| Tak Og Blikk Service AS | Construction | 2021 |
| Taking Care of Business Oljetransport AS | Transport & logistics | 2002 |
| Takstarena Innlandet AS | Professional & scientific | 2020 |
| Tannlege Steindebakken AS | Health & social care | 2008 |
| Taxi Rune Andersen AS | Transport & logistics | 2025 |
| Taxisentralen Brumunddalen AS | Transport & logistics | 1980 |
| TCD Holding AS | Real estate | 2015 |
| Team Trans Ans | Transport & logistics | 1989 |
| Tec 1 AS | Construction | 2024 |
| Tec Holding AS | Real estate | 2017 |
| Tekkteam Lillehammer AS | | 2026 |
| Teknobingo Brumunddal AS | Arts & recreation | 2010 |
| Tentipi Norge AS | Wholesale & retail | 2009 |
| Teras Eiendom AS | Real estate | 2019 |
| Termoco AS | Construction | 1992 |
| The Point AS | Real estate | 2018 |
| Thermal Tec AS | Professional & scientific | 2013 |
| Thomas Øvergaard AS | Financial services | 2013 |
| Thore's Trafikkskole AS | Education | 2011 |
| Thorstad Mat AS | Wholesale & retail | 2022 |
| Thøge Invest AS | Financial services | 2005 |
| Tilde Holding AS | Real estate | 2021 |
| Tine Grønvold Invest AS | | 2024 |
| Tiurveien 24 AS | Real estate | 1996 |
| Tjernø Holding AS | Financial services | 2012 |
| TK Performance AS | Manufacturing | 2026 |
| TKH Norge Da | Education | 2022 |
| TM Bil AS | Wholesale & retail | 2020 |
| To Min Holding AS | Administrative & support | 2021 |
| To-K Forvaltning AS | | 2021 |
| Tojajo Holding AS | | 2025 |
| Tommy Krokengen AS | | 2026 |
| Tommy Linnerud Holding AS | | 2024 |
| Tomtebanken AS | Real estate | 2016 |
| Tore Granmo Holding AS | Construction | 2020 |
| Tore H Amdahl AS | Real estate | 2005 |
| Tore H Amdahl Eiendom AS | Real estate | 1982 |
| Torsæter Eiendom Da | Real estate | 2005 |
| Torsæter Samdrift Da | Agriculture & fishing | 2006 |
| Toscana Brumunddal AS | Hospitality | 2022 |
| Total Consulting AS | Wholesale & retail | 1990 |
| Touring Campers AS | Administrative & support | 2024 |
| Tradisjonshåndverk Og Byggteknikk AS | Professional & scientific | 2018 |
| Trafikk Gjengen AS | Transport & logistics | 2021 |
| Traktorutstyr AS | Wholesale & retail | 2025 |
| Trampe-Kindt Holding AS | | 2020 |
| Treehouse of Norway AS | Construction | 2020 |
| Treogtjue Holding AS | | 2025 |
| Tretopphyttene AS | Hospitality | 2009 |
| Trewi AS | Professional & scientific | 1988 |
| Trill Rundt AS | Other services | 2011 |
| Trinto Eiendom AS | Real estate | 2013 |
| Trinto Gruppen AS | Real estate | 1985 |
| Trollingadventure AS | Arts & recreation | 2003 |
| Truls Krokengen AS | | 2026 |
| Trym Company AS | Construction | 2003 |
| TS Kleven Holding AS | | 2023 |
| TTJ AS | Manufacturing | 2005 |
| Tunet Barnehage AS | Education | 2015 |
| Tunstua Garn&Søm Og Gardsutsalg AS | Wholesale & retail | 2025 |
| Turid's Pub AS | Hospitality | 2018 |
| Tømrer Brække AS | Construction | 2025 |
| Tørud/Bratengen Eiendom Da | Real estate | 2009 |
| Ubr AS | Professional & scientific | 2013 |
| Ue Andersen AS | Administrative & support | 2021 |
| Ugelbugel AS | Professional & scientific | 2010 |
| Ukb AS | Real estate | 2015 |
| Ultimax Holding AS | Wholesale & retail | 2016 |
| Utleiebolig Elverum AS | Real estate | 2021 |
| Utleiebolig Lillehammer AS | Real estate | 2021 |
| Vaag Byrå AS | Professional & scientific | 2020 |
| Vangen Takst AS | Real estate | 2024 |
| Vanor AS | Wholesale & retail | 2009 |
| Veldre Barnehage SA | Education | 1991 |
| Veldre Sentrum Holding AS | | 2024 |
| Veldre Viltområde SA | Other services | 1953 |
| Veldresagtunet Ans | Hospitality | 2019 |
| Veldroms Venner SA | Real estate | 1983 |
| Verdi Reklame AS | Manufacturing | 2007 |
| Vestbygda Holding AS | Hospitality | 2010 |
| Vi Bor Godt AS | Professional & scientific | 2021 |
| Vi Eiendom AS | Real estate | 2016 |
| Vi Horisont AS | Real estate | 2022 |
| Vi Utvikling AS | Real estate | 2019 |
| Vic Vekst Partner AS | | 2004 |
| Vico Invest AS | | 2026 |
| Viken Equity AS | Information & communication | 2018 |
| Viken Estate AS | Real estate | 2017 |
| Viken Evolve AS | | 2020 |
| Viken Invest Holding AS | Real estate | 2019 |
| Viken Services AS | Professional & scientific | 2014 |
| Vilmer AS | Health & social care | 2016 |
| Vinn Eiendom AS | Real estate | 2021 |
| Vire AS | Real estate | 2024 |
| Visergutten AS | Real estate | 2004 |
| Vitec HK Data AS | Information & communication | 1992 |
| Viul AS | Real estate | 2023 |
| Vivianns Mote AS | Wholesale & retail | 2002 |
| Volengens Vedutsalg AS | Agriculture & fishing | 2023 |
| Vollengen Transport AS | Transport & logistics | 2025 |