| Wailing Women Worldwide UK Limited | Other services | 2023 |
| Walnut Tree Retreat Ltd | Real estate | 2024 |
| Ward Consultancy and Training Limited | Professional & scientific | 2022 |
| Warm Tech Heating Limited | Construction | 2018 |
| Warran & Co Limited | Professional & scientific | 2017 |
| Warren Services Limited | Manufacturing | 1995 |
| Warren Simpson Limited | Information & communication | 2021 |
| Wattly Ltd | Professional & scientific | 2023 |
| Watton Auto Centre Ltd | Wholesale & retail | 2023 |
| Watton Candy Shop Ltd | Wholesale & retail | 2026 |
| Watton Edwards News Limited | Wholesale & retail | 2015 |
| Watton Electronic Repairs Ltd | Other services | 2026 |
| Watton Ltd | Hospitality | 2024 |
| Watton OFF Licence Ltd | Wholesale & retail | 2015 |
| Wavecollect Ltd | Wholesale & retail | 2025 |
| Wayland Holdings Limited | Financial services | 2019 |
| Wayland Plumbing and Heating Limited | Construction | 2013 |
| Wayland Produce Limited | Real estate | 2000 |
| Wayland Self Storage Ltd | Administrative & support | 2020 |
| WB Property Maintenance Ltd | Construction | 2015 |
| WB Services Norfolk Ltd | Extraterritorial | 2012 |
| Web Presenter Training Ltd | Information & communication | 2008 |
| Webb & Harris Developments Ltd | Real estate | 2025 |
| Weco (Holdings) Limited | Real estate | 1981 |
| Weco Engineering Limited | Manufacturing | 1971 |
| WEL HY Ltd | Health & social care | 2022 |
| Welch Allyn (U.K.) Limited | Manufacturing | 1989 |
| West Brothers Ltd | Manufacturing | 2015 |
| West Suffolk Motor Club Limited | Arts & recreation | 1977 |
| West Suffolk Tool and Gauge Limited | Manufacturing | 1985 |
| Westco Essex Limited | Wholesale & retail | 2007 |
| Wflt AI Limited | Information & communication | 2026 |
| Wheristore Ltd | Wholesale & retail | 2024 |
| White Sparks Electrical Ltd | Construction | 2024 |
| White Stag Property Management Ltd | Real estate | 2025 |
| Whitebridge Farm Limited | Agriculture & fishing | 2014 |
| Wifely WOO Ltd | Hospitality | 2018 |
| Wild Lands Norfolk Ltd | Arts & recreation | 2026 |
| Wildlings Shadwell Ltd | Education | 2023 |
| Wilksby Woodland Adventures Ltd | Arts & recreation | 2026 |
| William Morfoot Limited | Agriculture & fishing | 1962 |
| Williamson Brown & Brothers Ltd | Administrative & support | 2022 |
| Willow Properties Thetford Limited | Administrative & support | 2014 |
| With YOU WE Blossom CIC | Agriculture & fishing | 2026 |
| Wizz Accommodation Solutions Limited | Hospitality | 2011 |
| WL Property Holdings Ltd | Real estate | 2018 |
| Wonderworks Boutique Ltd | Wholesale & retail | 2025 |
| Woodyatt Curtains Limited | Manufacturing | 2007 |
| Worthwhile Accountancy Limited | Professional & scientific | 2012 |
| Wptrnpt Ltd. | Information & communication | 2015 |
| Wreckers International (Eastern) Limited | Manufacturing | 1988 |
| Wretham Holdings Ltd | Financial services | 2024 |
| Wrights Machine Tool Services Ltd | Manufacturing | 2017 |
| Wrights of Brettenham Limited Partnership | | 2008 |
| WTB Hair Ltd | Other services | 2025 |
| Wyatt Polishing Limited | Manufacturing | 2011 |
| X-Form Engineering Limited | Manufacturing | 1996 |
| Xingshengquan Ltd | Wholesale & retail | 2026 |
| Yeoldbookworms Ltd | Wholesale & retail | 2015 |
| Your Elegant Presence Ltd | Other services | 2026 |
| Zappyflo Limited | Information & communication | 2025 |
| ZARASAI77 Ltd | Administrative & support | 2025 |
| ZEN Carz & Classics Ltd | Wholesale & retail | 2023 |
| Zeus TM Ltd | Construction | 2026 |
| ZOE & Will Limited | Hospitality | 2025 |
| ZWE Logistics Ltd | Transport & logistics | 2023 |
| Zyarat Ltd | Wholesale & retail | 2017 |