| Procexon OY | Professional & scientific | 2008 |
| Projektia Invest OY | Real estate | 1986 |
| PSK-Engineering Oy | Wholesale & retail | 1993 |
| PT Service Ab Oy | Transport & logistics | 2005 |
| Puhetulkit Dialek OY | Professional & scientific | 2013 |
| Paikallaankulkijain osuuskunta | Arts & recreation | 2013 |
| Pajapalvelu Oy Piikkiö | Manufacturing | 1983 |
| Pal Sten Peltityöt Oy | Construction | 2016 |
| Pdat Oy | Manufacturing | 2009 |
| Pekant Lieto Kiinteistöt Oy | Real estate | 2020 |
| Pekant Lieto Oy | Other services | 2013 |
| Pentti Pullinen Oy | Real estate | 1995 |
| Perhekeskus Onni Oy | Health & social care | 2020 |
| Perttelin Tilitoimisto Oy | Professional & scientific | 1975 |
| Pesula Bam Oy | Other services | 1989 |
| Pet Blues Oy | Wholesale & retail | 2007 |
| PharmaSoukka Oy | Administrative & support | 2022 |
| PilviPomppu Oy | Arts & recreation | 2024 |
| Pintaremontointi Satopää Oy | Construction | 2022 |
| Powder-Trans Ab/Oy | Transport & logistics | 1985 |
| Power Lab Oy | Manufacturing | 2023 |
| Premium Pet Food Suomi Oy | Manufacturing | 2013 |
| Preventti Oy | Arts & recreation | 2017 |
| Private AI Solutions Oy | Information & communication | 2026 |
| Pro Parainen Ky | Real estate | 2026 |
| Profmer Oy | Manufacturing | 2023 |
| Project X-Fest Oy | Arts & recreation | 2021 |
| Projektia Engineering Oy | Construction | 1986 |
| Projektia Oy | Construction | 2023 |
| Pulmek Kiinteistöt Oy | Real estate | 2026 |
| Pulmek Oy | Manufacturing | 2026 |
| Putter Oy | Professional & scientific | 2021 |
| Puvisa Oy | Construction | 2025 |
| Päiväkoti Hattu-maakari Oy | Education | 1999 |
| Q-Flex Oy | Wholesale & retail | 2019 |
| QYP Rakennus Oy | Construction | 2021 |
| Qupeam Capital Oy | Financial services | 2020 |
| Qycon Oy | Information & communication | 2026 |
| R-B Maritime Oy | Transport & logistics | 2021 |
| R.K. Salon Lakkitehdas Oy | Manufacturing | 1981 |
| RA Ruskon Auto Oy | Other services | 2008 |
| RB Finland Oy | Wholesale & retail | 2022 |
| RS-Insinöörit Oy | Construction | 2012 |
| RS-Ruka Oy | Hospitality | 2024 |
| RT-muuraus Oy | Construction | 2014 |
| RTE-Rakennuspalvelut Oy | Construction | 2020 |
| RTR-Asennus Oy | Construction | 2021 |
| RX Moto Oy | Wholesale & retail | 2019 |
| Rakenne M. Heinonen Oy | Construction | 2015 |
| Rakennus VRU Oy | Construction | 2017 |
| Rakennusliike Nummela Oy | Construction | 2015 |
| Rakennusliike Rovirak Oy | Construction | 2024 |
| Rakennuspalvelu Aatos Rinne Oy | Construction | 1997 |
| Rakennuspalvelu Aimo Järvinen Oy | Professional & scientific | 1997 |
| Rakennussuunnittelu Timo Suvanto Oy | Professional & scientific | 2020 |
| Rakennustoimisto Aulis Tamminen Oy | Construction | 1980 |
| Rakentajat Varheenmaa Oy | Construction | 1988 |
| Raskassuunnittelu Oy | Professional & scientific | 2021 |
| Raudanluja Oy | Construction | 2019 |
| Raunocon Oy | Manufacturing | 1991 |
| Raunotec Oy | Real estate | 1982 |
| Rautkorpi Yhtiöt Oy | Health & social care | 2022 |
| Ravattulan Burger Oy | Hospitality | 2004 |
| Raven Transport Oy | Transport & logistics | 2024 |
| Ravintola VNmaku Oy | Hospitality | 2025 |
| Recikla Oy | Water & waste | 2016 |
| Reipas Siivous Oy | Administrative & support | 2018 |
| Rekka Spa Oy | Other services | 2022 |
| Reltec Oy | Manufacturing | 1990 |
| Rengas Turku Oy | Wholesale & retail | 1994 |
| Rental Service Finland Oy | Administrative & support | 2019 |
| Repamo Oy | Wholesale & retail | 2010 |
| Repera oy | Construction | 2021 |
| Retec Oy | Manufacturing | 2020 |
| Roadie-X Oy | Transport & logistics | 2016 |
| Robert Monsuuni Oy | Professional & scientific | 1992 |
| Rokasvi Oy Ab | Wholesale & retail | 2020 |
| Rototilt OY | Wholesale & retail | 2016 |
| Rout IO Technologies, Oy | Information & communication | 2012 |
| Routalaakso Oy | Health & social care | 2013 |
| Ru Works Oy | Construction | 2025 |
| Rukan Lomaosake Oy | Real estate | 1989 |
| Ryklin Oy | Administrative & support | 2007 |
| SA-Keskukset Oy | Manufacturing | 1988 |
| SCT Group Oy | Wholesale & retail | 2021 |
| SCT Rent Oy | Administrative & support | 2022 |
| SCT Service Oy | Manufacturing | 2020 |
| SES Muuttopalvelu Oy | Transport & logistics | 2022 |
| SH-Rakennuskonsultti Oy | Professional & scientific | 1987 |
| SISULASI Oy | Wholesale & retail | 2025 |
| SK Sales Oy | Financial services | 2016 |
| SPK Holding Oy | Financial services | 2018 |
| Saaristotyö ja Kuljetus Oy | Construction | 1981 |
| Safire-Lämmitin Oy | Manufacturing | 1998 |
| Sahcon Oy | Professional & scientific | 2022 |
| Saile Oy | Administrative & support | 2014 |
| Salon Kuntokeskus Oy | Arts & recreation | 2011 |
| Salon Seudun Ohjelmapalvelu Ky | Professional & scientific | 1986 |
| Saneeraus Pro Team Oy | Construction | 2019 |
| Sarin Siivous Oy | Administrative & support | 1992 |