| Posedo Oy | Real estate | 2015 |
| Poster Image Oy | Professional & scientific | 2003 |
| Pro Fix-Service PFS Oy | Other services | 2013 |
| Pro Kiinteistötekniikka Oy | Construction | 2012 |
| Pro MiuHau Oy | Education | 2018 |
| Pro Purku Team Oy | Construction | 2020 |
| Pro-Puhdistus Consulting Oy | Professional & scientific | 2022 |
| Pro-Puhdistus Oy | Administrative & support | 2016 |
| ProCoats Consulting Oy | Manufacturing | 2022 |
| Problems Incorporated Oy | Administrative & support | 2017 |
| Profetec Oy | Manufacturing | 2014 |
| Prohon Oy | Professional & scientific | 2013 |
| Project Mount Oy | Manufacturing | 2019 |
| Promo Market Finland Oy | Professional & scientific | 2019 |
| Pronger Oy | Manufacturing | 2009 |
| Psykoterapiapalvelu Saarni Oy | Health & social care | 2026 |
| Puheterapia Sanapuro Oy | Health & social care | 2023 |
| Puheterapia Sanataito Oy | Health & social care | 2018 |
| Pukki Disruptive Oy | Professional & scientific | 2017 |
| Puromotor Oy | Wholesale & retail | 1992 |
| Puutoimi Tapio Outinen Oy | Wholesale & retail | 1995 |
| Päivästö Holding Oy | Financial services | 2009 |
| RAI-Invest Oy | Financial services | 2015 |
| RIS-Investment Services Oy | Wholesale & retail | 2000 |
| RM-Metsäpojat Oy | Agriculture & fishing | 2016 |
| RRB Partners Oy | Administrative & support | 2025 |
| RVH GROUP Oy | Professional & scientific | 2025 |
| Raattala Oy | Health & social care | 2021 |
| Rakennus Kellosaari Pirkanmaa Oy | Construction | 2018 |
| Rakennuskolmio Ky Hämeenkyrö | Construction | 2004 |
| Rakennusliike TasanTarkka Oy | Construction | 2007 |
| Rakennuspalvelu Juha Mäntylä Oy | Construction | 2017 |
| Rakennuspalvelu Saarela Oy | Construction | 2011 |
| Rakennustyö Lahtinen Oy | Real estate | 2011 |
| Rakennusurakointi J. Häkkinen Oy | Construction | 2003 |
| Rakentajapalvelu Group Oy | Professional & scientific | 2023 |
| Raktop Oy | Construction | 1998 |
| Rasa Consulting Oy | Professional & scientific | 2020 |
| Ratsutila Kristalli Oy | Arts & recreation | 1995 |
| Rautalaaki Oy | Manufacturing | 1988 |
| Ravitalli Hope Ky | Arts & recreation | 2003 |
| RealFinland Ky | Administrative & support | 2010 |
| Reas asennus Oy | Construction | 2022 |
| Rebecon Oy | Construction | 2023 |
| Rebex Oy | Manufacturing | 2000 |
| Refresh Solutions Oy | Construction | 2026 |
| Remedy Consulting Oy | Professional & scientific | 1995 |
| Rengas-Pekka Oy | Wholesale & retail | 2026 |
| Reolton Oy | Wholesale & retail | 2015 |
| Reprostudio Säynäväjärvi & Surakka Ky | Manufacturing | 1986 |
| Resnas Oy | Wholesale & retail | 2016 |
| Restaurantti Oy | Construction | 2022 |
| Reuharin Tennisosakeyhtiö | Arts & recreation | 1984 |
| Reven Oy | Construction | 2016 |
| Rhino Consulting Oy | Professional & scientific | 2009 |
| Riihi Ventures Oy | Health & social care | 2018 |
| Riikonen Group Oy | Manufacturing | 1982 |
| Rimbo Asbest Oy | Construction | 2011 |
| Rinkadia Holding Oy | Financial services | 2026 |
| Rinkadia Oy | Information & communication | 2026 |
| Robotech Oy | Manufacturing | 2017 |
| Rodbay Oy | Construction | 2011 |
| Rovaniemen Tuulivoima Oy | Energy | 2018 |
| Royal Oak Capital Oy | Financial services | 2019 |
| Ryhmäperhepäiväkoti Villa Vallaton avoin yhtiö | Education | 2021 |
| Räikkä Training Oy | Arts & recreation | 2021 |
| Räjäytys Kaksikko Oy | Construction | 1997 |
| S&M Aquila Oy | Wholesale & retail | 2011 |
| SA Maalaus Ky | Construction | 2016 |
| Safeparts Finland OY | Wholesale & retail | 2002 |
| SH-Remontti Oy | Construction | 2019 |
| Sisä-Suomen Siivouspalvelut OY | Construction | 2023 |
| SOL-Kaihdin Oy | Manufacturing | 1994 |
| SORJA Invest Oy | Real estate | 2026 |
| Souk OY | Hospitality | 2023 |
| Sp-Talot OY | Construction | 2019 |
| SRS Kiinteistöt Oy | Construction | 2023 |
| ST-Koneistus Oy | Manufacturing | 2025 |
| STSN Yhtiöt Oy | Manufacturing | 2005 |
| STU Haanpää Oy | Construction | 2015 |
| SV Staaf Investing Oy | Financial services | 2025 |
| SaRahtek Oy | Construction | 2023 |
| Saapua Oy | Professional & scientific | 2022 |
| Saartorakennus Oy | Construction | 2012 |
| Saimaan Onni Oy | Hospitality | 2023 |
| Sairex Oy | Manufacturing | 2023 |
| Sajakorpi Oy | Manufacturing | 1947 |
| Sajatek Oy | Construction | 2021 |
| Salli Kiinteistöt Oy | Real estate | 1991 |
| Samcon Oy | Construction | 2018 |
| Sammalisto Racing Oy | Arts & recreation | 2019 |
| Sanamatka Oy | Health & social care | 2024 |
| Sasu-Saneeraus Oy | Construction | 2020 |
| SataPirkan Konsultointi Oy | Professional & scientific | 2019 |
| Satumetsä Concept Group Oy | Wholesale & retail | 2025 |
| Saving Solutions Oy | Information & communication | 2021 |
| Scaevola Oy | Wholesale & retail | 1988 |
| Scandipap Oy | Wholesale & retail | 1999 |
| Scanweld Installation Oy | Manufacturing | 1989 |
| ScreenBox Oy | Information & communication | 2020 |