| Working for the Wild Ltd | Professional & scientific | 2015 |
| World Exclusive International Trade Ltd | Other services | 2025 |
| Worthing (T) Hairdressing Limited | Other services | 2009 |
| Wpdl Limited | Professional & scientific | 2006 |
| Wudgie Ltd | Information & communication | 2012 |
| Www.Cupmed.Co.Uk Limited | Arts & recreation | 2007 |
| Wychwood Consulting Limited | Professional & scientific | 2009 |
| Wychwood Furniture Ltd. | Manufacturing | 2003 |
| Wyck&Neatham Limited | Arts & recreation | 2018 |
| Wylder Spas Limited | Other services | 2025 |
| Wylder Wellbeing Ltd | Other services | 2022 |
| Xavio Design Limited | Professional & scientific | 2015 |
| Xelenproducts Ltd | Wholesale & retail | 2026 |
| XHC Solutions Ltd | Information & communication | 2016 |
| XL Properties Limited | Construction | 1995 |
| XLP Holdings Ltd | Real estate | 2021 |
| XO Elite Limited | Education | 2021 |
| Yellowcog Limited | Manufacturing | 2010 |
| Yendell Developments Limited | Construction | 2017 |
| YES Syzygy Limited | Professional & scientific | 2005 |
| YIN2YOGA Ltd | Arts & recreation | 2022 |
| Ynys Faen Ltd | Professional & scientific | 2015 |
| Yo-Chi Ltd | Education | 2024 |
| Yogoland Ltd | Transport & logistics | 2014 |
| Young MAN & Van Limited | Administrative & support | 2002 |
| Youngblut Jacob Limited | Professional & scientific | 2016 |
| Your Ideal Tenant Limited | Real estate | 2026 |
| Your Unique Chique Limited | Wholesale & retail | 2013 |
| YSF Europe Limited | Wholesale & retail | 2005 |
| Zach's Garage Limited | Administrative & support | 2021 |
| Zandon Limited | Other services | 2018 |
| Zedmac Consulting Ltd | Information & communication | 2026 |
| Zedred Limited | Information & communication | 2004 |
| Zero Prime Limited | Financial services | 2026 |
| Zoya Limited | Professional & scientific | 2000 |