| Wired in Electrical Ltd | Construction | 2018 |
| WIS Detect Limited | Administrative & support | 2024 |
| Wise HR Services Ltd | Administrative & support | 2016 |
| Withiescompton Ltd | Hospitality | 2025 |
| Witley Enterprises Limited | Professional & scientific | 2016 |
| Witley Station Garage Limited | Wholesale & retail | 2002 |
| Wizard Video Productions Limited | Information & communication | 1990 |
| Wolseley PM Ltd | Professional & scientific | 2024 |
| Wonderment Creative Ltd | Professional & scientific | 2019 |
| Woodbakht Ltd | Real estate | 2023 |
| Woodcroft (Witley) Management Company Limited | Households | 2013 |
| Woodland 7 Ltd | Real estate | 2018 |
| Woodley Stationery & Toys Ltd | Wholesale & retail | 2024 |
| Woods and WEY Ltd | Hospitality | 2026 |
| WOODS4TREES Ltd | Professional & scientific | 2013 |
| Woodyard Contractors Ltd | Construction | 2026 |
| Woop Digital Ltd | Information & communication | 2021 |
| Wordpress Limited | Manufacturing | 2018 |
| Worksmart Roofing and Building Group Ltd | Construction | 2025 |
| World History Publishing Ltd | Information & communication | 2012 |
| World Memory Championships Limited | Extraterritorial | 2016 |
| World Mind Mapping & World Speed Reading Championships Limited | Extraterritorial | 2015 |
| Worldluxe Travel Limited | Administrative & support | 2024 |
| Worldwide Legacy Limited | Professional & scientific | 2023 |
| Wren Audio Ltd | Manufacturing | 2023 |
| Wright Communications Group Limited | Professional & scientific | 2018 |
| Wright Finance Support Ltd | Professional & scientific | 2011 |
| Wrigley Mortgage Services Ltd | Financial services | 2025 |
| WS Construction Company Limited | Construction | 2018 |
| Wulmer Associates Limited | Professional & scientific | 2012 |
| Wylde & Co Limited | Professional & scientific | 2006 |
| Wynyabbie Limited | Financial services | 2020 |
| XDS Communications Services Limited | Professional & scientific | 2013 |
| Xquisite Nails Ltd | Other services | 2023 |
| XRN Engineering Limited | Wholesale & retail | 1980 |
| XYE Accessories Ltd | Wholesale & retail | 2020 |
| Y-Bryn Management Company Limited | Households | 1984 |
| Yalloot Limited | Education | 2025 |
| Yard B Limited | Information & communication | 2017 |
| Yesles Ltd | Professional & scientific | 2014 |
| YGW Consulting Ltd | Professional & scientific | 2024 |
| Ynwa Solutions Limited | Professional & scientific | 2007 |
| Yoreland Design Limited | Administrative & support | 2019 |
| Youlio Health Ltd | Information & communication | 2026 |
| Young & Frewin Ltd | Professional & scientific | 2018 |
| Young Virtuoso Academy Ltd | Administrative & support | 2025 |
| Youngtech Consultant & Services Limited | Financial services | 2020 |
| Younique Gardens Limited | Administrative & support | 2013 |
| Your Business Tools Ltd | Information & communication | 2013 |
| Your People 1ST Ltd | Professional & scientific | 2022 |
| Your Wedding Hair and Makeup Limited | Other services | 2005 |
| Yourmoods Limited | Information & communication | 2013 |
| Yourspace.Golf Ltd | Professional & scientific | 2022 |
| Z Cyber Limited | Administrative & support | 2016 |
| Zaang Ltd | Manufacturing | 2016 |
| Zafari Limited | Professional & scientific | 2007 |
| Zara,S Spice HUT Ltd | Hospitality | 2025 |
| Zasha Investments Ltd | Professional & scientific | 2024 |
| ZD Consultancy Services Limited | Professional & scientific | 2026 |
| Zejak Ridgebacks Limited | Agriculture & fishing | 2020 |
| Zenea Solutions Ltd | Professional & scientific | 2020 |
| ZJF Holdings Ltd | Real estate | 2024 |
| Zone Music Limited | Information & communication | 2007 |