| Pettersen's Helsekost AS | Wholesale & retail | 2004 |
| PF Maskin AS | Construction | 2018 |
| PG. Holding AS | Wholesale & retail | 2005 |
| Phag Eiendom AS | Real estate | 2003 |
| Pharma Nordic AS | Wholesale & retail | 2022 |
| Photo Maniacs AS | Professional & scientific | 2021 |
| Pi-A Holding AS | | 2023 |
| Pia Fladmark Invest AS | | 2026 |
| Picea Bolig AS | Real estate | 2023 |
| Picea Eiendom AS | Real estate | 2023 |
| Picea Plots AS | Real estate | 2026 |
| Pickard Recovery AS | Health & social care | 2023 |
| Picterus Employee Invest AS | Financial services | 2023 |
| Piedra Holding AS | | 2023 |
| Pigment Kunsthandel AS | Wholesale & retail | 2002 |
| Pii Holding AS | | 2021 |
| Pikselsmia AS | Information & communication | 2015 |
| Pilea AS | Information & communication | 1992 |
| Pim Invest AS | Financial services | 2014 |
| Pinakkel Invest AS | | 2025 |
| Pinecliff AS | Professional & scientific | 2018 |
| Pingebingen AS | Wholesale & retail | 2026 |
| Pinxit AS | Real estate | 1998 |
| Pir Cowork AS | Real estate | 2018 |
| Pir I Eiendom AS | Real estate | 2018 |
| Pir I Invest AS | | 2018 |
| Pir II Eiendom AS | Real estate | 2021 |
| Pir II Invest AS | | 2018 |
| Pir Invest AS | | 2018 |
| Pir V Invest AS | | 2021 |
| Pir Vi Invest AS | | 2022 |
| Pir Vii Invest AS | | 2024 |
| Pir Ålesund AS | Real estate | 2018 |
| Pirion AS | Real estate | 2013 |
| Pisjon Holding AS | | 2019 |
| Piwot AS | Professional & scientific | 2020 |
| Pka Holding AS | Financial services | 2017 |
| Pla-Ma International AS | Wholesale & retail | 2009 |
| Plan B AS | Real estate | 2016 |
| Planoma Holding AS | Health & social care | 2001 |
| Planteplan AS | Information & communication | 2023 |
| Plexus Helse AS | Health & social care | 2013 |
| Plot Arkitekter AS | Professional & scientific | 2010 |
| Plug Ålesund AS | Construction | 2020 |
| Plussprodukter AS | Wholesale & retail | 2018 |
| Plussreiser AS | Administrative & support | 2006 |
| Plussreiser Holding AS | Administrative & support | 2014 |
| Pluto III AS | Hospitality | 2016 |
| PM Boliger AS | Real estate | 2018 |
| Pme AS | Agriculture & fishing | 2005 |
| Pmo Holding AS | | 2024 |
| Pmy Invest AS | Financial services | 2012 |
| Pneuma Holding AS | | 2019 |
| Point Electro AS | Construction | 2018 |
| Polar Aalesund AS | Wholesale & retail | 2007 |
| Polar Fish AS | Wholesale & retail | 2006 |
| Polarbris AS | Agriculture & fishing | 2004 |
| Polaris Distribusjon Nordvestlandet AS | Transport & logistics | 2008 |
| Polaris Trykk Ålesund AS | Manufacturing | 2008 |
| Polarsnurp AS | Agriculture & fishing | 2009 |
| Polarwrap AS | Construction | 2021 |
| Poler AS | | 2015 |
| Polyform AS | Manufacturing | 1998 |
| Polygo AS | Information & communication | 2026 |
| Polylog AS | Wholesale & retail | 2011 |
| Popcorn Invest AS | | 2020 |
| Porolon AS | Manufacturing | 1951 |
| Porolon Eiendom AS | Real estate | 2008 |
| Poseidon Frozen Eiendom AS | Real estate | 2022 |
| Positive Change International AS | Information & communication | 2019 |
| Postvegen 11 AS | Real estate | 2019 |
| Postveien 13 AS | Real estate | 2016 |
| Pourasg Media AS | Arts & recreation | 2025 |
| Pre Après AS | Wholesale & retail | 2022 |
| Preg Barnehager Ålesund AS | Education | 2022 |
| Preha AS | Health & social care | 2025 |
| Premas AS | Information & communication | 2013 |
| Premier Seafood AS | Wholesale & retail | 2012 |
| Prestegata 1 AS | Real estate | 2018 |
| Prestige Worldwide AS | Professional & scientific | 2024 |
| Pretio AS | Manufacturing | 2022 |
| Pretio Holding AS | Manufacturing | 2022 |
| Previto AS | Information & communication | 2025 |
| Pri AS | Professional & scientific | 2023 |
| Primærkontakten for Muskel & Skjelett AS | Health & social care | 2016 |
| Prisma Consult AS | Professional & scientific | 2012 |
| Privbiz AS | Information & communication | 2006 |
| Pro Blindheim AS | Hospitality | 2006 |
| Pro Breivika AS | Hospitality | 2016 |
| Pro Bumper AS | Professional & scientific | 2016 |
| Pro Klokkersundet AS | Hospitality | 2007 |
| Pro Relique AS | Professional & scientific | 2025 |
| Prochafe AS | Manufacturing | 2017 |
| Prodeco Prosjekt AS | Professional & scientific | 2001 |
| Prodex AS | Manufacturing | 2018 |
| Prodigus AS | Information & communication | 2018 |
| Proess AS | Professional & scientific | 2018 |
| Proff Montering AS | Construction | 2019 |
| Proffdata AS | Information & communication | 2017 |
| Proffma AS | Real estate | 2001 |