| Pelin AS | Stokke | 2002 |
| Pelina AS | Haugesund | 2024 |
| Pelle B. Invest AS | Oslo | 2005 |
| Pellik AS | Oslo | 1975 |
| Pellips AS | Kråkerøy | 2025 |
| Pellips Finance AS | Nesttun | 2022 |
| Pellips Law Advokatfirma AS | Kråkerøy | 2023 |
| Pem Invest AS | Gjerdrum | 2015 |
| Pem Rådgivning AS | Gjerdrum | 2021 |
| Pemape AS | Stabekk | 2024 |
| Pemar AS | Oslo | 2013 |
| Pembina Pipeline Corporation Nuf | T2P 1G1 Calgary Alberta | 2024 |
| Pembroke Real Estate LLC | Boston Ma 02110 | 2017 |
| Pemco Invest AS | Oslo | 2011 |
| Pemet AS | Hvasser | 2018 |
| Pemoco AS | Oslo | 1993 |
| Pemy AS | Oslo | 2010 |
| Pen-Rock AS | Evje | 2008 |
| Pendo Consult AS | Oslo | 2016 |
| Pene Rom Boligstyling AS | Undrumsdal | 2019 |
| Pengcorp Norge AS | Stavanger | 2022 |
| Pengebalanse AS | Ålesund | 2023 |
| Pengebingen AS | Røyken | 1998 |
| Pengecompagniet II AS | Sandnes | 2015 |
| Pengeforlaget AS | Heggedal | 1987 |
| Pengegaloppen AS | Oslo | 2020 |
| Pengeporten AS | Hellevik I Fjaler | 2025 |
| Pengeråd AS | Hamar | 2014 |
| Pengineer AS | Vanvikan | 2004 |
| Penguin Invest AS | Oslo | 2020 |
| Peninsula Petroleum Services Ltd | Wirral Ch60 5An | 2011 |
| Peninsula Underwater Imaging | Ca-Sidney British Columbia V8L 4J1 | 2018 |
| Pennant AS | Fana | 2011 |
| Penny AS | Oslo | 2025 |
| Penor Consult AS | Fana | 1997 |
| Penpal AS | Sandnes | 2022 |
| Penrhiw Engineering Services Ltd | Np12 0Jh Blackwood | 2019 |
| Pensjonskonto AS | Lillestrøm | 2020 |
| Pensjonsplan AS | Strømmen | 2014 |
| Pensum Business Services AS | Oslo | 2020 |
| Pensum Group AS | Oslo | 2013 |
| Pentacon AS | Kongsvinger | 2002 |
| Pentagon Technical Services GmbH | De-10719 Berlin | 2025 |
| Pentair Thermal Management UK Limited | Washington Tyne & Wear Ne37 3Hx | 2011 |
| Pentatonic AS | Rådal | 2010 |
| Pentom-Energy Projects Ltd | St Helier Je2 4S | 2006 |
| Pentor AS | Oslo | 2017 |
| Pentz AS | Kråkerøy | 2022 |
| Peonia AS | Gjerdrum | 2025 |
| People & Organisation AS | Oslo | 2021 |
| People and Technology Inc | Kr-39422 Gyeongsangbuk-Do | 2023 |
| People Matters AS | Stavanger | 2025 |
| People Mode AS | Ålesund | 2023 |
| People Nordic AS | Son | 2019 |
| People-Consulting AS | Oslo | 2023 |
| Peoplepotential AS | Oslo | 2014 |
| Peoplesearch AS | Åros | 2024 |
| Peoplewithe AS | Stavanger | 2018 |
| Pep AS | Bergen | 2019 |
| Peplan AS | Oslo | 2013 |
| Pepper AS | Skiptvet | 1983 |
| Peppy Planet Consulting AS | Stavanger | 2023 |
| Pepsico Nordic Norway AS | Oslo | 1995 |
| Peptide Biotech AS | Sandefjord | 2024 |
| Pequod Expeditions AS | Oslo | 2006 |
| Per Andre AS | Holmsbu | 2002 |
| Per Arne Johnsen Holding AS | Hell | 2009 |
| Per C. Konterud & Co AS | Våler I Solør | 2022 |
| Per Carlsen AS | Asker | 2026 |
| Per Christian Epland Holding AS | Tananger | 2021 |
| Per Dahle Invest AS | Råde | 2022 |
| Per Eide Studio AS | Ulsteinvik | 2013 |
| Per Finne Industridesign AS | Voss | 2006 |
| Per Halgrim Piltingsrud AS | Hønefoss | 2013 |
| Per Henrik Sitt AS | Stathelle | 2005 |
| Per Hoff AS | Kjeller | 2008 |
| Per Høj AS | Oslo | 2001 |
| Per Ivar Birkeland AS | Sandnes | 2005 |
| Per Jørgensen Marketing AS | Ranheim | 2016 |
| Per L. Eide AS | Bergen | 1981 |
| Per Mare Ad Astra Nuf | Oslo | 2020 |
| Per Prøitz Messedesign AS | Oslo | 2005 |
| Per Sjøvold Holding AS | Selbu | 2018 |
| Per Sjøvold Invest II AS | Selbu | 2020 |
| Per Sjøvold Invest III AS | Selbu | 2020 |
| Per Steinar Moen AS | Trondheim | 2016 |
| Per Stensgaard Innovasjon AS | Oslo | 2013 |
| Per Thomsen Byg Aps | Dk-9640 Farsø | 2019 |
| Per Thorstensen Konsult AS | Notodden | 2026 |
| Per-Aage.Com AS | Porsgrunn | 2013 |
| Per-Olof Ludvig Samuelsson Nuf | Se-46 241 Vänersborg | 2026 |
| PER4M AS | Kolbotn | 2021 |
| Pera Regnskap AS | Oslo | 2024 |
| Perah AS | Jessheim | 2018 |
| Perak AS | Rjukan | 2017 |
| Perane AS | Ålesund | 1998 |
| Perani AS | Oslo | 2023 |
| Percento AS | Lierskogen | 2014 |
| Percentum Prosjektfinansiering AS | Oslo | 2014 |
| Percept AS | Kristiansand S | 2022 |