| Praevado AS | Professional & scientific | 2001 |
| Pragma Panda Holding AS | | 2022 |
| Preg Barnehager Åssiden AS | Education | 2022 |
| Prem AS | Construction | 2024 |
| Premie-Ringen AS | Wholesale & retail | 1986 |
| Premium Motors AS | Wholesale & retail | 2025 |
| Premium Security AS | Administrative & support | 2022 |
| Prendes AS | Professional & scientific | 1992 |
| Preppi AS | Wholesale & retail | 2016 |
| Presco AS | | 2023 |
| Presidion AS | Professional & scientific | 2020 |
| Presidion Invest AS | | 2024 |
| Prestaker Consulting AS | Information & communication | 2024 |
| Prestaker Eiendom AS | Real estate | 2000 |
| Prestegårdshagen Balløkke SA | Real estate | 2020 |
| Prestegårdshagen Lekeplass 1 SA | Real estate | 2020 |
| PRH Konsulent Og Rådgivning AS | Professional & scientific | 2020 |
| PRH Regnskaps- Og Økonomitjenester AS | Professional & scientific | 2018 |
| Prima Sjokolade AS | Wholesale & retail | 2002 |
| Primabygg Og Anlegg AS | Construction | 2011 |
| Primax AS | Professional & scientific | 2011 |
| Prime AS | Professional & scientific | 2004 |
| Prime Motor AS | Wholesale & retail | 2025 |
| Primecar AS | Wholesale & retail | 2026 |
| Prince Transport AS | Transport & logistics | 2011 |
| Pro Gulvlegger AS | Construction | 2024 |
| PRO3484 AS | Real estate | 2014 |
| Procab AS | Wholesale & retail | 2000 |
| Proerigo AS | Information & communication | 2022 |
| Profesjonell Maler AS | Construction | 2024 |
| Proff Garasjevask AS | Administrative & support | 2020 |
| Proff Ressursen Konsulent AS | Professional & scientific | 2025 |
| PROFF1 Montasjemateriell Drammen AS | Wholesale & retail | 2021 |
| Proffen Invest AS | | 2026 |
| Progas Norge AS | Wholesale & retail | 1997 |
| Progetto AS | Real estate | 2012 |
| Prograde Solutions AS | Professional & scientific | 2025 |
| Progresso AS | Professional & scientific | 1973 |
| Prois Holding AS | | 2021 |
| Project Burgers AS | Hospitality | 2023 |
| Projektorpøblene AS | Information & communication | 2016 |
| Prolek AS | Wholesale & retail | 2011 |
| Prominent Norge AS | Wholesale & retail | 1988 |
| Promiso AS | Administrative & support | 2016 |
| Promiso Sørøst AS | Administrative & support | 2014 |
| Promostal AS | Construction | 2016 |
| Pronorse Da | Wholesale & retail | 1996 |
| Property Management Norge AS | Real estate | 2010 |
| Proptimize AS | Real estate | 2022 |
| Prosess-Styring AS | Wholesale & retail | 1982 |
| Prosessarbeid AS | Health & social care | 2021 |
| Prosjektas AS | Real estate | 2015 |
| Protech AS | Wholesale & retail | 1995 |
| Protegus AS | Financial services | 2005 |
| Protex Import Johansen & Hansen Ans | | 1991 |
| Prysmian Group Norge AS | Manufacturing | 1913 |
| Prytz Hage AS | Real estate | 2016 |
| Psi Consulting AS | Information & communication | 2022 |
| PSJ Monro Helse AS | Health & social care | 2026 |
| Psykolog Vali Ahmadzadeh AS | Health & social care | 2016 |
| Psykologspesialist Bernt Langvasbråten AS | Health & social care | 2021 |
| PT Tjenester AS | Education | 2017 |
| Pte AS | Real estate | 2026 |
| Pterion Asset Management Holding AS | | 2023 |
| PTM Holding AS | | 2021 |
| Pukerud Nordre AS | Real estate | 2005 |
| Pulse Event AS | Professional & scientific | 2009 |
| Pumbamemez AS | Administrative & support | 2022 |
| Punjabi Tikka AS | Hospitality | 2020 |
| Punsj Da | Professional & scientific | 2011 |
| Purebliss AS | Education | 2023 |
| Pureppm AS | Information & communication | 2026 |
| Purko AS | Wholesale & retail | 2026 |
| Puro Stylister AS | Other services | 2008 |
| PX Solutions AS | Professional & scientific | 2007 |
| Pyksel AS | Information & communication | 2025 |
| Pyramidene Reiser AS | Administrative & support | 2015 |
| Pålbakken Holding AS | | 2023 |
| Pære Eiendom AS | Real estate | 2023 |
| Pølsesvingen AS | | 2026 |
| Q-Railing Norge - Filial Av Q-Railing Europe Holding GmbH Tyskland Nuf | Wholesale & retail | 2018 |
| Qcnzdvp AS | | 2022 |
| Quality Eiendom AS | Real estate | 2012 |
| Quality Management Software AS | Information & communication | 2001 |
| Quantify Research Norway AS | Professional & scientific | 2021 |
| Quantship AS | Professional & scientific | 2017 |
| Quantum Leap Scandinavia AS | | 2025 |
| Quatro Company AS | Real estate | 1992 |
| Queen Asia AS | Hospitality | 2022 |
| Questa Scale AS | Professional & scientific | 2022 |
| Quicktransport AS | Transport & logistics | 2026 |
| Quilteforlaget AS | Information & communication | 1998 |
| R Halstensen AS | Wholesale & retail | 1976 |
| R Hansen AS | Administrative & support | 2016 |
| R-Invest AS | Construction | 2005 |
| R.A.D. Dagligvare AS | Wholesale & retail | 2004 |
| R.K. Holding AS | Real estate | 2020 |
| R.M Handel AS | Wholesale & retail | 2014 |
| R1 Trafikkskole AS | Education | 2025 |
| Raadig AS | Information & communication | 2024 |