| Rest Properties AS | Real estate | 2019 |
| Rexor Marine AS | Administrative & support | 2015 |
| Riegrot AS | | 2021 |
| Rig Partner AS | Professional & scientific | 2017 |
| Rig Partner AS | Professional & scientific | 2026 |