| Invest I Fosen AS | Professional & scientific | 2013 |
| J Rathe Transport AS | Transport & logistics | 2021 |
| Janusz Invest AS | | 2021 |
| Jbo Utleie AS | Real estate | 2021 |
| JD Holding AS | Real estate | 2014 |
| Jelegutt Invest AS | | 2021 |
| Jomar Skånøy AS | Transport & logistics | 1998 |
| JW Eiendom AS | Real estate | 2015 |
| K Solem Holding AS | | 2023 |
| Kawe Holding AS | Real estate | 2015 |
| Koren Optikk AS | Wholesale & retail | 2007 |
| KSK Optikk AS | | 2020 |
| Kuben Kjøpesenter AS | Real estate | 1996 |
| Kuri Eiendom AS | Real estate | 2024 |
| KW Bygg AS | Construction | 2012 |
| Kåken Limited Nuf | | 2009 |
| Langeland Invest & Utleie AS | Real estate | 2025 |
| Langsand Eiendom Da | Real estate | 2005 |
| LC Produktion AS | Construction | 2020 |
| LC Produktion Holding AS | Construction | 2019 |
| Leikvang Holding AS | | 2007 |
| Leira Bil AS | Wholesale & retail | 1993 |
| Leira Invest AS | Wholesale & retail | 2024 |
| Leiraveien 4 AS | Real estate | 2018 |
| Lg-Bygg AS | Construction | 2011 |
| Lg-Eiendom AS | Real estate | 2018 |
| Lg-Holding AS | Construction | 2017 |
| Lg-Invest AS | | 2026 |
| Lien-Invest AS | | 2020 |
| Lovelihome AS | Wholesale & retail | 2024 |
| Lys Holding & Utleie AS | | 2024 |
| Malerglede AS | Wholesale & retail | 2000 |
| Marissa AS | Professional & scientific | 2021 |
| Melins Lamm AB | Wholesale & retail | 2015 |
| Meyano AS | Wholesale & retail | 2025 |
| Midtre Skaugdal Samdrift Da | Agriculture & fishing | 2009 |
| Min Sko AS | Wholesale & retail | 2015 |
| Minibolig AS | Real estate | 2025 |
| Moslet Invest AS | | 2026 |
| Moslet Retail AS | Wholesale & retail | 2026 |
| MR Motesenteret Rissa AS | Wholesale & retail | 2025 |
| Møbel-Service AS | Construction | 2019 |
| Naf-Samdrift Da | Agriculture & fishing | 2012 |
| Naglen AS | Real estate | 2014 |
| Napoli Rissa AS | Hospitality | 2022 |
| Neptunia Media AS | Information & communication | 2023 |
| Nordic Ship Design AS | Professional & scientific | 2024 |
| Norheim Senter AS | Real estate | 2007 |
| Nuas Technology AS | Professional & scientific | 2015 |
| Nyheim Eiendomsutvikling AS | Real estate | 2004 |
| P. Bakøy Invest AS | Construction | 2008 |
| Pallin AS | Construction | 1988 |
| Patron Invest AS | Real estate | 2018 |
| Petter Bakøy AS | Construction | 2008 |
| Petter Bakøy Holding AS | Construction | 2008 |
| Petterhavna AS | Arts & recreation | 2026 |
| Prosess Branding AS | Manufacturing | 2019 |
| Prosess Eiendom AS | Real estate | 2024 |
| Reddy AS | Wholesale & retail | 2008 |
| Reinshaugen Panorama AS | Real estate | 2018 |
| Rhodium Nordic AS | Health & social care | 2026 |
| Rissa Arena AS | Real estate | 2016 |
| Rissa Betong AS | Manufacturing | 2009 |
| Rissa Eiendom AS | Real estate | 2007 |
| Rissa Elektromarked AS | Wholesale & retail | 2002 |
| Rissa Frisørteam AS | Other services | 1987 |
| Rissa Fysioterapi Da | Health & social care | 1998 |
| Rissa Hestesportsenter AS | Agriculture & fishing | 2016 |
| Rissa Industribygg AS | Real estate | 1987 |
| Rissa Industriservice AS | Real estate | 1993 |
| Rissa Kolonihage AS | Real estate | 2014 |
| Rissa Kraftlag SA | Energy | 1948 |
| Rissa Maskinservice AS | Manufacturing | 2017 |
| Rissa Og Leksvik Begravelsesbyrå AS | Other services | 1990 |
| Rissa Radio SA | Information & communication | 1992 |
| Rissa Samdrift Da | Agriculture & fishing | 2003 |
| Rissa Sentrumsbygg AS | Real estate | 2023 |
| Rissa Taxi Sentral Da | Transport & logistics | 1999 |
| Rissa Vannverk SA | Water & waste | 1959 |
| Rissabolig Holding AS | | 2023 |
| Rissahallen SA | Arts & recreation | 1995 |
| Rissamartnan AS | Arts & recreation | 2015 |
| Rissasenteret Eiendom AS | Real estate | 2002 |
| RK Eiendom Årnsetveien 1 AS | Real estate | 2025 |
| RK Elektro AS | Construction | 2024 |
| RK Energi Og Fiber AS | Energy | 2025 |
| RK Fibernett AS | Information & communication | 2025 |
| RK Fremtid AS | | 2025 |
| RK Produksjon AS | Energy | 2025 |
| RK Service AS | Professional & scientific | 2009 |
| Rokseth Holding AS | Construction | 2021 |
| RR Snekkerservice AS | Construction | 2018 |
| Rådhusveien 20 AS | Wholesale & retail | 2007 |
| Saltnes Utleie AS | Administrative & support | 2023 |
| Samo Invest AS | Manufacturing | 2008 |
| Sand Bygg AS | Construction | 1997 |
| Sand Bygg Eiendom AS | Construction | 2015 |
| Sandmo Lock Stock & Two Smoking Barrels AS | Professional & scientific | 2021 |
| Saxa Hårdesign AS | Other services | 2006 |
| Scanmarinegroup of Norway AS | Manufacturing | 2001 |