| T.A.B Security Solutions Ltd | Administrative & support | 2024 |
| T.A.B. Property Maintenance Limited | Administrative & support | 1998 |
| T.G.Collins Solicitors Ltd | Professional & scientific | 2019 |
| Ta'Lia School of Performing Arts Limited | Arts & recreation | 2016 |
| Tabula Rasa Laser Ltd | Other services | 2019 |
| Taccs Accountancy Ltd | Professional & scientific | 2010 |
| Tacozen Restaurant Limited | Hospitality | 2024 |
| Talulah Stationery Ltd | Wholesale & retail | 2023 |
| Tame Media Ltd | Information & communication | 2024 |
| Tamerisk Ltd | Construction | 2019 |
| Tams, Evans & Dainty Ltd | Real estate | 2021 |
| TAN Software Limited | Information & communication | 2024 |
| Tangerine River Ltd | Arts & recreation | 2018 |
| Tanuken Enterprises Ltd | Other services | 2021 |
| Tapferkeit Limited | Wholesale & retail | 2018 |
| TAR Homes Rainham Ltd | Real estate | 2022 |
| Target GAS and Heating Limited | Construction | 2018 |
| Tate B Consultancy Ltd | Health & social care | 2022 |
| Tax and Accounts Experts Ltd | Professional & scientific | 2021 |
| Tayke Five Ltd | Construction | 2025 |
| Taylor Made Glazing Ltd | Construction | 2014 |
| Taylor Made Toastmaster Limited | Professional & scientific | 2018 |
| Taylorellle Design Ltd | Professional & scientific | 2019 |
| Tcis Group Limited | Construction | 2015 |
| TCS Electrical Ltd | Construction | 2018 |
| Tdnk Ltd | Real estate | 2025 |
| Team Hayler Dressage Ltd | Administrative & support | 2012 |
| Team Solutions London Limited | Administrative & support | 2014 |
| Tech Electrical & Mechanical Limited | Construction | 2006 |
| TECH23 Recruitment Ltd | Administrative & support | 2020 |
| Technical Lift Consultancy Limited | Professional & scientific | 2004 |
| Technique Hold Co Limited | Financial services | 2024 |
| Technique Plus Limited | Financial services | 2015 |
| Technique Tyres 2 Limited | Wholesale & retail | 2022 |
| Technique Tyres Limited | Wholesale & retail | 1990 |
| Technotainment Limited | Information & communication | 2017 |
| Techsos Ltd | Information & communication | 2007 |
| Tecprint (UK) Limited | Manufacturing | 1986 |
| Teddyswiss Investments Limited | Real estate | 2022 |
| Teeshine Cleaning Co. Limited | Administrative & support | 2025 |
| Television Repairs Ltd | Information & communication | 2024 |
| Temple Law Limited | Professional & scientific | 1999 |
| Templewood Court Limited | Administrative & support | 1989 |
| Tenisu Ltd | Health & social care | 2025 |
| Tenmade Ltd | Wholesale & retail | 2025 |
| Tennis Coach Club Limited | Arts & recreation | 2014 |
| Terok Campers Ltd | Manufacturing | 2026 |
| TF Manufacturing & Quality Consulting Ltd | Professional & scientific | 2026 |
| TGM Carpentry Services Ltd | Manufacturing | 2026 |
| TGM Electrics Ltd. | Professional & scientific | 2016 |
| Tgmg Restore Ltd | Wholesale & retail | 2024 |
| TH Studio Limited | Other services | 2014 |
| Thames Estuary Construction Ltd | Construction | 2007 |
| Thames Side Mechanical Limited | Construction | 2026 |
| Thames View Residents Association (Hadleigh) Limited | Households | 1980 |
| Thames View Tenants' Association Limited | Households | 1997 |
| That Gift 4 U Ltd | Wholesale & retail | 2026 |
| Thayavu Limited | Manufacturing | 2025 |
| THE 5 Pence Partners Limited | Professional & scientific | 2015 |
| THE 996 Shed Ltd | Wholesale & retail | 2024 |
| THE Almond Tree @ Mechex Limited | Health & social care | 2026 |
| THE Antony J. Holdsworth Company Ltd | Professional & scientific | 2004 |
| THE Bali Adventure Limited | Administrative & support | 2016 |
| THE Barbers HUT - Benfleet Ltd | Other services | 2024 |
| THE Batic Partnership Trust | Education | 2011 |
| THE Beach Retreat (Southend) LLP | | 2018 |
| THE Beeches Dental Practice Limited | Health & social care | 2010 |
| THE Big Bright Business Limited | Professional & scientific | 2026 |
| THE Big Business Holding Co Ltd | Financial services | 2024 |
| THE Blind & Curtain Company Limited | Manufacturing | 2014 |
| THE Breakaway Collection Ltd | Hospitality | 2024 |
| THE Bull Room Ltd | Arts & recreation | 2025 |
| THE Challengers and Adventurers Limited | Administrative & support | 2025 |
| THE Chelsea Clinic Kensington Ltd | Health & social care | 2022 |
| THE Cosmetic Club UK Limited | Other services | 2019 |
| THE CUT Inn (Essex) Limited | Other services | 2021 |
| THE Davies Exchange Ltd | Administrative & support | 2022 |
| THE Dealership Ltd | Wholesale & retail | 2023 |
| THE Dedham Coffee Collective Ltd | Hospitality | 2024 |
| THE Diversity Lounge Ltd | Health & social care | 2025 |
| THE Dressmaker Bridal Limited | Administrative & support | 2017 |
| THE Dressmaker Fabrics Limited | Wholesale & retail | 2019 |
| THE Dressmaker Limited | Administrative & support | 2017 |
| THE Elmo Collective Ltd | Professional & scientific | 2021 |
| THE Enchanted Wood Day Nursery Limited | Health & social care | 2010 |
| THE Engenuiti Partnership LLP | | 2011 |
| THE Epsilon Star Trust | Education | 2011 |
| THE Equity Partnership Limited | Real estate | 2005 |
| THE Eviction Group Ltd | Professional & scientific | 2024 |
| THE Fitness Lodge Limited | Arts & recreation | 2014 |
| THE Flexible Building Company Limited | Construction | 2016 |
| THE Football Club Ltd | Arts & recreation | 2025 |
| THE Freight People Limited | Transport & logistics | 2002 |
| THE Garage (Potters Hill) Ltd | Wholesale & retail | 2018 |
| THE Gate Inn (Saffron Walden) Ltd | Hospitality | 2010 |
| THE Gospel Project Limited | Manufacturing | 2021 |
| THE Great Motorcycle Giveaway Ltd | Wholesale & retail | 2023 |
| THE Hadleigh Kitchen Limited | Hospitality | 2019 |
| THE Hawthorns Management Company Limited | Real estate | 2001 |
| THE Infinity Studio Essex Limited | Arts & recreation | 2024 |