| THE Window Group Ltd | Construction | 2024 |
| THE ‘C’ Word Ltd | Information & communication | 2026 |
| Theatric Limited | Education | 2018 |
| Theo - Josh & Company Ltd | Health & social care | 2014 |
| Therapy Beau Ltd | Health & social care | 2022 |
| Thermal Acquisition Limited | Construction | 2023 |
| THIRTEEN13 Limited | Other services | 2022 |
| Thorpe Barber Ltd | Other services | 2024 |
| Thorpe Healthcare Ltd | Wholesale & retail | 2021 |
| Thorpe Paddocks Management Company Limited | Households | 2021 |
| Thrive (Essex) CIC | Health & social care | 2025 |
| Time to Transform Ltd | Professional & scientific | 2025 |
| Tims Arbitrage Ltd | Wholesale & retail | 2025 |
| Tinkerbell Boutique Ltd | Wholesale & retail | 2025 |
| Tiny Bloom Play Cafe Ltd | Hospitality | 2025 |
| Tips & Tops Ltd | Other services | 2017 |
| Titman TIP Tools Limited | Manufacturing | 1973 |
| Titman Tools Limited | Manufacturing | 2017 |
| TJL Rendering Ltd | Construction | 2023 |
| TKP Convenience Store Ltd | Wholesale & retail | 2019 |
| TLC Paint Ltd | Construction | 2025 |
| TLC Trading Ltd | Wholesale & retail | 2023 |
| TLT Finishing and Building Services Limited | Construction | 2020 |
| Tmac Building Service Limited | Construction | 2014 |
| TML Financial Consulting Limited | Administrative & support | 2015 |
| TNH Road Ltd | Households | 2024 |
| TO Fires Ltd | Construction | 2025 |
| TO Interiors Ltd | Construction | 2025 |
| Tommy's Timber Limited | Wholesale & retail | 2020 |
| Tonkar Group Limited | Professional & scientific | 2025 |
| Toosey Motorsport Limited | Manufacturing | 2026 |
| Top Class 365 Care Ltd | Health & social care | 2021 |
| Tore Construction Services Ltd | Construction | 2026 |
| Tore Construction UK Limited | Construction | 2023 |
| Total Care Consultants Limited | Professional & scientific | 2021 |
| Total Heating Management Ltd | Construction | 2023 |
| Total Logic Security Limited | Wholesale & retail | 1995 |
| Tower Security (Tendring) Ltd | Administrative & support | 2011 |
| Town Plumbing & Heating Ltd | Construction | 2019 |
| TPW Refurbishments Limited | Construction | 2026 |
| TR Transport Ltd | Transport & logistics | 2024 |
| Treason Films Ltd | Information & communication | 2024 |
| Treetots Ltd | Health & social care | 2019 |
| Trek Logistics Limited | Wholesale & retail | 2019 |
| Trexovia Ltd | Information & communication | 2025 |
| Trichi Ventures Limited | Transport & logistics | 2026 |
| Tristar Photography Limited | Professional & scientific | 2019 |
| True Grade Projects Ltd | Administrative & support | 2022 |
| Truehammer Ltd | Extraterritorial | 2025 |
| TS & LF Ltd | Construction | 2023 |
| TT Trims Ltd | Other services | 2026 |
| Ttkesh Mobile Telecom Services Ltd | Professional & scientific | 2016 |
| Tubtrader Limited | Administrative & support | 2009 |
| Tudor FRY Limited | Hospitality | 2025 |
| Tudor Rise Investments Ltd | Financial services | 2021 |
| Tuna Medical Services Ltd | Health & social care | 2018 |
| Turbo Parts Limited | Wholesale & retail | 2020 |
| Turner and Son's Refrigeration Limited | Construction | 2017 |
| TVS Solutions UK Ltd | Wholesale & retail | 2020 |
| Tweets Limited | Agriculture & fishing | 2007 |
| Twenty Twelve Civils Limited | Construction | 2012 |
| Twinn Limited | Information & communication | 2023 |
| Tyreece in Heels Limited | Information & communication | 2023 |
| Ubiquitous Entertainment Ltd | Information & communication | 2023 |
| UK Care Consultancy Ltd | Professional & scientific | 2025 |
| UK Eco TEC Limited | Professional & scientific | 2009 |
| UK Hydro TEC Limited | Administrative & support | 2023 |
| Ultimate Carp Competitions Ltd | Wholesale & retail | 2026 |
| Unconditional Creations Ltd | Wholesale & retail | 2025 |
| Uniq Services Ltd | Administrative & support | 2025 |
| Universal Cleaning Contractors Limited | Administrative & support | 1996 |
| Uprated Lets Ltd | Real estate | 2024 |
| Upto Strength Ltd | Wholesale & retail | 2025 |
| Urban Flooring Outlet Ltd | Wholesale & retail | 2024 |
| Utopia Commercial Cleaning Services Ltd | Administrative & support | 2020 |
| V&E Construction Ltd | Construction | 2024 |
| Vacant Saints Ltd | Information & communication | 2024 |
| Vaishnav Stores Limited | Wholesale & retail | 2015 |
| Valeda Home Ltd | Real estate | 2025 |
| Valyon Limited | Professional & scientific | 2025 |
| Van Holdings Limited | Financial services | 2024 |
| Vanilla Properties Essex Limited | Real estate | 2025 |
| Vantage Bathrooms Ltd | Construction | 2026 |
| Vbdance Limited | Arts & recreation | 2009 |
| Vega Support Ltd | Professional & scientific | 2023 |
| Vena Holdings Limited | Real estate | 2026 |
| Verdique Ltd | Manufacturing | 2025 |
| Vfcproperties Limited | Real estate | 2021 |
| Vgoc Food and Wine Ltd | Wholesale & retail | 2025 |
| Vibea Games Limited | Manufacturing | 2025 |
| Vicaporityz Ltd | Manufacturing | 2022 |
| Vicki's Vintage Limited | Wholesale & retail | 2001 |
| Village Pet Sitting Ltd | Other services | 2025 |
| Vincent Property Solutions (Essex) Ltd | Construction | 2018 |
| Vine View Properties Ltd | Real estate | 2017 |
| Vintage Collectors Limited | Wholesale & retail | 2023 |
| Violet Sourcing Ltd | Wholesale & retail | 2025 |
| Virtual Assist-Agent Limited | Administrative & support | 2014 |
| Vision Snap Photography Limited | Professional & scientific | 2026 |
| Visual Celebrations Ltd | Professional & scientific | 2011 |