| Pergaco AB | Abborveien 10B, 18130 Lidingö | 1998 |
| Peria Enviro AS | Oslo | 2025 |
| Perle Brød AS | Oslo | 2024 |
| Permanor AS | Haugesund | 1998 |
| Permanor Brumunddal AS | Haugesund | 2016 |
| Pernille Ans | Klokkarstua | 1998 |
| Pers Rammeverksted AS | Gjøvik | 1987 |
| Persolit Entreprenørfirma | Dk-5330 Munkebo | 2012 |
| Personlige Gaver AS | Harestua | 2022 |
| Pertenta Flytebrygger AS | Harstad | 2026 |
| Peson Boats AS | Oslo | 2026 |
| Pesquera Lota Protein Ltda | Ålesund | 2003 |
| Pestan of Scandinavia AS | Stjørdal | 2016 |
| Petal AS | Vik I Sogn | 2016 |
| Peter Riedel GmbH | De-08352 Raschau-Markersbach | 2022 |
| Petersborg Invest AS | Halden | 2010 |
| Petit Grafisk AS | Skien | 1997 |
| Petosan AS | Haukeland | 2002 |
| Petpack Drikker AS | Aurskog | 2016 |
| Petrolvalves Spa | It-20122 Milan | 2022 |
| Petroservice Nuf | Laksevåg | 2026 |
| Pettco Service AS | Nesbru | 2025 |
| Petter AS | Mosby | 2005 |
| Petter Nervik AS | Verdal | 1975 |
| Petter Nervik Bakeri AS | Verdal | 2007 |
| Petters Sveis Og Rep AS | Helle | 2015 |
| Pettersen Industri & Anlegg AS | Flekkerøy | 2024 |
| Pettersplassen Snekkeri AS | Røyse | 1995 |
| PF Montasje AS | Sarpsborg | 2022 |
| Pfi Instruments AS | Løten | 2014 |
| Pfisterer Kontaktsysteme GmbH | De-73650 Winterbach | 2021 |
| Pfizer Service Company Bvba | Be-1930 Zaventem | 2015 |
| PG Flow Solutions AS | Sande I Vestfold | 2020 |
| PGM Portgermany Metall Und Rohrleitungsbau & Schweisstechnik Gmbh&Co KG | De-26180 Rastede | 2023 |
| PGS Hakrima AS | Tollå | 2023 |
| PGS Holding AS | Ljørdalen | 2005 |
| PH Thorstensen AS | Oslo | 1986 |
| Phab No Branch Nuf | Sofiemyr | 2019 |
| Pharma Marine AS | Søvik | 2007 |
| Pharma Production AS | Oslo | 2017 |
| Pharmalab AS | Oslo | 1995 |
| Pharmaq AS | Overhalla | 2004 |
| Pharmatech AS | Rolvsøy | 2002 |
| Pharmavax AS | Ski | 2021 |
| Pharmavax Holding AS | Ski | 2022 |
| Philip Hauge AS | Nesttun | 2017 |
| Philip Morris Investmenst B.V. | 4622Rd Bergen Op Zoom | 2019 |
| Photosynthetic AS | Oslo | 2025 |
| Phu Jamniuk-Group Joanna Jamniuk-Miglujewicz | Pl 66-436 Slonsk | 2019 |
| Pielle SRL | It-31053 Pieve Di Soligo | 2022 |
| Pierre Robert Group AS | Oslo | 1956 |
| Pigs Imaging AS | Oslo | 2019 |
| Piiin Holding AS | Flekkefjord | 2024 |
| Pikekyss AS | Rødøy | 2015 |
| Pikene På Torget AS | Hitra | 2010 |
| Pil & Bue AS | Tomter | 2011 |
| Pil AS | Halden | 2023 |
| Pilkington Floatglas AB | 301 80 Halmstad | 2004 |
| Pilkington Igp SP. Zo.O. | Pl-27-600 Sandomierz | 2021 |
| Pilkington Norge AS | Elverum | 1973 |
| Pillartec Nuf | 75-520 Szczecin | 2017 |
| Pillop AS | Geilo | 2013 |
| Piltingsrud Gard AS | Begna | 2018 |
| Pind AS | Åmot | 2023 |
| Pink Salmon Norway AS | Strømmen | 2022 |
| Pinovo AS | Bekkjarvik | 2007 |
| Pinturas Sabi S.A. | Es-39409 San Felices De Buelna | 2019 |
| Pioner Boat AS | Bjørkelangen | 2006 |
| Piotr Smieszny | Pl-42-520 Dabrowa Gornicza | 2024 |
| Pipe Clamp AS | Stavanger | 2012 |
| Pipe Systems Engineering AS | Gursken | 2009 |
| Pipebrød AS | Sandefjord | 2015 |
| Pipelife Norge AS | Surnadal | 1998 |
| Pipeline Engineering & Supply Co Ltd | Ab15 9Pe Aberdeen | 2006 |
| Pipeliner AS | Hylkje | 2014 |
| Pistol Energy AS | Lillestrøm | 2024 |
| Pistol Energy Holding AS | Lillestrøm | 2024 |
| Piteå Härdteknik Nuf | 943 31 Øjebyn | 2012 |
| Piteå Industriteknik AB | 94336 Öjebyn | 2019 |
| Pitt Pott Nøtt Ans | Drammen | 1994 |
| Pivab AB Nuf | 432 67 Veddige | 2015 |
| Pizza Italiano AS | Lørenskog | 2024 |
| Pizza Marco Polo Ans | Halden | 1998 |
| Pizzakjører'N Norge AS | Moss | 2012 |
| Pizzakokken Da | Arendal | 1995 |
| Pièces Uniques Jewelry AS | Oslo | 2016 |
| Pjama AB Nuf | Se-21853 Klagshamn | 2023 |
| Pjaskeriet AS | Bygland | 2020 |
| PJT Holding AS | Gjøvik | 2015 |
| Pjv-Process Team OY | 32800 Kokemäki | 2008 |
| Pk-Ved AS | Sandefjord | 2023 |
| Pke Holding AS | Oslo | 2005 |
| PL Hyraulik & Maskin AB Nuf | Se-820 77 Gnarp | 2014 |
| Pla-Mek AS | Sykkylven | 1992 |
| Plamek Fabric Production AS | Krøderen | 2023 |
| Plan-Bygg AS | Sande I Vestfold | 1968 |
| Plankebyen Næringspark AS | Fredrikstad | 2001 |
| Plankejens AS | Fredrikstad | 2016 |
| Planktonic AS | Trondheim | 2008 |
| Plant Foods AS | Jessheim | 2023 |