| Weeks Foods Ltd | Manufacturing | 2011 |
| Weir & Webb Ltd | Manufacturing | 2022 |
| Wellready Ltd | Wholesale & retail | 2022 |
| Welovemanfood Limited | Wholesale & retail | 2013 |
| Westrock Electrical Ltd | Manufacturing | 2009 |
| Westward Look Holdco Limited | Real estate | 2022 |
| Weyfield Court Management Company Limited | Other services | 2022 |
| Whatley Lane BSE Limited | Real estate | 2014 |
| White & Wright Ltd | Agriculture & fishing | 2020 |
| White Elms Residents Association Limited | Real estate | 1999 |
| White Star Pictures Limited | Information & communication | 2023 |
| Whites Property and Sons Ltd | Construction | 2025 |
| Whybrow Holdings Limited | Financial services | 2021 |
| Whybrow Property Solutions Ltd | Construction | 2012 |
| Whydel Building Services Limited | Construction | 2021 |
| Whymark & Moulton Limited | Professional & scientific | 2002 |
| Wilderness School Ltd | Education | 2021 |
| Wildwoods Residents Limited | Administrative & support | 1987 |
| Wilf and Bear Toys Limited | Wholesale & retail | 2026 |
| Wilkes Street Limited | Real estate | 2015 |
| Will Bishop Jewellery Design Ltd | Manufacturing | 2014 |
| Williams Lang Limited | Real estate | 2008 |
| Willowbrook Business Management Ltd | Professional & scientific | 2014 |
| Wilson Brickworks Ltd | Construction | 2017 |
| Wilton and Flower Accessories Limited | Administrative & support | 2022 |
| Wilton and Flower Ltd | Administrative & support | 2005 |
| Windam Limited | Wholesale & retail | 2008 |
| Windsor Court Management Co. (Fleet) Limited | Households | 1978 |
| Winter's Accountancy Services Limited | Professional & scientific | 2019 |
| Wipe Right Ltd | Administrative & support | 2025 |
| Wiston Capital Limited | Financial services | 2023 |
| With Leadership Ltd | Professional & scientific | 2019 |
| Withall Properties Limited | Real estate | 2000 |
| Wolfmark Studio Ltd | Information & communication | 2026 |
| Woodcote Lodge Residents Company Limited | Households | 2015 |
| Woodmerge Property Management Limited | Professional & scientific | 1991 |
| Woodpecker Nursery Ltd. | Administrative & support | 2000 |
| Woods Place Building Management Limited | Hospitality | 2000 |
| Worklo Ltd | Information & communication | 2026 |
| Worlington Management Ltd | Households | 2017 |
| WP Creative Limited | Professional & scientific | 2020 |
| WPB Groundwork & Civil Engineering Ltd | Construction | 2014 |
| Wright's Farms(Middleton)Limited | Agriculture & fishing | 1952 |
| Wrights (Middleton) Storage & Packaging Limited | Wholesale & retail | 2013 |
| Writetech Ltd | Professional & scientific | 2021 |
| Wroxham Day Boats Limited | Arts & recreation | 2020 |
| WW 2022 Ltd | Financial services | 2022 |
| Wyzkey Ltd | Information & communication | 2015 |
| Xperient LLP | | 2007 |
| Xtreme Services Limited | Wholesale & retail | 2004 |
| Yall & Yall Ltd | Wholesale & retail | 2022 |
| Yazcod Limited | Hospitality | 2019 |
| YEA Fresh Fish Ltd | Hospitality | 2025 |
| Yellow HEX Ltd | Information & communication | 2016 |
| Yorley Barn Limited | Education | 2018 |
| Your Accounting Club Ltd | Professional & scientific | 2026 |
| Zavtra Consulting Ltd | Administrative & support | 2016 |
| ZC & Sons Chauffeurs Limited | Transport & logistics | 2025 |
| Zian Express Ltd | Transport & logistics | 2024 |
| Zigis Renewables Ltd | Extraterritorial | 2011 |
| Zoes Handmade Gifts Ltd | Arts & recreation | 2021 |
| Zugbox Limited | Professional & scientific | 2020 |
| Zyva Limited | Other services | 2026 |