| Propellfly AS | Oslo | 2016 |
| Proper Staffing AS | Sandnes | 2019 |
| Propero IT AB | Se-182 79 Stocksund | 2020 |
| Property Developments Ltd | Chapel Crewe Cw4 7Ea | 2020 |
| Property Pro AS | Oslo | 2026 |
| Property-Group AS | Kristiansand S | 2016 |
| Proposal Dekor AS | Oslo | 2025 |
| Prorec AS | Nesttun | 2013 |
| Proren AS | Gjerdrum | 2025 |
| Prorens AS | Oslo | 2003 |
| Prorent AS | Oslo | 2016 |
| Prosafe AS | Oslo | 1997 |
| Prosafe Holding AS | Oslo | 2025 |
| Prosafe Rigs Pte Ltd Nuf | Oslo | 2015 |
| Prosafe SE | Oslo | 1997 |
| Prosecure AS | Skien | 2024 |
| Proserv UK Ltd | Westhill Ab32 6Fj | 2010 |
| Proserve AS | Tistedal | 2004 |
| Proserve Eiendom AS | Tistedal | 2013 |
| Proserve Holding AS | Tistedal | 2017 |
| Proshop Europe | Dk-8200 Aarhus | 2015 |
| Prosjekt & Markeds Konsult AS | Oslo | 2001 |
| Prosjekt Og Eiendomsdrift AS | Oslo | 2026 |
| Prosjekt Vask AS | Tjodalyng | 2016 |
| Prosjektutleie AS | Fornebu | 1996 |
| PROSJEKTUTVIKLING1 AS | Sandnes | 2022 |
| Prosperia AS | Bjorbekk | 2025 |
| Protect Vakthold & Sikkerhet AS | Sande I Vestfold | 2015 |
| Protect Vakthold & Sikkerhet Sande AS | Sande I Vestfold | 2015 |
| Protectus AS | Oslo | 2005 |
| Protege AS | Lysaker | 2019 |
| Protegit AS | Ski | 2021 |
| Protek Service AS | Fannrem | 2012 |
| Proteus European Recruitment Limited | | 2013 |
| Protid AS | Sandefjord | 1998 |
| Protocall Consulting Services Nuf | Oslo | 2022 |
| PROTOCOL47 AS | Bergen | 2017 |
| Proton Eiendomsservice AS | Lommedalen | 2025 |
| Proton Gruppen AS | Hobøl | 2009 |
| Prounite AS | Oslo | 2016 |
| Provdrift AS | Heimdal | 2018 |
| Proviso AS | Trollåsen | 2007 |
| Prpax AS | Kristiansand S | 2025 |
| PRT Capital AS | Skien | 2003 |
| PRT Travel Norge Da | Fredrikstad | 2004 |
| Prunus Holding AS | Mo I Rana | 2019 |
| Prvda AS | Knarrevik | 2025 |
| Prysmian Group Denmark | Dk-2620 Albertslund | 2020 |
| Prå Eiendom AS | Kragerø | 2008 |
| Prærien Holding AS | Trondheim | 2005 |
| PS Anleggsgartner AS | Mandal | 2006 |
| PS Assets AS | Hagan | 2026 |
| PS Cleaning and Renovation AS | Oslo | 2016 |
| PS Finance Group AS | Oslo | 2011 |
| PS Industrimontasje AS | Rakkestad | 2024 |
| PS Rental AS | Solbergelva | 2025 |
| PS Selskapsutleie AS | Randaberg | 2023 |
| PS Selskapsutleie Holding AS | Randaberg | 2024 |
| PS Utleie AS | Mandal | 2021 |
| PSP AS | Gardermoen | 2015 |
| PSS Professional Service Solution AS | Oslo | 2014 |
| Psstømrerfirma AS | Hønefoss | 2023 |
| Pstamp BV | 4927 Bp Hooge Zwaluwe | 2012 |
| Psupply AS | Mo I Rana | 2016 |
| Psynergy AS | Loddefjord | 2023 |
| Ptas Aker Solutions SDN BHD Brunei | Bn-Ka3131 Brunei Darussalam | 2023 |
| PTC Sweden AB | Se-412 50 Göteborg | 2020 |
| Pti AS | Oslo | 2008 |
| Pto Maskin AS | Eidsvoll Verk | 2015 |
| PTR AS | Skien | 2012 |
| PTR Record 26 Ltd Nuf | N146Qh, London, Southgate | 2010 |
| Public Control Management AS | Trondheim | 2002 |
| Public Nova Security AS | Lillestrøm | 2017 |
| Public Property Drift AS | Oslo | 2020 |
| Public Security AS | Oslo | 2016 |
| Publiq AS | Sundebru | 2013 |
| Pudr AS | Narvik | 2023 |
| Puerto Princesa Services Limited | Aberdeen Ab22 8Ql Scotland | 2020 |
| Puffin Safari AS | Bleik | 2006 |
| Puglisevich Crews and Services Limited | Ca-St. John'S, Newfoundland A1 A5J | 2018 |
| Pukka Travels International AS | Bøstad | 2017 |
| Pukka Travels Norway AS | Tromsø | 2018 |
| Pukka Travels Sales AS | Tromsø | 2022 |
| Pulpit Rib AS | Jørpeland | 2026 |
| Pulse Audio Da | Birkeland | 2023 |
| Pulspadel AS | Levanger | 2025 |
| Pulsverk AS | Fredrikstad | 2023 |
| Pumbamemez AS | Drammen | 2022 |
| Pump Supply Holding AS | Solbergelva | 2025 |
| Punktlig Renhold Da | Tromsø | 2000 |
| Pur Service AS | Hokksund | 2018 |
| Pura Vedlikehold AS | Østerås | 2020 |
| Purchase-Assist AS | Fyllingsdalen | 2020 |
| Pure Arctic AS | Senjahopen | 2024 |
| Pure Aurora AS | Tromsø | 2026 |
| Pure Future Lab AS | Lørenskog | 2011 |
| Pure Invest Da | Oslo | 2006 |
| Pure Liquid AS | Asker | 2018 |
| Pure Madness AS | Voss | 2020 |
| Pure Minerals AS | Steinkjer | 2021 |