| Two Newts Sticker Co. Ltd | Manufacturing | 2022 |
| Two Stout MEN Ltd | Hospitality | 2025 |
| Twogether Holdings Ltd | Education | 2026 |
| Twyford Motor Company Ltd | Wholesale & retail | 2018 |
| Txid Limited | Information & communication | 2023 |
| Tyche Consultancy Services Limited | Financial services | 2025 |
| Tydee Ltd | Administrative & support | 2024 |
| Tye-D Electrics Ltd | Construction | 2019 |
| Tyler Jarrams Ltd | Construction | 2019 |
| Tymon Commercial Services Limited | Professional & scientific | 2015 |
| Tyre Control Ltd | Administrative & support | 2023 |
| Tyremark Holidays Ltd | Administrative & support | 2023 |
| Tyseley Motorcycles Ltd | Wholesale & retail | 2022 |
| TZA Consultancy Ltd | Professional & scientific | 2023 |
| TZK Tech Group Ltd | Manufacturing | 2026 |
| U Marketing Limited | Wholesale & retail | 2019 |
| U Soft Solutions Limited | Information & communication | 2011 |
| U.C.A.M. Services Limited | Administrative & support | 2019 |
| U.P.V.C.WINDOWS@DOORS-2-GO Limited | Other services | 2006 |
| UA Estates Limited | Real estate | 2021 |
| UA Training Services Ltd | Arts & recreation | 2025 |
| UB Healthcare Ltd | Health & social care | 2022 |
| Ubakemehappy Limited | Manufacturing | 2025 |
| Uber Security Limited | Information & communication | 2014 |
| UE Construction Ltd | Construction | 2020 |
| Ugch Limited | Financial services | 2023 |
| UGX Limited | Financial services | 2024 |
| UK Banners & Display Limited | Professional & scientific | 2010 |
| UK Business Solution Limited | Other services | 2019 |
| UK Degrees Ltd | Education | 2025 |
| UK Empire Group Limited | Wholesale & retail | 2023 |
| UK Europla Ltd | Wholesale & retail | 2022 |
| UK Finance Partners Ltd | Professional & scientific | 2021 |
| UK Homebuyers Ltd | Real estate | 2013 |
| UK Intermedicals Limited | Health & social care | 2023 |
| UK Land Development Ltd | Real estate | 2022 |
| UK Logistic Expert Ltd | Other services | 2021 |
| UK M&E Ltd | Construction | 2017 |
| UK Meats Limited | Wholesale & retail | 1995 |
| UK MSK Medical Ltd | Health & social care | 2025 |
| UK Nomadcare Ltd | Financial services | 2025 |
| UK Official Services Limited | Extraterritorial | 2013 |
| UK Padel Spaces Ltd | Construction | 2026 |
| UK Penny Press Limited | Wholesale & retail | 2010 |
| UK Salon Finders Ltd | Other services | 2024 |
| Uk-Central (Solihull) Limited | Real estate | 2014 |
| Uk-Internationaldance Ltd | Arts & recreation | 2022 |
| Ukpm Ltd | Real estate | 2021 |
| Ultima Business Consultants Limited | Professional & scientific | 2013 |
| Ultimate Finish Limited | Wholesale & retail | 2010 |
| Ultimate Gold Limited | Wholesale & retail | 2026 |
| Ultimate Physio Ltd | Health & social care | 2017 |
| Ultimate Precision Ltd | Professional & scientific | 2024 |
| Ultra H C Limited | Other services | 2021 |
| Ultrasound First Limited | Health & social care | 2010 |
| UM Housing Group Ltd | Hospitality | 2025 |
| Umaima Limited | Hospitality | 2019 |
| Umberslade (Headlands) Limited | Real estate | 2007 |
| Umberslade Business Services Limited | Construction | 2002 |
| Umberslade Corporate Management Limited | Professional & scientific | 1971 |
| Umberslade Diamond Drilling & Sawing Ltd | Construction | 2025 |
| Umberslade Groundworks Limited | Construction | 2016 |
| Umberslade Group Limited | Extraterritorial | 2007 |
| Umberslade Holdings Limited | Financial services | 2016 |
| Umberslade Park Limited | Administrative & support | 2009 |
| Umberslade Pizzeria Ltd | Hospitality | 2022 |
| Umberslade Plant Hire Limited | Administrative & support | 2016 |
| Umberslade Securities Limited | Real estate | 1987 |
| Umberslade Southern Limited | Construction | 2021 |
| Umberslade Wapping Wharf (Zulu) Limited | Extraterritorial | 2007 |
| Umbrella Events Group Limited | Construction | 2018 |
| Umbrella Plastering Limited | Construction | 2022 |
| Umzi Housing Ltd | Real estate | 2025 |
| Umzi Ltd | Information & communication | 2017 |
| Uneek Holidays (UK) Ltd | Administrative & support | 2025 |
| Uni-Que Lettings Ltd | Real estate | 2018 |
| Unicorn Business Solutions Limited | Information & communication | 2012 |
| Unielectronics Ltd | Wholesale & retail | 2007 |
| Unify Housing Ltd | Hospitality | 2023 |
| Unify Resin and Landscapes Ltd | Construction | 2024 |
| Uniguard Cleaning Services Ltd | Administrative & support | 2022 |
| Uniguard Group Ltd | Financial services | 2022 |
| Uniguard Property Ltd | Real estate | 2024 |
| Uniguard Security Ltd | Administrative & support | 2019 |
| Uniguard Training Ltd | Administrative & support | 2024 |
| Union Golf Limited | Wholesale & retail | 2012 |
| Uniq Giftbox Ltd | Wholesale & retail | 2024 |
| Unique Dining Group Ltd. | Administrative & support | 2016 |
| Unique Understanding Limited | Education | 2014 |
| Unique Venue Finders Limited | Hospitality | 2011 |
| Unit 1 Olton Bridge Limited | Households | 2018 |
| Unit Test Limited | Financial services | 2018 |
| Unite & Uplift Together C.I.C. | Arts & recreation | 2019 |
| Unite Lettings Ltd | Real estate | 2021 |
| United Capital Investments London Limited | Financial services | 2016 |
| United Contracts Midlands Limited | Construction | 2023 |
| United Supply Chain Solutions Limited | Transport & logistics | 2024 |
| Unity Homes Group Ltd | Real estate | 2026 |
| Universal Credit Limited | Financial services | 1986 |
| Universal Green Distribution UK Ltd | Wholesale & retail | 2022 |