| Verwood Ltd | Arts & recreation | 2020 |
| Veya Ltd | Real estate | 2025 |
| VFM Trade Meat Warehouse Limited | Wholesale & retail | 2004 |
| View 62 Ltd | Hospitality | 2024 |
| Vigilosec Ltd | Information & communication | 2025 |
| Vincent Commercial Services Ltd | Professional & scientific | 2014 |
| Vintage Simplicity Ltd | Wholesale & retail | 2025 |
| Vintage Vows Ltd | Other services | 2024 |
| Vinylize Printing & Embroidery Ltd | Administrative & support | 2020 |
| VIP Shop Limited | Wholesale & retail | 2025 |
| Virasat Properties Ltd | Real estate | 2026 |
| Virgo Consultancy Services Limited | Arts & recreation | 2008 |
| Virgo Creative Services Ltd | Education | 2023 |
| Virtually Legal Limited | Professional & scientific | 2007 |
| Vision Catalyst Fund | Information & communication | 2020 |
| Vistamar RTM Company Limited | Households | 2024 |
| Vive Hosting Ltd | Information & communication | 2024 |
| Vivo Bookkeeping and Accounts Ltd | Professional & scientific | 2024 |
| VOG Fire & Security Ltd | Administrative & support | 2014 |
| VOG Garden Services Ltd | Wholesale & retail | 2024 |
| Volga Management Ltd | Administrative & support | 2021 |
| VR Property Investments Limited | Real estate | 2021 |
| VRC Holdings Ltd | Financial services | 2021 |
| Vrettmac Safety Limited | Professional & scientific | 2013 |
| Vulcan Systems Ltd | Manufacturing | 2021 |
| W Mullett Limited | Construction | 1961 |
| W.F. Holmes & Sons Limited | Wholesale & retail | 1963 |
| W2 Commercial Limited | Professional & scientific | 2014 |
| Wallis Construction SW Ltd | Construction | 2023 |
| Wanderlust Journeys Ltd | Administrative & support | 2019 |
| Wardle (Painters) Limited | Construction | 1965 |
| Washington Design Consultants Limited | Professional & scientific | 1997 |
| Washington Security Ltd | Administrative & support | 2026 |
| Waszczuk Digital Ltd | Information & communication | 2018 |
| Watch Enterprise Ltd | Wholesale & retail | 2018 |
| Waterfront Carpentry Limited | Construction | 2012 |
| Watson’S Logistics (Wales) Ltd | Transport & logistics | 2022 |
| Watts Air Conditioning Ltd | Manufacturing | 2008 |
| Wavelength Wealth Ltd | Real estate | 2015 |
| Wayside Property Center (Wales) Limited | Real estate | 2022 |
| Wayside Service Center Limited | Wholesale & retail | 2014 |
| WE ARE Apex Ltd | Information & communication | 2020 |
| WEALHAS5SWHEELCHAIRRUGBYUNION CYF. | Arts & recreation | 2024 |
| Webb & GEE Ltd | Wholesale & retail | 2023 |
| Webble, Webble & Torrie Limited | Hospitality | 2025 |
| Webjects Limited | Information & communication | 2016 |
| Weir & Sheekey Limited | Real estate | 2023 |
| Welcome Home Properties Limited | Real estate | 2014 |
| Well Chain Ltd | Wholesale & retail | 2025 |
| Well Women CIC | Health & social care | 2025 |
| Wellbeing, Hearing and Balance Limited | Health & social care | 2020 |
| Wellbray Limited | Health & social care | 2020 |
| Welsh Airgun Association Limited | Arts & recreation | 2010 |
| West Court (Barry) Limited | Households | 1981 |
| West Cross Properties Limited | Real estate | 1996 |
| West END Training Limited | Professional & scientific | 1994 |
| West Hall Services Limited | Households | 2003 |
| West Quay Property Management Limited | Administrative & support | 2012 |
| Westcross Investments Limited | Real estate | 2006 |
| Westcross Properties (Barry) Ltd | Real estate | 2017 |
| Western Fitness Limited | Extraterritorial | 1996 |
| Western Forecourt Services Ltd | Professional & scientific | 2017 |
| White Lion Logistics Limited | Administrative & support | 2022 |
| White Water Marine Ltd | Wholesale & retail | 2023 |
| Whitmore Cardiff Ltd | Administrative & support | 2022 |
| Whitmore Stores Limited | Wholesale & retail | 2026 |
| Wild and RAW Ltd | Wholesale & retail | 2025 |
| Wildfire Cymr Productions Community Interest Company | Information & communication | 2025 |
| Wildwales Seeds Limited | Wholesale & retail | 2020 |
| Wiley Coast Services Ltd | Other services | 2020 |
| William Anthony Estates Ltd | Real estate | 2020 |
| Willow Garden Construction Ltd | Administrative & support | 2021 |
| Willowmere Home Care Agency Limited | Health & social care | 2010 |
| Wilson Brothers Property Limited | Households | 2022 |
| Window Cleaning Warehouse Limited | Wholesale & retail | 2004 |
| Window World Trade Limited | Construction | 2011 |
| Windy Nook Solutions Limited | Professional & scientific | 2023 |
| Wishy Washy Services Ltd | Administrative & support | 2023 |
| Wizard Engineering Limited | Extraterritorial | 2019 |
| WJ Construction and Carpentry Ltd | Manufacturing | 2022 |
| Wombie Ltd | Administrative & support | 2026 |
| Woodlands Court Management (Barry) Limited | Real estate | 2001 |
| Wqpm Limited | Administrative & support | 2021 |
| Wride Engineering Limited | Other services | 2018 |
| WTL WL Ltd | Hospitality | 2025 |
| WW3 Developments Ltd | Real estate | 2024 |
| Wynter Isabelle Bridal Ltd | Wholesale & retail | 2021 |
| X9X Ltd | Professional & scientific | 2025 |
| Xieni Limited | Hospitality | 2019 |
| Xtreme Edges Hockey Ltd | Education | 2021 |
| Y and Kian Limited | Other services | 2026 |
| Y Cerigos (5-16) RTM Company Limited | Households | 2022 |
| Y Cerigos (1-4) RTM Company Limited | Households | 2022 |
| Y Cerigos (17-20) RTM Company Limited | Households | 2022 |
| Yamini Properties Ltd | Real estate | 2026 |
| Yihang Limited | Hospitality | 2024 |
| YK Global Solutions Ltd | Real estate | 2025 |
| Ynys Y Grug Ltd | Health & social care | 2016 |
| Young Mortgage and Protection Ltd | Financial services | 2020 |
| Your Best Car Wash Ltd | Administrative & support | 2024 |