| PC En En Tre AS | Other services | 2023 |
| Peak Merch AS | Professional & scientific | 2003 |
| Pedimer AS | Health & social care | 2013 |
| Pegasus Index AS | Financial services | 2010 |
| Pellia AS | Financial services | 2022 |
| Pemco Träpellets AB | Manufacturing | 2010 |
| Petite Frisørene AS | Other services | 1999 |
| Petite Frisørene Sandvika AS | Other services | 2023 |
| PH Nails & Beauty AS | Other services | 2026 |
| Piceas AS | Professional & scientific | 2023 |
| Pilot IT Management AS | Information & communication | 2026 |
| Pink by Utseende.No Sandvika AS | Wholesale & retail | 2024 |
| Plan Aav Ans | Professional & scientific | 2020 |
| Planck Horizon AS | | 2025 |
| Plas Blomster AS | Wholesale & retail | 2013 |
| Poa Holding AS | | 2025 |
| Polaris Hub Norway AS | Administrative & support | 2022 |
| Polyfai AS | Information & communication | 2019 |
| Popeross AS | Professional & scientific | 2026 |
| Potensialbygger AS | Professional & scientific | 2017 |
| Precise Prediction Holding AS | Information & communication | 2014 |
| Pretty AS | Information & communication | 2018 |
| PRF Holding AS | | 2025 |
| Prieta AS | Financial services | 2005 |
| Primesource AS | Information & communication | 2009 |
| Probike AS | Wholesale & retail | 2015 |
| Produkt Ventilasjon AS | Manufacturing | 1995 |
| Proskin AS | Other services | 2017 |
| Provaris Norway AS | Professional & scientific | 2022 |
| PST Geoteknikk AS | | 2017 |
| Psykiater Osmani Sandvika AS | Health & social care | 2015 |
| Psykolog Berge AS | Health & social care | 2024 |
| Psykologisk Forum AS | Health & social care | 1996 |
| Puigbanon AS | Wholesale & retail | 2022 |
| Pundall AS | Financial services | 2005 |
| Pure IT AS | Wholesale & retail | 2020 |
| Pure Logic AS | Professional & scientific | 2015 |
| Purenordic AS | Professional & scientific | 2020 |
| Py Pizza & Kebab Huset AS | Hospitality | 2018 |
| På Håret Eiendom AS | Real estate | 2000 |
| På Håret Frisør AS | Other services | 2004 |
| Påhåret Gruppen AS | Administrative & support | 2007 |
| Qomo Sandvika AS | Wholesale & retail | 2025 |
| Qvitre AS | Professional & scientific | 2020 |
| R.A Holding AS | | 2020 |
| R.H.Krefting Holding AS | | 2020 |
| Railfokus AS | Professional & scientific | 2025 |
| Ranelagh AS | Health & social care | 2008 |
| Rask & Smart AS | Wholesale & retail | 2009 |
| Recar AS | Wholesale & retail | 2024 |
| Red Ant AS | Information & communication | 2014 |
| Regine AS | Administrative & support | 1989 |
| Regnskapsskolen.Com AS | Information & communication | 2020 |
| Reini Eiendom AS | Real estate | 2010 |
| Reinskarven Eiendom AS | | 2025 |
| Reistad Bolig AS | Real estate | 2017 |
| Reksten Invest AS | Real estate | 1997 |
| Restaurant Caspar AS | Hospitality | 2010 |
| Rett Og Vrang AS | Wholesale & retail | 1976 |
| Revir Spesialistklinikk AS | Health & social care | 2024 |
| Revir Works AS | Real estate | 2023 |
| Rexebassen AS | Real estate | 2019 |
| Reymert Holding AS | Professional & scientific | 2020 |
| Rindeschilde AS | | 2025 |
| Ringeriksveien 155 AS | Real estate | 1976 |
| Ringeriksveien 162 AS | Real estate | 2024 |
| Ringeriksveien 195 AS | Real estate | 1997 |
| Ringeriksveien 70 AS | Real estate | 2006 |
| Rio Frisør AS | Other services | 2026 |
| Risør Gjestgiveri AS | Real estate | 2020 |
| RM Sandvika AS | Wholesale & retail | 2012 |
| Roar Pels AS | Manufacturing | 2019 |
| Roar Pels Eiendom AS | Real estate | 2019 |
| Roar Pelsindustri AS | Manufacturing | 2018 |
| Robson Bygg AS | Construction | 2025 |
| Rondane Invest AS | Professional & scientific | 2015 |
| Rondo Sandvika AS | Hospitality | 2025 |
| Ropern AS | Real estate | 2006 |
| Rosenkrantzborg AS | Agriculture & fishing | 2005 |
| Ross Media AS | Professional & scientific | 2022 |
| Routetonordic AS | Professional & scientific | 2015 |
| RS Holding AS | | 2024 |
| Rudsletta 35 AS | Real estate | 2001 |
| Ryger Areal AS | Real estate | 2022 |
| Røhnegården Sandvika AS | Real estate | 1983 |
| S.R.C. Productions Da | Arts & recreation | 2004 |
| S10A Eiendom AS | Real estate | 2014 |
| Sabai Massasje AS | Other services | 2023 |
| Sabrura AS | Information & communication | 2016 |
| Sagitarius Invest AS | Financial services | 2005 |
| Saia Frisør AS | Other services | 2013 |
| Sakarias Holding AS | Wholesale & retail | 2020 |
| Saltnes Invest AS | | 2005 |
| Sameiet Birkheim Da | Real estate | 2014 |
| Sameiet Torpstubben 45-51 | Households | 1992 |
| Sand 35 Holding AS | Real estate | 2012 |
| Sandekra AS | Real estate | 1999 |
| Sandvigen Trading AS | Wholesale & retail | 2013 |
| Sandvika 1 Bilpleie AS | Wholesale & retail | 2010 |
| Sandvika Advokatkontor Da | Professional & scientific | 1978 |