| Miettinen-Hyvönen Oy | Manufacturing | 2025 |
| Miro's Car Service Oy | Other services | 2012 |
| Moduco Oy | Information & communication | 2003 |
| Moonmanage Oy Ltd | Information & communication | 2025 |
| Motorbeibi Ky | Other services | 2009 |
| Musiikkikahvila Kukkakeidas Oy | Hospitality | 2022 |
| Musta Oranki Oy | Other services | 2023 |
| Myyntipro Oy | Wholesale & retail | 2022 |
| N & H Capital Oy | Real estate | 2019 |
| NN-Works Oy | Administrative & support | 2016 |
| NPS Inspection Oy | Professional & scientific | 2013 |
| NPS Power Oy | Manufacturing | 2016 |
| NSS Invest Oy | Real estate | 2019 |
| NUTE Training Oy | Arts & recreation | 2020 |
| Napoli Bistro Oy | Hospitality | 2026 |
| Natemppo Oy | Wholesale & retail | 2023 |
| Natural Applications Nordic Oy | Information & communication | 2020 |
| Nautinto Bakery Oy | Manufacturing | 2020 |
| Nautione Oy | Manufacturing | 2011 |
| Nemeko Oy | Hospitality | 1993 |
| NeoCodex Oy | Information & communication | 1998 |
| Nevest Oy | Real estate | 2022 |
| Newcontrol Oy | Wholesale & retail | 1996 |
| Niemilomat Ky | Hospitality | 2018 |
| Nina Gereli Innovation Ky | Professional & scientific | 2016 |
| Niskanen Oy LKV | Real estate | 1984 |
| Nordic Power Service Oy | Manufacturing | 2011 |
| Nordic Quality Group Oy | Administrative & support | 2026 |
| Nosto ja Kuljetus Janhunen Oy | Transport & logistics | 2004 |
| Nosturipalvelu Tiitinen Oy | Construction | 2015 |
| Nuohouspalvelu NokiSet Oy | Administrative & support | 2018 |
| Nuohouspalvelu Nokitiimi Oy | Administrative & support | 2015 |
| Nyyssönen partners Oy | Professional & scientific | 2026 |
| Näkyville Oy | Professional & scientific | 2019 |
| OKE Invest Oy | Real estate | 2009 |
| OS Automation Oy | Professional & scientific | 1994 |
| Oliveiras Invest & Consulting Oy | Professional & scientific | 2018 |
| Orcon Oy | Manufacturing | 2006 |
| Osuuskunta LähiSavo | Wholesale & retail | 2016 |
| Osuuskunta Revontulikuu | Arts & recreation | 2018 |
| Oulun Nostopalvelu Kurko Koponen Oy | Construction | 2022 |
| Oy Clean Flame Ltd | Manufacturing | 1986 |
| Oy EkaMarket Ab | Wholesale & retail | 2024 |
| Oy Just Ice Ltd | Professional & scientific | 2006 |
| Oy Optitrans Ltd | Transport & logistics | 1993 |
| Oy Ramble On Global Ltd | Administrative & support | 2023 |
| Oy TopCargo Ltd | Transport & logistics | 2019 |
| Oy Varkauden Rellunkulma | Wholesale & retail | 1989 |
| PFH Invest Oy | Professional & scientific | 2020 |
| PJU Energy Consulting Oy | Information & communication | 2011 |
| PKM Hitsaus Oy | Construction | 2008 |
| PMK-Kiinteistöt Oy | Real estate | 1998 |
| Poleg VM OY | Wholesale & retail | 2023 |
| POP Asunnot Oy LKV | Real estate | 2008 |
| PS Field Supervisor Ky | Professional & scientific | 2006 |
| PS Pulkkinen Ky | Wholesale & retail | 1997 |
| PT-Palontorjuntapalvelu Oy | Administrative & support | 1985 |
| Painepinta Ky | Manufacturing | 2012 |
| Pajan Palvelut Oy | Construction | 2023 |
| Panssaripaja | Construction | 2020 |
| Parketti- ja huoneistoremontointiliike V. Herranen Ky | Construction | 1987 |
| Pe-MiCo Oy | Professional & scientific | 2023 |
| PeKaMaRi Oy | Real estate | 2021 |
| Peak Power Service Oy | Manufacturing | 2023 |
| Peak Welding Service Oy | Manufacturing | 2023 |
| Pekka Wasenius Oy | Construction | 2006 |
| Pelcone Kiinteistöt Oy | Real estate | 2023 |
| Pelikahvila Kurko Oy | Arts & recreation | 2020 |
| Penkki-Pukimo Avoin yhtiö R.Nykänen ja K:nit | Manufacturing | 1977 |
| Penpek Oy | Wholesale & retail | 1989 |
| Perhe Ikonen Oy | Construction | 2008 |
| Perhepalvelut HelKa Oy | Health & social care | 2016 |
| Pertti Mikkonen ky | Transport & logistics | 1989 |
| Pieksämäen Autotalo Oy | Real estate | 2007 |
| Pienkoneurakointi Karjalainen Ky | Construction | 2009 |
| Pikatek Oy | Wholesale & retail | 1989 |
| Pink Dent Oy | Health & social care | 2023 |
| PinkFix ky | Administrative & support | 2012 |
| Pintapari Oy | Construction | 2022 |
| Pirkon Puhdistus Oy | Administrative & support | 1986 |
| Pithia Oy | Administrative & support | 2025 |
| Pizzaposti Varkaus avoin yhtiö | Hospitality | 2020 |
| Pohjois-Savon Tilipalvelut Oy | Professional & scientific | 2019 |
| Posipoli Oy | Financial services | 1997 |
| Presto Stand Ky | Manufacturing | 1987 |
| Print Aut Ky | Information & communication | 1990 |
| Pro-Capture Oy | Professional & scientific | 2007 |
| Projekti- ja Yrityspalvelu Pulkkinen Oy | Professional & scientific | 2002 |
| Prosare Ky | Administrative & support | 2016 |
| Prosauna Oy | Manufacturing | 2015 |
| Protoel Oy | Construction | 2012 |
| Psykoterapia Katri Ruuskanen Oy | Health & social care | 2023 |
| Pumppuparoni Oy | Construction | 2023 |
| Puotinen Consulting Oy | Professional & scientific | 2026 |
| Puuhapoeka Ky | Construction | 2009 |
| Puutavara Semeika Oy | Manufacturing | 1997 |
| Päiviönsaaren Grilli Oy | Hospitality | 2026 |
| Pääkaupunkiseudun Isännöitsijät Oy | Real estate | 2016 |
| Rakki Mafia OY | Wholesale & retail | 2025 |
| RBI Finland Oy | Agriculture & fishing | 2017 |