| Perpetuum AS | Water & waste | 2002 |
| Pesquera Ancora SL | Wholesale & retail | 2010 |
| Petersen AS | Construction | 2001 |
| Petrie-Svendsen AS | Arts & recreation | 2024 |
| Petrikke AS | Wholesale & retail | 2012 |
| Pettersen Takst & Bygg Consult AS | Real estate | 2024 |
| Pettersen Utvikling AS | Construction | 2003 |
| Petterson Og Haman Montage AB | Construction | 2000 |
| Peva Eiendom AS | Real estate | 2025 |
| Pevi AS | Professional & scientific | 2005 |
| PFV Invest AS | | 2022 |
| PGT40 AS | Real estate | 2023 |
| Pharma Holdings AS | Professional & scientific | 2016 |
| Phase Transition AS | Professional & scientific | 2022 |
| Pho Holding Tromsø AS | | 2021 |
| Physiosapiens AS | Health & social care | 2016 |
| Picasso Pizzeria & Restaurant Ans | Hospitality | 1994 |
| Pilar Entreprenør AS | Construction | 2019 |
| Pims AS | Wholesale & retail | 2011 |
| Pionernett AS | Information & communication | 2023 |
| Piper Og Ildsteder AS | Construction | 2016 |
| Pir 17 AS | Real estate | 2011 |
| Pitsa AS | Wholesale & retail | 2018 |
| Pixel Ans | Information & communication | 1995 |
| Pizza Express AS | Hospitality | 2014 |
| PJS Invest AS | | 2019 |
| PKM AS | Construction | 2014 |
| Plan & Bygg Bolig AS | Real estate | 2004 |
| Plan Og Bygg Tromsø AS | Construction | 2013 |
| Planet Remina Da | Arts & recreation | 2023 |
| Play Agency AS | Professional & scientific | 2016 |
| Plenum Eiendom AS | Real estate | 2018 |
| Plenum Tjenestedesign AS | Professional & scientific | 2020 |
| Plussplan AS | Information & communication | 2013 |
| PM Kræmer Eiendomsservice AS | Administrative & support | 2019 |
| Polar Bee AS | Hospitality | 2025 |
| Polar Byggdrift AS | Administrative & support | 2026 |
| Polar Glow AS | Administrative & support | 2024 |
| Polar Pioneer AS | Agriculture & fishing | 2009 |
| Polar Psykologtjenester AS | Health & social care | 2024 |
| Polar Safety AS | Education | 2022 |
| Polar Thermo AS | Transport & logistics | 2023 |
| Polar Viking AS | Transport & logistics | 2010 |
| Polar Wheels AS | Administrative & support | 2026 |
| Polar-Holding AS | Education | 2023 |
| Polarbjørn Holding AS | Real estate | 2023 |
| Polarcom AS | Wholesale & retail | 1994 |
| Polarfiber AS | Information & communication | 2023 |
| Polarflor AS | Wholesale & retail | 2000 |
| Polarfox AS | Information & communication | 2017 |
| Polarhagen Barnehage AS | Education | 2024 |
| Polarhavna SA | Transport & logistics | 1997 |
| Polaris Eiendom AS | Real estate | 2021 |
| Polaris Eiendom Bodø AS | Real estate | 2015 |
| Polaris Eiendom Harstad AS | | 2023 |
| Polaris Eiendom Narvik AS | Real estate | 2021 |
| Polaris Eiendomsdrift AS | Administrative & support | 2023 |
| Polaris Marked Nord AS | Professional & scientific | 2010 |
| Polaris Media Nord-Norge AS | Information & communication | 2008 |
| Polaris Midco AS | Real estate | 2021 |
| Polaris Tromsø AS | Real estate | 2021 |
| Polarservice Nord AS | Wholesale & retail | 2023 |
| Poldokk AS | Real estate | 2025 |
| Polk AS | Construction | 2013 |
| Polytech Tromsø AS | Professional & scientific | 2010 |
| Pompai AS | Information & communication | 2026 |
| Pon AS | | 2023 |
| Pongo Holding AS | | 2025 |
| Portsikring AS | Wholesale & retail | 2015 |
| Poseidon VVS AS | Construction | 2013 |
| Pottisvarri AS | | 2020 |
| Pounding That AS | Wholesale & retail | 2018 |
| Praqo AS | Information & communication | 2012 |
| PRC Bygg Og Service AS | Construction | 2026 |
| Premiumbad Tromsø AS | Wholesale & retail | 2005 |
| Premiumutleie AS | Wholesale & retail | 2012 |
| Presis Bolig AS | Real estate | 2019 |
| Prestvannet Studentbarnehage AS | Education | 2022 |
| Pro Lash Academy AS | Other services | 2020 |
| Pro Webshop Ltd Nuf | Wholesale & retail | 2022 |
| Proderma Tromsø AS | Health & social care | 2024 |
| Proff Bilpleie Tromsø AS | Other services | 2013 |
| Profile Bygg AS | Construction | 2013 |
| Profio AS | Professional & scientific | 2003 |
| Profugo AS | Information & communication | 2025 |
| Progusan AS | Professional & scientific | 2005 |
| Proofstory AS | Information & communication | 2026 |
| Property North AS | Real estate | 2024 |
| Prophylix AS | Manufacturing | 2017 |
| Prophylix Pharma Holding AS | Manufacturing | 2017 |
| Protero AS | Wholesale & retail | 2024 |
| Protromsø AS | Professional & scientific | 2021 |
| Provekst AS | Professional & scientific | 2002 |
| Provenia AS | | 2005 |
| Psst! Psst! AS | Wholesale & retail | 2011 |
| Psykolog Anita Johansen AS | Health & social care | 2019 |
| Psykolog Anne Grete Andersen AS | Health & social care | 2019 |
| Psykolog Ellen D. Martinsen AS | Health & social care | 2023 |
| Psykologene AS | Health & social care | 2012 |
| Psykologspesialist E. M. Growen AS | Health & social care | 2022 |