| TC Software Solutions Ltd | Professional & scientific | 2023 |
| TCH Property Ltd | Real estate | 2024 |
| Tdntech Limited | Information & communication | 2026 |
| Teamample Limited | Households | 1986 |
| Tekkdog Ltd | Information & communication | 2024 |
| Temerity Media Limited | Administrative & support | 2008 |
| Templars Properties Limited | Arts & recreation | 2018 |
| Tenbit Digital Limited | Information & communication | 2026 |
| Tentan UK Ltd | Health & social care | 2009 |
| Tera Ventures Ltd | Financial services | 2023 |
| Terraforma Infrastructure Limited | Construction | 2012 |
| Terralec Limited | Wholesale & retail | 1993 |
| Test Inc Projects Limited | Construction | 2021 |
| Test Incorporated Limited | Professional & scientific | 2012 |
| Tewkesbury Business Park Management Limited | Real estate | 2005 |
| Texdnmfrm Ltd | Health & social care | 2019 |
| TFA Design Ltd | Professional & scientific | 2008 |
| TFC Carpentry & Construction Ltd | Construction | 2023 |
| TFJ Utilities Limited | Construction | 2023 |
| Thames Brewery Ltd | Manufacturing | 2022 |
| That Beautiful Mind Limited | Wholesale & retail | 2017 |
| THE Anchorage Building Company Limited | Construction | 2019 |
| THE Antiquity Enterprise Group LLP | | 2021 |
| THE Basement Conversion Company Limited | Construction | 2010 |
| THE BD Holding Group Limited | Financial services | 2024 |
| THE Beauty Shed & Clinic Ltd | Other services | 2022 |
| THE Boris Abrams Group Limited | Health & social care | 2023 |
| THE BRA Consultancy Ltd | Wholesale & retail | 2020 |
| THE Branded Wholesaler Ltd | Wholesale & retail | 2022 |
| THE Brickfields Trust | Education | 2016 |
| THE Coast Partnership Ltd | Professional & scientific | 2020 |
| THE Cocktail School Limited | Other services | 2019 |
| THE Construction Shop Limited | Administrative & support | 1997 |
| THE Cosy Hollow Limited | Wholesale & retail | 2022 |
| THE Cottage Kitchen Limited | Hospitality | 2024 |
| THE Cultural Engine CIC | Professional & scientific | 2013 |
| THE DJ Ritchie Eames Academy Ltd | Arts & recreation | 2025 |
| THE Enchanted Cottage Limited | Other services | 2017 |
| THE Events Emporium Limited | Arts & recreation | 2022 |
| THE Farmer Injury, Resuscitation & Specialist Training Group Limited | Education | 2016 |
| THE Final Table Limited | Administrative & support | 2024 |
| THE Garden Retreat (Rochford) Limited | Other services | 2017 |
| THE Gatehouse Residents Limited | Extraterritorial | 2024 |
| THE GD Holding Group Limited | Financial services | 2021 |
| THE Global Waste LAB Ltd | Professional & scientific | 2023 |
| THE Golf Store Limited | Wholesale & retail | 2014 |
| THE Herb Society Limited | Other services | 1998 |
| THE Honest Bar Limited | Wholesale & retail | 2026 |
| THE House Club Venue Limited | Administrative & support | 2016 |
| THE Kebab Club Ltd | Wholesale & retail | 2023 |
| THE Kennedy Partnership Ltd | Administrative & support | 1993 |
| THE King Edmund School | Education | 2011 |
| THE Kitchen and Loft Company Limited | Construction | 2013 |
| THE Laughing Pear Catering Limited | Hospitality | 2023 |
| THE Laughing Pear Limited | Hospitality | 2020 |
| THE LD Group Ltd | Construction | 2012 |
| THE Legacy Funding Corporation Ltd | Administrative & support | 2011 |
| THE Lounge (Radio) Station Limited | Information & communication | 2019 |
| THE MED Oven Ltd | Wholesale & retail | 2025 |
| THE Mercury Foundation | Education | 2018 |
| THE Mindful Surfer Ltd | Wholesale & retail | 2021 |
| THE Mortgage Academy Ltd | Financial services | 2022 |
| THE Mortgage Clinic Limited | Financial services | 1996 |
| THE Mortgage Shopper Ltd | Financial services | 2025 |
| THE Mortgage. Market (TMM) Limited | Financial services | 2025 |
| THE Move Groove Limited | Real estate | 2021 |
| THE Nurse-Led Clinic Ltd | Health & social care | 2025 |
| THE Plumb Tank Ltd | Construction | 2024 |
| THE Pretty Perfect App Limited | Information & communication | 2025 |
| THE Property Brolly Limited | Other services | 2023 |
| THE Removal Room Limited | Other services | 2025 |
| THE Retro Villa Ltd | Wholesale & retail | 2021 |
| THE Rochford Hundred Golf Club Limited | Arts & recreation | 1973 |
| THE Rochford Project Limited | Wholesale & retail | 2016 |
| THE RTR Group Nationwide Limited | Construction | 2017 |
| THE Shoeburyness Hotel Bar & Restaurant Ltd | Hospitality | 2024 |
| THE Sipping Group Ltd | Wholesale & retail | 2025 |
| THE Smokehouse and Grill Group Limited | Hospitality | 2023 |
| THE V-Assist Essex Ltd | Administrative & support | 2025 |
| THE Worlds a Picture Limited | Arts & recreation | 2012 |
| THE Wyckes RTM Company Ltd | Households | 2013 |
| Thegreenagents.Com Ltd | Information & communication | 2025 |
| Thermal Insulating Solutions Ltd | Construction | 2021 |
| Thermoshield Windows Limited | Construction | 1983 |
| Thomas Electrical Essex Limited | Construction | 2002 |
| Thornhill Management Services Limited | Professional & scientific | 2016 |
| Thorough Care Corporation Ltd | Health & social care | 2016 |
| THS Concepts Limited | Professional & scientific | 2013 |
| THS Holdings (Essex) Limited | Financial services | 2020 |
| Tidal View Ltd | Information & communication | 2014 |
| Tidal Wave Cleaning Limited | Administrative & support | 2020 |
| TIM Flynn Architect Limited | Professional & scientific | 2022 |
| Timbercut Builders Limited | Manufacturing | 2025 |
| Timbo House 2023 Ltd | Hospitality | 2023 |
| Times and Space Ltd | Health & social care | 2022 |
| Tintera Limited | Extraterritorial | 1961 |
| Tj&A Limited | Professional & scientific | 2015 |
| TJ4 Limited | Administrative & support | 2024 |
| TKM Medicals Limited | Health & social care | 2015 |
| TLA Finishing Solutions Ltd | Construction | 2023 |