| Wolverton GIN Limited | Manufacturing | 2022 |
| Wolverton Leisure Trading Ltd | Hospitality | 2013 |
| Wolverton Leisure Trust | Arts & recreation | 2001 |
| Wolverton Masonic Hall Limited | Real estate | 2008 |
| Wolverton Solutions Limited | Information & communication | 2025 |
| Wolverton Store MK Ltd | Wholesale & retail | 2022 |
| Woman Rise Limited | Manufacturing | 2020 |
| Woman to Woman Ministries Ltd | Professional & scientific | 2019 |
| Women in Leadership Retreat CIC | Hospitality | 2025 |
| Women's Wheelz Taxis Ltd | Transport & logistics | 2025 |
| Wondena Limited | Arts & recreation | 1998 |
| Wonder Incense Limited | Wholesale & retail | 2010 |
| Wonderful Nails and Beauty Limited | Other services | 2018 |
| Wong Day Accountants Limited | Professional & scientific | 2013 |
| Wontra Limited | Administrative & support | 2023 |
| Woocash Ltd | Wholesale & retail | 2018 |
| Wood ( S E) Limited | Wholesale & retail | 2005 |
| Wood END Adventures Forest Nursery Ltd | Education | 2023 |
| Wood Farm Consultancy Limited | Professional & scientific | 2020 |
| Wood in Hampshire Limited | Wholesale & retail | 1996 |
| Wood of Salisbury Limited | Wholesale & retail | 1992 |
| Wood View (Banbury) Management Company Limited | Households | 2024 |
| Wood Wizard Limited | Wholesale & retail | 2004 |
| Woodberry (Oxley Park) Management Company Limited | Households | 2024 |
| Woodbine Pallets Limited | Manufacturing | 2016 |
| Woodbine Properties Limited | Real estate | 2011 |
| Woodcote (MK) Investments Limited | Real estate | 2017 |
| Wooden, Sensory and Softplay Ltd | Wholesale & retail | 2021 |
| Woodend Ventures Limited | Real estate | 2014 |
| Woodera Limited | Construction | 2025 |
| Woodfloors 4 YOU Limited | Construction | 2008 |
| Woodford Hill Estates Limited | Administrative & support | 2025 |
| Woodhead Horns Limited | Manufacturing | 2009 |
| Woodingcarpentry Ltd | Construction | 2014 |
| Woodland & Bayliss Limited | Wholesale & retail | 2001 |
| Woodlands Pre-School (Warners END) Ltd | Health & social care | 2022 |
| Woodley Projects Limited | Professional & scientific | 2015 |
| Woodley Services Ltd | Real estate | 2002 |
| Woodruff MEC Ltd | Construction | 2020 |
| Woodruff Property Management Limited | Real estate | 2006 |
| Woodside Court (Aylesbury) Limited | Hospitality | 1998 |
| Woodside Lofts & Extensions Ltd | Construction | 2018 |
| Woof Dog Co Ltd | Other services | 2020 |
| Woof Professional Dog Grooming Ltd | Other services | 2020 |
| Woolstone Capital Services Ltd | Financial services | 2026 |
| Woolstone Enterprises Limited | Financial services | 2023 |
| Woolstone Footease Limited | Professional & scientific | 2025 |
| Woolstone Properties (M.K.) Limited | Construction | 2013 |
| Woolstones Community Centre Limited | Arts & recreation | 1985 |
| Woop Limited | Administrative & support | 2007 |
| Wootton Holdings Ltd | Professional & scientific | 2019 |
| Word Winners Limited | Professional & scientific | 2001 |
| Wordkeg Limited | Information & communication | 2015 |
| Work of Hands Limited | Wholesale & retail | 2020 |
| Work With Purpose Limited | Professional & scientific | 2018 |
| Workforce Software Ltd | Information & communication | 1986 |
| WORKFORCE24 Limited | Administrative & support | 2023 |
| Workhorse Builders Limited | Construction | 2003 |
| Working Free Limited | Professional & scientific | 2014 |
| Working Style Ltd | Wholesale & retail | 2023 |
| Workoutangel Limited | Extraterritorial | 2021 |
| Workplace Safety Associates Limited | Professional & scientific | 2000 |
| Workplace Services LLP | | 2022 |
| Workplace Systems International Limited | Information & communication | 2000 |
| Workspace Network Limited | Real estate | 2022 |
| Worktop Guys Limited | Construction | 2023 |
| Worktree | Education | 1992 |
| World Communion of Christian Celtic Convergence Churches Limited | Other services | 2011 |
| World Delta Limited | Information & communication | 1995 |
| World Food Mart Limited | Wholesale & retail | 2024 |
| World Freight Group Limited | Wholesale & retail | 1974 |
| World Media Initiatives Community Interest Company | Information & communication | 2012 |
| World of Lubricant Ltd | Wholesale & retail | 2017 |
| World Vision Trading Limited | Administrative & support | 2018 |
| World Vision UK | Health & social care | 1982 |
| World's VEG Ltd | Wholesale & retail | 2019 |
| Worldwage Services Ltd | Administrative & support | 2025 |
| Worldwide Computing Limited | Information & communication | 2002 |
| Worldwide Open University Ltd | Extraterritorial | 1996 |
| Worldwide Reservations Limited | Information & communication | 2020 |
| Worldwide Roar Limited | Information & communication | 2014 |
| Worlington Farms Limited | Agriculture & fishing | 1958 |
| Worthmore Products Limited | Wholesale & retail | 2020 |
| Worx Ltd | Construction | 2024 |
| Wosenti Limited | Other services | 2020 |
| Wotcha Limited | Financial services | 2023 |
| Wound DOC Limited | Health & social care | 2020 |
| WOW Competitions Ltd | Wholesale & retail | 2022 |
| WOW Design Solutions Limited | Information & communication | 2014 |
| WOW Evolution Ltd | Information & communication | 2023 |
| WOW Search Limited | Professional & scientific | 2013 |
| WOW365 Limited | Information & communication | 2019 |
| WP Pro Cars Ltd | Wholesale & retail | 2024 |
| Wpdm Ltd | Information & communication | 1999 |
| WR Operations Ltd | Professional & scientific | 2025 |
| Wrap IT and Run Ltd | Hospitality | 2016 |
| Wren Architecture and Design Limited | Professional & scientific | 2009 |
| Wren Electronics Limited | Manufacturing | 2005 |
| Wren Retreats Ltd | Real estate | 2025 |
| Wren Solar Ltd | Construction | 2026 |