| Snak Brands UK Limited | Wholesale & retail | 2025 |
| Snapshop Haven Ltd | Wholesale & retail | 2025 |
| Snowdrop Laundry People Limited | | 1985 |
| Snowstar Ltd | Transport & logistics | 2003 |
| SO Good Organic Ltd | Wholesale & retail | 2017 |
| Social Sprint Marketing Ltd | Professional & scientific | 2026 |
| Sofi Scale Limited | Administrative & support | 2023 |
| Softsquare Limited | Information & communication | 2013 |
| Sohot Property Limited | Real estate | 2012 |
| Solar Reflective Limited | Professional & scientific | 2022 |
| Soleil Sparks Ltd | Construction | 2019 |
| Solly Molly Ltd | Hospitality | 2025 |
| Somax Solutions Limited | Wholesale & retail | 2019 |
| Soper Estates (South East) Ltd | Real estate | 2023 |
| Sophroneo Limited | Information & communication | 2016 |
| Sorya Consulting Ltd | Information & communication | 2018 |
| Soul Sisters Event Hire Ltd | Hospitality | 2022 |
| Soulstitch Studio Limited | Wholesale & retail | 2024 |
| Sounddrive Films Limited | Information & communication | 2023 |
| South Coast Candy Floss Ltd | Wholesale & retail | 2025 |
| South East Brickwork Limited | Construction | 2011 |
| South London Services Ltd | Households | 2019 |
| Southern Environmental Consultants Limited | Professional & scientific | 2015 |
| Southern GAS Networks PLC | Energy | 2004 |
| Southern Real Estate Hotels & Resorts Invest Limited | Construction | 2025 |
| Southlands Avenue 12/04/1963 Limited | Extraterritorial | 2013 |
| Southon House Ltd | Households | 2025 |
| Sovereign GAS Consultancies and Services Ltd | Professional & scientific | 2022 |
| Spa Time Ltd | Administrative & support | 2023 |
| Spark Models UK Limited | Manufacturing | 2020 |
| Spheredawn Limited | Professional & scientific | 1990 |
| SPI Data Solutions Ltd | Information & communication | 2019 |
| Spice Horley Boys Limited | Hospitality | 2022 |
| Spiers Farm Management Limited | Households | 2010 |
| Spinnaker Court (Management) Limited | Real estate | 2006 |
| Spitana Ltd | Manufacturing | 2020 |
| Sprint Transfers Ltd | Transport & logistics | 2019 |
| Spur Ventures Limited | Construction | 2024 |
| Squire Energy Holdings Limited | Financial services | 2018 |
| Squire Energy Limited | Construction | 2003 |
| SR Accounts Management Ltd | Professional & scientific | 2026 |
| ST Josephs Travels Ltd | Transport & logistics | 2020 |
| ST. Steve Ltd | Professional & scientific | 2015 |
| Stark Connect Limited | Administrative & support | 2010 |
| Stark Energy Services Limited | Information & communication | 2025 |
| Stark Infra-Electricity Limited | Construction | 2018 |
| Stark Infra-Gas Limited | Energy | 2018 |
| Stark Midco Limited | Information & communication | 2025 |
| Stark Software International (Holdings) Limited | Financial services | 2016 |
| Stark Software International Ltd. | Information & communication | 1994 |
| Stark Technical Services Ltd | Professional & scientific | 2013 |
| Stark Utility Funding Limited | Administrative & support | 2016 |
| STAY2GETHER CIC | Health & social care | 2025 |
| STB Cleaning Limited | Administrative & support | 2024 |
| Steadfast Home Designs Ltd | Construction | 2019 |
| Steelform (UK) Limited | Administrative & support | 2012 |
| Stellar Developments (SE) Ltd | Construction | 2023 |
| Stephanie Baxter Media Ltd | Information & communication | 2023 |
| Stephen Pendry Associates Ltd | Financial services | 2020 |
| Steppingstones Consultancy Services Limited | Professional & scientific | 2006 |
| Steven Wyer Limited | Professional & scientific | 2025 |
| Sticklebacks Communications Limited | Professional & scientific | 2002 |
| Stickwise Limited | Education | 2005 |
| Stomgrove 2014 Ltd | Financial services | 2014 |
| Stomgrove 2025 Limited | Professional & scientific | 2025 |
| Stone & Wood Designs Limited | Administrative & support | 2022 |
| Stortek Limited | Transport & logistics | 2000 |
| Storyboardrecruitment Ltd | Administrative & support | 2025 |
| Stoves Dining Limited | Hospitality | 2020 |
| Strategic Marketing & Management Limited | Professional & scientific | 2012 |
| Strategic Planning Solutions Ltd | Real estate | 2015 |
| Strawberry Event Company Limited | Hospitality | 2012 |
| Streamline Global DMC Ltd | Administrative & support | 2026 |
| Strong Girl Club Ltd | Other services | 2023 |
| Strongduck Ltd | Wholesale & retail | 2017 |
| Strongweld Limited | Manufacturing | 2015 |
| Struttle Ltd | Information & communication | 2012 |
| Stuart Croghan Limited | Information & communication | 2013 |
| Sugar Glass Productions Limited | Information & communication | 2012 |
| SUI Books Ltd | Professional & scientific | 2019 |
| Sulu Studio Ltd | Professional & scientific | 2020 |
| Sumandawil Properties Limited | Real estate | 1998 |
| Sumerwood Car Sales Ltd | Wholesale & retail | 2020 |
| Summer Adventure Camp Limited | Education | 2017 |
| Sun Farms Limited | Wholesale & retail | 2021 |
| Sunpark Holdings 2 Ltd | Financial services | 2025 |
| Sunpark Holdings Temp Ltd | Financial services | 2025 |
| Sunpatchvintage Ltd | Wholesale & retail | 2026 |
| Sunville Rail Limited | Construction | 2005 |
| Supply Run Ltd | Information & communication | 2015 |
| Sure Parking Ltd | Transport & logistics | 2011 |
| Sure Summit Solutions Limited | Professional & scientific | 2016 |
| Surrey Design & Build South East Limited | Construction | 2011 |
| Surrey Injury Clinic Limited Liability Partnership | | 2020 |
| Surrey Lawns & Gardens Limited | Administrative & support | 2019 |
| Surrey Maintenance Ltd | Construction | 2016 |
| Surrey On-Line Limited | Extraterritorial | 1997 |
| Surrey Preschools Limited | Education | 2021 |
| Surrey Primarchs Limited | Wholesale & retail | 2025 |
| Surrey Primary Care Ltd | Health & social care | 2022 |