| Raanapojat Oy | Manufacturing | 1981 |
| Race World oy | Other services | 2025 |
| Racing Rescue Finland Oy | Health & social care | 2012 |
| RadheKrishna Group Oy | Transport & logistics | 2026 |
| Rageluola Oy | Arts & recreation | 2022 |
| Rahabalanssi Oy | Education | 2020 |
| Raiko Investment Company Oy | Health & social care | 2016 |
| Raimon Paja Oy | Other services | 2018 |
| Rajamäen Palaveri Oy | Hospitality | 2024 |
| Rakcha Oy | Hospitality | 2025 |
| Rakennus Curone Oy | Construction | 2021 |
| Rakennus Jukka Jalonen Oy | Construction | 2004 |
| Rakennus Laivamaa Oy | Construction | 2026 |
| Rakennus Lydman Oy | Construction | 1976 |
| Rakennus Matti Salento Oy | Construction | 1988 |
| Rakennus Muuri Oy | Construction | 2012 |
| Rakennus Oy Antti J. Ahola | Construction | 1996 |
| Rakennus Padinki&Jaatinen OY | Construction | 2015 |
| Rakennus ja Huoltopalvelu Kaiku Oy | Construction | 2019 |
| Rakennus ja Saneeraus Siik Oy | Construction | 2024 |
| Rakennus- ja saneeraus Lamur Oy | Construction | 1989 |
| Rakennuskemia Oy | Wholesale & retail | 1988 |
| Rakennuskonsultointi Jani Göös Oy | Real estate | 2016 |
| Rakennusliike Cemrak Oy | Construction | 2006 |
| Rakennusliike JaMarak Oy | Construction | 2006 |
| Rakennusliike KH-rak Oy | Construction | 2024 |
| Rakennusliike Kilu & Kilu Oy | Construction | 1997 |
| Rakennusliike Lampikoski Oy | Construction | 2005 |
| Rakennusliike Marka Ky | Construction | 2001 |
| Rakennusliike Natunen Oy | Construction | 1991 |
| Rakennusliike Paulberg Oy | Construction | 2014 |
| Rakennuspalvelu HO-PE Oy | Construction | 2022 |
| Rakennuspalvelu JU-ST Oy | Construction | 2014 |
| Rakennuspalvelu Kari Käyhkö Oy | Construction | 1990 |
| Rakennuspalvelu Pesonen Oy | Construction | 2018 |
| Rakennuspalvelut Ringas Oy | Construction | 2025 |
| Rakennustoimisto 4T Oy | Professional & scientific | 2009 |
| Rakennuttajayhtiö K2 Oy | Construction | 2016 |
| Raksanjesse Oy | Construction | 2024 |
| Rakteekki Ky | Professional & scientific | 1994 |
| Ramifix Oy | Construction | 2016 |
| Ramoy Oy | Other services | 2012 |
| Ranagement Oy | Construction | 2013 |
| Rantalainen Audit Oy | Professional & scientific | 1987 |
| Rantalainen-Yhtiöt Oy | Professional & scientific | 1985 |
| Rantamäki Advisors oy | Professional & scientific | 2016 |
| Rantanplan Oy | Professional & scientific | 1992 |
| Rasamo Creations Oy | Arts & recreation | 2021 |
| Rastolli Oy | Construction | 2013 |
| Ratko oy | Professional & scientific | 2026 |
| Raudan Herrat Oy | Manufacturing | 2019 |
| Rauke Oy | Manufacturing | 1986 |
| Rauta-Aittamaa Oy | Wholesale & retail | 2019 |
| Rauta-Market Haaranen Oy | Wholesale & retail | 1956 |
| Ravintola AnMa Oy | Hospitality | 2013 |
| Ravintola Pirunsaari katukeittiö Oy | Hospitality | 2022 |
| Ravkon Oy | Hospitality | 1989 |
| ReSys Oy | Professional & scientific | 2005 |
| Redend Oy | Administrative & support | 2021 |
| ReflectorSenior Oy | Health & social care | 2026 |
| Reijo Aaltonen Oy | Financial services | 1978 |
| Reijocon Oy | Professional & scientific | 2018 |
| Reijonen Service OY | Hospitality | 2020 |
| Reka Industrial Oyj | Financial services | 1987 |
| Reka Kaapeli Oy | Manufacturing | 1997 |
| Rekasal Oy | Administrative & support | 2017 |
| Rekbot Oy | Professional & scientific | 2023 |
| Rekka Puhtaaksi Hyvinkää Oy | Other services | 2025 |
| Reliq Pemp Oy | Manufacturing | 2024 |
| Remonttipalvelu BA Oy | Construction | 2023 |
| Removec Oy | Construction | 2022 |
| Rengas Uusimaa Oy | Wholesale & retail | 2018 |
| Rengaskunkku Oy | Other services | 2017 |
| Renoair Ky | Administrative & support | 1998 |
| Rentex Suomi Oy | Transport & logistics | 2021 |
| Rentto Oy | Real estate | 2016 |
| Renvall Nela Oy | Administrative & support | 2023 |
| Resido Partners Oy | Real estate | 2025 |
| Resto Kebab House Oy | Hospitality | 2022 |
| Reunarinne Oy | Real estate | 1983 |
| Revt Isännöinti Oy | Real estate | 2018 |
| Ribat Oy | Construction | 2008 |
| RidasRahti Oy | Transport & logistics | 2021 |
| Ridasaho Oy | Wholesale & retail | 1990 |
| Ridasjärven Kiinteistöt Oy | Real estate | 2006 |
| Ridasjärven Kuljetus Oy | Transport & logistics | 1990 |
| Ridasjärventien Nosto ja Kuljetus Sorvari Oy | Transport & logistics | 1992 |
| Ridaspuu Oy | Agriculture & fishing | 2026 |
| Riihisillan asunnot Oy | Real estate | 1993 |
| Rikara Oy | Financial services | 2024 |
| Rikurantti Oy | Professional & scientific | 2016 |
| Rimko Oy | Manufacturing | 1990 |
| Rimma Hold Oy | Financial services | 2018 |
| Rinne Development Oy | Real estate | 2024 |
| Rinnetiili Oy | Real estate | 1996 |
| Riob Oy | Real estate | 1980 |
| Ritarco Oy | Real estate | 1998 |
| Ritasjärven Vesiosuuskunta | Water & waste | 2009 |
| River Ranch Oy | Arts & recreation | 2026 |
| RoSe 4u Oy | Arts & recreation | 2015 |