| Norsk Elektroteknikk AS | Construction | 2020 |
| Novo Helsesenter AS | Health & social care | 2018 |
| Nye Bikkja AS | Real estate | 2017 |
| Nyvegen 8 AS | Real estate | 2018 |
| Nødslakt Øst AS | Agriculture & fishing | 2018 |
| Odion AS | | 2024 |
| Olim Holding AS | | 2022 |
| Olsrud Eiendomsutvikling AS | Real estate | 2011 |
| Omsorgsverket AS | Wholesale & retail | 1987 |
| Oslo Bil Auto AS | Wholesale & retail | 2020 |
| Ovis Records Da | Information & communication | 2009 |
| Owa Holding AS | | 2024 |
| Owre Invest AS | | 2013 |
| Pacon AS | Construction | 2014 |
| PAGE4YOU Nuf | Information & communication | 2021 |
| Palatiner AS | Professional & scientific | 2019 |
| Palatiner Capital AS | Professional & scientific | 2019 |
| Pe Bygg AS | Construction | 2017 |
| Peliar Eiendom AS | Administrative & support | 2023 |
| Peliar Holding AS | Administrative & support | 2023 |
| Peo Holding AS | | 2016 |
| Pesu Eidsvoll Verk AS | Wholesale & retail | 2000 |
| Pizzadrift Råholt AS | Hospitality | 2020 |
| PJ Services AS | Administrative & support | 2025 |
| Platekjellern & Co | Wholesale & retail | 1984 |
| Pål Einar Storsveen Invest AS | Financial services | 2016 |
| R&Y Boligfornying AS | Construction | 2025 |
| Ra Auto AS | Wholesale & retail | 2023 |
| Radiocom AS | Wholesale & retail | 2010 |
| Rambukk Sport AS | Education | 2013 |
| Rbe Holding AS | Real estate | 2006 |
| RBR Holding AS | | 2022 |
| Reklame-Huset.No AS | Manufacturing | 1994 |
| Remmes Holding AS | Health & social care | 2020 |
| Respons Håndverk Og Service AS | Construction | 2024 |
| RF Eiendom AS | Real estate | 2015 |
| RGM Romeriksguiden Ans | Professional & scientific | 1994 |
| RH Bygg Og Vedlikehold AS | | 2019 |
| RHS Eiendom 2 AS | Real estate | 2024 |
| RHS Eiendom AS | Real estate | 2018 |
| RHS Invest AS | Construction | 2024 |
| Rimea Holding AS | | 2026 |
| Romerike A/C Service AS | Other services | 2019 |
| Romerike Boligtakst AS | Professional & scientific | 2026 |
| Rostad Holding AS | Administrative & support | 2005 |
| Ruma Holding AS | Real estate | 2018 |
| Ruma Næringseiendom AS | Real estate | 2018 |
| Rune's Bygg Og Eiendom AS | Construction | 2011 |
| Rygh Trening AS | Education | 2020 |
| Rynning Eiendom AS | Real estate | 2021 |
| Råholt Byutvikling AS | Real estate | 2019 |
| Råholt Eiendom AS | Real estate | 2005 |
| Råholt Eiendom Bolig AS | | 2025 |
| Råholt Fysioterapi AS | Health & social care | 2000 |
| Råholt Legesenter Da | Health & social care | 2020 |
| Råholt Optikk AS | Wholesale & retail | 2026 |
| Råholt Pizza Og Grill Da | Hospitality | 2008 |
| Råholt Sushi AS | Hospitality | 2025 |
| Råholt Tannlegesenter AS | Health & social care | 2005 |
| Råholt Trafikkskole AS | Education | 2024 |
| Råholt Øre Nese Hals AS | Health & social care | 2020 |
| Råmat AS | Wholesale & retail | 2026 |
| Saki Sushi AS | Hospitality | 2022 |
| Salong Tideman AS | Other services | 2020 |
| Salto Systems AS | Wholesale & retail | 2014 |
| Sam Design AS | Professional & scientific | 2018 |
| Sandholt AS | Real estate | 1985 |
| Scan-Pack Norge AS | Wholesale & retail | 1992 |
| Secret Gardens Oslo AS | Administrative & support | 2026 |
| Shala Gym AS | Arts & recreation | 2025 |
| Shala Shop AS | Wholesale & retail | 2026 |
| Siena Pizzeria Og Grill AS | Hospitality | 2013 |
| Siljuberg Taksering AS | Real estate | 2015 |
| Skandibarn Ans | Arts & recreation | 2025 |
| Skogby Invest AS | | 2017 |
| Snapburger Råholt AS | Hospitality | 2014 |
| Snekkerkunst AS | Construction | 2023 |
| Solheim-Holding AS | | 2018 |
| Solum Og Allouch Eiendom AS | Real estate | 2016 |
| Steinar Øverbye AS | Real estate | 1996 |
| Stenberg Tjenester AS | Professional & scientific | 2025 |
| Step Ahead AS | Transport & logistics | 2024 |
| Sushi Asia Baobab AS | Hospitality | 2023 |
| Telekiosken Eidsvoll AS | Information & communication | 2014 |
| Terapivakten AS | Health & social care | 2013 |
| Terapivakten Kurs Og Kompetanse AS | Education | 2022 |
| TH Malerservice AS | Construction | 2012 |
| The Bams Group AS | | 2025 |
| Thorell AS | Professional & scientific | 2019 |
| Thorell Services AS | Professional & scientific | 2019 |
| Thujakongen AS | Wholesale & retail | 2019 |
| Tinche Holding AS | Other services | 2025 |
| TK Boligutvikling AS | Real estate | 2026 |
| TK Eiendomsutvikling AS | Real estate | 2017 |
| TK Investment AS | | 2022 |
| TK Næringsutvikling AS | Real estate | 2022 |
| TL Transport AS | Transport & logistics | 2023 |
| To Be Holding AS | | 2019 |
| Tomren Invest AS | Wholesale & retail | 2005 |
| Tormod Knutsens Veg 2 AS | | 2015 |