| Paramet Konepaja Oy | Manufacturing | 1990 |
| Paramet Oy | Manufacturing | 1988 |
| Parbour Oy | Hospitality | 2025 |
| Parcloud Oy | Information & communication | 2020 |
| Pargas Bilcenter Ab | Wholesale & retail | 1987 |
| Pargas El Ab - Paraisten Sähkö Oy | Construction | 1992 |
| Pargas Elementhus Ab | Construction | 2010 |
| Pargas Fjärrvärme Ab - Paraisten Kaukolämpö Oy | Energy | 1982 |
| Pargas Hamn AB | Hospitality | 2021 |
| Pargas Hyreshus Ab | Real estate | 1949 |
| Pargas Idrotts- och Ungdomsgård Ab | Arts & recreation | 1976 |
| Pargas Padelhall Ab Oy | Arts & recreation | 2021 |
| Pargas Port Ab | Hospitality | 1982 |
| Pargas Ring och Service Ab - Paraisten Rengas ja Huolto Oy | Other services | 2013 |
| Pargas Service Center Ab | Other services | 1996 |
| Pargas Snickeri - Paraisten Puutyö Oy Ab | Manufacturing | 1990 |
| Pargas TV-service Ab | Wholesale & retail | 1995 |
| Pargas Telefon Ab - Paraisten Puhelin Oy | Information & communication | 1914 |
| Pargas Trafikcentral Ab | Wholesale & retail | 1998 |
| Pargas bok och papper Ab | Wholesale & retail | 2023 |
| Parnavi Oy | Real estate | 1996 |
| Parplanet Ky | Professional & scientific | 2005 |
| Pasmon Oy | Manufacturing | 2020 |
| Pelagia Oy | Hospitality | 2008 |
| Pelles Gräv Ab - Pellen Kaivuu Oy | Construction | 2001 |
| Perhekoti Vaapukka Oy | Health & social care | 2010 |
| Petorak Oy Ab | Construction | 2014 |
| Phantom Finance Oy Ab | Financial services | 2019 |
| Piikkiön Kalustemaalaus Oy | Other services | 1993 |
| Plåtslageri T Lindström Ab | Manufacturing | 1982 |
| PoToJ Trading Ab | Construction | 2004 |
| Polar Wellness oy | Other services | 2026 |
| Polmetton laituriosuuskunta | Arts & recreation | 2019 |
| Portefeuille Oy | Financial services | 2020 |
| Power KitchBar Oy | Wholesale & retail | 2020 |
| Printer Finland Oy | Manufacturing | 2000 |
| ProBalanceFi Oy | Professional & scientific | 2025 |
| Profab Oy | Manufacturing | 2017 |
| ProntoSailing Oy | Wholesale & retail | 2007 |
| Puhdas Koti Kai Ahlgren Oy | Administrative & support | 2020 |
| Puhde Oy | Administrative & support | 2024 |
| Pumppa Oy | Wholesale & retail | 2011 |
| Putkes Oy | Construction | 2021 |
| Putki-Parainen Oy | Construction | 2004 |
| R-L Erikoispalvelut Oy | Professional & scientific | 2009 |
| R. Soinela Oy | Financial services | 2021 |
| RB Holding Oy | Transport & logistics | 2006 |
| RG-Company Oy Ab | Manufacturing | 2017 |
| RH-IntoFinland Oy | Administrative & support | 2024 |
| RK-Clean Oy | Administrative & support | 1990 |
| RL-Huolto Oy | Manufacturing | 1992 |
| RS-Planering Ab | Professional & scientific | 1989 |
| RST- Poiju Oy | Manufacturing | 2026 |
| RT-Fix Ab | Construction | 2022 |
| Rakennus Ixi Oy | Construction | 2005 |
| Rakennus Perä Oy | Construction | 2007 |
| Rakennuspalvelu RATKES Oy | Construction | 2020 |
| Rakennustyö Hukkila Oy | Wholesale & retail | 2021 |
| Ravintola Suntti Oy | Hospitality | 2022 |
| Ravintola Venezia Oy | Hospitality | 2019 |
| Ravintola Venezia-Solin Oy | Hospitality | 2023 |
| Rebelle Bakery Oy | Hospitality | 2016 |
| Reemark Ab | Agriculture & fishing | 2003 |
| Riimi Holding Oy | Financial services | 2026 |
| Roberts Bröd Oy Ab | Manufacturing | 2016 |
| Rockfun Promotions & Agency Oy | Professional & scientific | 2013 |
| Rohtohelpi Oy | Wholesale & retail | 2005 |
| Rosin & Kullberg Oy Ab | Professional & scientific | 2008 |
| Ruoco Oy | Manufacturing | 2024 |
| Rörkalle Kb - Putkikalle Ky | Construction | 1983 |
| S&R Lehtinen Oy | Construction | 2022 |
| SCT Trading Oy | Financial services | 2016 |
| SK. Ke-Ko Oy | Real estate | 1990 |
| SKAL-Yhtiö Oy | Financial services | 2000 |
| STEM School Finland Oy | Education | 2019 |
| Saariston Autopesu Oy | Other services | 2025 |
| Saariston Lasi Oy | Construction | 2017 |
| Saariston Pesula Oy | Other services | 2019 |
| Saariston Putkityö Oy | Construction | 2017 |
| Saariston Sammutin Oy | Wholesale & retail | 1984 |
| Saariston Tilipalvelu Oy | Professional & scientific | 2026 |
| Saariston Venekuvaus Oy | Professional & scientific | 2021 |
| Saariston Verkkokauppa avoin yhtiö | Wholesale & retail | 2012 |
| Saariston Vuokravene avoin yhtiö | Administrative & support | 2024 |
| Saariston Kiinteistöpalvelut Oy | Administrative & support | 2019 |
| Saaristopaja Oy | Other services | 2016 |
| Saaristovälittäjä Oy | Real estate | 2003 |
| Sahalin Oy | Manufacturing | 1982 |
| Sake Kiinteistöhuolto Oy | Real estate | 2022 |
| Samran Oy | Professional & scientific | 2025 |
| San-tech Byggtjänst Ab | Construction | 2023 |
| Sandy Bee Arts Ltd Ab | Arts & recreation | 2019 |
| Saneeraustyö Hannu Levonen Oy | Construction | 2016 |
| Satama Life Oy | Education | 2022 |
| Scanocean Finland Oy Ab | Wholesale & retail | 2018 |
| School 2040 Oy | Education | 2022 |
| Serviceaffär Reijo Laine Kb | Manufacturing | 1983 |
| Shadestone Oy | Professional & scientific | 2014 |
| Ship-Elbox Oy | Construction | 1985 |
| Shuntian Oy | Hospitality | 2007 |