| Pro Oculus AS | Oslo | 2020 |
| Pro-Lux AS | Kongsberg | 2022 |
| Proactiva Holding AS | Son | 2010 |
| Proactive Consult AS | Fjellhamar | 2021 |
| Proadepto AS | Karasjok | 2019 |
| Proaktiv HMS Aksjeselskap | Lundenes | 2023 |
| Proam and Co AS | Son | 2025 |
| Procare Holding AS | Narvik | 2021 |
| Procare. AS | Narvik | 2012 |
| Procerus AS | Oslo | 2020 |
| Proderma Scandinavia AS | Lillestrøm | 2020 |
| Proderma Tromsø AS | Tromsø | 2024 |
| Prohedian AS | Asker | 2021 |
| Promedicus AS | Rælingen | 2011 |
| Promedicus Drift AS | Lillestrøm | 2021 |
| Promenaden Kongsvinger AS | Kongsvinger | 1991 |
| Prometheus Medical International AS | Stavanger | 2024 |
| Promiteam AS | Vestby | 2018 |
| Prosessarbeid AS | Drammen | 2021 |
| Prosjekt Løvetann Da | Borgenhaugen | 2003 |
| Prosperis AS | Kolbotn | 2026 |
| Protese Consult AS | Trondheim | 2021 |
| Provento Partners AS | Nøtterøy | 2024 |
| Providor AS | Brumunddal | 1994 |
| PS Consulting AS | Nøtterøy | 2013 |
| Psi-Gruppen AS | Halden | 2011 |
| PSJ Monro Helse AS | Drammen | 2026 |
| PSR Helsetjenester AS | Ottestad | 2021 |
| Psychocare AS | Bruvoll | 2024 |
| Psychologica AS | Fagernes | 2021 |
| Psychotrauma Therapy & Counselling AS | Jessheim | 2021 |
| Psyflex AS | Oslo | 2019 |
| Psyke & Soma AS | Hvalstad | 2024 |
| Psyke AS | Spillum | 2019 |
| Psykehuset AS | Oslo | 2023 |
| Psykia AS | Billingstad | 2006 |
| Psykia Drift AS | Billingstad | 2019 |
| Psykiater Andreas G Kjerstad AS | Bergen | 2021 |
| Psykiater Bla AS | Drøbak | 2017 |
| Psykiater Britt Børven AS | Jessheim | 2016 |
| Psykiater C.G Søgaard AS | Lørenskog | 2013 |
| Psykiater Christian Hjort AS | Oslo | 2012 |
| Psykiater Dace Sortland Psykoterapipraksis AS | Oslo | 2019 |
| Psykiater Dag Oulie AS | Bergen | 2003 |
| Psykiater Einar Formo Hermansen AS | Arendal | 2026 |
| Psykiater Elena Soroka AS | Strømmen | 2024 |
| Psykiater Hamann AS | Oslo | 2024 |
| Psykiater Haugerud AS | Son | 2012 |
| Psykiater Heidi Husby AS | Risør | 2019 |
| Psykiater Johannes Skaar AS | Rennesøy | 2021 |
| Psykiater Kirsten Westlye AS | Sandnes | 2006 |
| Psykiater Knut Martinsen Holding AS | Rolvsøy | 2025 |
| Psykiater Osmani Sandvika AS | Sandvika | 2015 |
| Psykiater Philip Nissen AS | Arendal | 2026 |
| Psykiater Shaygani AS | Lillestrøm | 2010 |
| Psykiater Signe K. Dørheim AS | Hafrsfjord | 2021 |
| Psykiater Simona Hansen AS | Haslum | 2025 |
| Psykiater Therese Bigseth AS | Asker | 2026 |
| Psykiater.No AS | Ski | 2025 |
| Psykiateren AS | Bodø | 2025 |
| Psykiatriklinikken AS | Risør | 2014 |
| Psykiatripartner AS | Skien | 2020 |
| Psykiatrispesialisten Nazari AS | Oslo | 2018 |
| Psykiatrispesialisten, Leif Olsen AS | Oslo | 2017 |
| Psykiatritjenester AS | Risør | 2009 |
| Psykisk Helse AS | Larvik | 2026 |
| Psykiskbra AS | Rakkestad | 2025 |
| Psykiskbra Holding AS | Rakkestad | 2025 |
| Psykolog Agnete Nodland AS | Stavanger | 2017 |
| Psykolog Amel Cehajic AS | Sandefjord | 2025 |
| Psykolog Anita Johansen AS | Tromsø | 2019 |
| Psykolog Anne Grete Andersen AS | Tromsø | 2019 |
| Psykolog Anne Kathrine Øvreberg AS | Oslo | 2015 |
| Psykolog Anne Lise Mjølsnes AS | Sandnes | 2005 |
| Psykolog Anny Beate Myge Kvale AS | Haugesund | 2019 |
| Psykolog Arne Blindheim Nuf | Bergen | 2010 |
| Psykolog Arne Brathagen AS | Tønsberg | 2019 |
| Psykolog Astrid Nygård AS | Bodø | 2022 |
| Psykolog Barbro Andersen AS | Oslo | 2019 |
| Psykolog Berge AS | Sandvika | 2024 |
| Psykolog Birgit Valla AS | Hamar | 2025 |
| Psykolog Bjørnar Bråthen AS | Vikersund | 2007 |
| Psykolog Brian Østrup AS | Fredrikstad | 2022 |
| Psykolog Brit Røisli AS | Stavanger | 2020 |
| Psykolog Britt Wenche Pedersen AS | Oslo | 2014 |
| Psykolog Bård Lyster AS | Molde | 2026 |
| Psykolog Carl Fredrik Gamst AS | Harstad | 2003 |
| Psykolog Christina Schacht-Magnussen | Dk-8000 Aarhus C | 2015 |
| Psykolog Christine Lien AS | Bergen | 2020 |
| Psykolog Dag Holte AS | Stavanger | 2017 |
| Psykolog Dag Vilsvik AS | Bergen | 2012 |
| Psykolog Dan Tungland AS | Stavanger | 2022 |
| Psykolog Eline Lie Hæreid AS | Tønsberg | 2023 |
| Psykolog Ellen D. Martinsen AS | Tromsø | 2023 |
| Psykolog Elwira Magdalena Fiecko AS | Oslo | 2021 |
| Psykolog Ermesjø AS | Ski | 2017 |
| Psykolog Grethe Økland Lillebråten AS | Haugesund | 2024 |
| Psykolog Gro Beate Drege AS | Trondheim | 2013 |
| Psykolog Haaland AS | Kristiansand S | 2024 |
| Psykolog Hanne Renland AS | Finnsnes | 2012 |