 | MESTERRØR AS | 931395246 | LEVANGER |
| MESTER-RØR VVS AS | 996778894 | OSLO |
| MESTER-SERVICE AS BYGG- & TØMMERMESTER TERJE WILHELMSEN | 877207862 | LILLESTRØM |
| MESTERTAK AS | 928489701 | SANDEFJORD |
| MESTERTAKET AS | 922994145 | SANDEFJORD |
| MESTERTAKST AS | 889273542 | STAVANGER |
| MESTERTAK TRONDHEIM AS | 989179241 | TRONDHEIM |
| MESTERTØMRERBYGG AS | 924676337 | TRONDHEIM |
| MESTER VANN OG VARME AS | 920702767 | BÆRUM |
| MESTER WESTER & CO AS | 914038413 | ASKER |
| META LANDSKAP AS | 926433296 | OSLO |
| METALL BYGG AS | 994864947 | KRISTIANSAND |
| METALL BYGG NORD AS | 917804672 | STEINKJER |
| METAMORF ARKITEKTUR AS | 915644740 | STAVANGER |
| METAWELD AS | 988605476 | NORDRE FOLLO |
| METER2 AS | 919097884 | NES |
| METER - ARKITEKTUR AS | 983152317 | FREDRIKSTAD |
| METERSTOKKEN Svein Tøsse | 988817953 | VAKSDAL |
| METKON AS | 831278242 | OSLO |
| METO PRO AS | 990550018 | LÆRDAL |
| METROSTAV NORGE AS | 924549092 | BÆRUM |
| METSÄ DESIGN OG ARKITEKTUR AS | 927946874 | ÅSNES |
| MEYER-EIENDOM AS | 965476296 | OSLO |
| MG ELEKTRO AS | 987027568 | EIGERSUND |
| MG GRAVESERVICE AS | 991097317 | ENEBAKK |
| M. GJERSTAD BETONG AS | 925228338 | BERGEN |
| MG LINK AS | 930378755 | STAVANGER |
| MGM FLIS & MUR AS | 934469402 | ASKØY |
| M GRØNVOLD AS | 977172497 | RINGSAKER |
| MG RØRLEGGERTJENESTER AS | 930784710 | OSLO |
| MH ANLEGG AS | 925741108 | KONGSBERG |
| M HAUG & SØNN AS | 987651571 | GRAN |
| M. HERNES | 930004952 | NES |
| MH MASKINUTLEIE AS | 918359230 | SANDNES |
| MH SNEKKERSERVICE AS | 918911308 | HITRA |
| MI BYGG & MESTERBEDRIFT AS | 915354408 | NORD-ODAL |
| MIDBØE AS | 951838756 | STAVANGER |
| MIDGARD ARKITEKTUR JITKA HOLANOVÁ | 933682927 | HORTEN |
| MIDGARD BYGG AS | 927167697 | ELVERUM |
| MIDJE MASKIN AS | 992437065 | AURLAND |
| MIDT-BYGG AS | 915775535 | TRONDHEIM |
| MIDTDALEN RØRLEGGER BEDRIFT AS | 919254750 | SØR-FRON |
| MIDT ELEKTRO AS | 990727465 | MIDTRE GAULDAL |
| MIDTFYLKET ENTREPRENØR AS | 921529740 | MODUM |
| MIDTLI OG SVELSTAD BYGG AS | 992154675 | SEL |
| MIDT NORGE ENTREPRENØR AS | 974391090 | GRANE |
| MIDT-NORSK BYGG OG EIENDOM AS | 998333776 | AURE |
| MIDT-NORSK MUR AS | 932992426 | TRONDHEIM |
| MIDT-NORSK VVS AS | 898290182 | INDERØY |
| MIDTSTØL TRANSPORT AS | 914290864 | ARENDAL |