| Nome Antikvariat Ans | Wholesale & retail | 2002 |
| Nome Elektro AS | Construction | 2008 |
| Nome Kompetansehus AS | Real estate | 2017 |
| Nome Regnskap AS | Professional & scientific | 2002 |
| Norbotics AS | Information & communication | 2017 |
| Norsjø Bygg -Og Utvikling AS | Real estate | 2017 |
| Norsjø Fun AS | Arts & recreation | 2020 |
| Norsjø Golfpark AS | Arts & recreation | 1999 |
| Norsjøkraft AS | Energy | 2012 |
| Norvention AS | Professional & scientific | 2020 |
| NTT AS | Wholesale & retail | 1986 |
| Nynodata AS | Information & communication | 1988 |
| O B Stoa Transport AS | Transport & logistics | 1983 |
| O Johansen Invest AS | | 2025 |
| Olsen Maskin Og Transport AS | Construction | 2024 |
| Papir Penger AS | | 2011 |
| Paramount Decisions AS | Information & communication | 2015 |
| Pavo AS | Real estate | 2011 |
| Pecan Harvest Ltd Nuf | Real estate | 2009 |
| Pecel AS | Construction | 2022 |
| Per Ole Moen AS | Construction | 1999 |
| Per Ole Moen Eiendom AS | Real estate | 2015 |
| Per Ole Moen Holding AS | Real estate | 2015 |
| Pewe Miljø AS | Professional & scientific | 2019 |
| Power by Nature Energi AS | Energy | 2024 |
| Power by Nature Holding AS | Professional & scientific | 2023 |
| Pretakst AS | Information & communication | 2024 |
| Prosjektstyring Og Event AS | Arts & recreation | 2000 |
| Providento AS | Wholesale & retail | 2024 |
| Pub Tønsberg AS | Hospitality | 2025 |
| Q10 Holding AS | | 2025 |
| Ral Eiendom AS | Real estate | 2015 |
| Rare Earths Norway AS | Mining & quarrying | 2017 |
| Raymonds Transport AS | Transport & logistics | 2004 |
| Ree Exploration AS | Professional & scientific | 2020 |
| Reigstad Eiendom AS | Real estate | 1989 |
| Reisakademiet AS | Information & communication | 2025 |
| Rentarage AS | Information & communication | 2017 |
| Rett Profilering AS | Wholesale & retail | 2015 |
| Ri Brauti Invest AS | Financial services | 2017 |
| Ringsevja 16 Da | Real estate | 2003 |
| Ringstad Kiosk AS | Wholesale & retail | 2016 |
| Ringstun Eiendom AS | Real estate | 2016 |
| Ringstun Holding AS | Real estate | 2014 |
| Romnes Moreller AS | Agriculture & fishing | 2014 |
| Rugtvedt Lagerseksjon 101 AS | Real estate | 2025 |
| Rugtvedt Lagerseksjon 102 AS | Real estate | 2025 |
| S D Cappelen Ans | Real estate | 1891 |
| S Holter Holding AS | Real estate | 2021 |
| Saga Rare Earths AS | Professional & scientific | 2007 |
| Saga Rare Earths Holding AS | Professional & scientific | 1998 |
| Sagene Tre AS | Real estate | 1991 |
| Salong Saks AS | Other services | 2013 |
| Sanna AS | | 2021 |
| Sannes Frukt AS | Agriculture & fishing | 2018 |
| SB Bygg & Montasje AS | Construction | 2009 |
| Shsj Invest AS | Real estate | 2016 |
| Skattekista Mi AS | Professional & scientific | 2011 |
| Skiftnes AS | Real estate | 2020 |
| Skjerkøya Eiendom AS | Real estate | 2011 |
| Skogsøy Panorama AS | Information & communication | 2022 |
| Sky Fitness Ulefoss AS | Arts & recreation | 2017 |
| Snowis Invest AS | Real estate | 2019 |
| Soften AS | Hospitality | 2020 |
| Solli Capital AS | | 2023 |
| Solli Vision AS | Professional & scientific | 2020 |
| Soly Crypto Asset Management AS | Financial services | 2021 |
| Soly Drift AS | Real estate | 2013 |
| Soly Group AS | Information & communication | 2011 |
| Soly Property AS | Real estate | 2017 |
| Soly Service AS | Construction | 2023 |
| Sovereign Technologies Norway AS | Information & communication | 2020 |
| Sport 1 Ulefoss AS | Wholesale & retail | 2011 |
| Stim Holding AS | | 2022 |
| Streampeak Music Da | Arts & recreation | 2007 |
| Sven Erik Andersen AS | Construction | 2024 |
| Sør-Norsk Anlegg AS | Construction | 2024 |
| Søve AS | Manufacturing | 1989 |
| Søve Eiendom AS | Manufacturing | 2005 |
| Tannlege Salomonsen AS | Health & social care | 2012 |
| Telemark Energi AS | Energy | 2020 |
| Telemark Energi Produksjon AS | Energy | 1991 |
| Telemark Hus & Hytter AS | Real estate | 2007 |
| Telemark Landskap AS | Agriculture & fishing | 2024 |
| Telemark Tak & Membran AS | Construction | 2023 |
| Telemark Transport Da | Transport & logistics | 1999 |
| Telemarkskanalen Booking AS | Administrative & support | 2019 |
| Thermowiper Norway AS | Wholesale & retail | 2012 |
| THH Eiendom AS | Real estate | 2012 |
| Tixio Technologies AS | Information & communication | 2016 |
| TJH Eiendom AS | | 2011 |
| TKT Utvikling AS | Real estate | 2015 |
| TLP Productions Da | Arts & recreation | 2022 |
| Tools Holding AS | Wholesale & retail | 2005 |
| Toreskaas Bygningartikler AS | Wholesale & retail | 2001 |
| Torsløv Eiendom AS | Real estate | 2021 |
| TVT Maskin AS | Administrative & support | 2014 |
| Ulefos AS | Manufacturing | 1999 |
| Ulefos Brug AS | Manufacturing | 1985 |
| Ulefos Brug Eiendom AS | Real estate | 1996 |