| Sunshine Blinds Limited | Other services | 2016 |
| Take Root BIO Technologies Ltd | Other services | 2023 |
| Take Root Holdings Ltd | Other services | 2023 |
| Tara Spa Ltd | Health & social care | 2025 |
| Techswing Talent Ltd | Administrative & support | 2025 |
| Tegula Reactive Roofing Limited | Construction | 2022 |
| Tegula Roof Safety Systems Limited | Construction | 2020 |
| Tegula Roofing North East Limited | Construction | 2013 |
| Telecommunications Assistance Ltd | Information & communication | 2013 |
| Telford Mclaren Joinery Contracting Ltd | Construction | 2016 |
| Telmac Developments Ltd | Construction | 2020 |
| TES (North East) Ltd | Construction | 2022 |
| TF Property (NE) Ltd | Real estate | 2023 |
| THE Brewery TAP Newcastle Ltd | Hospitality | 2018 |
| THE Dandy KAT GIN Company Ltd | Wholesale & retail | 2021 |
| THE Demi Club Ltd | Hospitality | 2022 |
| THE Diving Centre Limited | Wholesale & retail | 2006 |
| THE Eco Stall Ltd | Wholesale & retail | 2020 |
| THE Floor Wall Door Store Ltd | Wholesale & retail | 2022 |
| THE Gent Box Ltd | Extraterritorial | 2021 |
| THE Glass Works Limited | Wholesale & retail | 2016 |
| THE Grey Horse (Boldon) Limited | Real estate | 2025 |
| THE Hotspot Newcastle Ltd | Other services | 2022 |
| THE Next Level Systems Limited | Professional & scientific | 2004 |
| THE Rise of SHE CIC | Public administration | 2023 |
| THE Tipsy Nail Bar Limited | Other services | 2025 |
| THE Vintage Sofa Warehouse Ltd | Wholesale & retail | 2018 |
| Think Construction Investments Ltd | Transport & logistics | 2023 |
| Thistle DEE Ltd | Administrative & support | 2017 |
| Tiger Print North East Ltd | Manufacturing | 2023 |
| Tiny Town Boldon Limited | Health & social care | 2023 |
| TM Food Stockton Ltd | Hospitality | 2019 |
| Townglow Hotels Ltd | Hospitality | 2023 |
| Townglow Ltd | Real estate | 2011 |
| Townglow P Ltd | Hospitality | 2023 |
| Training in Care Limited | Health & social care | 2011 |
| Training in Childcare Limited | Professional & scientific | 2003 |
| Trance Ltd | Professional & scientific | 2011 |
| Trendsetter International Ltd | Wholesale & retail | 2021 |
| Trialcloud Limited | Information & communication | 2012 |
| Tribeca Berwick Ltd | Other services | 2026 |
| Turas Engagement Partners Ltd | Information & communication | 2025 |
| TXP Homes Limited | Real estate | 2022 |
| Tyneshine Ltd | Wholesale & retail | 2025 |
| Tyneside Ignite Cheerleading CIC | Arts & recreation | 2020 |
| Ultra Blue Studios Limited | Professional & scientific | 2008 |
| Uncut Marketing Services Ltd | Professional & scientific | 2026 |
| Vale Property Group Holdings Ltd | Construction | 2026 |
| Velvet Management Limited | Other services | 1977 |
| Ventus Blade Services Ltd | Manufacturing | 2025 |
| Volare Boldon Limited | Hospitality | 2017 |
| VON Doring Ltd | Wholesale & retail | 2021 |
| VTR (NE) Limited | Hospitality | 2023 |
| Washington Aerials & Satellites Ltd | Other services | 2009 |
| Wayai Limited | Information & communication | 2024 |
| Whitburn and Cleadon Junior Football Club Limited | Arts & recreation | 2024 |
| Whitleyboldon Limited | Financial services | 2018 |
| Wind Blade Services Ltd | Construction | 2020 |
| Wood N WAX Furniture Ltd | Manufacturing | 2014 |
| Wriben Consultancy Services Ltd | Other services | 2023 |
| Wright Mobility Services Ltd | Wholesale & retail | 2006 |
| Wynyard Leisure Limited | Hospitality | 2022 |
| XRP Properties Ltd | Real estate | 2025 |
| Yellow Stones Heal 1723 Ltd | Construction | 2025 |