| Kuljetus Pulju KY | Transport & logistics | 2007 |
| Kuljetusliike Inkerö Oy | Transport & logistics | 1986 |
| Kuljetusliike J. Ylianttila Ky | Transport & logistics | 1982 |
| Kuljetusliike Sääskilahti Oy | Transport & logistics | 1975 |
| Kustannusosakeyhtiö Sininen Jättiläinen | Information & communication | 2022 |
| KuuraVaara Oy | Arts & recreation | 2020 |
| Kuvaus ja suunnittelu Mainas Oy | Professional & scientific | 2020 |
| Kätevä Rakennus Oy | Construction | 2020 |
| LVI-Asennus J. Ryynänen Oy | Construction | 2010 |
| Lake Hut Safaris Oy | Administrative & support | 2025 |
| Lapin Amin Oy | Hospitality | 2020 |
| Lapin GPS-Mitta Oy | Professional & scientific | 1998 |
| Lapin Kiinteistö- ja Rakennuspojat Oy | Real estate | 2023 |
| Lapin Krassi Oy | Manufacturing | 1996 |
| Lapin Leijona Oy | Arts & recreation | 2007 |
| Lapin Lämpölinja Oy | Transport & logistics | 2004 |
| Lapin Putkihuolto Oy | Construction | 2025 |
| Lapin Ruokahuone Oy | Hospitality | 2017 |
| Lapin Terapia Polar Oy | Health & social care | 2025 |
| Lapin Tilataikuri Ky | Construction | 2013 |
| Lapin Tilisektori Oy | Professional & scientific | 2019 |
| Lapin Tilitoimisto Oy | Professional & scientific | 1975 |
| Lapin Tähdet Oy | Financial services | 2025 |
| Lapin Vakuutuskeskus Oy | Financial services | 1994 |
| Lapin Valmiste Oy | Manufacturing | 2020 |
| Lapin kuuloterveys Oy | Health & social care | 2021 |
| Lapin luonnontuotteet osk | Agriculture & fishing | 2018 |
| Lapin lämpösähkö Oy | Construction | 2024 |
| Lapin puunkaatopalvelut Oy | Agriculture & fishing | 2014 |
| Lapinlumi Oy | Education | 2023 |
| Lapintuntu Oy | Administrative & support | 2025 |
| LaplAid Oy | Health & social care | 2025 |
| Lapland Capital Oy | Financial services | 2022 |
| Lapland Silence Oy | Administrative & support | 2026 |
| Lapland Testing Oy | Transport & logistics | 2016 |
| Lapland Van Rentals Oy | Administrative & support | 2024 |
| Laplandia Travel Oy | Hospitality | 2011 |
| Lapland Dream Destinations Oy | Administrative & support | 2023 |
| Lapmusi Oy | Transport & logistics | 2025 |
| Lapp-Taksi Oy | Transport & logistics | 2024 |
| Lappi Pro Oy | Administrative & support | 2008 |
| Le Luxe Arctic Circle Oy | Other services | 2023 |
| LexSec Oy | Education | 2012 |
| Liiga Center Jässi Oy | Hospitality | 2015 |
| Liikennepalvelu E Romar Oy | Wholesale & retail | 1999 |
| Liikunta- ja kuntoutuspalvelut Rova & Kangas | Education | 2010 |
| Local Guide Lapland Oy | Administrative & support | 2024 |
| Lohiapaja Oy | Manufacturing | 2003 |
| Lohirannantien Maanrakennus Oy | Construction | 1995 |
| Lucky Aurora Oy | Administrative & support | 2024 |
| Lumidens Oy | Health & social care | 2018 |
| Lumikero oy | Real estate | 2019 |
| Lynx Racing Oy | Arts & recreation | 1995 |
| Löfman Trucking Oy | Transport & logistics | 2026 |
| M & M Nordic Oy | Transport & logistics | 2024 |
| M & V Koposet Oy Kuljetusliike | Transport & logistics | 1990 |
| M&M Tilausliikenne Ky | Transport & logistics | 2009 |
| M2 Aava Lappi Oy | Construction | 2021 |
| M2 Aava Oy | Real estate | 2020 |
| MAJ Forest Oy | Real estate | 2025 |
| METSÄPOIKELA Ky | Agriculture & fishing | 2011 |
| MH Rinne Oy | Wholesale & retail | 1996 |
| MInSam Oy | Real estate | 2026 |
| MK Meklarikeskus Oy | Financial services | 2012 |
| MMP Koneurakointi ja mittaus Oy | Real estate | 2020 |
| MP Resources Oy | Mining & quarrying | 2025 |
| MS-Kiinteistöt Oy | Financial services | 2006 |
| MVR Solutions Oy | Professional & scientific | 2021 |
| MY-Aihki Oy | Construction | 1979 |
| Maanrakennus EKI OY | Construction | 2014 |
| Maanrakennus Malinen Oy | Construction | 2016 |
| Maanrakennus ja Louhinta Siitonen Oy | Construction | 1980 |
| Maansiirtoliike Juhani Niemelä Ky | Administrative & support | 1988 |
| Maatiili Ky | Construction | 1986 |
| Maistuvat Hetket Oy | Administrative & support | 2024 |
| Makon Oy | Professional & scientific | 2020 |
| Marjala Holding Oy | Professional & scientific | 2025 |
| Master of Ceremony MC Oy | Administrative & support | 1991 |
| Maxitop Oy | Real estate | 1995 |
| Medunga OY | Health & social care | 2016 |
| Merle Soppela Oy | Professional & scientific | 2012 |
| Metsäkiinteistövälitys Ulla Käkelä LKV Ky | Real estate | 2021 |
| Midnight Sun Wake Oy | Arts & recreation | 2018 |
| Mikorec Oy | Real estate | 1992 |
| Monipalvelu Laitinen OY | Construction | 2026 |
| Moski Oy | Wholesale & retail | 1992 |
| Mr. Rinne Oy | Real estate | 2011 |
| Muon Solutions Oy | Professional & scientific | 2016 |
| Myyntikone Oy | Professional & scientific | 2008 |
| Mökkitohtori Ky | Professional & scientific | 2007 |
| NJK Palvelut Oy | Administrative & support | 2022 |
| NKK Invest Oy | Financial services | 2025 |
| Naamajärvi Invest Oy | Professional & scientific | 2025 |
| Naisterveys Oy | Health & social care | 2023 |
| Naka Consulting Oy | Professional & scientific | 2016 |
| Napapiirin Arvokiinteistöt Oy | Real estate | 1997 |
| Napapiirin Karkkitupa Ky | Wholesale & retail | 1998 |
| Napapiirin Matkamuisto Oy | Wholesale & retail | 2024 |
| Napapiirin Saarituvat Ky | Hospitality | 1972 |
| Napapiirin Suunnittelu Oy Napark | Professional & scientific | 1995 |