 | LUTRO BYGG & EIENDOM AS | 986218122 | OSLO |
| LV MASKIN AS | 998212235 | HEIM |
| LY ARKITEKTER AS | 984050259 | KRISTIANSAND |
| LYKKEN BYGGCONSULT AS | 998862272 | NORD-AURDAL |
| LY MINIHUS AS | 931962612 | TROMSØ |
| LYN ELEKTRO AS | 992824115 | SARPSBORG |
| LYNGDAL EL-INSTALASJON AS | 958553625 | LYNGDAL |
| LYNGDAL FYRINGSSENTRAL AS | 966307358 | LYNGDAL |
| LYNGDAL RØR AS | 916542828 | LYNGDAL |
| LYNGHAUG FJELLSPRENGNING AS | 923003673 | SØRREISA |
| LYNG & LØBERG AS | 914057507 | SKIEN |
| LYNGLUND MASKIN AS | 928285103 | ØYGARDEN |
| LYNGSTAD ARKITEKTER AS | 981238001 | STEINKJER |
| LYNGSTAD BYGG AS | 924359412 | SANDNES |
| LYSAKER BYGGPROSJEKT AS | 929465148 | ØVRE EIKER |
| LYSAKER ELEKTRISKE AS | 920060188 | OSLO |
| LYSAKER & THORRUD AS | 916119712 | DRAMMEN |
| LYSEBO VVS AS | 987255749 | LARVIK |
| LYSELL ENTREPRENØR AS | 998412986 | TØNSBERG |
| LYSEN RØRLEGGERSERVICE AS | 922031088 | BERGEN |
| LYSMESTER`N AS | 986047042 | OSLO |
| LYS OG VARME AS | 977356067 | OSLO |
| LYSSAND BYGG & BETONG AS | 914634385 | BJØRNAFJORDEN |
| LYSSAND MASKIN | 998887585 | BJØRNAFJORDEN |
| LYSTEKNIKK ELEKTROENTREPRENØR AS | 995971135 | OSLO |
| LYST ELEKTRO AS | 916491840 | OSLO |
| M2 BYGG & DESIGN AS | 925732915 | NORDRE FOLLO |
| M2 TOMTEUTVIKLING AS | 911640260 | STAVANGER |
| M3 BETONG AS | 929112091 | KVAM |
| M4 ENTREPRENØR AS | 926500449 | BÆRUM |
| MA BYGG & VVS AS | 929094018 | OSLO |
| MAC ENTREPRENØR AS | 925781576 | MOSS |
| MAD FREDRIKSTAD AS | 928286991 | FREDRIKSTAD |
| MAD OSLO AS | 916087578 | OSLO |
| MADSEN ELEKTRO AS | 997391063 | INDERØY |
| MAD VEST AS | 912320898 | BERGEN |
| 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 |