| Trumpf Laser SE Nuf | De-78713 Schramberg | 2024 |
| Trumpf Laser- Und Systemtechnik SE Nuf | De-71254 Ditzingen | 2024 |
| Trumpf Maschinen Austria GmbH & Co KG | At-4061 Pasching | 2023 |
| Trumpf Maskin AB | Se-441 39 Alingsås | 2015 |
| Trumpf Sachsen SE Nuf | De-01904 Neukirch | 2024 |
| Trumpf Schweiz AG | Ch-7214 Gruesch | 2023 |
| Trumpf Werkzeugmaschinen Se+Co. KG Nuf | De-71254 Ditzingen | 2023 |
| Trunken AS | Vanse | 2004 |
| Trura AS | Elverum | 2005 |
| Trust Few Clothing AS | Drammen | 2020 |
| Trutex Limited | Lancashire Bb7 1Nl | 2024 |
| Truzt Automegler AS | Leinstrand | 2025 |
| Truzt Holding AS | Trondheim | 2025 |
| TRX Electronic Norway AS | Lysaker | 2011 |
| TRX Equipment AS | Sundebru | 2020 |
| Trygg & Klar Motor AS | Råholt | 2026 |
| Trygg Auto AS | Siggerud | 2023 |
| Trygg Autohandel AS | Kongsberg | 2025 |
| Trygg Bil AS | Gressvik | 2023 |
| Trygg Bilhandel AS | Os | 2024 |
| Trygg Bilhus AS | Strømmen | 2025 |
| Trygg Bilmegling AS | Kolbotn | 2017 |
| Trygg Brannvern AS | Eidsvoll | 2025 |
| Trygg Eivind Skjelde AS | Stavanger | 2012 |
| Trygg Helse AS | Drammen | 2020 |
| Trygg Idrett AS | Erdal | 2026 |
| Trygg Kvardag AS | Husnes | 2013 |
| Trygg Lås AS | Bryne | 2024 |
| Trygg Netthandel AS | Hamar | 2024 |
| Trygg Partner AS | Eidsvoll | 2014 |
| Trygg Seilas Holding AS | Oslo | 2019 |
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| Trygg Varsel AS | Trondheim | 2026 |
| Trygg-Stiger AS | Våle | 2026 |
| Tryggauto AS | Mjøndalen | 2026 |
| Tryggauto Gallery AS | Furnes | 2025 |
| Tryggest Handel AS | Melhus | 2021 |
| Tryggestad Stasjonsdrift AS | Vollen | 2014 |
| Trygghetsskolen AS | Oksvoll | 2022 |
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| Trykk & Tekstil AS | Vestfossen | 2025 |
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| Tryllepapp AS | Drammen | 2025 |
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| Trysil Autosenter AS | Drevsjø | 2012 |
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| Trysil Fjellhandel AS | Trysil | 2014 |
| Trysil Freelance Ans | Trysil | 2007 |
| Trysil Kontor Og Data AS | Trysil | 2005 |
| Trysil Sportshop AS | Trysil | 2014 |
| Trysil Troll AS | Trysil | 2024 |
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| Trysilbil AS | Trysil | 2014 |
| Trysilfjellet Dagligvare AS | Trysil | 2014 |
| Trysilfjellet Handel AS | Trysil | 2015 |
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| Trådsnello AS | Voss | 2017 |
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| Træ Design | 8700 Horsens | 2016 |
| Træg Trønder AS | Trondheim | 2012 |
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| Træna Handel Eiendom AS | Træna | 2007 |
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| Trøim Dagligvare AS | Hemsedal | 2008 |
| Trøkk.Run AS | Bekkestua | 2026 |
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| Trøndelag Auksjonsforretning AS | Leinstrand | 2025 |
| Trøndelag Bil AS | Trondheim | 2018 |
| Trøndelag Bildeler AS | Hommelvik | 2019 |
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| Trøndelag Bilformidling AS | Brekstad | 2020 |
| Trøndelag Engros AS | Ålesund | 2015 |
| Trøndelag Fiske Og Fritid AS | Levanger | 2019 |
| Trøndelag Fyrverkeri AS | Vikhammer | 2024 |
| Trøndelag Gass AS | Stjørdal | 2001 |
| Trøndelag Motor AS | Steinkjer | 2011 |
| Trøndelag Sankeri AS | Melhus | 2019 |
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| Trøndelag Sjømat AS | Roan | 2022 |
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