| Tønnesen Mur & Flis AS | Gressvik | 2023 |
| Tønnessen Bygg AS | Grimstad | 2018 |
| Tønnessen Og Lillemo AS | Hommersåk | 2021 |
| Tønnessen Og Lillemo Holding AS | Hommersåk | 2021 |
| Tønnessen VVS AS | Lillesand | 2026 |
| Tønnevoldskogen AS | Grimstad | 2019 |
| Tønsberg & Færder Rørservice AS | Husøysund | 2019 |
| Tønsberg Blikk Og Montasje AS | Barkåker | 2012 |
| Tønsberg Bygg Og Rehabilitering AS | Tønsberg | 2003 |
| Tønsberg Bygg-Service AS | Barkåker | 2011 |
| Tønsberg Byggteknikk AS | Husøysund | 2019 |
| Tønsberg Elektriske AS | Tønsberg | 1994 |
| Tønsberg Mur Og Flis AS | Nøtterøy | 2024 |
| Tønsberg Tak AS | Tønsberg | 2019 |
| Tønsberg Taktekking AS | Vear | 2026 |
| Tønsbergbrygga AS | Nøtterøy | 2019 |
| Tønseth Maskin AS | Ådalsbruk | 2018 |
| Tørmo Maskin Og Utemiljø AS | Matrand | 2022 |
| Tørre & Skretteberg Ans | Vikersund | 1994 |
| Tørre & Skretteberg AS | Vikersund | 2016 |
| Tørresdal Eiendom AS | Skjoldastraumen | 2014 |
| Tørresdal Forskaling AS | Skjoldastraumen | 2014 |
| Tørresdal Holding AS | Skjoldastraumen | 2014 |
| Tørresen Bygg AS | Lindesnes | 2016 |
| Tørresen Eiendom AS | Mandal | 2004 |
| Tørressen Holding AS | Sandnes | 2019 |
| Tørset Maskin AS | Rennebu | 2021 |
| Tørt Bygg AS | Oslo | 2006 |
| Tørvikbygd Byggservice AS | Tørvikbygd | 2016 |
| Tøsdal Invest AS | Os | 2005 |
| Tøsdal Maskinstasjon AS | Os | 2005 |
| Tøyen Holding AS | Oslo | 2016 |
| Tømmermester Ola Rogn A/S | Jar | 1987 |
| U & S Entreprenør AS | Hønefoss | 2022 |
| U&M Holding AS | Skodje | 2021 |
| U-I-R Elektriker AS | Stavanger | 2024 |
| U.R.B.G Mariusz Lukaszewski | 06-323 Jednorozec | 2006 |
| U.S Engineering AB | Se-518 40 Sjömarken | 2012 |
| U9T Invest AS | Stjørdal | 2021 |
| Ua Bygg AS | Undheim | 2024 |
| Ua Service AB | Se-831 48 Östersund | 2020 |
| Uab "Green Wood Products" Nuf | Lt-14202 Buiniskiu | 2026 |
| Uab Aimis | Lt-05120 Vilnius M Sav | 2017 |
| Uab Aljr Baltic | Lt-95134 Klaipeda | 2015 |
| Uab Antonas Bygg Nuf | Drammen | 2011 |
| Uab Antvita | Lt-20195 Ukmerges R. Sav | 2015 |
| Uab Apastata | Lt-72310 Taurage | 2019 |
| Uab Arlanga Nuf | Søreidgrend | 2004 |
| Uab Armaturos Karkasai | Lt-91234 Klaipeda | 2018 |
| Uab Arpolis | 64392 Alytus | 2015 |
| Uab Arvarida Nuf | Lt-47183 Kaunas | 2025 |
| Uab Assemio Nuf | 03015 Vilnius | 2025 |
| Uab Aurolsa Nuf | Lt-09302 Vilnius | 2025 |
| Uab BM Service Nuf | Lt-96146 Gargzdai | 2026 |
| Uab Bonderus | Lt-02115 Vilnius | 2015 |
| Uab Caverion Lietuva | Lt-Vilnius City | 2015 |
| Uab Construction&Renovation Projects Nuf | Lt-45302 Kaunas | 2012 |
| Uab Darbuotojas Nuf | Rådal | 2014 |
| Uab David and Co Nuf | Hønefoss | 2012 |
| Uab Deistera Nuf | Lt-90165 Plunge | 2025 |
| Uab Desaitas Norge Nuf | Uab Desaitas | 2011 |
| Uab Eddv Nuf | Lt-92284, Klaipedos R | 2026 |
| Uab Edgaras Ir Ko Nuf | Lt 5400 Siauliai | 2005 |
| Uab Elics Engineering Nuf | 89103 Mazeikiai | 2020 |
| Uab Emneta | Lt-17-218 Utena | 2016 |
| Uab Eriteja | Lt-92308 Klaipeda | 2015 |
| Uab Esma LT | Lt-62343 Altus | 2017 |
| Uab Eurotinklai | Lt-09117 Vilnius | 2019 |
| Uab Farveta LT | Lt-99148 Silute | 2018 |
| Uab Favorica | Lt-18209 Svencioneliai | 2016 |
| Uab Forgedot | 92138 Klaipeda | 2021 |
| Uab Fpi Baltic | Lt-46401 Kaunas | 2011 |
| Uab Fragis LT Nuf | Lt-44253 Kaunas | 2024 |
| Uab Franjoda | Lt-88320 Telsiu R. Sav. | 2018 |
| Uab G&G Construction | Lt-38449 Panevezys | 2015 |
| Uab Gantus | 38130 Panevezio Raj | 2009 |
| Uab Ginstar | 20126 Telsiai | 2016 |
| Uab Good Guys Nuf | Lt-03111 Vilnius | 2026 |
| Uab Hippo Feliz | Lt-42334 Rokiskio R Sav | 2018 |
| Uab Htcc | 96361 Micku K. Klapeidos R. | 2012 |
| Uab Husvytas | Lt-86104 Kelme District Municipalit | 2019 |
| Uab Inlay Nuf | Lt-38130 Liudynes K., Panevezio Raj | 2025 |
| Uab Inter-Silo | Lt-12112 Vilnius | 2020 |
| Uab Itcc Nuf | Lt-89100 Mazeikiai | 2020 |
| Uab Kalpas Nuf | Lt-00205 Palanga | 2025 |
| Uab Kampainis | Lt-95177 Klapeida | 2017 |
| Uab Karmo Invest | Lt-60257 Ariogala | 2019 |
| Uab Kasmanta Nuf | Kristiansund N | 2009 |
| Uab Kegesa | Lt-91272 Lietuva | 2010 |
| Uab Key Elements | Oslo | 2011 |
| Uab Kijora Nuf | Lt-92347 Klaipeda | 2025 |
| Uab Komoda LT Nuf | Lt-37188 Panevezys | 2026 |
| Uab Kêdainiu Statyba | Lt-58191 Kedainiu R | 2019 |
| Uab Labora Vis | Lt-63210 Alytus | 2016 |
| Uab Levrox Services | Lt-89153 Mazeikiai Dis. | 2023 |
| Uab Linorvas Ir Ko Nuf | Lt-82174 Radviliskis | 2018 |
| Uab Litana Construction Nuf | Stathelle | 2025 |
| Uab Litcoma | Lt-91266 Klaipeda | 2016 |
| Uab Litgoras Nuf | Lt-92112 Klaipeda | 2015 |
| Uab Litimberos Statyba | Lt-96176 Klaipedos R | 2017 |