| Paimion Jalkapallokeskus Oy | Real estate | 2020 |
| Paimion Kehitys Oy | Professional & scientific | 2019 |
| Paimion Konetyö ja Maansiirto Oy | Transport & logistics | 1991 |
| Paimion Kukkapalvelu Oy | Wholesale & retail | 2026 |
| Paimion Kuljetus Oy | Transport & logistics | 1989 |
| Paimion Kunnossapito Oy | Construction | 1991 |
| Paimion Logistiikkakeskus Oy | Transport & logistics | 2015 |
| Paimion Lämpökeskus Oy | Energy | 1975 |
| Paimion Metka Hinta Oy | Wholesale & retail | 1996 |
| Paimion Optiikka Oy | Wholesale & retail | 1992 |
| Paimion Palaliha Oy | Wholesale & retail | 1998 |
| Paimion Peltituote Oy | Manufacturing | 2017 |
| Paimion Pipe Tec Oy | Construction | 2012 |
| Paimion Portti Kiinteistöt Oy | Real estate | 2019 |
| Paimion Puupojat Oy | Construction | 1997 |
| Paimion Simera Oy | Construction | 1995 |
| Paimion Säätöpiste Ky | Other services | 1990 |
| Paimion Teurastamo Oy | Manufacturing | 1979 |
| Paimion Valimokiinteistöt Oy | Real estate | 1989 |
| Paimion Vapakauppa Oy | Wholesale & retail | 2025 |
| Paimion Vene- ja Pienkonekorjaamo Oy | Manufacturing | 1999 |
| Paimion Vesi ja Lämpö Kommandiittiyhtiö | Construction | 1953 |
| Paimion Vesihuolto Oy | Construction | 2013 |
| Paimion Vuokralaite Oy | Administrative & support | 1990 |
| Paimion Yrityskiinteistöt Oy | Real estate | 1978 |
| Paimion rengaspalvelu Oy | Other services | 2024 |
| Paimion-Sauvon Fysioterapia Ky | Health & social care | 1984 |
| Pakustore oy | Professional & scientific | 2025 |
| Pala ratkaisua Oy | Health & social care | 2025 |
| Papa Engineering Oy | Professional & scientific | 1994 |
| Papakiinteistöt Oy | Real estate | 1996 |
| Parcapital Oy | Professional & scientific | 2016 |
| Parkettityöt Rinne OY | Construction | 2020 |
| Peimari Logistiikka Oy | Transport & logistics | 2024 |
| Peimarin Infrapalvelu Oy | Construction | 2024 |
| Peimarin LVI Oy | Construction | 2010 |
| Peimarin Liikenne Oy | Transport & logistics | 2007 |
| Peimarin Mattopesu Avoin yhtiö | Other services | 2006 |
| Peimarin Rakennuspalvelu Oy | Construction | 2016 |
| Peimarin Rakennustyö Oy | Construction | 2017 |
| Peimarin Tiilikartano Oy | Real estate | 2004 |
| Perhelääkäri Koristo Oy | Health & social care | 2023 |
| Petri Reunanen Oy | Transport & logistics | 1998 |
| Pigeon & Viper Oy | Professional & scientific | 2020 |
| Pikseleit Oy | Information & communication | 2020 |
| Portaaton Oy | Construction | 2021 |
| Posive Oy | Information & communication | 2014 |
| Poutajoen vesiosuuskunta | Water & waste | 2009 |
| Premedium Clinical Trial Consulting Oy | Health & social care | 2025 |
| Prismapak Ky | Administrative & support | 1991 |
| Prodec Automation Oy | Professional & scientific | 2009 |
| Promecon Oy | Professional & scientific | 2004 |
| Provision Master Oy | Manufacturing | 2020 |
| Puhetulkit JuTuksi Oy | Professional & scientific | 2009 |
| Pumppuset Oy | Construction | 2020 |
| Pure Home Nordic Oy | Construction | 2025 |
| Puuvinkki Ky | Construction | 1994 |
| Pystykorva Helsinki Oy | Professional & scientific | 2007 |
| Pyöräliike Santala Oy | Wholesale & retail | 1984 |
| Päiväkoti Viidakkovekarat Oy | Health & social care | 2006 |
| Pöytyän Lämpökeskus Oy | Energy | 1978 |
| RC Maakari Oy | Wholesale & retail | 2019 |
| Rentanom OY | Real estate | 2018 |
| RJ Isomäki Oy | Construction | 2023 |
| ROUHIA Holding Oy | Professional & scientific | 2018 |
| RS-Auto OY | Wholesale & retail | 2022 |
| Raana Oy | Construction | 2023 |
| RakSane Oy | Construction | 2023 |
| Rakennus-Artturi Oy | Construction | 2008 |
| Rakennus-Merilä Oy | Construction | 1994 |
| Rakennusliike Jalo & Fagerström Oy | Construction | 1990 |
| Rakennuttajatoimisto Ville Haahti Oy | Professional & scientific | 2025 |
| Rakentamispalvelut M.Ehrlund Oy | Construction | 2005 |
| Raksataksi Oy | Transport & logistics | 2012 |
| Rauhalan Louhinta Oy | Professional & scientific | 2011 |
| Ravintola Femme Oy | Hospitality | 2014 |
| Realtum Oy | Real estate | 2006 |
| Reef Rescue - management consulting Oy | Professional & scientific | 2012 |
| Reilikari Oy | Financial services | 2002 |
| Rekottila Oy | Agriculture & fishing | 2012 |
| Remonttipalvelu Lätti Oy | Construction | 2025 |
| RenoTube Oy | Construction | 2018 |
| Rester Oy | Manufacturing | 2019 |
| Road Marking Solutions Oy Finland | Construction | 2023 |
| Ruonlahden Oy | Agriculture & fishing | 2025 |
| Räsä Group Oy | Hospitality | 1995 |
| S Varjus Ky | Wholesale & retail | 2011 |
| Saaren tila Oy | Agriculture & fishing | 2010 |
| Salon Seudun Turvapalvelut Oy | Administrative & support | 2008 |
| Samion Trading Oy | Financial services | 2026 |
| Santax Medico Oy | Wholesale & retail | 2015 |
| Saralab Oy | Information & communication | 2007 |
| Sartu Invest Oy | Construction | 2024 |
| Satava Asunnot Oy | Real estate | 2024 |
| Sauvon erä Oy | Real estate | 2015 |
| Scandiavian Group Rakennus Oy | Construction | 2020 |
| Seleinka Oy | Transport & logistics | 1990 |
| Serilog Ky | Manufacturing | 2005 |
| Sievolan tila Oy | Agriculture & fishing | 2019 |
| Sivuluisu avoin yhtiö | Arts & recreation | 2015 |