| Pindsle Holding AS | | 2017 |
| Pindsle Næring AS | Real estate | 2006 |
| Pindsle Stadion AS | Arts & recreation | 2006 |
| Pindsleveien 1B AS | Real estate | 2007 |
| Pindsleveien 1C AS | Real estate | 2014 |
| Pindsleveien 2A AS | Real estate | 2019 |
| Pinstripe Analytics AS | Information & communication | 2018 |
| Pip Invest AS | Construction | 1988 |
| Pipebrød AS | Manufacturing | 2015 |
| Pizza Eiendom AS | Real estate | 2014 |
| Pk-Ved AS | Manufacturing | 2023 |
| Placepoint AS | Information & communication | 2018 |
| Plan a AS | Professional & scientific | 2013 |
| Playsafe Group AS | Information & communication | 2017 |
| Playsafe Norway AS | Information & communication | 2002 |
| Playtek AS | Construction | 2018 |
| Pleieleie AS | Wholesale & retail | 2019 |
| Pluto Kapital AS | | 2025 |
| PM Sandefjord AS | Real estate | 2006 |
| PM Utvikling AS | Professional & scientific | 2019 |
| PMH Eiendom AS | Real estate | 2020 |
| PMH Elektro AS | Construction | 2017 |
| PMH Ventilasjon AS | Construction | 2025 |
| Pnordberg Holding AS | | 2025 |
| POCITO Tone-Lise Johannessen og Per Chr Petersen ANS | Wholesale & retail | 1990 |
| Point AS | Professional & scientific | 2007 |
| Polar Miljø AS | Wholesale & retail | 2011 |
| Polibil AS | Other services | 2017 |
| Pollen Eiendom AS | Real estate | 2022 |
| Polly Invest AS | Manufacturing | 2008 |
| Polop Invest AS | Real estate | 2005 |
| Polydisplay AS | Manufacturing | 1991 |
| Polymester AS | Professional & scientific | 2026 |
| Pomimo AS | | 2025 |
| Porfyr Invest AS | Financial services | 2021 |
| Positiv Prosess AS | Professional & scientific | 2009 |
| Power Energy Consulting AS | Professional & scientific | 2025 |
| Power Plant Norge Da | Wholesale & retail | 2003 |
| Power-Energy AS | Professional & scientific | 2025 |
| Powerfleet Norge AS | Information & communication | 2012 |
| Pragmaton AS | Professional & scientific | 1995 |
| Predator Ans | Education | 1991 |
| Prego Holding AS | | 2022 |
| Preoday AS | Information & communication | 2015 |
| Prestegårdsveien 2 AS | Construction | 2017 |
| Prestekragen Barnehage AS | Education | 2014 |
| Prestige Sport AS | Wholesale & retail | 2022 |
| Prima Deli Sandefjord AS | Wholesale & retail | 2025 |
| Primatoscana AS | Hospitality | 2012 |
| Primesome AS | | 2021 |
| Primesome Consulting AS | Information & communication | 2018 |
| Primesome Eiendom AS | Real estate | 2018 |
| Primesome Holding AS | Professional & scientific | 2018 |
| Primoris AS | Wholesale & retail | 2014 |
| Privatomsorgen AS | Health & social care | 2011 |
| Pro Bono AS | Professional & scientific | 1998 |
| Pro Casa AS | Real estate | 2008 |
| Pro Gym Vallø AS | Arts & recreation | 2008 |
| Pro-Sound AS | Real estate | 2005 |
| Proactive Lead AS | Professional & scientific | 2023 |
| Proalu Dører & Vinduer AS | Construction | 2026 |
| Production Technology Solutions AS | Professional & scientific | 2016 |
| Profax AS | Wholesale & retail | 1989 |
| Profesjonell Service AS | Administrative & support | 2019 |
| Proff Flis Sandefjord AS | Construction | 2019 |
| Proffaid Norge AS | Education | 2022 |
| Profftech AS | Wholesale & retail | 2011 |
| Profiks Rental AS | Administrative & support | 2022 |
| Progress Tjenester AS | Real estate | 2001 |
| Project Management Consulting AS | Professional & scientific | 2014 |
| Promed Pharma Norge AS | Wholesale & retail | 2008 |
| Prona Hudklinikk AS | Other services | 2025 |
| Propcare AS | Administrative & support | 2026 |
| Proqode AS | Information & communication | 2019 |
| Proshopen.Golf AS | Wholesale & retail | 2022 |
| Prosjekt Consult AS | Professional & scientific | 2026 |
| Prosjektteam AS | Professional & scientific | 1995 |
| Prospect Finder AS | Information & communication | 2023 |
| Prosper Vision AS | Agriculture & fishing | 2016 |
| Protech Consult AS | Professional & scientific | 2015 |
| Protid AS | Administrative & support | 1998 |
| Protid Urmaker Næss AS | Wholesale & retail | 2007 |
| Prozeed AS | Information & communication | 2008 |
| Prytania Invest AS | | 2021 |
| Psykolog Amel Cehajic AS | Health & social care | 2025 |
| Ptns Invest AS | | 2020 |
| Puji Sandefjord AS | Hospitality | 2020 |
| Pukkestadveien 18 AS | Real estate | 2007 |
| Pukkestadveien 36 AS | Real estate | 1986 |
| Pukkestadveien 36 Holding AS | Real estate | 2007 |
| Puls Sandefjord AS | Arts & recreation | 2010 |
| Pure Salmon Technology AS | Professional & scientific | 2021 |
| Pure Salmon Technology Holding AS | Professional & scientific | 2021 |
| Peligran A/S | Real estate | 1977 |
| Pål Nordrum Holding AS | | 2024 |
| Pølsenilsen AS | Real estate | 2017 |
| Q-Brands AS | Wholesale & retail | 2011 |
| Quercus Invest AS | | 2023 |
| Quickanalyzes AS | Information & communication | 2026 |
| Quinsgaard AS | Professional & scientific | 2012 |