| Pyylin Sähkö Oy | Professional & scientific | 2013 |
| Pyynikin Brewery Restaurants Oy | Hospitality | 2017 |
| Pyynikin Brewing Oy | Manufacturing | 2000 |
| Pyynikin Helmi Oy | Health & social care | 2021 |
| Pyynikin Hiekkarannat Oy | Hospitality | 2018 |
| Pyynikin Munkkikahvila Oy | Hospitality | 2006 |
| Pyynikin Munkkikahvila Oy Kauppahalli | Hospitality | 2020 |
| Pyynikin ShangriLa Oy | Other services | 2025 |
| Pyynikin eläinlääkärit Oy | Professional & scientific | 2019 |
| Pyynikin kesäteatteri Oy | Arts & recreation | 2022 |
| Pyynikin matkailupalvelut Oy | Administrative & support | 2010 |
| Pyynikinranta Housing Holding Oy | Real estate | 2020 |
| Pyynikinranta Kamreeri Holding Oy | Real estate | 2020 |
| Pyynikinranta Kisälli Holding Oy | Real estate | 2020 |
| Pyynikki Kiinteistöt Oy | Construction | 2023 |
| Pyyrest Oy | Hospitality | 2006 |
| Pyörittäjä Oy | Hospitality | 2006 |
| Pyörremedia Oy | Professional & scientific | 2023 |
| Pyörä&Paikka oy | Wholesale & retail | 2024 |
| Pyörähuolto M&M Oy | Other services | 2012 |
| Pyöräsuomi Oy | Wholesale & retail | 2017 |
| Pyörätaikurit Oy | Other services | 2005 |
| Päijät-Putki Oy | Construction | 2007 |
| Päiväkoti Kiekkari Oy | Education | 2010 |
| Päiväkoti Kullannuppu Oy | Education | 2021 |
| Päiväkoti Oravametsä Oy | Education | 2012 |
| Päivän Lehti Digital Oy | Information & communication | 2016 |
| Päivärinta Holding Oy | Financial services | 2026 |
| Pälkäneen Alanko Oy | Real estate | 1995 |
| Pälkäneen Veneveistämö Osakeyhtiö | Manufacturing | 2020 |
| Pärrinkoski Group Oy | Financial services | 2020 |
| Pättiniemi Oy | Professional & scientific | 2022 |
| Pättäri Oy | Hospitality | 2026 |
| Pää & Häntä Oy | Education | 2014 |
| Pääkaupunkiseudun Hankekehitys Oy | Construction | 1988 |
| Pääniääni Oy | Information & communication | 2023 |
| Pääry Oy | Construction | 2025 |
| Pääsiälän Osakeyhtiö | Real estate | 1957 |
| Pölkki & Sons Oy | Professional & scientific | 2010 |
| Pöllö Capital Oy | Financial services | 2024 |
| PölyHaukat Oy | Other services | 2020 |
| Q-Partners Oy | Information & communication | 1996 |
| QA Plus Oy | Administrative & support | 2024 |
| QEAR Digital Oy | Information & communication | 2025 |
| QEAR Rakennus Oy | Construction | 2025 |
| QJ Capital Oy | Financial services | 2025 |
| QMClouds Oy | Information & communication | 2018 |
| Qbitech Oy | Information & communication | 2006 |
| Qentinel Oy | Information & communication | 2011 |
| Qingshan Oy | Hospitality | 2022 |
| Qizzy Oy | Information & communication | 2024 |
| Qtalo Oy | Wholesale & retail | 2024 |
| Quaestus Oy | Real estate | 2016 |
| Qualicom Ky | Hospitality | 2003 |
| Quality EArchitecture QEAR Oy | Professional & scientific | 2022 |
| Quality Rental Service Oy | Administrative & support | 2021 |
| Quanscient Oy | Information & communication | 2021 |
| Quantum Energy Oy | Energy | 2026 |
| Quattroservices Tampere Oy | Construction | 2014 |
| Quetbird Oy | Manufacturing | 1995 |
| QuickCab Oy | Transport & logistics | 2024 |
| Quinta Oy | Real estate | 2023 |
| Quje Oy | Professional & scientific | 2019 |
| Quotalogic Oy | Information & communication | 2023 |
| Quuma Oy | Wholesale & retail | 1995 |
| Quux Oy | Information & communication | 2016 |
| Quva Oy | Information & communication | 2010 |
| R DRIFT Oy | Wholesale & retail | 2024 |
| R-Finanssi Oy | Construction | 2025 |
| R-Go Instruments Oy | Manufacturing | 2022 |
| R-Service Oy | Other services | 2022 |
| R-tilipalvelu Oy | Professional & scientific | 2011 |
| R. Emilia Oy | Other services | 2024 |
| R. Hietanen Oy | Real estate | 1989 |
| R. ja L. Kangasniemi Ky | Wholesale & retail | 1961 |
| R.C. Rakennus center Ky | Construction | 1987 |
| R.M. Heino Oy | Wholesale & retail | 1989 |
| R.S Sales Oy | Professional & scientific | 2026 |
| RA-Suunnittelu Group Oy | Professional & scientific | 2012 |
| RAE Engineering Oy | Professional & scientific | 2024 |
| RAFADVEN 1 Oy | Energy | 2024 |
| RAFADVEN 10 Oy | Energy | 2025 |
| RAFADVEN 2 Oy | Energy | 2024 |
| RAFADVEN 3 Oy | Energy | 2024 |
| RAFADVEN 4 Oy | Energy | 2024 |
| RAFADVEN 5 Oy | Energy | 2025 |
| RAFADVEN 6 Oy | Energy | 2025 |
| RAFADVEN 7 Oy | Energy | 2025 |
| RAFADVEN 8 Oy | Energy | 2025 |
| RAFADVEN 9 Oy | Energy | 2025 |
| Rajaha OY | Financial services | 2021 |
| RAKBEE Oy | Professional & scientific | 2025 |
| RAQ Team Oy | Arts & recreation | 2012 |
| RARE Media Oy | Arts & recreation | 2019 |
| RARE Tampere Oy | Construction | 2021 |
| RATA-monitoimi Oy | Transport & logistics | 2015 |
| RAV Consulting Oy | Construction | 2021 |
| RB Bros Oy | Financial services | 2020 |
| RB&AT Catering Oy | Hospitality | 2022 |
| RD & MH Group Oy | Real estate | 2021 |