 | PROFF RØRLEGGER AS | 911640228 | LILLESTRØM |
| PROFF RØR-SERVICE AS | 931830066 | NORDRE FOLLO |
| PROFF RØRSERVICE AS | 920045685 | OSLO |
| PROFF SNEKKERSERVICE AS | 930347698 | OSLO |
| PROFFTAK TRØNDELAG AS | 921524757 | TRONDHEIM |
| PROFF-VVS HUSSEIN | 931096737 | ASKER |
| PROFF ZAK AS | 830542752 | OSLO |
| PROFILBYGG TRONDHEIM AS | 990058377 | TRONDHEIM |
| PROFIL MONTASJE AS | 992506660 | PORSGRUNN |
| PROFILTEAM AS | 938184275 | HAMAR |
| PROFIL TREBYGG AS | 888488332 | FLESBERG |
| PROGETTO AS | 898072312 | DRAMMEN |
| PROGRUPPEN AS | 815098412 | INDRE ØSTFOLD |
| PRO GRUPPEN NORWAY AS | 925719242 | ENEBAKK |
| PRO INVENIA AS | 993404381 | TRONDHEIM |
| PROJEKT PLANUNG AS | 964105944 | OSLO |
| PROKLIMA CONSULTING AS | 924712538 | ASKER |
| PROLED AS | 924914831 | STORD |
| PROMO ENTREPRENØR AS | 921217641 | OSLO |
| PROMOSTAL AS | 817317812 | DRAMMEN |
| PRO PARTNERS AS | 919857013 | OSLO |
| PRO-PIPE NORWAY AS | 891847122 | DRAMMEN |
| PROPLAN BYGG AS | 915332870 | SKAUN |
| PROPOINT SURVEY AS | 988912859 | BÆRUM |
| PROREF AS | 931465457 | RÆLINGEN |
| PRORIV AS | 832799742 | OSLO |
| PRORØR AS | 923116702 | TRONDHEIM |
| PRORØRSERVICE AS | 929054156 | OSLO |
| PROSJEKTBYGG AS | 966768673 | HERØY (MØRE OG ROMSDAL) |
| PROSJEKT & ENØK PARTNER AS | 996048616 | TØNSBERG |
| PROSJEKTFORM AS | 999156185 | TINN |
| PROSJEKTGRUPPEN AS | 993808415 | KRISTIANSAND |
| PROSJEKTIL AS | 982314097 | STAVANGER |
| PROSJEKTIL KONSTRUKSJON AS | 979459653 | STAVANGER |
| PROSJEKT KONSULT AS | 956435226 | HAUGESUND |
| PROSJEKTKONTROLL AS | 932041367 | SULA |
| PROSJEKTMESTER AS | 994093312 | OSLO |
| 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 |