| Tasty WOK Inn Limited | Hospitality | 2016 |
| Tatc Limited | Wholesale & retail | 2011 |
| Tattoo Accountants Ltd | Professional & scientific | 2018 |
| Tattoo Smarter Ltd | Professional & scientific | 2023 |
| Tattylynn Ltd | Wholesale & retail | 2023 |
| Tatwood Puppets Ltd | Arts & recreation | 2018 |
| Tauseef Empired Ltd | Wholesale & retail | 2025 |
| Tavana Ltd | Hospitality | 2018 |
| Tawheed Newcastle Islamic Centre Ltd | Other services | 2023 |
| Tawnies Ltd | Wholesale & retail | 2019 |
| Taxi Accident Helpline Ltd | Administrative & support | 2014 |
| Taxi CAB Services (Cumberland) Limited | Transport & logistics | 2026 |
| Taxi CAB Services (Durham) Limited | Transport & logistics | 2020 |
| Taxi CAB Services (Newcastle) Limited | Transport & logistics | 2020 |
| Taxi CAB Services (North Tyneside) Limited | Transport & logistics | 2020 |
| Taxi CAB Services (Northumberland) Limited | Transport & logistics | 2020 |
| Taxi CAB Services (South Tyneside) Limited | Transport & logistics | 2020 |
| Taxi CAB Services (Sunderland) Limited | Transport & logistics | 2020 |
| Taxi CAB Services (Wolverhampton) Limited | Transport & logistics | 2022 |
| Taxreturnsbynet Limited | Professional & scientific | 2000 |
| Taylor Fredericks Limited | Professional & scientific | 1999 |
| Taylor Hartley Ltd | Financial services | 2004 |
| Taylor Made (NE) Ltd | Construction | 2020 |
| Taylor Made Investments Limited | Real estate | 2005 |
| Taylor Made Media Ltd | Professional & scientific | 2023 |
| Taylor Made Properties N.E Ltd | Construction | 2025 |
| Taylor Ryder Limited | Real estate | 2023 |
| Taylor Taylor Homes (UK) Limited | Real estate | 2020 |
| Taylor Taylor Homes Limited | Construction | 2017 |
| Taylor Taylor Investments Limited | Real estate | 2021 |
| Taylor Walker Property Investments Ltd | Real estate | 2017 |
| Taylor's Field Drainage Disposal Company Limited | Construction | 2004 |
| Taylor-Douglas Property Limited | Real estate | 2025 |
| Taylor-James Limited | Transport & logistics | 2026 |
| Taylor-Made Marketing Incorporation Ltd | Wholesale & retail | 2020 |
| Taylored Business Development Ltd | Other services | 2022 |
| Taylors Body Repair Limited | Wholesale & retail | 2017 |
| Taylors Electrical NE Ltd | Construction | 2025 |
| TAZ Enterprises Ltd | Wholesale & retail | 2024 |
| TB Holdings NE Ltd | Professional & scientific | 2025 |
| TB Investment Properties Limited | Real estate | 2025 |
| Tbhc Ltd | Real estate | 2013 |
| TBP Commercial Finance Ltd | Administrative & support | 2025 |
| TBT 2021 Limited | Financial services | 2021 |
| TBT Catering Limited | Hospitality | 2014 |
| TBT North Limited | Hospitality | 2021 |
| TBT South Limited | Hospitality | 2021 |
| TC Business Services Ltd | Hospitality | 2019 |
| TC Couriers Ltd | Transport & logistics | 2020 |
| TC DES RES Limited | Real estate | 2016 |
| TC Machining Limited | Manufacturing | 2026 |
| TCB Practice Limited | Financial services | 2020 |
| Tcbt Ltd | Health & social care | 2014 |
| TCC Group Ltd | Arts & recreation | 2024 |
| Tcca Limited | Other services | 2001 |
| Tcdm Enterprises Limited | Financial services | 2024 |
| TCF Trading Ltd | Health & social care | 2025 |
| Tchoungui Ventures Limited | Real estate | 2017 |
| TCL at Home Ltd | Professional & scientific | 2017 |
| TCU Group Ltd | Wholesale & retail | 2007 |
| TD Multimedia Limited | Information & communication | 2013 |
| TDC Nominees Limited | Administrative & support | 2009 |
| TDE Online Limited | Wholesale & retail | 2020 |
| TDG Brand Communications Limited | Professional & scientific | 1953 |
| TDG Holdings Limited | Professional & scientific | 1994 |
| TDH Entertainment Ltd | Arts & recreation | 2016 |
| TDL Building & Joinery Services Ltd | Construction | 2026 |
| TDM Prestige Motor Works Limited | Wholesale & retail | 2022 |
| TDR Training Limited | Education | 2001 |
| TDS Holdings Group Limited | Information & communication | 2025 |
| Tea Chest Trading Ltd | Wholesale & retail | 2014 |
| Tea Consulting Services Ltd | Education | 2024 |
| Teal and Hawthorn Logistics Ltd | Transport & logistics | 2015 |
| Teal Technologies Ltd | Professional & scientific | 2014 |
| Team Excelerator Limited | Professional & scientific | 2020 |
| Team Festive Ltd | Professional & scientific | 2017 |
| Team Gosforth Football Club Limited | Arts & recreation | 2013 |
| Team Marvel Ltd | Professional & scientific | 2016 |
| Team Oscar Ltd | Other services | 2017 |
| Team Valley Car & Van Ltd | Wholesale & retail | 2026 |
| Team Valley Hand Car Wash Ltd | Wholesale & retail | 2015 |
| Team Valley Nursery Limited | Education | 2005 |
| Teamnefitness Ltd | Arts & recreation | 2024 |
| Teandra Ltd | Hospitality | 2026 |
| Teayempo Ltd | Hospitality | 2019 |
| TEB Partnership Limited | Other services | 2015 |
| TEC GAS Limited | Construction | 2022 |
| Tec-Con(Durham) Limited | Information & communication | 2018 |
| Tech NXT GEN Ltd | Information & communication | 2023 |
| Tech Pickle Studios Ltd | Information & communication | 2022 |
| Tech X Consultancy Limited | Information & communication | 2023 |
| TECH2REPAIR Ltd | Wholesale & retail | 2025 |
| Techbio Ltd | Administrative & support | 2024 |
| Techie Business Ltd | Wholesale & retail | 2025 |
| Techjumpstart Hub CIC | Information & communication | 2024 |
| Techloom Innovations Ltd | Information & communication | 2025 |
| Techn Consulting Ltd | Information & communication | 2019 |
| Technical Draughting Solutions Limited | Professional & scientific | 2017 |
| Technical Hosting Ltd | Extraterritorial | 2023 |
| Technical Integrity Management Services Ltd. | Wholesale & retail | 2018 |