| Mattikulma Oy | Construction | 2010 |
| Mattilan Murske Oy | Mining & quarrying | 2017 |
| Maxstor Oy | Wholesale & retail | 1997 |
| Mentaval Oy | Construction | 2020 |
| Metsäpalvelu Kymppi Oy | Agriculture & fishing | 2009 |
| Metsärahti Kivimäki Oy | Transport & logistics | 2006 |
| Mia Hair Group Ky | Education | 2010 |
| Mikaelin Salkku Oy | Financial services | 2024 |
| Mikamet Oy | Manufacturing | 2005 |
| Miksara Oy | Professional & scientific | 2025 |
| Mirinda Ky | Professional & scientific | 2012 |
| Mirios Oy | Health & social care | 2023 |
| Monitoimi Mattila Oy | Construction | 1988 |
| Mosarte Ky | Professional & scientific | 2007 |
| Mr Jolly Oy | Hospitality | 2025 |
| Musiikkiliike Musatalo Ky | Wholesale & retail | 1988 |
| Männistö Motorsport avoin yhtiö | Arts & recreation | 2022 |
| NS Tapahtumat Oy | Arts & recreation | 2019 |
| Nelosmaansiirto Oy | Construction | 2005 |
| Niesa Oy | Transport & logistics | 2005 |
| Night Owl Entertainment Oy | Real estate | 2022 |
| Nimat Oy | Construction | 2019 |
| Nimicon Oy | Professional & scientific | 2019 |
| Nordsystem oy | Construction | 2015 |
| Northcut Barber Oy | Other services | 2026 |
| Novoprint Oy | Manufacturing | 2000 |
| Numbers Company Oy | Professional & scientific | 2019 |
| OMA - Suunta ky | Health & social care | 2016 |
| Oasis Gym & Fitness Oy | Arts & recreation | 2024 |
| Oivatec Oy | Manufacturing | 2011 |
| Ojala Power Oy | Hospitality | 2021 |
| Olmu Tuonti Oy | Wholesale & retail | 2024 |
| Optikko Kangasniemi Oy | Wholesale & retail | 1974 |
| Ostamo Oy | Construction | 2014 |
| Oy Arundo Ab | Wholesale & retail | 1993 |
| Oy Shoepoint-Piqant Ltd | Manufacturing | 1997 |
| P & P Kulmala Oy | Hospitality | 1993 |
| PH-Devel Oy | Professional & scientific | 1991 |
| PH-Hotels Oy | Hospitality | 2015 |
| PJ Asunnot Oy | Construction | 2018 |
| PNJ Ravintola Oy | Hospitality | 2018 |
| PS Liiku Oy | Arts & recreation | 2007 |
| PadelCenter Kankaanpää Oy | Arts & recreation | 2021 |
| Pansian Puutarha Oy | Agriculture & fishing | 2006 |
| Parkanon Kenkäparooni Ky | Wholesale & retail | 1981 |
| Pauli Kuusikko Oy | Transport & logistics | 1989 |
| Pennion Oy | Real estate | 2015 |
| Pentti Korpela Oy | Wholesale & retail | 1984 |
| Petaco Team Oy | Professional & scientific | 1991 |
| Pevi Oy | Professional & scientific | 1989 |
| Pienrautakauppa Lauri Välimäki Ky | Wholesale & retail | 1982 |
| Pihlajan Vihannes Oy | Financial services | 1991 |
| Piian-Puoti Ky | Wholesale & retail | 1976 |
| Plus Katsastus Kankaanpää Oy | Professional & scientific | 2009 |
| Pohjois-Satakunnan Jätteidenkäsittely Oy | Water & waste | 1995 |
| Pohjois-Satakunnan Liikenne Oy | Transport & logistics | 2010 |
| Pohjois-Satakunnan Nuohouspalvelu Oy | Administrative & support | 2013 |
| Pohjois-Satakunnan Palloilu- ja Messukeskus Oy | Arts & recreation | 1996 |
| Pohjois-Satakunnan Taksipalvelu Oy | Transport & logistics | 2023 |
| Prinecap Oy | Financial services | 2002 |
| Priority Nordic Oy | Real estate | 2018 |
| Priority Properties Oy | Real estate | 2024 |
| ProJoPa Oy | Professional & scientific | 2013 |
| Proamer Oy | Manufacturing | 2022 |
| Promeco Group Oy | Real estate | 2008 |
| Promeco Oy | Manufacturing | 2003 |
| Proxfi Oy | Other services | 2021 |
| PsykoteRii Oy | Health & social care | 2026 |
| Purasen Parturit Ky | Other services | 1982 |
| Pursikumi, Lasse Pursiainen Ky | Wholesale & retail | 1982 |
| Pyynikin Laaturakennus Oy | Real estate | 2021 |
| RK-Pintakäsittely Oy | Manufacturing | 2022 |
| RK-Sijoitus Oy | Real estate | 2022 |
| Rahh Oy | Manufacturing | 2014 |
| Raiki Oy | Real estate | 2019 |
| Railetuote Oy | Administrative & support | 1973 |
| Raka Oy | Financial services | 2023 |
| Rakennusasennus Juha Tuomilaakso Oy | Construction | 2000 |
| Rakennusliike Elo Oy | Construction | 2013 |
| Rakennusliike Kulmala Oy | Real estate | 1974 |
| Rakennuspalvelu J. Helkamäki Oy | Construction | 2026 |
| Rakennuspalvelu TNH Oy | Construction | 2024 |
| Rakennustyö Haka Oy | Construction | 2021 |
| Rakennustyö J. Rajakallio Oy | Construction | 2007 |
| Raksanna Oy | Professional & scientific | 2020 |
| Ramak Oy | Construction | 2026 |
| Rauta Väisänen Oy | Wholesale & retail | 2006 |
| Rautapelto Oy | Wholesale & retail | 2022 |
| Ravintola Rivieera Oy | Hospitality | 2020 |
| Realty Group Oy | Real estate | 2021 |
| Reholution Oy | Professional & scientific | 2015 |
| Reijo Pihlajaniemi Oy | Transport & logistics | 1989 |
| Reino Rasimus Ky | Wholesale & retail | 1982 |
| Rengasville Ky | Wholesale & retail | 1999 |
| Reserver Oy | Wholesale & retail | 2026 |
| Riicafé Oy | Wholesale & retail | 2003 |
| Rivieera Oy | Hospitality | 2012 |
| Rosil Oy | Professional & scientific | 2025 |
| Rämeikkö Oy | Real estate | 1985 |
| SAB Oy | Hospitality | 2024 |