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| RISDAL AS | 913855728 | NORD-FRON |
| RISKA SVEIS AS | 933767027 | SANDNES |
| RISOLVE AS | 997667174 | ELVERUM |
| RISØR HEIS OG ELEKTROSERVICE AS | 994272683 | RISØR |
| RISØY BYGG AS | 888106332 | ØYGARDEN |
| RISSA KRAFTLAG SA | 915420400 | INDRE FOSEN |
| RIVAS BYGG AS | 933089975 | TRONDHEIM |
| RIVCO AS | 982990963 | KRISTIANSAND |
| RIVENES AS | 915428940 | BERGEN |
| RIVE- OG KNUSESERVICE AS | 980042529 | KRISTIANSAND |
| RIVIER AS | 832185612 | OSLO |
| RIWO AS | 915621902 | ASKØY |
| R. JEGTEBERG AS | 925274321 | BYKLE |
| RJ MASKIN Ronny Johannessen | 982567785 | SELJORD |
| RJUKAN VVS & ELEKTRO AS | 982142601 | TINN |
| RKF STÅLBYGG AS | 991100016 | GOL |
| RK MASKIN & TRANSPORT AS | 921832656 | BALSFJORD |
| R K MONTASJE AS | 947948490 | TØNSBERG |
| RK MUR AS | 997802659 | HOLMESTRAND |
| RKS ENTREPRENØR AS | 989656570 | INDRE ØSTFOLD |
| RK TEKNISKE AS | 991061193 | STAVANGER |
| RMB- AS | 998474728 | LILLESTRØM |
| RM BYGG & BETONG AS | 927405512 | NORD-FRON |
| RM BYGGFORNYING AS | 918430172 | RINGERIKE |
| RMC EIENDOM AS | 922859779 | GRIMSTAD |
| RM PLAN AS | 934775937 | RINGERIKE |
| RMT AS | 919157658 | NORDREISA |
| RØA ELEKTRISKE AS | 983188524 | OSLO |
| RØA INVEST BYGG AS | 988940119 | OSLO |
| ROALDHUS AS | 934454421 | GISKE |
| ROALD JOHANSEN INGENIØRFORRETNING AS | 960917227 | ALTA |
| ROALD MADSEN AS | 925510610 | TROMSØ |
| ROALD ØEN AS | 922820198 | SOGNDAL |
| ROALD SERVICE AS | 934397045 | GISKE |
| ROAN MASKIN AS | 916567383 | ÅFJORD |
| ROAR OLSEN | 969951355 | KRISTIANSAND |
| ROASTORM BYGG AS | 998524172 | ØVRE EIKER |
| ROBERT ROLLAND AS | 912402622 | BERGEN |
| ROBERT RØRLEGGER ROBERT NIEMIEC | 915417485 | OSLO |
| ROBERTS AS | 918282688 | IBESTAD |
| ROBERTSEN & SLOTNES AS | 953710765 | SKJERVØY |
| Robertson Nordisk A/S | 915436595 | TRONDHEIM |
| ROB MASKIN AS | 996719308 | FARSUND |
| ROBO HOLDING AS | 989245430 | MELHUS |
| ROCKS ENTREPRENØR AS | 995617781 | HÆGEBOSTAD |
| RODA AGRI MASKIN AS | 996657728 | STAVANGER |
| RØD BRANNTEKNIKK AS | 931400169 | SARPSBORG |
| RØD BYGG OG EIENDOM AS | 924368608 | FREDRIKSTAD |
| RODEO ARKITEKTER AS | 915062296 | OSLO |