| Nora's Verden AS | Wholesale & retail | 2014 |
| Noras Duft AS | Wholesale & retail | 2025 |
| Nordnes Bygg AS | Construction | 2021 |
| Noreng Holding AS | Financial services | 2017 |
| Norseik Holding AS | | 2026 |
| Norsk Hotell Klassifisering Da | Professional & scientific | 2007 |
| North Venture AS | | 2018 |
| Norvik Invest AS | | 2025 |
| Notio AS | Wholesale & retail | 2005 |
| Novantique AS | Wholesale & retail | 2024 |
| Nstr AS | Information & communication | 2023 |
| Nstr Software AS | Information & communication | 2023 |
| NTG Byggkvalitet AS | Construction | 2024 |
| Ny Friisk AS | Real estate | 2022 |
| Næra Invest AS | | 2026 |
| Nøkkefaret Veilag SA | Real estate | 2021 |
| Obrigado AS | Professional & scientific | 2020 |
| Ocean Salvage AS | Professional & scientific | 2026 |
| Oddlab AS | Professional & scientific | 2011 |
| Oh La La Tangentoppen AS | Other services | 2023 |
| Oh Mama AS | Professional & scientific | 2005 |
| Oksval Båthavn SA | Other services | 1971 |
| Oksval Øst Va-Lag SA | Water & waste | 2019 |
| Olena Massasjestudio AS | Other services | 2025 |
| Oljeplattformen AS | | 2026 |
| Olsen Holding Nesodden AS | Arts & recreation | 2023 |
| Olsen Infrastruktur AS | Construction | 2026 |
| Olsen Utleie Nesodden AS | Administrative & support | 2023 |
| Oro Drift AS | Administrative & support | 2015 |
| P Sander Holding AS | Financial services | 2012 |
| P.O.P. AS | Arts & recreation | 1998 |
| Pambu AS | | 2024 |
| Papilia AS | | 2023 |
| Paradogma Pictures AS | Information & communication | 2025 |
| Pea Invest AS | Financial services | 2010 |
| Pendragon Invest AS | Financial services | 2018 |
| Petina AS | Real estate | 2005 |
| PETINA2 AS | Real estate | 2019 |
| Petsun AS | | 2022 |
| Pippa Id AS | Professional & scientific | 2008 |
| Pixfork Games AS | Information & communication | 2022 |
| Pizza Nesodden AS | Hospitality | 2011 |
| Pna Invest AS | | 2022 |
| Porridge AS | Arts & recreation | 2024 |
| Powec AS | Professional & scientific | 2021 |
| Prestegården Kragerø AS | Real estate | 2014 |
| Prime Core AS | | 2025 |
| Profesjonelle Vergers Interesseorganisasjon | Other services | 2013 |
| Prosales Steffensen & Marki Da | Wholesale & retail | 2005 |
| PS Pioneering Ans | Information & communication | 2010 |
| Quantum Drops AS | Wholesale & retail | 2024 |
| R Og L AS | Professional & scientific | 2020 |
| Rabbes Holding | Manufacturing | 2011 |
| Rah Holding AS | Financial services | 2005 |
| Rausand Data AS | Wholesale & retail | 2010 |
| Reell Avkastning AS | | 2013 |
| Reroute Consulting AS | Professional & scientific | 2009 |
| Rework AS | Professional & scientific | 2021 |
| Rinto AS | Real estate | 2004 |
| Rocketj Holding AS | | 2022 |
| Roo AS | Other services | 2015 |
| Rune Grammofon AS | Information & communication | 1998 |
| Rustikk Interiør AS | Wholesale & retail | 2007 |
| Røtter Nesodden AS | Wholesale & retail | 2007 |
| Sagveien 24 AS | Real estate | 1993 |
| Sanden+Hodnekvam Arkitekter AS | Professional & scientific | 2014 |
| Schytt Winberg AS | Information & communication | 2022 |
| Senior Compliance Partner AS | Professional & scientific | 2019 |
| Shape & Fitness Club AS | Arts & recreation | 2012 |
| SIKRING24 AS | Construction | 2026 |
| Silla Design AS | Professional & scientific | 2023 |
| Sissel Øverland AS | Financial services | 2005 |
| Sjøhest AS | Hospitality | 2025 |
| Sjøsenteret Nesodden AS | Arts & recreation | 1994 |
| Skaring AS | | 2012 |
| Smart Communication AS | Professional & scientific | 2004 |
| Smartuse AS | Information & communication | 2018 |
| Snøball Design AS | Professional & scientific | 2014 |
| Solbjørg Eiendom AS | Real estate | 1990 |
| Solbjørg Invest AS | | 2025 |
| Solsam AS | | 2023 |
| Somamed AS | Manufacturing | 2002 |
| Sommerbutikken AS | Wholesale & retail | 2016 |
| Sommerbutikken Eiendom AS | Real estate | 2016 |
| Sommerbutikken Holding AS | Professional & scientific | 2016 |
| Sow a Seed AS | | 2021 |
| Spone Holding AS | | 2021 |
| Springs Holding AS | | 2024 |
| Stang Maskin AS | Wholesale & retail | 1992 |
| Steinert AS | Financial services | 2005 |
| Steinert Invest AS | | 2026 |
| Stig Gård AS | Real estate | 2020 |
| Stine Alvestad Invest AS | | 2023 |
| Storenget Invest AS | Professional & scientific | 2017 |
| Storm Advisory AS | Information & communication | 2022 |
| Stranden Invest AS | Real estate | 1997 |
| Structure Wines AS | Wholesale & retail | 2015 |
| Studio Alf Nesodden AS | Other services | 2005 |
| Støps Vei 6 AS | Real estate | 2019 |
| Subnett AS | Information & communication | 2025 |