| Personaltjenester Telemark AS | Skien | 2001 |
| Personell AS | Alta | 2017 |
| Personellgruppen AS | Blomsterdalen | 2016 |
| Personellsikring AS | Oslo | 2019 |
| Personlig Gravstell Kvinnherad AS | Husnes | 2020 |
| Personnel Services International Ltd | Guernsey Gy1 4Hq England | 2009 |
| Personsikkerhet AS | Fetsund | 2025 |
| Persoplast Recruitment GmbH Nuf | De-72116 Mössingen | 2024 |
| Persøy Eiendom AS | Levanger | 1993 |
| Persøy Lift & Maskinutleie AS | Levanger | 2005 |
| Pes Transport Og Graving AS | Lier | 2006 |
| Pestco Top Holding AS | Oslo | 2022 |
| Peta AS | Mysen | 2001 |
| Peter Henriksen AS | Tofte | 2024 |
| Peter Invest AS | Florvåg | 2026 |
| Petersen Brothers Da | Høvik | 2002 |
| Petersen Skonnord Eiendomsservice AS | Ridabu | 2020 |
| Petit Bourgogne by T&T Wine AS | Oslo | 2021 |
| Peto AS | Kjøllefjord | 1991 |
| Petors AS | Hommelvik | 2005 |
| Petrodrill Holdings Inc | Stavanger | 2000 |
| Petrogramme Management Services Nuf | Nr321Pj Lowestoft | 2011 |
| Petrole Interim Service | Ch-Carouge 1227 | 1999 |
| Petroleum Geo-Services Inc. | Oslo | 2013 |
| Petrolia SE Nuf | Oslo | 2012 |
| Petrolia Tool Pool AS | Oslo | 2011 |
| Petrophysics Pty Ltd | Au-Sorrento Wa 6020 | 2014 |
| Petrowell Limited | Altens Aberdeen Ab12 3Lf Scotland | 2012 |
| Petter a Olsen Maskinutleie AS | Vesterøy | 2015 |
| Petter Kristensen Holding AS | Larvik | 2005 |
| Petter Northug Holding AS | Mosvik | 2011 |
| Petter På Skjæret AS | Herøy | 2021 |
| Petter Storm Olsen Holding AS | Lørenskog | 2009 |
| Pettersen Elteam AS | Tromsdalen | 2023 |
| Pettersen Utemiljø AS | Halden | 2020 |
| Pettersen-Utleie AS | Fetsund | 2023 |
| Pettvaskamsvåg AS | Valsøyfjord | 2019 |
| Peugeot Citroen Gestion Internationale SA | Ch-1207 Geneve | 2014 |
| Pewisa AS | Sætre | 2016 |
| Pfizer Enterprises Sarl | Oslo | 1999 |
| PG Kjøp AS | Oslo | 1968 |
| Pga Consult AS | Oslo | 2020 |
| Pga Lås AS | Nordkisa | 2025 |
| PGM Technologies GmbH Nuf | De-63584 Gruendau | 2024 |
| PGM Technologies Ltd Nuf | S64 9Qp Doncaster | 2024 |
| PGS Marine Services Isle of Man Ltd | Oslo | 2002 |
| PGS Shipowner AS | Oslo | 2019 |
| PGT AS | Drammen | 2024 |
| PGT Bilutleie AS | Berg I Østfold | 2025 |
| PGT Holding AS | Oslo | 2010 |
| Pharm Match Norge AS | Oslo | 2024 |
| Pharma-Team AS | Nesøya | 2021 |
| Pharmalink Baslakemedel AB Norge | Oslo | 1996 |
| Pharmarelations AS | Oslo | 2018 |
| Phenix Holding AS | Hosle | 2016 |
| Phenix Human Capital AS | Hosle | 2018 |
| Philip Morris Baltic Uab | Oslo | 2011 |
| Philip Oliver Services Limited | Suffolk Nr32 2Hd | 2012 |
| Philips Morris GmbH | Oslo | 2013 |
| PHM Boligservice AS | Oslo | 2025 |
| PHM Norge AS | Oslo | 2020 |
| PHM Skadedyrkontroll AS | Oslo | 2020 |
| Phoenix Gruppen AS | Dokka | 2026 |
| Phonecom AS | Harstad | 2025 |
| Phonepros Norway Ltd Nuf | Flateby | 2024 |
| Phungi Records Da | Stavanger | 1997 |
| Piano Software | Us-Philadelphia Pa 19106 | 2021 |
| Picas AS | Asker | 2019 |
| Pichon AS | Oslo | 2018 |
| Pickjob Spolka Z Ograniczona Odpowiedzialnoscia | Pl-72-600 Swinoujscie | 2025 |
| Pigging & Design Services Limited | Northumberland Ne63 9Fb | 2016 |
| Pike & Peak AS | Røyken | 2016 |
| Pike Access Ltd | Sheffield S10 4Lf England | 2018 |
| Pikku-Suomi AS | Bugøynes | 2020 |
| Pikkuskitsi Ans | Vestre Jakobselv | 2001 |
| Pilar People AS | Asker | 2019 |
| Pilares Garanti AS | Oslo | 2018 |
| Pilen Systemer Ans | Oslo | 1999 |
| Pilgrimstjeneste Drift AS | Minnesund | 2008 |
| Pilot & Aviation Support Ltd Nuf | Stjørdal | 2018 |
| Pilot Anlegg AS | Heimdal | 2020 |
| Pilot Consult AS | Hosle | 1998 |
| Pilot Rentals AS | Heimdal | 2004 |
| Pilot Utleie AS | Heimdal | 2001 |
| Pinbar AS | Kleppestø | 1996 |
| Pinpoint Media Da | Oslo | 2011 |
| Pioner Finans AS | Trondheim | 2021 |
| Pionèr Holding AS | Indre Kvarøy | 2014 |
| Pipe Support NE Limited | Tyne & Wear Ne37 1Ez | 2017 |
| Pipebarge 1 AS | Oslo | 2013 |
| Pipefix AS | Eidsvåg I Romsdal | 2016 |
| Pipetech Holdings Norway AS | Sandnes | 2018 |
| Pipetech International AS | Sandnes | 1988 |
| Piren Pub & Tall AS | Mandal | 2018 |
| Pireus AS | Drammen | 2016 |
| Piston Events AS | Hurdal | 2025 |
| Pit Holding AS | Alta | 2021 |
| Pitch Production Ans | Oslo | 1998 |
| Pitchpeak Group AS | Skedsmokorset | 2025 |
| Pitz AS | Drammen | 2017 |