| Winterhead Limited | Administrative & support | 2013 |
| Winters Building Company Limited | Construction | 2007 |
| Winters Property Management Ltd | Households | 2024 |
| Winton Bookshop Ltd | Wholesale & retail | 2012 |
| Winton Precision Engineering Ltd | Manufacturing | 2004 |
| Winwin Clearance and Removals Ltd | Water & waste | 2025 |
| Wired Automotive Ltd | Professional & scientific | 2023 |
| Wired Electrics South Ltd | Construction | 2026 |
| Wisdombear Consulting Ltd | Professional & scientific | 2026 |
| Wise Applications Ltd | Information & communication | 2024 |
| Wise Bean Ltd | Wholesale & retail | 2023 |
| Wise UK Engineering Limited | Construction | 2010 |
| Wisecomms Ltd | Education | 2023 |
| Wisestreamsolutions Ltd | Real estate | 2026 |
| Wishing Season Network Technology UK Ltd | Information & communication | 2026 |
| Wissdev App Ltd | Information & communication | 2025 |
| Wisteria Lodge Limited | Health & social care | 2007 |
| Witchampton Garage Limited | Extraterritorial | 2004 |
| Witchampton Mill Residents Association Limited | Households | 1997 |
| Witchorizon Limited | Wholesale & retail | 2014 |
| With Honours Ltd | Information & communication | 2017 |
| Witness Wellness Ltd | Wholesale & retail | 2022 |
| Witney NO:1 Management Limited | Real estate | 1998 |
| Witte Orthopaedics Ltd | Professional & scientific | 2023 |
| Wize Group Limited | Wholesale & retail | 2025 |
| Wizpip Limited | Information & communication | 2011 |
| Wizzosmart Ltd | Wholesale & retail | 2023 |
| Wjbm Limited | Administrative & support | 2015 |
| WJG Property Ltd | Real estate | 2021 |
| Wjgb Limited | Financial services | 2012 |
| WJP Brokerage Limited | Professional & scientific | 2017 |
| Wldk Limited | Wholesale & retail | 2025 |
| WM2 Consulting Ltd | Information & communication | 2024 |
| Wmbw Limited | Wholesale & retail | 2019 |
| Woamaz Ltd | Wholesale & retail | 2025 |
| WOK4GO Wallisdown Limited | Hospitality | 2024 |
| Wokka Spirits Limited | Wholesale & retail | 2000 |
| Wolf Event Services Limited | Arts & recreation | 2006 |
| Wolfeton Manor Healthcare Limited | Health & social care | 2005 |
| Wolfies Ltd | Wholesale & retail | 2019 |
| Wolhayes Lands Limited | Real estate | 1961 |
| Woman of Joy C.I.C. | Information & communication | 2025 |
| Woman of Purpose CIC | Education | 2026 |
| Women+ in Geospatial CIC | Professional & scientific | 2021 |
| Wonder & Co Consulting Ltd | Professional & scientific | 2025 |
| Wonder Inc Limited | Information & communication | 2024 |
| Wonderland Management Agency Limited | Arts & recreation | 2015 |
| Wonderslot Ltd | Information & communication | 2025 |
| Wonkiwear Ltd | Wholesale & retail | 2018 |
| Wood & Williams Limited | Construction | 2023 |
| Woodcroft Developments ( KEW ) Limited | Construction | 2020 |
| Woodcroft Developments (Chatham) Limited | Construction | 2016 |
| Woodcroft Developments (London) Limited | Construction | 2015 |
| Woodcutter Close Management Limited | Households | 2021 |
| Woodend Service & Management Company Limited | Households | 1993 |
| Woodfalls Management Company Limited | Real estate | 1995 |
| Woodford Brothers Properties Ltd | Real estate | 2022 |
| Woodford Court Limited | Real estate | 2006 |
| Woodford Green Quality Care Ltd | Health & social care | 2024 |
| Woodford Marine Ltd | Manufacturing | 2017 |
| Woodgreen Carpentry Limited | Construction | 2006 |
| Woodlake Properties Limited | Real estate | 1995 |
| Woodland Dreams Limited | Professional & scientific | 2002 |
| Woodland Mansions Maintenance Co. Limited | Households | 1965 |
| Woodland Park Freehold Limited | Households | 2007 |
| Woodland Park Sea View Management Limited | Households | 1994 |
| Woodlands Capital Ltd | Real estate | 2015 |
| Woodlands Commercial Property Ltd | Real estate | 2016 |
| Woodlands Construction Limited | Construction | 2023 |
| Woodlands Nursery (Dorset) Limited | Agriculture & fishing | 2012 |
| Woodlands Property (Dorset) Limited | Construction | 2021 |
| Woodlea Investments Ltd | Real estate | 2020 |
| Woodman Stone Ltd | Professional & scientific | 2024 |
| Woodmanship Ltd | Information & communication | 2025 |
| Woodram Consulting Limited | Professional & scientific | 2009 |
| Woods View Lodge Limited | Households | 2000 |
| Woodside Financial Services Ltd | Financial services | 2024 |
| Woodson Village Ltd | Professional & scientific | 2012 |
| Woodster & Co Limited | Financial services | 2022 |
| Woodstock Carpentry and Joinery Ltd | Construction | 2014 |
| Woodstock Legal Holdings Limited | Financial services | 2022 |
| Woodstock Legal Services Limited | Professional & scientific | 2014 |
| Woodville Stretton (Poole) Limited | Wholesale & retail | 2011 |
| Woodworks Media Limited | Information & communication | 2005 |
| Woofast Ship Ltd | Wholesale & retail | 2023 |
| Woolfit Limited | Wholesale & retail | 2019 |
| Woolooware Freight Logistics Limited | Transport & logistics | 2024 |
| Wordady Ltd | Information & communication | 2025 |
| Work Experience Limited | Administrative & support | 2012 |
| Workbench Ltd | Manufacturing | 2023 |
| Workday Works Ltd | Other services | 2017 |
| Workforce Results Ltd | Professional & scientific | 2018 |
| Working Boys Club Ltd | Arts & recreation | 2022 |
| Working Widgets Ltd | Information & communication | 2022 |
| World Adventure Golf Tour Community Interest Company | Arts & recreation | 2024 |
| World Advisers Ltd. | Professional & scientific | 2007 |
| World Fitness Running International Sports Science Ltd | Education | 2025 |
| World Humanism Limited | Extraterritorial | 2017 |
| World of Water (U.K.) Limited | Extraterritorial | 1990 |
| World of Water Aquatic Centres Limited | Wholesale & retail | 2003 |