| Prioritet Renhold AS | Kleppestø | 2024 |
| Pristine Vent AS | Mysen | 2025 |
| Pritex AS | Alta | 2018 |
| Priva Organize AS | Oslo | 2024 |
| Privat Anlegg AS | Karlstad | 1998 |
| Privat Skadedyrkontroll AS | Stavern | 2018 |
| Privat Trygg Omsorg AS | Trondheim | 2020 |
| Private Nurse & Doctors Aps | 6700 Esbjerg | 2002 |
| Privatgartner AS | Stavanger | 2003 |
| Privathjelpen AS | Hobøl | 2016 |
| Privatvaktmester AS | Eidsvoll Verk | 2023 |
| Pro Bemanning AS | Eide | 2026 |
| Pro Boligvask Oslo & Omegn AS | Oslo | 2025 |
| Pro Eiendom AS | Lysaker | 1992 |
| Pro Kompetanse Da | Moss | 1998 |
| Pro Konsulent AS | Oslo | 2022 |
| Pro Media Concept Da | Hamar | 2000 |
| Pro Ocean Crew AS | Kalvåg | 2013 |
| Pro Padel AS | Nyborg | 2023 |
| Pro Rec Group AB | Se-117 59 Stockholm | 2020 |
| Pro Renhold AS | Oslo | 2021 |
| Pro Sales Holding Ans | Harstad | 1999 |
| Pro Search AS | Larvik | 2008 |
| Pro Sec Professional Security AS | Oslo | 1995 |
| Pro Service Oslo AS | Oslo | 2017 |
| Pro Solutions AS | Mjølkeråen | 2019 |
| Pro Stål Florø AS | Florø | 2012 |
| Pro Tek AS | Alta | 2023 |
| Pro Tibi AS | Rådal | 2021 |
| Pro-Drift AS | Stord | 2025 |
| Pro-Fio Wirtschaftsselbstihlfe | Sortland | 2009 |
| Pro-Pipe Support | 6800 Varde | 2008 |
| Pro-Sourcing AS | Oslo | 2016 |
| Pro-Teck AS | Frosta | 2005 |
| PRO3 HR & Bemanning AS | Hokksund | 2007 |
| Proact Finance AB | 164 28 Kista | 2010 |
| Proactima Project Services AS | Stavanger | 2007 |
| Proaktiv Renhold AS | Nyborg | 2022 |
| Probao AS | Lørenskog | 2000 |
| Problemet Løst AS | Nedre Eggedal | 2015 |
| Process Heat Systems Limited | Ennis Co Clare | 2015 |
| Proclean AS | Sandnes | 1986 |
| Procosafe Consulting AS | Oslo | 2011 |
| Procurement People AS | Oslo | 2018 |
| Prodan | Dk-8940 Randers Sv | 2026 |
| Prodent Tannreiser AS | Hervik | 2019 |
| Prodeser GDV SRL | Constanta | 2011 |
| Prodfab Utleie AS | Skotselv | 2019 |
| Prodrift AS | Ås | 2012 |
| Produsentpakkeriet Trøndelag AS | Frosta | 2005 |
| Prodvance AS | Stabekk | 1999 |
| Proenergy AS | Stavanger | 2006 |
| Proesco AS | Stavanger | 2016 |
| Profesjonell Service AS | Sandefjord | 2019 |
| Proff Booking AS | Oslo | 2023 |
| Proff Garasjevask AS | Drammen | 2020 |
| Proff Maskinutleie AS | Eidsvoll | 2022 |
| Proff Renhold AS | Krokelvdalen | 2000 |
| Proff RENHOLD1 AS | Oslo | 2018 |
| Proff Service & Vedlikehold AS | Hauglandshella | 2023 |
| Proff Service Partner AS | Florø | 2019 |
| Proff Servicesystemer Ans | Mosjøen | 2001 |
| Proff Vaktmaster Og Flis AS | Haugesund | 2025 |
| Proff-Service AS | Råde | 2017 |
| Proffbud AS | Oslo | 2024 |
| Proffbuss AS | Trøgstad | 2021 |
| Proffdrift AS | Nesttun | 2010 |
| Proffen Hytteservice Da | Tolga | 2005 |
| Proffgruppen AS | Trondheim | 2021 |
| Proffzone AS | Oslo | 2006 |
| Profiks Rental AS | Sandefjord | 2022 |
| Profil Golf AS | Jessheim | 2020 |
| Profil Vask AS | Florø | 2026 |
| Profile Sport and Media Limited | St Peter Port Gy1 4Hn | 2024 |
| Profit Netherland B.V. | 7324 Apeldoorn | 2019 |
| Profix Drift AS | Laksevåg | 2020 |
| Profondo Consulting AS | Tønsberg | 2016 |
| Profpower AS | Lier | 1987 |
| Progressa Skadedyrkontroll AS | Laksevåg | 2024 |
| Progressive Media Group Ltd | London Ec4Y 0An England | 2017 |
| Progruppen Renhold AS | Knapstad | 2019 |
| Prohav 1 AS | Rørvik | 2026 |
| Prohav 2 AS | Rørvik | 2026 |
| Project Crew Management AS | Kleppestø | 2014 |
| Project Silver Loft Ltd Nuf | Ky1-1205 Grand Cayman | 2026 |
| Proklean AS | Ski | 2020 |
| Promatic-B NV Nuf | Be-9880 Aalter | 2026 |
| Promediqa Norge AS | Oslo | 2024 |
| Promethean Limited | Blackburn Lancashire Bb1 5Th | 2010 |
| Promiso AS | Drammen | 2016 |
| Promiso Sørøst AS | Drammen | 2014 |
| Promo AS | Tranby | 2003 |
| Promo Group AS | Lierstranda | 2015 |
| Promo X Da | Fevik | 2001 |
| Promotion Player Management AS | Oslo | 2022 |
| Pronto! AS | Oslo | 2012 |
| Proof-It Da | Oslo | 2007 |
| Proofly AS | Stavanger | 2026 |
| Propcare AS | Sandefjord | 2026 |
| Propcaren Da | Oslo | 2020 |