| Per Erik Mathisen Holding AS | | 2025 |
| PH14 Holding AS | | 2020 |
| Piscatorum Holding AS | Real estate | 2021 |
| Plass Eiendom AS | Real estate | 2022 |
| Polkon Regnskap AS | Professional & scientific | 2021 |
| Ponderis AS | Other services | 2022 |
| Praktverk AS | Education | 2012 |
| Price Lagerbutikk AS | Wholesale & retail | 2000 |
| Proakt AS | Information & communication | 2013 |
| Prodekkservice AS | Wholesale & retail | 2020 |
| Puffen AS | Water & waste | 2025 |
| Pål Klausen Holding AS | Financial services | 2013 |
| Pål Syvertsen Multiservice AS | Administrative & support | 2022 |
| R Martinsen AS | Construction | 2015 |
| R Smeby Forskaling & Betong AS | Real estate | 2009 |
| R. Ivers Holding AS | Professional & scientific | 2019 |
| R. M Holding AS | | 2022 |
| Raol Ans | Other services | 1998 |
| Razmas Bygg AS | Construction | 2016 |
| Razmas Hus AS | Construction | 2019 |
| RDJ Invest AS | Construction | 2020 |
| Regnskapsjefen AS | Professional & scientific | 2025 |
| Regnskapsjefen Eiendom AS | Real estate | 2025 |
| Regnskapsjefen Holding AS | Real estate | 2025 |
| RFJ Holding AS | | 2023 |
| Rib Konsult AS | Professional & scientific | 2021 |
| Richardsen Holding AS | Real estate | 2021 |
| Ringulreid AS | | 2021 |
| Ripel Bygg AS | Construction | 2014 |
| Ripel Eiendom Da | Real estate | 2006 |
| Ripel Utleie AS | Real estate | 2019 |
| Roa Gran AS | | 2023 |
| Roberi AS | Real estate | 2016 |
| Ronny Og Robert Holding AS | Wholesale & retail | 2008 |
| Rosh Holding AS | | 2020 |
| Rsa Cars AS | Wholesale & retail | 2025 |
| S&S Avfallstjenester AS | Water & waste | 2026 |
| S2 Holding AS | Real estate | 2013 |
| Sandbraaten AS | Education | 2017 |
| Sanido Eiendom AS | Real estate | 2012 |
| Sanido Holding AS | Professional & scientific | 2013 |
| Sanlux AS | Wholesale & retail | 2024 |
| Sann Holding AS | Health & social care | 2021 |
| Sapmo Holding AS | | 2024 |
| Selcotek Composites 2 AS | Manufacturing | 2026 |
| Selcotek Composites AS | Manufacturing | 2014 |
| Setera Holding AS | | 2026 |
| SHF Invest AS | | 2016 |
| Sidney Pizzakiosk Og Gatekjøkken Da | Hospitality | 2001 |
| Simmi Holding AS | Financial services | 2005 |
| Siveth AS | | 2005 |
| Skadi Regnskap AS | Professional & scientific | 2022 |
| Skispesialisten AS | Other services | 2010 |
| Skjønberg Holding AS | | 1996 |
| Skorpion Nettlift AS | Wholesale & retail | 2024 |
| Skyped AS | Education | 2014 |
| Skysparc AS | Professional & scientific | 2025 |
| Smetten a Og B AS | Real estate | 2022 |
| Smud Middagshjelp AS | Other services | 2026 |
| Smudfood Holding AS | | 2026 |
| So Simple AS | Information & communication | 2018 |
| Solbergvannsveien SA | Real estate | 1964 |
| Solem Holding AS | Construction | 2005 |
| Somnium Consulting AS | Professional & scientific | 2018 |
| Sorthvit Film AS | Information & communication | 2017 |
| SPL Powerlines Norway AS | Construction | 2009 |
| Steen Estate AS | Real estate | 2020 |
| Steenberg & Hennum AS | Real estate | 2021 |
| Steenberg Holding AS | Real estate | 2022 |
| Steig Til Værs AS | | 2019 |
| Stenseth Barnehage SA | Education | 2003 |
| Storegrø AS | Wholesale & retail | 1999 |
| Strax Auto-Service AS | Other services | 2008 |
| Struktur Eiendom AS | Real estate | 2012 |
| Sub Buskerud AS | Hospitality | 2014 |
| Sveen Investment AS | | 2005 |
| Svein Lien AS | Manufacturing | 2000 |
| Synergi AS | | 1997 |
| Syvertsen Totalbygg AS | Construction | 2025 |
| T Sørum Invest AS | Construction | 2006 |
| Tak Og Bygg Partner AS | Construction | 2013 |
| Tannlege Halvard Vik AS | Health & social care | 2009 |
| Tannlege Mellemstrand AS | Health & social care | 2026 |
| TDS Bygg AS | Construction | 2026 |
| Team Myklemyr AS | Real estate | 2019 |
| Techcons Invest AS | | 2019 |
| Tequpe Holding AS | | 2026 |
| Terje Navjord AS | Real estate | 2003 |
| That AS | Professional & scientific | 2018 |
| The Cars AS | Wholesale & retail | 2025 |
| Tilhengersenter Vest AS | Wholesale & retail | 2022 |
| Tim Andre Mathisen Holding AS | | 2025 |
| Tlns Group AS | Information & communication | 2023 |
| TMS Eiendom AS | Real estate | 2020 |
| TMS Holding AS | Real estate | 2018 |
| Tna Holding AS | Financial services | 2008 |
| Toau Holding AS | | 2022 |
| Topptek Entreprenør AS | Construction | 2019 |
| Torsve Holding AS | | 2023 |
| Touchstone Treasury Center AS | Administrative & support | 2017 |