| Porkkanapirtti Ky | Health & social care | 2001 |
| Porrassalmenranta Ky | Hospitality | 2003 |
| Porrassalmi-yhtiö Oy | Professional & scientific | 2009 |
| Primonitor Oy | Health & social care | 2012 |
| Print & Publishing Consults Ky Timo Korppi | Information & communication | 1982 |
| Pro Navigation Services Ky | Professional & scientific | 2010 |
| Pro Scriptum Oy | Professional & scientific | 1989 |
| Pro Ski Center Oy | Wholesale & retail | 2009 |
| Pro-MM Oy | Real estate | 1974 |
| ProVire Avoin yhtiö | Arts & recreation | 2013 |
| ProWave Oy | Transport & logistics | 2019 |
| Proefit Oy | Professional & scientific | 2024 |
| Profilforum Ky | Wholesale & retail | 2006 |
| Prolink Oy | Real estate | 1993 |
| Prorex Oy | Wholesale & retail | 2004 |
| Psykologipalvelut Pia Marttala Ky | Health & social care | 2021 |
| Pub Stoori, Avoin yhtiö | Hospitality | 2005 |
| Puistokukka Katri Rantalainen Ky | Wholesale & retail | 2009 |
| Purtava Box Oy | Hospitality | 2026 |
| Purujärven tukki Oy | Agriculture & fishing | 2021 |
| Putkiapu Riikonen Oy | Construction | 2017 |
| Puu ja Kiinteistö Ky Puikkonen | Wholesale & retail | 1981 |
| PuuAsiamies J & P Oy | Administrative & support | 2011 |
| Puulan Aurinkoranta avoin yhtiö | Hospitality | 2014 |
| Puulapuu Oy | Wholesale & retail | 1997 |
| Puumalan Helmi Oy | Real estate | 2022 |
| Puumalan Kauppaosuuskunta | Wholesale & retail | 1929 |
| Puuni Oy | Information & communication | 2019 |
| Puusepänliike Pinelli, avoin yhtiö | Construction | 1990 |
| Puusepänliike Pro Joinery Hämäläinen Ky | Construction | 1999 |
| Puuskansaari Oy | Financial services | 2021 |
| Puutarhamyymälä Gardenia Oy | Wholesale & retail | 2018 |
| Puutavarakuljetus Lasse Paasonen Ky | Transport & logistics | 1980 |
| Puutimpurit Ky T Laitinen | Construction | 1997 |
| Pyryn talot Oy | Real estate | 2006 |
| Päiväkoti Huiskilo Oy | Education | 2016 |
| Pöntinen Group Oy | Administrative & support | 2010 |
| Pörsiö Oy | Real estate | 2020 |
| Qapri Oy | Wholesale & retail | 2020 |
| Quan Oy | Hospitality | 2019 |
| Queen way oy | Other services | 2024 |
| Qumos Oy | Information & communication | 2013 |
| R-Tili ja Tuote Ky | Professional & scientific | 1990 |
| R.Björkman Oy | Financial services | 1990 |
| RBR-tieisännöinti Oy | Real estate | 2015 |
| RD-Klaani Oy | Professional & scientific | 2024 |
| REIM Mikkeli Oy | Real estate | 1989 |
| RJ Yhtiö Oy | Transport & logistics | 2016 |
| RKS Group Oy | Construction | 2014 |
| RL-Yhtiöt Oy | Construction | 2010 |
| RM Ceto Oy | Real estate | 2018 |
| RM-Wauhtipyörä Oy | Wholesale & retail | 1997 |
| ROTSFIX Oy | Manufacturing | 2018 |
| RPI Oy | Construction | 2022 |
| RSL Consulting Oy | Professional & scientific | 2021 |
| Raa Creative Oy | Professional & scientific | 2024 |
| Rahim Oy | Hospitality | 2023 |
| Rahoitustie Oy | Wholesale & retail | 2024 |
| Rak-Ma-La Oy | Construction | 1983 |
| Rakennus M.Oinonen Oy | Construction | 2014 |
| Rakennus- ja Remontointi J. Hänninen Ky | Construction | 2008 |
| Rakennusasennus J Raatikainen kommandiittiyhtiö | | 1983 |
| Rakennusliike Kotipesä Oy | Construction | 2026 |
| Rakennusliike Ola Oy | Construction | 2002 |
| Rakennusliike Paloniitty Oy | Construction | 2007 |
| Rakennusliike RANIRA Oy | Construction | 2015 |
| Rakennuspalvelu J Häyrinen Oy | Professional & scientific | 2021 |
| Rakennuspalvelu RI - LI OY | Construction | 2017 |
| Rakennustaiturit Oy | Construction | 2010 |
| Rakennustoimisto Aripe Oy | Real estate | 1995 |
| Rakennustoimisto Valiotalo Oy | Construction | 2010 |
| Rakennusurakointi A. Karjalainen Ky | Wholesale & retail | 1996 |
| Rakennusyhtymä Risto Takkinen Ky | Construction | 1989 |
| Ramin Konditoria Kahvila Oy | Hospitality | 2004 |
| Randelin Palvelut Oy | Administrative & support | 2020 |
| Rantakone Oy | Wholesale & retail | 1992 |
| Rantakylän Kiviravintolat Ky | Hospitality | 1993 |
| Rantakylän Rakennustarvike Oy | Wholesale & retail | 2005 |
| Raskasasennus & Recycling Oy | Manufacturing | 2017 |
| Rateva Group Oy | Water & waste | 1973 |
| Ratmakka Oy | Information & communication | 2018 |
| Ratsastuskeskus Villit Oy | Arts & recreation | 2021 |
| Ratsukko Solutions Oy | Information & communication | 2020 |
| Rauta Juhinna Oy | Wholesale & retail | 2021 |
| RavenLine OY | Transport & logistics | 2025 |
| Ravintola Curry Time Oy | Hospitality | 2022 |
| Ravintola Fernando Oy | Hospitality | 1993 |
| Ravitalli J. Ristimäki Avoin Yhtiö | Arts & recreation | 2005 |
| ReadNest Oy | Wholesale & retail | 2025 |
| Reanor Oy | Financial services | 1993 |
| Rebemol Oy | Arts & recreation | 2024 |
| Reduko Oy | Professional & scientific | 1992 |
| Regio Asennus Oy | Wholesale & retail | 2023 |
| Regio Myynti Oy | Wholesale & retail | 2023 |
| Regio Oy | Wholesale & retail | 2019 |
| Regio Tukku Oy | Wholesale & retail | 2023 |
| Reguspatof Oy | Professional & scientific | 2019 |
| Rejlers Finland Oy | Professional & scientific | 1989 |
| Relanderin Ponitalli Ky | Education | 1994 |
| Restaboys Hummany Ky | Hospitality | 1985 |