| Thetorchsite Ltd | Wholesale & retail | 2012 |
| Thomas and Andrew Botanix Limited | Agriculture & fishing | 2020 |
| Thomas Belmont Limited | Wholesale & retail | 2014 |
| Three Parishes for the Common Good CIC | Other services | 2019 |
| Tippins Orchard Management Company Limited | Households | 2024 |
| Tipsgrove Eco Ltd | Energy | 2017 |
| TIR Wilding Limited | Hospitality | 2026 |
| TOM Kendrick Design Limited | Information & communication | 2022 |
| Touchstones Therapies Limited | Health & social care | 2015 |
| Towanderuk Ltd | Administrative & support | 2020 |
| Trewythen Hotel Limited | Hospitality | 2012 |
| Trimast Systems Limited | Information & communication | 2003 |
| TTP Performance Limited | Wholesale & retail | 2023 |
| Twin Peaks Limited | Arts & recreation | 1996 |
| Tyseren Property Management Limited | Water & waste | 2002 |
| UK Prototype Ltd | Manufacturing | 2019 |
| UK RC Tech Limited | Wholesale & retail | 2024 |
| Unders Investments Ltd | Financial services | 2021 |
| Untold Histories Travel (International) Ltd | Extraterritorial | 2021 |
| Untold Histories Travel Ltd | Administrative & support | 2021 |
| Upper WYE Farmers Group C.I.C. | Agriculture & fishing | 2026 |
| Vcla Heritage Ltd | Professional & scientific | 2019 |
| Vegan Hair Hub Ltd | Wholesale & retail | 2021 |
| Victoria Arcade Management Company Limited | Households | 2024 |
| Virtual Centre for Late Antiquity | Professional & scientific | 2017 |
| Wagent Consulting Limited | Professional & scientific | 2025 |
| Waste Dynamics Limited | Administrative & support | 2003 |
| Watson's ALE House Limited | Hospitality | 2017 |
| Waunddu Poultry Ltd | Wholesale & retail | 2025 |
| Wayne Price Plumbing & Heating Limited | Construction | 2013 |
| Welsh Perry and Cider Society Ltd | Other services | 2006 |
| Went's Heating Services Ltd | Construction | 2023 |
| Went's Logistics Ltd | Transport & logistics | 2018 |
| West & East Shop Ltd | Wholesale & retail | 2025 |
| West Wales Restoration Ltd | Construction | 2007 |
| Western Risk Limited | Professional & scientific | 2026 |
| Weston Bar (Wales) Limited | Hospitality | 2010 |
| Weymouth Motor Racing Club Limited | Arts & recreation | 1974 |
| Wharfe Vegas Motors Ltd | Professional & scientific | 2021 |
| Whitchurch P.O. Limited | Transport & logistics | 2026 |
| Wicksit Ltd | Extraterritorial | 2021 |
| Wilba Conservation Limited | Agriculture & fishing | 2022 |
| Wild Primrose Investments Ltd | Financial services | 2021 |
| Wilder Pentwyn Produce Limited | Agriculture & fishing | 2023 |
| Williams Transport Services Limited | Transport & logistics | 2019 |
| Worlds Biggest Bouncy Castle Ltd | Administrative & support | 2019 |
| Worth Your Salt Limited | Hospitality | 2018 |
| Write Word Publishing Limited | Information & communication | 2024 |
| WTC Transmissions Limited | Professional & scientific | 2001 |
| WYE Valley Housing Ltd | Construction | 2012 |
| Wyevale Properties Limited | Real estate | 2025 |
| Ynyslas Boatyard LLP | | 2009 |
| York Autograss Club Limited | Arts & recreation | 1995 |
| Ysbrydoli C.B.C. | Information & communication | 2024 |
| Ystrad Residents Management Limited | Households | 2008 |
| YZ Aesthetics and Bespoke Beauty Academy Limited | Other services | 2019 |
| Zeera UK Restaurant Ltd | Hospitality | 2025 |