| Wolfgang Capital Partners LLP | | 2026 |
| Wolviston Joinery Ltd | Construction | 2016 |
| Wombat Wisdom Coffee Company Ltd | Wholesale & retail | 2026 |
| Women Empowerment and Wellness Network CIC | Administrative & support | 2017 |
| Wood Burner and Chimney Services Ltd. | Construction | 2021 |
| Woodland Stove Centre Ltd | Construction | 2015 |
| Woodland Thinnings Limited | Agriculture & fishing | 2013 |
| Woodmill Enterprise Ltd | Administrative & support | 2017 |
| Woodmill Property Investments Ltd | Real estate | 2018 |
| Woodside Classic Sports Cars Ltd | Administrative & support | 2021 |
| Woodside Investment Funds Ltd | Construction | 2022 |
| Woodside Property Services (NE) Limited | Construction | 2011 |
| Woodtech Drylining Ltd | Construction | 2022 |
| Woofs Academy Limited | Other services | 2019 |
| Woofs N Scruffs Limited | Other services | 2018 |
| Woolwich Consultancy Limited | Professional & scientific | 2022 |
| Word OUT Media Limited | Information & communication | 2017 |
| Working Line Limited | Information & communication | 2025 |
| Workington Engineering Limited | Manufacturing | 2019 |
| Workstay SA Ltd | Hospitality | 2026 |
| Worktop Expert Ltd | Construction | 2025 |
| World of Brands Retail Limited | Wholesale & retail | 2021 |
| World Wind Wind Ltd | Construction | 2023 |
| Worle Dental Management Ltd | Health & social care | 2020 |
| WOW Chinese Ltd | Hospitality | 2025 |
| WOW Property Ltd | Real estate | 2024 |
| WP Renewable Energy Ltd | Energy | 2024 |
| WQR Ltd | Health & social care | 2021 |
| Wraith Properties Ltd | Real estate | 2025 |
| Wraved Ltd | Wholesale & retail | 2024 |
| Wrekenton Auto Supplies Limited | Wholesale & retail | 1984 |
| Wrekenton EYE Centre Limited | Wholesale & retail | 2001 |
| Wrekenton High Street Pizza Ltd | Hospitality | 2019 |
| Wren Investments Ltd | Financial services | 2024 |
| Wreshner Ltd | Real estate | 2017 |
| Wright Digital Marketing Limited | Information & communication | 2025 |
| WTN Rigging Limited | Administrative & support | 2019 |
| WUD Studio Ltd | Other services | 2024 |
| Wunstar Professional Accountancy Services Ltd | Professional & scientific | 2023 |
| WX Geoservices Limited | Other services | 2024 |
| Wynd Flats Limited(The) | Hospitality | 1981 |
| Xcoat Limited | Manufacturing | 2020 |
| Xenia Chefs Limited | Administrative & support | 2025 |
| Xenia Recruitment Ltd | Administrative & support | 2021 |
| Xertex Solutions Ltd | Information & communication | 2025 |
| Xiang Gang Limited | Real estate | 2019 |
| XL Team Ltd | Health & social care | 2022 |
| Xmoov Ltd | Hospitality | 2025 |
| XR Therapeutics Limited | Information & communication | 2020 |
| Xtension-Connexion Ltd | Other services | 2013 |
| XTR Engineering Ltd | Professional & scientific | 2011 |
| Y & D Properties Ltd | Real estate | 2020 |
| Y G Music Ltd | Information & communication | 2018 |
| Y&I Properties NE Ltd | Real estate | 2026 |
| Yaani Motor Group Ltd | Wholesale & retail | 2025 |
| Yarm Healthcare Ltd | Real estate | 2013 |
| Yarm Property Care Ltd | Real estate | 2018 |
| Yarm View Limited | Hospitality | 2014 |
| Yarra Limited | Wholesale & retail | 2023 |
| Yarrow Property Providers Limited | Real estate | 2018 |
| Yasmin Loza Ltd | Health & social care | 2021 |
| Yasmina’S Beauty Spot Ltd | Other services | 2020 |
| Yatton Dental Management Ltd | Health & social care | 2020 |
| Ybs(Sl) Ltd | Financial services | 2019 |
| YCH Consultancy Limited | Professional & scientific | 2018 |
| YD Properties Ltd | Real estate | 2017 |
| Yehlex (UK) Limited | Wholesale & retail | 2003 |
| Yellow Umbrella Lettings Limited | Real estate | 2023 |
| Yeshiva Gedola Nezer Hatorah | Education | 2018 |
| Yeshl Ltd | Real estate | 2020 |
| YG Capital Ltd | Real estate | 2019 |
| YI Training Ltd | Education | 2025 |
| Yingibo Apartments Ltd | Real estate | 2023 |
| Yisdun Ltd | Real estate | 2019 |
| YLM Homes Limited | Real estate | 2024 |
| YNF International Ltd | Manufacturing | 2025 |
| Yogo Investments Limited | Financial services | 2002 |
| Yoshor Ltd | Real estate | 2018 |
| Young Beauty Services Limited | Other services | 2016 |
| Young Womens Project | Education | 2014 |
| Younique Boutique Limited | Manufacturing | 2025 |
| Younique Consulting Limited | Professional & scientific | 2026 |
| Your Artificial Grass Cumbria Ltd | Administrative & support | 2021 |
| Your City Location Ltd | Real estate | 2018 |
| Your Local Stores North East Ltd | Wholesale & retail | 2019 |
| Your Mindspace Ltd | Public administration | 2025 |
| Your Money Solutions Limited | Professional & scientific | 2010 |
| Your North East Limited | Information & communication | 2021 |
| Your Perfect Car Ltd | Wholesale & retail | 2015 |
| Your Vans Ltd | Transport & logistics | 2016 |
| Your Voice Counts | Health & social care | 2008 |
| Your Wedding Boutique Ltd | Wholesale & retail | 2022 |
| Your Workshop CIC | Arts & recreation | 2013 |
| Yourfilm Limited | Information & communication | 2007 |
| Youstore (Caravans) Ltd | Transport & logistics | 2012 |
| Youth Focus North East | Health & social care | 2003 |
| YR Capital Ltd | Real estate | 2025 |
| YS Northern Limited | Other services | 2017 |
| YTL Investment Ltd | Real estate | 2024 |
| Yummies Felling Ltd | Hospitality | 2025 |