| SURESAFE2 Ltd | Construction | 2007 |
| Surf the Earth Limited | Extraterritorial | 1996 |
| Surmount Solutions Limited | Administrative & support | 2011 |
| Surrey Home Heating and Plumbing Ltd | Construction | 2023 |
| Susan Stock Designs Limited | Manufacturing | 2002 |
| Susment Limited | Professional & scientific | 2022 |
| Sussex Doctors Limited | Health & social care | 2019 |
| Sussudio Darbyshire Limited | Arts & recreation | 2011 |
| Sust-N Limited | Water & waste | 2010 |
| Sustain Health Magazine Ltd | Information & communication | 2020 |
| Sutivan Ltd | Transport & logistics | 2013 |
| Sutton Finest Ltd | Hospitality | 2024 |
| Suzanne Pigott Consultancy Limited | Professional & scientific | 2023 |
| SV Training Limited | Education | 2022 |
| Svaya Limited | Hospitality | 2025 |
| Swale Indoor Bowling Centre Limited | Arts & recreation | 1998 |
| Swallows Farm Ltd | Agriculture & fishing | 2025 |
| Swan About Limited | Hospitality | 2008 |
| Swan Place Management Company (Yalding) Limited | Households | 1996 |
| SWB Health Limited | Health & social care | 2025 |
| Swedskocert Group Limited | Agriculture & fishing | 2007 |
| Sweet Bites (Kent) Limited | Manufacturing | 2025 |
| Sweetened Cleaning Services Limited | Administrative & support | 2025 |
| Sweetlands Live Ltd | Arts & recreation | 2025 |
| Sweex Ltd | Manufacturing | 2020 |
| Swells IT Ltd | Information & communication | 2019 |
| Swift Developers Ltd | Construction | 2021 |
| Swift Hire Limited | Administrative & support | 2017 |
| Swift Property Management (Kent) Limited | Real estate | 2019 |
| Swift Solar Solutions Ltd | Energy | 2024 |
| Swim Fit With Kate Ltd | Arts & recreation | 2026 |
| Swimming Life Ltd | Education | 2026 |
| Swish Analytics Albion Holdings Limited | Financial services | 2023 |
| Swish Analytics Albion Limited | Information & communication | 2020 |
| SWISS92 Ltd | Wholesale & retail | 2021 |
| Sword Construction UK Limited | Construction | 2005 |
| Sword Rail Limited | Extraterritorial | 2012 |
| SWR Shipping Ltd | Transport & logistics | 2023 |
| SWS Countryside Ltd | Agriculture & fishing | 2022 |
| Syberhost Limited | Information & communication | 2025 |
| Syedmed Ltd | Health & social care | 2025 |
| Symbol (UK) Limited | Education | 1998 |
| Symbol Family Support Services Limited | Health & social care | 2002 |
| Symmons Drylining Ltd | Construction | 2026 |
| Symmons Group Ltd | Professional & scientific | 2019 |
| Synapse Design Ltd | Administrative & support | 2017 |
| Syndicate Marketing Ltd | Professional & scientific | 2016 |
| Synergy EM Solutions Ltd | Professional & scientific | 2024 |
| Synergy Healthcare Private Limited | Professional & scientific | 2023 |
| Synergy Networking Events Ltd | Other services | 2026 |
| Synergy Power Civils Limited | Construction | 2026 |
| Syntium Lift Parts Limited | Wholesale & retail | 2010 |
| Syntium Lifts Limited | Wholesale & retail | 2020 |
| Systems for Safety Ltd | Professional & scientific | 2014 |
| Systems Master Limited | Information & communication | 2017 |
| Systems Value Consultancy Ltd | Information & communication | 2011 |
| Syzygy Financial Consulting Ltd | Administrative & support | 2007 |
| Szak Design Ltd | Wholesale & retail | 2024 |
| Szanto Ltd | Construction | 2020 |
| Szeszcz Ltd | Transport & logistics | 2016 |
| Szig Solutions Ltd | Transport & logistics | 2018 |
| T & F Maintenance Ltd | Administrative & support | 2018 |
| T & S Decor Ltd | Construction | 2023 |
| T & T Care Group Ltd | Health & social care | 2018 |
| T - REX Wear Ltd | Professional & scientific | 2011 |
| T B Building Solutions Ltd | Construction | 2024 |
| T Brown Interiors Limited | Administrative & support | 2010 |
| T E S Investments Limited | Financial services | 2009 |
| T J M Builders (Kent) Ltd | Construction | 2024 |
| T J Surfacing Ltd | Transport & logistics | 2009 |
| T L C Industrial Roofing & Cladding Specialists Limited | Construction | 2009 |
| T P Painting & Decorating Ltd | Construction | 2019 |
| T R Commercials Ltd | Wholesale & retail | 2018 |
| T R Wright Commercial Property Limited | Construction | 2012 |
| T Ventilation Ltd | Manufacturing | 2026 |
| T Woodwork Crawley Limited | Construction | 2014 |
| T&E Assets Limited | Real estate | 2022 |
| T&K Services Ltd | Administrative & support | 2019 |
| T-Ahrc Property Investments Ltd | Real estate | 2024 |
| T-Mex Express Ltd | Wholesale & retail | 2021 |
| T-Mex Limited | Manufacturing | 1999 |
| T-Pro Welding Ltd | Manufacturing | 2026 |
| T-Rex Style Ltd | Construction | 2023 |
| T-Tech South East Limited | Construction | 2018 |
| T. Marian Construction Ltd | Professional & scientific | 2026 |
| T. Nicholson Ltd | Transport & logistics | 2024 |
| T.D.Colley’S Plastering & Decorating Specialists Ltd | Construction | 2025 |
| T3 Holdings Ltd | Financial services | 2025 |
| T4 Tree Surgery Limited | Agriculture & fishing | 2020 |
| TAA Cafe Ltd | Hospitality | 2021 |
| Tabita Management Consultancy Services Ltd | Professional & scientific | 2025 |
| Tacos Locos Sittingbourne Ltd | Hospitality | 2017 |
| Tadi Ltd | Wholesale & retail | 2024 |
| TAG (Maidstone) Ltd | Professional & scientific | 2011 |
| TAG Flooring & Interiors Limited | Construction | 2013 |
| Tage Group Limited | Financial services | 2013 |
| Tage Limited | Wholesale & retail | 2014 |
| Tage London Ltd | Administrative & support | 2014 |
| Tagg Superbikes Limited | Wholesale & retail | 2019 |
| Tahoe Partners Limited | Extraterritorial | 2012 |