| Windmill SPV Limited | Real estate | 2012 |
| Window Cleaning Heroes Ltd | Administrative & support | 2024 |
| Window Nation Ltd | Construction | 2021 |
| Windrush Kipepeo Ltd | Other services | 2024 |
| Windscreen Repairs Limited | Wholesale & retail | 2011 |
| Winged Sirius London Limited | Wholesale & retail | 2018 |
| Wingivers Limited | Professional & scientific | 2002 |
| Wings Developments (Peterborough) Ltd | Real estate | 2022 |
| Wings of Peterborough Limited | Wholesale & retail | 1999 |
| Winsor Road (Hampton) Management Company Ltd | Households | 2009 |
| Winston & Rocky Properties Ltd | Real estate | 2025 |
| Winston.Collection Ltd | Wholesale & retail | 2024 |
| Winterberry Group Ltd | Financial services | 2018 |
| Winterberry Topco Limited | Financial services | 2024 |
| Winters Fibre Solution Ltd | Information & communication | 2019 |
| Winters Ventures Ltd | Other services | 2023 |
| Wisa Homes Limited | Real estate | 2025 |
| WISH2SELL Ltd | Real estate | 2018 |
| Wishful Properties Limited | Real estate | 2019 |
| Wisjoy Ltd | Real estate | 2022 |
| Wisteria Consulting Limited | Professional & scientific | 2005 |
| Wistow Barbers Limited | Other services | 2012 |
| Wistow Engineering Ltd | Manufacturing | 2021 |
| Wistow Field Developments Limited | Construction | 2024 |
| With Your Pace Limited | Health & social care | 2024 |
| Witluk-Trans Limited | Transport & logistics | 2018 |
| Wittel Close Management Company Limited | Real estate | 2016 |
| Wittering Residents Company Limited | Households | 2000 |
| Wizz Recruitment Limited | Administrative & support | 2025 |
| WJ Books Limited | Information & communication | 2013 |
| WJB Importation Ltd | Wholesale & retail | 2025 |
| Wjfj Ltd | Water & waste | 2014 |
| WJZ Transport Ltd | Transport & logistics | 2018 |
| WK Innovation Ltd | Manufacturing | 2023 |
| WKA Group Ltd | Transport & logistics | 2026 |
| Wkcc Ltd | Wholesale & retail | 2025 |
| Wlodarski Transport Ltd | Transport & logistics | 2023 |
| WLS Group Limited | Construction | 2019 |
| WM News and Food Ltd | Wholesale & retail | 2017 |
| Wmcd Limited | Health & social care | 2013 |
| WMD Developments Ltd | Construction | 2018 |
| Wmor Ltd | Real estate | 2024 |
| WMT RR Ltd | Real estate | 2026 |
| Woch Transport Ltd | Transport & logistics | 2020 |
| Wojciech Electrician Ltd | Construction | 2015 |
| Woke Trading Limited | Extraterritorial | 2018 |
| Wolare Limited | Transport & logistics | 2023 |
| Wolciara HGV Ltd | Transport & logistics | 2025 |
| Wolex Auto Limited | Wholesale & retail | 2026 |
| Wolf Auto Tech Ltd | Wholesale & retail | 2017 |
| Wolf Creative Ltd | Professional & scientific | 2024 |
| Wolf Digital Marketing Ltd | Administrative & support | 2018 |
| Wolf Inclusion Ltd | Education | 2025 |
| Wolftime Gaming Limited | Wholesale & retail | 2021 |
| Wolrad Construction Limited | Construction | 2004 |
| Wolung Shop Ltd | Wholesale & retail | 2014 |
| Women in Print Group UK Ltd | Information & communication | 2019 |
| Womens Amateur Darts Circuit E F Limited | Education | 2023 |
| Womens Amateur Darts Circuit Limited | Professional & scientific | 2023 |
| Wonderful Care Services Ltd | Health & social care | 2021 |
| Wonderful Grace Care Services Ltd | Administrative & support | 2018 |
| Wonderland Soft Play Hire Limited | Arts & recreation | 2024 |
| Wondstar Company Ltd | Transport & logistics | 2015 |
| Wongs City Limited | Hospitality | 2019 |
| Wonkywilliams Ltd | Hospitality | 2018 |
| Wood West Holdings UK Limited | Financial services | 2026 |
| Woodbine Farms Limited | Financial services | 2019 |
| Woodbridge East Residents Company Limited | Households | 2004 |
| Woodbridge Properties and Homes LLP | | 2024 |
| Wooded Retreats Limited | Hospitality | 2017 |
| Woodgrange Service Station Limited | Wholesale & retail | 2002 |
| Woodgreen Pets Charity | Other services | 1986 |
| Woodhall Manor Properties Limited | Real estate | 2017 |
| Woodhouse & Sturnham (ST Neots) Limited | Wholesale & retail | 1995 |
| Woodhouse & Sturnham Limited | Wholesale & retail | 1978 |
| Woodhouse Developments Ltd | Construction | 2019 |
| Woodlands Park (Thorpe Road) Management Company Limited | Professional & scientific | 2015 |
| Woods Crier Limited | Real estate | 2026 |
| Woodston Business Centre Limited | Real estate | 2013 |
| Woodston Cars Ltd | Wholesale & retail | 2025 |
| Woodston Motorist Centre Limited | Wholesale & retail | 2011 |
| Woodstone Fire Ltd | Manufacturing | 2020 |
| Woodstone Food and Wine Ltd | Wholesale & retail | 2024 |
| Woofers Welcome Yorkshire Limited | Administrative & support | 2020 |
| Woolfox Commercial Developments Limited | Real estate | 2025 |
| Woolgate Court Limited | Professional & scientific | 2005 |
| Wooly Sports & Media Ltd | Information & communication | 2023 |
| Wootton Grange Residents Management Limited | Households | 2024 |
| Work Away Solutions Ltd | Real estate | 2026 |
| Workplace Property Limited | Real estate | 1971 |
| Workteam 24 Ltd | Construction | 2019 |
| World Car Sales Ltd | Wholesale & retail | 2024 |
| World Food Cafe Ltd | Hospitality | 2025 |
| Worldtrans Logistics Ltd | Transport & logistics | 2020 |
| Worthsmith Limited | Professional & scientific | 2024 |
| Worx (Stamford) Ltd | Information & communication | 2024 |
| Wover Limited | Wholesale & retail | 2023 |
| WOW Construction Limited | Construction | 2023 |
| WOW Fitness Limited | Arts & recreation | 2009 |
| Wowplates Ltd | Other services | 2011 |