| Techniseal Limited | Extraterritorial | 1988 |
| TEE Tree Group Limited | Professional & scientific | 2013 |
| Telford Mews Management Co (NO 1) Ltd | Households | 2003 |
| Templeton Court Management Company (Oxford) Limited | Households | 2006 |
| Tenuretotal Property Management Limited | Households | 1995 |
| Teres Limited | Administrative & support | 2008 |
| Terrace Hill Guildford Management Limited | Households | 2004 |
| Thames Valley Surgical Services Limited | Health & social care | 2010 |
| Thames Valley Vasectomy Services Ltd | Health & social care | 2009 |
| Thamesdale Management Limited | Households | 2013 |
| Thatcham Investment Holdings Ltd | Real estate | 2019 |
| THE Alchemy Labs Group Ltd | Professional & scientific | 2021 |
| THE Arbour (Isleworth) Management Company Limited | Households | 2007 |
| THE Avenue (Finchley) Management Company Limited | Households | 2013 |
| THE Bellerby Apartments Management Company Limited | Households | 2015 |
| THE Boardwalk Management (Sovereign Harbour) Limited | Extraterritorial | 2004 |
| THE Boyne Care Home Limited | Health & social care | 2013 |
| THE Building Equipment Group Ltd | Financial services | 2019 |
| THE Challacombe Management Company Limited | Households | 2005 |
| THE Citrus Building Management Company Limited | Administrative & support | 2013 |
| THE Clifford Road Management Company Limited | Households | 1990 |
| THE Clockhouse (Oxshott) Limited | Real estate | 1999 |
| THE Consultancy Bureau Limited | Professional & scientific | 2019 |
| THE Courtyard Property (Basildon) Limited | Households | 2005 |
| THE Edge Woolley Management Company Limited | Households | 2007 |
| THE Foundry Carver Street Management Company Limited | Households | 2015 |
| THE Gateway Marine Parade (Dover) Limited | Extraterritorial | 2004 |
| THE Grange (Farnham Royal) Management Company Limited | Households | 2007 |
| THE Gundog Club Limited | Other services | 2006 |
| THE Gundog Trust | Other services | 2011 |
| THE Gym Joint Ltd | Arts & recreation | 2013 |
| THE Harringtons Management Company (Exeter) Limited | Extraterritorial | 2013 |
| THE Huli Huli Sauce Co Limited | Wholesale & retail | 2026 |
| THE Joyner Journal Limited | Administrative & support | 2017 |
| THE Land Buying Company (UK) Ltd | Real estate | 2015 |
| THE Larger Book Company Limited | Arts & recreation | 2012 |
| THE Leading Edge Residents Association Limited | Real estate | 2001 |
| THE Mythological Theatre Ltd | Arts & recreation | 2022 |
| THE Nurseries Management Company (Bishopston) Limited | Real estate | 2014 |
| THE Nursery & School Furniture Company Ltd | Wholesale & retail | 2026 |
| THE Nursery and School Renovation Company Ltd | Construction | 2024 |
| THE Nursery Property Company Ltd | Health & social care | 2024 |
| THE Old School Car Park Management Limited | Households | 2017 |
| THE Old Sorting Rooms Management Company Limited | Households | 2006 |
| THE Payments Practice Limited | Professional & scientific | 2021 |
| THE Piazza East RTM Company Limited | Extraterritorial | 2006 |
| THE Piazza West RTM Company Limited | Extraterritorial | 2006 |
| THE Quarterdeck (Deal) Management Company Limited | Households | 2013 |
| THE Rose Leadership Company Limited | Professional & scientific | 2025 |
| THE School Renovation Company Ltd | Construction | 2013 |
| THE Sidings Management Company (Bourne END) Limited | Households | 2021 |
| THE Summit Bournemouth Management Company | Households | 2015 |
| THE Tone Temple Ltd | Wholesale & retail | 2026 |
| THE Village Association Limited | Households | 1999 |
| THE Vineries RTM Ltd | Households | 2004 |
| THE Wickets Property Management Limited | Households | 2004 |
| Thegcdgroup Ltd | Construction | 2017 |
| Thepeptidecode Ltd | Wholesale & retail | 2026 |
| Thermosense Ltd | Wholesale & retail | 2006 |
| Thorncliffe House Management Company Limited | Households | 2002 |
| Thornton Road (Bradford) Management Company Limited | Households | 2011 |
| Three Unities Ltd | Wholesale & retail | 2022 |
| Thuan Phat Limited | Other services | 2021 |
| Thymemarch Property Management Limited | Households | 2003 |
| TIM Mulcahy Ltd | Information & communication | 2023 |
| TIN PAN Films Ltd | Information & communication | 2005 |
| TIN PAN Productions Ltd | Other services | 2023 |
| Titanium Electrical Services Limited | Construction | 2020 |
| Tlclothing Solutions Ltd | Wholesale & retail | 2019 |
| Tokenised Ltd | Information & communication | 2025 |
| Tokenized Entertainment Ltd | Information & communication | 2024 |
| Toor Art Limited | Wholesale & retail | 2017 |
| Toucan Building Solutions Ltd | Construction | 2015 |
| Touchstone Property Solutions Limited | Real estate | 2018 |
| Tower Court (Witney) Management Company Limited | Households | 2002 |
| Tower Court Apartments (Witney) Management Limited | Households | 2004 |
| Tower Garage (Marlow) Limited | Wholesale & retail | 1993 |
| Tower Properties (Bath) Limited | Real estate | 2006 |
| Townsends Limited | Wholesale & retail | 2017 |
| Trade Window Systems Commercial Ltd | Construction | 2018 |
| Traders House Management Company Limited | Households | 2001 |
| Tradewinds Management Limited | Households | 2003 |
| Treadwells Mill Management Company Limited | Households | 2003 |
| Treasured Homes Limited | Hospitality | 2019 |
| Tremr Limited | Information & communication | 2015 |
| Trendcross Limited | Other services | 1991 |
| Tropical Research Services Limited | Information & communication | 2022 |
| True Engineers Limited | Administrative & support | 2019 |
| Truscott Management Limited | Households | 2013 |
| Trusted Voice Europe Limited | Professional & scientific | 2021 |
| Trusty Homes Limited | Real estate | 2019 |
| Trystworthy Residents Association Limited | Households | 1995 |
| Tudor Court (Stoke Poges) Management Company Limited | Households | 2017 |
| Tuffley Management Limited | Households | 2007 |
| Tuns Hill Limited | Households | 1981 |
| Tuscan Retreats Limited | Real estate | 2005 |
| Twenty One Twelve Marketing Ltd | Information & communication | 2016 |
| Two Bees Limited | Construction | 2010 |
| Two Dogs Enterprises Ltd | Professional & scientific | 2012 |
| Two Thames Avenue Management Company Limited | Households | 2015 |