| Peak Arkitekter AS | Professional & scientific | 2019 |
| Peak Services AS | Administrative & support | 2019 |
| Peakshair Norge AS | Wholesale & retail | 2014 |
| Pearl Properties AS | Real estate | 2021 |
| Pebeno Eiendom AS | Construction | 2012 |
| Pebeno Holding AS | Real estate | 2013 |
| Pebin AS | Professional & scientific | 2014 |
| Peco Holding AS | Construction | 2005 |
| Pedagogisk Innhold AS | Education | 2023 |
| Peder Falcks Veg 3 Eiendom AS | Real estate | 2020 |
| Peder Kynnø AS | Manufacturing | 2012 |
| Peder Morsets Veg 4 AS | Real estate | 2017 |
| Pegusa AS | Professional & scientific | 2024 |
| Pekrila Invest AS | Real estate | 2014 |
| Pelican Invest AS | Real estate | 1999 |
| Pelle Conelli AS | Financial services | 2005 |
| Peloton Norway AS | Information & communication | 2000 |
| Pendula AS | | 2008 |
| Peninsula Invest AS | Financial services | 2016 |
| Pennie Invest AS | | 2020 |
| Pennock Mur & Håndverk AS | Construction | 2025 |
| Pennypacker Capital AS | | 2025 |
| Penpoint AS | Arts & recreation | 2026 |
| Pensjonat Jarlen AS | Real estate | 1992 |
| Pensjonat Jarlen Drift AS | Hospitality | 2009 |
| Peolb AS | Health & social care | 2022 |
| Peopleuknow AS | Information & communication | 2018 |
| Per a Lystad AS | Transport & logistics | 1994 |
| Per FR Anderssen Invest AS | Real estate | 1992 |
| Per Gunnar Kjeldsberg Holding AS | | 2025 |
| Per Gunnar Kjeldsberg Invest AS | | 2025 |
| Per Kristian Sætherskar Holding AS | Financial services | 2014 |
| Per Steinar Moen AS | Professional & scientific | 2016 |
| Per Stene Eiendom AS | Real estate | 2019 |
| Per T. Lykke AS | Transport & logistics | 1995 |
| Peraco AS | Real estate | 2008 |
| Percus AS | Arts & recreation | 2022 |
| Perello AS | Financial services | 2015 |
| Pergus AS | Professional & scientific | 2019 |
| Periodontia AS | Health & social care | 2025 |
| Periodontia Holding AS | | 2025 |
| Perlen Holding AS | Wholesale & retail | 2018 |
| Perlitti Bygg AS | Construction | 2018 |
| Permanent Beauty AS | Other services | 2017 |
| Pernille Døsvik Holding AS | Professional & scientific | 2025 |
| Pernille Invest AS | Real estate | 2019 |
| Perpetual AS | Professional & scientific | 2014 |
| Pers Invest AS | Wholesale & retail | 2005 |
| Persa AS | Financial services | 2005 |
| Persaunet Bolig AS | Real estate | 2016 |
| Persaunet Bygg 6 AS | Real estate | 2007 |
| Persaunet Hårsenter AS | Other services | 2008 |
| Persaunet Legesenter AS | Health & social care | 2006 |
| Persaunet Matsenter AS | Wholesale & retail | 2001 |
| Persille Invest AS | | 2020 |
| Persisk Teppegalleri AS | Wholesale & retail | 1988 |
| Pertek AS | Professional & scientific | 2016 |
| Peter Singstad AS | Financial services | 2005 |
| Petit Concept Da | Professional & scientific | 2005 |
| Petlink AS | Information & communication | 2023 |
| Peto Eiendom Trondheim AS | Real estate | 2007 |
| Petrell A/S | Professional & scientific | 1988 |
| Petricore Norway AS | Professional & scientific | 2017 |
| Petro Teach AS | Professional & scientific | 2021 |
| Petrojarl I L.L.C. Nuf | Mining & quarrying | 2021 |
| Petrojarl I Production AS | Mining & quarrying | 2011 |
| Petroleum Geo-Technology AS | Mining & quarrying | 2013 |
| Petrotrax AS | Professional & scientific | 2012 |
| Petter Dass Kapital Da | Arts & recreation | 2020 |
| Petter Høyem Schevig Holding AS | | 2026 |
| Petter Krogstad Holding AS | | 2015 |
| Petter Olberg AS | Health & social care | 2023 |
| Pettersen & Co, Kolonial Og Fetevarer AS | Wholesale & retail | 2021 |
| Peva Holding AS | | 2021 |
| Pfa Invest AS | | 2023 |
| PH Forvaltning AS | Real estate | 2023 |
| PHB Maskin AS | Construction | 2023 |
| Phoenix Gastropub AS | Hospitality | 2023 |
| Pholio AS | Information & communication | 2020 |
| Phoneit AS | Information & communication | 2025 |
| Phonereparatøren AS | Other services | 2025 |
| Phonereparatøren Drift AS | Other services | 2025 |
| Phu Yen AS | Hospitality | 2009 |
| Physior AS | Health & social care | 2021 |
| Pia Marlene Øye Holding AS | | 2023 |
| Pias Invest AS | Wholesale & retail | 1998 |
| Pick Your Day AS | Information & communication | 2015 |
| Picterus AS | Professional & scientific | 2015 |
| Picterus Newborn Health AS | Health & social care | 2025 |
| Pictus AS | Professional & scientific | 1998 |
| Pigghå Eiendomsutvikling AS | Real estate | 2019 |
| Pigment AS | Other services | 2020 |
| Pilan AS | | 2015 |
| Pilar Management AS | Real estate | 2012 |
| Pilaris Subsea AS | Professional & scientific | 2007 |
| Pilco AS | Professional & scientific | 2007 |
| Pilea Invest AS | Professional & scientific | 2022 |
| Pilgrimbooking.Com AS | Information & communication | 2026 |
| Pineapple Invest AS | | 2023 |
| Pineberg Eiendom AS | | 2003 |