| Talex Interiors Ltd | Wholesale & retail | 2014 |
| Talha Merchant Ltd | Wholesale & retail | 2026 |
| Talk of HER Ltd | Wholesale & retail | 2025 |
| Talk Talk Mobile Phones Limited | Wholesale & retail | 1997 |
| TALK247 Limited | Other services | 2024 |
| Talking Bricks Ltd | Real estate | 2023 |
| Talking Mental Fitness Limited | Extraterritorial | 2021 |
| Tall and Small Equip Hire Ltd | Administrative & support | 2025 |
| Tall Pine Holdings Limited | Real estate | 2025 |
| Talla Cosmetics Ltd | Wholesale & retail | 2025 |
| Tally Tax Accountants Ltd | Professional & scientific | 2020 |
| Talom Limited | Health & social care | 2014 |
| Talon Security Services Ltd | Information & communication | 2022 |
| Talon Services Ltd | Wholesale & retail | 2021 |
| Tama Prestige Limited | Real estate | 2024 |
| Tamandua Limited | Professional & scientific | 2019 |
| Tamanna Entertainment Ltd | Arts & recreation | 2025 |
| Tamari Trading Limited | Wholesale & retail | 2012 |
| Tamarind Falls Properties Ltd | Real estate | 2025 |
| Tamarisk Properties Investment LLP | | 2018 |
| Tamil Cricket Academy Ltd | Education | 2015 |
| Tamil Nadu Doctors Alliance in UK & Ireland CIC | Health & social care | 2022 |
| Tamil Welfare Leicester CIC | Arts & recreation | 2026 |
| Tamimi Enterprise Ltd | Extraterritorial | 2015 |
| Tamlee Ltd | Construction | 2026 |
| Tammy Chick Designs Ltd | Professional & scientific | 2016 |
| Tamoura Limited | Manufacturing | 2026 |
| Tamra Ltd | Wholesale & retail | 2024 |
| Tams Properties Limited | Real estate | 2017 |
| Tamtu Limited | Real estate | 2017 |
| Tamutamu Trading Ltd. | Wholesale & retail | 2008 |
| Tamworth Cricket, Hockey & Squash Club Ltd | Arts & recreation | 2012 |
| Tamworth Electrical Services Ltd | Construction | 2013 |
| TAN Hawk Services Ltd | Transport & logistics | 2021 |
| TAN Rima Limited | Health & social care | 2020 |
| Tana Living Ltd | Real estate | 2024 |
| Tanac Europe Limited | Professional & scientific | 2011 |
| Tanaka Educate to Liberate CIC | Administrative & support | 2025 |
| Tanaka ETL Ltd | Education | 2020 |
| Tanashree Ltd | Other services | 2020 |
| Tanco Sciences & Engineering Ltd | Professional & scientific | 2011 |
| Tandel Investments Ltd | Real estate | 2026 |
| Tandel Restaurant Ltd | Hospitality | 2025 |
| Tandel Sea Food Ltd | Wholesale & retail | 2025 |
| Tandem Restaurants Ltd | Hospitality | 2018 |
| Tandoor Express Ltd | Hospitality | 2023 |
| Tandoor X Factor Ltd | Hospitality | 2025 |
| Tandoor&Co Ltd | Hospitality | 2026 |
| Tandoori Fresh Naan Limited | Hospitality | 2017 |
| Tandoori Naan Limited | Hospitality | 2025 |
| Tandoori Nites Limited | Hospitality | 2015 |
| Tang Property Investments Limited | Real estate | 2020 |
| Tangible CSR Ltd | Agriculture & fishing | 2024 |
| Tangible Graphics Ltd | Wholesale & retail | 2026 |
| Tangletrees Countryside Services Ltd | Agriculture & fishing | 2024 |
| Tangletrees Stables Ltd | Agriculture & fishing | 2018 |
| Tangoe Restaurant Limited | Hospitality | 2025 |
| Tani SB Ltd | Wholesale & retail | 2015 |
| Tani Sklep (SH) Ltd | Wholesale & retail | 2016 |
| Tani SNJ Ltd | Wholesale & retail | 2018 |
| Tania Gerard Digital Ltd | Administrative & support | 2024 |
| Tank Co (UK) Ltd | Wholesale & retail | 2007 |
| Tank Developments Ltd | Real estate | 2018 |
| Tank Financial Ltd | Financial services | 2013 |
| Tank Properties Leicester Limited | Hospitality | 2019 |
| Tann Synchronome Limited | Construction | 2000 |
| Tanna & Co Leicester Limited | Professional & scientific | 2005 |
| Tanna Associates Limited | Real estate | 2019 |
| Tanna Holdings Ltd | Real estate | 2024 |
| Tanna Investments Limited | Real estate | 2014 |
| Tanna Web Ltd | Professional & scientific | 2009 |
| Tanner London Limited | Wholesale & retail | 2019 |
| Tanning Basement Ltd | Other services | 2013 |
| Tanning Beds Planet Ltd | Administrative & support | 2022 |
| Tanning House Leicester Ltd | Other services | 2023 |
| Tanningzone Limited | Other services | 2014 |
| Tanolli Ltd | Wholesale & retail | 2023 |
| Tans Investments Limited | Real estate | 2015 |
| Tans Motors Ltd | Wholesale & retail | 2026 |
| Tansey Trucking Ltd | Transport & logistics | 2025 |
| Tantarian Ltd | Administrative & support | 2025 |
| Tantita Logistics Ltd | Transport & logistics | 2026 |
| Tanton Project Consulting Ltd | Professional & scientific | 2026 |
| Tantra Club Limited | Hospitality | 2024 |
| Tanu Transport Limited | Transport & logistics | 2025 |
| Tanvi HR Consulting Ltd | Administrative & support | 2023 |
| Tanvision Ltd | Health & social care | 2018 |
| Tanwood Construction Limited | Construction | 1995 |
| Tanya Harris Limited | Other services | 2005 |
| Tanz Property Group Limited | Real estate | 2022 |
| Tanzanite Ltd | Hospitality | 2025 |
| Tanzi Limited | Other services | 2022 |
| TAO Eats Ltd | Hospitality | 2021 |
| TAO Globe Ltd | Wholesale & retail | 2023 |
| TAO Homes Ltd | Real estate | 2019 |
| TAP Leagues Limited | Information & communication | 2023 |
| Tapdeal Ltd | Wholesale & retail | 2025 |
| Tape Measure Ltd | Manufacturing | 2026 |
| Tape Track Ltd | Arts & recreation | 2025 |
| Tapovan Risk Management Ltd | Administrative & support | 2025 |