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| Metso Finland OY | Fi-02230 Espoo | 2022 |
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| Meyerpro AS | Haugesund | 2011 |
| Meyers Vaskeservice AS | Fredrikstad | 2020 |
| MF Event AS | Oslo | 2021 |
| MF Transport Service AS | Hommelvik | 2007 |
| MFD Rail Asset GmbH | Ch-6343 Rotkreuz | 2024 |
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| Mfix AS | Oslo | 2025 |
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| Mfre Holding AS | Søgne | 2021 |
| MG Drift AS | Fåvang | 2024 |
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| MG Holdning AS | Oslo | 2021 |
| MG Multiservice AS | Oslo | 2023 |
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| MG Subsea Services Ltd | Somerset Ta8 1Al | 2012 |
| MG Vibrations Da | Oslo | 2015 |
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| MGR Commercial Services Ltdl | Cleveland Ts12 1Jz | 2014 |
| MGW Gleis- & Weichenbau-Gesellschaft MBH & Co.Kg | De-10243 Berlin | 2009 |
| MH C Group | Dk-9200 Aalborg Sv | 2023 |
| MH Maskinutleie AS | Sandnes | 2017 |
| MH Utleie AS | Oslo | 2016 |
| MHG Equipment AS | Kopervik | 2000 |
| Mhi Holding AS | Oslo | 2025 |
| MHM AS | Oslo | 2015 |
| MHP Service V/Mick Hartmann Pedersen | Dk-2720 Vanløse | 2014 |
| MHT Bruktsalg & Reolutleie AS | Kristiansand S | 2020 |
| MHT Services AS | Stavanger | 2024 |
| Mibau Holding GmbH | Jelsa | 2010 |
| Michel Vanden Heede | 8573 Anzegem | 2010 |
| Micheles Renhold AS | Oslo | 2023 |
| Michelsen Service AS | Søreidgrend | 2020 |
| Micodan | Skui | 2008 |
| Micosa AS | Haddal | 2007 |
| Micro Drift AS | Lørenskog | 2012 |
| Micro Motion, Inc. | 80330 Boulder Colorado | 2013 |
| Microlease PLC | Harrow Ha1 4Tr | 2014 |
| Microlight Norway AS | Løfallstrand | 2024 |
| Micropack (Engineering) Ltd | Aberdeen Ab12 4Rr | 2012 |
| Mid - Norway Adventure AS | Meråker | 2007 |
| Mida Sol AS | Randaberg | 2005 |
| Mideast Ship Management Ltd | Bergen | 2000 |
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| Midnight Storm AS | Tornes I Romsdal | 2012 |
| Midnight Sun Adventures Da | Narvik | 1998 |
| Midnight Sun Mountain Guides Troms AS | Tromsdalen | 2025 |
| Midnightsun Tourist Service AS | Lakselv | 2017 |
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| Midt Factoring A/S | 7430 Ikast | 2023 |
| Midt Multiservice AS | Trondheim | 2023 |
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| Midt Teknisk AS | Verdal | 2019 |
| Midt Telemark Utleie AS | Notodden | 2020 |
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| Midt-Norsk Kran AS | Verdal | 2017 |
| Midt-Norsk Salgssenter AS | Trondheim | 2026 |
| Midt-Norsk Tak Og Fasadevask AS | Flatåsen | 2024 |
| Midt-Norsk Vask AS | Flatåsen | 2016 |
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| Midtnorsk Renhold & Transport AS | Trondheim | 2021 |
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| Mik Renhold Service AS | Lørenskog | 2016 |
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| Mike MK AS | Sandnes | 2022 |
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| Mikkelsen DH AS | Oslo | 2021 |
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| Miko Innovasjon AS | Fagerstrand | 2018 |
| Mikstor AS | Hamar | 2003 |
| Milarex AS | Oslo | 2017 |
| Milargo Norway Holding AS | Oslo | 2022 |
| Milde & Hauge Ans | Strandvik | 2011 |
| Mile Mobility AS | Lillehammer | 2021 |
| Milele Journeys AS | Kristiansand S | 2015 |