| Woodlands Property Lettings Ltd | Real estate | 2020 |
| Woodside Leisure Ltd | Real estate | 2012 |
| Woodside North East Property Limited | Real estate | 2010 |
| Woodside Real Estate Management Limited | Real estate | 2010 |
| Woodstock Investment Holdings Limited | Financial services | 2025 |
| Woodturning Workshop Hartlepool CIC | Arts & recreation | 2022 |
| Wordsley Associates Ltd | Professional & scientific | 2012 |
| WORKMATES2GETHER Ltd | Administrative & support | 2018 |
| Workstays EUR Ltd | Information & communication | 2026 |
| Workwood Construction Limited | Construction | 2024 |
| World Class Skills Ltd | Education | 2025 |
| Worthy Site Solutions Ltd | Professional & scientific | 2022 |
| Wright NOW Construction Ltd | Construction | 2018 |
| Wtfrng Ltd | Information & communication | 2021 |
| WW Design Ltd | Professional & scientific | 2025 |
| WW EMS Limited | Professional & scientific | 2024 |
| Wynyard Driving Ltd | Transport & logistics | 2026 |
| Wynyard LUX Watch Ltd | Arts & recreation | 2021 |
| WZ Golden Choi Limited | Hospitality | 2016 |
| X1X Communications Ltd | Information & communication | 2020 |
| Xander Doors Limited | Manufacturing | 2020 |
| Xingxing Fashion Limited | Wholesale & retail | 2025 |
| Xmplar Ltd | Professional & scientific | 2022 |
| Xplainvision Limited | Information & communication | 2025 |
| Xyon Tattoo Ltd | Wholesale & retail | 2021 |
| Yarm Lane Cafe Ltd | Other services | 2024 |
| Yarm Lane Motors Limited | Wholesale & retail | 2024 |
| Yield Investing Limited | Real estate | 2021 |
| Yield Investing SPV1 Ltd | Real estate | 2023 |
| Yield Investing SPV2 Ltd | Real estate | 2023 |
| Yield Investing SPV3 Ltd | Real estate | 2024 |
| Yield Investing SPV4 Ltd | Real estate | 2024 |
| YK Web Solutions Ltd | Information & communication | 2023 |
| York Road 1958 Limited | Extraterritorial | 2014 |
| York Road Motors Hartlepool Ltd | Wholesale & retail | 2023 |
| York Road Motors Limited | Wholesale & retail | 2025 |
| York Road Tyres and Exhausts Limited | Wholesale & retail | 2013 |
| Yorkshire Water Softeners Ltd | Water & waste | 2019 |
| Young Cleaning Site Services Limited | Administrative & support | 2025 |
| Your NRG Ltd | Wholesale & retail | 2007 |
| Your Social Ltd | Professional & scientific | 2026 |
| Your Storage Box Ltd | Transport & logistics | 2019 |
| Youssef Car Cleaning Ltd | Administrative & support | 2025 |
| Yuill Homes Limited | Professional & scientific | 2014 |
| Z.A.P.P Electrotec Ltd | Construction | 2025 |
| Zaka Rehman Ltd | Wholesale & retail | 2025 |
| Zapp Housing Ltd | Real estate | 2026 |
| Zen-Rp Ltd | Information & communication | 2016 |
| Zenith Home Solutions Maintenance Limited | Construction | 2017 |
| Zephr Technical Solutions Ltd | Administrative & support | 2010 |
| Zidane Hartlepool Ltd | Real estate | 2025 |
| Zielinski Electrical Services Ltd | Construction | 2021 |
| Zone 5 Events Ltd | Arts & recreation | 2026 |
| Zorion Engineering Ltd | Professional & scientific | 2024 |
| ZPS Consulting Limited | Professional & scientific | 2024 |
| Zulcron Leisure Ltd | Wholesale & retail | 2025 |
| Zulcron Sports Ltd | Wholesale & retail | 2020 |
| Āspada Enterprise Ltd | Wholesale & retail | 2024 |