| Partytime Event AS | Professional & scientific | 2001 |
| Pe Consulting AS | Professional & scientific | 2017 |
| Penta Invest AS | Real estate | 2005 |
| PLG Overflate-Teknikk AS | Construction | 2006 |
| Proff Bilmegling AS | Wholesale & retail | 2015 |
| Proff Varme AS | Construction | 2012 |
| Prorigg AS | Arts & recreation | 2016 |
| Radar Invest AS | | 2020 |
| Rapina AS | Information & communication | 2016 |
| Rojohan Holding AS | | 2025 |
| Rolf Storbråten & Sønn AS | Construction | 1973 |
| Røsberg Maskin AS | Administrative & support | 1997 |
| Sandbakken Sportsstue AS | Hospitality | 2015 |
| Siggerud Antennelag Ba | Information & communication | 1975 |
| Siggerud Sauna AS | Other services | 2026 |
| Siggerud Video Og Kiosk Hollevik Ans | Administrative & support | 1993 |
| Siggerudveien Bilverksted AS | Other services | 1982 |
| Sisdesign AS | Professional & scientific | 2011 |
| Ski Maling Og Overflateteknikk AS | Construction | 2024 |
| Skisakeråsen Va SA | Water & waste | 2013 |
| Sleep Inn - Rent a Home AS | Real estate | 2018 |
| Slukke AS | Construction | 2025 |
| Smell Fresh AS | Administrative & support | 2024 |
| Something New Eiendom AS | Real estate | 2020 |
| Special Needs Toys Norway AS | Professional & scientific | 2024 |
| Svakstrømsinstallatøren AS | Construction | 2010 |
| Sær Skriving AS | Professional & scientific | 2023 |
| Sørmarka AS | Hospitality | 2000 |
| T&S Bygg AS | Construction | 2023 |
| Tiger Safari AS | Wholesale & retail | 1996 |
| Tjueførti AS | Administrative & support | 2026 |
| TMT Gruppen AS | Construction | 2025 |
| Tolleshaug Dagligvare AS | Wholesale & retail | 2021 |
| Travel News Media AS | Information & communication | 2025 |
| Travel News Media Nuf | Information & communication | 2020 |
| Truenorth Holding AS | Professional & scientific | 2013 |
| Trygg Auto AS | Wholesale & retail | 2023 |
| TS Bygg Invest AS | Construction | 2023 |
| Vangen Skistue AS | Education | 2006 |
| Vepak AS | Manufacturing | 2014 |
| Villamamma Da | Information & communication | 2009 |
| VVR Bygg AS | Construction | 2014 |
| Waveray AS | Professional & scientific | 2026 |
| Wildoslo AS | Administrative & support | 2020 |