| Randøyane Avløp SA | Water & waste | 2009 |
| Rani Invest AS | Real estate | 2021 |
| Rank NR. 1 AS | Information & communication | 2012 |
| Rannestad System Design AS | Professional & scientific | 1996 |
| Rannfrid Rasmussen Investment AS | Real estate | 1964 |
| Ranto AS | Real estate | 2005 |
| Rar Holding AS | | 2026 |
| Rare Adventure AS | Financial services | 2024 |
| Rare Opportunity AS | | 2025 |
| Rare Produksjoner Ans | Professional & scientific | 2010 |
| Rasch AS | Administrative & support | 2018 |
| Rasch Utleie AS | Administrative & support | 2024 |
| Rashica Invest AS | Real estate | 2024 |
| Rask Rehab AS | Health & social care | 2023 |
| Rasmus Tallaksen AS | Wholesale & retail | 1975 |
| Rasmussen & Hystad AS | | 2024 |
| Rasmussen AS | | 2023 |
| Rasmussen Invention AS | Professional & scientific | 2014 |
| Rasmussen Maritime Design AS | Professional & scientific | 2014 |
| Rasmussengruppen AS | Professional & scientific | 1929 |
| Rasnorman Holding AS | Real estate | 2022 |
| Ratobi Invest AS | | 2025 |
| Raudetjønn Invest AS | Construction | 2021 |
| Raustøl Bygg Og Eiendom AS | Real estate | 2003 |
| Rave Holding AS | Real estate | 2023 |
| Ravine Sykler AS | Wholesale & retail | 2026 |
| Ravnaas AS | Professional & scientific | 2023 |
| Ravnaas Gruppen AS | Real estate | 2024 |
| Ravnaas Holding AS | Real estate | 2013 |
| Ravnaas Immobiliare AS | Real estate | 2021 |
| Ravnaas Rekruttering & Utvikling AS | Professional & scientific | 2014 |
| Ravnura Holding AS | Transport & logistics | 2011 |
| RBL Invest AS | | 2021 |
| RBR AS | Administrative & support | 2008 |
| RCG Invest AS | Financial services | 2005 |
| RD Boring Og Sprengning AS | Construction | 2007 |
| RDC Golf AS | Professional & scientific | 2020 |
| Re+Circle AS | Professional & scientific | 2017 |
| Re-Fa AS | Real estate | 2005 |
| Re-Locate AS | Professional & scientific | 2016 |
| Reach Mobile AS | Real estate | 2017 |
| Reactor Studio AS | Information & communication | 2015 |
| Real Estatia AS | Real estate | 2003 |
| Real Indisk -Restaurant & Bar AS | Hospitality | 2021 |
| Realia Utvikling AS | Real estate | 2005 |
| Realiser AS | Wholesale & retail | 2017 |
| Realtime Production AS | Wholesale & retail | 2022 |
| Reb Kapital AS | | 2020 |
| Reb&Dan Invest AS | | 2025 |
| Rebco AS | Professional & scientific | 2021 |
| Rebica Holding AS | Financial services | 2017 |
| Reboot AS | Information & communication | 2022 |
| Rebus Dekkoutlet AS | Wholesale & retail | 2024 |
| Recoletos AS | | 2021 |
| Recto AS | Wholesale & retail | 2016 |
| Red Rock AS | Manufacturing | 2022 |
| Red Rock Solutions AS | Information & communication | 2009 |
| Redpoint Diagnostics AS | Health & social care | 2024 |
| Reefers Norway AS | Transport & logistics | 2024 |
| Reemers Offshore & Energy Services AS | Energy | 2024 |
| Reev AS | Real estate | 2013 |
| Reex AS | Real estate | 2005 |
| Refill Holding AS | | 2025 |
| Refstie Holding AS | | 2013 |
| Region Eiendom AS | Wholesale & retail | 2020 |
| Regnbuer AS | Education | 2005 |
| Regnskap Kristiansand AS | Professional & scientific | 2020 |
| Regnskap Og Bedriftsrådgivning AS | Professional & scientific | 2015 |
| REGNSKAP-24 AS | Professional & scientific | 2025 |
| Regnskapsavdelingen AS | Professional & scientific | 2013 |
| Regnskapsbyrået Mer AS | Professional & scientific | 2022 |
| Regnskapsrobot AS | Professional & scientific | 2020 |
| Rehab Sør AS | Construction | 2020 |
| Reidar Svendsen Design AS | Manufacturing | 1995 |
| Reignite AS | Professional & scientific | 2025 |
| Reinhardsen Invest AS | Professional & scientific | 2017 |
| Reinhardt Holding AS | Real estate | 1991 |
| Reinhardtsen Eiendom AS | Real estate | 2022 |
| Reinhartsen & Co AS | Wholesale & retail | 1980 |
| Reinhartsen AS | Transport & logistics | 2014 |
| Reinhartsen Basar AS | Wholesale & retail | 2010 |
| Reinhartsen Engros AS | Manufacturing | 2010 |
| Reinhartsen Holding AS | Manufacturing | 2010 |
| Reinhartsen Seafood AS | Real estate | 2019 |
| Reiseløst Da | Education | 2011 |
| Reisemagasinet AS | Wholesale & retail | 1991 |
| Rek Innvest AS | | 2023 |
| Rekkverk & Montasje AS | Construction | 2017 |
| Rekkverkpartner AS | Construction | 2025 |
| Reklamestasjonen AS | Manufacturing | 2015 |
| Reko Invest AS | Financial services | 2008 |
| Rekom Drift Kristiansand AS | Hospitality | 2022 |
| Rekom Event Norge AS | Hospitality | 2022 |
| Rekom Group Norge AS | Hospitality | 2018 |
| Rekom Norge AS | Professional & scientific | 2015 |
| Rekom Norge Drift 25 AS | Hospitality | 2022 |
| Rekom Norge Drift 27 AS | Hospitality | 2007 |
| Rekom R&D Nuf | Construction | 2018 |
| Rekom RD Norge AS | Construction | 2022 |
| Rekom Tromsø AS | Hospitality | 2016 |