| Taxation Holdings Ltd | Extraterritorial | 2023 |
| Taxen UK Ltd | Professional & scientific | 2025 |
| Taxi Rentals (London) Limited | Administrative & support | 2015 |
| Taxi Vintage Limited | Wholesale & retail | 2017 |
| Taxpayer Fairness Ltd | Other services | 2022 |
| Taxsure Accountants Limited | Professional & scientific | 2023 |
| TAY Trading Ltd | Hospitality | 2023 |
| Taybur Consulting Ltd | Professional & scientific | 2020 |
| Taylan Taxi's Limited | Wholesale & retail | 2015 |
| Taylor Aviation Solutions Ltd | Transport & logistics | 2021 |
| Taylor Carpentry (EA) Ltd | Construction | 2021 |
| Taylor Drift Management Company Limited | Households | 2018 |
| Taylor Family Services Ltd | Health & social care | 2021 |
| Taylor Investigations Limited | Administrative & support | 2016 |
| Taylor Made Event Management Limited | Professional & scientific | 2015 |
| Taylor Made Property B Management Limited | Households | 2014 |
| Taylor Morrison Ltd | Construction | 2015 |
| Taylor Property Limited | Real estate | 2004 |
| Taylor-Hyde Construction Ltd | Construction | 2024 |
| Taylored Storage & Parking Ltd | Transport & logistics | 2004 |
| Taylormade Consultancy Limited | Professional & scientific | 2019 |
| Taylor’S Barber Shop NR1 Ltd | Other services | 2019 |
| Tayshan Hayden-Smith Ltd | Professional & scientific | 2020 |
| Taythwaite Construction Ltd | Manufacturing | 2025 |
| Tayvest Limited | Real estate | 1988 |
| TB Racing Ltd | Arts & recreation | 2024 |
| TBA Raven Ltd | Financial services | 2022 |
| Tbgin Holdings Ltd | Financial services | 2018 |
| Tbgin Ltd | Wholesale & retail | 2017 |
| TBL Group Limited | Financial services | 2004 |
| Tbmc Events Limited | Other services | 2023 |
| TBN Healthcare Limited | Health & social care | 2016 |
| TBN People Support Limited | Health & social care | 2019 |
| TBN Properties Group Ltd | Real estate | 2026 |
| TBS Norwich Limited | Professional & scientific | 2008 |
| TC Farnell Clarke Limited | Professional & scientific | 2024 |
| TC Quantum Ltd | Other services | 2019 |
| Tcbc 2019 Limited | Wholesale & retail | 2004 |
| Tcfc Partners LLP | | 2025 |
| TCI Services Limited | Administrative & support | 1997 |
| Tcjm Ltd | Wholesale & retail | 2020 |
| Tcou at Home Ltd | Education | 2021 |
| TD Exterior Cleaning Company Limited | Administrative & support | 2021 |
| TDA Live Ltd | Other services | 2014 |
| Tdbn Ltd | Other services | 2015 |
| TDC Developments Ltd | Construction | 2025 |
| TDG Property Development Ltd | Construction | 2026 |
| TDP Builders Limited | Construction | 2003 |
| TDP Enterprise Limited | Hospitality | 2011 |
| TDR Sheds & Landscaping Ltd | Administrative & support | 2023 |
| TDS Bookkeeping Ltd | Professional & scientific | 2024 |
| TDS Engineering Limited | Construction | 2016 |
| Teach Safer Ltd | Education | 2025 |
| Teacher Scientist Network | Education | 2002 |
| Teaching AS Story-Making CIC | Education | 2025 |
| Teachwell Ltd | Administrative & support | 2015 |
| Teafuelled Films Limited | Information & communication | 2020 |
| Teague Learning Consultancy Ltd | Education | 2025 |
| Team JDS Scaffolding Limited | Construction | 2025 |
| Team Orange Limited | Administrative & support | 2025 |
| Team P&J Limited | Wholesale & retail | 2026 |
| Team Pick Limited | Real estate | 2018 |
| Team Tenzing Ltd | Professional & scientific | 2018 |
| Team@Cambridge Limited | Wholesale & retail | 2018 |
| Teamancer Studios Ltd | Information & communication | 2024 |
| Teapot Catering Limited | Hospitality | 2016 |
| Teas & Co. Ltd | Other services | 2025 |
| Tebble Technology Limited | Wholesale & retail | 2016 |
| Tech and Toy Store Ltd | Wholesale & retail | 2015 |
| Tech Autos Ltd | Manufacturing | 2020 |
| Tech Educators Ltd | Education | 2021 |
| Tech Resolvers Ltd | Other services | 2022 |
| Tech Scaffolding (East Anglia) Ltd | Construction | 2022 |
| Techark Ltd | Information & communication | 2023 |
| Techeds Limited | Manufacturing | 2015 |
| Techify Business Technologies Ltd | Information & communication | 2024 |
| Techish Limited | Professional & scientific | 2020 |
| Technical Design Services (Norwich) Limited | Professional & scientific | 1984 |
| Technikos LLP | | 2006 |
| Technique Facilitas Engineering Ltd. | | 1991 |
| Technique Recruitment Solutions Ltd | Administrative & support | 2012 |
| Technology Growth Holdings Limited | Financial services | 2018 |
| Technology Growth Ventures Limited | Information & communication | 2017 |
| Techo Construction Ltd | Construction | 2017 |
| Techvelocity Ltd | Information & communication | 2018 |
| Tecnia Limited | Information & communication | 2007 |
| Tecplicity Limited | Information & communication | 2019 |
| Tectask Limited | Information & communication | 2009 |
| Tecton Developments Limited | Construction | 2017 |
| Tecton Group Limited | Financial services | 2020 |
| Tecton Property Limited | Real estate | 2020 |
| TED Estates Ltd | Real estate | 2024 |
| Tedofit Limited | Real estate | 2019 |
| Teds Room Limited | Professional & scientific | 2012 |
| Tee's Primary Care Services Limited | Professional & scientific | 2021 |
| Teebs Consulting Ltd | Professional & scientific | 2022 |
| Teejay Toomer Logistics Ltd | Transport & logistics | 2025 |
| Teessef Property Services Ltd | Construction | 2015 |
| Teeup Golf Limited | Other services | 2024 |
| Teffont Business Systems Limited | Other services | 1978 |