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| MALERCOMPAGNIET OSLO AS | 960992482 | OSLO |
| MALERFIRMA MONSEN AS | 995474115 | BERGEN |
| MALERHUSET AS | 988118656 | OSLO |
| MALERMESTER BUER AS | 819391122 | LILLESTRØM |
| MALERMESTER JENS PETTER LUNDE AS | 939640533 | OSLO |
| MALERMESTER MEUSBURGER AS | 924447788 | ULLENSVANG |
| MALERMESTER STUDSRUD AS | 880387642 | MARKER |
| MALERMESTER STURE BRÆKSTAD AS | 976523822 | TRONDHEIM |
| MALERMESTRENE JUUHL & BRATFOSS AS | 997327888 | OSLO |
| MALER'N KARLSEN AS | 992334754 | GAUSDAL |
| MALERSVENN ANTONIO DIAS AS | 933484165 | OSLO |
| MALMIN ENTREPRENØR AS | 914561345 | SANDNES |
| MALMO OG UGELSTAD EIENDOMSSERVICE AS | 989361112 | RINGSAKER |
| MALOLO EIENDOM AS | 818505752 | TRONDHEIM |
| MÅLØY BYGGSERVICE AS | 992230487 | KINN |
| MÅLØY EIENDOMSUTVIKLING AS | 929338650 | KINN |
| MÅLØY RØR AS | 987904747 | KINN |
| MÅLSELV BYGG AS | 989965832 | MÅLSELV |
| MÅLSELV MASKIN & TRANSPORT AS | 818313942 | MÅLSELV |
| MAMA BYGG AS | 915743358 | LIER |
| MANDAL BYGG AS | 917131392 | LINDESNES |
| MANDAL KJØLESERVICE AS | 991622497 | LINDESNES |
| MANDAL RØRLEGGERSERVICE AS | 998028078 | LINDESNES |
| MANDT BYGG AS | 922140820 | INDRE ØSTFOLD |
| MANGE BEKKER ARKITEKTUR AS | 824958742 | LILLEHAMMER |
| MANGLERUD RØRLEGGERBEDRIFT AS | 990400970 | OSLO |
| MANNDALEN MASKIN AS | 897935082 | KÅFJORD |
| MANNHART AS | 919042214 | LARVIK |
| MANTAS BYGG AS | 925063231 | BERGEN |
| MANTHEY KULA AS | 913076990 | OSLO |
| MAP ARKITEKTER AS | 992792426 | OSLO |
| MARBERG BYGG- OG TEGNESERVICE | 912054888 | SARPSBORG |
| MARBRE AS | 989822160 | NES |
| MARBRE EIENDOM AS | 985711089 | NES |
| MARCIN PRZEDLACKI | 812221892 | OPPDAL |
| MARCUS - HANDVERKER AS | 924971118 | BÆRUM |
| MARDAL RØR AS | 981406192 | GLOPPEN |
| MARI IGESUND SIVILARKITEKT AS | 922737509 | OSLO |
| MARINA HARBOUR SOLUTIONS AS | 934825365 | ØRSTA |
| MARINE ALUMINIUM AS | 988419486 | KARMØY |
| MARINE METALL AS | 924374462 | FRØYA |
| MARINI CONSULTING AS | 932087537 | LILLESTRØM |
| MARITIM SVEISESERVICE AS | 917318964 | TROMSØ |
| MARIUS EGELAND ARKITEKTER AS | 937719701 | LILLESAND |
| MARIUS WAALE AS | 927068362 | LARVIK |
| MARK ARKITEKTER AS | 912613240 | STAVANGER |
| MARKER ANLEGG AS | 894968672 | MARKER |
| MARKUSSEN MASKIN AS | 927426994 | VESTVÅGØY |
| MARKVEIEN EIENDOM AS | 933918122 | OSLO |
| MARLOW ARKITEKTER AS | 993312681 | BÆRUM |
| MARMINA AS | 929208900 | LØRENSKOG |
| MARSELL BYGG AS | 931795414 | HVALER |
