| SSV Homes Limited | Real estate | 2022 |
| ST John Global Ltd | Real estate | 2018 |
| ST Margarets Mews Residents Company Limited | Households | 1999 |
| ST. Bernards Property Management Company Limited | Households | 2000 |
| ST. Mary's Gardens Chessington Management Company Limited | Households | 2012 |
| Stabilobuild Ltd | Construction | 2015 |
| Staceys Spuds N Snacks Ltd | Hospitality | 2025 |
| Stags Barber Shop Ltd | Other services | 2013 |
| Stancliffe Darley Dale Limited | Real estate | 2018 |
| Standlake Business Park Limited | Professional & scientific | 2018 |
| Standlake Industrial Parks Ltd | Real estate | 2019 |
| Star Executive UK Limited | Administrative & support | 2025 |
| Star Investment (PVT) Ltd | Real estate | 2021 |
| Star-Tec Engineering Ltd | Wholesale & retail | 2009 |
| State Security UK Ltd | Administrative & support | 2025 |
| Stay at Homes (UK) Ltd | Hospitality | 2012 |
| Steelfort Logistics Ltd | Construction | 2019 |
| Steelfort Security (West) Ltd | Administrative & support | 2019 |
| Steely's Limited | Real estate | 2021 |
| Stefanova Consulting Ltd | Transport & logistics | 2025 |
| Stellar Home and Interiors Limited | Wholesale & retail | 2020 |
| Stellar Interiors Limited | Professional & scientific | 2011 |
| Stennett Atkinson Building Solutions Limited | Construction | 2025 |
| Sterlingworth Capital Ltd | Real estate | 2026 |
| Sterlingworth Group Ltd | Financial services | 2023 |
| Sterlingworth Surveyors Ltd | Professional & scientific | 2020 |
| Steve Gilbey Classics Limited | Wholesale & retail | 2017 |
| Stevenage Realty Limited | Real estate | 2024 |
| Stevensons Developments Ltd | Construction | 2020 |
| Stevensons Strategic Land Ltd | Extraterritorial | 2024 |
| Still Good Soup Ltd | Information & communication | 2025 |
| Stirling Residential Solutions Limited | Professional & scientific | 2008 |
| Stls Events Ltd | Administrative & support | 2018 |
| Stls Hold Co Limited | Financial services | 2023 |
| STM C & C Ltd | Real estate | 2006 |
| STM L & C Ltd | Professional & scientific | 2020 |
| Stone Fashion London Ltd | Construction | 2014 |
| Stonecare Cleaning Services Ltd | Administrative & support | 2017 |
| Stork Build Ltd | Construction | 2026 |
| Stratton Court Residents Company Limited | Households | 1966 |
| Streets Flowers ST Margaret’S Ltd | Wholesale & retail | 2026 |
| Streets of ST Margaret's Limited | Wholesale & retail | 2024 |
| Strobe Entertainment Ltd | Arts & recreation | 2021 |
| Structura UK Limited | Manufacturing | 1990 |
| Stuart Lodge (New Malden) Limited | Professional & scientific | 1991 |
| Stulz U.K. Limited | Energy | 1987 |
| Stylaaa Ltd | Other services | 2025 |
| Style My View Limited | Manufacturing | 2021 |
| Sublimatic Ltd | Manufacturing | 2024 |
| Subrina Ltd | Real estate | 2019 |
| Subsea Fields Ltd | Construction | 2026 |
| SUK EOT Limited | Administrative & support | 2025 |
| Sunhill Holding Ltd | Hospitality | 2023 |
| Sunny Farm Inc Ltd | Arts & recreation | 2020 |
| Sunshinemoonbeam Developments Ltd | Construction | 2023 |
| Super Moves Logistics Ltd | Transport & logistics | 2025 |
| Supercar Bruce Works Limited | Wholesale & retail | 2025 |
| Superior Heights Scaffolding Limited | Construction | 2019 |
| Supra Recruitment Services Ltd | Administrative & support | 2024 |
| Surrey Clad Ltd | Construction | 2020 |
| Surrey Dents and Scratches Limited | Wholesale & retail | 2015 |
| Surrey Heights Management Company Limited | Households | 2003 |
| Surrey Hills Leisure Ltd | Hospitality | 2010 |
| Surrey Homes Limited | Other services | 2003 |
| Surrey Honey Farm Limited | Agriculture & fishing | 2016 |
| Surrey Local Tradesmen Limited | Construction | 2017 |
| Surrey Mot's Ltd | Professional & scientific | 2020 |
| Surrey Select Executive Cars Limited | Transport & logistics | 2012 |
| Surrey Service Centre Ltd | Wholesale & retail | 2025 |
| Surrey Starlets Ltd | Other services | 2012 |
| Sushi EYE Ltd. | Hospitality | 2004 |
| Sustainable Electrical Services Ltd | Construction | 2022 |
| SVL PVT Limited | Real estate | 2025 |
| Swan Civils Ltd | Construction | 2019 |
| Sweat Escapes Limited | Arts & recreation | 2024 |
| Sweet Portugal Ltd | Hospitality | 2022 |
| Swift Solutions LDN Limited | Wholesale & retail | 2022 |
| Swift Solutions LDN Valet Ltd | Administrative & support | 2023 |
| Switch Electrical Ltd | Construction | 2022 |
| Sydney's Gardening and Landscape Limited | Administrative & support | 2016 |
| Synapai Digital Ltd | Information & communication | 2025 |
| Synergy Projects London Ltd | Construction | 2018 |
| Szymanski Estates Limited | Real estate | 2021 |
| T & R Paving Limited | Construction | 2006 |
| T & S Property Maintenance Limited | Construction | 2017 |
| T&J Sons Ltd | Real estate | 2021 |
| T&T Agency Ltd | Wholesale & retail | 2015 |
| T4-UK Limited | Wholesale & retail | 2006 |
| Tabbouleh Kingston Ltd | Hospitality | 2022 |
| TAG Online Travel Consultancy Ltd | Professional & scientific | 2023 |
| Talentory Ltd | Administrative & support | 2025 |
| Tally WU Associates Limited | Professional & scientific | 2022 |
| Tamil Women in Business Limited | Other services | 2025 |
| Tamimi International Corp Ltd | Real estate | 2025 |
| Tangerine Tax Limited | Professional & scientific | 2021 |
| Taotaodoo Ltd | Wholesale & retail | 2024 |
| Target Sports Coaching Ltd | Arts & recreation | 2009 |
| Tavister Limited | Professional & scientific | 1997 |
| Taxi Auctions Ltd | Wholesale & retail | 2007 |
| Taylor-Hammond Associates Ltd | Manufacturing | 2012 |