| Mecalux Spolka Z Organiczona Odpowiedzialnoscia | 44-109 Gliwice | 2012 |
| Mecan AS | Avaldsnes | 2007 |
| Mecan Invest AS | Avaldsnes | 2008 |
| Mecanicas Bolea S.A. | 30353 Cartagena | 2018 |
| Meccon AS | Arendal | 2015 |
| Mechanical Equipment Company (Meco) Ireland Limited | Ie-Co Limerick V94 6K65 | 2020 |
| Mechanical Field Support B. V. | 6666Zj Heteren | 2010 |
| Mechanical Solutions AS | Sandnes | 2022 |
| Mechatherm International Limited | B64 6Pu England | 2023 |
| Mechatronic AS | Farsund | 2020 |
| Mechatronic Group AS | Farsund | 2021 |
| Mechsell AS | Stavanger | 2019 |
| Mechtronic AS | Sandnes | 2009 |
| Mecsupport AS | Rakkestad | 2019 |
| Mectro AS | Horten | 1995 |
| Mecwide Nordics AS | Oslo | 2022 |
| Mecwide Norway | Pt-4755-551 Vila Seca | 2022 |
| Med-Storm Innovation AS | Oslo | 1998 |
| Medcam Nuf | Se-523 90 Ulricehamn | 2021 |
| Medco AS | Moss | 2001 |
| Medelle AS | Oslo | 2017 |
| Medenta AS | Steinsland | 2012 |
| Medhus Møbelsnekkeri AS | Oslo | 2024 |
| Mediahuset AS | Sunndalsøra | 1991 |
| Medice Arzneimittel Pütter GmbH & Co. KG | De-58638 Iserlohn | 2015 |
| Mediehuset Andvord AS | Hagan | 1960 |
| Medik AS | Oslo | 2018 |
| Medikalteknikk AS | Drammen | 2015 |
| Medisinteknikk AS | Vollen | 2024 |
| Medistim ASA | Oslo | 1984 |
| Mediterranean Gastronomi AS | Borgenhaugen | 2026 |
| Medizone AS | Moss | 2023 |
| Medpalett AS | Sandnes | 2004 |
| Medwear AS | Rælingen | 2015 |
| Medø Slipp AS | Tjøme | 2014 |
| Meg Fix AS | Førresfjorden | 2022 |
| Meg Holding AS | Ålen | 2005 |
| Megacon AS | Bønes | 1974 |
| Megalink AS | Vestby | 1991 |
| Megan Seating Grzedzicki | 86-070 Dabrowa Chelminska | 2010 |
| Mehren Kjemi AS | Oslo | 1994 |
| Meiko Maschinenbau GmbH & Co. KG | 77652 Offenburg | 2009 |
| Meirsmak Måge AS | Nå | 2021 |
| Meiser Norway AS | Stokke | 1988 |
| Meisland Trapp AS | Sandnes | 2007 |
| Meium AS | Selbustrand | 1985 |
| Meivcore Norway AS | Skien | 2011 |
| Mek & Maskin I Överkalix AB | Longyearbyen | 2007 |
| Mek & Welding AS | Tistedal | 2012 |
| Mek-Nor AS | Sortland | 2025 |
| Mek-Tek AS | Eydehavn | 2021 |
| Mekan AS | Dalen | 2020 |
| Mekanering AS | Bosberg | 2012 |
| Mekanex Maskin AB Nuf | Se-192 72 Sollentuna | 2007 |
| Mekaniker 1 AS | Kvål | 2023 |
| Mekaniker'N Jonny AS | Moss | 2009 |
| Mekanikk Eiendom AS | Laksevåg | 2009 |
| Mekanikk Og Elektroservice AS | Lørenskog | 2012 |
| Mekanikkservice AS | Stavanger | 2010 |
| Mekanisk Industri AS | Dalekvam | 1976 |
| Mekanisk Service AS | Hamresanden | 2012 |
| Mekanisk Service Halden AS | Halden | 1993 |
| Mekanisk Service Halden-Polska Polsh Limited Liability Company | Pl-83-110 Baldowo | 2022 |
| Mekanisk Service Skien AS | Skien | 2026 |
| Mekano AS | Porsgrunn | 2024 |
| Mekanor AS | Os I Østerdalen | 1992 |
| Mekasense AS | Nyborg | 2020 |
| Mekkeriet AS | Oslo | 2025 |
| Mekktec AS | Bjerkreim | 2012 |
| Mekon Gruppen AS | Rørvik | 2012 |
| Mekon Service AS | Rørvik | 2024 |
| Mektek Vedlikehold AS | Haugesund | 2006 |
| Mekteknik I Smedjebacken AB | Se - 777 90 Smedjebacken | 2015 |
| Mektre AS | Gamle Fredrikstad | 2024 |
| Mektronikk AS | Sandefjord | 2004 |
| Meland Sag & Høvleri AS | Stryn | 2005 |
| Melas Christos Nuf | Gr-45500 Ioannina | 2026 |
| Melbu Systems AS | Melbu | 2009 |
| Melby Maskin & Industriservice AS | Verdal | 2021 |
| Melby Slipeverksted AS | Verdal | 2025 |
| Melby Snekkerverksted AS | Eide | 1985 |
| Melby's Tradisjonsmat AS | Åsvang | 2017 |
| Melcal AS | Sandnes | 2004 |
| Melcal S.P.A | It-91013 Calatafimi Segesta (Tp) | 2026 |
| Meldal Blikkenslagerverksted AS | Meldal | 1987 |
| Meldal Trebåtbyggeri Da | Jerpstad | 1995 |
| Meling AS | Kvitsøy | 2001 |
| Meling Marineservice AS | Austre Åmøy | 2017 |
| Melings AS | Stavanger | 1986 |
| Meliz Da | Ski | 2006 |
| Melketeknikk.No AS | Sandnes | 2018 |
| Melkvika Heimgard AS | Gjersvikgrenda | 2026 |
| Mellerud AS | Røyse | 1999 |
| Mellerud Eiendomsutvikling AS | Hønefoss | 2005 |
| Mellingsæter AS | Melhus | 2004 |
| Mellom Konsept AS | Ålesund | 2026 |
| Mellum AS | Aurskog | 2006 |
| Meltaway AS | Kristiansand S | 2024 |
| Melåsberget Sag Ans | Jømna | 1996 |
| Meløy Notbøteri AS | Halsa | 2001 |