| T&J Services (Herts) Ltd | Construction | 2025 |
| T.J. Wood Groundworks Limited | Construction | 2008 |
| T.W.G. Limited | Professional & scientific | 1991 |
| TAE Investments Ltd | Real estate | 2020 |
| Take Your Seats Ltd | Real estate | 2025 |
| Taltec Ltd | Information & communication | 2021 |
| Tangibility Ltd | Information & communication | 2020 |
| Tarim Automotive Ltd | Wholesale & retail | 2021 |
| Tarim Properties Ltd | Real estate | 2019 |
| Taylor's Skip Hire Ltd | Water & waste | 2020 |
| Tbmanagement & Maintenance Limited | Construction | 2014 |
| Tcdor Limited | Arts & recreation | 2022 |
| Teachall Tutoring Limited | Education | 2016 |
| Techfutara Limited | Information & communication | 2024 |
| Tenants Save Money Limited | Administrative & support | 2020 |
| Terranova Interiors Ltd | Construction | 2025 |
| Terratron Ltd | Real estate | 2022 |
| Tersus Ltd | Administrative & support | 2023 |
| TGM International Ltd | Administrative & support | 2019 |
| TH Transport Ltd | Transport & logistics | 2026 |
| THE Adenuga Group Limited | Real estate | 2025 |
| THE Authentic Souvlaki Ltd | Hospitality | 2017 |
| THE BAD Taste Company Ltd | Wholesale & retail | 2026 |
| THE Bath Room (Sawbridgeworth) Limited | Construction | 2025 |
| THE Boston Arms Property Limited | Real estate | 2003 |
| THE British American Beer Company Ltd | Administrative & support | 2017 |
| THE Build Concept (TBC) Limited | Professional & scientific | 2024 |
| THE Centre Harlow Ltd | Health & social care | 2003 |
| THE Conscious Workplace Limited | Health & social care | 2021 |
| THE Deals Group Ltd | Information & communication | 2017 |
| THE Dog House Sawbo Limited | Other services | 2024 |
| THE Filter Effect Aesthetics Ltd | Other services | 2022 |
| THE Funeral Academy Ltd | Education | 2023 |
| THE Gate (SBW) Ltd | Hospitality | 2023 |
| THE Gift Room Ltd | Wholesale & retail | 2023 |
| THE Herts & Essex Therapy Clinic - Paediatrics & Neurology Ltd | Health & social care | 2016 |
| THE House of Golden Stays Ltd | Real estate | 2026 |
| THE I Practice Limited | Health & social care | 1998 |
| THE Inked Edit Ltd | Other services | 2025 |
| THE IVY Link Ltd | Administrative & support | 2025 |
| THE Limes (Sawbridgeworth) Limited | Real estate | 2009 |
| THE Live in Room Limited | Wholesale & retail | 1983 |
| THE National Society of Allied and Independent Funeral Directors | Other services | 1989 |
| THE Old Bakery (Sawbridgeworth) Limited | Households | 2016 |
| THE Old Dairy Residents Management Company Limited | Households | 2020 |
| THE Palmichael Restaurant Limited | Hospitality | 2008 |
| THE Recruitment Franchise Group Ltd | Financial services | 2024 |
| THE Rent Guarantee Company Ltd | Real estate | 2014 |
| THE Rent Guarantee Company One Ltd | Real estate | 2020 |
| THE Season Shed Ltd | Wholesale & retail | 2021 |
| THE Sixes Agency Ltd | Professional & scientific | 2019 |
| THE Total Steel Solution Ttss Ltd | Manufacturing | 2025 |
| THE Training Collective Ltd | Arts & recreation | 2017 |
| THE Valet (Barber & Shop) London Co Ltd | Other services | 2016 |
| THE Valet (Holdings) Co Ltd | Real estate | 2024 |
| THE Window and Door Studio Ltd | Construction | 2025 |
| THE Yard Sawbridgeworth Ltd | Real estate | 2024 |
| Thebeautyhub Ltd | Other services | 2024 |
| Theopsbox Ltd | Professional & scientific | 2018 |
| Thermal Technik Limited | Construction | 2022 |
| Theydon Construction Limited | Construction | 2011 |
| Theydon Heavy Plant and Storage Ltd | Transport & logistics | 2020 |
| Thomas Solutions Ltd | Construction | 2023 |
| Three Little Trees Ltd | Real estate | 2019 |
| Three Sisters Film Productions Ltd | Information & communication | 2019 |
| Tick Tock Workshop Ltd | Other services | 2023 |
| Tier 1 Driving Ltd | Education | 2025 |
| Timoo Limited | Professional & scientific | 2012 |
| Tinyg (Global Information Network) Limited | Administrative & support | 2020 |
| Titan Haus Ltd | Construction | 2025 |
| Titan Management Group Ltd | Real estate | 2016 |
| Titan UK Investments Limited | Real estate | 2019 |
| TJ Suppliers Limited | Wholesale & retail | 2026 |
| TLT Services (UK) Ltd | Other services | 2013 |
| Tomisa Ltd | Wholesale & retail | 2018 |
| Tommos Tech Ltd | Other services | 2022 |
| Tortoise Performance App Ltd | Education | 2026 |
| Tortoise Performance Ltd | Education | 2021 |
| Total Lift Solutions Limited | Manufacturing | 2017 |
| Tour Moon Productions Ltd | Professional & scientific | 2020 |
| TPR Holdings Limited | Construction | 2017 |
| Trafalgar Mews Property Management (NO.1) Limited | Households | 2001 |
| Training Plus Skills Ltd | Education | 2016 |
| Transact Energy UK Limited | Water & waste | 2010 |
| Transformic Ltd | Information & communication | 2024 |
| Transport & Dgsa Compliance Ltd | Education | 2018 |
| Treble 22 Cars Limited | Transport & logistics | 2016 |
| Trenzio Flat Management Company Limited | Households | 1978 |
| Trevor Steggles Marketing Services Ltd | Administrative & support | 2018 |
| Trgc Devco Ltd | Real estate | 2025 |
| Trgc Group Limited | Real estate | 2021 |
| Trgc Holdings Ltd | Financial services | 2026 |
| Trgc Lets Ltd | Real estate | 2025 |
| Trgc Propco Ltd | Real estate | 2023 |
| Trgc Stays 1 Ltd | Real estate | 2025 |
| Trgc Stays 2 Ltd | Real estate | 2025 |
| Trgc Stays 3 Ltd | Real estate | 2025 |
| Trinity Street Management Limited | Households | 1982 |
| Tuch Digital Limited | Information & communication | 2019 |
| Tudor Business Services Limited | Wholesale & retail | 1995 |