| Sydenham Neighbourhood Initiatives Limited | Other services | 1998 |
| Sydmar Lodge Limited | Health & social care | 2016 |
| Symonds & Newey Management Limited | Construction | 2017 |
| Synaworx Studios Ltd | Arts & recreation | 2025 |
| Synchronize One Limited | Information & communication | 2025 |
| Syndicate Records Ltd | Information & communication | 2025 |
| T & a Cars Limited | Transport & logistics | 2008 |
| T & Co International Limited | Professional & scientific | 2013 |
| T & H Motor Services Ltd | Wholesale & retail | 2014 |
| T G Commodities Limited | Wholesale & retail | 1998 |
| T T Property Limited | Real estate | 2012 |
| T&H Inspire Limited | Real estate | 2025 |
| T&M Accounting Services Limited | Professional & scientific | 2007 |
| T&V Developments Ltd | Real estate | 2022 |
| T(N)S Catering Management Limited | Hospitality | 2003 |
| T.C.B. Holdings Limited | Professional & scientific | 2003 |
| T.S.R Landscapes Ltd | Administrative & support | 2026 |
| T1 Cars Limited | Manufacturing | 2015 |
| T1300 Management Company Limited | Real estate | 2018 |
| T2C Projects Limited | Other services | 2016 |
| T3A Solutions Ltd | Information & communication | 2008 |
| T4M Properties Limited | Real estate | 2024 |
| TAB Medical Limited | Health & social care | 2013 |
| Tabalot Ltd | Information & communication | 2023 |
| Table Art Limited | Other services | 2011 |
| Taboo Trading Ltd | Information & communication | 2022 |
| Tabtracker Ltd | Information & communication | 2024 |
| Tachbrook Design Holdings Limited | Financial services | 2023 |
| Tachbrook Design Limited | Construction | 2001 |
| TAE Kwon-Do International Limited | Arts & recreation | 1993 |
| Take ME to Africa Ltd | Administrative & support | 2017 |
| Tamara Glass Limited | Construction | 1976 |
| Tandy Photographics Ltd | Other services | 2009 |
| Tangerine Phoenix Ltd | Education | 2024 |
| Tango Bravo Alpha Limited | Information & communication | 2014 |
| Tansiqar Ltd | Information & communication | 2025 |
| Tansor (Halesowen) Limited | Real estate | 2001 |
| Tansor Investment Properties Limited | Real estate | 2007 |
| Tansor Real Estate Company Limited | Real estate | 2014 |
| Tansor Ziran Projects Limited | Construction | 2017 |
| Taochirho Limited | Professional & scientific | 2013 |
| Tara & Co Accounting Services Ltd | Professional & scientific | 2011 |
| Tara & Co Property Limited | Real estate | 2003 |
| Target Geomatics Limited | Professional & scientific | 2025 |
| Tari Technology Services Limited | Construction | 2011 |
| Tarsho Housing Limited | Construction | 2024 |
| Task Surveying Ltd | Real estate | 2021 |
| Task Surveyinguk Ltd | Professional & scientific | 2025 |
| Tatu Couture Limited | Wholesale & retail | 2016 |
| Tawyl Ltd | Wholesale & retail | 2025 |
| Taxwise Associates Limited | Professional & scientific | 2024 |
| Taylor Family Holdings Ltd | Financial services | 2022 |
| Taylor Steed Consulting Limited | Professional & scientific | 2020 |
| Taylor White (OFP) Limited | Professional & scientific | 2024 |
| Taylor-Pressform Limited | Manufacturing | 1985 |
| Tayton Driver Training Ltd | Education | 2024 |
| TBF Leamington Limited | Professional & scientific | 2023 |
| TBP Productions Limited | Information & communication | 2023 |
| TBY Limited | Wholesale & retail | 2015 |
| Tbynp Limited | Wholesale & retail | 2022 |
| TC Ollis Limited | Professional & scientific | 2022 |
| TCB Development Properties Ltd | Real estate | 2023 |
| TCF 1 GP Limited | Financial services | 2020 |
| TCF I LP | | 2020 |
| TCF SPV II LP | | 2021 |
| Tdmv Ltd | Information & communication | 2024 |
| TDT Properties Ltd | Administrative & support | 2014 |
| Team Calabazas Ltd | Professional & scientific | 2022 |
| Team FLP Ltd | Education | 2013 |
| Team Lifestyle Group Limited | Health & social care | 2023 |
| Team Square PEG CIC | Professional & scientific | 2020 |
| Teauco Soft Ltd | Information & communication | 2023 |
| TEC Transnational Limited | Professional & scientific | 1995 |
| Tech 100 Ltd | Wholesale & retail | 2007 |
| Techcellence Consulting Limited | Information & communication | 2016 |
| Techmates IT Services Limited | Professional & scientific | 2013 |
| Technical Logistics Limited | Professional & scientific | 2011 |
| Technoir Consultancy Limited | Manufacturing | 2024 |
| Technology Search International Limited | Financial services | 2019 |
| Technology SOLUTIONS2 Limited | Information & communication | 2017 |
| Techwaves Talent Partners Limited | Professional & scientific | 2025 |
| Tecman Advanced Healthcare Products Limited | Manufacturing | 2020 |
| Tecman Holdings Ltd | Financial services | 2020 |
| Tecman Speciality Materials Ltd | Manufacturing | 2014 |
| TEE Publishing Ltd | Information & communication | 2001 |
| Teesbourne Properties Limited | Real estate | 2012 |
| Tekka Finance Ltd | Administrative & support | 2026 |
| Tekscape Limited | Information & communication | 2024 |
| Temperance Cafe Ltd | Hospitality | 2026 |
| Temperance Live CIC | Arts & recreation | 2026 |
| Templar Consulting Ltd | Construction | 2026 |
| Tender Space Ltd | Construction | 2025 |
| Tentpeg Global Limited | Professional & scientific | 2013 |
| TEP Renewables (Solar PV Developments) Ltd | Construction | 2020 |
| Tera Holding Limited | Financial services | 2022 |
| Terabuilding Ltd | Construction | 2022 |
| Teraengineering Limited | Professional & scientific | 2022 |
| Terioatestates Ltd | Real estate | 2024 |
| Terry Saunders Limited | Construction | 2012 |
| Tessiant Limited | Professional & scientific | 2019 |