 | ABEL ARKITEKTER AS | 934840755 | NESODDEN |
| ABELSEN TØMRERSERVICE AS | 914765730 | INDRE FOSEN |
| AB HAGE & GRAVESERVICE AS | 994527932 | BÆRUM |
| ABICON ELEKTRO AS | 976052560 | DRAMMEN |
| ABILDSØ ELEKTRISKE AS | 937794878 | OSLO |
| ABK RØRSERVICE AS | 990711224 | TØNSBERG |
| ABL BYGG AS | 997934490 | ÅLESUND |
| ABMAS ELEKTRO AS | 935246989 | LØRENSKOG |
| Å-BØGG AS | 919383151 | ORKLAND |
| ABO PLAN & ARKITEKTUR AS | 879951542 | BJØRNAFJORDEN |
| ABORA PROSJEKT AS | 982753589 | BERGEN |
| ABOT AS | 915331262 | TØNSBERG |
| ABP ELEKTRO AS | 998583470 | ARENDAL |
| ABRAHAMSEN TORE | 970046666 | KRAGERØ |
| ABRAHAMSSON & HAUGSTVEDT AS | 983543847 | DRAMMEN |
| A. BRATVOLD | 923061754 | HAMAR |
| ABREXIA PROSJEKTLEDELSE AS | 936715141 | SYKKYLVEN |
| A.B. RØR AS | 932257955 | HÅ |
| ABRS RØR SÆTRE AS | 899327632 | ASKER |
| ABS ENTREPRENØR AS | 926343378 | RINGEBU |
| ABS INSTALLASJON AS | 998228433 | LARVIK |
| ABSOLUTT ANLEGG AS | 930769606 | KÅFJORD |
| ABSOLUTT ARKITEKTUR AS | 997912454 | OSLO |
| ABS-TEKNIKK AS | 813184672 | TRONDHEIM |
| ABSURD ARKITEKTUR AS | 926358316 | STAVANGER |
| ABT BYGG AS | 993298166 | FÆRDER |
| ABV GRUPPEN AS | 933499014 | OSLO |
| A.C BYGG AS | 932163756 | SARPSBORG |
| ACEL AS | 988233315 | ÅLESUND |
| ACO ANLEGG AS | 996342778 | HARAM |
| ACT! AS | 926934481 | OSLO |
| ACTIVE ELEKTRO AS | 913552113 | SANDNES |
| ADAPT BYGGPARTNER AS | 932877422 | VESTBY |
| ADAPTEO AS | 920954278 | DRAMMEN |
| AD ARKITEKTER AS | 894404302 | LIER |
| ADD ARKITEKTER AS | 979497997 | OSLO |
| ADITUS AS | 923383433 | DRAMMEN |
| ADMOS BYGG AS | 925297372 | SOGNDAL |
| ÅDNEKVAM MASKIN OG TRANSPORT AS | 999072615 | BERGEN |
| ADOLFSEN MASKIN OG TRANSPORT AS | 997040902 | SENJA |
| AD PROSJEKT BYGG AS | 996494225 | LIER |
| ADR ELEKTRO AS | 995981661 | OSLO |
| ADRIEN MANN AGENTURER AS | 985426732 | ULLENSAKER |
| AD RØR AS | 936653421 | NES |
| ADT BYGG AS | 935096545 | RINGSAKER |
| AELEKTRIKER AS | 923447067 | NAMSOS |
| AERIS AS | 989797425 | SKIEN |
| AERON AS | 937775741 | FLEKKEFJORD |
| AF DECOM AS | 992097442 | OSLO |
| AF ENERGI AS | 983480535 | OSLO |
| AF GRUPPEN NORGE AS | 938333572 | OSLO |
| A FINSTAD CAD AS | 921156790 | STEINKJER |
| AFI VANN OG VARME AS | 912348431 | FREDRIKSTAD |
| AFRY CONSULT AS | 934948262 | SARPSBORG |
| AFRY NORWAY ADVISORY AS | 883889762 | OSLO |
| AFRY NORWAY AS | 915229719 | OSLO |
| A. FURULUND ENTREPRENØR AS | 936204961 | ULLENSAKER |
| AGAIA AS | 942493894 | DRAMMEN |
| AGAVE STUDIO AS | 933498379 | NORDRE FOLLO |
| AGDE ARKITEKTUR AS | 924688815 | LYNGDAL |
| AGDER BETONG ENTREPRENØR AS | 920362877 | ARENDAL |
| AGDERBYGG AS | 963520913 | KRISTIANSAND |
| AGDER BYGG OG BETONG AS | 929988906 | KRISTIANSAND |
| AGDER BYGGPROSJEKTERING AS | 831083212 | KRISTIANSAND |
| AGDER BYGGTJENESTER AS | 914383528 | LILLESAND |
| AGDER EL INSTALLASJON AS | 985170266 | GRIMSTAD |
| AGDER FLISSERVICE AS | 921285434 | GRIMSTAD |
| AGDER GULV OG FLIS AS | 917705542 | GRIMSTAD |
| AGDER MESTERBYGG AS | 911881594 | ÅMLI |
| AGDERPLAN AS | 921877722 | HAUGESUND |
| AGDER RØR AS | 981712471 | KRISTIANSAND |
| AGDER SPRINKLER AS | 971216247 | BIRKENES |
| AGDER STEIN & GRUNNARBEID AS | 897569582 | FROLAND |
| AGDER TAK AS | 994975749 | VENNESLA |
| AGDER TAKSTSENTER AS | 916127197 | KRISTIANSAND |
| AGDER TREFIBERISOLERING AS | 936312861 | TVEDESTRAND |
| AGDER VENTILASJON AS | 988222704 | KRISTIANSAND |
| AGDER VVS AS | 930363162 | KVINESDAL |
| ÅGE HAVERSTAD AS | 989063030 | NORD-FRON |
| ÅGE NILSEN AS | 980860825 | TROMSØ |
| ÅGEO AS | 930885509 | STEINKJER |
| ÅGE REINFJORD - REINFJORD MASKIN | 969264536 | SØMNA |
| AGERSBORG BYGG AS | 914831938 | FÆRDER |
| AGF VVS AS | 921169523 | ARENDAL |
| AGILITEK AS | 834310252 | OSLO |
| AGNALT & HOLMEN AS | 927291657 | SARPSBORG |
| AGNAR BERGO AS | 912723038 | OSLO |
| AGNES TAKSTOLFABRIKK AS | 922789398 | LARVIK |
| AGRAFF ARKITEKTUR AS | 982787033 | TRONDHEIM |
| AGRIPA NORGE AS | 987411198 | SANDEFJORD |
| AGRIPA PROSJEKT AS | 920770835 | SANDEFJORD |
| AGROLINK AS | 990046468 | SARPSBORG |
| AGRO & MILJØ AS | 990853339 | FREDRIKSTAD |
| AG-RØR AS | 919497076 | BÆRUM |
| AGROSERVICE AS | 918685162 | NESBYEN |
| AGS BYGG AS | 998736226 | OSLO |
| A. HANSEN GRUPPEN AS | 963544731 | OSLO |
| AH BOLIG OG HYTTER AS | 928107817 | DRAMMEN |
| AH BYGG AUESTAD & HÅLAND AS | 974425246 | HÅ |
| AH BYGGSERVICE AS | 913803345 | NORDRE FOLLO |