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| MÆLAND RØR AS | 887574952 | HÅ |
| MÆLEN BLIKK OG VENTILASJON AS | 919653191 | TRONDHEIM |
| MÆLEN MASKIN AS | 919924012 | ORKLAND |
| MAEM BYGGSERVICE AS | 923167064 | ORKLAND |
| MA ENTREPRENØR AS | 990250448 | OSLO |
| MAGNA PROSJEKT SØR AS | 823569262 | LINDESNES |
| MAGNAR BJØRNEVIK | 883520262 | BJØRNAFJORDEN |
| MAGNAR INSTANES AS | 989995502 | ULLENSVANG |
| MAGNAR LUND MASKIN AS | 989986384 | FLEKKEFJORD |
| MAGNAR SKJÆVELAND MURMESTER | 970112243 | SANDNES |
| MAGNAR STOKKE AS | 914415888 | MELHUS |
| MAGNE DAG BRAGELIEN | 970956808 | SEL |
| MAGNE HAFSTAD AS | 974536935 | SUNNFJORD |
| MAGNE HELLAND AS | 990970203 | BJERKREIM |
| MAGNE HOPE AS ENTREPRENØRFORRETNING | 918366016 | ALVER |
| MAGNE MAGLER WIGGEN SIVILARKITEKTER MNAL AS | 979423705 | OSLO |
| MAGNE NORHEIM ENTREPRENØRFORRETNING | 885225802 | BERGEN |
| MAGNE OG JAN BERGET ANLEGGSDRIFT AS | 933846539 | ØVRE EIKER |
| MAGNE OPLAND AS | 976755421 | VEFSN |
| MAGNE SVEEN AS | 860318822 | VESTRE TOTEN |
| MAGNETUN MASKIN AS | 815185382 | GOL |
| MAGNUS EICHINGER VASSBOTN | 985305757 | VOLDA |
| MAGNUS M THUNESTVEDT AS | 937610440 | OSTERØY |
| MAGNUS TRANDEM AS | 925815349 | INDRE ØSTFOLD |
| MAJO BYGG AS | 831097272 | ALVER |
| MAKE ARKITEKTER AS | 813016702 | OSLO |
| MAKE MAKE AS | 927761807 | OSLO |
| MALAK RØRSERVICE AS | 913916034 | OSLO |
| MALARCHITECTURE AS | 998597919 | OSLO |
| MALERCOMPAGNIET OSLO AS | 960992482 | OSLO |
| MALERFIRMA MONSEN AS | 995474115 | BERGEN |
| MALERHUSET AS | 988118656 | OSLO |
| MALERMESTER BUER AS | 819391122 | LILLESTRØM |
| MALERMESTER GREGERSEN AS | 998142482 | LUNNER |
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| MALERMESTER STUDSRUD AS | 880387642 | MARKER |
| MALERMESTER STURE BRÆKSTAD AS | 976523822 | TRONDHEIM |
| MALERMESTRENE JUUHL & BRATFOSS AS | 997327888 | OSLO |
| MALERSENTRALEN AS | 990062773 | HARSTAD |
| MALERSTUEN BYGG AS | 927456117 | NORDRE FOLLO |
| MALERSVENN ANTONIO DIAS AS | 992006528 | OSLO |
| MALING OG FLIS AS | 917514690 | TROMSØ |
| MALMIN ENTREPRENØR AS | 914561345 | SANDNES |
| MALMO OG UGELSTAD EIENDOMSSERVICE AS | 989361112 | RINGSAKER |
| MALOLO EIENDOM AS | 818505752 | TRONDHEIM |
| MÅLØY BYGG AS | 923117644 | KINN |
| MÅLØY BYGGSERVICE AS | 992230487 | KINN |