| Lille Budda AS | Health & social care | 2012 |
| Lille Rosin AS | Real estate | 2000 |
| Logebygget AS | Real estate | 1992 |
| Losa AS | Education | 2024 |
| Lyd Og Bilde Ans | Administrative & support | 1992 |
| Låsesmeden Finnsnes AS | Wholesale & retail | 2017 |
| Løkke & Lamo Maskin AS | Construction | 2024 |
| M Torp Holding AS | | 2021 |
| M-L Holding AS | | 2023 |
| M.R. Eiendom AS | Hospitality | 2025 |
| M.R. Holding AS | Hospitality | 2022 |
| Mace Holding Finnsnes AS | Health & social care | 2021 |
| Man With a Plan AS | Professional & scientific | 2023 |
| Marinaen Båt Og Fritid AS | Wholesale & retail | 2007 |
| Maskin Og Anlegg AS | Construction | 1979 |
| MASTERBARBERSHOP21 AS | Other services | 2025 |
| Mastma Eiendom AS | Real estate | 2018 |
| Mathiassen Eiendom AS | Real estate | 2000 |
| Mathiassen Ventilasjon- Blikkenslager AS | Construction | 2006 |
| Maxi Finnsnes AS | Construction | 2023 |
| Maxi Tjenester Ans | Agriculture & fishing | 2004 |
| MBC AS | Real estate | 2024 |
| Mdco Finnsnes AS | Health & social care | 2013 |
| Metodistkirken Eiendom Finnsnes AS | Real estate | 2001 |
| Midt-Troms Betongpumping AS | Construction | 2023 |
| Midt-Troms Data AS | Information & communication | 1975 |
| Midt-Troms Gravemaskin AS | Construction | 1987 |
| Midt-Troms Revisjon AS | Professional & scientific | 2003 |
| Midt-Troms Taxi SA | Other services | 1995 |
| Midt-Tromshallen AS | Arts & recreation | 1996 |
| Midtfylket Eiendom AS | Real estate | 2024 |
| Midtfylket Eiendom II AS | Real estate | 2024 |
| Midtfylkets Trelastutsalg AS | Real estate | 1979 |
| Miklagard Studios AS | Information & communication | 2025 |
| Milano Finnsnes AS | Hospitality | 2013 |
| Mitra AS | Health & social care | 1994 |
| Mitra Holding AS | Real estate | 2022 |
| MJ Rørservice AS | Construction | 2026 |
| MLH AS | | 2020 |
| Mli AS | | 2020 |
| MMG Drift AS | Hospitality | 2012 |
| MNG Holding AS | | 2025 |
| Moddi & Kajsa Balto AS | Information & communication | 2024 |
| Moeggen Event Nuf | Wholesale & retail | 2014 |
| Moen Marked AS | Professional & scientific | 2008 |
| Moland Total AS | Construction | 2013 |
| Mortenson Invest AS | | 2021 |
| Motley Denim Norge AS | Wholesale & retail | 2013 |
| Multiservice Troms AS | Wholesale & retail | 2013 |
| Mve AS | Real estate | 2021 |
| Myre Elektro Butikk AS | Wholesale & retail | 1996 |
| Myre Møbler AS | Wholesale & retail | 1990 |
| Møllers Autoprodukter AS | Wholesale & retail | 1985 |
| Nautik Elektronikk AS | Construction | 2000 |
| NF Drift AS | Construction | 2019 |
| Nilsens Invest AS | Real estate | 2021 |
| Nilssen Maskin & Transport AS | Manufacturing | 2021 |
| NLM Eiendom Tromsø AS | Real estate | 1971 |
| NMC Active AS | Wholesale & retail | 2006 |
| NN Betong Saging/Kjerneboring AS | Mining & quarrying | 2016 |
| Nor Lines Finnsnes AS | Transport & logistics | 2011 |
| Nor Team Eiendom AS | Real estate | 2017 |
| Nor Team Entreprenørforretning AS | Construction | 1980 |
| Nord Vei & Asfalt Holding AS | | 2025 |
| Nord-Norsk Teknologi AS | Information & communication | 2007 |
| Nord-Norsk Trafikksenter AS | Education | 2001 |
| Nordborg Skoler AS | Education | 2005 |
| Nordmarkveien SA | Real estate | 1999 |
| Nordnorsk Boavvikling Ans | Wholesale & retail | 2004 |
| Nordvik's Invest AS | Construction | 2005 |
| Norsk Boligutvikling AS | Real estate | 2013 |
| Norsk Eiendom Og Utvikling AS | Real estate | 2021 |
| Norsk Industrikraft AS | Manufacturing | 2009 |
| Northern Nature Guides SA | Administrative & support | 2010 |
| Nte Holding AS | Construction | 2005 |
| Nård AS | Hospitality | 2024 |
| Næringshagen Midt-Troms AS | Professional & scientific | 1999 |
| Næringsparken Senja AS | Real estate | 2019 |
| O&S Maskin AS | Construction | 2013 |
| Ocra Eiendom AS | Real estate | 2024 |
| Oddli AS | Real estate | 2006 |
| Odin Development AS | Information & communication | 2024 |
| Oj Maskin & Transport AS | Transport & logistics | 2007 |
| Olderhamna Eiendom AS | Real estate | 2021 |
| Olderhavna Fiskerihavn AS | Transport & logistics | 2022 |
| Omega Brannvern AS | Professional & scientific | 2011 |
| Omega Holding AS | Professional & scientific | 2023 |
| Orb Holding AS | | 2023 |
| Orion AS | Wholesale & retail | 1992 |
| Othelie AS | Real estate | 2015 |
| Ottar AS | Manufacturing | 2015 |
| Ottos AS | Hospitality | 1991 |
| Panto Holding AS | Financial services | 2009 |
| Pe-Le Invest AS | Real estate | 2005 |
| Pedersen Bakeri Finnsnes AS | Manufacturing | 2026 |
| Peol AS | Hospitality | 1994 |
| Petimeter AS | Real estate | 2021 |
| Peto Maskin Ans | Construction | 1995 |
| Pettersen Bygg AS | Construction | 2013 |
| Pettersen Transport AS | Transport & logistics | 2014 |