| Torvet Tannklinikk AS | Narvik | 2025 |
| Tos Asvo AS | Tolga | 1992 |
| Tosuna Invest AS | Tennevoll | 2005 |
| Total Fysio AS | Vikhammer | 2023 |
| Total Helse AS | Bodø | 2012 |
| Total Helseservice AS | Oslo | 2005 |
| Total Kropp AS | Nesttun | 2015 |
| Total Kropp Fana AS | Nesttun | 2012 |
| Total Kropp Sandsli AS | Sandsli | 2012 |
| Total Omsorg | Oslo | 2020 |
| Total Recovery AS | Lillestrøm | 2026 |
| Total Rehab AS | Oslo | 2022 |
| Totalmassasje AS | Alta | 2026 |
| Toten Fysioterapi AS | Raufoss | 2022 |
| Toten Naprapatklinikk AS | Raufoss | 2020 |
| Tou Helsepark AS | Stavanger | 2024 |
| Tov Røysland Ønh AS | Gjøvik | 2012 |
| Traasdahl Holding AS | Bodø | 2005 |
| Traba AS | Trondheim | 2020 |
| Training of Life AS | Røros | 1996 |
| Tran Medical AS | Steinberg | 2024 |
| Tranby Legesenter Da | Tranby | 2006 |
| Tranby Tannlegesenter AS | Tranby | 2017 |
| Trangsrud Medical AS | Hamar | 2020 |
| Transcendens AS | Oslo | 2023 |
| Trapes Kiropraktorklinikk AS | Skien | 2019 |
| Trator AS | Oslo | 2014 |
| Traumebevisst Omsorg AS | Os | 2018 |
| Traumeinformert Samfunn AS | Mjøndalen | 2024 |
| Traumepsykologen AS | Larvik | 2023 |
| Traveldoktor AS | Sandefjord | 2014 |
| Traveling Beauty Nurse AS | Arendal | 2024 |
| Tre for En AS | Risør | 2019 |
| Treat Health AS | Kristiansand S | 2024 |
| Tredaltunet AS | Lindesnes | 2022 |
| Trekanten Legesenter Asker AS | Asker | 2020 |
| Trekanten Legesenter Da | Kristiansand S | 2004 |
| Treklossen AS | Trondheim | 2025 |
| Trellevika Fysioterapi AS | Flekkefjord | 2019 |
| Tremek AS | Vestnes | 1995 |
| Trenco Eiendom AS | Grimstad | 1998 |
| Trengereid Psykologpraksis AS | Hetlevik | 2020 |
| Trening Er Medisin AS | Kragerø | 2013 |
| Trening Og Helse AS | Rolvsøy | 2013 |
| Trening, Helse Og Velvære AS | Sørumsand | 2016 |
| Treningsklinikken AS | Trondheim | 2023 |
| Treningskompis Da | Tromsø | 2024 |
| Treningspartneren AS | Hafrsfjord | 2021 |
| Treningsverksted Ba | Mo I Rana | 1989 |
| Tresse Legesenter AS | Kristiansand S | 2018 |
| Tretten Tannlegesenter AS | Tretten | 2020 |
| Tri-O AS | Oslo | 2009 |
| Triaden Tannklinikk AS | Lørenskog | 2013 |
| Trident Healthcare AS | Søreidgrend | 2025 |
| Trigger Jobb AS | Florvåg | 1990 |
| Trigo Tech AS | Elverum | 2018 |
| Trikanten Tannmakeri AS | Verdal | 2025 |
| Trimar Holding AS | Drøbak | 2025 |
| Trimmen Fysioterapi & Trening AS | Eidsvoll | 2010 |
| Trimveien Legesenter AS | Horten | 2015 |
| Trine Dahlmo AS | Mo I Rana | 2019 |
| Trine Dahlmo-Klinikken AS | Mo I Rana | 2023 |
| Trine Elverum AS | Tolvsrød | 2020 |
| Trine Merete Fritsvold Psykomotorisk Fysioterapi AS | Ottestad | 2015 |
| Trine Thornquist AS | Sandnes | 1999 |
| Trinehjelpen AS | Oslo | 2020 |
| Trinvestor AS | Arnatveit | 2021 |
| Trio Holmedal AS | Bærums Verk | 2019 |
| Trisus AS | Oslo | 2021 |
| Triumf Helse AS | Paradis | 1899 |
| Triv AS | Steinkjer | 2002 |
| Triv Kompetanse AS | Steinkjer | 2017 |
| Triva Familierådgivning Ans | Oslo | 1996 |
| Trivsel Fysio- Og Manuellterapi Da | Slemmestad | 2023 |
| Tro Omsorg AS | Vettre | 2020 |
| Trobe Invest AS | Oslo | 2006 |
| Troi AS | Haugesund | 2006 |
| Troll Medic AS | Oslo | 2016 |
| Trolldalen Bistand AS | Kråkerøy | 2016 |
| Trolle Care AS | Oslo | 2025 |
| Trollheim Arbeid & Inkludering AS | Surnadal | 2019 |
| Trollheim AS | Surnadal | 2007 |
| Trollheim Kurs Og Kompetanse AS | Surnadal | 2019 |
| Trollheimen Omsorg AS | Rindal | 2026 |
| Trolltind Legekontor AS | Manger | 2016 |
| Trollvika AS | Kvernaland | 2019 |
| Trollåsen Fysioterapi AS | Trollåsen | 2020 |
| Trollåsen Legesenter AS | Trollåsen | 2018 |
| Trollåsen Legeservice AS | Kolbotn | 2008 |
| Trommå Spesialistleveranser AS | Kristiansund N | 2021 |
| Troms Logopedtjeneste AS | Tromsø | 2019 |
| Tromsdalen Legesenter Da | Tromsdalen | 2024 |
| Tromsø Fysioterapi AS | Tromsø | 2015 |
| Tromsø Kiropraktikk & Helse AS | Oslo | 2019 |
| Tromsø Kiropraktikksenter AS | Tromsø | 2013 |
| Tromsø Osteopati AS | Tromsø | 2024 |
| Tromsø Psykologtjeneste AS | Tromsø | 2025 |
| Tromsø Spesialistlegedrift Da | Tromsø | 2007 |
| Tromsø Tannkirurgi Og Narkosesenter AS | Tromsø | 2018 |
| Tromsø Tannlegesenter AS | Tromsø | 2020 |