| Winnie Holdings Ltd | Administrative & support | 2024 |
| Wiredhaven Ltd | Construction | 2024 |
| Wiru Ltd | Construction | 2022 |
| Wisdom Foam Ltd | Wholesale & retail | 2025 |
| Wise Dwelling Restoring Ltd | Construction | 2025 |
| Wise Sparks Choice Ltd | Construction | 2022 |
| Withlovesignage Ltd | Wholesale & retail | 2026 |
| Witnessoja Ltd | Wholesale & retail | 2024 |
| Witsend Holdings Ltd | Professional & scientific | 2025 |
| Wizard Maintenance Ltd | Manufacturing | 2019 |
| WJ Diesels Limited | Wholesale & retail | 2023 |
| Wkwk Ltd | Transport & logistics | 2011 |
| WMH Properties Limited | Real estate | 2022 |
| Wobd Ltd | Manufacturing | 2021 |
| Woburn Court Freehold Company Ltd | Other services | 2013 |
| Wolf International Transport Limited | Transport & logistics | 2025 |
| Wonderland Catering Limited | Hospitality | 2024 |
| Wonderlandnails Ltd | Other services | 2022 |
| Wonderz Limited | Information & communication | 2006 |
| Wonderzhome Limited | Real estate | 2025 |
| Wood Consulting Environmental Limited | Professional & scientific | 2014 |
| Woodford Bridge Road Holdings Ltd | Real estate | 2022 |
| Woodgrange Solicitors LLP | | 2012 |
| Woodside Academy | Education | 2012 |
| Woodside Electrical & Cctv Ltd | Construction | 2022 |
| Woodward Healthcare Limited | Health & social care | 2022 |
| Words in Action Ltd | Professional & scientific | 2012 |
| Workfinders (Construction) Limited | Administrative & support | 2011 |
| Workplace Compliance Solutions Ltd | Professional & scientific | 2005 |
| Workwear Supply Store Limited | Wholesale & retail | 2018 |
| World Agencies Limited | Extraterritorial | 2012 |
| World Economic Programmes Services Ltd | Transport & logistics | 2024 |
| World Freight Consultants Ltd | Wholesale & retail | 2001 |
| World Freight Holdings Ltd | Financial services | 2022 |
| World Freight Loading Ltd | Transport & logistics | 2009 |
| World Freight Transport Limited | Professional & scientific | 2010 |
| World Kings Ministries | Other services | 2008 |
| Worldwright Limited | Manufacturing | 2016 |
| Worthing MB Ltd | Wholesale & retail | 2026 |
| WOW Glass Interiors Limited | Professional & scientific | 2011 |
| WOW Glass Limited | Construction | 2009 |
| WOW Glass London Limited | Extraterritorial | 2022 |
| WOW Glassworks Limited | Professional & scientific | 2007 |
| Wowyou Concepts Ltd | Other services | 2024 |
| Wpsr Limited | Information & communication | 2009 |
| WR Meats Limited | Wholesale & retail | 2012 |
| WRA Estates Limited | Construction | 2021 |
| Wrights Property Maintenance & Flooring Specialists Ltd | Construction | 2026 |
| WTA Services Ltd | Transport & logistics | 2025 |
| WTT Logistics Limited | Transport & logistics | 2011 |
| Wyldecrest Capital UK Ltd | Financial services | 2026 |
| Wyldecrest Events Limited | Administrative & support | 2018 |
| Wylie VC Holdings Limited | Financial services | 2023 |
| WYS Communications Ltd | Information & communication | 2020 |
| Wyzer UK Limited | Transport & logistics | 2008 |
| Xamp Property Ltd | Real estate | 2024 |
| Xclusive Entertainment Ltd | Hospitality | 2025 |
| Xerus UK Ltd | Administrative & support | 2022 |
| XHB Limited | Wholesale & retail | 2014 |
| Xobedient Limited | Other services | 2025 |
| XRK Building Solutions Ltd | Construction | 2022 |
| Xrss Limited | Wholesale & retail | 2014 |
| XTR Store Limited | Wholesale & retail | 2018 |
| Xtreme Makeup Ltd | Wholesale & retail | 2009 |
| Xuyang International Ltd | Wholesale & retail | 2009 |
| Y K Heating Ltd | Other services | 2021 |
| Y&G Concepts Limited | Health & social care | 2014 |
| Y3T Distributions Ltd | Health & social care | 2019 |
| Y81 Ltd | Construction | 2023 |
| Yahub Services Limited | Health & social care | 2024 |
| Yajee LDN Ltd | Hospitality | 2026 |
| Yalding Property Limited | Real estate | 2023 |
| Yalding Retail Limited | Wholesale & retail | 2023 |
| Yaqeen Properties Ltd | Real estate | 2022 |
| YAS Hospitality Ltd | Hospitality | 2025 |
| Yasa Global Ltd | Wholesale & retail | 2024 |
| Yasbro Groups Ltd | Wholesale & retail | 2022 |
| Yasu Enterprise Ltd | Wholesale & retail | 2022 |
| YE Ongar PUB Company Ltd | Hospitality | 2009 |
| Yearning Care Ltd | Health & social care | 2020 |
| Yeboah Holdings Ltd | Manufacturing | 2026 |
| Yellow Glow Ltd | Energy | 2026 |
| Yellowline Property Investments Ltd | Real estate | 2024 |
| Yellowline Recruitment Limited | Transport & logistics | 2008 |
| Yemfat Global Services Ltd | Health & social care | 2021 |
| Yens Global Concept Limited | Construction | 2024 |
| Yeriga Travels Limited | Administrative & support | 2025 |
| Yeti VZ Ltd | Construction | 2025 |
| Yinks Autos Limited | Wholesale & retail | 2016 |
| YKS Smile Limited | Health & social care | 2018 |
| Ylmm Ltd | Transport & logistics | 2026 |
| YM Essentials Ltd | Wholesale & retail | 2023 |
| YMD Ltd | Transport & logistics | 2023 |
| Yoton Ltd | Real estate | 2024 |
| Youdeservespecial Ltd | Manufacturing | 2022 |
| Young Turk Design Ltd | Professional & scientific | 2012 |
| Your Base Therapeutics Ltd | Health & social care | 2023 |
| Your Car Services Ltd | Wholesale & retail | 2021 |
| Your Exec Car Ltd | Transport & logistics | 2020 |
| Your Resolution Limited | Information & communication | 2024 |