| TEK Service Improvement Limited | Other services | 2021 |
| Telco Estates Limited | Construction | 1990 |
| Telecom Hub Ltd | Information & communication | 2017 |
| Telediagnostic Solutions Limited | Health & social care | 2024 |
| Teltscher Enterprises Limited | Administrative & support | 2001 |
| Teltscher Industrial Limited | Real estate | 2001 |
| Temp Blinds Ltd | Wholesale & retail | 2025 |
| Temporal Investment Limited | Professional & scientific | 1994 |
| TEN7 Health Systems Limited | Health & social care | 2012 |
| Tender Tots Childcare Ltd | Health & social care | 2017 |
| Tenergy Properties Ltd | Real estate | 2023 |
| Tenis Solutions Limited | Information & communication | 2022 |
| Tennis Court Surface Solutions Ltd | Construction | 2013 |
| Tents and Towels Limited | Wholesale & retail | 2017 |
| Tequila Consulting Ltd | Professional & scientific | 2007 |
| Terra Firma Pipeline Limited | Administrative & support | 2000 |
| Terra Thema Limited | Arts & recreation | 2015 |
| Terry Haynes International Ltd | Financial services | 2024 |
| Tetra Resource Ltd | Administrative & support | 2013 |
| Teutit Limited | Information & communication | 2015 |
| TFC Consulting Limited | Administrative & support | 2017 |
| TG Group Limited | Real estate | 2019 |
| Tgdax Ltd | Professional & scientific | 2023 |
| TGJ Developments Ltd | Real estate | 2017 |
| TGJ Rentals Ltd | Real estate | 2021 |
| TGJ Transport and Hire Ltd | Transport & logistics | 2020 |
| Thackerys Cockapoos Limited | Wholesale & retail | 2022 |
| Thackerys Limited | Wholesale & retail | 2020 |
| Thambu's Corporation Ltd | Administrative & support | 2017 |
| Thambu's Properties Ltd | Real estate | 2022 |
| Thameside Moorings Ltd | Transport & logistics | 2022 |
| That Feeling Studios Ltd | Information & communication | 2021 |
| Thatchergray Property Solutions Ltd | Real estate | 2024 |
| Thatchers Arms Limited | Hospitality | 2010 |
| Thaw Properties Limited | Real estate | 2025 |
| THE Acmu Group C.I.C. | Manufacturing | 2025 |
| THE Agile Rabbit Limited | Hospitality | 2011 |
| THE Alchemy Space Limited | Other services | 2020 |
| THE Anchorage (Solva) Management Company Limited | Households | 2002 |
| THE Assembly Media Group Limited | Information & communication | 2025 |
| THE Asset Exchange Ltd | Wholesale & retail | 2013 |
| THE Balham Hub Management Company Limited | Real estate | 2001 |
| THE Barnyard Café Limited | Hospitality | 2016 |
| THE Bathroom Fitting Company Limited | Construction | 2014 |
| THE Beatmakers Limited | Arts & recreation | 2010 |
| THE Beauty Bars Essex Ltd | Other services | 2022 |
| THE Beauty Chambers London Ltd | Other services | 2021 |
| THE Beauty of Heaven Limited | Other services | 2017 |
| THE BEE BIZ Honey Ltd | Wholesale & retail | 2025 |
| THE Beehive PH Limited | Real estate | 2019 |
| THE Blue Crown (Brentwood) Ltd | Hospitality | 2019 |
| THE Body Joint Ltd | Education | 2017 |
| THE Bodyshop (Barkingside) Limited | Wholesale & retail | 2021 |
| THE Botanical Standard Limited | Health & social care | 2026 |
| THE Brave Nelson Limited | Hospitality | 2023 |
| THE Brentwood Coffee Club Ltd | Manufacturing | 2024 |
| THE Brentwood Window Cleaner Ltd | Administrative & support | 2024 |
| THE Broking Academy Ltd | Education | 2018 |
| THE Burrows (Paddock Wood) Management Limited | Households | 2022 |
| THE Burwood Group Ltd | Financial services | 2026 |
| THE Clinic Club Ltd | Other services | 2025 |
| THE Company Centre Limited | Administrative & support | 2000 |
| THE Cooksmill Food Company Limited | Administrative & support | 1999 |
| THE Cornwall Candle Company Ltd | Extraterritorial | 2023 |
| THE Cotton Textile Company Limited | Manufacturing | 2013 |
| THE CUT Productions Ltd | Arts & recreation | 2011 |
| THE Daily Bubble Tea & Juice Limited | Manufacturing | 2022 |
| THE Daily Slice Limited | Hospitality | 2025 |
| THE Decorations Box Ltd | Manufacturing | 2010 |
| THE Denim Club Ltd | Other services | 2014 |
| THE Designerr Ltd | Professional & scientific | 2019 |
| THE Dog's House Ltd | Real estate | 2024 |
| THE DUX Digital Ltd | Professional & scientific | 2015 |
| THE Electrical & Plumbing Company Limited | Construction | 1996 |
| THE Essex Thai Massage Company Limited | Health & social care | 2023 |
| THE Eyentist Ltd | Administrative & support | 2024 |
| THE Fairness Forum Limited | Professional & scientific | 2025 |
| THE Fairways (Bentley) Management Company Ltd | Real estate | 2024 |
| THE Fedia Ltd | Administrative & support | 2017 |
| THE Fenland Group Ltd | Water & waste | 2020 |
| THE Film Butcher Limited | Information & communication | 2008 |
| THE Flatbed DIE Company Limited | Manufacturing | 1995 |
| THE Fluent Finance Group Ltd | Financial services | 2015 |
| THE Fluffy Dog Club Ltd | Wholesale & retail | 2025 |
| THE Football Analyst Limited | Education | 2025 |
| THE Fort Management Company Limited | Real estate | 2012 |
| THE Fueled Kitchen Co Ltd | Hospitality | 2026 |
| THE Gadget Cloud Limited | Administrative & support | 2016 |
| THE Galleon Bar (Blackpool) Limited | Hospitality | 2014 |
| THE Games WE Play Ltd | Manufacturing | 2025 |
| THE Garage Door Outlet Limited | Construction | 2021 |
| THE Garment Company Ltd | Manufacturing | 2021 |
| THE Great Tablescape Ltd | Manufacturing | 2023 |
| THE Green (Brentwood) Management Company Limited | Administrative & support | 2007 |
| THE Grove Whitehall Road (Management Company) Limited | Real estate | 2014 |
| THE GUD Constant Ltd | Professional & scientific | 2021 |
| THE H Club London Limited | Wholesale & retail | 2019 |
| THE Hair Lounge Greenwich Limited | Other services | 2020 |
| THE Hand Consulting Limited | Professional & scientific | 2018 |
| THE Handsome Toad Ltd | Information & communication | 2014 |