| Petru Byggtjenester AS | Transport & logistics | 2021 |
| Petru Distribusjon AS | Transport & logistics | 2020 |
| Petter Espeland Holding AS | | 2023 |
| Pikant Klippotek Invest | | 2023 |
| Piri Piri Lyngbygg AS | Hospitality | 2018 |
| Polartind AS | Health & social care | 2021 |
| Port Spesialisten Lister AS | Wholesale & retail | 2012 |
| Portkongen AS | Wholesale & retail | 2016 |
| Postgården Lyngdal AS | Real estate | 1998 |
| Prekon AS | Professional & scientific | 2021 |
| Probits AS | Information & communication | 2020 |
| Q 4 3 - Q Fire Tre AS | Health & social care | 1990 |
| QHT AS | Real estate | 2024 |
| Qly AS | Construction | 2015 |
| Radio Lyngdal Ba | Information & communication | 1989 |
| Ragnhild Og Brit Smesland Da | Agriculture & fishing | 1998 |
| Raven Equity AS | | 2025 |
| RDS Eiendom AS | Real estate | 2025 |
| RDS Holding AS | Mining & quarrying | 2013 |
| Reca AS | Manufacturing | 2005 |
| Reidun Høyland AS | | 2023 |
| Rejoice Always AS | Wholesale & retail | 2023 |
| Reolbørsen AS | Wholesale & retail | 1996 |
| Restaurantdrift Lyngdal AS | Hospitality | 2018 |
| Revivo AS | Water & waste | 2025 |
| Ridr Athletics AS | Wholesale & retail | 2026 |
| Risnes Holding AS | | 2026 |
| Rom Eiendom AS | Real estate | 2020 |
| Rom Gård AS | Education | 2013 |
| Rom Sagbruk AS | Real estate | 2011 |
| Romeid 2 AS | Real estate | 2011 |
| Romeid 25 AS | Real estate | 2022 |
| Romeid 30 AS | Real estate | 2017 |
| Romeid AS | Real estate | 2004 |
| Romeid Holding AS | Real estate | 2007 |
| Romåsen Utvikling AS | Real estate | 2006 |
| Rosenkrans Holding AS | | 2026 |
| Rosfjord Eiendom AS | Real estate | 2005 |
| Rosfjord Hjemmebakeri & Gatekjøkken Da | Manufacturing | 2008 |
| Rosfjord Landhandel AS | Wholesale & retail | 2021 |
| Rosfjord Strandhotel AS | Hospitality | 2005 |
| Rosfjordgruppen AS | Real estate | 1986 |
| Rov & Dykker Service AS | Mining & quarrying | 2002 |
| Runes Eiendom AS | Real estate | 1998 |
| Runes Montasje Og Utleie AS | Wholesale & retail | 2002 |
| Rødberg Service AS | Manufacturing | 2015 |
| Rør Eiendom I AS | Real estate | 2011 |
| Rørleggeren Lyngdal AS | Construction | 2003 |
| Røyrås Energi AS | Professional & scientific | 2026 |
| Røyrås Holding AS | | 2026 |
| Sagespon AS | Wholesale & retail | 1998 |
| Salong Bli Fjong AS | Other services | 2020 |
| Salong René AS | Other services | 2022 |
| Salsa Picante SA | Arts & recreation | 2025 |
| Sanasella AS | Professional & scientific | 2020 |
| Sanden Byggservice AS | Construction | 1998 |
| Sanden Byggservice Holding AS | Construction | 2005 |
| Segal Utleie AS | Real estate | 2019 |
| Seland Eiendom AS | Real estate | 1977 |
| Seland Invest AS | | 2005 |
| Senoc AS | Construction | 2014 |
| Sentrumsgården Lyngdal AS | Real estate | 2006 |
| Sepbra Holding AS | | 2022 |
| Seval Holding AS | Real estate | 2007 |
| Shipson AS | Professional & scientific | 2023 |
| SHN AS | Professional & scientific | 2017 |
| Sigdan AS | Real estate | 2022 |
| Sigurd Seland Smie & Mek Verksted AS | Manufacturing | 2002 |
| Sigve Lindland AS | Real estate | 2014 |
| Sireco Nuf | Professional & scientific | 2016 |
| Sirkelsag Holding AS | | 2023 |
| Siste Finish Interiør AS | Professional & scientific | 2025 |
| SJM AS | Professional & scientific | 2022 |
| Skaperkontoret AS | Professional & scientific | 2023 |
| Skeidar Lyngdal AS | Wholesale & retail | 2016 |
| Skipstad Holding AS | | 2026 |
| Skjærgård Eiendom AS | Construction | 2017 |
| Skjærgård Eiendom Bygg AS | Construction | 2020 |
| Skjærgård Eiendom Holding AS | Construction | 2020 |
| Skog Og Mek AS | Wholesale & retail | 2022 |
| Skogholt Invest AS | | 2025 |
| Skrekkelig AS | Real estate | 2005 |
| Skrubbåsen Utvikling AS | Real estate | 2016 |
| Skrumoen Eiendom AS | Real estate | 2007 |
| Skrumoen Holding AS | Real estate | 2001 |
| SL Utleie AS | Administrative & support | 2026 |
| Smedsland AS | Manufacturing | 2012 |
| Smultringen Lyngdal AS | Hospitality | 2019 |
| Små Pris AS | Hospitality | 2023 |
| Solsiden Lyngdal AS | Real estate | 2023 |
| Sportskongen AS | Wholesale & retail | 2023 |
| SRL Eiendom AS | Financial services | 2005 |
| Staddeland Bygg AS | Construction | 2022 |
| Staddeland Gård Da | Construction | 2007 |
| Stamsøyveien Eiendom AS | Real estate | 2021 |
| Star Bilutleie AS | Administrative & support | 2025 |
| Stas Transport AS | Transport & logistics | 2018 |
| Steinbergveien 22 AS | Real estate | 2007 |
| Stella Stars AS | Wholesale & retail | 2012 |
| Sten Tobiassen Eftf. AS | Manufacturing | 1987 |