| Pintakone Hamina Oy | Manufacturing | 2022 |
| Pintakäsittely Paljetti Oy | Construction | 2022 |
| Pintakäsittelyliike Pikantti Oy | Construction | 2017 |
| Pitopalvelu Kekäläinen Avoin yhtiö | Hospitality | 1999 |
| Pokerpool Oy | Wholesale & retail | 1996 |
| Prefere Resins Finland Oy | Manufacturing | 2013 |
| Prof Trading Oy | Wholesale & retail | 2024 |
| Prontec ProWork Oy | Transport & logistics | 2023 |
| Prontec Service Oy | Administrative & support | 2012 |
| Pudu Oy | Hospitality | 2026 |
| Pulma Invest Oy | Real estate | 2021 |
| Pulsari Oy | Real estate | 2023 |
| Puolipohja Oy | Hospitality | 2025 |
| Puosti Oy | Real estate | 2025 |
| Puotelin Portti Oy | Real estate | 2014 |
| Pursiravintolat Vantti Ky | Hospitality | 1990 |
| Quantum Vanguard Oy | Information & communication | 2021 |
| R.S.H-palvelut oy | Construction | 2023 |
| RR-Koneurakointi Oy | Construction | 2013 |
| RTS-Palvelu Oy | Construction | 1996 |
| RTT Service Oy | Transport & logistics | 2021 |
| Raati Cafe Oy | Hospitality | 2000 |
| Rahti Soikkeli Oy | Transport & logistics | 2005 |
| Raimo Kantola Ky | Professional & scientific | 2011 |
| Rakennus Ahma Oy | Construction | 2007 |
| Rakennus Koskimies Oy | Construction | 2009 |
| Rakennus Oy Vekla | Construction | 1995 |
| Rakennus Suortti Oy | Construction | 2010 |
| Rakennus Teikari Oy | Construction | 2012 |
| Rakennus- ja insinööritoimisto DualTech Oy | Construction | 2007 |
| Rakennusliike J. V. Määttänen Kommandiittiyhtiö | Construction | 1980 |
| Rakennusliike Toikka Oy | Construction | 2019 |
| Rakennuspalvelu O.Husu Oy | Construction | 2023 |
| Rakennuspalvelu Sami Pousi Oy | Construction | 2016 |
| Rakennuspalvelu Vuorio Oy | Construction | 2012 |
| Rakennuspelti Sahala Oy | Construction | 1993 |
| Rakennuttajapalvelu Forsell Oy | Real estate | 2024 |
| Rakennuttajapalvelu Jaakoppi Oy | Real estate | 2015 |
| Rampsi Oy | Wholesale & retail | 1994 |
| Rampsi Öne Oy | Hospitality | 2024 |
| Rantatähkä Oy | Real estate | 2021 |
| Ravimäkipalvelut Oy | Health & social care | 2018 |
| RavintolaTitanic Oy | Hospitality | 2024 |
| Reedged Oy | Manufacturing | 2022 |
| Refoiled Oy | Manufacturing | 2022 |
| Rehti-Jalmari Oy | Arts & recreation | 1994 |
| Rempo Oy | Construction | 2026 |
| Renitta Oy | Hospitality | 2016 |
| Riku Olli Ky | Manufacturing | 2024 |
| Rinomark Oy | Professional & scientific | 1994 |
| Riparando Oy | Professional & scientific | 2024 |
| Risto Salomäki Ky | Administrative & support | 1989 |
| Ritkapel Oy | Hospitality | 2010 |
| Riverman Holding Oy | Wholesale & retail | 2023 |
| Rose Group Oy | Professional & scientific | 2026 |
| Roseprint Oy | Professional & scientific | 1986 |
| Rui An Ky | Hospitality | 2013 |
| Rullax Ky | Manufacturing | 2004 |
| Ruuvi-Kiinteistöt Oy | Professional & scientific | 1996 |
| S Consulting Oy | Professional & scientific | 2024 |
| Scandwing OY | Hospitality | 2017 |
| SGM Militaria Oy | Wholesale & retail | 2017 |
| SH1 Management Oy | Professional & scientific | 2018 |
| SI TRADE Oy | Transport & logistics | 2019 |
| SJS Solutions Oy | Construction | 2020 |
| SLR Line Oy | Wholesale & retail | 2011 |
| SNNS Invest oy | Financial services | 2023 |
| SS Tirri Oy | Hospitality | 2012 |
| STR Tecoil Oy | Manufacturing | 2013 |
| Sv-Trans OY | Construction | 2007 |
| Saaramaan Sora Oy | Mining & quarrying | 2014 |
| Saimatic Oy | Construction | 1997 |
| Salmenkylän Hovi Oy | Hospitality | 2024 |
| Salmenkylän TB-Huolto Ky | Wholesale & retail | 1980 |
| Salpakirja Oy | Wholesale & retail | 2015 |
| Salvadanaio Oy | Financial services | 2011 |
| SamRent Oy | Real estate | 2024 |
| SaneerausLux Oy | Construction | 2025 |
| Satamansuoja Oy | Health & social care | 2024 |
| SatsaHoitaa Oy | Administrative & support | 2023 |
| Saunatarvike Sata Ky | Wholesale & retail | 1987 |
| Saybolt Finland Oy | Professional & scientific | 1985 |
| Scandinavian Cement Oy | Wholesale & retail | 2008 |
| Second June Oy | Transport & logistics | 1995 |
| Serdar-Ganim avoin yhtiö | Hospitality | 2016 |
| Serok avoin yhtiö | Hospitality | 2023 |
| Serola kiinteistöt Oy | Real estate | 2015 |
| Sevenon Oy | Manufacturing | 2005 |
| Shiny Ways Oy | Construction | 2023 |
| Silver Foxes Oy | Hospitality | 2019 |
| Simpson Capital Oy | Financial services | 2024 |
| Sino Ravintola Oy | Hospitality | 2025 |
| Sisustus Laventeli Oy | Wholesale & retail | 2008 |
| Soluni Oy | Wholesale & retail | 2015 |
| Sopimustili Ky | Professional & scientific | 2011 |
| Sorale oy | Hospitality | 2026 |
| Sovereign Oy | Real estate | 1990 |
| Spinnaker Logistics Oy | Transport & logistics | 2008 |
| Stani Oy | Wholesale & retail | 2003 |
| Step4ai Oy | Information & communication | 2023 |