| Scientific Wire Company Ltd | Manufacturing | 2003 |
| Scott a Wilson Limited | Construction | 2006 |
| Sean Hargreaves Limited | Information & communication | 2023 |
| Seedy Blenders Limited | Wholesale & retail | 2019 |
| Serutuf Futures Ltd | Financial services | 2015 |
| Sheehan Consulting Limited | Professional & scientific | 2026 |
| Sidcup Equestrian Supplies Limited | Wholesale & retail | 2022 |
| Skysmart MRO Ltd | Administrative & support | 2003 |
| Sleeptight Limited | Administrative & support | 2015 |
| Smith Prestige Cars Limited | Wholesale & retail | 2024 |
| Smiths Homes Ltd | Real estate | 2024 |
| Snoop’S Store Ltd | Wholesale & retail | 2023 |
| Solar Park Plan Limited | Other services | 2025 |
| Sparklers Cleaning Contractors Ltd | Administrative & support | 2012 |
| Spoka Ltd | Manufacturing | 2026 |
| Springfields Planning and Development Limited | Professional & scientific | 2011 |
| ST Edmunds Croft Residents Company Limited | Households | 2021 |
| Staise Ltd | Wholesale & retail | 2023 |
| Steeles Butchers Limited | Wholesale & retail | 2023 |
| Studio Koter Limited | Wholesale & retail | 2023 |
| Survey and Construction Limited | Construction | 2026 |
| SWG Communications Limited | Professional & scientific | 2022 |
| T.J. Green (Financial Services) Limited | Financial services | 1992 |
| Taylors Asset Holdings Ltd | Real estate | 2026 |
| Taylors Service Centres Group Limited | Financial services | 2021 |
| Taylors Service Centres Limited | Wholesale & retail | 2003 |
| TBM Salon Limited | Other services | 2011 |
| TBS Hygiene Limited | Water & waste | 2007 |
| Teaching Buteyko Limited | Education | 2021 |
| THE Aesthetics and Laser Clinic Ltd | Other services | 2017 |
| THE Brook GC Limited | Hospitality | 2022 |
| THE Eagle (Ladbroke Grove) Limited | Hospitality | 2025 |
| THE Essex Centre Limited | Wholesale & retail | 1994 |
| THE Finchingfield Hospitality Company Ltd | Hospitality | 2023 |
| THE Fume Cupboard Company Limited | Construction | 2018 |
| THE Fume Testing Company Limited | Construction | 2026 |
| THE Open Sky Kitchen Company Limited | Construction | 2023 |
| THE Punch Bowl Restaurant Ltd | Hospitality | 2017 |
| THE SIX Bells ST. Albans Limited | Hospitality | 2015 |
| THE Snug of High Easter Limited | Hospitality | 2018 |
| THE Style Sisters Group Ltd | Other services | 2018 |
| Threefrogs Limited | Financial services | 2020 |
| Timbertek Bespoke Flooring Limited | Construction | 2019 |
| TJR Assets Limited | Real estate | 2025 |
| Tonepatrol Limited | Financial services | 2020 |
| Toolchimp Limited | Wholesale & retail | 2020 |
| Top Ices Limited | Hospitality | 2021 |
| Total Building Supplies Limited | Construction | 2022 |
| Total Plastic & Building Supplies Ltd | Wholesale & retail | 2025 |
| Touch Wood Carpentry & Building Services Limited | Construction | 2017 |
| Touchwood Commercial Cleaning Limited | Administrative & support | 2023 |
| Tt-Matics Ltd | Information & communication | 2014 |
| Tubela Engineering Company Limited | Manufacturing | 1945 |
| Tyger IT Consultants Limited | Administrative & support | 2017 |
| Tylers Fine Furniture Ltd | Manufacturing | 2014 |
| UK House of Skin Ltd | Other services | 2015 |
| Undiscovered Publishing Limited | Information & communication | 1994 |
| Undiscovered Recordings Limited | Information & communication | 2000 |
| Uniche Clothing Limited | Wholesale & retail | 2018 |
| Vantasmic Ltd | Wholesale & retail | 2024 |
| Ventastone Ltd | Mining & quarrying | 2026 |
| Vestcrown Limited | Professional & scientific | 2010 |
| Village Cricket Company Limited | Wholesale & retail | 2021 |
| Violet & George (East India) Limited | Hospitality | 2018 |
| Visionary Training Resources Ltd | Education | 2023 |
| Wade & Davies Limited | Professional & scientific | 2011 |
| Walter Mews Limited | Construction | 2019 |
| Walters and Company (Accountants) Limited | Professional & scientific | 2015 |
| Washtec (UK) Limited | Wholesale & retail | 1986 |
| Web Dispensary Ltd. | Professional & scientific | 2008 |
| Webber Collective Ltd | Wholesale & retail | 2026 |
| Westbourne Properties Limited | Professional & scientific | 2015 |
| Westbury Property Consultants Limited | Professional & scientific | 2007 |
| Westbury Ventures Limited | Real estate | 2024 |
| Wildme Ltd | Wholesale & retail | 2020 |
| Woodford Associates Limited | Professional & scientific | 2017 |
| Woodrow Properties Ltd | Administrative & support | 2012 |
| Writtle Wanderers Rugby Club Limited | Arts & recreation | 2015 |
| Xylem Holdings Limited | Wholesale & retail | 1998 |
| Zedelle Ltd | Professional & scientific | 2023 |
| Zulu Plumbing and Heating Ltd | Construction | 2024 |