| THE Ribbons Network Limited | Administrative & support | 2020 |
| THE Right Word Limited | Professional & scientific | 2017 |
| THE Serco Foundation | Professional & scientific | 2012 |
| THE Skylarks (Warfield) Management Company Ltd | Households | 2023 |
| THE SLT Practice Limited | Extraterritorial | 2016 |
| THE Sweet Shop, Odiham Limited | Wholesale & retail | 2024 |
| THE T&H Property Group Ltd | Financial services | 2026 |
| THE Third Object Limited | Professional & scientific | 2017 |
| THE Traders Yard Ltd | Wholesale & retail | 2026 |
| THE Underdog Agency LLP | | 2009 |
| THE Vicarage Partnership Limited | Professional & scientific | 2020 |
| THE White Oaks Consultancy Limited | Other services | 1989 |
| THE Wilson Wiley FOX Co Limited | Financial services | 2026 |
| Thinking Violets Film & Television Limited | Information & communication | 2013 |
| Thinkviz Limited | Information & communication | 2017 |
| Thinkwise Ventures Limited | Real estate | 2021 |
| Third Space Properties Ltd | Real estate | 2019 |
| Thompsons Cars Limited | Wholesale & retail | 2013 |
| Thorium Capital Limited | Professional & scientific | 2026 |
| Three-L Building Services Limited | Construction | 2018 |
| Threshold Consultants Limited | Administrative & support | 2010 |
| Thursday Ideas Ltd | Real estate | 2009 |
| Thursday Ideas WTE2 Ltd | Financial services | 2012 |
| THW Refrigeration Ltd | Hospitality | 2015 |
| Tidal Range Tunnels Limited | Energy | 2018 |
| Tiger FOX Limited | Manufacturing | 2021 |
| TIM Purslow Limited | Wholesale & retail | 2013 |
| Timecheck Consulting Ltd | Professional & scientific | 2012 |
| TINKS4X4 Ltd | Wholesale & retail | 2023 |
| Titanic Network Limited | Professional & scientific | 1998 |
| TJA CAP Ltd | Financial services | 2022 |
| TMB Building Contractors Ltd. | Construction | 2015 |
| TMS (Wokingham) Limited | Administrative & support | 2008 |
| TOM Butler Artist Limited | Arts & recreation | 2018 |
| TOM Sherlock Consulting Limited | Professional & scientific | 2018 |
| Tony Balch & Co Hospitality Consultants Limited | Professional & scientific | 2018 |
| Topsoil UK Odiham Ltd | Administrative & support | 2008 |
| Total Asset Recovery Limited | Professional & scientific | 2009 |
| Touchstone Systems Europe Ltd. | Administrative & support | 2009 |
| Town Furlong Cattery Ltd | Other services | 2011 |
| Toy Storage Limited | Transport & logistics | 2015 |
| Toycardzone Ltd | Wholesale & retail | 2025 |
| Track Global Limited | Wholesale & retail | 2019 |
| Traddo Limited | Wholesale & retail | 2020 |
| Tradeouts Limited | Professional & scientific | 1999 |
| Trailz Bikes Ltd | Wholesale & retail | 2024 |
| Transformation HR Ltd | Professional & scientific | 2025 |
| Transforming Squares (UK) Limited | Real estate | 2025 |
| Transforming Squares Rental Limited | Real estate | 2025 |
| Trapped in Time Ltd | Arts & recreation | 2026 |
| Trash & Grabz Ltd | Water & waste | 2026 |
| Treescape Arborists Ltd | Administrative & support | 2015 |
| Trelissick Court Limited | Real estate | 2000 |
| Trendzsetting Ltd | Wholesale & retail | 2025 |
| Trevillian Devine Ltd | Financial services | 2019 |
| Tribourne Multisport Events Limited | Arts & recreation | 2018 |
| Trimacre LLP | | 2019 |
| Trimmers Livery Limited | Agriculture & fishing | 2016 |
| Trinovantes Capital Limited | Financial services | 2022 |
| Triple FFF Brewery Limited | Manufacturing | 2021 |
| Triple Threat Theatre | Arts & recreation | 2021 |
| Trisel Building Limited | Construction | 2007 |
| Trizon Properties Limited | Real estate | 2017 |
| Tru-Lawn Limited | Administrative & support | 2008 |
| True Form Composites Limited | Professional & scientific | 2024 |
| TTL Electronics Limited | Other services | 2004 |
| Ttrt Holdings Limited | Financial services | 2020 |
| Tuddl Limited | Health & social care | 2020 |
| Tulipe Limited | Information & communication | 2012 |
| Turnpike Field Limited | Financial services | 2020 |
| Twenty Fifteen Property Maintenance Ltd | Other services | 2015 |
| TWENTY7SEVEN Trading Ltd | Administrative & support | 2010 |
| Twin Crecent Developments Ltd | Real estate | 2025 |
| Twissell Neilson Budd & Co. Ltd | Professional & scientific | 2009 |
| Two Crazy Dog Ladies Ltd | Agriculture & fishing | 2024 |
| UKN On-Line Limited | Information & communication | 2000 |
| Unboxed Insights Ltd | Information & communication | 2025 |
| Uncia Consultancy (HW) Ltd. | Information & communication | 2015 |
| Uninterruptible Power Supplies Limited | Professional & scientific | 2005 |
| Unique Financial Holdings Limited | Professional & scientific | 2021 |
| Universe Automation Ltd | Manufacturing | 2010 |
| Unlikely Icons Ltd | Wholesale & retail | 2022 |
| Unrivalled Coachtrimming Ltd | Wholesale & retail | 2021 |
| Upper Sheldon House Ltd | Administrative & support | 2026 |
| Upsher Heating Ltd | Construction | 2016 |
| Uridteq Limited | Information & communication | 2023 |
| V.A.P. Car Sales Limited | Wholesale & retail | 2020 |
| Valentine Technologies Limited | Agriculture & fishing | 1987 |
| Valentino's Salumeria Ltd | Hospitality | 2024 |
| Valo Astris Ltd | Information & communication | 2025 |
| Valory Design Studio Ltd | Construction | 2026 |
| Vastum Terram Limited | Real estate | 2021 |
| Velora Technology Ltd | Information & communication | 2026 |
| Velovixen Ltd | Wholesale & retail | 2023 |
| Venetian Master Perfumer Ltd | Wholesale & retail | 2014 |
| Venta Global Holdings Ltd | Financial services | 2023 |
| Venta Global Ltd | Manufacturing | 2013 |
| Veracity Partners Ltd | Information & communication | 2023 |
| Vericore Limited | Manufacturing | 1998 |
| Verified Threat Ltd | Information & communication | 2026 |