| Rakennuttajatoimisto Tiainen Oy | Real estate | 2023 |
| Rakentajalle.com Finland | Construction | 2022 |
| Rakentajapalvelu Ismo Noutia Oy | Construction | 1996 |
| Rakento Oy | Professional & scientific | 2014 |
| Raki&ta Oy | Professional & scientific | 2024 |
| Rakka Works & Spaces Oy | Professional & scientific | 2019 |
| Rakkala Oy | Construction | 2018 |
| Rakkauden opaskoirat avoin yhtiö | Arts & recreation | 2015 |
| Rakkiluosto Oy | Real estate | 1990 |
| Rakla Tampere Oy | Manufacturing | 2009 |
| Rakmo Oy | Construction | 2017 |
| Raksa Appi Oy | Information & communication | 2024 |
| Raksa Partners Oy | Construction | 2021 |
| Raksajelppi Oy | Administrative & support | 2004 |
| Raksalog Oy | Construction | 2007 |
| Raksapro Oy | Construction | 2025 |
| Raksateam Oy | Construction | 2012 |
| Raksaukko Oy | Construction | 2021 |
| Raksawood Oy | Wholesale & retail | 2025 |
| Raksult Oy | Real estate | 2013 |
| Rakton Oy | Construction | 2016 |
| Rakumax Oy | Construction | 2025 |
| Rakval Oy | Professional & scientific | 2026 |
| Ralkon Oy | Professional & scientific | 2020 |
| Ralli Oy | Professional & scientific | 1985 |
| Ralos Oy | Wholesale & retail | 2017 |
| Ralsoft Oy | Information & communication | 2025 |
| Rambas Oy | Construction | 2022 |
| Ramentic Oy | Manufacturing | 2025 |
| Rami Hanafi Photography Oy | Professional & scientific | 2006 |
| Ramish Oy | Hospitality | 2017 |
| Ramram Lahjatavarat Oy | Wholesale & retail | 2006 |
| Ramu Group Oy | Financial services | 2025 |
| Randz Oy | Professional & scientific | 2014 |
| Ranella Oy | Information & communication | 1990 |
| Ranes Oy | Professional & scientific | 2025 |
| Ranger PC Oy | Wholesale & retail | 2025 |
| Rango Oy | Financial services | 2019 |
| Ranita Oy | Financial services | 1996 |
| Ranta Corporation Oy | Transport & logistics | 2021 |
| Ranta-Tampellan Putkikeräys Oy | Water & waste | 2017 |
| Ranta-Tampellan Sauna Oy | Other services | 2026 |
| Rantahermannin vesiosuuskunta | Water & waste | 2020 |
| Rantakari Capital Oy | Financial services | 2026 |
| Rantakari GameTime Company Oy | Wholesale & retail | 2022 |
| Rantala Build & Invest Oy | Construction | 2026 |
| Rantala Training Protocol Oy | Arts & recreation | 2017 |
| Rantaniitun hoivapalvelut Oy | Health & social care | 1999 |
| Rantaperkiön Autotalo Oy | Wholesale & retail | 2002 |
| Rantatien Pikahuolto Oy | Other services | 2008 |
| Rantec Oy | Professional & scientific | 2024 |
| Rantocom Oy | Information & communication | 2017 |
| Ranua Solaris Oy | Professional & scientific | 2015 |
| Rappaustekniikka Laurell Oy | Construction | 2001 |
| Rapport kuluttajasisällöt Oy | Information & communication | 2014 |
| Rapu Events Oy | Administrative & support | 2025 |
| RasaKing Fried Chicken Ky | Hospitality | 2024 |
| Rasmikal Oy | Financial services | 2024 |
| Rasse Holding Oy | Financial services | 2023 |
| Rasulan Taksit Oy | Transport & logistics | 2018 |
| RateRoc Oy | Professional & scientific | 2019 |
| Ratina Autopesu Oy | Other services | 2026 |
| Ratinan Asuntopalvelu Oy | Real estate | 2021 |
| Ratinan Tenniskentät Oy | Arts & recreation | 1984 |
| Ratinan Terveys Oy | Health & social care | 2021 |
| Ratinanrannan Pysäköinti Oy | Real estate | 1997 |
| Ratkaisun Askeleet Oy | Health & social care | 2019 |
| Rattoria Ryyti Oy | Hospitality | 2025 |
| Rauhala visuals oy | Arts & recreation | 2021 |
| Raumacon Oy | Wholesale & retail | 2008 |
| Rauman Vesi- ja Maanrakennus Oy | Real estate | 1994 |
| Raunet oy | Construction | 2023 |
| Raunomo Oy | Manufacturing | 1991 |
| Rauta 37 Oy | Manufacturing | 1997 |
| Rauta Enqvist Oy | Wholesale & retail | 2016 |
| Rautahermo Oy | Health & social care | 2025 |
| Rautalin Consulting Oy | Professional & scientific | 2023 |
| Rautamesta Oy | Wholesale & retail | 2012 |
| Rautasoini Oy | Water & waste | 2013 |
| Rautatienkadun Pee Ee Oy | Financial services | 2021 |
| Ravake Oy | Arts & recreation | 2022 |
| Raven Tree Oy | Administrative & support | 1977 |
| Raventure Oy | Financial services | 2024 |
| Ravine Interactive Oy | Information & communication | 2023 |
| Ravintola Adeli Oy | Hospitality | 2021 |
| Ravintola Asahi Oy | Hospitality | 2017 |
| Ravintola Astor Oy | Hospitality | 1988 |
| Ravintola Drina Oy | Hospitality | 2022 |
| Ravintola Eväs avoin yhtiö | Hospitality | 2022 |
| Ravintola F9 Oy | Hospitality | 2020 |
| Ravintola GPS Oy | Hospitality | 2025 |
| Ravintola Galleria Oy | Hospitality | 2015 |
| Ravintola Haitari Avoin yhtiö | Hospitality | 2012 |
| Ravintola Heinätori Oy | Hospitality | 1994 |
| Ravintola Im Aroi Ami Oy | Hospitality | 2008 |
| Ravintola India Oy | Hospitality | 2026 |
| Ravintola Indian Part avoin yhtiö | Hospitality | 2024 |
| Ravintola Kordon Oy | Hospitality | 2022 |
| Ravintola LiV Oy | Hospitality | 2018 |
| Ravintola Nekalan Helmeri Ky | Hospitality | 1989 |