| Wibsey Stores Ltd | Wholesale & retail | 2022 |
| Wild Ledges Ltd | Wholesale & retail | 2026 |
| Wildcat Defence Limited | Manufacturing | 2026 |
| Wildtrackpro Ltd | Professional & scientific | 2023 |
| Wilkinson Properties (North) Limited | Real estate | 2025 |
| Will Harland Offshore Services Ltd | Construction | 2023 |
| Williams Auto Parts Ltd | Wholesale & retail | 2026 |
| Williams Care Consultancy Ltd | Health & social care | 2024 |
| Williams Engineering (NE) Ltd | Construction | 2017 |
| Williams Inspection Ltd | Professional & scientific | 2022 |
| Williams Property Enterprise Ltd | Real estate | 2018 |
| Willis Performance and Investment Ltd | Wholesale & retail | 2022 |
| Willow Plant & Machinery Hire Ltd | Administrative & support | 2025 |
| Willowbank Construction Services Ltd | Construction | 2025 |
| Wills Engineering Services (WES) Limited | Professional & scientific | 2024 |
| Wilson Maritime Limited | Transport & logistics | 2014 |
| Wilsons Carpet & Flooring Ltd | Wholesale & retail | 2021 |
| Wilton Energy Limited | Energy | 2002 |
| Wilton Universal Group Limited | Professional & scientific | 2013 |
| Wiltshire Management NE Limited | Real estate | 2023 |
| Winder House Developments Limited | Construction | 2005 |
| Windmill (Heaton) Orthodontics Limited | Health & social care | 2015 |
| Window Centre Plus Ltd | Construction | 2011 |
| Windsafe Limited | Professional & scientific | 2024 |
| Winfield Projects Limited | Construction | 2026 |
| Winglet Inspections Limited | Administrative & support | 2021 |
| Wings International (Middlesbrough) Limited | Hospitality | 2016 |
| Wink & Wonder Ltd | Other services | 2025 |
| Winley Hill Contractors Limited | Agriculture & fishing | 2023 |
| Winning Post Properties Ltd | Real estate | 2022 |
| Winspur Sales and Services Limited | | 1984 |
| Winter Hall Group Limited | Financial services | 2023 |
| Winters & Wooster Site Services Ltd | Administrative & support | 2012 |
| Winterserve Ltd | Professional & scientific | 2026 |
| Wird Limited | Professional & scientific | 2018 |
| Wise Choice Safety Solutions Limited | Professional & scientific | 2023 |
| Wisteria Living Ltd | Construction | 2025 |
| Wjac-Ratech Limited | Construction | 2025 |
| WJR Wind Ltd | Construction | 2022 |
| WKE (Middlesbrough) Ltd | Water & waste | 2019 |
| WKE (Site 2) Ltd | Water & waste | 2020 |
| WL (NE) Property Limited | Real estate | 2026 |
| Wojtkowski & SON Limited | Manufacturing | 2025 |
| Woman Kynd Ltd | Wholesale & retail | 2024 |
| Women's Street Watch Middlesbrough CIC | Public administration | 2023 |
| Wood Connexions International Limited | Professional & scientific | 2024 |
| Wood Connexions Limited | Financial services | 2024 |
| Wood Floor and Beyond Limited | Construction | 2015 |
| Wood Heat Installations Limited | Construction | 2014 |
| Woodchester Consulting Services Ltd | Professional & scientific | 2022 |
| Woodenpro Limited | Wholesale & retail | 2025 |
| Woodfella's Flooring Limited | Wholesale & retail | 2016 |
| Woodford Accountancy Limited | Professional & scientific | 2026 |
| Woodhouse Developments Group Ltd | Real estate | 2026 |
| Woodlands Road Car Park Limited | Other services | 2019 |
| Woodlea Home Improvements Ltd | Construction | 2025 |
| Woodridge Production Solutions Limited | Professional & scientific | 2018 |
| Woods Engineering Limited | Construction | 2023 |
| Woods R & L Limited | Construction | 2025 |
| Woodside MOT Centre Ltd | Wholesale & retail | 2019 |
| Woodtech (Joinery) Limited | Manufacturing | 1998 |
| Woodworx JPM Ltd | Construction | 2019 |
| Woody (North East) Limited | Construction | 2022 |
| World at Your Feet Solutions Limited | Other services | 2019 |
| World Class Education Network CIC | Education | 2023 |
| World Foods NE Ltd | Hospitality | 2024 |
| World Sales Business Limited | Wholesale & retail | 2026 |
| Worldfitness Limited | Arts & recreation | 2008 |
| Worldwide Fibretek Ltd | Information & communication | 2019 |
| Worldwide Safety Services Ltd | Construction | 2025 |
| Woven Stone Commercial Ltd | Manufacturing | 2023 |
| WP Claims Limited | Other services | 2010 |
| WR Pacific Ltd | Water & waste | 2023 |
| Wray-Kerr Homes Limited | Real estate | 2020 |
| Wren and Gilbert Properties Ltd | Real estate | 2025 |
| Wright and Lambert Property Limited | Hospitality | 2025 |
| Wright Holmes Property Services Ltd | Real estate | 2018 |
| Wrightlift Ltd | Administrative & support | 2023 |
| Wrightway Digital Ltd | Information & communication | 2011 |
| Wrightwood Ltd | Wholesale & retail | 2023 |
| Write Yourself Well Ltd | Education | 2023 |
| Writer's Block North East Limited | Arts & recreation | 2010 |
| WRM Scaffolding Limited | Construction | 2016 |
| Wsam Body Works Limited | Wholesale & retail | 2026 |
| WSI Property Services Limited | Construction | 2022 |
| WSL Single PLY Systems Limited | Construction | 2017 |
| Wtee Ltd | Construction | 2026 |
| Wuciri Limited | Wholesale & retail | 2024 |
| WVH Bradford Limited | Hospitality | 2026 |
| Wyndforce Engineers Limited | Professional & scientific | 2002 |
| Wynyard Kitchen Surveyors Ltd | Manufacturing | 2020 |
| Wynyard Property Ltd | Real estate | 2020 |
| Wywait Ltd | Transport & logistics | 2024 |
| X-Cel Broadcast Limited | Information & communication | 2002 |
| X-Heat Ltd | Administrative & support | 2018 |
| Xber Ltd | Transport & logistics | 2026 |
| Xclusive Filmworks Ltd | Information & communication | 2025 |
| Xclusive Marketing Limited | Professional & scientific | 2007 |
| Xcyte Media Ltd | Professional & scientific | 2010 |
| Xendral Limited | Wholesale & retail | 2025 |