| Aboks AS | Professional & scientific | 2024 |
| Alfo AS | Wholesale & retail | 1995 |
| Amromh AS | | 2021 |
| Annes Gullsmed Og Gavebutikk Da | Wholesale & retail | 1987 |
| Arnfinn Olsen AS | Construction | 2010 |
| Asv Investments AS | Real estate | 2021 |
| Autosentrum AS | Other services | 2008 |
| Becohit AS | Professional & scientific | 2022 |
| Beherske AS | Professional & scientific | 2022 |
| Bjerka Invest AS | | 2023 |
| Boutique Helene AS | Wholesale & retail | 1983 |
| Brand Eiendom AS | Real estate | 2024 |
| Byggevarehuset Fillan AS | Wholesale & retail | 2019 |
| Chavida Dagligvarer AS | Wholesale & retail | 2026 |
| Ditt Velvære AS | Health & social care | 2021 |
| Eignarhaldsfelag AS | Real estate | 2021 |
| Elektro Team AS | Construction | 1996 |
| Elektrohuset Hitra AS | Wholesale & retail | 2019 |
| Eliff AS | Hospitality | 2020 |
| Elvemo Og Hjertås Bygg AS | Construction | 1995 |
| F Bygg AS | Construction | 2024 |
| Fillan Eiendom AS | Real estate | 2018 |
| Fillan Jernvare AS | Wholesale & retail | 2023 |
| Fillvågen AS | Real estate | 2020 |
| Fraspark Reklame AS | Real estate | 2023 |
| Gammelsætra AS | Real estate | 2009 |
| Gaula Holding AS | Wholesale & retail | 2019 |
| Glørstad Holding AS | | 2011 |
| Harald S Lian Transport AS | Transport & logistics | 2016 |
| Hausse Invest AS | | 2011 |
| Hestnes Eiendom AS | Hospitality | 1991 |
| Historiefortelleren Da | Information & communication | 2010 |
| Hitra Bergverk AS | Mining & quarrying | 1989 |
| Hitra Bo-Tilbud AS | Real estate | 1976 |
| Hitra Bygg AS | Construction | 2005 |
| Hitra Frøya Lokalavis AS | Information & communication | 1974 |
| Hitra Frøya Smådyrklinikk AS | Professional & scientific | 2021 |
| Hitra Fysioterapi AS | Health & social care | 2006 |
| Hitra Holding AS | Financial services | 2016 |
| Hitra Taxisentral AS | Transport & logistics | 2024 |
| Hitra Taxisentral Da | Transport & logistics | 2006 |
| Hitra Utbyggingsselskap AS | Real estate | 1998 |
| Hitra Utleie AS | Administrative & support | 2025 |
| Hitrahallen SA | Arts & recreation | 1989 |
| Hitras Krydderi AS | Manufacturing | 2025 |
| Hjorten Hotell Hitra AS | Hospitality | 2015 |
| Hjorten Kjøpesenter AS | Real estate | 2002 |
| Hse Holding AS | Real estate | 2019 |
| HSP Teknikk AS | Construction | 2017 |
| HT Service AS | Administrative & support | 2012 |
| Htek Rørservice AS | Construction | 2025 |
| Hvitsand Eiendom AS | Real estate | 2012 |
| Hårfokus AS | Other services | 2012 |
| Ing. Jens Mortensvik AS | Professional & scientific | 2024 |
| Inmed AS | Health & social care | 2018 |
| Innsia Helhetsterapi AS | Health & social care | 2018 |
| Intermat AS | Wholesale & retail | 2015 |
| Jan Stene AS | Construction | 1987 |
| Ji Johnsen Holding AS | | 2022 |
| JKS Boligutleie AS | Real estate | 2025 |
| JKS Eiendom AS | Real estate | 2022 |
| JKS Utvikling AS | Real estate | 2025 |
| K D Sæther Eiendom AS | Real estate | 1992 |
| K4 Vikan AS | Real estate | 2015 |
| Kama Eiendom AS | Real estate | 2002 |
| Karlsen & Sønn AS | Wholesale & retail | 2005 |
| Kathar Consulting AS | Professional & scientific | 2026 |
| Katrima AS | Real estate | 2006 |
| Kevin Solbakken AS | Wholesale & retail | 2025 |
| Ki Investeringsselskap AS | Wholesale & retail | 2018 |
| KK Areal AS | Real estate | 2019 |
| KK. Holding AS | Real estate | 2025 |
| Knarren AS | Real estate | 2012 |
| Knarrlagsund Eiendomsdrift AS | Real estate | 2011 |
| Kok Delikatesser AS | Wholesale & retail | 2014 |
| Kriher Eiendom AS | Real estate | 2016 |
| Kristial AS | Wholesale & retail | 2005 |
| Kyst Media AS | Wholesale & retail | 1992 |
| Kystplan AS | Professional & scientific | 2007 |
| Lege Arne Selmer AS | Health & social care | 2020 |
| Leirvågveien 2 AS | Other services | 2013 |
| Letnes Kystfiske AS | Agriculture & fishing | 2026 |
| LKN Holding AS | | 2020 |
| Lotus Klinikk AS | Health & social care | 2012 |
| Lynglia AS | Wholesale & retail | 2005 |
| Mediahuset Fillan AS | Real estate | 2008 |
| Miss Cava AS | | 2021 |
| Mnts AS | Professional & scientific | 2023 |
| Møbelhuset Hitra AS | Wholesale & retail | 1994 |
| Narbut AS | Manufacturing | 2022 |
| Narci Spiseri AS | Hospitality | 2025 |
| Noev Holding AS | | 2026 |
| Nordrøm Service AS | Administrative & support | 2025 |
| Norway Events AS | Administrative & support | 2022 |
| Odontovet AS | Professional & scientific | 2009 |
| Oldervik AS | Agriculture & fishing | 2023 |
| Ole Haugen AS | Professional & scientific | 1996 |
| Ole Kristoffersen AS | Real estate | 2018 |
| Owlsound AS | Information & communication | 2024 |
| Pikene På Torget AS | Manufacturing | 2010 |