| PHL Invest AS | Transport & logistics | 2005 |
| Preg Barnehager Heimly AS | Education | 2022 |
| Prometus AS | Real estate | 2006 |
| Prosjekt Og Utvikling AS | Professional & scientific | 2024 |
| Prosjekt Og Utvikling Holding AS | Professional & scientific | 2024 |
| Prosjekthjelp AS | Professional & scientific | 2012 |
| Psykolog Hanne Renland AS | Health & social care | 2012 |
| Pushhead Holding AS | | 2026 |
| R&R Crewing AS | Administrative & support | 2025 |
| R-A Maskin AS | Administrative & support | 2017 |
| R-P Invest AS | Financial services | 2014 |
| R.B.I. AS | Administrative & support | 2014 |
| R86 Dekksenter AS | Wholesale & retail | 2005 |
| Radio Midt-Troms AS | Information & communication | 1987 |
| Ragnar Andersens Sønner AS | Real estate | 2001 |
| Rasmussen Investment AS | Transport & logistics | 2023 |
| Rasmussen Sjåførutleie AS | Transport & logistics | 2023 |
| Recovery Vest AS | Health & social care | 2021 |
| Ref AS | Real estate | 2021 |
| Refa Brygge AS | Real estate | 2007 |
| Regnskap I Nor Midt-Troms AS | Professional & scientific | 2023 |
| Regnskap Senja AS | Professional & scientific | 2023 |
| Regnskapsførar'N AS | Professional & scientific | 2019 |
| Reinelv Skogsvei AS | Real estate | 2021 |
| Remingle AS | Information & communication | 2025 |
| Resultatinvest AS | Professional & scientific | 2000 |
| Resultatutvikling AS | Professional & scientific | 1997 |
| Retail Finnsnes AS | Wholesale & retail | 2022 |
| RF G2 25 AS | Wholesale & retail | 2019 |
| Ringveien 10 Eiendom AS | Real estate | 2019 |
| Ringveien Finnsnes AS | Real estate | 2009 |
| Ro Fiske AS | Agriculture & fishing | 2023 |
| Rovitec AS | Administrative & support | 2025 |
| RS Designstudio AS | Professional & scientific | 2019 |
| Rthp Invest AS | Real estate | 2005 |
| Rune Eios AS | Transport & logistics | 2022 |
| Runi Holding AS | | 2019 |
| Rå Biopark AS | Energy | 2022 |
| Rådhuskvartalet Finnsnes AS | Real estate | 2011 |
| Rørhuset AS | Real estate | 1986 |
| Rørsystem AS | Construction | 2004 |
| Sabine Holding AS | | 2026 |
| Salong Cheri AS | Other services | 2011 |
| Salong Fantasi AS | Other services | 1995 |
| Sandbakk Begravelseshjelp AS | Other services | 2006 |
| Sandvik Byggservice AS | Real estate | 2013 |
| Scandina AS | Professional & scientific | 2017 |
| Schwenke & Richardsen AS | Construction | 2019 |
| SCS Holding AS | | 2026 |
| Second Skin Tattoo AS | Other services | 2020 |
| Seil Og Mesan AS | Manufacturing | 2013 |
| Seja Holding AS | Financial services | 2018 |
| Senh Eiendom AS | Real estate | 2025 |
| Senja Avfall Miljø AS | Water & waste | 2013 |
| Senja Avfall Næring AS | Water & waste | 2005 |
| Senja Caravan AS | Other services | 1972 |
| Senja Dagligvarer AS | Wholesale & retail | 2024 |
| Senja Drift & Service AS | Administrative & support | 2026 |
| Senja Elektro & Automation AS | Construction | 2018 |
| Senja Event Og Utvikling AS | Arts & recreation | 2018 |
| Senja Experience AS | Administrative & support | 2018 |
| Senja Fairytales AS | Real estate | 2020 |
| Senja Forum AS | Administrative & support | 2019 |
| Senja Fysioterapi AS | Health & social care | 2024 |
| Senja Galleri Og Rammeverksted AS | Manufacturing | 2020 |
| Senja Havn AS | Real estate | 2017 |
| Senja Havn Eiendom AS | Construction | 2022 |
| Senja Hotell AS | Hospitality | 1998 |
| Senja Hotell Eiendom AS | Real estate | 2025 |
| Senja Lab AS | Professional & scientific | 2021 |
| Senja Outdoor AS | Wholesale & retail | 2012 |
| Senja Outdoor Equipment AS | Wholesale & retail | 2020 |
| Senja Samdriftskontor AS | Professional & scientific | 1994 |
| Senja Sport AS | Other services | 2017 |
| Senja Tour and Adventures AS | Transport & logistics | 2019 |
| Senja Tours AS | Transport & logistics | 2004 |
| Senja Uteliv AS | Hospitality | 2021 |
| Senja Varmepumpe Service AS | Construction | 2024 |
| Senja Øyehelse AS | Health & social care | 2023 |
| Senjafangst AS | Professional & scientific | 2020 |
| Senjafryd AS | Wholesale & retail | 2023 |
| Senjaguttene AS | Hospitality | 2026 |
| Senjautvikling AS | Professional & scientific | 2019 |
| Senjen Holding AS | Real estate | 2019 |
| Sentrum Eiendom Tromsø AS | Real estate | 2010 |
| Sentrum Trafikk Skole AS | Education | 2008 |
| Sentrumseiendommene AS | Real estate | 2009 |
| Servicesenteret Finnsnes AS | Other services | 2006 |
| Shake That AS | Hospitality | 2019 |
| Shalipi Norge Nuf | Other services | 2024 |
| Siam Street Kitchen AS | Hospitality | 2025 |
| Sifero AS | Professional & scientific | 2008 |
| Sirius AS | Financial services | 2001 |
| Siv Furøy Design AS | Professional & scientific | 2024 |
| Sjao AS | Agriculture & fishing | 2021 |
| SJR Holding AS | | 2019 |
| Sjødrefs AS | Agriculture & fishing | 2025 |
| Sjømatklyngen Senja AS | Professional & scientific | 2017 |
| Skansen Hotell AS | Real estate | 2006 |
| Skaugvoll Gård Da | Agriculture & fishing | 2003 |