| THE Simplicity Coach Limited | Professional & scientific | 2025 |
| THE Sky First Ltd | Wholesale & retail | 2025 |
| THE Solution AI Ltd | Information & communication | 2025 |
| THE Sound of Rhema Limited | Information & communication | 2026 |
| THE Stagg Inn Limited | Hospitality | 2008 |
| THE Stags Head Inn Yarlington Limited | Hospitality | 2017 |
| THE Strategic Observatory Limited | Professional & scientific | 2021 |
| THE Strive to Prosper Project Ltd | Health & social care | 2023 |
| THE Study Hive Ltd | Education | 2025 |
| THE Tank Shop Ltd | Wholesale & retail | 2021 |
| THE Tiny Tavern Liverpool Limited | Hospitality | 2021 |
| THE Tiny Tavern Ormskirk Limited | Hospitality | 2024 |
| THE Trusty DEV Ltd | Other services | 2026 |
| THE Typing Dog Ltd | Extraterritorial | 2022 |
| THE Union of Word Ltd | Administrative & support | 2023 |
| THE Valleruan Olive OIL Company Ltd | Manufacturing | 2024 |
| THE VLP Partnership LLP | | 2024 |
| THE Voyage Bespoke Luxury Travel Ltd | Hospitality | 2018 |
| THE Vurb Group Ltd | Wholesale & retail | 2022 |
| THE Way Asset Management Ltd | Financial services | 2025 |
| THE Wheelie Bean Ltd | Hospitality | 2025 |
| THE Whitley Wildlife Conservation Trust | Professional & scientific | 2011 |
| THE Wishlades Management Limited | Households | 2025 |
| THE Withanee Group Ltd | Information & communication | 2025 |
| THE Woodham Group Ltd | Real estate | 2017 |
| THE Woodland Warrior Programme CIC | Arts & recreation | 2019 |
| THE Worralls Ltd | Wholesale & retail | 2025 |
| Thea Tech Solutions Ltd | Information & communication | 2024 |
| Thebigbuild CIC | Administrative & support | 2025 |
| Thecomeup Ltd | Wholesale & retail | 2025 |
| Theesee Ltd | Extraterritorial | 2024 |
| Thefatco Limited | Information & communication | 2025 |
| Thekeep Ltd | Information & communication | 2025 |
| Thelettingspv Ltd | Real estate | 2024 |
| Thelibr.Ai Ltd | Information & communication | 2021 |
| Thema(Pvt) Ltd | Wholesale & retail | 2026 |
| Themyhgroup Ltd | Financial services | 2026 |
| Theona Ltd | Wholesale & retail | 2025 |
| Thepawprint Ltd | Other services | 2024 |
| Thepinkrosephotography Ltd | Professional & scientific | 2023 |
| Thepokevault Ltd | Wholesale & retail | 2025 |
| Therapy Paws UK Ltd | Other services | 2026 |
| Thermal Tavern Management Limited | Construction | 2019 |
| Thermtek Water Solutions Ltd | Manufacturing | 2021 |
| Thesuiteescape Ltd | Hospitality | 2024 |
| Thesupplementstop Ltd | Wholesale & retail | 2019 |
| Thetradingco Ltd | Information & communication | 2025 |
| Thevillagegroup CIC | Education | 2021 |
| Thingktree UK Ltd | Arts & recreation | 2025 |
| Thinkfusion Ltd | Wholesale & retail | 2025 |
| Thinkstride Ltd | Wholesale & retail | 2025 |
| Thips Thai Street Food Ltd. | Hospitality | 2025 |
| Thiqah Trading Ltd | Wholesale & retail | 2026 |
| Thirteen Hats Limited | Professional & scientific | 2024 |
| Thirty Nine Property Investment Ltd | Real estate | 2019 |
| Thistle & Freight Logistics Ltd | Transport & logistics | 2025 |
| THN Store Ltd | Wholesale & retail | 2024 |
| Thomas and Paul Properties Ltd | Real estate | 2025 |
| Thompson Collective Ltd | Wholesale & retail | 2024 |
| Thompson Sales 1ST Ltd | Wholesale & retail | 2026 |
| Thorne Software Ltd | Information & communication | 2025 |
| Thornex Trade Limited | Wholesale & retail | 2026 |
| Thorns Workforce Ltd | Administrative & support | 2007 |
| Thornton Works Ltd | Professional & scientific | 2026 |
| Thou Travel Consulting Ltd | Administrative & support | 2025 |
| Threaded Pets Limited | Wholesale & retail | 2026 |
| Threads of Kelso Limited | Wholesale & retail | 2023 |
| Three Counties Garden Rooms Ltd | Construction | 2026 |
| Three Storeys Ltd | Information & communication | 2026 |
| Three Suns Fragrances Ltd | Wholesale & retail | 2025 |
| Thrift Umbrella Ltd | Wholesale & retail | 2025 |
| Thrive Bookkeeping Ltd | Professional & scientific | 2021 |
| Thrive Send Support CIC | Education | 2025 |
| Thrivestone Capital Ltd | Real estate | 2024 |
| Thrivingc Ltd | Wholesale & retail | 2025 |
| Throttle Vision Ltd | Wholesale & retail | 2026 |
| THT SC Ltd | Wholesale & retail | 2025 |
| Thunder Wave Studio Ltd | Wholesale & retail | 2026 |
| Thundergen Ltd | Energy | 2024 |
| Thundersley Motor Company Ltd | Wholesale & retail | 2026 |
| Thyferran Limited | Health & social care | 2025 |
| Ti-It Limited | Information & communication | 2022 |
| Tiago Reis Software Solutions Ltd | Information & communication | 2018 |
| Tianchang Technology Co., Ltd | Extraterritorial | 2022 |
| Tianhao Technology Co. , Ltd | Manufacturing | 2024 |
| Tianjin Hyphen Alloy Material Co., Ltd | Wholesale & retail | 2025 |
| Tianjin Ningyue Technology Co., Ltd. | Wholesale & retail | 2025 |
| Tianyu Core Trading Limited | Wholesale & retail | 2026 |
| Tianyu E-Commerce Co., Ltd | Wholesale & retail | 2025 |
| Tianyue International Transportation Agency Limited | Extraterritorial | 2012 |
| Tibberton Publishing Services Limited | Information & communication | 2009 |
| Ticketbix Ltd | Wholesale & retail | 2026 |
| Ticketyboo & Paint Limited | Wholesale & retail | 2015 |
| Tideads Ltd | Information & communication | 2025 |
| Tidecrest Construction Management Ltd | Construction | 2026 |
| Tidello Ltd | Wholesale & retail | 2025 |
| Tiderhino Ltd | Information & communication | 2025 |
| Tiera Biotech Co Ltd | Administrative & support | 2026 |
| Tifix Ltd | Wholesale & retail | 2025 |
| Tiger Bridge International Ltd | Administrative & support | 2026 |