| Will Draper Garden Design Limited | Administrative & support | 2014 |
| Will Kirkman Media Limited | Professional & scientific | 2024 |
| Will Tyler Consulting Ltd | Professional & scientific | 2016 |
| Will Vape Limited | Wholesale & retail | 2024 |
| Will's Norfolk Lawns Limited | Administrative & support | 2021 |
| Willbas Limited | Construction | 2017 |
| Willder IT Consultancy Limited | Information & communication | 2013 |
| Willgrass MBO Ltd | Financial services | 2012 |
| Willgrass Wealth Management Ltd | Financial services | 2023 |
| William and Herbert Ltd | Wholesale & retail | 2019 |
| William Carter Plumbing and Heating Ltd | Construction | 2015 |
| William Clarke (Livestock) Limited | Agriculture & fishing | 2011 |
| William Gaymer (Booton) Limited | Agriculture & fishing | 1960 |
| William James Antiques & Interiors Limited | Wholesale & retail | 2003 |
| William Jones (Farms) Limited | Agriculture & fishing | 1961 |
| William Mace & Bros. Limited | Professional & scientific | 1974 |
| William Seaman (Honingham) Limited | Extraterritorial | 1981 |
| William Wright & Sons (Farmers) Limited | Agriculture & fishing | 1970 |
| William Young (Dereham) Limited | Agriculture & fishing | 1955 |
| Williams & Barrett Ltd | Professional & scientific | 2021 |
| Williams CGI Ltd | Professional & scientific | 2021 |
| Willica Limited | Other services | 2022 |
| Willies Wagons Limited | Administrative & support | 2021 |
| Willimott's Garden and Sports Ground Services Limited | Administrative & support | 2003 |
| Willine Ltd | Financial services | 2021 |
| Willip Limited | Information & communication | 2005 |
| Willmott Management Solutions Ltd | Professional & scientific | 2025 |
| Willow Barn Holdings Ltd | Real estate | 2017 |
| Willow Build Limited | Extraterritorial | 2011 |
| Willow Builders Limited | Construction | 1988 |
| Willow Consulting (2017) Ltd | Professional & scientific | 2017 |
| Willow Developments (Yorkshire) Ltd | Construction | 2021 |
| Willow Developments Construction Ltd | Construction | 2017 |
| Willow Farm Osteopathic Clinic Limited | Health & social care | 2005 |
| Willow Hall Properties Ltd | Real estate | 2025 |
| Willow Hands & Co Ltd | Agriculture & fishing | 2026 |
| Willow Tree Learning Ltd | Education | 2013 |
| Willow-Denby Ltd | Construction | 2023 |
| Wills Garage Ltd | Wholesale & retail | 2025 |
| Willson Strategies Ltd | Information & communication | 2024 |
| Wilson Cutting and Chamfering Ltd | Administrative & support | 2017 |
| Wilson Gladys Ltd | Hospitality | 2021 |
| Wilson Hotels Limited | Hospitality | 2000 |
| Wilson Pubs Limited | Extraterritorial | 2008 |
| Wilton Property Consultants Limited | Agriculture & fishing | 2019 |
| Wiltshire Medical Limited | Health & social care | 2015 |
| Wiltshire Norse Limited | Water & waste | 2026 |
| WIN a Bundle Ltd | Arts & recreation | 2024 |
| WIN Asian Mini Market Limited | Wholesale & retail | 2021 |
| WIN WIN LEE Ltd | Hospitality | 2026 |
| Wind Keeper Limited | Financial services | 2023 |
| Wind Maker Limited | Financial services | 2012 |
| Wind Mover Limited | Financial services | 2012 |
| Wind Power Generation Limited | Energy | 2011 |
| Wind Scylla Limited | Financial services | 2013 |
| Wind Zaratan Limited | Financial services | 2026 |
| Windemer Contractors Limited | Agriculture & fishing | 2010 |
| Windhover Close (One) Ltd | Real estate | 2025 |
| Windhover Close (Two) Ltd | Real estate | 2025 |
| Windhover Homes Ltd | Construction | 2017 |
| Windle Automotive Limited | Professional & scientific | 2026 |
| Windmill Buying Services Limited | Wholesale & retail | 1981 |
| Windmill Court Residents Association Limited | Households | 1976 |
| Windoor Care Company Ltd | Construction | 1996 |
| Window & Door Doctor Anglia Ltd | Construction | 2018 |
| Windows Plus (UK) Limited | Construction | 2003 |
| Windshare Ltd | Professional & scientific | 2004 |
| Wine School Franchises Ltd | Education | 2008 |
| Wine Ventures Ltd | Financial services | 2024 |
| Winefolk Ltd | Wholesale & retail | 2023 |
| Winegar Ltd | Professional & scientific | 2023 |
| Winfield & Winfield Limited | Information & communication | 2012 |
| Wingfield Consultants Ltd | Professional & scientific | 2022 |
| Wingtask 1995 Limited | Arts & recreation | 1995 |
| Winimy UK Ltd | Wholesale & retail | 2018 |
| Winklr Ltd | Information & communication | 2026 |
| Winna Solutions Ltd | Information & communication | 2024 |
| Winney Consultancy Ltd | Other services | 2022 |
| Winnie & Oak Ltd | Construction | 2026 |
| Winsburg Ltd | Financial services | 2014 |
| Winsor James Consulting Engineers Ltd | Professional & scientific | 2009 |
| Winstow Limited | Agriculture & fishing | 2016 |
| Winter's Brewing Company Limited | Manufacturing | 2017 |
| Winty WOO Ltd | Wholesale & retail | 2024 |
| Winusoft Web Development Ltd | Information & communication | 2021 |
| Wired Innovations Norfolk Ltd | Construction | 2025 |
| Wiremanor Limited | Real estate | 2009 |
| Wisa Safety and Training Limited | Professional & scientific | 2014 |
| Wisborough Energy Centre Limited | Energy | 2021 |
| Wisdom Partnership Ltd | Health & social care | 2014 |
| Wise Edge Limited | Information & communication | 2024 |
| Wise Frog Limited | Administrative & support | 2007 |
| Wise Green Energy Limited | Administrative & support | 2013 |
| Wise Monkey DJS Limited | Arts & recreation | 2013 |
| Wise OWL Cider Ltd | Manufacturing | 2012 |
| Wise OWL Conferences and Consulting Ltd | Education | 2014 |
| Wise Plumbing Ltd | Construction | 2024 |
| Wise Project Services Ltd | Professional & scientific | 2024 |
| Wise Studios Limited | Professional & scientific | 2001 |
| Wisecoda Ltd | Information & communication | 2024 |