| Whitton Lions Rugby Football Club Limited | Arts & recreation | 2011 |
| Whitton Lodge RTM Company Limited | Households | 2004 |
| Whitton Park Sports Association Community Interest Company | Arts & recreation | 2013 |
| Whitton Pizzas Limited | Professional & scientific | 2019 |
| Whitton Supermarket Limited | Wholesale & retail | 2015 |
| Whizz Traders Ltd | Wholesale & retail | 2025 |
| Wholesale Abaya Limited | Wholesale & retail | 2026 |
| Wholesale Guru Ltd | Wholesale & retail | 2022 |
| Wholesale Peri Peri Ltd | Manufacturing | 2023 |
| Wholesale Plus Ltd | Wholesale & retail | 2024 |
| Wholesalers Connect Ltd | Wholesale & retail | 2015 |
| Whonderr-Arthur Engineering Limited | Construction | 2016 |
| Whoosh Mobile Media Limited | Information & communication | 2014 |
| Whystone Ltd | Real estate | 2022 |
| Wicket Travel Limited | Administrative & support | 2026 |
| Wijaya Ltd | Hospitality | 2023 |
| Wild Chai Limited | Manufacturing | 2021 |
| William Sapcote Development Limited | Construction | 1981 |
| William Sapcote Limited | Real estate | 2014 |
| Willow & Sage Ltd | Wholesale & retail | 2024 |
| Willow Walk Developments Ltd | Construction | 2018 |
| Willowgrade Limited | Wholesale & retail | 2026 |
| Wiltshire Court (UK) Limited | Financial services | 2020 |
| Wiltshire Court Property Ltd | Construction | 2018 |
| Wimopen Retail Limited | Real estate | 2021 |
| WIN Property Developments Limited | Real estate | 2025 |
| Winbiz Limited | Wholesale & retail | 2023 |
| Wind Support IC Ltd | Manufacturing | 2022 |
| Windcastle Enterprise Limited | Other services | 2013 |
| Windows Store Limited | Construction | 2022 |
| Windows Web Ltd | Construction | 2024 |
| Windser Hire Ltd | Hospitality | 2026 |
| Wine 2 Dine Surrey Limited | Wholesale & retail | 2019 |
| Wink Services Ltd | Construction | 2024 |
| Winnie London Ltd | Manufacturing | 2023 |
| Winpower Direct Ltd | Energy | 2017 |
| Wintosh Plus Ltd | Wholesale & retail | 2019 |
| WIRECOM1 Ltd | Professional & scientific | 2014 |
| Wise Guys DIY Limited | Wholesale & retail | 2009 |
| Wish Motors Ltd | Wholesale & retail | 2021 |
| WIZ Technologies Ltd | Information & communication | 2006 |
| WL Data Solutions Ltd | Information & communication | 2014 |
| Wlcars. Ltd | Wholesale & retail | 2025 |
| WMK Groups Ltd | Real estate | 2025 |
| WMK Haulage Ltd | Transport & logistics | 2013 |
| WMK Sandhu Transport Ltd | Transport & logistics | 2021 |
| WMP Accountants Ltd | Professional & scientific | 2025 |
| Woakes Star Limited | Wholesale & retail | 2025 |
| WOJ Construction Ltd | Construction | 2021 |
| Wolkar Transport Ltd | Transport & logistics | 2025 |
| Wolton Partners Limited | Real estate | 2020 |
| WON2 Entertain U Ltd | Arts & recreation | 2023 |
| Wonderland Drinks Limited | Wholesale & retail | 2018 |
| Wongkey Oriental Retail Ltd | Wholesale & retail | 2026 |
| Woodlawn Auto Centre Ltd | Wholesale & retail | 2015 |
| Woodley Cafe Ltd | Hospitality | 2024 |
| Woodlon Limited | Real estate | 2011 |
| Woodside Practice Limited | Real estate | 2018 |
| Woodwal Properties UK Limited | Real estate | 2026 |
| Wopa Ltd | Information & communication | 2026 |
| Wordpress Hosting Ltd | Information & communication | 2014 |
| Work Health Solutions Limited | Health & social care | 2025 |
| World Business Centre Management Company Limited | Real estate | 2001 |
| World Connect London Ltd | Transport & logistics | 2026 |
| World Junior League Cricket Ltd | Arts & recreation | 2025 |
| World Memon Day Limited | Professional & scientific | 2025 |
| World Products Imports & Exports UK Ltd | Wholesale & retail | 2020 |
| World Residentials UK Ltd | Real estate | 2014 |
| World Stock and Bonds Ltd | Professional & scientific | 2024 |
| World Tele Tech Limited | Administrative & support | 2019 |
| World Travel and More Limited | Professional & scientific | 2015 |
| Worldwide Flight Services Limited | Transport & logistics | 1999 |
| Worldwide Intl Ltd | Wholesale & retail | 2024 |
| Worldwide Online Ltd | Wholesale & retail | 2019 |
| Worldwide Tyres Limited | Wholesale & retail | 2020 |
| Worldwide Visas Consultant Ltd | Administrative & support | 2025 |
| Worthmore Investments Ltd | Real estate | 2019 |
| Worthy Ware Limited | Wholesale & retail | 2025 |
| Wowcontructs Limited | Construction | 2026 |
| Wowzasoft Limited | Information & communication | 2025 |
| WPB Brands Ltd | Administrative & support | 2020 |
| Wrays Properties Ltd | Real estate | 2025 |
| WRL Construction Services Ltd | Construction | 2022 |
| WTS Group Limited | Transport & logistics | 2023 |
| Wwizard Ltd | Wholesale & retail | 2022 |
| Wyndreams Limited | Professional & scientific | 2026 |
| X-Tropic Fruits Ltd | Wholesale & retail | 2026 |
| Xcel Valeting Ltd | Wholesale & retail | 2021 |
| Xcelwrap Ltd | Wholesale & retail | 2025 |
| XEC Wholesale Ltd | Wholesale & retail | 2021 |
| Xitt Kodi House Ltd | Hospitality | 2026 |
| XLD Enterprise Limited | Other services | 2013 |
| Xoam Ltd | Wholesale & retail | 2024 |
| Xpcv Ltd | Professional & scientific | 2025 |
| Xpercia Limited | Information & communication | 2017 |
| Xpert Advice Ltd | Professional & scientific | 2024 |
| Xpress Direct Limited | Transport & logistics | 2013 |
| XSP Import and Export Ltd | Wholesale & retail | 2024 |
| Xtra Building Supplies Ltd | Wholesale & retail | 2010 |
| Xtreme Infosys Limited | Information & communication | 2016 |