| Ricaz Oy | Transport & logistics | 2017 |
| RideHigh Oy | Other services | 2024 |
| Rii-Rak Oy | Real estate | 2019 |
| Riitta Mäkitulkkila Ky | Arts & recreation | 1988 |
| Riofin Oy | Hospitality | 2004 |
| Risto Jänkälä Oy | Transport & logistics | 2015 |
| Ritnifjell Innovations OY | Manufacturing | 2022 |
| Riveme Oy | Real estate | 2014 |
| River Forest Oy | Hospitality | 2023 |
| RoRo Oy | Wholesale & retail | 2019 |
| Roadscanners Holding Oy | Professional & scientific | 1998 |
| Roadscanners Instruments Oy | Professional & scientific | 2013 |
| Roadscanners Oy | Professional & scientific | 2013 |
| Rock Juhanna & kumppanit Avoin yhtiö | Hospitality | 2011 |
| Rock the Night Restaurants Oy | Hospitality | 2017 |
| Rod Oy | Education | 2017 |
| Roi Katsastus Oy | Professional & scientific | 2009 |
| Roi Star Oy | Wholesale & retail | 1993 |
| Roi-Osa Oy | Wholesale & retail | 1986 |
| Roi-Rak, Heikki Auvinen Ky | Construction | 1985 |
| Roi-Rast Oy | Professional & scientific | 1988 |
| Roi-Taxi Oy | Transport & logistics | 2016 |
| RoiData Oy | Information & communication | 2025 |
| RoiRoi Oy | Hospitality | 2020 |
| RoiWaRe Oy | Real estate | 2021 |
| Roicon Oy | Construction | 2026 |
| Roifoto Oy | Wholesale & retail | 1997 |
| Roin Autohuolto Ky | Other services | 2012 |
| Roin Ovipinnoite Ky | Manufacturing | 1986 |
| Roin Taksi Oy | Transport & logistics | 2018 |
| Roitema Oy | Other services | 1995 |
| Roivet Oy | Professional & scientific | 2004 |
| Roki Hockey Oy | Arts & recreation | 2002 |
| Roll Outdoors Oy | Administrative & support | 2017 |
| Rollappi Ky | Arts & recreation | 2010 |
| Rollo Rafla Oy | Hospitality | 2023 |
| RolloClean Siivouspalvelut Oy | Administrative & support | 2023 |
| RolloVellu Oy | Professional & scientific | 2024 |
| Rollon Keidas Oy | Hospitality | 2023 |
| Rollon Taksipalvelut Oy | Transport & logistics | 2024 |
| RoofFin Oy | Administrative & support | 2019 |
| Rose Lux Oy | Other services | 2025 |
| Rotemix Oy | Hospitality | 1995 |
| Routa Holding Oy | Financial services | 2025 |
| Routamap Oy | Professional & scientific | 2016 |
| Rova Cottages Oy | Hospitality | 2018 |
| Rova Staff Oy | Transport & logistics | 2022 |
| Rova-Brope Oy | Administrative & support | 1994 |
| Rova-Kiinteistöt Oy | Real estate | 2016 |
| Rova-Marika Oy | Real estate | 1995 |
| Rova-Neon Ky | Professional & scientific | 1990 |
| Rova-Sisustus Group Oy | Wholesale & retail | 2023 |
| Rova-Sisustus Oy | Wholesale & retail | 1951 |
| Rova-Viestin Oy | Wholesale & retail | 1995 |
| RovaCare oy | Health & social care | 2018 |
| RovaLappi Kodit Oy | Construction | 2016 |
| RovaLappi Oy | Real estate | 2013 |
| RovaLappi Rakennus Oy | Construction | 1982 |
| RovaMotor Oy | Wholesale & retail | 2014 |
| RovaSähkö Oy | Construction | 2014 |
| Rovacabana Oy | Real estate | 2023 |
| Rovadia Oy | Manufacturing | 1993 |
| Rovafysio Oy | Health & social care | 2018 |
| Rovahuolto Oy | Other services | 2016 |
| Rovajova-Invest Oy | Financial services | 1993 |
| Rovakairan Metsäpalvelut Oy | Agriculture & fishing | 2026 |
| Rovakairan Verkko Oy | Construction | 2024 |
| Rovamatto Oy | Wholesale & retail | 2007 |
| Rovanapa Oy | Real estate | 2003 |
| Rovaniemen Aittatien kymppikiinteistöt Oy | Real estate | 1999 |
| Rovaniemen Ajoharjoittelurata Oy | Education | 2008 |
| Rovaniemen Auto ja Pelti kommandiittiyhtiö | Other services | 1983 |
| Rovaniemen Bowling Shop Ky | Arts & recreation | 1981 |
| Rovaniemen Citytaksit Oy | Transport & logistics | 2013 |
| Rovaniemen Ekoteam Oy | Water & waste | 1980 |
| Rovaniemen Eläinkeskus Oy | Professional & scientific | 2015 |
| Rovaniemen Eläinklinikka Oy | Professional & scientific | 1989 |
| Rovaniemen FAST-palvelu Oy | Transport & logistics | 2021 |
| Rovaniemen Finnturkis Viitala Ky | Wholesale & retail | 1985 |
| Rovaniemen Fysio- ja Lääkäripalvelu ACL Oy | Health & social care | 2004 |
| Rovaniemen Hammasapu Oy | Health & social care | 2023 |
| Rovaniemen Helikopteripalvelu Oy | Transport & logistics | 2012 |
| Rovaniemen Hevospalvelut Ky | Agriculture & fishing | 2007 |
| Rovaniemen Insinööritoimisto Oy | Professional & scientific | 1981 |
| Rovaniemen Isännöinti Oy | Real estate | 1994 |
| Rovaniemen Kaikkoset Oy | Real estate | 1996 |
| Rovaniemen Kalla Oy | Hospitality | 2009 |
| Rovaniemen Kauneusateljee Oy | Other services | 1995 |
| Rovaniemen Kehitys Oy | Professional & scientific | 2005 |
| Rovaniemen Keräyspaperi Ky | Wholesale & retail | 1984 |
| Rovaniemen Keskus-Burger Oy | Hospitality | 2001 |
| Rovaniemen Keskuspesula Oy | Other services | 1963 |
| Rovaniemen Kiinteistönotariaatti Oy | Real estate | 1995 |
| Rovaniemen Kodinkonehuolto Oy | Other services | 1986 |
| Rovaniemen Kosmetiikkapiste Ky | Other services | 2016 |
| Rovaniemen Kotihoito Oy | Health & social care | 2024 |
| Rovaniemen Kotipesä Oy | Real estate | 2007 |
| Rovaniemen Kotivideo Oy | Administrative & support | 1996 |
| Rovaniemen Kuntotarkastus Oy | Professional & scientific | 2024 |
| Rovaniemen Kymppi Oy | Administrative & support | 2007 |