| Wheelon Limited | Professional & scientific | 2005 |
| White Birch Limited | Construction | 2022 |
| Wild Olive Adventures Limited | Information & communication | 2024 |
| Williams Interiors Ltd | Construction | 2019 |
| Willo Limited | Transport & logistics | 2016 |
| Willow & Vine Property Limited | Households | 2025 |
| Willow Dean Homes Limited | Construction | 2004 |
| Winback UK Ltd | Health & social care | 2017 |
| Windlesham Ford Limited | Extraterritorial | 1996 |
| Windsor Cottage Limited | Real estate | 2024 |
| Windsor Forest Court Limited | Real estate | 2005 |
| Windsor Forest Court Management Limited | Households | 2016 |
| Windsor Healthcare Recruitment Group Ltd | Administrative & support | 2023 |
| Windsor Homes Limited | Construction | 1985 |
| Windsor Knee Clinic LLP | | 2010 |
| Windsor Theatre Limited | Arts & recreation | 1997 |
| Windsor Villas Limited | Construction | 2022 |
| Winkfield Consulting Services Ltd | Professional & scientific | 2019 |
| Wintersbrooke House Management Company Limited | Households | 2018 |
| Wintersbrooke Residents Management Company Limited | Real estate | 2022 |
| Wireup.Uk Electrical Ltd | Construction | 2019 |
| Wise Network Solutions Ltd | Information & communication | 2007 |
| Within the Word Ltd | Information & communication | 2020 |
| Witley Hundred Limited | Construction | 2013 |
| Woburn Field Limited | Construction | 2025 |
| Wodp Australia Ltd | Information & communication | 2024 |
| Wodp Canada Ltd | Information & communication | 2023 |
| Wodp Holland Ltd | Information & communication | 2025 |
| Wolfdt Ltd | Energy | 2023 |
| Wooden Shoes Translations Limited | Administrative & support | 2010 |
| Woodglade Consultants Limited | Professional & scientific | 2009 |
| Woodgrave Limited | Real estate | 2003 |
| Woods Wellness Voyage Ltd | Other services | 2023 |
| Work Wise Wellness Ltd | Other services | 2011 |
| Worksmartgpt Limited | Information & communication | 1997 |
| World Wise Foods International Limited | Wholesale & retail | 2023 |
| World Wise Foods Limited | Wholesale & retail | 2010 |
| Worldwide Estates Limited | Real estate | 1971 |
| Wtenergy Ltd | Energy | 2019 |
| WTW Management Limited | Professional & scientific | 1994 |
| Wyldewoods Management Company Limited | Households | 2000 |
| X88 Limited | Information & communication | 2017 |
| Xemplar Consulting Limited | Professional & scientific | 2020 |
| Xenon Technology Limited | Information & communication | 1995 |
| Xigere IT Ltd | Information & communication | 2013 |
| Xquisite Limited | Construction | 2019 |
| XRL Events (UK) Limited | Arts & recreation | 2014 |
| Y & R Housing Ltd | Households | 2022 |
| Y S Consultants Limited | Professional & scientific | 2011 |
| Yahweh Enterprise Ltd | Health & social care | 2021 |
| Yardley Associates Limited | Information & communication | 2013 |
| Yarelia Limited | Other services | 2025 |
| Yashhprem Ltd | Hospitality | 2020 |
| Yellow Red and Blue Gallery Ltd | Wholesale & retail | 2024 |
| Yellowbrick Data UK Limited | Information & communication | 2015 |
| Yellowhill Ltd | Real estate | 2021 |
| YF Elite Ltd | Professional & scientific | 2022 |
| YGE Limited | Real estate | 2022 |
| YLM Services Limited | Construction | 2024 |
| Yong & Co Ltd | Manufacturing | 1998 |
| YOU Multiplied Limited | Information & communication | 2026 |
| Young Property Enterprise Ltd | Real estate | 2017 |
| Your Choices in Later Life Limited | Professional & scientific | 2013 |
| Youruk Limited | Information & communication | 2020 |
| Yprojects Limited | Professional & scientific | 2023 |
| Ytnt UK Ltd | Hospitality | 2018 |
| Yunflow Investment Group Ltd | Wholesale & retail | 2025 |
| Zaffre Concierge Ltd. | Health & social care | 2021 |
| Zanoo Limited | Professional & scientific | 2004 |
| Zelos Solutions Limited | Real estate | 2014 |
| ZEN Reformer Pilates Group Ltd | Arts & recreation | 2026 |
| Zeneesha Capital Limited | Real estate | 2025 |
| Zeneesha Ltd | Information & communication | 2015 |
| Zeroeasy Limited | Professional & scientific | 2021 |
| Zeus Bar & Club Ltd | Hospitality | 2022 |
| Zidaan Coffee Co Ltd | Hospitality | 2019 |
| Zion Music | Education | 2023 |
| ZOE Christie Consulting Ltd | Professional & scientific | 2022 |
| Zoned Ltd | Manufacturing | 2015 |
| Zynk Design Limited | Administrative & support | 2001 |
| Zynk Property Limited | Real estate | 2018 |