 | QUIPU AS | 927409127 | FREDRIKSTAD |
| QVALBEIN & RAVNDAL AS | 930830151 | VINDAFJORD |
| R1 ENTREPRENØR AS | 990684650 | FLESBERG |
| R25 ARKITEKTER AS | 924620781 | NORDRE FOLLO |
| R3 ENTREPRENØR AS | 971170824 | OSLO |
| R3 MONTASJE AS | 922277672 | SKIEN |
| RAA BYGG AS | 813688662 | BERGEN |
| RAAD AS | 928898474 | ØVRE EIKER |
| RAAEN DICK | 970101543 | ØVRE EIKER |
| RAA GRAVESERVICE AS | 988856762 | RAKKESTAD |
| RAANÆS ARNE MAGNUS | 970399925 | ENEBAKK |
| RAASOK BYGG | 994832441 | INDRE ØSTFOLD |
| RABB84 AS | 913129504 | SKIEN |
| RAD BYGG AS | 916675828 | STAVANGER |
| RÅDE GRAVESERVICE AS | 917447373 | MOSS |
| RÅDE RØRLEGGERSERVICE AMUNDSEN | 929596552 | MOSS |
| RÅDGIVENDE INGENIØRER LØYNING AS | 968469029 | KRISTIANSAND |
| RÅDGIVERHUSET AS | 999539491 | FREDRIKSTAD |
| RADONMANNEN AS | 998384125 | LILLESTRØM |
| RÆDERGÅRD ENTREPRENØR AS | 917570884 | ØRLAND |
| RAFOS ENTREPRENØR AS | 897676842 | RINGSAKER |
| RAFTEVOLD ARVID | 970405615 | VOLDA |
| RAGNAR AAS AS | 945530006 | EVJE OG HORNNES |
| RAGNAR BOVIM ARKITEKT MNAL | 891965702 | OSLO |
| RAGNAR KONSTAD | 969999811 | MELHUS |
| RAGNAR SUNDET | 996997847 | FROSTA |
| RAGNAR SVENSEN AS | 932241536 | STAVANGER |
| RÅHOLT BYGG OG EIENDOMSSERVICE AS | 916554036 | EIDSVOLL |
| RAIDON AS | 916165536 | LILLESTRØM |
| RAIL INFRASTRUCTURE AS | 918052194 | OSLO |
| RAJ ELEKTRO AS | 925414212 | RÅDE |
| RAK ARKITEKTUR AS | 912077640 | OSLO |
| RAKKESTAD TRE OG BETONG AS | 925118729 | RAKKESTAD |
| RAKON BYGG AS | 976261593 | TRONDHEIM |
| RÅK UTVIKLING AS | 928964957 | VESTVÅGØY |
| RAM ARKITEKTUR AS | 986771735 | LILLEHAMMER |
| RAMBØLL NORGE AS | 915251293 | OSLO |
| RAM BYGGELEDELSE AS | 913787374 | ÅLESUND |
| RAM ENTREPRENØR AS | 913787285 | ÅLESUND |
| RAMIRENT AS | 984820011 | LILLESTRØM |
| RAMIZ SAFDAR AS | 923750886 | ÅS |
| RAMLOS AS | 915285988 | OS (INNLANDET) |
| RAMM CONSULT AS | 913205634 | BERGEN |
| RAMP AS | 992869224 | STAVANGER |
| RAMSDAL MASKIN AS | 998819105 | KINN |
| RAMSFJELL ARKITEKTER AS | 988464767 | BÆRUM |
| RAMSTAD RØRLEGGERSERVICE AS | 930949191 | NORDRE FOLLO |
| RAMUDDEN NORGE AS | 913798317 | ÅS |
| RANA ENTREPRENØR AS | 950271728 | RANA |
| RANAHYTTA AS | 925269506 | RANA |