| PK Maskinservice AS | Construction | 2026 |
| Plassen Utbygging AS | Real estate | 2025 |
| Plusscare AS | Administrative & support | 2025 |
| PM Holding Alta AS | | 2018 |
| PNN AS | Professional & scientific | 2020 |
| Polar Engineering AS | Professional & scientific | 2026 |
| Polarbris Alta AS | Construction | 2015 |
| Polargymalta AS | Arts & recreation | 2023 |
| Polaris Eiendom Alta AS | Real estate | 1986 |
| Polaris Trykk Alta AS | Manufacturing | 2012 |
| Polarlys Utbygging AS | Real estate | 2008 |
| Polyfemos AS | Manufacturing | 2024 |
| Portrett AS | Professional & scientific | 2023 |
| Power Innovation AS | Financial services | 2017 |
| Power Solutions Invest AS | Construction | 2017 |
| Power Solutions Mmo AS | Construction | 2013 |
| Pp-Ikt AS | Information & communication | 2022 |
| Praktisk Verksted AS | Information & communication | 2009 |
| Prebo Eiendom AS | Real estate | 2025 |
| Prebo Holding AS | Administrative & support | 2019 |
| Primewing AS | Wholesale & retail | 2026 |
| Pritex AS | Administrative & support | 2018 |
| Pritex Kapital AS | | 2025 |
| Pritex Team AS | Wholesale & retail | 2014 |
| Pritex Toys AS | Wholesale & retail | 2011 |
| Pro Tek AS | Administrative & support | 2023 |
| Promulti AS | Manufacturing | 2025 |
| Prosjektfokus 12 AS | Real estate | 2024 |
| Protan Takservice AS | Construction | 1996 |
| Psykolog Helge Kaspersen AS | Health & social care | 2014 |
| Psykologspesialist Cecilie Abelsen Grønnevik AS | Health & social care | 2019 |
| Psykologspesialist Vibeke Mathisen AS | Health & social care | 2016 |
| Psykomotorisk Fysioterapi Alta AS | Health & social care | 2021 |
| Puskas Musikk AS | Wholesale & retail | 2001 |
| PVJ Trafikkskole Alta AS | Education | 2002 |
| PVP Holding AS | Real estate | 2018 |
| På Bohr'Et AS | Hospitality | 2025 |
| Pæska Skiferproduksjon AS | Mining & quarrying | 2002 |
| R E Suhr Invest AS | Financial services | 2005 |
| R Hammari Holding AS | Financial services | 2007 |
| R Hermansen Holding AS | Construction | 2017 |
| R Jørgensen AS | Information & communication | 2018 |
| R S Eiendom AS | Construction | 2006 |
| R. Henriksen Holding AS | Construction | 2025 |
| R. Moe Holding AS | | 2019 |
| R. Olsen AS | Health & social care | 2017 |
| R19 Eiendom AS | Real estate | 2022 |
| R19 Holding AS | Real estate | 2022 |
| Ra Holding Alta AS | Real estate | 2007 |
| Ra Holding Skillemo AS | Real estate | 2023 |
| Raipas Holding AS | | 2022 |
| Raipas Utleie AS | Real estate | 2022 |
| Ramle AS | Administrative & support | 2022 |
| Ratama Holding AS | Construction | 2022 |
| RDH Invest AS | Financial services | 2017 |
| Re-Eiendom AS | Real estate | 2006 |
| Reakli AS | Professional & scientific | 2026 |
| Realnet AS | Professional & scientific | 1986 |
| Reginiussen Helse AS | Health & social care | 2005 |
| Reginiussen Holding AS | | 2022 |
| Regn Med Oss AS | Professional & scientific | 2024 |
| Regnskap Og Rådgivning Alta AS | Professional & scientific | 2013 |
| Regnskapservice Alta AS | Professional & scientific | 1998 |
| Reno-Invest AS | Water & waste | 1983 |
| Reshocks AS | Other services | 2023 |
| Resico AS | Health & social care | 2023 |
| Resq IT AS | Information & communication | 2026 |
| Rgberg Holding AS | | 2022 |
| RGC Capital AS | | 2026 |
| RGP Holding AS | Real estate | 2021 |
| Rib Inord AS | Professional & scientific | 2008 |
| Richard JR AS | Agriculture & fishing | 2022 |
| Rigelmap AS | Wholesale & retail | 2025 |
| Rik Holding AS | Real estate | 2015 |
| Ringveien 29 AS | Real estate | 2022 |
| Ringveien Invest AS | | 2005 |
| Rishaugen Barnehage SA | Education | 1989 |
| Rishaugen Holding AS | | 2025 |
| Rivarbukt AS | | 2018 |
| River Protection AS | Manufacturing | 2020 |
| Rmob Holding AS | Construction | 2020 |
| Rnova AS | Professional & scientific | 2025 |
| RNS Bygg AS | Construction | 2009 |
| Roald Johansen Ingeniørforretning AS | Construction | 1991 |
| Roald Johansen Invest AS | Real estate | 2005 |
| Roald Og Marianne Alseth Ans | Wholesale & retail | 1988 |
| Roan Holding Alta AS | | 2025 |
| Robol Alta AS | | 2022 |
| Robol Holding AS | | 2022 |
| Rodahl Dental AS | Health & social care | 2026 |
| Rofra Holding AS | Hospitality | 2019 |
| Roland Oskarsson AS | Professional & scientific | 2000 |
| Rolf Persen AS | Wholesale & retail | 2007 |
| Ronga Invest AS | Real estate | 2018 |
| Ronny Hermansen AS | Construction | 2022 |
| Roulettn Ans | | 1992 |
| Rox Maskin AS | Construction | 2019 |
| Roy-Yngve Thomassen AS | Construction | 2006 |
| Royal Crab Alta AS | Hospitality | 2026 |
| RT Eiendom Alta AS | Real estate | 2024 |