| TB Windows Limited | Construction | 2002 |
| TBB Garden Services Ltd | Administrative & support | 2026 |
| TBG 123 Limited | Wholesale & retail | 2016 |
| TBG Locums Ltd | Health & social care | 2023 |
| TC Building & Refurbishment Ltd | Construction | 2015 |
| Tcas Holdings Limited | Financial services | 2025 |
| Tcas Properties Ltd | Real estate | 2022 |
| TCB Stoke Limited | Hospitality | 2018 |
| TCE Lettings Limited | Real estate | 2026 |
| TCK Peterborough Devco LLP | | 2016 |
| TCK Peterborough Holdco 1 LLP | | 2016 |
| TCK Peterborough Holdco 2 LLP | | 2016 |
| Tcmb Ltd | Professional & scientific | 2018 |
| TCT Electrical Ltd | Construction | 2024 |
| TD Removals & Couriers Ltd | Transport & logistics | 2022 |
| TD Waters Limited | Construction | 2022 |
| Tdac Holdings Limited | Real estate | 2023 |
| TDC Property Limited | Real estate | 2025 |
| TDD Plumbing and Heating Ltd | Construction | 2023 |
| TDF Junior Wellbeing Community Interest Company | Health & social care | 2025 |
| TDF the LAB Ltd | Arts & recreation | 2020 |
| TDK Properties Ltd | Real estate | 2017 |
| Teachers to YOU Ltd | Education | 2022 |
| Team PAK Consulting Ltd | Professional & scientific | 2019 |
| Team Stone Ltd | Wholesale & retail | 2019 |
| Team-Iq Group Ltd | Professional & scientific | 2000 |
| Teams.Gg Ltd | Information & communication | 2019 |
| TEC AV Ltd | Arts & recreation | 2018 |
| TEC Solutions Ltd | Administrative & support | 2023 |
| Tech Nest Solutions Limited | Information & communication | 2025 |
| Tech Xchange Limited | Wholesale & retail | 2018 |
| Tech-Cessible Ltd | Information & communication | 2025 |
| Tech-Style Building & Maintenance Ltd | Construction | 2025 |
| TECH4BUSINESS Ltd | Information & communication | 2015 |
| TECH4LIFE Global Ltd | Wholesale & retail | 2019 |
| Techdij Limited | Information & communication | 2019 |
| Technolink (U.K.) Limited | Professional & scientific | 1983 |
| Techsmart Services Limited | Administrative & support | 2019 |
| Techtradeuk Limited | Information & communication | 2017 |
| Techtransform SAP Solutions Limited | Information & communication | 2023 |
| Techwizard Group Ltd | Extraterritorial | 2026 |
| Techwizard IT Services Ltd | Information & communication | 2018 |
| Tecmaco International Limited | Manufacturing | 2015 |
| Teddy Structures Ltd | Manufacturing | 2022 |
| Teddytech Ltd | Information & communication | 2015 |
| TEE Enterprise Limited | Wholesale & retail | 2025 |
| TEE Morris Shells Ltd | Wholesale & retail | 2024 |
| Teej Properties Ltd | Real estate | 2022 |
| Teeluxe Limited | Information & communication | 2016 |
| Teem Services Limited | Administrative & support | 2008 |
| Teeth & Face Ltd | Health & social care | 2020 |
| Tegrel Limited | Professional & scientific | 2002 |
| TEI Weddings Ltd | Hospitality | 2026 |
| Teignmouth Securities Limited | Real estate | 2015 |
| Tejasv Dent Ltd | Health & social care | 2016 |
| Tejasv Developers Ltd | Real estate | 2019 |
| TEL Group Ltd | Information & communication | 2005 |
| Tela Technology Group Limited | Information & communication | 2012 |
| Tela Technology Limited | Information & communication | 2012 |
| Telcoinabox Group Ltd | Construction | 2006 |
| Telecentric Ltd | Information & communication | 2001 |
| Telegency Ltd | Real estate | 2025 |
| Telford Compressed Air Services Limited | Other services | 1993 |
| Telford Galvanizers Limited | Professional & scientific | 1926 |
| Tellme Analytics Limited | Information & communication | 2022 |
| Tellumo Limited | Professional & scientific | 2026 |
| Telstar Digital Ltd | Information & communication | 2025 |
| Teme Products Limited | Manufacturing | 2004 |
| Temigold Treats Ltd | Manufacturing | 2025 |
| Temple Byte Ltd | Information & communication | 2018 |
| Temple Road Dorridge Management Company Limited | Real estate | 2010 |
| Tempsford Cedars Limited | Households | 2008 |
| Temptech Cooling Ltd | Construction | 2023 |
| TEN Acre Mews (RTM) Company Ltd | Households | 2014 |
| TEN Thousand Talents Ltd | Administrative & support | 2025 |
| Tend Facilities Management Limited | Professional & scientific | 2025 |
| Tender Years Day Nursery Ltd | Health & social care | 2002 |
| Teng DA Ltd | Hospitality | 2026 |
| Terngate Limited | Mining & quarrying | 2008 |
| Terra (Drakes Broughton) Limited | Construction | 2023 |
| Terra (Gaydon) Limited | Real estate | 2025 |
| Terra (Hanslope) Limited | Real estate | 2025 |
| Terra (Honeybourne) Limited | Construction | 2023 |
| Terra (Hopwas) Limited | Real estate | 2025 |
| Terra (Longbridge) Limited | Real estate | 2025 |
| Terra (NW Chelt) Limited | Real estate | 2025 |
| Terra (Offenham) Limited | Real estate | 2026 |
| Terra (Stoke Prior) 2 Limited | Real estate | 2026 |
| Terra (Stoke Prior) Limited | Construction | 2023 |
| Terra (Willingham) Limited | Construction | 2023 |
| Terra (Winterbourne) Limited | Real estate | 2025 |
| Terra Assets Limited | Financial services | 2025 |
| Terra Strategic (Chiltern) Limited | Administrative & support | 2015 |
| Terra Strategic (Midlands) Limited | Administrative & support | 2015 |
| Terra Strategic Limited | Real estate | 2015 |
| Terrace Couture Limited | Administrative & support | 2013 |
| Terrapraxis CIC | Professional & scientific | 2020 |
| Terricom Limited | Wholesale & retail | 1994 |
| TES Controls Limited | Construction | 2009 |
| TES Housing Solutions Limited | Households | 2026 |