| SID Demolition Limited | Extraterritorial | 2015 |
| Silverline Chauffeurs Limited | Transport & logistics | 1999 |
| SJT Carpentry Contractors Limited | Construction | 2025 |
| Sky PUB Management Limited | Administrative & support | 2014 |
| SMH Professional Services Ltd | Administrative & support | 2016 |
| Specialist Trade Courses Limited | Administrative & support | 2010 |
| Spellbrook Barns Ltd | Households | 2024 |
| SSP Consultancy Limited | Professional & scientific | 2006 |
| SSR Properties Limited | Administrative & support | 2017 |
| Stacey Cockram Limited | Professional & scientific | 2026 |
| Sungrove Limited | Hospitality | 2017 |
| T & T Portfolio Ltd | Real estate | 2022 |
| Tangled Systems Ltd | Information & communication | 2022 |
| Tema International Limited | Information & communication | 1980 |
| THE Old Slate Yard Ltd | Wholesale & retail | 2010 |
| THE Sycamore Private Practice Ltd | Other services | 2019 |
| Three a Limited | Other services | 2002 |
| Toddbrook Investments Limited | Administrative & support | 2007 |
| Toddbrook Leisure Limited | Administrative & support | 2015 |
| Tonic Sound Limited | Professional & scientific | 2013 |
| Tt&K LLP | | 2022 |
| Tylan Interiors Limited | Construction | 2001 |
| Unbeweavable Hair Ltd | Other services | 2018 |
| Walters Wheels Limited | Wholesale & retail | 2018 |
| Westgreen Projects Limited | Construction | 2021 |
| Wilnett Court Management Limited | Extraterritorial | 1977 |
| Wilnett Court Property Management Ltd | Real estate | 2000 |