| Theodore Benson Ltd | Administrative & support | 2024 |
| Thomas Ronald Properties Limited | Real estate | 2021 |
| TJM Driver Ltd | Transport & logistics | 2026 |
| TLR Flooring Ltd | Construction | 2025 |
| TM Consultancy NE Ltd | Transport & logistics | 2022 |
| Top Notch Timber (NE) Ltd | Manufacturing | 2020 |
| Torelli Coffee Limited | Wholesale & retail | 2022 |
| Total Fire Maintenance Limited | Administrative & support | 2009 |
| TRI Circle Exterior Cleaning Ltd | Administrative & support | 2026 |
| Trimmers Garden, Property, Ground Maintenance Ltd | Construction | 2020 |
| Truck Services 90 Limited | Wholesale & retail | 2012 |
| Turbo Gleam UK Ltd | Administrative & support | 2025 |
| Tweed Development Planning Ltd | Professional & scientific | 2014 |
| Twinway LGV Driver Training Ltd | Education | 2019 |
| Tyne Wear Tees Limited | Transport & logistics | 2026 |
| UK Online for Business Ltd | Information & communication | 2025 |
| UK Tree Services Ltd | Administrative & support | 2025 |
| Ultimate Leisure Limited | Hospitality | 2021 |
| Ultra Care Solutions Ltd | Agriculture & fishing | 2025 |
| Unchained Properties Ltd | Real estate | 2016 |
| Useaitoday Ltd | Information & communication | 2024 |
| Utilities Manager Limited | Information & communication | 2010 |
| Vintage Vantage Media Limited | Information & communication | 2025 |
| Visiontroupe Ltd | Administrative & support | 2019 |
| Vortexcore Systems Ltd | Information & communication | 2026 |
| W Wilson Recovery Services Ltd | Transport & logistics | 2024 |
| Wajid Mehmood Seller Ltd | Wholesale & retail | 2025 |
| Warren Properties (NE) Limited | Construction | 2006 |
| Waste Away North East Limited | Water & waste | 2024 |
| Wayward Storm Enterprises Ltd | Wholesale & retail | 2018 |
| West Grange Estates Limited | Administrative & support | 2017 |
| Willoe Management Company Limited | Hospitality | 2006 |
| Windlestone Estates (Enabling Development) Limited | Construction | 2024 |
| Windlestone Estates (High Littleton) Limited | Professional & scientific | 2024 |
| Wingwell Systems Ltd | Professional & scientific | 2020 |
| Winstoninc Ltd | Professional & scientific | 2025 |
| Winter Project Management Limited | Construction | 2013 |
| WL Roadworks Limited | Construction | 2025 |
| WOK Inn Takeaway Ltd | Hospitality | 2024 |
| Woodham Futures Ltd | Real estate | 2022 |
| Woodham Golf and Leisure Limited | Arts & recreation | 2014 |
| Workpulse Consulting and Analytics Ltd | Professional & scientific | 2025 |
| Worton Utilities Ltd | Energy | 2015 |
| Yorkpres (UK) Limited | Professional & scientific | 2025 |
| Your Property Locator Ltd | Real estate | 2019 |
| Zaneris Ltd | Wholesale & retail | 2025 |
| Zazz Dance & Performing Arts Ltd | Education | 2017 |
| Zazz Theatre Ltd | Arts & recreation | 2014 |
| Zone Trading Consultancy Ltd | Professional & scientific | 2019 |