| PRU Asbesti Oy | Construction | 2018 |
| PSG-Asennus Oy | Construction | 2016 |
| PTT Language Services Oy | Professional & scientific | 2018 |
| PV-Group Oy | Hospitality | 2005 |
| Padel kamut Oy | Arts & recreation | 2021 |
| Pajokka Oy | Wholesale & retail | 2005 |
| Pala-Nurkka Johanella Ky | Wholesale & retail | 1983 |
| Palsa Oy | Professional & scientific | 2023 |
| Palsa Palvelu Oy | Administrative & support | 2024 |
| Parter Oy | Professional & scientific | 2021 |
| Parturi-Kampaamo JT Salonki Jaana Tavi Oy | Other services | 2008 |
| Parturi-Kampaamo Konsultointi K. Turtiainen Oy | Other services | 1996 |
| Parturi-kampaamo Kameleontti Oy | Other services | 1998 |
| Parturi-kampaamo Sigrid Oy | Other services | 2019 |
| Pasi Nykänen Oy | Other services | 2013 |
| PataPub Oy | Hospitality | 2019 |
| Paulanketo oy | Wholesale & retail | 2019 |
| PaussiTupa Oy | Hospitality | 2025 |
| Paws & Son Oy | Wholesale & retail | 2021 |
| Pentti Räsänen Oy | Administrative & support | 2009 |
| Perhekeskus Taikametsä Oy | Health & social care | 2015 |
| Perkaus Oy | Transport & logistics | 1913 |
| Pesuhelmi Oy | Other services | 2015 |
| Pesutupa Pyykkimummo Ky | Other services | 1994 |
| Pete Willman Holding Oy | Financial services | 2018 |
| Phoenix Consulting Oy | Professional & scientific | 2023 |
| Pihlajaveden Kala Oy | Manufacturing | 2018 |
| PikkuPäivystys Oy | Health & social care | 2024 |
| Pilkkakosken Kiinteistöt Oy | Real estate | 1999 |
| Pinehousex Oy | Manufacturing | 1999 |
| Pitopalvelu Litmanen Ky | Hospitality | 1984 |
| Pix International Oy | Real estate | 1986 |
| Pizzeria Capero Oy | Hospitality | 2008 |
| Pohjukan-Pojat Oy | Construction | 2006 |
| Pomppu Oy | Arts & recreation | 1989 |
| Pop Capital Oy | Professional & scientific | 2018 |
| Pora-Ukot Oy | Wholesale & retail | 2020 |
| ProBeauty Center Oy | Other services | 2019 |
| Problema Oy | Professional & scientific | 2022 |
| Psykiatri- ja psykoterapiapalvelu Kaustio & Parviainen Oy | Health & social care | 2021 |
| Psykologipalvelu Hetki Oy | Health & social care | 2023 |
| Psykologipalvelut Kupiainen Oy | Health & social care | 2017 |
| Psykoterapia Uusi Ovi Oy | Health & social care | 2017 |
| Pub Ilo Oy | Hospitality | 2025 |
| Punkatalo Ky | Manufacturing | 1967 |
| Puro Healthcare Oy | Health & social care | 2012 |
| Puro tilat oy | Real estate | 2020 |
| Pursivuokraus Oy | Hospitality | 1990 |
| Puruveden kalasatama osuuskunta | Transport & logistics | 2006 |
| Puukkopaja Liukko Ky | Manufacturing | 1994 |
| Puusepänliike Rauno Heikkinen Ky | Manufacturing | 1979 |
| Päivi Nousiainen Oy | Professional & scientific | 2021 |
| Päivärannan Ruusu ja Hautauspalvelu Saari Oy | Other services | 1978 |
| RAU Capital Oy | Financial services | 2022 |
| RJM-Service Oy | Construction | 2011 |
| RM Etelä-Savo Oy | Wholesale & retail | 2019 |
| RM Hotels Oy | Manufacturing | 2012 |
| RT-tuotanto Oy | Arts & recreation | 2015 |
| Raita House Oy | Hospitality | 2009 |
| Rakennus ja Laatoitus JPL Turunen Oy | Construction | 2019 |
| Rakennus-Joka Oy | Construction | 2000 |
| Rakennusliike AsLa Oy | Construction | 2015 |
| Rakennusliike Kovaset Oy | Construction | 2011 |
| Rakennusliike P.Sorsa Oy | Construction | 1991 |
| Rakennuspalvelu JaKa Oy | Construction | 2019 |
| Rakennustarvike Luukkainen Oy | Wholesale & retail | 2012 |
| Rakennustyöt Lassi Uotinen Oy | Construction | 2009 |
| Rakennusurakat J Immonen Oy | Construction | 2008 |
| Rakennusurakointi S ja M Kaartinen Oy | Construction | 1997 |
| Rakentaja-Timpurit Esa Hirvonen Avoin yhtiö | Construction | 1994 |
| Rakentamista vaille oy | Construction | 2018 |
| Rallikainen Oy | Manufacturing | 2020 |
| Rantasalmen Hirsikehikko Ky | Manufacturing | 1981 |
| Rantasalmen Teräsrakenne Ky | Manufacturing | 1983 |
| Rauhan Kuru Oy | Hospitality | 2018 |
| Rauni Oy | Wholesale & retail | 1988 |
| Ravintola Deniz Avoin yhtiö | Hospitality | 2010 |
| Real-tilit Oy | Professional & scientific | 2013 |
| Record Breakers Oy | Arts & recreation | 2022 |
| RediGere Solutions Oy | Manufacturing | 2026 |
| Redoman Oy | Professional & scientific | 2003 |
| Reijon Palvelutaksi Oy | Transport & logistics | 2022 |
| Rekryluuri Oy | Administrative & support | 2004 |
| Relion Savonlinna Oy | Professional & scientific | 2006 |
| Remonttipalvelu Laatusan Oy | Construction | 2023 |
| Rengas-Ahertajat Oy | Wholesale & retail | 2010 |
| Rengas-Savotta Oy | Wholesale & retail | 1989 |
| Rengaspaja ja öljy Bros Oy | Other services | 2024 |
| Rent a Saimaa Oy | Administrative & support | 2025 |
| RepoRock Ky | Professional & scientific | 2002 |
| Repokiinteistöt Oy | Real estate | 2006 |
| Restamaster Oy | Manufacturing | 1992 |
| Retro Ky | Wholesale & retail | 2004 |
| Riemurytmi Oy | Education | 2011 |
| Riksataxi Savonlinna OY | Transport & logistics | 2020 |
| Rilas Oy | Administrative & support | 2007 |
| Ristimäenkadun Kiinteistöt Oy | Construction | 2002 |
| Ritostone Oy | Manufacturing | 2015 |
| Roberlan Oy | Real estate | 1993 |
| Rodime Oy | Wholesale & retail | 1992 |