| PTM Asennus Oy | Construction | 2018 |
| PadelTehdas Oy | Arts & recreation | 2020 |
| Pajun Putki Oy | Construction | 2023 |
| Palen Kaivuu Oy | Construction | 2024 |
| Paros Finland Oy | Arts & recreation | 2005 |
| Partrex Oy | Wholesale & retail | 2025 |
| Parturi-kampaamo Salon Rina Oy | Other services | 2023 |
| Parturikampaamo Samika Oy | Other services | 2024 |
| Patova Kiinteistöt Oy | Real estate | 2023 |
| Pehtoorin Mehtä Oy | Agriculture & fishing | 2023 |
| Peikon Pensselit Oy | Construction | 2018 |
| Peltiset Oy | Construction | 2020 |
| Perhekoti Punatulkku Ky | Health & social care | 2024 |
| Petel Oy | Professional & scientific | 2019 |
| Piharatamo Oy | Transport & logistics | 2006 |
| Pink Style Oy | Wholesale & retail | 2023 |
| Pirjon Pakari Nurmijärvi Oy | Manufacturing | 2010 |
| Pirne Oy | Agriculture & fishing | 2022 |
| Pispalan Toimet Oy | Financial services | 2026 |
| Pizza Capri Oy | Hospitality | 2009 |
| Pohjamo Oy | Agriculture & fishing | 2007 |
| Point Production Ky | Professional & scientific | 2005 |
| Polttopuucenter Oy | Construction | 1990 |
| Premium Solutions Oy | Wholesale & retail | 1990 |
| Preston Rentals Finland Oy | Construction | 2000 |
| Pro Gym Oy | Arts & recreation | 2019 |
| Prohalli Oy | Real estate | 2023 |
| Psyche Oy Aurinkorinne | Health & social care | 2008 |
| Psykologipalvelu Venni Oy | Health & social care | 2020 |
| Punamullantien jätevesiosuuskunta | Water & waste | 2007 |
| Puusepänliike Humalajoki Ky | Manufacturing | 1982 |
| Pyramis Oy | Professional & scientific | 2014 |
| Pärnel Oy | Construction | 2019 |
| R&T Kalliokoski Oy | Financial services | 2026 |
| R.J.N-Trans Oy | Transport & logistics | 2009 |
| RA Siivous Oy | Administrative & support | 2025 |
| RAINIE Invest Oy | Real estate | 1989 |
| RE Medicen Oy | Health & social care | 2011 |
| RJJ Rakennus Ky | Construction | 2009 |
| Rjn-Services OY | Transport & logistics | 1994 |
| RL-Kaupat Oy | Administrative & support | 2017 |
| RS Kuljetus Oy | Transport & logistics | 1988 |
| RTO - Ympäristö Oy | Professional & scientific | 1994 |
| Raalan Rakennuspalvelu Ky | Construction | 2007 |
| Rak-huolto oy | Other services | 2020 |
| Rakennus Siikanen Oy | Construction | 2020 |
| Rakennus Sääksjärvi Oy | Construction | 1991 |
| Rakennus-Pakkala Oy | Construction | 2004 |
| Rakennusliike Kaareva Oy | Construction | 2020 |
| Rakennusliike Tekson Oy | Construction | 2005 |
| Rakennuspalvelu Polvinen Oy | Construction | 2016 |
| Rakennuspalvelu VVE Oy | Construction | 2014 |
| Rakkaudesta lukuihin Oy | Professional & scientific | 2023 |
| Rapiditaxi Oy | Transport & logistics | 1986 |
| Ratatek Oy | Construction | 2008 |
| Rauta-Invest Oy | Real estate | 1989 |
| Rauta-Jokke Oy | Real estate | 1976 |
| Rautakeskus Group Oy | Wholesale & retail | 2024 |
| Rautakontkanen Oy | Wholesale & retail | 1979 |
| Rawian Oy | Professional & scientific | 2011 |
| RealRent Oy | Manufacturing | 2008 |
| Riihimäki Shooting Center Oy | Arts & recreation | 2017 |
| Riihipiha Oy | Administrative & support | 2025 |
| Road Traffic Services Virta Oy | Transport & logistics | 2021 |
| Roban Tadex Oy | Construction | 2019 |
| Roc-Leasing Oy | Administrative & support | 2021 |
| Roc-Service Oy | Manufacturing | 2005 |
| Rock Hard Oy | Construction | 2026 |
| Rock, Wind & Energy Oy | Construction | 2020 |
| RockStep Invest KOY | Real estate | 2022 |
| Rogue Revolver Oy | Professional & scientific | 2011 |
| Rohdostukku Elämää Oy | Wholesale & retail | 2005 |
| Roipet Oy | Financial services | 2019 |
| Ronimax oy | Hospitality | 2018 |
| Roweikko Oy | Financial services | 2022 |
| Ruokahyrrä Oy | Financial services | 2009 |
| Ruokataukotupa oy | Hospitality | 2023 |
| Ruukinpuiston Pysäköinti Oy | Real estate | 1990 |
| Ruusurengas Oy | Wholesale & retail | 2014 |
| SAI Limited Finland Oy | Information & communication | 2020 |
| Sariel Ky | Wholesale & retail | 2004 |
| SATA Innovations Oy | Professional & scientific | 2010 |
| SJH Yhtiö Oy | Construction | 2021 |
| SLA Group Oy | Financial services | 2010 |
| SO Animal Training Oy | Other services | 2019 |
| STW Group Oy | Wholesale & retail | 2017 |
| Syn Ack Avoin Yhtiö | Information & communication | 2009 |
| Sa-Tu Rak Oy | Construction | 2015 |
| SaNeMa Oy | Other services | 2015 |
| SaSa Sähkö Oy | Construction | 2026 |
| Saanan Eläinkoulutuspalvelut Oy | Other services | 2021 |
| Saferoad Services AB, Suomen sivuliike | Construction | 2024 |
| Sainio-Cleaning Oy | Wholesale & retail | 1989 |
| Salesko Oy | Professional & scientific | 2022 |
| Salhalli Oy | Real estate | 2020 |
| Salhydro Oy | Wholesale & retail | 1989 |
| Salkano Oy | Financial services | 2021 |
| Salmenpojat Oy | Construction | 2025 |
| Salor Oy | Professional & scientific | 2022 |
| Sami Kirkkari Ky | Construction | 2026 |