| TAI Tech SOL Ltd | Wholesale & retail | 2021 |
| Taikura Property Limited | Real estate | 2024 |
| Tailor My Consultancy Ltd | Professional & scientific | 2018 |
| Tailored Care Companions Ltd | Health & social care | 2025 |
| Tailored Health Care 4 YOU Limited | Health & social care | 2025 |
| Tails and Eco Trails Ltd | Wholesale & retail | 2025 |
| Tain and Fearn Area Medical Practice Limited | Extraterritorial | 2014 |
| Taiwo Property Ltd | Real estate | 2021 |
| TAJ Mahal Amble Ltd | Hospitality | 2019 |
| Tajwani Properties Ltd | Real estate | 2025 |
| Tajwani Trading Ltd | Wholesale & retail | 2025 |
| Takachi Ltd | Hospitality | 2024 |
| Takam Realty Limited | Real estate | 2021 |
| Take a Break Staycations Ltd | Hospitality | 2021 |
| Take a Walk on the Tyneside Ltd | Agriculture & fishing | 2020 |
| Take the Shake Ltd | Hospitality | 2022 |
| Takeawayy Town Ltd | Hospitality | 2026 |
| Taketh Black Ltd | Arts & recreation | 2018 |
| Takumi London Atelier Ltd | Wholesale & retail | 2026 |
| Talbot House Children's Charity Limited | Education | 1995 |
| Talbro Limited | Real estate | 2026 |
| Talent Embedded Limited | Administrative & support | 2025 |
| Talent Forge Limited | Information & communication | 2025 |
| Talent Insight Group (High Growth) Limited | Administrative & support | 2022 |
| Talent Insight Group Limited | Administrative & support | 2017 |
| Talent Insight Group Trustee Limited | Professional & scientific | 2026 |
| Tales in Sombre Tones CIC | Arts & recreation | 2022 |
| Talha and Tabish Ltd | Health & social care | 2010 |
| Tali Homes Limited | Real estate | 2022 |
| Talk IT Work IT Ltd | Information & communication | 2019 |
| Talk Publishing Limited | Professional & scientific | 2005 |
| Talking House North East Ltd | Health & social care | 2023 |
| Talking Taxis CIC | Health & social care | 2023 |
| Talking Therapy Places Ltd | Real estate | 2019 |
| Tall Grass Holdings Ltd | Real estate | 2019 |
| Tallerwall Limited | Manufacturing | 2014 |
| Tallinn Trading Ltd | Arts & recreation | 2016 |
| Tally Sticks UK Community Interest Company | Information & communication | 2025 |
| Talus Performance Ltd | Professional & scientific | 2022 |
| Tamdebonix Limited | Health & social care | 2018 |
| Tamdebonix Properties Limited | Real estate | 2025 |
| Tame IT Limited | Information & communication | 2008 |
| Tamir ALI Radiology Limited | Health & social care | 2022 |
| Tamna Limited | Real estate | 2011 |
| Tamna One Limited | Real estate | 2022 |
| TAN 2 Glam Ltd | Other services | 2009 |
| TAN 4 U (Forest Hall) Limited | Other services | 2009 |
| TAN 4 U (Woodland Road) Ltd | Other services | 2008 |
| TAN 4 U Ltd | Other services | 2018 |
| TAN IT UK (Gateshead) Ltd | Other services | 2005 |
| TAN IT UK (Wallsend) Ltd | Other services | 2005 |
| Tandem Property NE Limited | Real estate | 2025 |
| Tandoori Lime Road Limited | Hospitality | 2023 |
| Tandoori Naan HUT Ltd | Hospitality | 2013 |
| Tanfield Group PLC | Financial services | 2000 |
| Tanfield Railway Trust Limited | Arts & recreation | 1996 |
| Tangletree Interiors Limited | Wholesale & retail | 2008 |
| Tango Group Limited | Wholesale & retail | 2003 |
| Tanisha Properties NE Ltd | Financial services | 2024 |
| Tank Developments (North East) Limited | Real estate | 2022 |
| Tankards Ltd | Hospitality | 2020 |
| Tankerville House Jesmond Management Limited | Real estate | 2021 |
| Tankerville Limited | Financial services | 2021 |
| Tanoli Ltd | Wholesale & retail | 2025 |
| Tanveer Singh Ltd | Health & social care | 2019 |
| Tanzanite Consulting Limited | Professional & scientific | 2022 |
| Tanzanite Leisure Limited | Hospitality | 2019 |
| Taopix Group Limited | Professional & scientific | 2016 |
| Taopix Holdings Limited | Professional & scientific | 2008 |
| Taopix Limited | Information & communication | 2007 |
| Taow Ltd | Information & communication | 2024 |
| TAP in Media Ltd | Information & communication | 2017 |
| Tapintome Ltd | Information & communication | 2023 |
| Tapn Trade Ltd | Wholesale & retail | 2023 |
| Tapyard Studios Limited | Hospitality | 2023 |
| Tara Davison Developments Limited | Construction | 2015 |
| Tarabot Security Limited | Administrative & support | 2022 |
| Tarboosh Express Ltd | Hospitality | 2025 |
| Tardigrada Ltd | Wholesale & retail | 2022 |
| Target Collections Ltd | Health & social care | 2026 |
| Target Windows Limited | Construction | 2003 |
| Tarik Barbers Ltd | Other services | 2024 |
| Tarlan Limited | Wholesale & retail | 1982 |
| Tarshis Trading Limited | Financial services | 2015 |
| TAS Alliance Services Limited | Professional & scientific | 2026 |
| Tasen Property Development Limited | Real estate | 2026 |
| Tasgil and Fanadi Residential Ltd | Wholesale & retail | 2025 |
| Task Force 42 Limited | Information & communication | 2021 |
| Taska Limited | Professional & scientific | 2021 |
| Taskifai Technologies Limited | Information & communication | 2025 |
| Taskova Ltd | Information & communication | 2025 |
| Tasmiyah Healthcare Limited | Public administration | 2017 |
| Taste of Asia Gosforth Ltd | Hospitality | 2025 |
| Taste of India (Forest Hall) Ltd | Hospitality | 2019 |
| Taste Trail Kitchen Limited | Hospitality | 2025 |
| Tasteit RKA Limited | Hospitality | 2025 |
| Tastetale Ltd | Hospitality | 2023 |
| Tastur Ltd | Hospitality | 2014 |
| Tasty Bite (West Denton) Ltd | Hospitality | 2025 |
| Tasty Tea Ltd | Hospitality | 2018 |