| Weybridge Funeral Service Limited | Other services | 1980 |
| WGL Lighting Ltd | Construction | 2022 |
| Whasap Limited | Administrative & support | 2013 |
| What to ASK Ltd | Education | 2024 |
| Wheel FIX Staines Limited | Wholesale & retail | 2021 |
| White Bear Limited | Wholesale & retail | 2025 |
| White Transport Ltd | Transport & logistics | 2026 |
| Whitegates Property Management Limited | Households | 2011 |
| Whitley Morrow Ltd | Wholesale & retail | 2026 |
| Whitmore Chase Ltd | Administrative & support | 2025 |
| Wiafe & Family Cleaning Services Ltd | Administrative & support | 2022 |
| Wickenden & SON Limited | Other services | 1946 |
| Wilhermina Catering & Events Limited | Hospitality | 2025 |
| Williams & Hill Limited | Transport & logistics | 2002 |
| Williams & Hill Storage & Distribution Limited | Transport & logistics | 2008 |
| Williams and Hill Group Ltd | Professional & scientific | 2015 |
| Williams and Williams London Limited | Transport & logistics | 2018 |
| Willmast Care Ltd | Health & social care | 2022 |
| Willow Creek Limited | Real estate | 2026 |
| Wilson&Evy Ltd | Real estate | 2025 |
| Wimbledon Lakes Limited | Real estate | 2022 |
| Wimpex Ltd | Wholesale & retail | 2022 |
| WIN B Pro Limited | Wholesale & retail | 2023 |
| Wines of World Ltd | Wholesale & retail | 2017 |
| Wink Aesthetics Ltd | Other services | 2024 |
| Wink Hair & Beauty Ltd | Other services | 2017 |
| Winners Choice Limited | Information & communication | 2017 |
| WISE4WISE Ltd | Professional & scientific | 2019 |
| Wish Capital Limited | Construction | 2022 |
| Wizkid Games Ltd | Information & communication | 2026 |
| WJS Cleaning Ltd | Administrative & support | 2023 |
| WL Buildconcepts Limited | Construction | 2020 |
| WM Tangram Ltd | Wholesale & retail | 2020 |
| Wolf EYE K9 Section Ltd | Administrative & support | 2021 |
| Wolf EYE K9 Security Ltd | Administrative & support | 2017 |
| Wolf.Pl Limited | Transport & logistics | 2022 |
| Wolke Technologies Ltd | Information & communication | 2018 |
| Wolvey Ltd | Administrative & support | 2025 |
| Wonder Cuddles Crochet Limited | Manufacturing | 2023 |
| Wonder Door Healer Ltd | Manufacturing | 2022 |
| Woodland Grill Ltd | Hospitality | 2024 |
| Woodmans Group UK Limited | Administrative & support | 2018 |
| Woollington Ltd | Manufacturing | 2024 |
| Woolpex Ltd | Wholesale & retail | 2025 |
| Wooven WOW Ltd | Wholesale & retail | 2025 |
| Work Force Group Limited | Real estate | 2016 |
| Work Place Champion - the Learning Curve Limited | Health & social care | 2020 |
| Workahomic Ltd | Information & communication | 2024 |
| Workroot Couriers Ltd | Transport & logistics | 2026 |
| Workshop IT Ltd. | Information & communication | 2013 |
| World Courier (U.K.) Limited | Transport & logistics | 1974 |
| World Zarathushti Organisation Limited | Extraterritorial | 2002 |
| World Zoroastrian Organisation Limited(The) | Other services | 1980 |
| Worldwide Designs Limited | Information & communication | 2013 |
| WOW Lounge Ltd | Other services | 2024 |
| WP Plumbing and Heating Ltd | Construction | 2022 |
| WSJ and Sons Limited | Health & social care | 2007 |
| WY Property Ltd | Real estate | 2022 |
| WZO Limited | Professional & scientific | 2024 |
| Xerocrypt Ltd | Information & communication | 2018 |
| XG Concept Limited | Wholesale & retail | 2006 |
| Xpert Global Ltd | Wholesale & retail | 2023 |
| Xtracreative Ltd | Information & communication | 2021 |
| Xylo Marketing Ltd | Professional & scientific | 2025 |
| Y&H Transport Solutions Ltd | Transport & logistics | 2018 |
| Y&R Homes Ltd | Real estate | 2026 |
| YA KE Trading Ltd | Professional & scientific | 2012 |
| Yaashima Limited | Information & communication | 2022 |
| Yalcare Limited | Health & social care | 2016 |
| Yanglabung Dhode Limited | Transport & logistics | 2025 |
| Yany Ltd | Other services | 2018 |
| Yaqoob Chaudhry Ltd | Real estate | 2024 |
| Ybfit Training Ltd | Education | 2009 |
| YBS Estate Limited | Real estate | 2025 |
| Yellow Sapphire Properties Limited | Real estate | 2023 |
| Yellows Service Limited | Other services | 2019 |
| Yhma Ltd | Information & communication | 2023 |
| Yieldcrest Capital Ltd | Professional & scientific | 2026 |
| Yiid Logistic Ltd | Transport & logistics | 2026 |
| Yincs Firm Limited | Other services | 2015 |
| Ying DA London Ltd | Manufacturing | 2023 |
| Yolly General Trader Limited | Agriculture & fishing | 2026 |
| York Design UK Ltd | Professional & scientific | 2023 |
| Yoruba Nation Radio and Television Limited | Information & communication | 2023 |
| YOS Squared Ltd | Information & communication | 2021 |
| YOU ARE the Data Ltd. | Wholesale & retail | 2019 |
| Youcef Air FIX Ltd | Construction | 2026 |
| Youkay Trucks Ltd | Wholesale & retail | 2023 |
| Your Hubb Ltd | Construction | 2016 |
| Your Luxury Chauffeurs Limited | Administrative & support | 2026 |
| Your Property Friends Ltd | Real estate | 2017 |
| Your Wellness Ltd | Hospitality | 2019 |
| Yours Essentials Limited | Wholesale & retail | 2025 |
| Youzens UK Ltd | Administrative & support | 2021 |
| YSS Rentals Limited | Real estate | 2017 |
| Yunagl Limited | Real estate | 2025 |
| Yundola Ltd | Transport & logistics | 2023 |
| Yuthin Consultancy Services Limited | Real estate | 2010 |
| Yuvi Transport Ltd | Transport & logistics | 2020 |
| Yuvraj Properties Limited | Real estate | 2018 |