| Tarrant Property Development Limited | Real estate | 2015 |
| Tasty Malabar Ltd | Manufacturing | 2026 |
| Tatemwa Limited | Health & social care | 2013 |
| Tattoo Extravaganza Ltd | Other services | 2018 |
| TAU Consulting Limited | Professional & scientific | 2005 |
| TAU Property Management Limited | Real estate | 2014 |
| Taylored Cuisine Ltd | Hospitality | 2025 |
| Taylored Property Enhancement Ltd | Construction | 2024 |
| TB Rigging and Automation Ltd | Construction | 2025 |
| TD Care Services Ltd | Health & social care | 2026 |
| Tdcare Solutions Ltd | Health & social care | 2019 |
| Tectonics Business Design and Management Limited | Construction | 1991 |
| Tectonics Contracting Limited | Construction | 2007 |
| Tegerdine Associates Limited | Professional & scientific | 2017 |
| Tekworks Design & Manufacturing Ltd | Manufacturing | 2010 |
| Telco-Net Consulting Limited | Professional & scientific | 2012 |
| Telfair Construction Ltd | Construction | 2021 |
| Temple Road Residents Management Company Limited | Households | 2022 |
| Tengri Systems Ltd | Information & communication | 2026 |
| Tennisbull Ltd | Education | 2021 |
| Terra Guitars Ltd | Manufacturing | 2024 |
| Terra Nova Limited | Administrative & support | 2023 |
| Tersol Limited | Real estate | 2016 |
| THE Arches (Bordon) Freehold Company Limited | Real estate | 2013 |
| THE Bay of Small Islands Company Limited | Hospitality | 2016 |
| THE Big Biscuit Company Limited | Manufacturing | 2016 |
| THE Cleansing Room Limited | Health & social care | 2025 |
| THE Climate Guys Ltd | Construction | 2025 |
| THE Common Sense Approach Limited | Information & communication | 2016 |
| THE Conifers (Phase 2) Residents Association Limited | Households | 1992 |
| THE Crafty Glass Box Limited | Wholesale & retail | 2015 |
| THE Crown (Arford) Limited | Hospitality | 2024 |
| THE Cutting Edge Consultancy Ltd | Professional & scientific | 2019 |
| THE Dairy Coffee Shop Limited | Hospitality | 2024 |
| THE Finance Manager Limited | Professional & scientific | 2010 |
| THE Finesse Automotive Co Ltd | Wholesale & retail | 2016 |
| THE Green Plant Group Limited | Construction | 2017 |
| THE Hampshire Shepherd Ltd | Wholesale & retail | 2022 |
| THE Home Solutions Group Limited | Construction | 2018 |
| THE Jade Group Limited | Wholesale & retail | 1998 |
| THE Lone Spartan Ltd | Manufacturing | 2024 |
| THE Luxury Cleaning Company Ltd | Administrative & support | 2025 |
| THE Moseley Group Limited | Construction | 2017 |
| THE Natural Cook Company Ltd | Education | 2019 |
| THE Next Big Ltd | Wholesale & retail | 2019 |
| THE Old School Club Ltd | Information & communication | 2011 |
| THE Pavilion at Bosc Ltd | Hospitality | 2021 |
| THE Planet Co Group Ltd | Other services | 2026 |
| THE Security Consultancy Limited | Other services | 2017 |
| THE Sporting Chance Clinic | Administrative & support | 2001 |
| THE Strive Collective Limited | Other services | 2025 |
| THE Wellness Chamber Ltd | Other services | 2025 |
| THE Whitening Clinic Ltd | Health & social care | 2025 |
| THE Working Tree Limited | Real estate | 2024 |
| Thebulb Ltd | Information & communication | 2013 |
| Three One Energy Ltd | Construction | 2024 |
| Thrust Boats Limited | Arts & recreation | 2020 |
| Thurmac Limited | Real estate | 1957 |
| Tiger MAN Homes Limited | Real estate | 2024 |
| Tignals Partnership Ltd | Professional & scientific | 2021 |
| Tilford Garage Limited | Wholesale & retail | 2019 |
| Tiny Tums Catering Ltd | Hospitality | 2024 |
| Titan HR Ltd | Professional & scientific | 2019 |
| TJ Creative Marketing Limited | Professional & scientific | 2021 |
| TJB Coaching Ltd | Education | 2025 |
| TOM Rasburn SFX Limited | Information & communication | 2019 |
| Tomsar Transport Ltd | Transport & logistics | 2025 |
| Top Branch Limited | Professional & scientific | 2012 |
| Topeurocar Ltd | Wholesale & retail | 2011 |
| Topfloor Contracts Limited | Wholesale & retail | 2003 |
| Total Profiles Holdings Ltd | Manufacturing | 2019 |
| Total SEO & Marketing Ltd | Information & communication | 2010 |
| Tradersvault Ltd | Education | 2025 |
| Traids Software Ltd | Information & communication | 2026 |
| Training of Interest Limited | Professional & scientific | 2013 |
| Tranquil Landscapes Ltd | Administrative & support | 2021 |
| Treatly Events Limited | Hospitality | 2025 |
| Tree Family Investments (Two) Ltd | Real estate | 2022 |
| Tree Family Investments Ltd | Real estate | 2020 |
| Tree Tops Clubs Limited | Health & social care | 2018 |
| Treeworker Equipment Ltd | Agriculture & fishing | 2025 |
| TRI Signs Ltd | Manufacturing | 2022 |
| Triple Marc Limited | Real estate | 2019 |
| TRL Taxis UK Ltd | Transport & logistics | 2021 |
| Trouvaille Holdings Ltd | Other services | 2019 |
| Truecarstory Ltd | Information & communication | 2026 |
| Trunest Properties Ltd | Real estate | 2025 |
| Trust-A-Forwarder Ltd | Administrative & support | 2023 |
| Trustoryx Accounting and Bookkeeping Limited | Professional & scientific | 2021 |
| Turner Partners LLP | | 2022 |
| Tvest Limited | Financial services | 2022 |
| TWENTY10 Developments Limited | Information & communication | 2026 |
| Two Horse Leasing Ltd | Arts & recreation | 2014 |
| UI Loco Ltd | Information & communication | 2018 |
| UK Childcare Group Ltd | Education | 2020 |
| UK Marine Solutions Ltd | Transport & logistics | 2024 |
| Uk-China Connect Limited | Professional & scientific | 2011 |
| Ukspace Trade Association Ltd | Other services | 2020 |
| Umtr Group Ltd | Wholesale & retail | 2016 |
| Universal Remedy Healthcare Ltd | Public administration | 2025 |