| Pintapro Oy | Construction | 2017 |
| Pirtakoti Oy | Health & social care | 2008 |
| Pirttimaan Tila Oy | Agriculture & fishing | 2026 |
| Pitopalvelu Makia Oy | Hospitality | 2023 |
| Pizzeria Romana Tornio Oy | Hospitality | 2022 |
| Pohjois-Suomen Rakennetekniikka Oy | Professional & scientific | 2011 |
| Pohjois-Suomen Soodapuhallus Oy | Construction | 2019 |
| Pohjolan Auto Oy | Wholesale & retail | 1984 |
| Pohjolan Mittarihuolto Oy | Manufacturing | 1990 |
| Pohjolan Talopalvelu Oy | Professional & scientific | 2020 |
| Polar Harmony Oy | Professional & scientific | 1994 |
| Polar Käämintä Oy | Manufacturing | 2014 |
| Polar Sun Oy | Transport & logistics | 2000 |
| Polar-Asuste Ky | Wholesale & retail | 1991 |
| Polar-Automaalaus Oy | Other services | 1986 |
| Polaris Kielipalvelut Oy | Professional & scientific | 2010 |
| Polarrail Oy | Construction | 2025 |
| Ponkalan Grilli-kioski Ky | Real estate | 1981 |
| Popet Oy | Real estate | 2022 |
| Porina Media Ky | Arts & recreation | 2017 |
| Pororanta Oy | Administrative & support | 2007 |
| Pro Pizza Oy | Hospitality | 2018 |
| ProArctic Miinala Oy | Construction | 2007 |
| Prones Oy | Professional & scientific | 1995 |
| Prou Holding Oy | Financial services | 2022 |
| Psydia Oy | Health & social care | 2023 |
| Puhelinmarkkinointi Heikkala Oy | Professional & scientific | 1981 |
| Puotikarin Telakka Oy | Real estate | 2012 |
| Puotikarin satama Oy | Arts & recreation | 1994 |
| PutKin Oy | Construction | 2022 |
| PyKri Oy | Real estate | 1989 |
| Pyöräosa Keinänen Oy | Other services | 1984 |
| Rajakoti OY | Real estate | 2007 |
| RIAR Group Oy | Financial services | 2025 |
| Rotkar OY | Financial services | 2024 |
| RPK-Palvelut Oy | Construction | 2012 |
| RST-Service Oy | Wholesale & retail | 2018 |
| RTL-Kiinteistöt Oy | Real estate | 2020 |
| RTM Service Oy | Wholesale & retail | 2024 |
| Raate Road Ltd Oy | Arts & recreation | 2026 |
| Raja Farma Oy | Wholesale & retail | 2023 |
| Raja-Asennus Ky | Construction | 2018 |
| Raja-Höylä Ky Ahti Friman | Manufacturing | 1981 |
| Raja-Katsastus Oy | Professional & scientific | 2021 |
| Raja-Tech Oy | Professional & scientific | 2016 |
| Raja-arvo Oy | Real estate | 2015 |
| RajaMilk Oy | Agriculture & fishing | 2019 |
| RajaPartners Oy | Professional & scientific | 2010 |
| Rajahinaus Oy | Transport & logistics | 2010 |
| Rajahuolto Oy | Other services | 1986 |
| Rajalla Autopesu Oy | Other services | 1994 |
| Rajalohi Kommandiittiyhtiö, Teuvo Heikkilä | Agriculture & fishing | 1981 |
| Rajamotor Ky | Wholesale & retail | 1998 |
| Rajan Auto Oy | Wholesale & retail | 2010 |
| Rajapesu Oy | Other services | 2017 |
| Rajatimpuri Oy | Construction | 2021 |
| Rajatori Oy | Wholesale & retail | 1995 |
| Rakennetuki Oy | Professional & scientific | 2008 |
| Rakennus Mykkälä Oy | Construction | 2023 |
| Rakennus Pelttari Oy | Construction | 2019 |
| Rakennus Raitam Oy | Construction | 2005 |
| Rakennus Wotsi Oy | Real estate | 1989 |
| Rakennus,-kalustetuotanto cmp-service Oy | Construction | 2013 |
| Rakennusliike Mäkikyröt | Construction | 1962 |
| Rakennusliike T. Myllyneva Oy | Construction | 2003 |
| Rakennuspalvelu Kenttä Oy | Construction | 2010 |
| Rakennuspalvelu MeilleKoti Oy | Construction | 2024 |
| Rakennuspalvelu Miinala Oy | Construction | 2006 |
| Rakennuspalvelu Mäkimaa Ky | Construction | 2011 |
| Rakennuspalvelu Ruottu Oy | Construction | 2016 |
| Rakennustoimisto Länsiraja Oy | Construction | 2020 |
| Rakennusurakointi L.Maijanen Oy | Construction | 2003 |
| Ramik Oy | Agriculture & fishing | 2013 |
| Rampe Invest Oy | Real estate | 2006 |
| Ramvip Oy | Construction | 2006 |
| Raneltek Oy | Professional & scientific | 1997 |
| Rasimus Corp. Oy | Financial services | 2011 |
| RautaTörmä Oy | Manufacturing | 2022 |
| Ravintola Jetset Oy | Hospitality | 2009 |
| Ravintola La Matta avoin yhtiö | Hospitality | 2022 |
| Ravipalvelu Aatsinki avoin yhtiö | Arts & recreation | 2007 |
| Recurso Oy | Wholesale & retail | 2018 |
| Refanchors Ky | Construction | 2012 |
| Reijo RH Huopana Oy | Transport & logistics | 2022 |
| Renata Flow Oy | Administrative & support | 2011 |
| Rengas- ja Autopalvelu Sailamaa Oy | Wholesale & retail | 2025 |
| Rentpa Oy | Administrative & support | 2022 |
| Revontuli-Valaisimet Ky | Wholesale & retail | 2001 |
| Rimara Oy | Financial services | 2000 |
| Risto Kolehmainen Oy | Construction | 2007 |
| Riston Sähkö & Kaakeli KY | | 2005 |
| Roi-Fi Oy | Real estate | 2009 |
| Rova Infra Oy | Construction | 2020 |
| Ryhmäliikuntakeskus Hyväfiilis Oy | Arts & recreation | 2010 |
| Rälläkkä-viihde Oy | Arts & recreation | 2012 |
| S.M barbershop Oy | Other services | 2024 |
| S.O. Import avoin yhtiö | Wholesale & retail | 1998 |
| Sadiq Ky | Hospitality | 2011 |
| SC Steel Oy | Manufacturing | 2024 |
| SEP21 Oy | Financial services | 1996 |