 | PROSJEKTMESTER AS | 994093312 | OSLO |
| PROSJEKTRÅDGIVEREN AS | 996460673 | BODØ |
| PROSJEKTRÅD INNLANDET AS | 963481519 | KONGSVINGER |
| PROSJEKTSTYRING VEST AS | 990353913 | ASKØY |
| Prosjekt Systemer AS | 936217494 | GLOPPEN |
| PROSJEKTUTVIKLING MIDT-NORGE AS | 943317739 | TRONDHEIM |
| PROSTIK AS | 990843333 | KLEPP |
| PROTAKST KIRKENES AS | 928887847 | SØR-VARANGER |
| PROTAN ENTREPRENØR AS | 983386393 | LIER |
| PROTAN ENTREPRENØR MIDT-NORGE AS | 914613922 | TRONDHEIM |
| PROTAN TAKSERVICE AS | 977102499 | ALTA |
| PRO-TAX AS | 833356062 | MOSS |
| PROTAX ENTREPRENØR AS | 930379433 | OSLO |
| PROTEKNO AS | 997971558 | TØNSBERG |
| PROTEKS HATLESTAD | 932001284 | BERGEN |
| PROTOM BYGG AS | 999537111 | ÅS |
| PRO TOTALBYGG AS | 886119372 | OSLO |
| PROVENO AS | 927566311 | TRONDHEIM |
| PRO-VENT AS | 985037906 | BERGEN |
| PRO VVS OSLO AS | 923804609 | ULLENSAKER |
| PROXLL AS | 976950860 | OSLO |
| PS ANLEGG AS | 912561798 | GRIMSTAD |
| P S HÅLAND RØR AS | 980926826 | TIME |
| PSLAND AS | 926375474 | BERGEN |
| PSV ELEKTRO AS | 920753183 | ULLENSAKER |
| PSW POWER & AUTOMATION AS | 982574145 | ØYGARDEN |
| PTG KULDETEKNISK AS | 986165460 | TROMSØ |
| PTG MULTI KULDE AS | 979843445 | BODØ |
| PTP AS | 914968623 | ENEBAKK |
| PUKK & GRAVESERVICE DRIFT AS | 915497640 | SANDEFJORD |
| PULS ARKITEKTER AS | 977503264 | OSLO |
| P UNDHEIM AS | 984079834 | TIME |
| PUR ARKITEKTUR AS | 915464378 | OSLO |
| PUSHAK AS | 992309318 | OSLO |
| PUSSMESTER AS | 918721371 | OSLO |
| PV ARKITEKTER AS | 966540249 | LARVIK |
| PV EIENDOM AS | 911608774 | STAVANGER |
| PX SOLUTIONS AS | 992074299 | DRAMMEN |
| PZ SERVICE AS | 912168646 | OSLO |
| Q2 ARKITEKTER AS | 990964599 | ARENDAL |
| QBYGG1 CZAJEWSKI | 923167617 | SKIEN |
| QDP ARKITEKTER AS | 819498822 | FROGN |
| QGS AS | 919880503 | ASKER |
| QPS AS | 998432839 | LEVANGER |
| Q RÅDGIVNING AS | 932935031 | HAUGESUND |
| QUADRAT BYGG AS | 928866297 | TROMSØ |
| QUALE MASKIN VED FRODE KNUTSEN | 995183145 | LYNGDAL |
| QUIPU AS | 927409127 | FREDRIKSTAD |
| R1 ENTREPRENØR AS | 990684650 | FLESBERG |
| R3 ENTREPRENØR AS | 971170824 | OSLO |