| Paaltonen Oy | Professional & scientific | 2025 |
| Paalupojat Oy | Construction | 1989 |
| Paapi Invest Oy | Financial services | 2026 |
| Paarmavaara Oy | Hospitality | 2022 |
| Paaryt Oy | Real estate | 1991 |
| Paasi-Optiikka avoin yhtiö | Wholesale & retail | 2008 |
| Paasikivi Consulting Oy | Arts & recreation | 2023 |
| Paaso Capital Oy | Financial services | 2021 |
| Paasosen Putiikki Oy | Arts & recreation | 2012 |
| Paatinkankaan Energiapuisto GP Oy | Energy | 2023 |
| Paatinkankaan Energiapuisto Ky | Energy | 2023 |
| Paatos Invest Oy | Financial services | 2021 |
| Paavilainen Consulting Oy | Administrative & support | 2004 |
| Paavilainen Group Oy | Administrative & support | 2010 |
| Paavo Salo & Co | Transport & logistics | 1962 |
| Paavonpuisto Oy | Energy | 2024 |
| Pabitra Oy | Hospitality | 2017 |
| Pablo Photo Oy | Administrative & support | 2014 |
| Pablo ja Dali Oy | Financial services | 2021 |
| Pachanga Oy | Wholesale & retail | 2026 |
| Pacific Group Oy | Wholesale & retail | 2011 |
| Pacific Grove Oy | Wholesale & retail | 2023 |
| Pacifico Style Oy | Hospitality | 2024 |
| Pacioli Network Finland Oy | Information & communication | 2023 |
| Package Testing & Research Oy | Professional & scientific | 2016 |
| Packnord Oy | Wholesale & retail | 2019 |
| Pacob SPV I Oy | Financial services | 2023 |
| Padel Box Oy | Arts & recreation | 2020 |
| Padel Brothers Oy | Arts & recreation | 2021 |
| Padel Kiinteistöt Oy | Arts & recreation | 2019 |
| Padel LPR Oy | Arts & recreation | 2021 |
| Padel Pirados Oy | Arts & recreation | 2021 |
| Padel Pirkkola Oy | Arts & recreation | 2025 |
| Padel Vallila Oy | Arts & recreation | 2025 |
| Padel Viikki Oy | Arts & recreation | 2023 |
| Padelco Oy | Construction | 2009 |
| Padelliitto Suomi Oy | Arts & recreation | 2024 |
| Padelton Veikkola Oy | Arts & recreation | 2021 |
| Pades Oy | Wholesale & retail | 2004 |
| Page1 Group Oy | Information & communication | 2025 |
| Paginae Oy | Wholesale & retail | 2023 |
| Paha Juuso ky | Professional & scientific | 1996 |
| Paha Silmä Oy | Wholesale & retail | 2024 |
| Paha Tapa Oy | Professional & scientific | 2020 |
| Pahkakosken Energia Oy | Energy | 2016 |
| Pahkavaara Grid Oy | Energy | 2023 |
| Pahkavaara Wind Oy | Energy | 2020 |
| Pahuna Oy | Hospitality | 2015 |
| PaiPro Oy Ab | Professional & scientific | 2022 |
| Paidallinenriehuja Oy | Wholesale & retail | 2023 |
| Paidatonriehuja Oy | Information & communication | 2023 |
| Paihmaa Holdings Oy | Financial services | 2021 |
| Paihmaa Ventures Oy | Financial services | 2018 |
| Paik avoin yhtiö | Education | 2016 |
| Paikalliset Suomi OY | Information & communication | 2020 |
| Paikalliskiinteistöt Oy | Real estate | 2025 |
| Paikallistalot Oy | Real estate | 2025 |
| Paikallistilat Oy | Real estate | 2025 |
| Paikat kuntoon Oy | Health & social care | 2024 |
| Paikat puhtaaksi Oy | Wholesale & retail | 2024 |
| Paimenkoira Kustannus Oy | Information & communication | 2025 |
| Paimenkoira Oy | Information & communication | 2021 |
| Painava Nummelin, avoin yhtiö | Manufacturing | 1998 |
| Painetaan Bulilla Oy | Administrative & support | 2022 |
| Paino Niini Ky | Manufacturing | 1981 |
| PainoVoima Oy | Arts & recreation | 2026 |
| Painoekspert Oy | Information & communication | 1981 |
| Painokaksikko Oy | Manufacturing | 1969 |
| Painoliber Oy | Manufacturing | 2019 |
| Painomesta Oy | Manufacturing | 1990 |
| Painovalmiste Erkki Lajaste, Kommandiittiyhtiö | Manufacturing | 1965 |
| Painoyhtiö And Oy | Real estate | 1985 |
| Paint&Building Finland Oy | Construction | 2002 |
| Paint-X Oy | Other services | 2019 |
| Paint28 Oy | Other services | 2023 |
| PaintMe Finland Oy | Construction | 2005 |
| Paintballgames Oy | Wholesale & retail | 1989 |
| Painters Therapy Oy | Health & social care | 1987 |
| Paintmasters Oy | Construction | 2003 |
| Paints and Friends osk | Arts & recreation | 2019 |
| Paintteri Oy | Construction | 2025 |
| Pair of Jacks Invest Oy | Financial services | 2021 |
| Paisley Consulting Oy | Wholesale & retail | 1998 |
| Paiste Oy | Hospitality | 2006 |
| Paiste Productions Oy | Professional & scientific | 2014 |
| Paiste Ventures Oy | Financial services | 2025 |
| Paistinkulman Energiavarasto Oy | Energy | 2022 |
| Paja Concept Oy | Professional & scientific | 2012 |
| Paja Consulting Oy | Professional & scientific | 2026 |
| Paja Finanssipalvelut Oy | Professional & scientific | 2010 |
| Paja Hukka & Polttila Oy | Arts & recreation | 2021 |
| Paja&Bureau Oy | Manufacturing | 2016 |
| PajaBoost Oy | Professional & scientific | 2020 |
| Pajala Etelä-Suomi Oy | Construction | 2020 |
| Pajala Tilat Oy | Construction | 2024 |
| Pajala Yhtiöiden Parkki Oy | Real estate | 2025 |
| Pajala Yhtiöt Oy | Construction | 2019 |
| Pajalahti Capital Oy | Professional & scientific | 2025 |
| Pajalahti Trading Oy | Wholesale & retail | 2015 |
| Pajamo Oy | Professional & scientific | 2023 |