| TSM Sports Ltd | Other services | 2019 |
| TT Surgical Instruments Ltd | Manufacturing | 2024 |
| TT Turner Limited | Transport & logistics | 2004 |
| Tuite Solutions Limited | Professional & scientific | 2024 |
| Turnpost Media Ltd | Professional & scientific | 2012 |
| Ty-N DON Caravan Park Limited | Hospitality | 2019 |
| Tyldesley Tyre & Exhausts Limited | Wholesale & retail | 2001 |
| Tzedekk Limited | Administrative & support | 2016 |
| UK Health Kits Ltd | Health & social care | 2021 |
| UK Mortgage Corporation Limited | Financial services | 1989 |
| Ukos Consulting Limited | Real estate | 2021 |
| Unit Consultancy Group Ltd | Administrative & support | 2020 |
| United Television Networks Limited | Financial services | 2019 |
| Unity Cloth Cutting Machines Ltd | Administrative & support | 2006 |
| Upward Estates Ltd | Financial services | 2021 |
| Usama Mart Ltd | Wholesale & retail | 2026 |
| VAV Associates Limited | Professional & scientific | 2009 |
| Verwer Training & Consultancy Limited | Professional & scientific | 2008 |
| Vibecity Trading Limited | Wholesale & retail | 2026 |
| Viramart Ltd | Wholesale & retail | 2026 |
| Vision Brands Ltd | Wholesale & retail | 2022 |
| Vixen Energy Limited | Wholesale & retail | 2021 |
| Wags and Whiskers Colne Ltd | Wholesale & retail | 2012 |
| Wakefields Nottingham Ltd | Construction | 2009 |
| Waqf International Ltd | Construction | 2023 |
| Ward Mobility Limited | Wholesale & retail | 2013 |
| Wardrobe Collections Ltd | Wholesale & retail | 2014 |
| Warmfield Company Limited(The) | Wholesale & retail | 1924 |
| Warrior PT Ltd | Arts & recreation | 2026 |
| Water 24-7 Limited | Wholesale & retail | 2011 |
| Watkins Nurseries (Holdings) Limited | Financial services | 2017 |
| Watkins'Nurseries,Limited | Hospitality | 1947 |
| Wave Fusions Ltd | Wholesale & retail | 2023 |
| WE Buy Waste OIL Ltd | Water & waste | 2011 |
| West & Senior Limited | Manufacturing | 1952 |
| Westfield Management (Beverley) Limited | Real estate | 1988 |
| Westshield Limited | Construction | 1977 |
| Whimsical Global Ltd | Wholesale & retail | 2026 |
| Wigan Pizza Ltd | Hospitality | 2024 |
| Wilberton Group Ltd | Wholesale & retail | 2022 |
| Willan UK Limited | Professional & scientific | 1994 |
| William Reynolds Property Management Ltd | Real estate | 2024 |
| Willow Gardens Entertainment Ltd | Hospitality | 2014 |
| Woody Corner Management Company Limited | Households | 2006 |
| Worth Holdings (UK) Ltd | Financial services | 2025 |
| Wovenhill Ltd | Wholesale & retail | 2001 |
| Wydeopen Limited | Financial services | 2014 |
| Xavirix Ltd | Wholesale & retail | 2026 |
| Xeikon (UK) Limited | Manufacturing | 2003 |
| Xeikon Limited | Information & communication | 2005 |
| Xen@Co Limited | Information & communication | 2007 |
| Yamsilver Ltd | Professional & scientific | 2006 |
| Yifan Nairn Coaching Ltd | Education | 2022 |
| Ymyounas Limited | Wholesale & retail | 2026 |
| YY Medical Ltd | Health & social care | 2020 |
| Zavision Store Limited | Wholesale & retail | 2026 |
| Zenexa Ltd | Health & social care | 2025 |
| Zero Entropy Networks Limited | Professional & scientific | 2010 |
| Zeta Consults Ltd | Professional & scientific | 2017 |
| Zeta Group of Companies Limited | Financial services | 2019 |
| Zevon Store Limited | Wholesale & retail | 2026 |
| Zuff Fire Limited | Public administration | 2025 |