| Prosence AS | Wholesale & retail | 2019 |
| PS Anleggsgartner AS | Administrative & support | 2006 |
| PS Utleie AS | Administrative & support | 2021 |
| Punkers AS | Professional & scientific | 2023 |
| Purepipe Ltd | Professional & scientific | 2009 |
| Pusterommet Yoga Og Ayurveda Institutt AS | Education | 2016 |
| Pysen AS | | 2012 |
| Q4P Bvba | Professional & scientific | 2014 |
| Quality Furniture Da | Wholesale & retail | 1996 |
| Quantum Borealis Technology AS | Information & communication | 2024 |
| R Lindland Holding AS | | 2026 |
| R-H Bygg & Vedlikehold AS | Construction | 2022 |
| Ramazzotti AS | Real estate | 1998 |
| Rambac AS | Wholesale & retail | 2007 |
| Ramsvoa Invest AS | Financial services | 2018 |
| Ranja Eiendom AS | Administrative & support | 1996 |
| Rapetti Holding AS | Transport & logistics | 2025 |
| Rauneveien Barnehage AS | Education | 2013 |
| Raunic AS | Information & communication | 2026 |
| Ravenport Holding AS | | 2026 |
| RB Venture AS | Real estate | 2018 |
| Rb-Invest AS | Real estate | 2024 |
| Rbinvest AS | Financial services | 2015 |
| Rebefo AS | Agriculture & fishing | 2021 |
| Red Devils AS | Administrative & support | 2016 |
| Redeye Safety AS | Manufacturing | 2012 |
| Redskapsbua AS | Real estate | 2016 |
| Regnskap Sør AS | Professional & scientific | 1995 |
| Reidun Holding AS | Education | 2016 |
| Reier AS | Financial services | 2017 |
| Reklamekontoret AS | Professional & scientific | 2004 |
| Rekruttering Sør AS | Administrative & support | 2019 |
| Relopp AS | Wholesale & retail | 2024 |
| Relopp Holding AS | | 2024 |
| Rembest AS | | 2009 |
| Reme Fritid AS | Real estate | 2015 |
| Remegården AS | Real estate | 2020 |
| Remo AS | Real estate | 2001 |
| Remo Eiendom AS | Real estate | 2015 |
| Rempark AS | Real estate | 2023 |
| Renew AS | Health & social care | 2023 |
| Renseanlegg Dal SA | Water & waste | 2022 |
| Restaurant HR Redaktør AS | Hospitality | 2001 |
| Retu AS | Arts & recreation | 2018 |
| Revisorsenteret Mandal AS | Professional & scientific | 2005 |
| RFS Invest AS | Real estate | 2005 |
| RGR Invest AS | Financial services | 2018 |
| Rigedalen 51-53 AS | Real estate | 2016 |
| Rilas Eiendom AS | Real estate | 2007 |
| Riskman AS | Professional & scientific | 2011 |
| Risøbank Kafè Da | Hospitality | 2007 |
| Riverside AS | Hospitality | 2001 |
| RJR AS | Professional & scientific | 2016 |
| RJR Eiendom AS | Real estate | 2020 |
| RL Entreprenør AS | Real estate | 2019 |
| RMK AS | Professional & scientific | 2010 |
| Ro Auto AS | Wholesale & retail | 2023 |
| Roaldstveit Eiendom Ans | Real estate | 1999 |
| Robert Holding AS | Professional & scientific | 2012 |
| Roe Holding AS | Arts & recreation | 2013 |
| Rogna 4 AS | | 2025 |
| Rohet AS | Financial services | 2018 |
| Roland Revisjon AS | Professional & scientific | 2025 |
| Ronisku Invest AS | | 2022 |
| Rosenvoll AS | Agriculture & fishing | 2003 |
| Rox Consult AS | Professional & scientific | 2026 |
| RST Holding AS | Real estate | 2005 |
| Rteiendom AS | Real estate | 2021 |
| Ruanjasa AS | | 2026 |
| Rubato Invest AS | Real estate | 2005 |
| Rugas Eiendom AS | Real estate | 2020 |
| Rune Pedersen Malerfirma AS | Construction | 2007 |
| Ruwa AS | | 2025 |
| Ryving WPC AS | Professional & scientific | 2000 |
| Ryvingen Invest AS | | 2012 |
| Røssevika Eiendom AS | Real estate | 2022 |
| Røyseland Gård AS | Real estate | 2012 |
| S Studio AS | Professional & scientific | 2024 |
| S-Ferie Da | Administrative & support | 2009 |
| S.Kagestad Café AS | Hospitality | 2023 |
| Saanum Eiendom AS | Health & social care | 2017 |
| Saanum Holding AS | Health & social care | 2022 |
| Saasaa AS | | 2023 |
| Saga 28 AS | Real estate | 1991 |
| Sagaga AS | Administrative & support | 2003 |
| Salong 2000 Mandal AS | Other services | 2020 |
| Salong Eli AS | Other services | 2022 |
| Salong MR & MRS AS | Other services | 1995 |
| Salthaug AS | Professional & scientific | 2025 |
| Salthaug Prosjekt AS | Professional & scientific | 2017 |
| Saltverket 6 AS | Real estate | 2016 |
| Saltverket Eiendom AS | Real estate | 1986 |
| Saltverket Utvikling Sør AS | Real estate | 2008 |
| Samaki Invest AS | Real estate | 2025 |
| Sams Vaktmestertjenester AS | Administrative & support | 2016 |
| Samvirkelaget Mandal | Wholesale & retail | 1912 |
| Sana-As | | 2025 |
| Sanden Helsesenter AS | Real estate | 2017 |
| Sandnes Camping AS | Hospitality | 2022 |
| Sandnes Holding AS | Administrative & support | 2005 |