| Aal Mote AS | Wholesale & retail | 1989 |
| Aal the Best AS | Wholesale & retail | 2025 |
| Actif Sportell AS | Hospitality | 2023 |
| Actif Sportell Limited Nuf | Hospitality | 2011 |
| Advokatene I Hallingdal AS | Professional & scientific | 2021 |
| Afaa Holding AS | | 2023 |
| Agio AS | Real estate | 2007 |
| Aktho Holding AS | | 2024 |
| Alkit Utleie AS | Administrative & support | 2022 |
| Alliance Optikk Ål AS | Wholesale & retail | 2026 |
| Andres Holding AS | | 2025 |
| Ans Bergogården | Real estate | 1988 |
| Arctic Coating AS | Wholesale & retail | 2019 |
| Arkitekthagen AS | Professional & scientific | 2016 |
| Arnegard Holding AS | Financial services | 2005 |
| Aroma Kafe Pizza & Grill AS | Hospitality | 2022 |
| Asha Eigedom AS | Real estate | 2005 |
| Auka Eiendom AS | Real estate | 2021 |
| Ausand AS | Professional & scientific | 2007 |
| Averøy Fritidseiendom Da | Real estate | 2011 |
| B&G Braaten Og Granberg | Administrative & support | 2018 |
| B. Asplund Anleggservice AS | Construction | 2026 |
| Badekarer Da | Arts & recreation | 2025 |
| Balder Pub Og Pizza Ans | Hospitality | 1996 |
| BD Sjemmedal AS | Construction | 2015 |
| Bedriftskonsulenten Hallingdal AS | Professional & scientific | 2025 |
| Bergaplass AS | Real estate | 2008 |
| Bergbygget AS | Real estate | 2019 |
| Bergrosa AS | Real estate | 2024 |
| Bergrosa Holding AS | Real estate | 2024 |
| Bergsjøområdet SA | Professional & scientific | 2007 |
| Bergsjøstølen AS | Hospitality | 1992 |
| Bergsland AS | Real estate | 2005 |
| Bergstølhovda Hyttegrend AS | Real estate | 2020 |
| BG Bygg Og Baderom AS | Construction | 2023 |
| BG Utvikling AS | Real estate | 2024 |
| BGX AS | Information & communication | 2023 |
| Bjella Og Medgard AS | Construction | 2010 |
| Bjørn Ruud AS | Financial services | 2005 |
| Bjørn Tveito AS | Construction | 2011 |
| Blomsterpikene Hallingdal Hage Og Blomster AS | Wholesale & retail | 2013 |
| BMV Invest AS | Real estate | 2015 |
| Bosset Steinstøl Vegen | Construction | 1978 |
| Braaten Utvikling AS | Real estate | 2025 |
| Brann & Byggsikkerhet Hallingdal AS | Wholesale & retail | 2023 |
| Breablikk AS | Real estate | 2006 |
| Browse AS | Information & communication | 2005 |
| Brye AS | | 2026 |
| Brye Holding AS | | 2026 |
| Brødrene Martinsens Hotelldrift Da | Hospitality | 1995 |
| BT Haugen AS | Construction | 2020 |
| Buseth Data AS | Information & communication | 2016 |
| Bygg Og Hytteservice Hallingdal AS | Construction | 2025 |
| Bygg Og Renovering M-Socha AS | Construction | 2021 |
| Byggjardskogen Ans | Agriculture & fishing | 1997 |
| Byggverket Hallingdal AS | Real estate | 1997 |
| Bæren Gudmund Og Møller Turid Ans | Agriculture & fishing | 1987 |
| Bøken Holding AS | | 2023 |
| Cairn Holding AS | Manufacturing | 2025 |
| Capitalek AS | | 2020 |
| CIC Operations Hallingdal AS | Hospitality | 2018 |
| Conmodum AS | Construction | 2018 |
| Connecting Brands AS | Professional & scientific | 2025 |
| Coreskills AS | Education | 2025 |
| D.P.Stec Holding AS | | 2024 |
| Dalseide Septikservice AS | Water & waste | 2007 |
| Delmas AS | Construction | 2023 |
| Dengerud Holding AS | | 2024 |
| Dihamm AS | Manufacturing | 2016 |
| Din Helsevekt AS | Health & social care | 2024 |
| Dokk Hyttetjenester Da | Administrative & support | 2019 |
| Dominik Patryk Stec AS | Construction | 2012 |
| Dybedahl Invest AS | | 2025 |
| Dybedahl IT - Service AS | Information & communication | 2013 |
| Dybedahl Telekommunikasjon AS | Professional & scientific | 2026 |
| Ebcon Advansia AS | Professional & scientific | 2017 |
| Egs Entreprenør AS | Wholesale & retail | 2009 |
| Eht Elektro Og Håndverkstjenester AS | Construction | 2008 |
| Eiendomsplaneten AS | Wholesale & retail | 2011 |
| Eilev Sørbøen AS | Construction | 2017 |
| El-Installatøren AS | Construction | 2018 |
| Elektroservice Hallingdal Installasjon AS | Construction | 1999 |
| Ellingsgard Ans | Agriculture & fishing | 1995 |
| Erlend Apneseth Trio Da | Arts & recreation | 2019 |
| Espegard AS | Wholesale & retail | 1994 |
| Espegard Capital AS | Real estate | 2024 |
| Etterlid AS | Real estate | 1984 |
| Etterlid Invest AS | Real estate | 2005 |
| Evjen Motor AS | Arts & recreation | 2016 |
| Filmprodusentane AS | Information & communication | 2007 |
| Fixit 24 AS | Construction | 2014 |
| Fjell Naturlig AS | Other services | 2025 |
| Fjellberg Holding AS | | 2022 |
| Fjellborg AS | Real estate | 2015 |
| Fjellbygg Ål AS | Real estate | 2005 |
| Fjellgran Da | Wholesale & retail | 2004 |
| Fjordren AS | Administrative & support | 2025 |
| Fjukle Holding AS | Manufacturing | 2022 |
| Flid Håndverk AS | Real estate | 2023 |
| Forest Restaurant AS | Hospitality | 2022 |