| Travel 247 Enterprise Ltd | Transport & logistics | 2025 |
| Travel City Limited | Administrative & support | 2015 |
| Travis Holdings Ltd | Professional & scientific | 2009 |
| Treacle.Me C.I.C. | Information & communication | 2020 |
| Tree House Bars Limited | Hospitality | 2020 |
| Tree Tech Arborist Limited | Agriculture & fishing | 2022 |
| Treehouse Bars Otley Ltd | Hospitality | 2022 |
| Trendy Home Treasures Ltd | Wholesale & retail | 2024 |
| TRI Synergy Consultancy Ltd | Professional & scientific | 2021 |
| Tribusuk Ltd | Administrative & support | 2018 |
| Trident Car Sales Ltd | Wholesale & retail | 2021 |
| Trident Engineering Supplies Ltd | Professional & scientific | 2025 |
| Tridon Emea Limited | Wholesale & retail | 2019 |
| Trinity Pathology Services LLP | | 2026 |
| Triple Glazing Ltd | Manufacturing | 2021 |
| Triple M ( Keighley ) Limited | Administrative & support | 2016 |
| Trixys Vape & Convenience Limited | Wholesale & retail | 2026 |
| Tropical Touch Beauty and Aesthetics Limited | Other services | 2025 |
| Tropical Touch Ltd | Other services | 2022 |
| True North Collective CIC | Health & social care | 2024 |
| True-View Cups Ltd | Extraterritorial | 2025 |
| Truebridge Ltd | Administrative & support | 2025 |
| Truepath Logistics Ltd | Transport & logistics | 2025 |
| Trustflow Cleaning Solutions Ltd | Administrative & support | 2025 |
| Trustheat Limited | Administrative & support | 2015 |
| TS Commercial Spray Finishing Ltd | Construction | 2025 |
| TSD Bourne 2021 Limited | Financial services | 2021 |
| TSD Uckfield 2021 Limited | Financial services | 2021 |
| TSL Builders Ltd | Construction | 2026 |
| Ttgoc Ltd | Financial services | 2020 |
| Tucos Silsden UK Limited | Hospitality | 2025 |
| Tuday's Bakary Limited | Hospitality | 2022 |
| Turkish Style Keighley Ltd | Other services | 2025 |
| Turn Key Services Limited | Construction | 2023 |
| Turner Land & Property Limited | Real estate | 2022 |
| Turners Garden Machinery Limited | Wholesale & retail | 2012 |
| Tutm Limited | Information & communication | 2019 |
| TW Design & Management Ltd | Professional & scientific | 2026 |
| Twelve & Twelve Ltd | Other services | 2012 |
| Twigg Investments Ltd | Real estate | 2019 |
| Twin AI Ltd | Information & communication | 2025 |
| Twinkle Toes Nursery (Selby) Ltd | Health & social care | 2025 |
| Twins&Co Limited | Professional & scientific | 2019 |
| Two Tons Limited | Agriculture & fishing | 2024 |
| Tyke Breweries Limited | Hospitality | 2014 |
| Typical Type Events Limited | Administrative & support | 2023 |
| U Train Services Limited | Administrative & support | 2017 |
| U15 CIE Ltd | Administrative & support | 2020 |
| UAV Studio Ltd | Information & communication | 2021 |
| UB Build&Fix Ltd | Construction | 2025 |
| UFA Ltd | Real estate | 2017 |
| UK Escalator Solutions Limited | Construction | 2016 |
| UK Fried Chicken (Keighley) Ltd | Hospitality | 2019 |
| UK Fried Chicken KLY Ltd | Hospitality | 2026 |
| UK Heat Pump Experts Ltd | Wholesale & retail | 2025 |
| UK Hybrid Autocentre Ltd | Wholesale & retail | 2023 |
| UK Immigrationz Services Ltd | Professional & scientific | 2024 |
| UK Kefirek Store Ltd | Wholesale & retail | 2025 |
| UK Largest Eco Grant Provider Ltd | Professional & scientific | 2024 |
| UK Lifts Limited | Construction | 2019 |
| UK Mini Marke Ltd | Wholesale & retail | 2025 |
| UK Pyrotechnics Society | Other services | 2006 |
| UK Seamless Gutters & Joinery Limited | Construction | 2018 |
| UK Swim Stars LLP | | 2017 |
| UK Trade Stairlifts Ltd | Professional & scientific | 2022 |
| UK Travel & Money Transfer Limited | Professional & scientific | 2024 |
| UK Trax Facilities Ltd | Transport & logistics | 2025 |
| Uk-Medcare Ltd | Health & social care | 2025 |
| Ukfc Keighley Ltd | Hospitality | 2023 |
| Ultimate (Commercial Interiors) Limited | Construction | 2000 |
| Ultimate Fit OUT Furniture & Design Ltd | Extraterritorial | 2014 |
| Ultimate Flooring Ltd | Construction | 2020 |
| Ultragraphics Limited | Manufacturing | 2005 |
| Ultravac Limited | Administrative & support | 2018 |
| Umar Ayub Ltd | Health & social care | 2017 |
| Uncle Sal's Ltd | Hospitality | 2023 |
| Unicorn Stairlifts Limited | Construction | 2003 |
| Unified Design Ltd | Manufacturing | 2021 |
| Union Star Ltd | Manufacturing | 2007 |
| Union Taekwondo ENG CIC | Education | 2025 |
| Unionmill Limited | Real estate | 1990 |
| Unique Cheer and Dance Ltd | Education | 2022 |
| Unique Finesse Ltd | Construction | 2024 |
| Unistyle Ltd | Wholesale & retail | 2018 |
| Unit 4 Garage Services Ltd | Wholesale & retail | 2024 |
| United Heating Solutions Limited | Construction | 2021 |
| United Kingdom Global Sourcing Group Limited | Manufacturing | 2024 |
| United Landscaping Solutions Limited | Professional & scientific | 2025 |
| United Mobile Zone Ltd | Wholesale & retail | 2012 |
| United Ummah Ltd | Construction | 2022 |
| Universal A.V. Services Limited | Administrative & support | 1990 |
| Universal General Trading Ltd | Wholesale & retail | 2026 |
| Universal Group Holdings Limited | Professional & scientific | 2015 |
| Universal Horizon Ltd | Information & communication | 2020 |
| Universal Live Limited | Information & communication | 2008 |
| Unlid Limited | Other services | 2020 |
| Upflare Ltd | Wholesale & retail | 2025 |
| Upgrade Windows (Burnley) Ltd | Construction | 2002 |
| UR Performance Limited | Information & communication | 2018 |
| Urban Estate Agents Ltd | Real estate | 2023 |