| Techstylelondon Limited | Wholesale & retail | 2018 |
| Techstyleuk Ltd | Wholesale & retail | 2018 |
| Techure Ltd | Wholesale & retail | 2010 |
| Techvenus Solutions Ltd | Information & communication | 2023 |
| Techvolt Ltd | Other services | 2024 |
| Techzilla Solutions Ltd | Information & communication | 2024 |
| Tecknologia Limited | Information & communication | 2019 |
| Tecktribe Solutions Ltd | Information & communication | 2023 |
| Tecmedia Services Limited | Information & communication | 1995 |
| Tecocraft Ltd | Information & communication | 2017 |
| Tecsew Limited | Manufacturing | 2002 |
| Teddington Eyecare Limited | Health & social care | 2026 |
| Teddy Mummies Ltd | Wholesale & retail | 2021 |
| Tedlogic Limited | Information & communication | 2010 |
| Tedqiq Ltd | Professional & scientific | 2012 |
| TEE & Co. Limited | Administrative & support | 2010 |
| TEE ZEE Digital Limited | Wholesale & retail | 2017 |
| Tee's Game Factory Ltd | Wholesale & retail | 2024 |
| Tee-Em (Trading) Ltd | Wholesale & retail | 2018 |
| Tee-Em (UK) Ltd | Wholesale & retail | 2012 |
| Tee-Em Properties Ltd | Real estate | 2022 |
| Teea&Co London Limited | Hospitality | 2023 |
| Teebah Travel Ltd | Administrative & support | 2005 |
| Teefashionlab.Com Ltd | Wholesale & retail | 2023 |
| Teeflyer Ltd | Wholesale & retail | 2022 |
| Teejay Universal Ltd | Transport & logistics | 2024 |
| Teekay Consulting Limited | Real estate | 2006 |
| Teepoo Limited | Wholesale & retail | 2021 |
| Tees Property Management Services & Solutions Limited | Construction | 2022 |
| Teesside Homes Limited | Construction | 2017 |
| Teezappz Creations Ltd | Information & communication | 2026 |
| Tega Innovations Ltd | Construction | 2024 |
| Tehlka Caterers Ltd | Hospitality | 2021 |
| Tehxeeb London Limited | Wholesale & retail | 2018 |
| Teide Horizons Ltd | Financial services | 2026 |
| TEJ Print Ltd | Wholesale & retail | 2012 |
| Tejpat Ltd | Wholesale & retail | 2025 |
| Tejvir Ltd | Manufacturing | 2020 |
| TEK Direct UK Limited | Wholesale & retail | 2013 |
| TEK Merch Ltd | Wholesale & retail | 2021 |
| Tekbek Capital (UK) Limited | Professional & scientific | 2018 |
| Tekbek OIL & GAS Limited | Mining & quarrying | 2019 |
| Tekbright Systems Ltd | Information & communication | 2013 |
| TEKNOV8 Distribution Limited | Information & communication | 2016 |
| Tekvio Solutions Ltd | Information & communication | 2025 |
| Telebridge Communications Limited | Information & communication | 2010 |
| Teleformation Ltd | Information & communication | 2021 |
| Teleios Collective Ltd | Wholesale & retail | 2024 |
| Telephone Help Limited | Wholesale & retail | 2021 |
| Teler Limited | Wholesale & retail | 2020 |
| TELEV8 Limited | Administrative & support | 2021 |
| Telin Limited | Hospitality | 2026 |
| Tellaris Ltd | Construction | 2022 |
| Telsonco Ltd | Wholesale & retail | 2024 |
| Telus Getaways Limited | Administrative & support | 2025 |
| TEM Essex Ltd | Real estate | 2024 |
| Temerario Ltd | Information & communication | 2025 |
| Templatesilk Ltd | Professional & scientific | 2022 |
| Temple Aesthetics & Training Ltd | Other services | 2024 |
| Templewestwood Property Ltd | Real estate | 2018 |
| TEN CHI (UK) Limited | Real estate | 2016 |
| TEN Eighty Eight Limited | Real estate | 2019 |
| TEN Enterprises Ltd | Other services | 2024 |
| TEN Marc Group Ltd | Construction | 2026 |
| TEN TEN Technology Ltd | Information & communication | 2023 |
| Tenancies Solved Ltd | Hospitality | 2013 |
| Tendency Ltd | Wholesale & retail | 2022 |
| Tender Excellence Ltd | Other services | 2024 |
| Tendle Ltd | Information & communication | 2026 |
| Tenerife Villas Limited | Administrative & support | 2011 |
| Teniolatime Ltd | Information & communication | 2020 |
| Tenny 1 Ltd | Other services | 2014 |
| Teodor Construction Ltd | Construction | 2024 |
| Terafyre Ltd | Wholesale & retail | 2025 |
| Teranga Kitchen Ltd | Hospitality | 2025 |
| Terasa Construction Ltd | Construction | 2022 |
| Teresa Hairstyles Ltd | Other services | 2017 |
| Term Trans Ltd | Transport & logistics | 2020 |
| Terra Crest Group Ltd | Financial services | 2022 |
| Terra Firma Construction Services Limited | Professional & scientific | 2015 |
| Terra Firma Ventures Limited | Real estate | 2024 |
| Terrific Solution UK Ltd | Real estate | 2020 |
| TERTY9 Limited | Information & communication | 2014 |
| Terus Services Ltd | Construction | 2025 |
| TES Professional Ltd | Professional & scientific | 2026 |
| Tescot (UK) Ltd | Other services | 2009 |
| Test Dynamix Ltd | Information & communication | 2019 |
| Testway Traders Limited | Other services | 2022 |
| Testwood Partners Ltd | Other services | 2016 |
| Testy Hot Chicken Ltd | Hospitality | 2024 |
| Tesuk Ltd | Real estate | 2015 |
| Tetco Ltd | Information & communication | 2016 |
| Tetra Hide Ltd | Wholesale & retail | 2026 |
| Tetrad Commercial Properties Ltd | Real estate | 2025 |
| Tetrad Homes Ltd | Real estate | 2023 |
| Tetriz Ltd | Information & communication | 2022 |
| Tevyne Shop Ltd | Wholesale & retail | 2017 |
| Tewari Investment Limited | Real estate | 2013 |
| Tewson Corp Ltd | Real estate | 2023 |
| Texas Traders Ltd | Wholesale & retail | 2025 |