 | RINGERIKSHUS AS | 889628782 | RINGERIKE |
| RING FORSKALING AS | 827156582 | RINGERIKE |
| RINGHUS SKIFER-MUR OG FLIS AS | 915507239 | VINJE |
| RINGJORD ELEKTRO AS | 925573779 | TROMSØ |
| RINGLI BYGG AS | 825542612 | ØYSTRE SLIDRE |
| RINGSAKER ELEKTRO AS | 911948745 | RINGSAKER |
| RINGSAKER VEGG- OG TAKELEMENTER AS | 983823920 | RINGSAKER |
| RINGSIDE RØRLEGGERBEDRIFT AS | 915407692 | OSLO |
| RINGSTAD BYGG AS | 982984947 | NES |
| RINGVOLL VVS OG VARMEPUMPETEKNISK AS | 996936333 | RÅDE |
| RINOR AS | 930774170 | RANA |
| RIPEL BYGG AS | 813864452 | DRAMMEN |
| RIPO FABRIKA AS | 912878465 | OSLO |
| RISA AS | 980404129 | HÅ |
| RISANGER & SØNN AS | 982146011 | HAUGESUND |
| 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 |
| R-K MASKIN AS | 921832656 | BALSFJORD |
| R K MONTASJE AS | 947948490 | SANDEFJORD |
| 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 |
| R. MJELDE AS | 998097266 | BERGEN |
| RMT AS | 919157658 | NORDREISA |
| R. NIELSEN ENTREPRENØR AS | 918529551 | OSTERØY |
| 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 |
| ROAN MASKIN AS | 916567383 | ÅFJORD |