 | MOSS VVS AS | 816173892 | MOSS |
| MOSTER ELEKTRO AS | 990904715 | BØMLO |
| MOSTUE AS | 913184602 | NORDRE FOLLO |
| M. OTTERSHAGEN & SØNN AS | 995709651 | LØTEN |
| MOTUM AS | 818709722 | OSLO |
| MOTUM RULLETRAPPER AS | 921862709 | EIDSVOLL |
| MØVIK BYGGETJENESTER AS | 997898559 | KRISTIANSAND |
| M. PAULEN AS | 915114431 | KARASJOK |
| MPFC AS | 922699550 | NITTEDAL |
| MPF ENTREPRENØR AS | 985613338 | OSLO |
| MP RENOVERING AS | 926275690 | BÆRUM |
| MR ENTREPRENØR AS | 930576182 | HOL |
| MR HÅNDVERK AS | 921565356 | DRAMMEN |
| MR. PUKK AS | 998740908 | OSLO |
| MRS VVS AS | 917983615 | OSLO |
| M.SIVERTSEN BYGG AS | 986998705 | RISØR |
| MT-BYGGTEKNIKK AS | 922943117 | STJØRDAL |
| MT BYGGVERK AS | 997993454 | OSLO |
| MTE AS | 927385546 | SØRREISA |
| MTG AS | 941627943 | TRONDHEIM |
| MTJ AS | 914884764 | MOSKENES |
| MTK BYGG AS | 919076755 | ULLENSVANG |
| MT KLIMA AS | 820739582 | RINGERIKE |
| M. T .V BYGG & EIENDOM AS | 987995351 | ASKØY |
| MULDBAKKEN BYGG AS | 997991877 | SØR-AURDAL |
| MULTIBETONG AS | 915270646 | NARVIK |
| MULTI BYGG AS | 910854798 | RINGSAKER |
| MULTIBYGG AS INGENIØR- OG ENTREPRENØRFORRETNING | 952720600 | NITTEDAL |
| MULTIBYGG NORD AS | 925854999 | ALTA |
| MULTI BYGG PARTNER AS | 918588930 | LIER |
| MULTICO AS | 919563974 | IVELAND |
| MULTICON RØR SERVICE AS | 920618472 | BÆRUM |
| MULTICONSULT NORGE AS | 918836519 | OSLO |
| MULTIFLIS AS | 992299649 | ARENDAL |
| MULTI GRUNNMUR AS | 963996608 | TRONDHEIM |
| MULTI KRAFT AS | 975926451 | LIER |
| MULTILUFT AS | 917786429 | HORTEN |
| MULTI PROSJEKT TEAM AS | 996564320 | BERGEN |
| MULTIREHAB AS | 918714227 | OSLO |
| MULTISTEEL AS | 913777646 | PORSGRUNN |
| MULTI VVS & VARMEPUMPER AS | 831688262 | RINGERIKE |
| MULVIK AS | 932102978 | VOLDA |
| MUR & BETONGSERVICE Arne Sægrov | 984770006 | SANDNES |
| MURCO AS | 926380877 | TRONDHEIM |
| MUREFIRMA PÅL HAUGEN | 953996529 | RINGSAKER |
| MURER AUDUN FREDRIKSEN AS | 996785793 | EIDSVOLL |
| MURER BERGEHAGEN AS | 920641865 | LILLEHAMMER |
| MURERCOMPANIET AS | 912065332 | DRAMMEN |
| MURERFIRMA BREITVE AS | 976301935 | HAUGESUND |
| MURERFIRMA EDVIN AAMODT | 987660937 | KRISTIANSAND |