| Vukuzimele Ltd | Health & social care | 2019 |
| Vulcanhall Limited | Construction | 1998 |
| VVO Gulei Ltd | Construction | 2019 |
| VXD Ltd | Professional & scientific | 2011 |
| Vyaas Sriman Ltd | Real estate | 2020 |
| Vybra Solutions Ltd | Wholesale & retail | 2016 |
| Vybz Thyme Ltd | Hospitality | 2022 |
| Vynova Runcorn Limited | Manufacturing | 2014 |
| Vytautas Ltd | Transport & logistics | 2016 |
| Vytech Solutions Limited | Manufacturing | 2015 |
| V’S Autos MK Ltd | Wholesale & retail | 2023 |
| W B Ventures Limited | Financial services | 2011 |
| W Burr Engineering Services Limited | Manufacturing | 2017 |
| W G Gooch Limited | Wholesale & retail | 2025 |
| W T Seymour Limited | Extraterritorial | 1946 |
| W&A Estates Ltd | Real estate | 2026 |
| W&B Global Holdings Ltd | Financial services | 2025 |
| W&B World Ventures Ltd | Financial services | 2025 |
| W&G International Trade Ltd | Wholesale & retail | 2025 |
| W&S Construction UK Ltd | Construction | 2025 |
| W.E. D&B Ltd | Construction | 2025 |
| W.G.Wright (Auto Electrical) Limited | Real estate | 1962 |
| W.H. Barley (Transport and Storage) Limited | Transport & logistics | 1981 |
| W.H. Barley Group Limited | Transport & logistics | 2015 |
| W.T. Bates and SON Limited | Professional & scientific | 1987 |
| W1 Close Protection Ltd | Administrative & support | 2023 |
| W2GO Limited | Professional & scientific | 2014 |
| W3 Partnership Limited | Information & communication | 2007 |
| WAAM3D Employee Benefit Trust Limited | Administrative & support | 2025 |
| WAAM3D Limited | Administrative & support | 2018 |
| Wabbit Creations Ltd | Wholesale & retail | 2022 |
| Wabsas Limited | Health & social care | 2022 |
| Wadworth Consulting Ltd | Professional & scientific | 2015 |
| Wafaz Private Ltd | Health & social care | 2012 |
| Waffleicious Limited | Wholesale & retail | 2023 |
| Waggin and Walkin Limited | Other services | 2014 |
| Waggy Tales Ltd | Extraterritorial | 2019 |
| Wagyu Big MAC Ltd | Wholesale & retail | 2025 |
| Waheed Recovery Ltd | Wholesale & retail | 2025 |
| Wahid Archery Limited | Education | 2025 |
| Wainwright Scott Limited | Professional & scientific | 2011 |
| Wairimu Limited | Health & social care | 2025 |
| Wake UP Consulting Limited | Information & communication | 2011 |
| Walden Associates Limited | Professional & scientific | 2004 |
| Walden Croft (Milton Keynes) Freehold Limited | Households | 2020 |
| Walk OUT Wardrobe MK Ltd | Extraterritorial | 2023 |
| Walk With Williams Limited | Administrative & support | 2019 |
| Walker Autos MK Ltd | Wholesale & retail | 2018 |
| Walker Motorsport Components Ltd | Manufacturing | 2015 |
| Walker Renovations MK Ltd | Construction | 2025 |
| Walker Rentals Ltd | Real estate | 2018 |
| Walker Transport Ltd | Transport & logistics | 2026 |
| Wallace Hanover Strategic Consultancy Ltd | Information & communication | 2021 |
| Walledwell Limited | Real estate | 2025 |
| Wallis Dolphin Ltd | Professional & scientific | 2012 |
| Wallisee Bookkeeping and Accounting Service Limited | Professional & scientific | 2016 |
| Walnut Pet Supplies Limited | Wholesale & retail | 2001 |
| Walnut Tree Community Shop Ltd | Wholesale & retail | 1998 |
| Walnut Tree Editing Limited | Administrative & support | 2012 |
| Walnut Tree Leather Limited | Wholesale & retail | 2016 |
| Walnuts Care Ltd | Education | 2011 |
| Walpole Holdings Limited | Real estate | 2019 |
| Walpole Limited | Hospitality | 2017 |
| Walrej Ltd | Wholesale & retail | 2022 |
| Walter Construction Limited | Construction | 2026 |
| Walton Community Facilities | Real estate | 1995 |
| Walton Holdings Limited | Professional & scientific | 2005 |
| Walton LEP Housing Limited | Other services | 2009 |
| Walton Management Company (Milton Keynes) Limited | Construction | 2025 |
| WAN LI GEN Ltd. | Wholesale & retail | 2025 |
| Wannahookup Limited | Administrative & support | 2025 |
| Wanshi Catering Group Limited | Professional & scientific | 2019 |
| Want IT Limited | Wholesale & retail | 2015 |
| WAP Partners Limited | Hospitality | 2011 |
| Waran Holdings Group Limited | Financial services | 2024 |
| Warburg Developments Limited | Construction | 2018 |
| Ward Bros (Durham) Limited | Construction | 1971 |
| Ward I.T. Training Solutions Limited | Professional & scientific | 2003 |
| Ward-Baker Media Limited | Professional & scientific | 2014 |
| Warehouse Racking Inspection & Safety Training Services Ltd | Other services | 2022 |
| Wargames Workshop Ltd | Wholesale & retail | 2014 |
| Warm & Safe Limited | Construction | 2016 |
| Warm Life Limited | Other services | 2020 |
| Warmair Ltd | Administrative & support | 2016 |
| Warna Consulting Ltd | Professional & scientific | 2026 |
| Warna Limited | Information & communication | 2007 |
| Warner Planning Limited | Professional & scientific | 2020 |
| Warramill Limited | Administrative & support | 2007 |
| Warren Chambers Consulting Limited | Professional & scientific | 2021 |
| Warren House Employee Benefits Limited | Administrative & support | 2023 |
| Warren Wealth Management Ltd | Financial services | 2023 |
| Warrenbank Freehold Limited | Households | 2017 |
| Warrenshaw (2000) Limited | Agriculture & fishing | 1999 |
| Warrior Craft Ltd | Professional & scientific | 2008 |
| Warriors Boxing Ltd | Arts & recreation | 2019 |
| Warsap Consulting Limited | Information & communication | 2018 |
| Wartens Ltd | Professional & scientific | 2023 |
| Warwick Analytics Services Ltd | Information & communication | 2020 |
| Warwick Glazing Ltd | Construction | 2025 |
| Warwick Rowers Limited | Extraterritorial | 2016 |