| Mona Lise Holding AS | Stokke | 2005 |
| Mondelez Europe Procurement GmbH Nuf | Oslo | 2008 |
| Mondelez Europe Services GmbH Nuf | Oslo | 2008 |
| Moneygram International SA Nuf | Sandnes | 2019 |
| Mongstad Utleie AS | Mongstad | 2001 |
| Mongstad Utleieservice AS | Austrheim | 2013 |
| Monia Ressurs AS | Oslo | 2024 |
| Monikas Vaskebyrå AS | Sandnes | 2017 |
| Monismanien AS | Oslo | 2025 |
| Monkeytours AS | Kristiansand S | 2025 |
| Monn Aktiv AS | Hønefoss | 2013 |
| Monsoon Maritime Services (Phils) Inc | 20171 Roxas Blvd. Malate Manila | 2012 |
| Monssen Invest AS | Søreidgrend | 2006 |
| Monstad Maskin AS | Åfjord | 2015 |
| Monsterfangst AS | Vikersund | 2025 |
| Montagen AG | Ch-9477 Trussach | 2010 |
| Montasjelaget AS | Sandnes | 2011 |
| Montek Drift AS | Andenes | 2025 |
| Montenor Gruppen AS | Gressvik | 2021 |
| Monterbyrån Sverige AB | Se-141 60 Huddinge | 2023 |
| Montgomery Engineering Ltd | Stornoway Hs1 2Dz Scotland | 2019 |
| MONTØR1 AS | Koppang | 2005 |
| Monument Music AS | Oslo | 2019 |
| Monvera AS | Grøa | 2026 |
| Moo Retreats AS | Oslo | 2026 |
| Moodys Analytics Sweden | Se-114 46 Stockholm | 2022 |
| Moonduster AS | Trondheim | 2006 |
| Moonlight Sound AS | Fredrikstad | 2015 |
| Moonvalley Adventure AS | Måndalen | 2020 |
| Moore Partners AS | Tiller | 2008 |
| Mooring Management AS | Straume | 2021 |
| Moply Holding AS | Drammen | 2025 |
| Mopp AS | Oslo | 2023 |
| Moppen Renhold Da | Oslo | 1989 |
| Mopster AS | Gran | 2026 |
| Moray Energy AS | Stavanger | 2022 |
| Moray Energy Holding AS | Stavanger | 2023 |
| Moray Offshore AS | Stavanger | 2018 |
| Moray Rent AS | Stavanger | 2023 |
| Morgan Peformance Improvement Ltd | Lanarkshire Ml11 9Db | 2018 |
| Morgedal Aktiv AS | Morgedal | 2025 |
| Morgedal Drift Og Vedlikehald AS | Notodden | 2004 |
| Morildnatt AS | Kolbjørnsvik | 2023 |
| Morin Enertech Inc | La Baie, Qc, G7B 2Z6 | 2017 |
| Moriss Celtniecïba Nuf | Halden | 2010 |
| Mork Utleie AS | Hjørungavåg | 2011 |
| Morkgruppen AS | Drammen | 2016 |
| Morninglight Operations Norge AS | Vear | 2013 |
| Morplast SP. Z.O.O. | Lindesnes | 2010 |
| Morris AS | Sem | 1994 |
| Morroevent Ans | Trondheim | 2002 |
| Morstu Utleie Og Drift AS | Austvatn | 2026 |
| Morten AS | Lier | 2005 |
| Morten Fjelldalen AS | Skien | 2021 |
| Morten Haave AS | Stjørdal | 2013 |
| Morten Hagen Graveservice AS | Minnesund | 2017 |
| Morten Hønneland AS | Mandal | 2013 |
| Morten Klepp Holding AS | Sola | 2005 |
| Morten Smidesang AS | Minnesund | 2005 |
| Mortenhals AS | Mortenhals | 2024 |
| Mortensens Crew AS | Jarfjord | 2017 |
| Mortmannsgård Recruitment AS | Nesttun | 2018 |
| Morud Allhjelp AS | Meistervik | 2017 |
| Morvik Eiendomservice AS | Hordvik | 2015 |
| Mosaique Headhunting AS | Sandnes | 2015 |
| Mosaique Holding AS | Sandnes | 2013 |
| Mosaker Rekruttering AS | Bergen | 2016 |
| Moseid Maskin AS | Mosby | 2025 |
| Mosjøen Anlegg & Utleie AS | Mosjøen | 2012 |
| Moskusguiden AS | Dovre | 2021 |
| Moss Eldrehjelp & Eiendomsservice AS | Gressvik | 2020 |
| Moss Hus & Hage AS | Moss | 2003 |
| Moss Kirkegårdstjeneste Da | Moss | 2005 |
| Moss Snøryddingskompani AS | Moss | 2019 |
| Moss Vaktmesterservice AS | Dilling | 2023 |
| Mosterøy Servicebåt AS | Mosterøy | 2026 |
| Mostraum Holding AS | Hjelmås | 2017 |
| Mostraum Management AS | Hjelmås | 2018 |
| Mostrem AS | Kristiansand S | 2023 |
| Mosvik Holding AS | Kolnes | 2019 |
| Motel Agency AS | Oslo | 2018 |
| Motion Drive AS | Oslo | 2026 |
| Motive AS | Stavanger | 1992 |
| Motive Certification & Inspection Ltd | Gb-Aberdeenshire Ab54 7Yb | 2017 |
| Moto Sør AS | Kristiansand S | 1994 |
| Motoboy Solution AS | Nærbø | 2016 |
| Motorevents Norge AS | Stavanger | 2021 |
| Motorfest AS | Os | 2021 |
| Motorhome & Camper Rental AS | Kløfta | 2018 |
| Motorhome AS | Melhus | 2003 |
| Motorpark Indre Østfold AS | Trøgstad | 2014 |
| Motorsport Event AS | Hafslundsøy | 2013 |
| Motrum Bilutleie AS | Stavanger | 2017 |
| Mountain Adventures AS | Sogndal | 2025 |
| Mountain Ox AS | Paradis | 2020 |
| Mountainlife | Se-856 42 Sundsvall | 2014 |
| Mountains and Fjords Guiding AS | Godvik | 2024 |
| Mountains of Norway SA | Vang I Valdres | 2017 |
| Mountainsport AS | Måndalen | 2017 |
| Mov Solutions AS | Ålesund | 2023 |