 | MJØSEN MURMESTERFORRETNING AS | 983528597 | HAMAR |
| MJØSENTREPRENØREN AS | 926716735 | EIDSVOLL |
| M&K BYGG AS | 918900500 | DRAMMEN |
| MK BYGG AS | 991375236 | ÅLESUND |
| M K MYKLEBUST ENTREPRENØR AS | 979958234 | FJALER |
| MK TØMRER OG RØRSERVICE AS | 930104817 | OSLO |
| M L HAUGE Innehaver Jan Ludvig Hauge | 971042818 | NESODDEN |
| M&M BYGG AS | 917883114 | FREDRIKSTAD |
| MMC FIRST PROCESS AS | 979329903 | HERØY (MØRE OG ROMSDAL) |
| MMM BYGG AS | 911646951 | INDRE ØSTFOLD |
| MM METALL AS | 997799550 | TRONDHEIM |
| MM TOTALBYGG AS | 913304098 | BÆRUM |
| MM TOTALBYGG OG BYGGSERVICE AS | 917430209 | BÆRUM |
| MN RØR & BYGG AS | 933968170 | DRAMMEN |
| MN RØRLEGGERBEDRIFT AS | 927270188 | DRAMMEN |
| MO1 MASKIN AS | 927712202 | ÅL |
| M.Ø ANLEGG OG BETONG 2 AS | 931053396 | LINDESNES |
| MOBILGRUS AS | 996727300 | TYNSET |
| MOBY ENTREPRENØR AS | 991145834 | FREDRIKSTAD |
| MO BYGGSERVICE AS | 928451526 | ASKER |
| MODAHL ELEKTRISKE AS | 923660194 | NORDRE FOLLO |
| MODALSLI RØR AS | 923699562 | FLEKKEFJORD |
| MODALSLI RØR LISTER AS | 928459713 | LYNGDAL |
| MODERNE BAD OG FLIS AS | 912110400 | NORDRE FOLLO |
| MODERNE BYGGFORNYELSE AS | 979446071 | OSLO |
| MODERNE UTEROM AS | 912682439 | OSLO |
| MODERNE VVS AS | 967478091 | OSLO |
| MODULPLUSS SØR AS | 927065029 | EVJE OG HORNNES |
| MODULSERVICE AS | 998210585 | SKIEN |
| MODULSYSTEM AS | 914964024 | OSLO |
| MODULVEGGER BERGEN AS | 897997312 | BERGEN |
| MODULVEGGER STAVANGER AS | 938527024 | SANDNES |
| MODUS ARKITEKTER AS | 998653576 | OSLO |
| MODUS MUR AS | 919332026 | KRISTIANSAND |
| MOE ENTREPRENØR AS | 991482806 | FJORD |
| MOELVEN BYGGMODUL AS | 941809219 | RINGSAKER |
| MOELVEN LIMTRE AS | 913711300 | RINGSAKER |
| MOELVEN MODUS AS | 951269778 | ULLENSAKER |
| MOELV RØRSERVICE AS | 983196551 | RINGSAKER |
| MOE MASKIN OG TRANSPORT AS | 824353182 | SMØLA |
| MOEN BYGGTJENESTER AS | 995383756 | SOLA |
| MOENS BYGGSERVICE AS | 928027902 | VESTNES |
| MOFOSSBAKKE BYGG SERVICE | 995263076 | DRANGEDAL |
| MOI ARKITEKTER AS | 917126917 | ASKER |
| MOI BYGG AS | 983270492 | KVINESDAL |
| MOI RØR AS | 971004525 | KRISTIANSAND |
| MOLAND TOTAL AS | 911908921 | SENJA |
| MOLDEN ARKITEKTER AS | 954990508 | BERGEN |
| MOLDE VVS AS | 990507139 | MOLDE |
| MOLDJORD BYGG OG ANLEGG AS | 986899545 | BEIARN |