| Superior Healthcare Recruitment Services Ltd | Administrative & support | 2012 |
| Superior Holdco Limited | Financial services | 2025 |
| Superior Nursing Services Ltd | Health & social care | 2018 |
| Superior Payroll Ltd | Administrative & support | 2022 |
| Superior Specialist Care Limited | Extraterritorial | 2018 |
| Superspeed Design Consultants Ltd | Construction | 2025 |
| Supplytrade Limited | Wholesale & retail | 1995 |
| Support Services Holdings Limited | Real estate | 2019 |
| Supporting Patient Care Limited | Information & communication | 2022 |
| Sureline Support Ltd | Information & communication | 2010 |
| Surface Cleaning Services Ltd | Construction | 2025 |
| Surfers Cottage Limited | Real estate | 2025 |
| Surfraider Solutions Ltd | Information & communication | 2004 |
| Surrey & Kent Home Care Ltd | Health & social care | 2023 |
| Surrey, Kent and Sussex Property Restorations Limited | Other services | 2026 |
| Sushi & Poke Ltd | Hospitality | 2024 |
| Sussex Biotherm Ltd | Extraterritorial | 2023 |
| Sussex View Frant Management Company Limited | Households | 2022 |
| Sustainability Matters Limited | Professional & scientific | 2007 |
| Suum Limited | Real estate | 2016 |
| Suum Projects 1 Ltd | Construction | 2024 |
| SVM Diagnostics Limited | Administrative & support | 2010 |
| Swain Advisory Ltd | Professional & scientific | 2025 |
| Swami Enterprises Ltd | Wholesale & retail | 2020 |
| Swanley BUS Services Limited | Transport & logistics | 2011 |
| Swanley Limited | Extraterritorial | 2013 |
| Swanley Travel Limited | Transport & logistics | 2004 |
| Swastika Trading Limited | Other services | 2016 |
| Sweet ME Ltd | Manufacturing | 2022 |
| Sweet Things & Co UK Ltd | Wholesale & retail | 2025 |
| Swift Solutions London Limited | Construction | 2017 |
| Swift Theatre Services Limited | Administrative & support | 2025 |
| SWP Plastering Ltd | Construction | 2024 |
| SYLLABLE1 Limited | Professional & scientific | 2017 |
| Syloris Ltd | Information & communication | 2023 |
| Symbiotic Smart Homes Ltd | Professional & scientific | 2021 |
| Synergy Active Limited | Wholesale & retail | 2025 |
| Synergy Edge Solutions Ltd | Information & communication | 2024 |
| Syntony (Search & Selection) Limited | Real estate | 1989 |
| T a Craig Limited | Administrative & support | 2013 |
| T B Design & Developments Ltd | Construction | 2020 |
| T Birch Limited | Construction | 2004 |
| T K Upstone Ltd | Real estate | 2019 |
| T LEE Roofing & Guttering Ltd | Construction | 2024 |
| T LEE Trees & Landscapes Ltd | Construction | 2025 |
| T M Wood Design Limited | Construction | 2005 |
| T.D. Geer Limited | Construction | 2004 |
| T.E. Decs Limited | Construction | 2013 |
| T.H.P. Associates Limited | Administrative & support | 2003 |
| T.Hodgson & Partners Ltd | Other services | 2025 |
| T.P. Leeming Associates Limited | Households | 2025 |
| T3 Performance Ltd | Professional & scientific | 2014 |
| TA Programming Ltd | Manufacturing | 2016 |
| TAB Property Services Ltd | Real estate | 2023 |
| Table Gallery Ltd | Hospitality | 2025 |
| Tableprime Limited | Real estate | 1988 |
| Tacpro Solutions Limited | Financial services | 2020 |
| Tahir Optics Ltd | Health & social care | 2023 |
| Tait Properties Ltd | Real estate | 2019 |
| Tajal Foods Ltd | Wholesale & retail | 2026 |
| Tajal Properties Ltd | Real estate | 2020 |
| Talent Cars Ltd | Transport & logistics | 2021 |
| Talent Properties Ltd | Real estate | 2021 |
| Talent Resource Management International Limited | Administrative & support | 2021 |
| Talentsphere Consulting Ltd | Information & communication | 2025 |
| Talking Schools Limited | Education | 2023 |
| Tall Trees Investments Ltd | Financial services | 2022 |
| Talpole Chartering Ltd | Financial services | 2003 |
| Tamoielectric Limited | Manufacturing | 2017 |
| TAN Eazy Ltd | Other services | 2015 |
| Tanaco Properties Limited | Construction | 2024 |
| Tandem Catering (Sevenoaks) Limited | Hospitality | 1999 |
| Tangerine Cars Ltd | Transport & logistics | 2015 |
| Tanglewood Projects Limited | Construction | 2018 |
| Tango IP Limited | Professional & scientific | 2018 |
| Tanners Bank Property LLP | | 2005 |
| Tanton's NUT Butter Ltd | Manufacturing | 2025 |
| TAP in Plumbing Ltd | Construction | 2026 |
| Tapmbet Limited | Information & communication | 2023 |
| Tara Dalton Garden Design Limited | Administrative & support | 2021 |
| Tassell-Dawson Limited | Real estate | 2019 |
| Tasty Spice Global Ltd | Agriculture & fishing | 2019 |
| Tate & Harper Investments Ltd | Real estate | 2024 |
| Tattingstone Management Company Limited | Households | 2013 |
| Tattva Films Ltd | Information & communication | 2021 |
| Tavani & Humphrey Ltd | Hospitality | 2016 |
| Tawakkal Associates Limited | Health & social care | 2014 |
| Taxcorrect Accountants Ltd | Professional & scientific | 2013 |
| Tayf Consulting Ltd | Professional & scientific | 2024 |
| Taylabs Limited | Information & communication | 2026 |
| Taylor Associates Consulting Services Ltd | Professional & scientific | 2023 |
| Taylor Associates Events Ltd | Administrative & support | 2017 |
| Taylor Cole Property Limited | Households | 2020 |
| Taylor Kings Limited | Construction | 2018 |
| Taylor Made PA Services Ltd | Administrative & support | 2026 |
| TB Taxis Limited | Transport & logistics | 2026 |
| TC Fluid Control Limited | Extraterritorial | 2003 |
| Tcdph Limited | Hospitality | 2024 |
| TCM Recruitment Ltd | Administrative & support | 2025 |
| TD Racing Limited | Arts & recreation | 2017 |