| Malespesialisten Og Renhold AS | Oslo | 2017 |
| Maleteknikk AS | Eggkleiva | 2012 |
| Malex AS | Drammen | 2022 |
| Malgips AS | Oslo | 2021 |
| Malia Proff AS | Kristiansund N | 2021 |
| Maling & Boligstyling AS | Moss | 2014 |
| Maling & Mer Da | Vollen | 2024 |
| Maling & Renovering AS | Silsand | 2019 |
| Maling AS | Borgenhaugen | 2021 |
| Maling Og Bygg Kompaniet AS | Oslo | 2025 |
| Maling Og Bygganlegg Lindstrøm | Nittedal | 2000 |
| Maling Og Flis AS | Tromsø | 2016 |
| Maling Og Mer AS | Kristiansand S | 2024 |
| Maling Og Montasje Da | Raufoss | 2010 |
| Maling Og Snekkerservice AS | Alvdal | 2026 |
| Maling Og Tilsynsservice AS | Lillesand | 2017 |
| Maling Og Vedlikehold Da | Mjøndalen | 2008 |
| Maling Tapet Gulvbelegg AS | Slattum | 2012 |
| Malland AS | Heimdal | 2019 |
| Malli Holding AS | Ålgård | 2016 |
| Malm Byggepartner AS | Gjesåsen | 2026 |
| Malm Utleie Og Service AS | Malm | 2015 |
| Malmbyggingar SLF | Is-121 Reykjavik | 2016 |
| Malmedal Og Langås Bygg AS | Elnesvågen | 2023 |
| Malmin Entreprenør AS | Sandnes | 2014 |
| Malmo Og Ugelstad Eiendomsservice AS | Brumunddal | 2006 |
| Malmpol Spolka Z.O.O. | 15-345 Bialystok | 2014 |
| Malmsten Entreprenad AB Nuf | Se-29635 Åhus | 2021 |
| Malodal AS | Trondheim | 2006 |
| Malom AS | Skodje | 2019 |
| Malot Invest AS | Larvik | 2005 |
| Malproff-Service AS | Oslo | 2016 |
| Maltech AS | Lyngdal | 2006 |
| Malthan Holding AS | Trøgstad | 2024 |
| Malum Bygg AS | Singsås | 2001 |
| Malum Byggservice AS | Skogn | 2010 |
| Malvik Byggservice AS | Hommelvik | 2013 |
| Malvik Varmepumper AS | Hommelvik | 2019 |
| Malvikbygg AS | Vikhammer | 2016 |
| Malviken Malermester AS | Lillestrøm | 2021 |
| Malvin's AS | Tolvsrød | 2026 |
| Malwina I Adam | Sandefjord | 2008 |
| Mama Bygg 1 AS | Lier | 2013 |
| Mama Bygg AS | Lier | 2015 |
| Mama Dom Invest AS | Lier | 2019 |
| Mama Invest AS | Varhaug | 2016 |
| Mamen Mølle Norge | Høvik | 2008 |
| Mammoet Deutschland GmbH | Drammen | 2020 |
| Mana Project AS | Jar | 2021 |
| Mana Vertikal AS | Høvik | 2016 |
| Mana VVS AS | Lillestrøm | 2023 |
| Management Technology Sverige Nuf | Se-703 44 Örebro | 2023 |
| Managua AS | Laksevåg | 2005 |
| Manak Bygg AS | Asker | 2008 |
| Manak Holding AS | Hvalstad | 2006 |
| Manatwork AS | Kalandseidet | 2012 |
| Mandal Bygg AS | Mandal | 2016 |
| Mandal Bygg Holding AS | Mandal | 2020 |
| Mandal Byggservice AS | Mandal | 2008 |
| Mandal Eiendom AS | Mandal | 2007 |
| Mandal Elektro AS | Mandal | 1976 |
| Mandal Graveservice AS | Søgne | 2017 |
| Mandal Kjøleservice AS | Mandal | 2007 |
| Mandal Maling AS | Mandal | 2019 |
| Mandal Mur & Flis AS | Mandal | 2013 |
| Mandal Rørleggerservice AS | Mandal | 2012 |
| Mandal Stillas AS | Mandal | 2020 |
| Mandelid Bygg & Vedlikehald AS | Førde | 2020 |
| Mandelid Holding AS | Førde | 2017 |
| Mandelli S.R.L. | It-29122 Piacenza | 2022 |
| Mandt Bygg AS | Mysen | 2019 |
| Manfred Springer | 98593 Seligenthal | 2007 |
| Mangelrød Bygg AS | Kvelde | 2024 |
| Mangen Snø & Byggservice AS | Enebakk | 2025 |
| Manglerud Rørleggerbedrift AS | Oslo | 2006 |
| Mani Bergen AS | Laksevåg | 2023 |
| Maniecki - Uslugi Budowlane | Pl- 07-230 Zabrodzie | 2008 |
| Mankowsky Malerservice AS | Trondheim | 2022 |
| Mankraft AS | Løken | 2025 |
| Mann I Vann AS | Valestrandsfossen | 2025 |
| Manna Rørservice AS | Hønefoss | 2023 |
| Mannblikk Buskerud AS | Vestfossen | 2017 |
| Manndalen Maskin AS | Samuelsberg | 2012 |
| Manndalen Tak AS | Samuelsberg | 2019 |
| Manndalen Tak Og Blikk AS | Samuelsberg | 2024 |
| Mannebrekke Rør AS | Førde | 2017 |
| Mannhart AS | Tjodalyng | 2017 |
| Mannskapsutleie AS | Notodden | 2015 |
| Mannsverk AS | Tverrelvdalen | 2013 |
| Mannsverk Bygg AS | Tverrelvdalen | 2014 |
| Manov Designa AS | Oslo | 2013 |
| Mansar Malerservice AS | Lyngdal | 2017 |
| Mantas Bygg AS | Nesttun | 2020 |
| Mantzarakis Dimitrios Georgios Nuf | 74133 | 2025 |
| Manudesign AS | Tinn Austbygd | 2026 |
| Manuelt Håndverk AS | Larvik | 2018 |
| Mapei Marine S.R.L. | It-20159 Milan | 2021 |
| Mapis Trearbeid AS | Ågotnes | 2016 |
| Mapre AS | Gjerdrum | 2020 |
| Maquiaridos S.L. | Es-Oropesa 45560 | 2025 |