| Worcester Enterprises Limited | Information & communication | 1996 |
| Words With Voice Ltd | Administrative & support | 2017 |
| Work Uniform Company Limited | Extraterritorial | 2021 |
| Work Wear 1 Limited | Wholesale & retail | 2018 |
| Workers Home Limited | Real estate | 2019 |
| Working I.T Solutions Ltd | Information & communication | 2004 |
| Workrollchen Limited | Hospitality | 2025 |
| Worksolv Ltd | Construction | 2021 |
| Workzone GHD Ltd | Administrative & support | 2023 |
| Workzone MCR Ltd | Administrative & support | 2020 |
| World Corp Limited | Transport & logistics | 2021 |
| World Edge Ltd | Information & communication | 2014 |
| World Netball Foundation | Arts & recreation | 2022 |
| World of Goodies Limited | Manufacturing | 2019 |
| World Online Telecom Limited | Information & communication | 1998 |
| World Wine Imports Limited | Wholesale & retail | 2018 |
| Worsley Cruising Club Limited the | Hospitality | 1972 |
| WOT Everyone Wants Ltd | Wholesale & retail | 2026 |
| WPZ Consultancy Ltd | Hospitality | 2022 |
| WR58 Limited | Professional & scientific | 2024 |
| WRA Surveyors Ltd | Professional & scientific | 2019 |
| Wragby Property Ltd | Extraterritorial | 2020 |
| Wraith Real Estate MCR Ltd | Real estate | 2025 |
| WRD (SZ) Ltd | Real estate | 2025 |
| Wreschner Party Planners Limited | Hospitality | 2020 |
| Wreste Investments Limited | Real estate | 2025 |
| Wreste Limited | Professional & scientific | 2024 |
| WW Estates Ltd | Real estate | 2024 |
| WW5 Ltd | Real estate | 2022 |
| Wysteria Ventures Ltd | Real estate | 2026 |
| Wyville Consultancy Limited | Professional & scientific | 2013 |
| X Rentals Limited | Administrative & support | 2024 |
| X-Hire Limited | Administrative & support | 2017 |
| X-Quick Software Ltd | Information & communication | 2025 |
| X1 Media City Tower a TA Ltd | Professional & scientific | 2021 |
| X2 Storage Limited | Wholesale & retail | 2020 |
| Xactmatch Ltd | Administrative & support | 2024 |
| Xander & ME Ltd | Wholesale & retail | 2020 |
| Xander Recruitment Group Limited | Administrative & support | 2021 |
| Xander Security Solutions Limited | Administrative & support | 2024 |
| Xappie Limited | Wholesale & retail | 2019 |
| Xcelplus Ltd | Information & communication | 2025 |
| Xebusiness Limited | Information & communication | 1999 |
| Xelvion Ltd | Wholesale & retail | 2025 |
| Xhale Vape Ltd | Wholesale & retail | 2021 |
| Xianlistudio Ltd | Information & communication | 2025 |
| Xigris Medical Limited | Health & social care | 2014 |
| XIN HAO Limited | Hospitality | 2025 |
| Xingbang UK Limited | Wholesale & retail | 2017 |
| Xnep Ltd | Construction | 2026 |
| Xpertrule Software Limited | Information & communication | 1985 |
| Xpin Limited | Financial services | 2013 |
| Xploded Music Limited | Information & communication | 2018 |
| XPO Motors World Ltd | Wholesale & retail | 2019 |
| Xquisite Vehicles Limited | Wholesale & retail | 2022 |
| Xservicegroup Ltd | Professional & scientific | 2017 |
| Xsolve Media Ltd | Information & communication | 2003 |
| Xtellus Capital Limited | Other services | 2025 |
| Xvaro Accounting Ltd | Professional & scientific | 2024 |
| Y & J One Limited | Extraterritorial | 2005 |
| Y E Investments Ltd | Real estate | 2015 |
| Y Pearlman Educational Consultancy Ltd | Education | 2025 |
| Y Platinum Holdings Ltd | Real estate | 2026 |
| Y-Axis Clothing Company Ltd | Wholesale & retail | 2024 |
| Y.F.T Properties Ltd | Real estate | 2021 |
| Y.L Sunshine Ltd | Other services | 2013 |
| Y.Labib Limited | Wholesale & retail | 2017 |
| Y2 Cafe Ltd | Hospitality | 2023 |
| Y2P Property Solutions Ltd | Hospitality | 2025 |
| YA & JA Estates Limited | Extraterritorial | 2005 |
| YA & JA Investments Limited | Extraterritorial | 2005 |
| YA Visuals Ltd | Information & communication | 2025 |
| Yacht PA Ltd | Extraterritorial | 2008 |
| Yadd Limited | Real estate | 2022 |
| Yagdil Ltd | Education | 2023 |
| YAL Solution Ltd | Professional & scientific | 2025 |
| Yaliville Ltd | Extraterritorial | 2008 |
| Yamaf Ltd | Professional & scientific | 2020 |
| Yanfra Limited | Real estate | 2023 |
| Yani Care Solutions Limited | Administrative & support | 2017 |
| Yankan Limited | Real estate | 2016 |
| YAP Anaesthetics Ltd | Health & social care | 2020 |
| Yara Appliances Limited | Wholesale & retail | 2023 |
| Yardshore Ltd | Real estate | 2019 |
| YAT Estates Ltd | Real estate | 2026 |
| YB Consulting (NW) Ltd | Professional & scientific | 2018 |
| YB Training Limited | Administrative & support | 2016 |
| Ybee Property Services Ltd | Construction | 2022 |
| YBM Estates Ltd | Real estate | 2020 |
| YBM Maintenance Ltd | Construction | 2019 |
| YC ER B Limited | Real estate | 2024 |
| YC Tech Limited | Wholesale & retail | 2018 |
| Ychyyk Limited | Real estate | 2021 |
| YCM Estates Ltd | Real estate | 2025 |
| YCS Estates Ltd | Real estate | 2026 |
| YCY Properties Ltd | Real estate | 2023 |
| YD Homes Limited | Real estate | 2021 |
| YD Project Services Co Ltd | Professional & scientific | 2020 |
| YDG Estates Group Ltd | Real estate | 2024 |
| Yearville Estates Limited | Extraterritorial | 2015 |