| Tsreppen AS | Øyestranda | 2021 |
| TSW Byggeråd Og Arkitektur AS | Stavsjø | 2021 |
| Ttak AS | Oslo | 2026 |
| Tubus Barnehage AS | Sarpsborg | 2022 |
| Tuft Kompetanse AS | Nyborg | 2024 |
| Tuft Transportskole AS | Nyborg | 2024 |
| Tukuy AS | Oslo | 2022 |
| Tullas Hage AS | Dalsgrenda | 2015 |
| Tullut Invest AS | Otta | 2023 |
| Tumlebo Barnehage SA | Stokmarknes | 1989 |
| Tundra Tours AS | Namsskogan | 2021 |
| Tuneskipet Barnehage SA | Yven | 1989 |
| Tunet Barnehage AS | Brumunddal | 2015 |
| Tunet Familiebarnehage Ans | Skien | 1999 |
| Tung Trafikk Da | Hovdebygda | 2025 |
| Tungbil Utdanning AS | Blomsterdalen | 2017 |
| Tungbilskolen AS | Drammen | 1986 |
| Tungtrø Barnehage AS | Stadsbygd | 2011 |
| Tuning in to Kids Europe AS | Granli | 2019 |
| Tunsberg Medisinske Skole AS | Tønsberg | 2008 |
| Tuntland Holding AS | Oslo | 2017 |
| Tunåsen Barnehage AS | Hornindal | 2012 |
| Turi Sletners Barnehave AS | Oslo | 2005 |
| Turmat Og Villevekster AS | Hommersåk | 2022 |
| Turun Yliopisto Nuf | Fi-20014 Turun Yliopisto | 2026 |
| Turøy Hansen AS | Kristiansand S | 2024 |
| Tusenbein Barnehage SA | Mo I Rana | 1989 |
| Tusenfryd Barnehage Stranda SA | Stranda | 1995 |
| Tusseladden Friluftsbarnehage SA | Kvaløysletta | 1980 |
| Tussemyra Familiebarnehage Da | Trondheim | 2005 |
| Tussestua Familiebarnehage AS | Klæbu | 2005 |
| Tussilago Barnehage AS | Ørje | 2022 |
| Tussilago Barnehage Stjørdal AS | Stjørdal | 2022 |
| Tut & Kjør Trafikkskole AS | Jessheim | 2011 |
| Tuttiby AS | Flekkerøy | 2026 |
| Tvedestrand Dans Trening & Trivsel Da | Tvedestrand | 2003 |
| Tveitevannet Barnehage SA | Bergen | 1987 |
| Tveitevoll Fitness AS | Arendal | 2026 |
| Tvekamp AS | Ingeberg | 2025 |
| Tverlandet Montessoriskole SA | Sundøya | 2022 |
| Tveter Sports Consult AS | Rygge | 2026 |
| Tveterhytta Barnehage AS | Sarpsborg | 2022 |
| Tveterjordet Fus Barnehage AS | Haslum | 2015 |
| Tyholttunet Barnehage SA | Trondheim | 2023 |
| Tykkåsen Barnehage AS | Fevik | 2003 |
| Tyn Deg AS | Kristiansand S | 2024 |
| Tynn Symfoni AS | Valnesfjord | 2023 |
| Tynset Grafikkverksted Da | Tynset | 2015 |
| Typisk Janne AS | Jørpeland | 2024 |
| Tyrihans Barnehage SA | Greåker | 1991 |
| Tyristubben Fus Barnehage AS | Gjesåsen | 2018 |
| Tyse Fus Barnehage AS | Stord | 2019 |
| Tyssedal Montessoriskole SA | Tyssedal | 2016 |
| Tytingen Gards- Og Naturbarnehage AS | Vågå | 2007 |
| Tyttebæret Barnehage SA | Spydeberg | 2002 |
| Thomtes Trafikkskole A/S | Gjøvik | 1982 |
| Tågvollan Barnehage AS | Oppdal | 2022 |
| Tårnsvalen AS | Oslo | 1995 |
| Tåsen Skoles Barnehage SA | Oslo | 1978 |
| Tøffe Barnehage SA | Stabekk | 1989 |
| Tønsberg Bibelskole AS | Tønsberg | 2015 |
| Tønsberg Og Nøtterøy Trafikkskole Da | Nøtterøy | 1991 |
| Tønsberg Yoga AS | Tønsberg | 2009 |
| Tønsbergkirkenes Barnehager AS | Tønsberg | 2006 |
| Tørdal Montessoriskule AS | Tørdal | 2026 |
| Tørkopp Fus Barnehage AS | Kråkerøy | 2018 |
| Tøyenåsen Barnehage SA | Hakadal | 1991 |
| U-Turn Trafikkskole AS | Kristiansund N | 2022 |
| Uab Questum Training Nuf | Lt-03163 Vilnius | 2026 |
| Uanzett Da | Åkrehamn | 2002 |
| Udland Eiendom BHG AS | Haugesund | 2005 |
| Udland Fus Barnehage AS | Haugesund | 2018 |
| Udnes Naturbarnehage AS | Hvam | 2015 |
| Ufilm AS | Oslo | 2020 |
| Ufo Eiendom AS | Kristiansand S | 2002 |
| Ugeskemarevolutionen | Dk-3500 Værløse | 2014 |
| Ullern Barnehage SA | Skarnes | 1993 |
| Ullern Trafikkskole AS | Oslo | 2012 |
| Ulna AS | Nordkisa | 2008 |
| Ulna Colores Barnehage AS | Oslo | 2022 |
| Ulsnes Barnehage SA | Hundvåg | 1994 |
| Ultralydhåndboken AS | Nesttun | 2025 |
| Ulvestad Barneskule AS | Lauvstad | 2012 |
| Ulvestua Barnehage SA | Oslo | 1995 |
| Ulvøya Barnehage AS | Oslo | 2015 |
| Umni AS | Oslo | 2020 |
| Unanimes AS | Oslo | 2020 |
| Unbinding Life AS | Gardvik | 2025 |
| Undervisningshuset AS | Oslo | 2011 |
| Undervisningsservice AS | Bardufoss | 1992 |
| Undring AS | Jar | 2021 |
| Ung Mestring AS | Hasselvika | 2022 |
| Unicode AS | Kristiansand S | 2024 |
| Unicorn Pole Studio AS | Oslo | 2016 |
| Unicorns and Lions AS | Asker | 2023 |
| Unigeo AS | Bjørndalstræ | 2007 |
| Unik MC Skole AS | Brattvåg | 2012 |
| Unikum Aktiv AS | Oslo | 2020 |
| Uniq Invest AS | Trondheim | 2020 |
| Uniq Studiesenter AS | Hammerfest | 2024 |