| Trident Salmon Star II AS | Molde | 1999 |
| Trident Unity AS | Oslo | 2023 |
| Triff AS | Loddefjord | 2024 |
| Trifæm AS | Lesjaskog | 2023 |
| Trilby AS | Nesttun | 2005 |
| Trio Express Da | Oslo | 2006 |
| Trio Logistikk AS | Ski | 2023 |
| Trio Spedisjon AS | Ålesund | 2023 |
| Trios Da | Bryne | 2021 |
| Tripper AS | Førde | 2021 |
| Trithorn Bulk Norway Nuf | Fornebu | 2016 |
| Trito Holding AS | Kristiansand S | 2006 |
| Troll Boks AS | Skedsmokorset | 2017 |
| Troll Investor AS | Ulsteinvik | 2001 |
| Troll X AS | Fjerdingby | 2024 |
| Trollerud Transport AS | Trøgstad | 2016 |
| Trollheimen Taxi AS | Rennebu | 2020 |
| Trollheimen Turbuss AS | Oppdal | 2014 |
| Trollheimsexpressen AS | Surnadal | 2001 |
| Trollpikken SA | Egersund | 2018 |
| Trolltek AS | Skåla | 2019 |
| Trolltoget AS | Øvre Eidfjord | 1991 |
| Trolltunga-Road Bus AS | Odda | 2018 |
| Troms Fryseterminal AS | Tromsdalen | 1997 |
| Troms Losseservice AS | Tromsø | 2000 |
| Troms Offshore Management AS | Sandnes | 2011 |
| Troms Og Finnmark Taxi AS | Tromsø | 2022 |
| Troms Taxi AS | Tomasjord | 1996 |
| Tromsbuss AS | Tomasjord | 2020 |
| Tromsdalshavna SA | Tromsdalen | 1975 |
| Tromsocompass AS | Kvaløya | 2025 |
| Tromspotet AS | Silsand | 1994 |
| Tromsø Assistanse AS | Tromsø | 2001 |
| Tromsø Bagasjeservice AS | Tromsø | 2025 |
| Tromsø Bilredning 24/7 AS | Tromsø | 2017 |
| Tromsø Bud Og Catering Da | Tromsø | 1996 |
| Tromsø Budbil Sentral AS | Tromsø | 1996 |
| Tromsø Busscharter AS | Brønnøysund | 2013 |
| Tromsø Båtcharter AS | Kvaløya | 2010 |
| Tromsø Kranbilservice AS | Kvaløya | 2015 |
| Tromsø Maskin Og Transport AS | Tromsø | 2016 |
| Tromsø Maxitaxi Ans | Tromsø | 2015 |
| Tromsø Offentlige Parkering AS | Tromsø | 2014 |
| Tromsø Parkering AS | Tromsø | 2013 |
| Tromsø Skipsmegling AS | Tromsø | 2025 |
| Tromsø Taxi AS | Tromsø | 2001 |
| Tromsø Transport Og Kompetanse AS | Tromsdalen | 2026 |
| Tromsø Transportservice Da | Tromsdalen | 2004 |
| Tromsø Yacht Adventure AS | Vestre Jakobselv | 2026 |
| Tromsøterminalen AS | Tromsø | 1999 |
| Trond a Kittilsen Shipping AS | Stathelle | 1992 |
| Trond Eriksen Transport AS | Fauske | 2011 |
| Trond Frank Og Tom Frakt AS | Alta | 1992 |
| Trond Johnsens Transport AS | Rudshøgda | 2008 |
| Trond Lunde Holding AS | Oslo | 2022 |
| Trond Løvold AS | Åheim | 2025 |
| Trond Råkil Holding AS | Greåker | 2021 |
| Trond Råkil Transport AS | Greåker | 2021 |
| Trondheim Boatman AS | Trondheim | 2013 |
| Trondheim Flyttebyrå AS | Tiller | 2026 |
| Trondheim Frakt AS | Trondheim | 2019 |
| Trondheim Grus & Betong AS | Fannrem | 2015 |
| Trondheim Kjøle- Og Fryselager AS | Trondheim | 1995 |
| Trondheim Kranservice AS | Bosberg | 2020 |
| Trondheim Limousine AS | Trondheim | 2017 |
| Trondheim Maxitaxi AS | Saksvik | 2019 |
| Trondheim Parkering AS | Trondheim | 2018 |
| Trondheim Taxi AS | Trondheim | 2012 |
| Trondheim Taxi Tel AS | Trondheim | 2021 |
| Trondheim Taxidrift AS | Oslo | 2016 |
| Trondheim Varetransport AS | Ranheim | 2021 |
| Trondheimsterminalen AS | Trondheim | 2013 |
| Trondhjems Seilforening Havn AS | Trondheim | 1999 |
| Tronds Marine Service AS | Høylandsbygd | 2016 |
| Trones Persontransport AS | Trones | 2021 |
| Trons Transport AS | Jessheim | 2018 |
| Tronstad Service AS | Oslo | 1997 |
| Tropisk Taxi AS | Kristiansand S | 2022 |
| Troøien Transport AS | Singsås | 2015 |
| Troøyen Transport AS | Vang På Hedmarken | 2022 |
| Truck IT AS | Gardermoen | 2019 |
| Truck Service Piotr Rummel | Pl-89311 Fakmierowo | 2017 |
| Truck Sjåførutleie AS | Åfjord | 2023 |
| True Motion AS | Saltnes | 2025 |
| Truls Hammer AS | Sortland | 2021 |
| Trulssen Bil Og Transport AS | Finnsnes | 1998 |
| Trust AS | Paradis | 2010 |
| Trust Forwarding Norway AS | Gardermoen | 2001 |
| Trust One AS | Paradis | 2018 |
| Trust Two AS | Paradis | 2017 |
| Trusted Taxi AS | Sjetnemarka | 2019 |
| Tryg Transport AS | Nesttun | 2021 |
| Trygg Flyg AB | S-611 92 Nykøping | 1997 |
| Trygg Leveranse AS | Lørenskog | 2014 |
| Trygg Logistikk AS | Oslo | 2023 |
| Trygg Norges Transport AS | Oslo | 2018 |
| Trygg Seilas AS | Larvik | 2020 |
| Trygg Trafikkdirigering AS | Kviteseid | 2022 |
| Trygg Transport - AS | Kristiansund N | 2024 |
| Trygg Transport 24-7 AS | Oslo | 2022 |