| Reputation in Mind AS | Professional & scientific | 2010 |
| Resop AS | Professional & scientific | 2010 |
| Respz Holding AS | Financial services | 2007 |
| Ressursmerking AS | Manufacturing | 2023 |
| Restaurant Scandinavie AS | Hospitality | 1996 |
| Restaurantdrift Keiser Wilhelmsgate 23 AS | Hospitality | 2015 |
| Restorfx Ålesund AS | Other services | 2023 |
| Retailnetworks AS | Information & communication | 2012 |
| Reto AS | Professional & scientific | 2014 |
| Rett Fra Havet AS | Wholesale & retail | 2020 |
| Retura Møre AS | Water & waste | 2005 |
| Reve Eiendom AS | Real estate | 2016 |
| Revisor Nordstrand AS | Professional & scientific | 2019 |
| Revizor AS | Professional & scientific | 2018 |
| Rewaco AS | Manufacturing | 1991 |
| Rewaco Eiendom AS | Real estate | 2008 |
| Rewaste AS | Water & waste | 2021 |
| Rewaste Concept AS | Water & waste | 2026 |
| Rewaste Holding AS | | 2026 |
| Rforberg AS | | 2026 |
| Rgi AS | Professional & scientific | 2016 |
| RH Industri AS | | 2020 |
| RH Seafood Investments AS | | 2025 |
| RH Topco AS | | 2025 |
| Rh-Invest AS | Real estate | 1962 |
| Rib Excursions AS | Administrative & support | 2026 |
| Rico Eiendomsutvikling AS | Real estate | 2011 |
| Rico Holding AS | Real estate | 2017 |
| Rico International Corp AS | Real estate | 1997 |
| Rico Realestate AS | Real estate | 2011 |
| Rid AS | Manufacturing | 2001 |
| Rieve Kapital AS | Manufacturing | 2017 |
| Rig Consult AS | Professional & scientific | 2021 |
| Rig Supporter AS | Transport & logistics | 2024 |
| Riid Advokatfirma AS | Professional & scientific | 2018 |
| Riksheim Consulting AS | Professional & scientific | 1991 |
| Rim Invest AS | Financial services | 2018 |
| Rim Invest II AS | | 2020 |
| Rimsmed AS | | 2021 |
| Rina Holding AS | | 2024 |
| Rinco AS | | 2012 |
| Rindal Eiendom AS | Real estate | 2021 |
| Rindeck AS | Energy | 2018 |
| Ringstad Trading AS | Transport & logistics | 2022 |
| Ringstadsætra Hyttegrend AS | Real estate | 2010 |
| Risenfashionco AS | Professional & scientific | 2025 |
| Rishaug Holding AS | | 2026 |
| Risnes AS | Professional & scientific | 2025 |
| Rma Holding AS | Wholesale & retail | 2005 |
| Rmu Holding AS | Real estate | 2021 |
| RNC Invest AS | Professional & scientific | 2017 |
| RNJ Invest AS | Financial services | 2016 |
| Roalden Hytteområde AS | Real estate | 2020 |
| Roalden Skigard AS | Real estate | 2018 |
| Roaldsand Eiendoms Renovering AS | Construction | 2022 |
| Robco Holding AS | Information & communication | 2023 |
| Robel AS | Real estate | 2005 |
| Robi Holding AS | Real estate | 2023 |
| Robinson AS | Wholesale & retail | 1983 |
| Robust Gruppen AS | | 2025 |
| Roger & Stian Consulting Ans | Wholesale & retail | 2003 |
| Roger Howden AS | Professional & scientific | 2024 |
| Rogne Aut Trafikkskule AS | Education | 1999 |
| Roksvaag Consulting AS | | 2020 |
| Rolf Anders Håberg AS | | 2023 |
| Rollo Invest AS | Wholesale & retail | 2021 |
| Rom AS | Professional & scientific | 2000 |
| Romsdal Kjøkken AS | Wholesale & retail | 2021 |
| Romundstad Holding AS | Health & social care | 2022 |
| Ronaldervik AS | | 2020 |
| Ronja Capital AS | Hospitality | 2020 |
| Ronja Capital Investment AS | | 2024 |
| Ronja Eiendom AS | Real estate | 2019 |
| Ronny Hamre Invest AS | | 2019 |
| Room Holding AS | | 2025 |
| Room Tjenester AS | Information & communication | 2026 |
| Rosetmarka Utvikling AS | Real estate | 2014 |
| Rotek Holding AS | | 1989 |
| Rotnes Invest AS | | 2017 |
| Rotsabieng AS | Hospitality | 2014 |
| Rovde Holding AS | Real estate | 2022 |
| Roy Hessen AS | Transport & logistics | 2005 |
| Royal Citytrain Ålesund AS | Administrative & support | 2024 |
| Royal Tur Reiser AS | Transport & logistics | 2018 |
| RP Barli AS | Professional & scientific | 2025 |
| RPL AS | Real estate | 2025 |
| RRH Invest AS | Professional & scientific | 2022 |
| RS Finans AS | Wholesale & retail | 1980 |
| RS Montering AS | Construction | 2024 |
| RS Renovering AS | Construction | 2025 |
| RS Retail AS | Wholesale & retail | 2020 |
| Rs-Revisjon AS | Professional & scientific | 2007 |
| Rse AS | Administrative & support | 2024 |
| RSH Capital AS | Financial services | 2008 |
| Rundskue AS | | 2022 |
| Rundskue Invest AS | Wholesale & retail | 2000 |
| Rune Forberg Holding AS | | 2026 |
| Rune Hagen Holding AS | Professional & scientific | 2005 |
| Rune Sulebakk AS | Wholesale & retail | 1982 |
| Runefoto AS | Professional & scientific | 2024 |