| SRI Technologies (UK) Ltd | Information & communication | 2011 |
| Sridevy Estates Limited | Real estate | 2015 |
| Sridevy Properties Limited | Real estate | 2017 |
| Sridhurkga Ltd | Hospitality | 2022 |
| Sriganga Consulting Limited | Information & communication | 2014 |
| Srihant Limited | Information & communication | 2014 |
| Srimads Housing Ltd | Real estate | 2024 |
| Srisai & SRI Limited | Information & communication | 2013 |
| SRK Accountants Ltd | Professional & scientific | 2020 |
| SRK Finance Partners Limited | Financial services | 2025 |
| Sroya Brothers Ltd | Transport & logistics | 2022 |
| SRS Engineering (Sutton) Ltd | Wholesale & retail | 2014 |
| SRS Surrey Roofing Services Limited | Construction | 2025 |
| SS Air Conditioning Ltd | Energy | 2023 |
| SS Building Work Ltd | Construction | 2021 |
| Ssensational Sounds Ltd | Arts & recreation | 2022 |
| SSG Property Services Ltd | Real estate | 2019 |
| SSK Academy Limited | Other services | 2018 |
| SSK Build Services Limited | Construction | 2025 |
| SSK Solutions Ltd | Information & communication | 2012 |
| SSL UK Services Ltd | Professional & scientific | 2019 |
| Ssquared Properties Limited | Real estate | 2017 |
| SSR Property (Croydon) Ltd | Real estate | 2019 |
| Sstm Ltd | Wholesale & retail | 2010 |
| Sstoyanov Ltd | Construction | 2018 |
| SSV Engineers Limited | Professional & scientific | 2019 |
| Ssvkar Limited | Real estate | 2024 |
| Ssvtm Group Limited | Real estate | 2020 |
| ST Building Solutions Ltd | Construction | 2015 |
| ST Giles Pantry Ltd | Wholesale & retail | 2020 |
| ST James’ Central 8 Ltd | Real estate | 2020 |
| ST Raphael's Hospice | Health & social care | 2018 |
| Stackcare UK Limited | Information & communication | 2019 |
| Stacksages Ltd | Information & communication | 2025 |
| Standard Electric Holdings (UK) Company Limited | Manufacturing | 2021 |
| Stanley PS Ltd | Real estate | 2024 |
| Stanley Roofing Ltd | Construction | 2025 |
| Stanley's Spaces Ltd | Real estate | 2017 |
| STANMORE-80 Ltd | Construction | 2021 |
| Star Care and Health Company Ltd | Health & social care | 2020 |
| Star Parking Limited | Other services | 2008 |
| Star Rock Limited | Real estate | 2017 |
| Star Seed Limited | Health & social care | 2012 |
| Star Vision Limited | Construction | 2014 |
| Starcity Studios Ltd | Information & communication | 2012 |
| Stareurope Tours in UK (PVT) Ltd | Administrative & support | 2019 |
| Stark Quality Limited | Construction | 2018 |
| Starlike Services Limited | Wholesale & retail | 2019 |
| Starling Property Services Ltd | Other services | 2025 |
| Statutory Support Services Limited | Administrative & support | 2003 |
| Stay Safe Electrical Services Ltd | Construction | 2017 |
| Stayton Holdings Ltd | Financial services | 2024 |
| STB Property Group Limited | Other services | 2016 |
| STB Property Management Limited | Households | 2017 |
| STD Properties UK Ltd | Households | 2025 |
| Steel Makers Surrey Ltd | Manufacturing | 2010 |
| Steelhaven Fabrication Limited | Manufacturing | 2025 |
| Stella Pictures Ltd | Professional & scientific | 2012 |
| Stella Property Investments Limited | Real estate | 2013 |
| Stellar Woman Ltd | Manufacturing | 2023 |
| Stenli Ltd | Transport & logistics | 2016 |
| Stephny Systems Limited | Information & communication | 2025 |
| Sterling Estate Group Ltd | Real estate | 2025 |
| Sterling Interpreters Ltd | Professional & scientific | 2026 |
| Sterling Power Services Ltd | Construction | 2025 |
| Sterling Prestige Collection Ltd | Wholesale & retail | 2025 |
| Sterling Rooflights Ltd | Wholesale & retail | 2024 |
| Sternamed Ltd | Professional & scientific | 2025 |
| Stessa Commercial Limited | Real estate | 2017 |
| Stessa Developments Limited | Construction | 2016 |
| Stessa Leisure Holdings Limited | Financial services | 2016 |
| Steve Pratt Pest Control Ltd | Administrative & support | 2018 |
| Steve White Electrical Services Ltd | Construction | 2014 |
| Steven Lloyd Brown Ltd | Extraterritorial | 2024 |
| STG Bathrooms Ltd | Construction | 2016 |
| Sticky Feet Marketing & Events Limited | Professional & scientific | 2016 |
| Stilelibero Limited | Arts & recreation | 2003 |
| Stilson UK Ltd | Other services | 2017 |
| Stino Technologies Ltd | Information & communication | 2025 |
| STK Roofing and Building Ltd | Construction | 2025 |
| STM Contractors Limited | Construction | 2007 |
| STM London Limited | Construction | 2024 |
| STN Service Group Ltd | Administrative & support | 2021 |
| Stock Films Limited | Extraterritorial | 2013 |
| Stone Island Properties Ltd | Real estate | 2021 |
| Stone Pizza & Grill Ltd | Hospitality | 2022 |
| Stonecot Accountants Ltd | Professional & scientific | 2011 |
| Stonecot Food Extra Limited | Wholesale & retail | 2020 |
| Stonecot Heating Services Limited | Wholesale & retail | 2002 |
| Stonedance Ltd. | Wholesale & retail | 2024 |
| Stoneleigh Restaurant Ltd | Hospitality | 2018 |
| Stor Property Ltd | Real estate | 2025 |
| Storage Scout Limited | Administrative & support | 2026 |
| Story Clothing Limited | Wholesale & retail | 2024 |
| Storylines Production Limited | Information & communication | 2017 |
| Stow Capital Ltd | Real estate | 2018 |
| STP Infotech Limited | Other services | 2012 |
| Straight Line Decorating Building & Home Improvements Ltd | Construction | 2026 |
| Stratus Design Limited | Professional & scientific | 2022 |
| Streamline Design Limited | Construction | 2024 |