| MH Interiør Og Boligfornying AS | Bergen | 2025 |
| MH Maskin & Service AS | Masfjordnes | 2024 |
| MH Maskin AS | Storforsheia | 2018 |
| MH Snekkerservice AS | Melandsjø | 2017 |
| MH Vei Og Anleggstjenester AS | Lyngdal | 2019 |
| Mh-Aktiva AS | Skien | 2021 |
| Mh-Service AS | Etne | 2023 |
| MHF Mark & Husförsäljning AB | Oslo | 2009 |
| MHK Holding AS | Tønsberg | 2021 |
| MHM Entreprenør & Service AS | Fyresdal | 2017 |
| Mi Bygg & Mesterbedrift AS | Gardvik | 2015 |
| Mi Rørleggerservice AS | Oslo | 2025 |
| Mi-Co AS | Slemmestad | 2020 |
| Mi-Holding AS | Førde | 2008 |
| Mibo Bolig AS | Stavanger | 2024 |
| Mibra Invest AS | Spydeberg | 2016 |
| Michael Gilbertsson Bygg AB | Se-530 10 Vedum | 2005 |
| Michael Holst Murservice AS | Gressvik | 2018 |
| Michael Tenchio | De-19322 Rühstädt | 2016 |
| Michael Wahlstrøm Bygg Og Vedlikehold AS | Halden | 2016 |
| Michael Wojciech Szaszor | 83-130 Pelpin | 2009 |
| Michaels Brolægning Nuf | Dk-5485 Skamby | 2025 |
| Michal Balak | Matrand | 2020 |
| Michal Bogusz | 13-100 Nidzica | 2007 |
| Michal Flisikowski | Oslo | 2009 |
| Michal Juza | Matrand | 2020 |
| Michal Olitkowski | Grålum | 2007 |
| Michal Rhode Blok | 84-200 Wejherowo | 2007 |
| Michbud Michal Lejkowski | Pl-83-340 Sierakowice | 2015 |
| Michcon Norge AS | Oslo | 2018 |
| Michols Ventialtion AB | 79234 Mora | 2014 |
| Micke Mäkelä Elmek & Service AB | Se-981 38 Kiruna | 2024 |
| Micke's Bygg O Entreprenad | Oslo | 2003 |
| Mickes Rør AS | Oslo | 2019 |
| Mickey Fliser AS | Yven | 2019 |
| Micnatsus AS | Storebø | 2025 |
| Micro Floor AS | Rud | 2023 |
| Microinvest Norge AS | Moss | 2023 |
| Microtrenching Innlandet AS | Bybrua | 2014 |
| Mics AS | Mo I Rana | 2017 |
| Mid Scandinavia Engineers AB (Mideng) | Se-833 34 Strömsund | 2012 |
| Midbøe AS | Stavanger | 1989 |
| Midgard Bygg AS | Hernes | 2021 |
| Midgard Mur Betong AS | Horten | 2023 |
| Midgard Mur Holding AS | Horten | 2022 |
| Midi Bygg AS | Kongsberg | 2025 |
| Midje AS | Aurland | 2021 |
| Midje Maskin AS | Aurland | 2008 |
| Midsund Eiendom AS | Midsund | 2007 |
| Midsund Elektro AS | Midsund | 1990 |
| Midt Elektro AS | Støren | 2006 |
| Midt Inneklima AS | Trondheim | 2025 |
| Midt Norge Entreprenør AS | Trofors | 1995 |
| Midt Norsk Fjell & Anlegg AS | Ler | 2026 |
| Midt Norsk Montering Ans | Verdal | 1993 |
| Midt Norsk Stillas AS | Verdal | 2001 |
| Midt Telemark Elektro AS | Gvarv | 2018 |
| Midt- Norge Kommunikasjon AS | Skogn | 2014 |
| Midt- Norsk Byggservice AS | Sørli | 2008 |
| Midt-Bygg AS | Trondheim | 2015 |
| Midt-Norge Blåseisolering AS | Ranheim | 2021 |
| Midt-Norsk Bor Og Betongsaging AS | Verdal | 1998 |
| Midt-Norsk Bygg Og Eiendom AS | Tustna | 2012 |
| Midt-Norsk Fjellteknikk AS | Overhalla | 2023 |
| Midt-Norsk Industriservice AS | Frosta | 1997 |
| Midt-Norsk Kjøleservice AS | Bjugn | 2009 |
| Midt-Norsk Klimaservice AS | Viggja | 2022 |
| Midt-Norsk Mur AS | Klæbu | 2024 |
| Midt-Norsk Murservice AS | Steinkjer | 2026 |
| Midt-Norsk Områdesikring Da | Inderøy | 2006 |
| Midt-Norsk Solcelle AS | Frosta | 2018 |
| Midt-Norsk VVS AS | Inderøy | 2012 |
| Midt-Telemark Betong AS | Gvarv | 2023 |
| Midt-Telemark Bygg AS | Bø I Telemark | 2003 |
| Midt-Telemark Flis Og Mur AS | Bø I Telemark | 2019 |
| Midt-Telemark Graveservice AS | Bø I Telemark | 2020 |
| Midt-Telemark Holding AS | Nordagutu | 2018 |
| Midt-Telemark Maskinutleie AS | Ulefoss | 2020 |
| Midt-Telemark Pumpeservice AS | Bø I Telemark | 2012 |
| Midt-Telemark Rør AS | Ulefoss | 2019 |
| Midt-Telemark Rør Viken AS | Ulefoss | 2020 |
| Midt-Troms Betongpumping AS | Finnsnes | 2023 |
| Midt-Troms Gravemaskin AS | Finnsnes | 1987 |
| Midtbø Bygg AS | Vråliosen | 2001 |
| Midtbøen Blikkenslagerverkstad AS | Kviteseid | 2011 |
| Midtbøs Betong AS | Voss | 2024 |
| Midtdalen Rørlegger Bedrift AS | Sør-Fron | 2017 |
| Midtec AS | Namsos | 2021 |
| Midteide Consulting AS | Oslo | 2022 |
| Midtfylket Entreprenør AS | Åmot | 2018 |
| Midthordland Elektro AS | Årland | 1990 |
| Midtli Og Svelstad Bygg AS | Sel | 2008 |
| Midtlien Leiekjøring AS | Vestre Gausdal | 2020 |
| Midtnor Maskin AS | Buvika | 2007 |
| Midtnorsk Brannsikring AS | Tennfjord | 2012 |
| Midtnorsk Glass Service AS | Trondheim | 2026 |
| Midtnorsk Sprøytebetong Og Injeksjon AS | Orkanger | 2018 |
| Midtre Holmetangen Vann Og Avløp SA | Vesterøy | 2023 |
| Midtskogen Holding AS | Elverum | 2015 |
| Midtskogen Maskin AS | Elverum | 2015 |