| Innherred Takst AS | Real estate | 2023 |
| Innherred Tomteselskap AS | Real estate | 2019 |
| Innherred Trafikkskole AS | Education | 2024 |
| Innherreds Folkeblad Og Verdalingen AS | Information & communication | 1994 |
| Innherredsbakeriet AS | Manufacturing | 2001 |
| Innlandet Boliger AS | Real estate | 2022 |
| Intakt Bilskade Verdal AS | Other services | 2005 |
| Integraf AS | Professional & scientific | 2022 |
| Interiørsenteret Trøndelag AS | Wholesale & retail | 1999 |
| Intersport Verdal AS | Wholesale & retail | 2002 |
| Intrinsic AS | Education | 2020 |
| Intrinsic Aspire AS | Professional & scientific | 2024 |
| J-Byggvakt AS | Administrative & support | 2024 |
| J. Aune Holding AS | Real estate | 2005 |
| Ja Austad Invest AS | Other services | 2024 |
| Jagro AS | Financial services | 2006 |
| Jamas Fiskeutstyr AS | Wholesale & retail | 2021 |
| Jegerbrødre AS | Agriculture & fishing | 2019 |
| Jiro Eiendom AS | Real estate | 2011 |
| JJ Offshore Consulting AS | Administrative & support | 2025 |
| JK Byggteknikk AS | Construction | 2014 |
| JKT Eiendom AS | Real estate | 2012 |
| JNL AS | Construction | 2023 |
| Joli Invest AS | Financial services | 2005 |
| Jom Holding AS | Financial services | 2014 |
| Jon by Holding AS | | 2026 |
| Jon Lennart Invest AS | Construction | 2005 |
| Jse Eiendom AS | | 2017 |
| Juberg Invest AS | | 2021 |
| Junus AS | | 2023 |
| Jøbe Eiendom AS | Real estate | 2019 |
| K S Eiendom AS | Real estate | 2011 |
| K. Nessø Eiendom AS | Real estate | 2023 |
| KAFFE1 AS | Wholesale & retail | 2008 |
| Kalkkaia AS | Transport & logistics | 2017 |
| Karin Invest AS | | 2005 |
| Kathrines Minde AS | Real estate | 2007 |
| Kattehotellet Innherred AS | Other services | 2014 |
| Keepitup-Norge Ans | Wholesale & retail | 2005 |
| Kenneth Sem Taxi AS | Transport & logistics | 2024 |
| Kews Holding AS | Real estate | 2017 |
| Kine Steinkjer AS | Wholesale & retail | 2024 |
| Kiosken AS | Wholesale & retail | 2012 |
| Kjemifabrikken AS | Manufacturing | 2015 |
| Kjpre 379 Holding AS | | 2023 |
| Kjæran Lager AS | Construction | 2026 |
| Kjærlighetsstien Utvikling AS | Real estate | 2016 |
| Klondyke Maskinlag SA | Agriculture & fishing | 1995 |
| KM Eggen Holding AS | | 2021 |
| Knut Arne Jørstad AS | Transport & logistics | 1981 |
| Kokv Holding AS | Financial services | 2013 |
| Komet Holding AS | Administrative & support | 2004 |
| Komplett Prosjektering AS | Professional & scientific | 2012 |
| Kreik Invest AS | Health & social care | 2009 |
| Kristiansen Eiendom Og Invest AS | Real estate | 2022 |
| KRM Holding AS | | 2025 |
| Krua Thai AS | Hospitality | 2020 |
| Kubikk Eiendom AS | Real estate | 2020 |
| Kubikk Ventilasjon AS | Construction | 2017 |
| Kulstad Invest AS | Wholesale & retail | 2011 |
| Kulstad Maskin AS | Wholesale & retail | 2011 |
| Kultar AS | Arts & recreation | 2008 |
| KV Rent AS | | 2022 |
| KV4 Utvikling AS | Real estate | 2005 |
| Kvernmo AS | Construction | 2001 |
| Kvernmo Eiendom Holding AS | Real estate | 2013 |
| Kvilt Kran Og Logistikk AS | Administrative & support | 2021 |
| Kåbo AS | Financial services | 2005 |
| Kålen Betongsaging AS | Construction | 1998 |
| Kåstad Invest AS | Manufacturing | 2007 |
| Lafopa AS | Manufacturing | 2023 |
| Lafopa Eiendom AS | Real estate | 1980 |
| Lafopa Industrier AS | Manufacturing | 1987 |
| Laftekledning AS | Manufacturing | 2005 |
| Lag Byggtjenester AS | Construction | 2023 |
| Lag Entreprenør AS | Construction | 2004 |
| Lag Gruppen AS | Construction | 2023 |
| Lag Utleie AS | Administrative & support | 2017 |
| Lago Holding AS | Financial services | 2005 |
| Lakmyhr AS | Real estate | 2012 |
| Langnes Og Bakkan Blikkenslagerforretning AS | Construction | 1987 |
| Langstrand Elektro AS | Professional & scientific | 2022 |
| Laost Holding AS | Financial services | 2016 |
| Lars Kristian Holding AS | | 2020 |
| Lars S. Grindberg Og Guro W. Laksholm Da | Agriculture & fishing | 2007 |
| Lauv Studio AS | Manufacturing | 2024 |
| Lauvdal Service AS | Other services | 2019 |
| LB Eiendom A/S | Real estate | 1978 |
| Le Bakken AS | Real estate | 2010 |
| Lefsebua Da | Manufacturing | 2001 |
| Lein Import Ans | | 1989 |
| Leirsjø Vasslag SA | Water & waste | 1962 |
| Leirådal Maskinlag SA | Agriculture & fishing | 1998 |
| Lekekroken AS | Real estate | 2023 |
| Lekeland Ans | Wholesale & retail | 1985 |
| Leklemåsen Varmebasseng AS | Real estate | 2009 |
| Leksdal Fjellbeitelag SA | Agriculture & fishing | 1995 |
| Leksdal Grunneierlag SA | Real estate | 1960 |
| Leksdal Montessoriskole SA | Education | 2022 |
| Leksdal Nye Barnehage SA | Education | 2026 |