| Meri-Lapin Siivousässät Ky | Administrative & support | 2011 |
| Meri-Lapin Vuokratalli Oy | Real estate | 2022 |
| Meri-Lapin kuntapalvelut Oy | Hospitality | 2022 |
| Meri-Lapin musiikkiosuuskunta | Professional & scientific | 2013 |
| Meri-Lapin varmaverkkopalvelu Oy | Professional & scientific | 2021 |
| Merihovi Kiinteistöt Oy | Real estate | 2012 |
| Merike Finland Oy | Transport & logistics | 2017 |
| Merilapin Ilmastointipalvelu Oy | Construction | 2013 |
| Merilapin Kivi Oy | Manufacturing | 2011 |
| Merilapin Munkkitupa Ky | Manufacturing | 2019 |
| Merilapin moniurakointi Oy | Construction | 2026 |
| Merilapin vuokrakiinteistöt Oy | Construction | 2014 |
| Merilapinsora Oy | Transport & logistics | 2019 |
| Mervi Salmi Oy | Wholesale & retail | 2010 |
| Merx Polaris Oy | Professional & scientific | 1993 |
| Metsäkone Talus Oy | Agriculture & fishing | 2019 |
| Metsälumo Oy | Agriculture & fishing | 2025 |
| Mikrogate Oy | Wholesale & retail | 1994 |
| Millec Oy | Professional & scientific | 2021 |
| Minefy Oy | Information & communication | 2025 |
| Mionex Oy | Manufacturing | 1999 |
| Mon-Art Oy | Financial services | 1989 |
| Monialapalvelu Mika Ruotsalainen Oy | Wholesale & retail | 2014 |
| Monisuoja Oy | Wholesale & retail | 2011 |
| Mori Kemi Oy | Hospitality | 2022 |
| Moylyn Present Oy | Wholesale & retail | 2018 |
| Mustosen Lasi Ky | Manufacturing | 1990 |
| Muuraus & Rakennus Tapojärvi Oy | Construction | 2023 |
| Mäkipörhölän Taksit Oy | Transport & logistics | 2021 |
| Nadja &Toni Rakennus ja konsultointi Oy | Professional & scientific | 1992 |
| Nebraska Outdoor Oy | Wholesale & retail | 2017 |
| Nesta Nordic Kodit & Palvelut Oy | Information & communication | 2026 |
| NewWoodOpening Oy | Professional & scientific | 2018 |
| Niina Pekkala Oy | Professional & scientific | 2020 |
| Ninan Auto & Romu Oy | Other services | 2023 |
| Nintek Oy | Manufacturing | 2015 |
| Niskalan Radio-Sähkö Oy | Financial services | 1982 |
| Nomon Oy | Professional & scientific | 2016 |
| Nord AP solutions Oy | Professional & scientific | 2026 |
| NordAura Oy | Transport & logistics | 2025 |
| Nordcape Finland Oy | Wholesale & retail | 2007 |
| Nordic Blueprint Oy | Professional & scientific | 2026 |
| Nordic Haven Design Oy | Information & communication | 2022 |
| Nordic Nooks Oy | Hospitality | 2023 |
| Northern Avalance Oy | Other services | 2021 |
| Novetra Oy | Information & communication | 2006 |
| Nr myynti&välitys OY AB | Wholesale & retail | 2024 |
| Näykki & Kni Oy | Wholesale & retail | 1992 |
| OFR Oy | Construction | 2024 |
| OK Monipalvelu Oy | Wholesale & retail | 2023 |
| Orefields Raise Boring AB, filial i Finland | Mining & quarrying | 2018 |
| Orica Finland Oy | Wholesale & retail | 2010 |
| Osaajavuokraus KALLIO Oy | Manufacturing | 2016 |
| Osallisuus Oy | Professional & scientific | 2025 |
| Osaratas Kemi Oy | Other services | 2015 |
| Osaratas Kiinteistöt Oy | Real estate | 2015 |
| Ostos-Valinta om. Tuula ja Toivo Långström | Wholesale & retail | 1980 |
| Oulun Energia Kenve Oy | Energy | 2000 |
| Oy Bothnia Logistic Centre Ltd | Transport & logistics | 2001 |
| Oy H.Taanila Ab | Administrative & support | 2019 |
| Oy Jari Jussila Ab | Real estate | 1989 |
| Oy Kalottkonsult Ab | Professional & scientific | 1982 |
| Oy SatuGate Ab | Wholesale & retail | 2008 |
| P. Liimatainen Oy | Construction | 2006 |
| P. Rousu Ky | Wholesale & retail | 1982 |
| PIENI LANKAPUOTI avoin yhtiö | Wholesale & retail | 2004 |
| PK-Hitsaus-asennus Oy | Construction | 2012 |
| PL Trading Ky | Wholesale & retail | 1992 |
| Propharma OY | Health & social care | 2008 |
| PS Työt Oy | Transport & logistics | 2019 |
| PTiPrans oy | Transport & logistics | 2023 |
| Paanupaja Ky | Professional & scientific | 2010 |
| Paattion Lämpö Oy | Energy | 1976 |
| Padel Kemi Oy | Arts & recreation | 2022 |
| Palot-yhtiöt Oy | Real estate | 1972 |
| Palsatech Global Oy | Professional & scientific | 2020 |
| Palsatech Oy | Professional & scientific | 2014 |
| Paumat Oy | Transport & logistics | 1996 |
| Pekal Oy | Administrative & support | 2023 |
| Pekka Tolvanen Oy | Transport & logistics | 1995 |
| Perämeren Asunnot Oy | Real estate | 1989 |
| Perämeren Kiinteistöhuolto Oy | Administrative & support | 2017 |
| Petri Poutanen Ky | Construction | 2010 |
| Peurasaaren Lämpö Oy | Administrative & support | 1962 |
| Phung Oy | Hospitality | 1998 |
| Pihlajaniemi & Co Oy | Real estate | 2009 |
| Pilpurat Oy | Real estate | 2017 |
| Pizzeria Captain- Kemi Oy | Hospitality | 2026 |
| Planoy Oy | Professional & scientific | 2016 |
| Playfamily Oy | Education | 2024 |
| Pohjanmaan Hyötykäyttö Oy | Water & waste | 2002 |
| Pohjois-Suomen Laaturakentajat Oy | Construction | 2007 |
| Pohjolan Tuotemarkkinointi & Leimasin- ja mainospaino Ky | Professional & scientific | 1985 |
| Poltinhuolto Arto Niskala Oy | Manufacturing | 2013 |
| Polttoleikkaus Pukari Oy | Wholesale & retail | 1995 |
| Prima-Rauta R. Kamppinen Oy | Wholesale & retail | 1985 |
| ProTerveys Oy | Health & social care | 2007 |
| Proinse Oy | Professional & scientific | 2019 |
| Promote Oy | Professional & scientific | 2026 |
| Psychdrive oy | Education | 2021 |