| Watergates Cosec Ltd | Extraterritorial | 2006 |
| Watergates Developments Ltd | Construction | 2011 |
| Watergates Estates Ltd | Construction | 2011 |
| Watergates Ltd | Information & communication | 1999 |
| Waterless Wash Ltd | Other services | 2022 |
| Watermead Accountants Limited | Professional & scientific | 2015 |
| Watermead Dental Limited | Health & social care | 2026 |
| Watermead Financial Limited | Administrative & support | 2001 |
| Watermead Group Ltd | Wholesale & retail | 2026 |
| Watermead Publishing Limited | Information & communication | 1997 |
| Watermelon Innovations Ltd | Wholesale & retail | 2024 |
| Watermelonai Ltd | Information & communication | 2025 |
| Waternewton Deals Ltd | Hospitality | 2015 |
| Waters Generations Limited | Financial services | 2026 |
| Waters Homes Ltd | Construction | 2000 |
| Waterside Harborough Limited | Hospitality | 2012 |
| Watertech Heating Limited | Construction | 2020 |
| Waterwalk Investments Ltd | Real estate | 2025 |
| Waterway Holdings Limited | Real estate | 2021 |
| Watford College Ltd | Education | 2025 |
| Watford Properties Burvale Limited | Real estate | 2023 |
| Watford Properties Ltd | Real estate | 2021 |
| Watkins & Mintons Limited | Manufacturing | 2013 |
| Watkins Leicester Ltd | Real estate | 2016 |
| Watling JCB Landpower Limited | Wholesale & retail | 1987 |
| Watling JCB Limited | Wholesale & retail | 1976 |
| Watling JCB Power Generation Limited | Wholesale & retail | 1997 |
| Watson & Co Holdings Limited | Financial services | 2025 |
| Watson Investment Holdings Ltd | Real estate | 2024 |
| Watsons Group Limited | Real estate | 2020 |
| Watt Joule & Therm Holdings Limited | | 1980 |
| Wattie & Ball Holdings Limited | Financial services | 2026 |
| Watts Holdco Ltd | Financial services | 2024 |
| Watts Topco Ltd | Financial services | 2024 |
| Watts Wealth Holdings Limited | Financial services | 2022 |
| Wave Impex Limited | Wholesale & retail | 2019 |
| Wavecrest Innovations Limited | Information & communication | 2023 |
| Waveney Solutions Ltd | Professional & scientific | 2014 |
| Waverley DEV Ltd | Real estate | 2016 |
| Waves of Positivity CIC | Information & communication | 2020 |
| Waves Packaging Ltd | Wholesale & retail | 2023 |
| Wavix Limited | Professional & scientific | 2024 |
| Wavy ASH Ltd | Real estate | 2022 |
| Wawathalapi Ltd | Other services | 2006 |
| Waxme Hair Removal Limited | Wholesale & retail | 2021 |
| Way 2 Save Grocers Limited | Wholesale & retail | 2019 |
| Way to Success Driving Academy Ltd | Education | 2024 |
| Waybourne Ltd | Wholesale & retail | 2025 |
| Wayfare Limited | Wholesale & retail | 2013 |
| Waygate Engineering Co.Limited | Manufacturing | 1966 |
| Wayne Smith Transport Limited | Transport & logistics | 2025 |
| Waynecorp Solutions Ltd | Construction | 2023 |
| Waypex Property Limited | Real estate | 2025 |
| Wayside Property 2013 Limited | Real estate | 2013 |
| Waystar Designs Ltd | Professional & scientific | 2024 |
| WAZ Groups Ltd | Hospitality | 2026 |
| Wazir Ausalut Ltd | Administrative & support | 2017 |
| WB Air Conditioning and Refrigeration Ltd | Construction | 2023 |
| WB Pharma Ltd | Wholesale & retail | 2019 |
| WB Properties and Investments Limited | Real estate | 2024 |
| WB Rendering & Plastering Limited | Construction | 2022 |
| WB Surveying Services Ltd | Professional & scientific | 2022 |
| WBR Actuarial Limited | Financial services | 2004 |
| WBR Group Holdings Limited | Financial services | 2023 |
| WBR Group Limited | Financial services | 2020 |
| WBR Law Limited | Professional & scientific | 2023 |
| WBR Pension Administration Limited | Professional & scientific | 2020 |
| WBR Scheme Administration Limited | Professional & scientific | 2020 |
| WBR Tax Limited | Professional & scientific | 2016 |
| WBR Trustees Limited | Professional & scientific | 2020 |
| Wbys Limited | Wholesale & retail | 2015 |
| Wclark Holdings Ltd | Real estate | 2024 |
| WCS Consultancy Limited | Financial services | 2016 |
| Wcsl Holdings Limited | Financial services | 2019 |
| WD Consultancy Services Ltd | Administrative & support | 2017 |
| WD Trans Ltd | Transport & logistics | 2014 |
| Wdbt Limited | Manufacturing | 2024 |
| Wddezigns Enterprise Ltd | Manufacturing | 2024 |
| WDE Solutions Ltd | Administrative & support | 2012 |
| WDW Service Ltd | Wholesale & retail | 2019 |
| WE ARE Epic Inclusive Arts Community Interest Company | Arts & recreation | 2017 |
| WE Care Communication UK Group Ltd | Information & communication | 2025 |
| WE Care Communications Group UK Limited | Information & communication | 2025 |
| WE Care Community Solutions Ltd | Health & social care | 2025 |
| WE Craft Work Limited | Information & communication | 2015 |
| WE Love Cleaning Ltd. | Other services | 2004 |
| WE Rize Ltd | Professional & scientific | 2025 |
| WE Vaneau Limited | Manufacturing | 2025 |
| We'Ve a Design Ltd | Extraterritorial | 2014 |
| WE4R Limited | Real estate | 2018 |
| Wealth by Nebula Limited | Education | 2025 |
| Wealthology by Svar Ltd | Financial services | 2026 |
| Weapons of Mass Destruction Ltd | Wholesale & retail | 2020 |
| Wearable Technologies Limited | Information & communication | 2013 |
| Weareisin Limited | Financial services | 2021 |
| Weareretail Limited | Professional & scientific | 2016 |
| Wearring-Smith Ltd | Other services | 2020 |
| Weather Touch Roofing and Building Ltd | Construction | 2025 |
| Weatherhead & Sons Ltd | Administrative & support | 2025 |
| Weatherlok Windows Limited | Construction | 1987 |