| Pirkan Talo-Team Oy | Wholesale & retail | 1988 |
| Pirkanmaan Asiantuntijat Oy | Other services | 2020 |
| Pirkanmaan Kehyskumppanit Oy | Wholesale & retail | 1996 |
| Pirkanmaan Luonnonravinto Ky | Wholesale & retail | 1987 |
| Pirkanmaan Metallinkierrätys Oy | Water & waste | 2011 |
| Pirkanmaan Siistix Oy | Administrative & support | 2014 |
| Pirkkalan automyynti Oy | Wholesale & retail | 2019 |
| Pirkkatek Oy | Administrative & support | 2016 |
| Pirteka Oy | Wholesale & retail | 2021 |
| Pisara Group Oy | Administrative & support | 2024 |
| Pisteen hammaslääkärit Oy | Health & social care | 1988 |
| Pistocamp OY | Hospitality | 2022 |
| Pitopalvelu Lady Oy | Hospitality | 2017 |
| Pitseria Lipstikka Oy | Hospitality | 2022 |
| Planeo Oy | Professional & scientific | 2004 |
| Planoroof Oy | Construction | 2017 |
| Plant Tech Oy | Professional & scientific | 2018 |
| Platinahammas Oy | Health & social care | 2024 |
| PlayBox OY | Arts & recreation | 2022 |
| Pohjanmaan Asbestisaneeraus Oy | Construction | 2006 |
| Pohjanmaan Huonekaluteollisuuden Kehittämiskeskus Oy | Financial services | 2000 |
| Pohjanmaan Perustajat Oy | Construction | 2009 |
| Pohjantähti-Elokuva Oy | Information & communication | 1993 |
| Pohjois-Helsingin Metalli Oy | Manufacturing | 2023 |
| Pohjois-Savon Saneeraus Oy | Construction | 1985 |
| Pohjois-Suomen Autotalot Oy | Wholesale & retail | 1999 |
| Pohjois-Suomen Leipomot Oy | Manufacturing | 2020 |
| Pohjoisen Bone&Villa Oy | Professional & scientific | 2002 |
| Pohjolan Asennustekniikka Oy | Construction | 2021 |
| Pohjolan Kulta Oy | Wholesale & retail | 2023 |
| Pohjolan Kuplafutis Oy | Arts & recreation | 2017 |
| Pohjolan Pinnoituspalvelut Oy | Construction | 2022 |
| Pohjolan Pyriitti Oy | Health & social care | 2008 |
| Pohjolan Saneeraus Expert Oy | Construction | 2021 |
| Pohjolan laatupalvelut Oy | Construction | 2021 |
| Pohjolan Öljykeskus Oy | Wholesale & retail | 2014 |
| Pohka Oy | Wholesale & retail | 2023 |
| Pointix Smart Payment Oy | Information & communication | 2014 |
| Poistopistedot Oy | Wholesale & retail | 2022 |
| Polar Collection Finland Oy | Administrative & support | 1995 |
| Polar-Time Oy | Wholesale & retail | 1949 |
| Porin Autolava Oy | Manufacturing | 1983 |
| Porin NRT Oy | Wholesale & retail | 2017 |
| Porin Rakennusasiaintoimisto Oy | Professional & scientific | 1997 |
| Porin Talousneliöt Oy | Professional & scientific | 2021 |
| Pork House Investment Oy | Real estate | 2015 |
| Poro-it Oy | Information & communication | 2022 |
| Portablespace Oy | Real estate | 2020 |
| Porvoon Vaunuhuolto Ky | Wholesale & retail | 1993 |
| Poseidon Helsinki Oy | Real estate | 2012 |
| Power painting oy | Manufacturing | 2023 |
| Pozitif Drilling Finland Oy | Mining & quarrying | 2021 |
| Premium Autokeskus Oy | Wholesale & retail | 2023 |
| Premium Beauty Consept Oy | Other services | 2023 |
| Premium Crew Oy | Administrative & support | 2016 |
| Premium Padel Oy | Education | 2019 |
| Premium Way Oy | Transport & logistics | 2018 |
| Premiumia Oy | Information & communication | 2021 |
| Price Club Oy | Wholesale & retail | 2010 |
| Prima lumber Oy | Wholesale & retail | 2022 |
| Primare Oy | Wholesale & retail | 1993 |
| Prime Kos Global Oy | Professional & scientific | 2014 |
| Primera Holidays Oy | Administrative & support | 1973 |
| Priton Oy | Construction | 2012 |
| Privilegium Oy | Professional & scientific | 2023 |
| Pro Real Estate Oy | Professional & scientific | 2018 |
| Pro-Hakka Pelti Oy | Construction | 2020 |
| Pro4 Wireless Oy | Manufacturing | 1994 |
| ProManse Oy | Hospitality | 2023 |
| Proerx oy | Construction | 2024 |
| Profima Finance Oy | Professional & scientific | 2010 |
| Project People OY | Administrative & support | 2017 |
| Prometheus TECH Oy | Professional & scientific | 2021 |
| Prometrix Oy | Information & communication | 2019 |
| Promilux Palvelut Oy | Construction | 2020 |
| Promise Realtors Oy LKV | Real estate | 2017 |
| Pronia Oy | Construction | 2014 |
| Prosasec Oy | Manufacturing | 2020 |
| Protecthis Oy | Wholesale & retail | 2020 |
| Provende anl | Wholesale & retail | 2017 |
| Provodkative Oy | Wholesale & retail | 1991 |
| Proware Oy | Hospitality | 2014 |
| Psc Rakenne Oy | Real estate | 2022 |
| Pseudofinn Enterprises Oy | Financial services | 2024 |
| Pub Limp Crow Oy | Hospitality | 2022 |
| Pueblo Unido Oy | Hospitality | 2023 |
| Puffis Ab | Financial services | 2022 |
| Puhallus Vuorenmaa Oy | Construction | 1991 |
| Puhdas Ruoka Suomi Oy | Manufacturing | 2017 |
| Puhdaspurku Oy | Construction | 2020 |
| Puhelinpelastus Oy | Information & communication | 2020 |
| Puijon Rakennus- ja Saneerauspalvelu Oy | Real estate | 2022 |
| Puistola Expres Oy | Hospitality | 2020 |
| Puistotien Harppi ja Petkele Oy | Construction | 2015 |
| Puistotien Öljykivi ja kottikärry Oy | Arts & recreation | 2017 |
| Pulkkisen Koneyhtiö Avoin yhtiö | Administrative & support | 2007 |
| Pulog oy | Transport & logistics | 2019 |
| Pult Oy | Construction | 2005 |
| Pulverimaalaamo Tuusula Oy | Manufacturing | 2022 |
| Pump Trade Oy | Wholesale & retail | 2015 |