| Paylexia AS | Information & communication | 2026 |
| Pbergheim Holding AS | | 2019 |
| PC Juel AS | Financial services | 2005 |
| Pcverkstedet Ans | Other services | 2000 |
| PDP Holding AS | | 2026 |
| Pe-Te Invest AS | Real estate | 2005 |
| Pea Consult AS | Professional & scientific | 1993 |
| Peak Advisor AS | Professional & scientific | 2023 |
| Peak Invest AS | Wholesale & retail | 2019 |
| Peak Pursuit AS | | 2023 |
| Peanut Holding AS | Health & social care | 2025 |
| Peax AS | Financial services | 2015 |
| Pebbs AS | Administrative & support | 2026 |
| Pecordia Trading Ans | Wholesale & retail | 1999 |
| Pedagoghuset AS | Administrative & support | 2009 |
| Pedagogisk AS | Administrative & support | 2026 |
| Pedah Holding AS | | 2019 |
| Pedersen Eiendom AS | Real estate | 1978 |
| Pedersen Smie Og Sveiseverksted AS | Manufacturing | 1997 |
| Peekaboo Babyprodukter Nuf | Wholesale & retail | 2010 |
| Pegasus Invest I AS | Real estate | 2013 |
| Pegasus Invest Limited Nuf | Wholesale & retail | 2010 |
| Peikko Norge AS | Wholesale & retail | 1988 |
| Pelargos AS | Real estate | 1978 |
| Pelikan Invest AS | Real estate | 1999 |
| Pellef Invest AS | | 2021 |
| Pelsen Klipp & Stell AS | Other services | 2023 |
| Pelsperlen AS | Other services | 2026 |
| Per Christian Moen Holding AS | | 2020 |
| Per Kristensen Dagligvare AS | Wholesale & retail | 1981 |
| Per Kristensen Eiendom AS | Real estate | 1998 |
| Per SE Holding AS | Health & social care | 2023 |
| Perfekt Hus Og Hage AS | Construction | 2020 |
| Peri Norge Eiendom AS | Wholesale & retail | 2018 |
| Peridot Films AS | Information & communication | 2018 |
| Peritus Invest AS | Real estate | 2015 |
| Pers Auto AS | Other services | 2024 |
| Pers Auto Deler AS | Other services | 2006 |
| Persel AS | Construction | 2023 |
| Persona AS | Other services | 2023 |
| Perspective AS | Education | 2021 |
| Peter Bratek Strength Coach AS | Education | 2026 |
| Peter Svarstad AS | Real estate | 1960 |
| Petter Kolsrud Bjerke AS | Wholesale & retail | 2014 |
| Pettersen AS | Construction | 2005 |
| Pettersvollen 7 Eiendom AS | Real estate | 2007 |
| Petuni Invest AS | Professional & scientific | 1999 |
| PGR Holding AS | Real estate | 2009 |
| PGT AS | Administrative & support | 2024 |
| Phame AS | Professional & scientific | 2019 |
| Phan Eiendom AS | Real estate | 2026 |
| Phan Invest AS | Wholesale & retail | 2019 |
| Pharma Nord Norge AS | Wholesale & retail | 1993 |
| Pharma Partner AS | Wholesale & retail | 1993 |
| Phat Lab Music AS | Arts & recreation | 2018 |
| Phi Capital AS | | 2025 |
| Philly Bros AS | Hospitality | 2026 |
| Phones 4 You AS | Wholesale & retail | 2006 |
| Pia Seeberg AS | Health & social care | 2019 |
| Picard Holding AS | Real estate | 2021 |
| Piece of Cake AS | Professional & scientific | 2020 |
| Piece of Work Film AS | Information & communication | 2026 |
| Pigen AS | Hospitality | 1995 |
| Pihlmann Films AS | Information & communication | 2022 |
| Pikene På Broen AS | Real estate | 2003 |
| Pin High Invest AS | | 2021 |
| Pinne På Nesa AS | Arts & recreation | 2023 |
| Piovita AS | Health & social care | 2002 |
| Piql AS | Professional & scientific | 2002 |
| Pir Heistad AS | Real estate | 2017 |
| Pireus AS | Administrative & support | 2016 |
| Pitt Pott Nøtt Ans | Manufacturing | 1994 |
| Pitz AS | Administrative & support | 2017 |
| Pixeldust AS | Professional & scientific | 2019 |
| PJS AS | Real estate | 2015 |
| PKS Holding AS | Real estate | 2005 |
| Pladask AS | Professional & scientific | 2013 |
| Plank Eiendom AS | Real estate | 2025 |
| Plankompaniet AS | Professional & scientific | 1999 |
| Planlagte Tilfeldigheter AS | | 2026 |
| Plaskedammen AS | Education | 2012 |
| PLAYER5 AS | Information & communication | 2025 |
| Playing Mantis AS | Professional & scientific | 2020 |
| Plus Ultra Holding AS | | 2021 |
| Plusspluss AS | Professional & scientific | 2023 |
| Pollen Småbåtbrygge AS | Real estate | 2006 |
| Polsk & Bygg AS | Construction | 2022 |
| Polymino AS | Information & communication | 2022 |
| Ponder Stibbons Holdings AS | Financial services | 2014 |
| Poppern Holding AS | Financial services | 2008 |
| Pops Kiosk AS | Wholesale & retail | 2026 |
| Portfjell Holding AS | Administrative & support | 2005 |
| Porto BR International AS | Wholesale & retail | 2012 |
| Poseidon Bolig AS | Real estate | 2018 |
| Positivius AS | Financial services | 2005 |
| Postsvingen AS | Real estate | 2015 |
| Potentia Nos AS | Other services | 2025 |
| Power IT AS | Wholesale & retail | 2013 |
| Powercontrol AS | Manufacturing | 1996 |
| PPM Prosjekt Drammen AS | Professional & scientific | 2023 |