| Terje Skjelvik AS | Bøvågen | 2014 |
| Terje Skundberg Transport AS | Vang På Hedmarken | 2014 |
| Terje Tandberg Transport AS | Geithus | 2005 |
| Terje Titland Taxi AS | Bøvågen | 2021 |
| Terma AS | Olsvik | 2000 |
| Terminal 1 AS | Gardermoen | 2022 |
| Terminal 1 Holding AS | Gardermoen | 2022 |
| Terminal Og Bud Service AS | Oslo | 2001 |
| Terminal Og Truck AS | Skedsmokorset | 2020 |
| Terminalbygget AS | Oslo | 1988 |
| Terminaldrift AS | Oslo | 2024 |
| Terminallasting AS | Stange | 1993 |
| Terminaltjenester AS | Bergen | 2016 |
| Termo Partner AS | Stryn | 2012 |
| Termo Partner Transport AS | Stryn | 1991 |
| Termobud AS | Sørumsand | 2018 |
| Termoxpress AS | Mjøndalen | 2012 |
| Terntank Rederi | Dk-9990 Skagen | 2015 |
| Terra AS | Rygge | 1995 |
| Terrengpartner AS | Froland | 2014 |
| Terråk Taxi AS | Terråk | 2025 |
| Terstu Transport Da | Bruvoll | 2006 |
| Tesdal Transport AS | Voss | 2015 |
| Teseios AS | Vikhammer | 2026 |
| Tesmon AS | Hommelvik | 2020 |
| Tet Travel AS | Kristiansand S | 2021 |
| Tetlie Transport AS | Spillum | 1998 |
| Teto Invest I AS | Farsund | 1991 |
| Tetova Åkeri AB | Se-382 38 Nybro | 2020 |
| Tewe Transport Og Utleige AS | Dalsøyra | 2019 |
| TF. Holding AS | Klokkarvik | 2018 |
| TFT Holding AS | Alta | 2023 |
| TG Sjøservice Og Transport AS | Langevåg | 2018 |
| Tga Transport AS | Bøverbru | 2014 |
| TH Express AS | Kristiansund N | 2026 |
| TH Gabrielsen Transport AS | Flekkefjord | 1987 |
| TH Jacobsen Management AS | Oslo | 1995 |
| TH Solutions AS | Son | 2021 |
| TH Transport AS | Kirkenes | 2025 |
| TH Transport Og Utleie AS | Brårud | 2006 |
| Th-Bergan AS | Stokke | 2015 |
| TH. Liens Turistbusser A/S | Hokksund | 1988 |
| Thai Airways International Public Company Ltd | Oslo | 1995 |
| Thale Tankers AS | Bergen | 2021 |
| Thamsgatens Parkeringshus AS | Drammen | 2013 |
| The Aviation Factory Norway AS | Lillestrøm | 2025 |
| The Fjords Da | Flåm | 2015 |
| The Fjords Fartøy III Da | Flåm | 2018 |
| The Fjords Management AS | Flåm | 2015 |
| The G7 AS | Oslo | 2023 |
| The Marine Centre LLC Norway | Tampa 33647 Florida | 2005 |
| The Norwegian Travel Company Holding AS | Tromsø | 2021 |
| Thebera Invest AS | Oslo | 1998 |
| Thermo Cargo AS | Rakkestad | 2024 |
| Thermo Speed Magdalena Bielusz | Pl 77-400 Dzierzazenko | 2018 |
| Thermo Transit Finland OY | Fi-65380 Vasa | 2012 |
| Thermo Transport AS | Nordkjosbotn | 2012 |
| Thermo-Transit Danmark | Dk-6330 Padborg | 2012 |
| Thermo-Transit Norge AS | Frogner | 1994 |
| Thermo-Transit Poland Spolka Zoo | Pl-74320 Barlinek | 2018 |
| Thermoline Tromsø AS | Finnsnes | 2017 |
| Thermomax Trondheim AS | Heimdal | 2002 |
| Thermotank AS | Straumgjerde | 1990 |
| Thick & Thin AS | Oslo | 2025 |
| Thingstad Rune Transport AS | Drammen | 2024 |
| Thom-As Transport AS | Stryn | 2025 |
| Thomas F. Thomassen AS | Alta | 2016 |
| Thomas Fredriksen AS | Skui | 2008 |
| Thomas Jakobsen AS | Siljan | 2000 |
| Thomas Møbeltransport AS | Lommedalen | 2017 |
| Thomas Olsen AS | Sørreisa | 2025 |
| Thomas P Ness AS | Haslum | 1990 |
| Thomas Severinsen Transport AS | Halden | 2021 |
| Thomas Tollefsen AS | Hakadal | 2017 |
| Thomas Transport AS | Oslo | 2002 |
| Thomassen Maskin Og Transport AS | Sørstraumen | 2005 |
| Thomassen Transport AS | Alta | 1989 |
| Thome Offshore Management Pte Ltd | 048581 Singapore | 2019 |
| Thome Ship Management Norway AS | Oslo | 2000 |
| Thomsen Kran Og Transport AS | Sellebakk | 2017 |
| Thor Bech Hansen Transport AS | Trondheim | 1996 |
| Thor Dahl Management AS | Sandefjord | 1996 |
| Thor Dahl Shipping AS | Oslo | 2023 |
| Thor E. Grotle Transport AS | Notodden | 2014 |
| Thor Eddy Hansen AS | Larvik | 1994 |
| Thor Gundersen AS | Hamar | 2004 |
| Thor Skogen Transport AS | Dokka | 2007 |
| Thor Tenden Transport AS | Stryn | 1987 |
| Thorax AS | Haugesund | 2025 |
| Thoresen & Moen AS | Oslo | 1974 |
| Thoresen Transport Avd. Lastebil AS | Larvik | 2012 |
| Thormod Saue Transport AS | Lier | 1995 |
| Thors Varetransport Holding AS | Svolvær | 2001 |
| Thorstad Transport AS | Vormsund | 1986 |
| Thorsteinsen Transport Og Graving AS | Ski | 2017 |
| Thorsteinsson & Ingebrigtsen Transport AS | Oslo | 2018 |
| Thorvaldsen & Sønn Transport AS | Tønsberg | 2012 |
| Thovsland Invest AS | Skien | 2013 |
| Thu Lis Transport Da | Årdalstangen | 1994 |
| Thuen Taxi AS | Oslo | 2024 |