| Westrings Travel Limited | Administrative & support | 2009 |
| Weunderstandproperty.Com Limited | Real estate | 2014 |
| Wfph Limited | Real estate | 2011 |
| WGJ 9 Limited | Arts & recreation | 2022 |
| What the Farm Ltd | Agriculture & fishing | 2023 |
| Wheatstone Projects Ltd | Professional & scientific | 2026 |
| Wheelwrights Lodge RTM Company Limited | Households | 2013 |
| Wheres My HAT Ltd | Other services | 2020 |
| Wherestreams Ltd | Administrative & support | 2024 |
| Wherewithal Ltd | Professional & scientific | 2025 |
| Whip Media Europe Limited | Other services | 2010 |
| Whisk Art Ltd | Manufacturing | 2021 |
| Whiskers & Wags Limited | Wholesale & retail | 2024 |
| Whitbys Photo-Video Limited | Professional & scientific | 1985 |
| White Cliffs Online Ltd | Information & communication | 2017 |
| White DE Groote Construction Limited | Administrative & support | 2016 |
| White DE Groote.Com Limited | Administrative & support | 2021 |
| White Electrical Contractors Ltd | Manufacturing | 2014 |
| White Griffin Limited | Professional & scientific | 2016 |
| White House Capital Management Ltd | Financial services | 2005 |
| White Knight Developments Limited | Construction | 2012 |
| White Rock Advisory Ltd | Information & communication | 2026 |
| White Rose Building Contractors Limited | Construction | 2025 |
| White Rose Landscapers Limited | Administrative & support | 2025 |
| White Rose Painting & Decorators Limited | Construction | 2025 |
| Whitefleet Logistics Ltd | Transport & logistics | 2025 |
| Whitehouse Barns Management Co Limited | Households | 2012 |
| Whitemill Developments Ltd | Construction | 2023 |
| Whites Building & Bathrooms Ltd | Construction | 2020 |
| Whites Carpentry & Building Ltd | Construction | 2026 |
| Whitevale Limited | Construction | 2003 |
| Whitlock Estate Agents Limited | Real estate | 2002 |
| Whitmore Construction Ltd | Construction | 2017 |
| Whitmore Jones Properties Limited | Financial services | 2017 |
| Whitworth Houseboats Ltd | Hospitality | 2018 |
| Whole Hearted Endeavours Ltd | Health & social care | 2016 |
| Whole Life Fitness Ltd | Other services | 2023 |
| Whyke Marsh Limited | Real estate | 2023 |
| Whyke Motors Limited | Transport & logistics | 1962 |
| Wickedly Wonderful Limited | Arts & recreation | 2003 |
| Wickens Properties Limited | Extraterritorial | 1951 |
| Widen Electronic Solutions Ltd | Manufacturing | 2009 |
| Widewater Court Limited | Households | 1973 |
| Wight Salads Limited | Extraterritorial | 2017 |
| Wihomes Ltd | Real estate | 2021 |
| Wilbur Limited | Professional & scientific | 2009 |
| Wild + Wild Wealth Management Limited | Financial services | 2014 |
| Wild KIN Club Ltd | Arts & recreation | 2026 |
| Wild Side Barbers Ltd | Other services | 2021 |
| Wildata UK Limited | Information & communication | 2009 |
| Wilder Event Hire Ltd | Information & communication | 2022 |
| Wildfire Marketing Agency Ltd | Professional & scientific | 2019 |
| Wildflower Grazing Co Ltd | Hospitality | 2026 |
| Wildness Consultancy Ltd | Professional & scientific | 2025 |
| Will Loch Construction Limited | Construction | 2016 |
| Willard Maintenance Limited | Real estate | 1991 |
| William Grace Properties Limited | Real estate | 2025 |
| William Henry Limited | Construction | 2018 |
| William O'Brien Plumbing & Heating Limited | Construction | 2003 |
| Willoughby's Home Services Limited | Administrative & support | 2024 |
| Willoughby's Windows Limited | Administrative & support | 2024 |
| Willow & EVE Ltd | Wholesale & retail | 2012 |
| Willow Court Management Company Limited | Households | 1991 |
| Willow Design and Construction Limited | Construction | 2005 |
| Willow Green Management Limited | Households | 1989 |
| Willowfield Farm Ltd | Agriculture & fishing | 2016 |
| Willowfield Homes Ltd | Construction | 2020 |
| Willowmead Maintenance Limited | Administrative & support | 2003 |
| Wilson Custom Coaching Ltd | Education | 2020 |
| Wilson Custom Guns Limited | Manufacturing | 2014 |
| Winchester Farm Limited | Real estate | 2023 |
| Windell & Co. Accountants Ltd | Professional & scientific | 2000 |
| Windmill Cinema Ltd | Information & communication | 2013 |
| Windward Road (Bosham) Management Company Limited | Households | 2005 |
| Windwise Limited | Arts & recreation | 2003 |
| Wingate Legal Consultants Ltd | Professional & scientific | 2019 |
| Wingham Timber & Mouldings Limited | Manufacturing | 1981 |
| Winkhaus Law Limited | Professional & scientific | 2015 |
| Winter's Moon Limited | Wholesale & retail | 2025 |
| Winthrop Ltd | Information & communication | 2018 |
| Winwood Estates (Sussex) Limited | Real estate | 2008 |
| Wisely & Co Enterprises Ltd | Wholesale & retail | 2024 |
| Wisely Ventures Ltd | Wholesale & retail | 2022 |
| Wisetiger Ltd | Information & communication | 2017 |
| Wisewords Marketing Ltd | Information & communication | 2023 |
| Wishart Consulting LLP | | 2022 |
| Wishbone Cosmetics Limited | Wholesale & retail | 2021 |
| Wiston Farms Limited | Agriculture & fishing | 1983 |
| Wittering Designs Ltd | Construction | 2023 |
| Wittering Developments Ltd | Real estate | 2016 |
| Wittering Eco Ltd | Wholesale & retail | 2019 |
| Wittering Homes Ltd | Real estate | 2017 |
| Wittering Kitchen Ltd | Hospitality | 2026 |
| Wittering Pet Store Ltd | Wholesale & retail | 2019 |
| Wittering Surf Ltd | Wholesale & retail | 2015 |
| Wittering WET & Wild Adventures Ltd | Arts & recreation | 2020 |
| Wittering Workshop Ltd | Other services | 2025 |
| Witterings Ice Cream Parlour Ltd | Wholesale & retail | 2025 |
| Witterings Vets Limited | Professional & scientific | 2016 |
| Wjgl Limited | Professional & scientific | 2019 |