| MÅRSTIG BYGG AS | 917962367 | BERGEN |
| MARTA EGGERTSEN BÆREKRAFT, BYPLAN OG ARKITEKTUR AS | 923578668 | ARENDAL |
| MARTEAM. AS | 912219593 | FROGN |
| MARTENS TAKST AS | 915765416 | OSLO |
| MARTHINSEN & DUVHOLT AS | 980416976 | SANDEFJORD |
| MARTIN JARNÆS NILSEN AS | 979497660 | NITTEDAL |
| MARTIN LID TRELAST AS | 957393926 | VOSS |
| MARTIN M BAKKEN AS | 910401017 | ELVERUM |
| MARTIN PRESTEGÅRD AS | 990341354 | BERGEN |
| MARTIN RØNNING AS | 985868506 | ASKER |
| MARTINSEN BAD & BOLIG AS | 918327967 | OSLO |
| MARTINSEN BETONG AS | 898197832 | MELHUS |
| MARTINSEN BYGG | 928698181 | DRAMMEN |
| MARTINSEN BYGG (GM) AS | 930790923 | ASKER |
| MARTINSEN OG SØNN | 922430969 | FREDRIKSTAD |
| MARTINSEN & STENSTAD BOLIGENTREPRENØR AS | 991408754 | BÆRUM |
| MASIV BYGG AS | 943612226 | KLEPP |
| MASKIN & EIENDOM AS | 912174115 | TROMSØ |
| MASKIN ENTREPRENØREN AS | 833378732 | ASKØY |
| MASKINENTREPRENØR ESPEN JOHANSEN AS | 935173051 | SENJA |
| MASKINENTREPRENØR FUNDAMENTERING OG GRAVING AS | 936948340 | TROMSØ |
| MASKINENTREPRENØR HÅKON ROGSTAD AS | 998397189 | RINGSAKER |
| MASKINENTREPRENØR HERBJØRN NILSSEN AS | 979710968 | TROMSØ |
| MASKINENTREPRENØR JIMMY NORE & SØNN AS | 984231512 | KINN |
| MASKINENTREPRENØR JOSTEIN SUNDE AS | 932251442 | SUNNFJORD |
| MASKINENTREPRENØR KARSTEN MIKALSEN AS | 997091558 | FREDRIKSTAD |
| MASKINENTREPRENØR KNUT ROLANDSEN AS | 984283814 | RØST |
| MASKINENTREPRENØR KRISTIAN KRISTIANSEN AS | 982585058 | NARVIK |
| Maskinentreprenør Lobben & Skinstad A/S | 945856335 | ØVRE EIKER |
| MASKINENTREPRENØR MAGNUS KNUDSEN AS | 930078425 | KRAGERØ |
| MASKINENTREPRENØR MONAN AS | 922960690 | KRISTIANSAND |
| MASKIN ENTREPRENØR ROGER NÆRUM AS | 889568232 | SKIEN |
| MASKINENTREPRENØR RUNE HORVE | 992498218 | KRISTIANSAND |
| MASKINENTREPRENØR S. HAMMERSETH | 969410737 | KINN |
| MASKINENTREPRENØR SØLVE BOGEN AS | 935848296 | ØVRE EIKER |
| MASKINENTREPRENØR STIAN A. OLSEN AS | 918488588 | NANNESTAD |
| MASKINENTREPRENØR TOR GABRIELSEN AS | 982389836 | TROMSØ |
| MASKINENTREPRENØR TRYGVE AASEN AS | 929052137 | SUNNFJORD |
| MASKINFIRMA ÅGE SIMONSEN & SØNN AS | 986550224 | ARENDAL |
| MASKINKONTAKT AS | 837880122 | BERGEN |
| MASKINKRAFT AS | 977485576 | RINGSAKER |
| MASKIN OG UTEMILJØ AS | 987902817 | INDRE ØSTFOLD |
| MASKINSERVICE Arne Jørgen Bøhnsdalen | 980649121 | KONGSVINGER |
| MASKINSTYRING AS | 919720441 | RINGSAKER |
| MASKINTJENESTER AS | 996787028 | SKIEN |
| MASKIN-TRANSPORT AS | 933303950 | ÅMOT |
| MASONITE BEAMS AS | 925357065 | RANA |