| Rahner AS | Transport & logistics | 2016 |
| Rak-Invest AS | Financial services | 2017 |
| Rakon Bygg AS | Construction | 1996 |
| Rale AS | Real estate | 2024 |
| Ram Bil AS | Transport & logistics | 2017 |
| Ram Research AS | | 2022 |
| Ramberg AS | Real estate | 1988 |
| Ramjet AS | Professional & scientific | 2026 |
| Ramlo Glass AS | Construction | 1997 |
| Ramlo Group AS | Real estate | 2021 |
| Ramlo Invest AS | Real estate | 2014 |
| Rammer & Galleri AS | Wholesale & retail | 2006 |
| Ramn AS | Information & communication | 2021 |
| Ramo Holding AS | Real estate | 2006 |
| Ramox AS | Real estate | 1981 |
| Ramp Pub & Spiseri AS | Hospitality | 2002 |
| Ramsfjell AS | Financial services | 2017 |
| Ramsøskar Elektro AS | Construction | 1996 |
| Ran Barges AS | Transport & logistics | 2025 |
| Ran GB AS | Transport & logistics | 2026 |
| Ran GB Assets AS | Transport & logistics | 2025 |
| Randaberg 24 AS | Information & communication | 2019 |
| Randers Holding AS | | 2020 |
| Randi Østborg Ans | Professional & scientific | 1999 |
| Randirose AS | Arts & recreation | 2014 |
| Randulf Valle Naturfordmidling AS | Information & communication | 2021 |
| Ranheim Eiendomsutvikling AS | Real estate | 2007 |
| Ranheim Næringsbygg AS | Real estate | 2017 |
| Ranheim Vestre AS | Real estate | 2015 |
| Ranheimsfjæra Utbyggingsselskap Da | Real estate | 2008 |
| Ranheimsfjæra Utbyggingsselskap II AS | Real estate | 2015 |
| Ranheimsvegen 129 AS | Construction | 2012 |
| Ranheimsvegen 7A AS | Real estate | 2025 |
| Ranheimsveien Eiendom AS | Real estate | 2013 |
| Ranum Piano AS | Wholesale & retail | 1987 |
| Rapunzel AS | Wholesale & retail | 2013 |
| Ras AS | Administrative & support | 2012 |
| Raspire AS | Professional & scientific | 2021 |
| Rat City Film AS | Information & communication | 2026 |
| Ratdal AS | | 2025 |
| Raudåsflata 17 AS | Real estate | 2024 |
| Raus Bar AS | Hospitality | 2016 |
| Ravage Rose Da | Arts & recreation | 2011 |
| Raven AS | Transport & logistics | 2017 |
| Ravnkloa 2025 AS | Administrative & support | 2024 |
| Ravnkloa AS | Real estate | 2023 |
| Ravnklobakken AS | Real estate | 2013 |
| Raw AS | Professional & scientific | 2014 |
| Raw Dancestudio AS | Arts & recreation | 2015 |
| Raw the Freedom Company AS | Information & communication | 2022 |
| Raybar AS | Hospitality | 2017 |
| RB Bygg Og Snekker AS | Construction | 2026 |
| RBK Shop AS | Wholesale & retail | 2015 |
| RBS Invest AS | | 2025 |
| RCL Eiendom AS | Real estate | 2006 |
| Rcln Eiendom AS | | 2024 |
| RD Blikk Og Ventilasjon AS | Construction | 1996 |
| RDG4 AS | Real estate | 2019 |
| Re-Invest Holding AS | Real estate | 2020 |
| Realbo AS | Real estate | 2006 |
| Realfagshjelpen AS | Education | 2016 |
| Realfagsportalen AS | Education | 2022 |
| Realinvest AS | Real estate | 2007 |
| Realinvest Drift AS | Real estate | 2022 |
| Realinvest Kapital AS | Real estate | 2022 |
| Realinvest Tromsø AS | Real estate | 2005 |
| Reality Adventures AS | Arts & recreation | 2018 |
| Reasola AS | Other services | 2007 |
| Rebase Consulting AS | Information & communication | 2026 |
| Rebus Medinvest AS | Real estate | 2014 |
| Reccura Therapeutics AS | Manufacturing | 2005 |
| Rechsteiner Ventures AS | Financial services | 2018 |
| Recruitc AS | Administrative & support | 2018 |
| Recyclelements AS | Professional & scientific | 2023 |
| Red Carpet Travels AS | Administrative & support | 2018 |
| Red Light Racing Team Da | Arts & recreation | 2008 |
| Red Mountains Da | Arts & recreation | 2019 |
| Redevil AS | Professional & scientific | 2018 |
| Redevil Invest AS | Wholesale & retail | 2019 |
| Redicom AS | Administrative & support | 2023 |
| Redux AS | | 2026 |
| Reef Consulting AS | Professional & scientific | 2023 |
| Refco AS | Professional & scientific | 2016 |
| Refit AS | Construction | 2024 |
| Reflector Media AS | Information & communication | 2021 |
| Refsnes Eiendom AS | Real estate | 2022 |
| Refsnes Holding AS | Real estate | 2016 |
| Regala AS | Wholesale & retail | 2005 |
| Regala Vinimport AS | Wholesale & retail | 2025 |
| Reginvest AS | Wholesale & retail | 2012 |
| Regional Kapital Da | Professional & scientific | 2000 |
| Regnskap & Råd AS | Professional & scientific | 2013 |
| Regnskapsfører Paulsen AS | Professional & scientific | 2021 |
| Regnskapshuset Borg AS | Professional & scientific | 2019 |
| Reidar Lien AS | Professional & scientific | 1984 |
| Reidar Olsen Eiendom AS | Real estate | 2016 |
| Reidar Olsen Invest AS | Real estate | 2005 |
| Reimers AS | Wholesale & retail | 1936 |
| Reimers Eiendom AS | Real estate | 2023 |
| Rein B Holding AS | | 2025 |