| PMP Holding AS | Real estate | 2005 |
| PNT Kontortjenester AS | Professional & scientific | 2021 |
| Polaris Distribusjon Midt-Norge AS | Transport & logistics | 2001 |
| Polaris Trykk AS | Manufacturing | 2008 |
| Polaris Trykk Trondheim AS | Manufacturing | 1998 |
| Pop Bumper AS | Administrative & support | 2015 |
| Porsgrunn Eiendom AS | Real estate | 2014 |
| Position AS | Wholesale & retail | 2012 |
| Pragma Assets AS | | 2026 |
| Pragma Industries AS | | 2026 |
| Pragma Machining AS | | 2026 |
| Prima Arena AS | Health & social care | 2017 |
| Prima AS | Health & social care | 1992 |
| Prima Eiendom Trondheim AS | Real estate | 2021 |
| Prima Holding Trondheim AS | Health & social care | 2017 |
| Prinsessefin AS | Wholesale & retail | 2022 |
| Promotion Auto AS | Wholesale & retail | 2016 |
| Provdrift AS | Administrative & support | 2018 |
| Psyksenteret AS | Health & social care | 2026 |
| Pyroblade Norge AS | Wholesale & retail | 2026 |
| Quality Care AS | Wholesale & retail | 2005 |
| Quality Frisør AS | Other services | 2020 |
| R. Munkhaugen AS | Real estate | 2015 |
| Ragas AS | Professional & scientific | 2008 |
| Rakkarberget AS | Real estate | 2005 |
| Ramlo AS | Transport & logistics | 2007 |
| Ramlo Eiendom AS | Real estate | 2019 |
| Ramlo P&G AS | Administrative & support | 2018 |
| Ramlo Sandtak AS | Mining & quarrying | 1997 |
| Ramtind 1 AS | Real estate | 2018 |
| Ramtind AS | Real estate | 2018 |
| Ramtind Syd AS | Real estate | 2019 |
| Ranheim Herregård AS | Real estate | 2011 |
| Ras Frisør AS | Other services | 2013 |
| Rcoach AS | Real estate | 2016 |
| Re-Service AS | Transport & logistics | 2015 |
| Real Eiendomsservice AS | Administrative & support | 2019 |
| Refseth Maskin Og Betong AS | Construction | 2008 |
| Refys AS | Health & social care | 2016 |
| Regnskapscoachen AS | Professional & scientific | 2018 |
| Rekrutteringsagenten AS | Professional & scientific | 2007 |
| Rel Holding AS | Construction | 2021 |
| Relmo Logistikk Og Montasje AS | Construction | 2015 |
| Ren Heimdal AS | Real estate | 2006 |
| Renax Renholdsservice AS | Administrative & support | 2011 |
| Renhold 24 AS | Administrative & support | 2023 |
| Retura TRV AS | Water & waste | 2005 |
| Riddervolds Gate 11 AS | Real estate | 2016 |
| Ringvålskogen Barnehage SA | Education | 1993 |
| Ringvålvegen 12A AS | Real estate | 2021 |
| Ringvålvegen 22 AS | Real estate | 2020 |
| Ringvålvegen 8 AS | Real estate | 2011 |
| Risp Holding AS | Financial services | 2005 |
| RM Bil AS | Wholesale & retail | 2020 |
| Rockpartner Enterprises AS | Professional & scientific | 2008 |
| Roger Løkke AS | | 2021 |
| Rolseth Eiendom AS | Real estate | 2018 |
| Rosten Consulting AS | Professional & scientific | 2014 |
| Rostinvest AS | Real estate | 2016 |
| Rostinvest Technology AS | | 2017 |
| Royal Heimdal AS | Wholesale & retail | 2025 |
| Runar Aalberg Transport AS | Transport & logistics | 2013 |
| Runar Næss Holding AS | | 2025 |
| Russesletta AS | Real estate | 2019 |
| Ryptind AS | Real estate | 2019 |
| Røhmen Holding AS | | 2025 |
| S Korsvik Holding AS | | 2025 |
| S-A Auto AS | Wholesale & retail | 2018 |
| S-L Eiendom AS | | 2016 |
| S. Munkhaugen AS | Hospitality | 2014 |
| Sagbakk Byggservice AS | Construction | 2019 |
| Sagmyr Holding AS | | 2005 |
| Samhold AS | Information & communication | 2025 |
| Sanda Bygg AS | Construction | 2025 |
| Sandgata 26A AS | Real estate | 2016 |
| Sandgruppen Holding AS | | 2024 |
| Sandosveien 1 AS | Real estate | 2012 |
| Santeo Nor AS | Real estate | 2016 |
| Santeo Utvikling AS | Real estate | 2013 |
| Scanprofil AS | Wholesale & retail | 2024 |
| Seide AS | | 2021 |
| Selbekk Holding AS | | 2005 |
| Senternor AS | Real estate | 2004 |
| Sentrum Kiropraktorklinikk Heimdal AS | Health & social care | 2012 |
| Sesam Ressurs AS | Professional & scientific | 2017 |
| SH Utvikling AS | | 2018 |
| Shogun Holding AS | Construction | 2005 |
| Siero AS | Construction | 2019 |
| Siero Eiendom AS | Real estate | 2021 |
| Siero Gründer AS | Construction | 2019 |
| Siero Platform AS | Information & communication | 2020 |
| Sigmar AS | | 2024 |
| Silva Utvikling AS | Real estate | 2017 |
| Silveg AS | Professional & scientific | 2023 |
| Simo Technology AS | Information & communication | 2025 |
| Simon Leinums Veg 5 AS | Real estate | 2025 |
| Singstad AS | | 2025 |
| Sisada Invest AS | | 2022 |
| Sjarm Salong AS | Other services | 2015 |
| Skala Fabrikk AS | Manufacturing | 1988 |