| TNT Home Improvements Ltd | Construction | 2026 |
| Tom's Car Barn Limited | Transport & logistics | 2022 |
| Tomlinson Longstaff Limited | Construction | 1975 |
| Toot Marketing Limited | Professional & scientific | 2026 |
| Top House Bar & Restaurant Limited | Hospitality | 2011 |
| Top Quality Services Inc Ltd | Construction | 2024 |
| Total Payroll Solutions Ltd | Professional & scientific | 2024 |
| Total Planning Solutions (UK) Limited | Construction | 2013 |
| Totherescue Construction Services Ltd | Construction | 2022 |
| TOW Law Autocare Limited | Wholesale & retail | 2022 |
| TOW Law Community Association | Education | 2007 |
| TOW Law Plastering Services Ltd | Construction | 2008 |
| Town Square (Horsforth) Limited | Households | 2006 |
| TR Bushby Consultancy Limited | Professional & scientific | 2017 |
| Tracking Solutions Ltd | Information & communication | 2018 |
| Trade Frames Direct (North East) Ltd | Construction | 2018 |
| Tramco Services Limited | Manufacturing | 2004 |
| Trans Eduard Limited | Transport & logistics | 2023 |
| Traynor Construction Ltd | Construction | 2017 |
| Treble 17 Ltd | Real estate | 2018 |
| Tree Appeal.Com Limited | Professional & scientific | 2010 |
| Tremfab Architectural Fabrication Ltd | Manufacturing | 2024 |
| Tren-D Student Accommodation Limited | Extraterritorial | 2016 |
| Trevor Burns Fencing Contractors Limited | Construction | 2022 |
| Trimmers B&C Ltd | Other services | 2022 |
| Trinity Kitchens (NE) Limited | Manufacturing | 2004 |
| Triton Controls Limited | Manufacturing | 1994 |
| True Line C.W Ltd | Construction | 2026 |
| Truly Scrumptious Hair and Beauty Limited | Other services | 2014 |
| Tsunami Bulldogges Limited | Wholesale & retail | 2022 |
| Tsunami Poke Ltd | Wholesale & retail | 2026 |
| Turbo Pacs Ltd | Wholesale & retail | 2010 |
| Turners Decorating Limited | Construction | 2024 |
| Turning Moment Limited | Professional & scientific | 2012 |
| TW Electrical Ltd | Construction | 2026 |
| TWENTY2 (NE) Ltd | Real estate | 2023 |
| U.K.Heritage Rugs Ltd. | Wholesale & retail | 2013 |
| UA Consulting Limited | Professional & scientific | 2013 |
| UK Equine Ltd | Construction | 2024 |
| UK Future Homes Ltd | Construction | 2019 |
| UK Resilient Structures Ltd | Construction | 2023 |
| UK Storage Vaults Limited | Transport & logistics | 2020 |
| UK Wholesale NE Limited | Wholesale & retail | 2025 |
| Ukama Noire Limited | Professional & scientific | 2016 |
| Ukgp Limited | Hospitality | 2017 |
| Ultimate Flowers Ltd | Wholesale & retail | 2019 |
| Ultimate Landscaping UK Limited | Administrative & support | 2025 |
| Undersiege Ltd | Arts & recreation | 2012 |
| Unetco Securities Limited | Professional & scientific | 1999 |
| UNIQUE2U Photography Ltd | Professional & scientific | 2008 |
| United Electrical Solutions Ltd | Construction | 2020 |
| Universal Premium Products Ltd | Wholesale & retail | 2026 |
| Universal Smart Product Ltd | Wholesale & retail | 2026 |
| Uppertier Roofing Services Limited | Construction | 2013 |
| Upton Ventures Limited | Information & communication | 2025 |
| Urban FOX Tales CIC | Administrative & support | 2024 |
| Urgency Ltd | Professional & scientific | 2019 |
| Ursa Major Racing Ltd | Arts & recreation | 2021 |
| Uswayford Farm Limited | Agriculture & fishing | 1930 |
| Valentinos (NE) Limited | Hospitality | 2023 |
| Valerio Jewellery Limited | Manufacturing | 2024 |
| Valley View Food Company Ltd | Manufacturing | 2020 |
| Vantage Core Commercial Group Ltd | Construction | 2026 |
| Varvick Care Ltd | Administrative & support | 2018 |
| Vasanthy Limited | Wholesale & retail | 2021 |
| VC Project Management Limited | Professional & scientific | 2002 |
| VDL Tech Limited | Information & communication | 2015 |
| Venture Managed Solutions Ltd | Water & waste | 2020 |
| Verity Property Holdings Ltd | Real estate | 2025 |
| Verity Property Management Ltd | Real estate | 2026 |
| Vertexvending Ltd | Wholesale & retail | 2026 |
| Vest Construction Limited | Extraterritorial | 2004 |
| Veteran Shooting Supplies Ltd | Wholesale & retail | 2026 |
| Village Cakery BA Limited | Manufacturing | 2026 |
| Vinovia Property Ltd | Real estate | 2022 |
| Vinovium Developments Limited | Extraterritorial | 2001 |
| Vinovium Security Limited | Administrative & support | 1998 |
| VIP Animal Bedding Limited | Manufacturing | 2023 |
| Vipond Biomass Limited | Agriculture & fishing | 2016 |
| Viridis Environmental Solutions Ltd | Professional & scientific | 2014 |
| Vision Coaching Ltd | Education | 2022 |
| Vision Coating Ltd | Construction | 2019 |
| Vista Playgrounds Limited | Construction | 2026 |
| Vistaprop Group Limited | Real estate | 2026 |
| Vklegalservices Ltd | Administrative & support | 2024 |
| Voicepower Consulting Ltd | Professional & scientific | 2022 |
| Voicepower Limited | Wholesale & retail | 1993 |
| W a Shaw Properties Limited | Real estate | 2021 |
| W E & M G Redfearn Ltd | Wholesale & retail | 2010 |
| W H Surveying Limited | Professional & scientific | 2010 |
| W. Robson (Farm) Limited | Agriculture & fishing | 1985 |
| W.G. Events Ltd | Hospitality | 2025 |
| Wacc | Other services | 2009 |
| Wades Accountancy Ltd | Professional & scientific | 2022 |
| Wags Dog Groomers Limited | Other services | 2016 |
| Walker Organics Limited | Administrative & support | 2003 |
| Walkers Joinery and Woodcraft Limited | Construction | 2015 |
| Wallerthwaite Management Company Limited | Households | 2019 |
| Walton Windows Ltd | Manufacturing | 2003 |
| Waskerley Workshops Ltd | Other services | 2025 |