| White Swan Fish & Seafood Ltd | Wholesale & retail | 2025 |
| Whitefly Automation Ltd | Information & communication | 2025 |
| Whits Ltd | Mining & quarrying | 2023 |
| Whittree Energy Ltd | Construction | 2026 |
| Whittree Fire & Security Ltd | Manufacturing | 2025 |
| Whittree Ltd | Manufacturing | 2021 |
| Wickhurst Productions Limited | Financial services | 2024 |
| Wight Dental Care Limited | Health & social care | 2010 |
| Wild Steps AP CIC | Education | 2025 |
| Wildpitch Data Services Ltd | Information & communication | 2012 |
| Wilem Construction Limited | Construction | 2022 |
| Williams Driving Academy Limited | Education | 2017 |
| Williams Garage Caister Limited | Wholesale & retail | 2019 |
| Willow Farm Equestrian Ltd | Agriculture & fishing | 2021 |
| Willows Acquisitions Limited | Real estate | 2025 |
| WIN WIN Solutions Ltd | Transport & logistics | 2004 |
| Wind Elements Limited | Administrative & support | 2008 |
| Windermere Outlets Ltd | Wholesale & retail | 2018 |
| Windmill Insight Solutions Ltd | Professional & scientific | 2012 |
| Winner Winner Wholesale Ltd | Wholesale & retail | 2020 |
| Winterton Farming Limited | Agriculture & fishing | 2015 |
| Winterton Valley Estate Limited | Hospitality | 1974 |
| Wirelock Associates Limited | Information & communication | 1996 |
| Wise Health Care Services Ltd | Health & social care | 2022 |
| With Cj’S Help Ltd | Professional & scientific | 2024 |
| Wizzafest CIC | Arts & recreation | 2023 |
| WJP Plumbing & Heating Limited | Construction | 2014 |
| Wm.Bracey,Limited | Agriculture & fishing | 1945 |
| Wondrous Properties Limited | Real estate | 2021 |
| Wood Marine (East) Limited | Agriculture & fishing | 2025 |
| Wood Marine Holdings Limited | Construction | 2017 |
| Wood Marine Limited | Agriculture & fishing | 2010 |
| Woodbridge Practice Limited | Health & social care | 2012 |
| Woodmen Tree Services Limited | Agriculture & fishing | 2015 |
| Words PER Minute Limited | Administrative & support | 2014 |
| World of Beds (Great Yarmouth) Ltd | Wholesale & retail | 2025 |
| World of Smiles Limited | Health & social care | 2023 |
| Worldwide Engineering Solutions Ltd | Construction | 2004 |
| Worldwide Subworks Limited | Administrative & support | 2018 |
| Worsley Heights Scaffolding Limited | Construction | 2026 |
| WPH Inspections Limited | Mining & quarrying | 2012 |
| WPL Food Services Ltd | Wholesale & retail | 2023 |
| Wright Properties (East Anglia) Limited | Construction | 1999 |
| Wrights (Motors) Limited | Wholesale & retail | 1962 |
| WSB Care Ltd | Health & social care | 2022 |
| WT Design Ltd | Professional & scientific | 2018 |
| WU & Chen Limited | Hospitality | 2022 |
| Www.Trrs.Org Ltd | Wholesale & retail | 2005 |
| Wyldstorm Ltd | Wholesale & retail | 2018 |
| Wythe Estates Limited | Real estate | 2022 |
| Xiang Xing Ltd | Hospitality | 2017 |
| XLT Distribution Limited | Information & communication | 2016 |
| XN Technical Support Consultants Limited | Professional & scientific | 2023 |
| XS Cleaning Ltd | Administrative & support | 2022 |
| Yadadata Ltd | Information & communication | 2024 |
| Yare Beat Projects Limited | Education | 2025 |
| Yare IT Consulting Ltd | Other services | 2017 |
| Yarmouth Apartments Limited | Hospitality | 2023 |
| Yarmouth Candy Store Ltd | Wholesale & retail | 2024 |
| Yarmouth Express Ltd | Wholesale & retail | 2016 |
| Yarmouth Heat & Plumb Ltd | Construction | 2023 |
| Yarmouth Heliport Limited | Transport & logistics | 2022 |
| Yarmouth Stores,Limited(The) | Manufacturing | 1898 |
| Yash Holdings Limited | Health & social care | 2016 |
| YE Olde Vape Shoppe Limited | Wholesale & retail | 2018 |
| Yellow Brick Road Solutions Limited | Professional & scientific | 2012 |
| Yeoman Construction (Norfolk) Ltd | Real estate | 2018 |
| Yeoman Developments Ltd | Real estate | 2018 |
| YF Group (Norfolk) Ltd | Manufacturing | 2015 |
| Yffs 777 Ltd | Hospitality | 2025 |
| YOU Know the Drill Limited | Health & social care | 2021 |
| YOU Know the Drill Property Limited | Real estate | 2025 |
| Young & Co Accounting Limited | Professional & scientific | 2021 |
| Youngs Chinese Takeaway Ltd | Hospitality | 2022 |
| Yours Floor Ltd | Wholesale & retail | 2026 |
| Yummy Kebab Ltd | Hospitality | 2025 |
| Yusuf 23 Limited | Hospitality | 2019 |
| Z3 Systems Limited | Information & communication | 1999 |
| Zale Trans Ltd | Transport & logistics | 2025 |
| Zebra Balloons Ltd | Wholesale & retail | 2023 |
| Zembra Limited | Professional & scientific | 2014 |
| Zenith DP Accounts Limited | Professional & scientific | 2020 |
| Zero Carbon Heating Limited | Construction | 2022 |
| ZM Store Ltd | Wholesale & retail | 2025 |
| ZM1 Store Ltd | Wholesale & retail | 2026 |
| ZR Mobiles Ltd | Wholesale & retail | 2023 |
| ZRL Foods Ltd | Hospitality | 2023 |
| Zyonik Gaming Limited | Wholesale & retail | 2021 |