| Station Bridge Mews Management Company Limited | Real estate | 2020 |
| Station Garage Ongar Ltd | Wholesale & retail | 2023 |
| Statisma Group Holdings Limited | Administrative & support | 2017 |
| Statisma News & Data Limited | Administrative & support | 2017 |
| Statisma Telecom Limited | Administrative & support | 2017 |
| Steam ME Ltd | Manufacturing | 2025 |
| Stebaker Limited | Information & communication | 2012 |
| Sterling Systems UK Limited | Administrative & support | 2025 |
| Sterling UK Site Services Limited | Construction | 2025 |
| Stibe Shami Limited | Hospitality | 2013 |
| Stmg Ltd | Financial services | 2020 |
| Stork Nest Limited | Real estate | 2026 |
| Stratstone Developments London Ltd | Construction | 2019 |
| Stratstone Estates Ltd | Real estate | 2020 |
| Stratstone Facilities Ltd | Construction | 2019 |
| Stratstone Group Limited | Financial services | 2022 |
| Stratstone X Limited | Financial services | 2024 |
| Stratton Place Residential Ltd | Real estate | 2010 |
| Street Ecom Ltd | Wholesale & retail | 2025 |
| Street WOK Ongar Limited | Hospitality | 2026 |
| Stuart Humphrey Limited | Administrative & support | 2007 |
| Sunny Side Real Estate Limited | Real estate | 2018 |
| Sunrise SD1 Ltd | Construction | 2023 |
| Sunrise SD2 Ltd | Real estate | 2023 |
| Supermagic Coaching Ltd | Education | 2019 |
| Supply Drop Competitions Ltd | Wholesale & retail | 2020 |
| Sweety Treats Ltd | Hospitality | 2025 |
| SWW Engineering Services Ltd | Professional & scientific | 2024 |
| Symmetry Aesthetics Ltd | Health & social care | 2024 |
| Synergy Trade Ltd | Wholesale & retail | 2023 |
| Sytech U.K. Limited | Information & communication | 1996 |
| T G Thermal Limited | Construction | 2017 |
| T Pines Building Services Ltd | Construction | 2023 |
| T&S Garden Services Ltd | Administrative & support | 2025 |
| T.H.Lea (Bishop's Stortford) Limited | Real estate | 1962 |
| Tabbers Employee Ownership Trustees Limited | Financial services | 2022 |
| Tabbers Holdings Limited | Financial services | 2013 |
| Tabbers Limited | Manufacturing | 1997 |
| Tabios Realty & Co Limited | Real estate | 2022 |
| Tailor Made Cleaning Services Ltd | Administrative & support | 2016 |
| Talbro Floor Coverings Ltd | Construction | 2020 |
| Talking Rugby Limited | Information & communication | 2004 |
| Talper Send Provision Ltd | Education | 2023 |
| Tatex Pressings Limited | Manufacturing | 2008 |
| Taylorglaze Ltd | Construction | 2000 |
| TCG Disiti Ltd. | Administrative & support | 2010 |
| TDS Electrics Limited | Construction | 2019 |
| TDW Digital Solutions Ltd | Information & communication | 2021 |
| TEC Security Contractors Limited | Administrative & support | 2019 |
| Tech Planet Accessories Ltd | Wholesale & retail | 2021 |
| Tech Viro Limited | Information & communication | 2020 |
| Technical Initiatives UK Limited | Administrative & support | 2010 |
| Tectum Aerial Mapping Company Ltd | Professional & scientific | 2024 |
| Telepower (Europe) Limited | Construction | 2011 |
| Teresina Capital Ltd | Financial services | 2015 |
| Terra-Kota Ltd | Real estate | 2023 |
| TES Electrical Services Ltd | Construction | 2019 |
| TGC Scaffolding Ltd | Construction | 2026 |
| THE Alpaca Shop Limited | Agriculture & fishing | 2012 |
| THE Aviation Investor Limited | Professional & scientific | 2024 |
| THE Coach House Limited | Real estate | 2015 |
| THE Compass Consultancy WC Ltd | Real estate | 2025 |
| THE Digital Content Factory Ltd | Information & communication | 2023 |
| THE DIY Store Limited | Wholesale & retail | 2011 |
| THE Dobie Group Ltd | Real estate | 2025 |
| THE Eagle PUB Ongar Road Ltd | Hospitality | 2025 |
| THE Enchanted Teapot Ltd | Hospitality | 2025 |
| THE Fingerprints Society CIC | Education | 2024 |
| THE Flitch of Bacon Limited | Hospitality | 2014 |
| THE FMF Group Ltd | Financial services | 2019 |
| THE FMF Property Co. Ltd | Real estate | 2021 |
| THE Funky Collection Ltd | Financial services | 2024 |
| THE Good Debt Company Ltd | Financial services | 2023 |
| THE Ground Rent Brokers Limited | Real estate | 2010 |
| THE Ground Rent Business Limited | Real estate | 2009 |
| THE Hormone Pharmacist Ltd. | Health & social care | 2020 |
| THE Imagination Practice Limited | Financial services | 2026 |
| THE Marquee Experience Company Limited | Administrative & support | 2009 |
| THE Neutral Baby Club Ltd | Wholesale & retail | 2023 |
| THE Ongar Delicatessen Ltd | Wholesale & retail | 2020 |
| THE Perfect PA Limited | Health & social care | 2014 |
| THE Plumbing Company (UK) Limited | Construction | 2007 |
| THE Product Partners Limited | Professional & scientific | 2022 |
| THE Rally Rooms Ltd | Wholesale & retail | 2025 |
| THE Recessionist Limited | Real estate | 2010 |
| THE Redwoods Property Company Limited | Households | 2010 |
| THE Sausage Dog House Daycare Ltd | Agriculture & fishing | 2023 |
| THE Sausage Dog House Hotel Ltd | Agriculture & fishing | 2023 |
| THE Siddall Manufacturing Company Ltd | Manufacturing | 2015 |
| THE Social Goodness Charitable Foundation Ltd | Administrative & support | 2008 |
| THE Social Shop Limited | Other services | 2012 |
| THE Stag Ltd | Hospitality | 2025 |
| Thebiriyanibowl Ltd | Hospitality | 2021 |
| Theydon Growers Limited | Agriculture & fishing | 1987 |
| Theydon Retirement Property Limited | Real estate | 2024 |
| Thgc (2019) Limited | Arts & recreation | 2019 |
| Thompson Hughes Essex Accountants Limited | Professional & scientific | 2018 |
| Thorncroft Limited | Financial services | 2013 |
| Threesix Works Ltd | Wholesale & retail | 2026 |
| Thurston Engineering Limited | Wholesale & retail | 1998 |