| Oy Enitec Engineering Ab | Professional & scientific | 1994 |
| Oy Forssa-Engineering Ab | Manufacturing | 1987 |
| Oy Maxisauce Ltd | Wholesale & retail | 1994 |
| Oy Noortrade Ab | Wholesale & retail | 1985 |
| Oy Rindells Bil Ab | Administrative & support | 2025 |
| Oy Siivam Ab | Wholesale & retail | 2002 |
| Oy Spinkkilä Ltd | Construction | 1969 |
| Oy Steritech Technology Ltd | Manufacturing | 2017 |
| Oy T & T Hellsten | Administrative & support | 2008 |
| Oy UG Parent Ab | Real estate | 2020 |
| Pet Test Finland OY | Professional & scientific | 2024 |
| PF Finance Oy | Wholesale & retail | 2023 |
| PH Control Oy | Financial services | 2017 |
| PP Investment Oy | Professional & scientific | 2019 |
| PP-Tec Oy | Manufacturing | 2012 |
| PT-Promo Avoin yhtiö | Professional & scientific | 2005 |
| PT55 Invest Oy | Real estate | 2016 |
| PaRi - Yhtiöt Oy | Professional & scientific | 2021 |
| Pacumon Oy | Arts & recreation | 2021 |
| Padel Salo Oy | Arts & recreation | 2020 |
| Paino-Kaarina Oy | Manufacturing | 1993 |
| Paistajankatu 4 Teollisuuskiinteistö Oy | Real estate | 1988 |
| Palveluyhtiö Rosi Oy | Administrative & support | 2023 |
| Parmaal Oy | Construction | 1997 |
| Peimarin Kiinteistöpalvelut Oy | Real estate | 2020 |
| Peltisepänliike Simo Lindell Ky | Manufacturing | 1985 |
| Peltityö M. Lehtonen Ky | Construction | 1985 |
| Perla Acorde Oy | Health & social care | 2016 |
| Perunkirjoitustoimisto Kirsi Lassila Oy | Professional & scientific | 2026 |
| Perälän remontti ja vuokraus oy | Construction | 2022 |
| Pesula Sani Oy | Other services | 2015 |
| Petracella Oy | Wholesale & retail | 2023 |
| Phinland Coffee Oy | Wholesale & retail | 2026 |
| Piikmet Oy | Other services | 2007 |
| Piispanristi Invest Oy Ab | Real estate | 2021 |
| Piispanristin Saha Oy | Manufacturing | 1988 |
| Pintasaneeraus Ranne Oy | Construction | 2025 |
| PipeSol Oy | Wholesale & retail | 2013 |
| Pitkäpoffi Oy | Wholesale & retail | 1997 |
| Pival Innovation Oy | Manufacturing | 2023 |
| Pizzeria Dennis Oy | Hospitality | 1974 |
| Playcenter Europe Oy | Construction | 2019 |
| Player Too Oy | Arts & recreation | 2022 |
| Playway Oy | Wholesale & retail | 2023 |
| Plot Partners Oy | Professional & scientific | 2025 |
| PoMa Group Oy | Administrative & support | 2019 |
| Polaris Food Oy | Hospitality | 2025 |
| Pomoni Oy | Professional & scientific | 2021 |
| Power Poutanen Oy | Transport & logistics | 2022 |
| Power of Sun Oy | Construction | 1992 |
| Pqsalo Oy | Information & communication | 2023 |
| Princeps Oy | Professional & scientific | 1990 |
| Printtitalo TM Oy | Manufacturing | 2014 |
| Prionova Oy | Professional & scientific | 1993 |
| Probemen Oy | Professional & scientific | 2016 |
| Promarine Oy | Manufacturing | 2005 |
| Proper Manager Oy | Real estate | 2021 |
| Prossima Oy | Health & social care | 1996 |
| Protomet Oy | Manufacturing | 2017 |
| Psykoterapiapalvelut Rohkeus Oy | Health & social care | 2025 |
| Public House Ravintolat Kaarina Oy | Hospitality | 2002 |
| PureSit Oy | Manufacturing | 2024 |
| Purkava Oy | Construction | 2016 |
| Purku ja Rakennus B&F Oy | Construction | 2016 |
| Purla Oy | Wholesale & retail | 2023 |
| Putkimus Oy | Construction | 2019 |
| Puuvaja Group Oy | Manufacturing | 1989 |
| Puuvaja Oy | Manufacturing | 2023 |
| Päivähoito Villa Leppis Oy | Education | 2009 |
| Päiväpörssi Oy | Financial services | 1989 |
| Qspect Oy | Construction | 2012 |
| Qualifia Oy | Professional & scientific | 2022 |
| R Rikkonen Oy | Professional & scientific | 1996 |
| R.T.U.-Toimi OY | Construction | 2000 |
| Raketo Ky | Construction | 2000 |
| RAM Rakennus & Consulting Oy | Construction | 2019 |
| RCEO Holding Oy | Financial services | 2025 |
| RCEO Oy | Professional & scientific | 2025 |
| RHVT-Invest Oy | Financial services | 1994 |
| RTAL Nordic investments oy | Financial services | 2026 |
| Rahan takii Oy | Real estate | 2021 |
| Raiha Hydraulics Oy | Wholesale & retail | 2004 |
| Rakennus Kantonen Oy | Construction | 2007 |
| Rakennus Kämi Oy | Construction | 1995 |
| Rakennus Teak Kaarina Avoin yhtiö | Construction | 1996 |
| Rakennusliike Moderni Talo Oy | Construction | 2020 |
| Rakennuspalvelu I & H Oy | Construction | 2022 |
| Rakennustuote J. Tuokko Oy | Construction | 2002 |
| Rakepal Oy | Construction | 2025 |
| Ramera Oy | Construction | 2022 |
| Rami asunnot oy | Real estate | 2021 |
| Ramoplan Oy | Professional & scientific | 2013 |
| Ranka Group Oy | Real estate | 2021 |
| Rannikkokuriiri Oy | Professional & scientific | 2006 |
| Ratkaisun Ovi Oy | Professional & scientific | 2013 |
| Rauhalinna Invest Oy Ab | Real estate | 2021 |
| Rautaportti Oy | Wholesale & retail | 2004 |
| Ravintola Focca Oy | Hospitality | 2018 |
| Ravintola Matilda Oy | Hospitality | 2025 |
| ReCounter Oy | Administrative & support | 2020 |