| SPL Worldwide Ltd | Wholesale & retail | 2025 |
| Splash Swimming Lessons Ltd | Education | 2025 |
| Splendid Webs Limited | Information & communication | 2017 |
| Sporting Allstars Limited | Information & communication | 2025 |
| Springfield Church | Other services | 2010 |
| Springfield Court (Wallington) Limited | Households | 1995 |
| Springfield Park Residents' Association (Wallington) Limited | Households | 1992 |
| Sprt Consultancy Limited | Professional & scientific | 2019 |
| Square Eyed Films Limited | Information & communication | 2025 |
| Square One Engineering Limited | Professional & scientific | 2014 |
| Srbm Global Limited | Wholesale & retail | 2019 |
| Sreetech Data Matching Ltd | Information & communication | 2018 |
| SRI Bethaas Limited | Information & communication | 2010 |
| SRI Vittal Infotech Limited | Information & communication | 2011 |
| Srico Homes PVT Ltd | Real estate | 2017 |
| Sriharshini Wealth Tech Limited | Information & communication | 2026 |
| SRM Shipping Ltd | Transport & logistics | 2023 |
| SRN Technologies UK Limited | Information & communication | 2018 |
| Srvertex Ltd. | Wholesale & retail | 2015 |
| Srzb Ltd | Wholesale & retail | 2024 |
| Sslt (UK) Ltd | Wholesale & retail | 2022 |
| ST Annes Care Ltd | Health & social care | 2025 |
| ST James House Freehold Limited | Households | 2015 |
| ST Martin's Lane Casting Limited | Other services | 2016 |
| ST. Clair Limited | Other services | 2019 |
| ST. Winifred's Management Co. (Sutton) Limited | Households | 1971 |
| Stable Exhibitions Limited | Administrative & support | 1994 |
| Stable Publishing Limited | Information & communication | 1999 |
| Stafford Croft Limited | Other services | 1990 |
| Staines Commons Limited | Real estate | 2004 |
| Stamford Advisers Limited | Financial services | 2006 |
| Stanistreet Group Ltd | Construction | 2026 |
| Stanley Park Management Limited | Real estate | 1986 |
| Stanley Road Freehold Ltd | Households | 2023 |
| Star Fire Consultancy Limited | Administrative & support | 2023 |
| Star Seven Group Ltd | Real estate | 2023 |
| Starrett Court Freehold Limited | Households | 2017 |
| Startup Assist UK Ltd | Administrative & support | 2020 |
| Startup Local Ltd | Administrative & support | 2020 |
| Stateless Ltd | Information & communication | 2005 |
| Stayton Road Limited | Construction | 2020 |
| Steelecoenergy Ltd | Manufacturing | 2025 |
| Steinert UK Limited | Manufacturing | 2003 |
| Stellarkits Ltd | Wholesale & retail | 2025 |
| Stephanie Lamm Ltd | Other services | 2023 |
| Stephenson Capital Holdings Limited | Financial services | 2024 |
| Stepup.One Ltd | Information & communication | 2021 |
| Sterling Auto Care Ltd | Wholesale & retail | 2026 |
| Sterling Commercial Property Services Ltd | Real estate | 2020 |
| Sterling Estates Group Limited | Real estate | 2022 |
| Sterling IT Tech Ltd | Information & communication | 2026 |
| Stirlight Healthcare Ltd | Extraterritorial | 2022 |
| Stone & Vale Properties Ltd | Construction | 2025 |
| Stone Blue AI Ltd | Information & communication | 2025 |
| Stone Blue Estates Limited | Real estate | 2018 |
| Stones Constructions Ltd | Construction | 2019 |
| Story PR Limited | Professional & scientific | 2008 |
| Stpr Investment Management Ltd | Real estate | 2025 |
| Strategy BI Limited | Information & communication | 2011 |
| Strategy Limited | Professional & scientific | 1990 |
| Strategysmith Ltd | Professional & scientific | 2026 |
| Strictly Developments Ltd | Construction | 2013 |
| STS Investment and Development Limited | Real estate | 2021 |
| Studio Formae Ltd | Professional & scientific | 2026 |
| Studio Féyce Ltd | Professional & scientific | 2025 |
| Studio Tate Limited | Professional & scientific | 2023 |
| Study Circle London Limited | Professional & scientific | 2023 |
| Study Plus International Ltd | Education | 2025 |
| Stylus Residents Management Company Limited | Households | 2004 |
| Subam Constructions Ltd | Construction | 2020 |
| Subam Foods Ltd | Wholesale & retail | 2025 |
| Subam Properties Ltd | Real estate | 2021 |
| Subam Spin&Shine Ltd | Other services | 2025 |
| Suka 24 Staffing Ltd | Administrative & support | 2025 |
| Sun IT Pro Consultancy Limited | Information & communication | 2024 |
| Sun Meridian Limited | Information & communication | 2025 |
| Sunburnt Saints Publishing Ltd | Information & communication | 2026 |
| Sunday Maria Healthcare Limited | Health & social care | 2018 |
| Sunita Mehta Ltd | Professional & scientific | 2018 |
| Sunrise Imaging (Emea) Limited | Manufacturing | 2004 |
| Sunshine Farm Produce Limited | Wholesale & retail | 2014 |
| Super 24 Care Ltd | Health & social care | 2022 |
| Super Sale Ltd | Wholesale & retail | 2020 |
| Supercar Parts Ltd | Wholesale & retail | 2026 |
| Superchefs Technologies Ltd | Manufacturing | 2020 |
| Supplyverse Ltd | Wholesale & retail | 2020 |
| Surrey Blood Test Ltd | Health & social care | 2021 |
| Surrey Brows & Lashes Ltd. | Other services | 2022 |
| Surrey Burners Limited | Wholesale & retail | 2015 |
| Surrey Car Service Ltd | Transport & logistics | 2024 |
| Surrey Clinic (Wallington) Limited | Health & social care | 2014 |
| Surrey Golfers Group Limited | Arts & recreation | 2017 |
| Surrey Golfers Limited | Arts & recreation | 2017 |
| Surrey Hypnotherapy Limited | Wholesale & retail | 2010 |
| Surrey Osteopaths RK Ltd | Health & social care | 2011 |
| Surrey Stationers Ltd | Wholesale & retail | 2011 |
| Suryaputra Limited | Health & social care | 2026 |
| Sussex Coast Flats Ltd | Real estate | 2023 |
| Sustainable Boardroom Excellence Limited | Professional & scientific | 2014 |
| Sustainable Infrastructure Solutions Limited | Other services | 2009 |