| Tudor Network & IT Services Ltd | Information & communication | 2018 |
| Turley & Turley Limited | Financial services | 2002 |
| Two Thousand Holdings Ltd | Real estate | 2025 |
| TY Property Investments Ltd | Real estate | 2022 |
| UGO Management Ltd | Professional & scientific | 2018 |
| UK Driver CPC Consortium Limited | Education | 2022 |
| UK Loft Rooms Limited | Construction | 2020 |
| UK Prime Medical Ltd | Education | 2026 |
| Ukcil Limited | Information & communication | 2018 |
| Ultimate Fire and Security Systems Limited | Administrative & support | 2012 |
| Ultimate Roofing Services Limited | Construction | 2024 |
| Umeed Ventures Limited | Information & communication | 2024 |
| Unique M Limited | Health & social care | 2015 |
| Unishare Limited | Financial services | 2016 |
| Unit 2 Curtain Road (2018) Ltd | Real estate | 2018 |
| Unit 2 Curtain Road Ltd | Real estate | 2013 |
| Universal Lifting Hire Services Limited | Construction | 2016 |
| Unkempt Limited | Arts & recreation | 2021 |
| Upnorf Trading Ltd | Wholesale & retail | 2024 |
| Upper Green Ltd | Hospitality | 2023 |
| Upper Park Road Belvedere (North) Limited | Households | 1981 |
| Upper Park Road Belvedere (West) Limited | Households | 1981 |
| Upward Court Residents Association Limited | Households | 1997 |
| Urban Property Limited | Real estate | 2003 |
| Usher HR Consultants Ltd | Professional & scientific | 2011 |
| VA Central Europe Limited | Professional & scientific | 2025 |
| VA Central Ltd | Professional & scientific | 2021 |
| Valhalla Scent Ltd | Wholesale & retail | 2022 |
| Vanguard Roofs Ltd | Construction | 2025 |
| Vehicleflex Contracts Limited | Administrative & support | 2019 |
| Vehicleflex Limited | Administrative & support | 2016 |
| Vengeance 249 Ltd | Information & communication | 2016 |
| Vernod Holdings Limited | Professional & scientific | 2003 |
| Very Good Software Co. Limited | Information & communication | 2017 |
| Vesaro Limited | Other services | 2011 |
| Victoria Park Villas Limited | Households | 2005 |
| Viero UK Limited | Wholesale & retail | 2007 |
| Vincola Ltd | Professional & scientific | 2020 |
| Vine Consultant Services Ltd | Construction | 2017 |
| Vision Entertainments London Limited | Administrative & support | 2006 |
| Visionpath Education Limited | Education | 2011 |
| Visionpath Group Limited | Professional & scientific | 2025 |
| Vivid Minds Events Limited | Administrative & support | 2010 |
| Vlamingo Ltd | Information & communication | 2024 |
| Voyage Inns Investments Ltd | Real estate | 2017 |
| Voyage Inns Ltd | Hospitality | 2017 |
| Vspj Services Limited | Information & communication | 2016 |
| VTE Network Services Ltd | Information & communication | 2020 |
| VTY Property Investments Limited | Real estate | 2024 |
| VZS Properties Limited | Real estate | 2025 |
| W. Reilly Ltd. | Construction | 1994 |
| Wafi Limited | Information & communication | 2025 |
| Walking Digital Limited | Professional & scientific | 2016 |
| Wanderluxe Travel Ltd | Administrative & support | 2020 |
| Waqas Mechanical Ltd | Construction | 2025 |
| Waste World Limited | Water & waste | 2001 |
| Waters Hart Ltd | Professional & scientific | 2017 |
| Watertight Roofing Solutions Ltd | Construction | 2024 |
| Waterworld Plumbing & Heating Ltd | Professional & scientific | 2009 |
| Webb IT Consulting Ltd | Information & communication | 2018 |
| Webrica Ltd | Information & communication | 2025 |
| Wellbeing Works Partnership CIC | Other services | 2021 |
| Wells Catering Ltd | Hospitality | 2025 |
| Wells' Restaurants Ltd | Hospitality | 2018 |
| Wentworth Fairways Limited | Real estate | 2010 |
| White Dog Accounting Limited | Professional & scientific | 2014 |
| White Hart Properties Limited | Real estate | 2020 |
| White HAT Trades Construction Ltd | Administrative & support | 2025 |
| White HAT Trades Ltd | Administrative & support | 2019 |
| White Island Property Management Ltd | Households | 2024 |
| White Rose Property Management (SY) Limited | Households | 2019 |
| White Rose Property Management Doncaster Limited | Households | 2025 |
| Whizz Autos Ltd | Wholesale & retail | 2023 |
| Wild Grey Developments Ltd | Construction | 2020 |
| Wilkins Farms Limited | Real estate | 2021 |
| Wilkins Fine Foods Ltd | Hospitality | 2022 |
| William FOX Recruitment Ltd | Other services | 2018 |
| William Francis Investments Ltd | Real estate | 2019 |
| Willowmead (Sawbridgeworth) Management Company Limited | Households | 1977 |
| Wizard Worx Automotion Ltd | Wholesale & retail | 2020 |
| Wolf Plant Hire Limited | Administrative & support | 2000 |
| Woodberry London Limited | Manufacturing | 2020 |
| Woodland House Limited | Construction | 2025 |
| Woodlands Tree Specialists Limited | Administrative & support | 2025 |
| Woodstock Foods (UK) Limited | Wholesale & retail | 2007 |
| Woodstock Foods LLP | | 2002 |
| Wordpress Website Builders UK Limited | Information & communication | 2017 |
| Working Title HR Limited | Administrative & support | 2016 |
| Workplace Resolutions Ltd | Administrative & support | 2019 |
| World Beers Limited | Wholesale & retail | 2011 |
| World of Reptiles and Exotics Essex Limited | Wholesale & retail | 2020 |
| Wrens Court Management Limited | Households | 1984 |
| Wright Digital Solutions Ltd | Wholesale & retail | 2016 |
| X-Clusive Event Services Limited | Administrative & support | 2022 |
| XO Student Discounts Limited | Information & communication | 2019 |
| YEW Store & Landscape Ltd | Administrative & support | 2025 |
| Yorkshire Lifting Tackle Limited | Manufacturing | 1980 |
| Your Investment Limited | Real estate | 2022 |
| Your Perfect Travel Limited | Administrative & support | 2015 |
| ZFL Estates Ltd | Real estate | 2019 |