| M Thorp Consulting AS | Professional & scientific | 2022 |
| M Tolley AS | Administrative & support | 2014 |
| M Tonheim Holding AS | Financial services | 2018 |
| M Utvikling AS | Professional & scientific | 2024 |
| M&A Accounting 26 AS | Professional & scientific | 2026 |
| M&A Corporate Advisors AS | Professional & scientific | 2007 |
| M&A Eiendom AS | Real estate | 2012 |
| M&A Molvær Holding AS | Health & social care | 2024 |
| M&A Rådgivning AS | Professional & scientific | 2025 |
| M&A Ventures AS | | 2026 |
| M&Aa. Invest AS | Real estate | 2012 |
| M&B Market AS | Other services | 2017 |
| M&B Mobil Og Data AS | Other services | 2018 |
| M&H Invest AS | Financial services | 2007 |
| M&K Eiendom AS | Real estate | 1999 |
| M&K Invest AS | | 2018 |
| M&K Rør AS | Construction | 2025 |
| M&L Holding AS | Hospitality | 2019 |
| M&M Bygg Og Renovering AS | Construction | 2025 |
| M&M Consulting AS | Professional & scientific | 2023 |
| M&M Global Shop AS | Wholesale & retail | 2026 |
| M&M Kapital AS | Other services | 2024 |
| M&M Property AS | Real estate | 2025 |
| M&M Utvikling AS | | 2021 |
| M&M&M AS | Professional & scientific | 2019 |
| M&M's Holding AS | Financial services | 2018 |
| M&Me Invest AS | | 2021 |
| M&N Investment Group AS | | 2023 |
| M&P - Biz Ans | Wholesale & retail | 2004 |
| M&R Invest AS | Financial services | 2012 |
| M&R Pioneer AS | | 2021 |
| M&S Capital Da | Wholesale & retail | 2024 |
| M&T Byggetjenester Ans | Construction | 2006 |
| M&V Holding AS | Health & social care | 2023 |
| M&V Loky AS | Agriculture & fishing | 2026 |
| M&V Norwins Limited | Administrative & support | 2021 |
| M-D Eiendom AS | Real estate | 1987 |
| M-Files Norway AS | Administrative & support | 2022 |
| M-Flyt AS | Information & communication | 2017 |
| M-Glass Og Bygg AS | Construction | 2025 |
| M-Lager Invest AS | Wholesale & retail | 2024 |
| M-S-P AS | | 2023 |
| M-Shop Norge AS | Manufacturing | 1998 |
| M-Takst AS | Professional & scientific | 2022 |
| M. Bergsprekken Holding AS | Real estate | 2020 |
| M. Brustad Invest AS | Wholesale & retail | 2020 |
| M. Haraldsen Holding AS | | 2015 |
| M. Johannesen Rådgivning Ltd Nuf | Professional & scientific | 2010 |
| M. Jul Halvorsens Gate 41 AS | Real estate | 2015 |
| M. Liset Holding AS | | 2022 |
| M. Lorentsen Holding AS | | 2026 |
| M. Piene Invest AS | Financial services | 2010 |
| M. Rostad Holding AS | Construction | 2018 |
| M. Sohrabi Eiendom AS | Real estate | 2021 |
| M. Sterner Holding AS | | 2025 |
| M.A Holding AS | Financial services | 2018 |
| M.A. Diamonds AS | Manufacturing | 2011 |
| M.A.C. AS | Financial services | 2015 |
| M.A.D AS | Education | 2012 |
| M.A.Ler Mbayed AS | Construction | 2021 |
| M.A.R.S. AS | Arts & recreation | 2018 |
| M.B Shoes AS | Wholesale & retail | 2011 |
| M.Bakken Invest AS | | 2017 |
| M.Berthou Service AS | Transport & logistics | 2018 |
| M.Christiansen Holding AS | Education | 2024 |
| M.Door AS | Manufacturing | 2024 |
| M.E.K. Holding AS | | 2026 |
| M.Foss Invest AS | | 2021 |
| M.H Holding AS | Real estate | 2021 |
| M.H.Jakhelln AS | | 1996 |
| M.H.L Holding AS | Professional & scientific | 2022 |
| M.H.S. Holding AS | | 2023 |
| M.Holding AS | Professional & scientific | 2017 |
| M.I.N Invest AS | | 2023 |
| M.Johannessen AS | Health & social care | 2011 |
| M.K Auto AS | Wholesale & retail | 2025 |
| M.K. Restaurant & Pub AS | Hospitality | 2026 |
| M.Kaasa Holding AS | Information & communication | 2023 |
| M.L.Tjenster AS | Transport & logistics | 2025 |
| M.Mithassel Holding AS | Real estate | 2019 |
| M.R Pos AS | Wholesale & retail | 2012 |
| M.S.H Holding AS | | 2025 |
| M.S.K.O Bygg AS | Construction | 2020 |
| M.T.J.S Invest AS | | 2025 |
| M.U.D. Holding AS | Other services | 2015 |
| M.Økels AS | | 2024 |
| M/K Kvittind AS | Financial services | 2015 |
| M/O Holding AS | Financial services | 2018 |
| M1 Invest AS | | 2018 |
| M11 Oppdal AS | Real estate | 2018 |
| M12 Datter AS | Hospitality | 2017 |
| M12 Holding AS | Real estate | 2016 |
| M12 Mor AS | Hospitality | 2017 |
| M12 Vest AS | Hospitality | 2024 |
| M14 Smia AS | Real estate | 2019 |
| M16 Næring AS | Real estate | 2018 |
| M2 Agenturer AS | Wholesale & retail | 2013 |
| M2 Consult AS | Real estate | 2018 |
| M2 Holdco AS | | 2026 |
| M2 Norge AS | Information & communication | 2014 |