| TGG Service AS | Tiller | 2016 |
| TGH Holdings AS | Trondheim | 2000 |
| TGS Energy Singapore Pte. Ltd. | Sg-Singapore 048581 | 2002 |
| TGS Live AS | Laksevåg | 2023 |
| TGS Service Partner AS | Dal | 2016 |
| TH Eiendomsservice AS | Sørum | 2023 |
| TH Expert Cleaners AS | Sellebakk | 2026 |
| TH Run Travels AS | Sandnes | 2017 |
| TH Tjenester AS | Drammen | 2020 |
| TH Utleie AS | Sandnes | 2024 |
| Th-Konsulenttjenester AS | Kongsberg | 2021 |
| TH. Agro AS | Rissa | 2003 |
| Thai Home Ans | Yven | 2007 |
| Thai Nor Living AS | Vikhammer | 2026 |
| Thailandopplevelser AS | Sandnessjøen | 2016 |
| Thaiplus AS | Hafrsfjord | 2018 |
| Thair Renhold | Oslo | 2010 |
| Thales | 92526 Neuilly-Sur-Seine, Cedex | 2014 |
| Thales Ground Transportation Systems UK Limited | Berkshire Rg2 6Gf | 2019 |
| Thales Portugal S.A. | 2770 - 153 Paco De Arcos | 2018 |
| Thales Training & Simulation | Oslo | 2015 |
| Thaqi Holding AS | Strømmen | 2024 |
| The 4 Investment AS | Arendal | 2021 |
| The Advantage Norway | Ie-Cork T12 A9D7 | 2023 |
| The Angel Foundation Nuf | Oslo | 2013 |
| The Arctic Resort Company AS | Tromsø | 2025 |
| The Arctic Train AS | Narvik | 2023 |
| The Aviation Recruitment & Consulting Group Ltd | W1W 7Lt London | 2018 |
| The Bergen Event Company AS | Bjørøyhamn | 2021 |
| The Best Brazilian Butchers Services Limited | Ie-Wexford | 2025 |
| The Best of Tromso AS | Gryllefjord | 2023 |
| The Boston Consulting Group GmbH | De-80539 München | 2016 |
| The Boston Consulting Group SDN. BHD | My-50250 Wilayah Persekutuan | 2026 |
| The Cleaning Crew AS | Leirsund | 2015 |
| The Connector AS | Hokkåsen | 2018 |
| The Dram Whisky Consulting AS | Heggedal | 2015 |
| The Event AS | Kristiansand S | 2023 |
| The Field Station AS | Ingøy | 2022 |
| The Fjords Fartøy I Da | Flåm | 2015 |
| The Fjords Fartøy II Da | Flåm | 2017 |
| The Fjords Fartøy IV Da | Flåm | 2023 |
| The Force Da | Sarpsborg | 2006 |
| The Golden Train AS | Åndalsnes | 2023 |
| The Golle Máze AS | Maze | 2024 |
| The Great Life Company AS | Oslo | 2002 |
| The Green Adventure Tours AS | Fjordgard | 2021 |
| The Green Investment AS | Oslo | 2021 |
| The Happy Surfers AS | Vettre | 2021 |
| The Hidden North AS | Bergen | 2023 |
| The Icelandic Hunting Club AS | Årnes | 2017 |
| The Innovation Initiative AS | Oslo | 2021 |
| The International Bunker Conference (Ibc) SA | Oslo | 2016 |
| The Key AS | Oslo | 2008 |
| The Locals AS | Tessanden | 2026 |
| The Lucky Pig AS | Oslo | 2019 |
| The Luxury Travel Designer AS | Jøkelfjord | 2020 |
| The Makai Travel Group | Vrådal | 2016 |
| The Mcknight Foundation | Mn 55401 Minneapolis | 2022 |
| The Mice Guru AS | Sandnes | 2018 |
| The Network AS | Stavanger | 2023 |
| The Nordic Events AS | Oslo | 2025 |
| The North West AS | Ålesund | 2017 |
| The Northcape Experience AS | Honningsvåg | 2017 |
| The Norwegian Travel Company AS | Tromsø | 2019 |
| The Panda AS | Oslo | 2019 |
| The Percussion Collegium AS | Stavanger | 2022 |
| The Pro Drift AS | Trondheim | 2024 |
| The Production Company AS | Oslo | 2019 |
| The Qrill Company Services AS | Lysaker | 2013 |
| The Quartz Corp USA Nuf | Spruce Pine, North Carolina 28777 | 2024 |
| The Quest AS | Bergen | 2024 |
| The Real Experience AS | Laksevåg | 2023 |
| The Real North AS | Bjørnevatn | 2025 |
| The Sales Factory AS | Oslo | 2019 |
| The Sauna Club AS | Molde | 2023 |
| The Soccer Agent AS | Melsomvik | 2016 |
| The Social Club AS | Oslo | 2024 |
| The Swedish Trade and Invest Council | Oslo | 1995 |
| The System Trade | Cz-190 16 Praha 9 | 2018 |
| The Toronto-Dominion Bank | M5K 1A2 Toronto | 2021 |
| The Travel Company Nuf | Oslo | 2019 |
| The Travel Designer AS | Jøkelfjord | 2020 |
| The True North Experience AS | Storsteinnes | 2026 |
| The Vibe AS | Oslo | 2019 |
| The Vélo Experience AS | Fornebu | 2019 |
| The We Select Company AB Norge | Se-111 51 Stockholm | 2019 |
| The Whale Drift AS | Andenes | 2020 |
| The Woody Ant AS | Stadlandet | 2024 |
| Thea Wenche Sundt Holding AS | Svartskog | 2005 |
| Thengs Multiservice AS | Andebu | 2021 |
| Thermo Tours AS | Askim | 2010 |
| Theros Collection AS | Oslo | 2015 |
| Thessalian Ltd | Truro Tr3 6Eu | 2020 |
| Theta Capital AS | Stavanger | 2020 |
| Thevent AS | Hernes | 2016 |
| THH Utleie AS | Krokelvdalen | 2024 |
| This Is Entertainment AS | Vestre Gausdal | 2018 |
| This Is Juke AS | Trondheim | 2024 |
| Thole Invest AS | Åseral | 2005 |
| Thomas Cook UK Limited | Oslo | 2003 |