| Tysnes Lydutleige Ans | Tysnes | 2001 |
| Tz-Shops South Sweden AB Nuf | Se-111 20 Stockholm | 2025 |
| Temareiser AS | Ski | 1988 |
| Tännström Spårteknik AB | Se-78 692 Dala-Järna | 2018 |
| Tågåkeriet I Bergslagen AB | 68130 Kristinehamn | 1998 |
| Tåke AS | Stavanger | 2024 |
| Tøllefsen Holding AS | Kvaløya | 2020 |
| Tøllefsen Traktor Da | Botnhamn | 2004 |
| Tømmerhoggerne Maskin Og Eiendom AS | Heggenes | 2021 |
| Tømmervika Opplevelsessenter AS | Tjøtta | 2024 |
| Tømmervogner AS | Oslo | 2003 |
| Tømmerås Service AS | Lismarka | 2026 |
| Tøn Holding AS | Biri | 2014 |
| Tønnesen Og Moi AS | Moi | 2016 |
| Tønsberg Hageservice AS | Sem | 2023 |
| Tønsberg Lyd Og Lys AS | Sem | 2016 |
| Tønsberg Sand- Og Tørrisblåsing AS | Tønsberg | 2017 |
| Tønsberg Tjenester AS | Nøtterøy | 2019 |
| Tønsberg-Villaservice AS | Husøysund | 2017 |
| Tønsvik Maskinstasjon AS | Krokelvdalen | 2022 |
| Tøraasen Eiendom AS | Nybergsund | 2021 |
| Tøraasen Invest AS | Nybergsund | 2021 |
| Tørnby AS | Rømskog | 2021 |
| Tørrfisk Fra Lofoten AS | Leknes | 2010 |
| Tørrisblåsing Møre Og Romsdal AS | Ålesund | 2022 |
| Tørset Bil Holding AS | Sunndalsøra | 2025 |
| Tøyen Sentrum Driftstjenesten Da | Oslo | 2008 |
| U.A.B Baltic Salmon Nuf | Lt-93235 Klaipeda | 2011 |
| U/H Maskinstasjon Da | Engavågen | 2019 |
| U4 Service AS | Sandefjord | 2024 |
| U9KT AS | Stavanger | 2022 |
| Uab "Brigg HR Lithuania" Nuf | Lt-76129 Siauliai | 2026 |
| Uab Alfa Crewing Bureau | Lt-98118 Skuodas | 2017 |
| Uab Alinava | 86262 Kelmes R. | 2008 |
| Uab Artaleka | Lt-93235 Klaipeda City | 2014 |
| Uab Atlantic Boats | Haugesund | 2007 |
| Uab Audrena | Lt-70101 Vilkaviskis | 2017 |
| Uab Baltic Bygg Partners Nuf | Sandnes | 2008 |
| Uab Baltic Energy Service | Lt-95130 Klaipeda | 2015 |
| Uab Bestevaskas Nuf | Vilnius By | 2019 |
| Uab Busnex Nuf | Lt-02189 Vilnius | 2021 |
| Uab Cia Ten Ir Visur | Oslo | 2005 |
| Uab Contus Norge Nuf | Tønsberg | 2013 |
| Uab CRT Partner | Lt-08221 Vilius | 2016 |
| Uab Deklora | 91227 Klaipeda | 2006 |
| Uab Ertesa | Lt-78311 Siauliai | 2016 |
| Uab Fjord Sales | Lt 93235 Klaipeda | 2018 |
| Uab Globalita Projects | Lt-91213 Klaipeda | 2022 |
| Uab Globus Bemanning | Lt- 44354 Kaunas | 2019 |
| Uab GSS | 75300 Silales R | 2008 |
| Uab Laboris | Lt-89179 Mazeikiai | 2017 |
| Uab Limesa | Lt-50294 Kaunas | 2017 |
| Uab Litnorva | 96184 Gargzdai | 2009 |
| Uab Mabrocona | Lt-92227 Klaipeda | 2018 |
| Uab Marine International | Kongshavn | 2015 |
| Uab Me Trailers Nuf | 13279 Vilnius | 2013 |
| Uab Nodas | Lt-98111 Skuodas | 2012 |
| Uab Nomista | Krøderen | 2008 |
| Uab Norbeta | 90166 Plunge | 2010 |
| Uab Nordesa Nuf | Lt-94198 Klaipeda | 2009 |
| Uab Nordic Salmon Nuf | Lt-93235 Klaipeda | 2013 |
| Uab Nordradus | Lt- Vilnius | 2017 |
| Uab Norelita | Klaipedos R. Sav | 2014 |
| Uab Norvegijos Kontaktai | Stavanger | 2006 |
| Uab Norvetuva Nuf | Lt-90162 Plunge | 2005 |
| Uab on Off Staffing Group | Lt-44283 Kaunas | 2010 |
| Uab Orito Nuf | Oslo | 2011 |
| Uab Recruitment Services LT Nuf | Austrheim | 2017 |
| Uab Reditus LT Nuf | 48271 Kaunas | 2015 |
| Uab SBM Scandinavian Building Masters | 02112 Vilnius | 2012 |
| Uab Selectant | Lt-03228 Vilnius | 2018 |
| Uab Stansefabrikken | 20194 Ukmerge | 2014 |
| Uab Temp Nuf | Lt-91229 Klaipeda | 2018 |
| Uab Tonagra | 94107 Klapeida | 2009 |
| Uab Velduva | Lt-90112 Plunge | 2019 |
| Uab Verslo Kultas | Lt - 91222 Klaipeda | 2014 |
| Uab Vilbangis | 91249 Klaipeda | 2011 |
| Uab Vinrenta Nuf | Lt-89101 Mazeikiai | 2024 |
| Uab Win Baltic | Lt-03209 Vilnius | 2012 |
| UCAN2 West AS | Oslo | 2000 |
| Ucm AS | Oslo | 2005 |
| Udnes AS | Årnes | 2012 |
| Udnes Utemiljø AS | Årnes | 2005 |
| Ue Andersen AS | Brumunddal | 2021 |
| Ufo Treskelag Da | Hønefoss | 2004 |
| Ugland Marine Management AS | Grimstad | 2008 |
| Uhuru AS | Sofiemyr | 2012 |
| UK Bemanning & Håndverktjenester AS | Oslo | 2021 |
| UK Fotball AS | Frei | 2021 |
| Ukranor AS | Hauge I Dalane | 2024 |
| Ulabrand Industrier AS | Oslo | 1997 |
| Ulla Arctic AS | Longyearbyen | 2013 |
| Ulleberg & Rosvold Ans | Trondheim | 2001 |
| Ullensaker Bygdeservice AS | Algarheim | 2024 |
| Ullensaker Renholdsteknikk AS | Kløfta | 2010 |
| Ullensaker Utleie AS | Jessheim | 2014 |
| Ullensaker Vaktmesterservice AS | Gardermoen | 2026 |
| Ullensvang Kiosk & Gatekjøkken Da | Lofthus | 1990 |
| Ullern Eiendomsservice AS | Moss | 2016 |
| Ullern Lyd&Lys Da | Oslo | 2025 |