| Top Tier Couriers Ltd | Transport & logistics | 2025 |
| Tot.B Gifts Limited | Wholesale & retail | 2021 |
| Total Care Health Clinics Ltd | Health & social care | 2026 |
| Total Plastics (Oldbury) Limited | Manufacturing | 2007 |
| Touch of Klass Ltd | Administrative & support | 2026 |
| Toy Villa Ltd | Wholesale & retail | 2026 |
| Toyant Living Ltd | Hospitality | 2023 |
| TPS Trading Ltd | Hospitality | 2025 |
| Traditional Woodworker Ltd | Manufacturing | 2025 |
| Train Learn Go B'Ham Ltd | Arts & recreation | 2023 |
| Trainwise Limited | Education | 2025 |
| Transcare Ltd | Wholesale & retail | 2018 |
| Transervice Express Transport Limited | Transport & logistics | 1990 |
| Transfab-Uk Ltd | Wholesale & retail | 2013 |
| Transglobal Holding Ltd | Financial services | 2025 |
| Transition Network | Professional & scientific | 2007 |
| Transplant Active UK Limited | Extraterritorial | 2024 |
| Transplant Sport UK | Arts & recreation | 2008 |
| Trendoxa Ltd | Wholesale & retail | 2025 |
| Trendy Wave Shoppers Limited | Wholesale & retail | 2024 |
| Trevari Commerce International Ltd | Wholesale & retail | 2025 |
| Trims on Rims Limited | Other services | 2024 |
| Trinity Investment Partners Limited | Financial services | 2016 |
| Trinity MOT Centre Ltd | Wholesale & retail | 2018 |
| Trio Sphere Store Ltd | Wholesale & retail | 2025 |
| Triple M Global Services Ltd | Wholesale & retail | 2023 |
| Triple S (2015) Ltd | Health & social care | 2015 |
| Triple S Scaffolding Ltd | Construction | 2025 |
| Triple Warm Sealed Units Ltd | Manufacturing | 2014 |
| Tripple M Services Limited | Health & social care | 2021 |
| Tromans Properties Ltd | Real estate | 2024 |
| Trophyestates Limited | Real estate | 2025 |
| Trouth Limited | Administrative & support | 2009 |
| True Care Cleaning Ltd | Administrative & support | 2025 |
| Truedecision Ltd | Wholesale & retail | 2025 |
| Truenest Housing Limited | Households | 2026 |
| Trunkway Logistics Ltd | Transport & logistics | 2026 |
| Trusty Car Keys Ltd | Wholesale & retail | 2024 |
| TS Enterprises Limited | Arts & recreation | 2012 |
| Tsiemee Company Limited | Health & social care | 2021 |
| Tsno Ltd | Transport & logistics | 2021 |
| TSS Transport Ltd | Wholesale & retail | 2022 |
| TT Raducanu Builders Limited | Construction | 2019 |
| Tulip Beauty Browbar Ltd | Other services | 2024 |
| Tume M SOT Limited | Wholesale & retail | 2008 |
| Tunlix IT Consulting Limited | Information & communication | 2011 |
| Turbojet Transport Ltd | Transport & logistics | 2026 |
| Turkish Razor K Oldbury Ltd | Other services | 2024 |
| Turner’S Marine Services Ltd | Transport & logistics | 2021 |
| Turpin and Flanders Limited | Extraterritorial | 2015 |
| Tuskers Care Solutions Limited | Administrative & support | 2023 |
| Twenty Seven Property Limited | Real estate | 2021 |
| TWENTY20 Recruitment (Midlands) Ltd | Administrative & support | 2019 |
| Twfx Ltd. | Information & communication | 2017 |
| Two Four Trading Limited | Professional & scientific | 2012 |
| Tylane Building Limited | Construction | 2026 |
| U B Prime Food Ltd | Wholesale & retail | 2026 |
| U G Properties Limited | Real estate | 2010 |
| UBF Holdings Ltd | Financial services | 2018 |
| UK Design Shed Limited | Wholesale & retail | 2024 |
| UK Free Trade Ltd | Manufacturing | 2023 |
| UK Home Improvements Ltd | Construction | 2024 |
| UK Label Converting Ltd | Manufacturing | 2025 |
| UK Labels (West Midlands) Limited | Manufacturing | 2011 |
| UK Nautical Supply Ltd | Wholesale & retail | 2026 |
| UK Polychain Ltd | Wholesale & retail | 2016 |
| UK Shop Fronts Ltd | Construction | 2014 |
| UK TECH32 Limited | Wholesale & retail | 2024 |
| UK Villa Properties Ltd | Real estate | 2016 |
| Ukas Motor Services Limited | Wholesale & retail | 2011 |
| Uktop IT Limited | Information & communication | 2011 |
| Ultimate Concepts Limited | Other services | 2007 |
| Ultimate Pixels Ltd | Administrative & support | 2019 |
| Ultra Marble Holdings Ltd | Administrative & support | 2020 |
| Ultra Marble Ltd | Manufacturing | 2020 |
| Unalome Ltd | Professional & scientific | 2019 |
| Unbound Engineering Ltd | Financial services | 2025 |
| Unbound Legacy Holdings Limited | Financial services | 2025 |
| Uncle's Crewing Services Limited | Arts & recreation | 2022 |
| Unda Premium Services Ltd | Health & social care | 2025 |
| Unddal Catering Limited | Hospitality | 2024 |
| Under Orders Limited | Arts & recreation | 2013 |
| UNI Hardware (UK) Limited | Extraterritorial | 2013 |
| UNI Property Maintenance Limited | Real estate | 2024 |
| United Utilities Trust Fund | Administrative & support | 2004 |
| Universal Boltforgers Limited | Manufacturing | 1980 |
| Uppal & Johal Properties Ltd | Real estate | 2024 |
| Uppal Sons Ltd | Construction | 2023 |
| Urban DS01 Ltd | Real estate | 2025 |
| Urban Trade Frames Ltd | Manufacturing | 2019 |
| Urbanize Electrical & Security Ltd | Construction | 2024 |
| US Candy King Ltd | Wholesale & retail | 2024 |
| USM Healthcare Ltd | Wholesale & retail | 2022 |
| USM Medical Services Ltd | Wholesale & retail | 2022 |
| V&K UK Service Limited | Transport & logistics | 2026 |
| V.K.Pillai Ltd | Wholesale & retail | 2012 |
| VA Partners Limited | Information & communication | 1997 |
| Valbourne Management Company Ltd | Households | 2019 |
| Valentine & Winthorpe Ltd | Financial services | 2024 |
| Valkyrie Arts Ltd | Arts & recreation | 2024 |