| WMS Civils Ltd | Construction | 2025 |
| WMW Properties (SW) Limited | Real estate | 2025 |
| Wonderful Little Minds Nanny Services Ltd | Health & social care | 2025 |
| Woodbuild Homes Limited | Administrative & support | 1999 |
| Woodclip Limited | Information & communication | 2004 |
| Woodland Cars Ltd | Wholesale & retail | 2020 |
| Woodlands Bridgwater Limited | Real estate | 2013 |
| Woodshed Creative Limited | Arts & recreation | 2015 |
| Woodstone Builders Limited | Construction | 2018 |
| Woodwork Machinery Services Ltd | Manufacturing | 2016 |
| Woofers Ltd | Other services | 2017 |
| Wootley's Limited | Professional & scientific | 2009 |
| Words and Seeds Limited | Administrative & support | 2018 |
| Worrall Construction Ltd | Construction | 2022 |
| Worrall Developments Ltd | Construction | 2025 |
| Wort Woodlands Ltd | Agriculture & fishing | 2025 |
| Woven Willow Wonders Ltd | Manufacturing | 2025 |
| Wright Digital Media Limited | Information & communication | 2016 |
| Wright FIX Reinforcements Ltd | Construction | 2026 |
| Wrigwell Estates Limited | Real estate | 1994 |
| Write the Story Ltd | Professional & scientific | 2024 |
| WRT Transport Ltd | Transport & logistics | 2018 |
| WSR Construction SW Ltd | Construction | 2020 |
| WT Doorsets Ltd | Manufacturing | 2026 |
| WW Performance Leadership Ltd | Education | 2025 |
| Wychanger Limited | Manufacturing | 2014 |
| Wyvern Fitness Ltd | Arts & recreation | 2021 |
| Wyvern Innovations Limited | Professional & scientific | 2014 |
| XL Financial Services Limited | Financial services | 2007 |
| Xpressions Cosmetics Ltd | Wholesale & retail | 2021 |
| Yasar Pure Mobile Catering Limited | Hospitality | 2021 |
| YD Property Group Ltd | Real estate | 2024 |
| YE Olde Compass Garage Ltd | Wholesale & retail | 2011 |
| Yellowkey Ltd | Administrative & support | 2021 |
| YES Property Development Ltd | Construction | 2021 |
| Yiannitrading Ltd | Wholesale & retail | 2026 |
| Yildiz Hair Salon Ltd | Other services | 2020 |
| Yoksul Limited | Hospitality | 2026 |
| YOS Construct Ltd | Construction | 2021 |
| Your Car (GB) Ltd | Wholesale & retail | 2005 |
| Your Personal Chauffeur Ltd | Transport & logistics | 2022 |
| Yucca Ltd | Professional & scientific | 2018 |
| Yummy Brazilian Food Ltd | Hospitality | 2022 |
| Yummy Bridgwater Ltd | Hospitality | 2025 |
| Zakjamm Ltd | Construction | 2025 |
| Zaldore Limited | Real estate | 2024 |
| Zandoey Limited | Financial services | 2018 |
| Zariman 10-0 Limited | Professional & scientific | 2024 |
| Zeffco Ltd | Manufacturing | 2019 |
| Zeppelin Invest Limited | Real estate | 2025 |
| Zestanm Limited | Wholesale & retail | 2026 |
| Zeus Opco Limited | Transport & logistics | 2023 |
| Zhilla Limited | Health & social care | 2023 |
| ZHU Nurain International, UK Ltd | Professional & scientific | 2024 |
| Zimre Healthcare Services Limited | Health & social care | 2023 |
| ZLD Limited | Administrative & support | 2010 |
| Zoyland Ltd | Professional & scientific | 2025 |
| Zukr Ltd | Manufacturing | 2021 |
| Zupo Ltd | Health & social care | 2022 |
| Zvedu Limited | Health & social care | 2026 |