| Richard Larsen Eiendom AS | Real estate | 2007 |
| Riddervoll Eiendom AS | Arts & recreation | 2013 |
| Rimstad VVS AS | Construction | 2018 |
| Ringdal AS | Real estate | 2005 |
| Ringdal Jord Og Maskin AS | Agriculture & fishing | 2005 |
| Ringdal Nord AS | Real estate | 2024 |
| Ringdal Sør AS | Real estate | 2024 |
| Ringdal Utvikling AS | Real estate | 2008 |
| Ringdalskogen Eiendom AS | Real estate | 2024 |
| Ringebu Bolig AS | Real estate | 2018 |
| Ringsevja 12 Ulefoss AS | Real estate | 2014 |
| Risa Retail AS | Wholesale & retail | 2012 |
| Risajevnheim Butikkdrift AS | Wholesale & retail | 2026 |
| Risøya Elektro Mekaniske AS | Professional & scientific | 1997 |
| Risøyveien 4 Stavern AS | Real estate | 2025 |
| Rits Da | Wholesale & retail | 2001 |
| Rixi AS | Wholesale & retail | 1986 |
| RM Holding AS | Financial services | 2005 |
| RNT Renhold AS | Administrative & support | 2021 |
| Roars Gym AS | Arts & recreation | 2013 |
| Robert Bergan AS | | 2025 |
| Robust Resources AS | Professional & scientific | 2017 |
| Rocks of Norway AS | Manufacturing | 2010 |
| Rolf Døvle AS | Financial services | 2005 |
| Rolf Hageland Invest AS | Financial services | 2016 |
| Rolfsen Eiendomservice AS | Construction | 2019 |
| Rolwal Holding AS | Wholesale & retail | 2021 |
| Romani Ite Domum AS | | 2020 |
| Romberggata 2 Larvik AS | Real estate | 2019 |
| Romforalle AS | Real estate | 2025 |
| Ronalds Rør & Sveiceservice AS | Construction | 2012 |
| Rosenborg Eiendomsservice AS | Construction | 2026 |
| Rosendals Perle AS | Hospitality | 2023 |
| Rosenvilde Prosjekt AS | Real estate | 2021 |
| RPM Autoservice AS | Wholesale & retail | 2026 |
| RS Bygg & Maskin AS | Construction | 2021 |
| Rsa Eiendomservice AS | Construction | 2008 |
| Rsa Gruppen AS | Real estate | 2014 |
| Rseg AS | Professional & scientific | 1989 |
| RTJ Invest AS | Information & communication | 2005 |
| Ruben Eiendom AS | Real estate | 2018 |
| Ruben Holding AS | Manufacturing | 2005 |
| Rune Sveberg AS | Education | 2012 |
| Runes Matstue AS | Transport & logistics | 2021 |
| Rusaanes Holding AS | | 2022 |
| Rush Larvik AS | Arts & recreation | 2020 |
| Rusle Holding AS | | 1992 |
| Russma Holding AS | Financial services | 2007 |
| Ryeng Invest AS | | 2025 |
| Rått Og Sanselig AS | Wholesale & retail | 2004 |
| Rødbølveien 14 A4 AS | Real estate | 2025 |
| Rødstad AS | Real estate | 2020 |
| Røkan AS | Real estate | 2005 |
| Rør-Teknikk AS | Construction | 2025 |
| Rørleggersenteret AS | Construction | 2008 |
| Rørleggersenteret Eiendom AS | Real estate | 2022 |
| Røsjorde Holding AS | Financial services | 2014 |
| Røsjordets Snekkeri AS | Construction | 2007 |
| Røste&Kaupang SA | Arts & recreation | 2025 |
| Røyseberget AS | | 2018 |
| Røyseberget Vann- Og Avløpslag SA | Water & waste | 2017 |
| S O S Security AS | Administrative & support | 2005 |
| S1 Invest AS | | 2026 |
| S24 Larvik AS | Arts & recreation | 2026 |
| Sa-La AS | Financial services | 2008 |
| Sabo Hair Design AS | Other services | 2017 |
| Safety Consult AS | Transport & logistics | 2002 |
| Saga Business Partner AS | Information & communication | 2004 |
| Saga Eiendom Larvik AS | Real estate | 2015 |
| Saga Holding Larvik AS | Real estate | 2015 |
| Saga Regnskap & IT AS | Professional & scientific | 2022 |
| Saga Regnskap Og Rådgivning AS | Professional & scientific | 1986 |
| Sagen Invest AS | Real estate | 1997 |
| Saggården a AS | Real estate | 2008 |
| Saggården B AS | Real estate | 2008 |
| Saggården C AS | Real estate | 2008 |
| Saggården D AS | Real estate | 2008 |
| Salez Direct AS | Wholesale & retail | 2000 |
| Salsås Eiendom AS | Real estate | 2022 |
| Samhus AS | Professional & scientific | 2022 |
| Sammen for Livet AS | Health & social care | 2016 |
| Sandborgen AS | Professional & scientific | 2017 |
| Sanden 1 AS | Real estate | 2008 |
| Sanden 8 Eiendom AS | Hospitality | 2026 |
| Sanden Brygge AS | Real estate | 2008 |
| Sanden Brygge Næring AS | Real estate | 2022 |
| Sanden Parkering Hjemmel AS | Real estate | 2016 |
| Sandnes Media AS | Information & communication | 1997 |
| Sannidal Eiendom AS | Real estate | 2012 |
| Sapphire Property AS | Real estate | 2020 |
| Sauro Rørmontasje AS | Construction | 1993 |
| Sbos-Holding AS | | 2022 |
| SBV 50 AS | Real estate | 2006 |
| SC Holding AS | Transport & logistics | 2005 |
| Sc-Trans Da | Transport & logistics | 1990 |
| Scandi Trade AS | Wholesale & retail | 2020 |
| Scanditest AS | Wholesale & retail | 2004 |
| Schäpers Holding AS | | 2022 |
| Scilla Holding AS | | 2021 |
| Scott Bader Scandinavia AB | Wholesale & retail | 1996 |