| Sasmaz Kebab Limited | Hospitality | 2021 |
| Savage Vehicle Rebuilds Ltd | Wholesale & retail | 2024 |
| Savannah Consulting Limited | Information & communication | 2023 |
| Saved by Grace Ventures Limited | Other services | 2025 |
| Savh Ltd | Wholesale & retail | 2009 |
| Savundra Property Ltd | Real estate | 2021 |
| Saythanks Ltd | Information & communication | 2016 |
| Sbatool Ltd | Health & social care | 2023 |
| SBM Carpentry Limited | Construction | 2014 |
| SBS Aesthetics Ltd | Other services | 2024 |
| SCA Property Holdings Limited | Real estate | 2016 |
| Scala Financial Consultancy Ltd | Professional & scientific | 2021 |
| Scalex Digital Limited | Information & communication | 2026 |
| Scalr Group Ltd | Professional & scientific | 2026 |
| Sceneuk Ltd | Arts & recreation | 2021 |
| School of Kung FU (Croydon) LLP | | 2019 |
| School of Kung FU Limited | Arts & recreation | 2019 |
| Scolly Locks Ltd | Other services | 2020 |
| Scooby Subs Ltd | Hospitality | 2025 |
| Scotec International Limited | Professional & scientific | 1994 |
| Screentrade Media Ltd | Information & communication | 2002 |
| Scripture Scribbles Ltd | Wholesale & retail | 2026 |
| Scuffs Away Smart Repairs Ltd | Wholesale & retail | 2014 |
| SD Heath Solutions Limited | Transport & logistics | 2018 |
| SDH Construction Limited | Construction | 2025 |
| SDM Tadworth Ltd | Hospitality | 2026 |
| SDT Healthcare Solution Ltd | Health & social care | 2023 |
| SDY Care Ltd | Health & social care | 2021 |
| Seamec UK Investments Limited | Financial services | 2023 |
| Season Rise Global Services Ltd | Other services | 2021 |
| Seccom Ltd | Information & communication | 2010 |
| Second Silicon Ltd | Wholesale & retail | 2026 |
| Secondo Limited | Real estate | 2021 |
| Secure Safety Limited | Administrative & support | 2020 |
| Security DM 64 Limited | Administrative & support | 2019 |
| Sehertepe Limited | Hospitality | 2019 |
| Selsdon ALL in One UK Ltd | Wholesale & retail | 2025 |
| Selsdon Building Company Limited | Construction | 2017 |
| Selsdon Building Contractors Limited | Construction | 2010 |
| Selsdon Enterprises Ltd | Hospitality | 2024 |
| Selsdon Group Limited | Financial services | 2020 |
| Selsdon Healthcare Limited | Wholesale & retail | 2001 |
| Selsdon Investments Limited | Construction | 2022 |
| Selsdon London & South East Limited | Construction | 2025 |
| Selsdon Nail Salon Ltd | Other services | 2026 |
| Selsdon Property Management Ltd. | Construction | 2004 |
| Selsdon Residential Consortium Limited | Households | 2026 |
| Selsdon Road Freehold Limited | Real estate | 2021 |
| Selsdon Spice Limited | Hospitality | 2017 |
| Selsdon Tennis Club,Limited(The) | Arts & recreation | 1948 |
| Sena Hampshire Limited | Hospitality | 2015 |
| Senaj Construction Ltd | Construction | 2023 |
| Senol Holdings Ltd | Real estate | 2020 |
| Sensasian Banqueting Limited | Hospitality | 2016 |
| Sensasian Lounge Limited | Hospitality | 2016 |
| Sequoia Landscapes & Gardens Ltd | Administrative & support | 2011 |
| Sertyway Limited | Information & communication | 2024 |
| Service to Lawns Ltd | Administrative & support | 2019 |
| Servire Ltd | Wholesale & retail | 2023 |
| Setec Security Ltd | Administrative & support | 2016 |
| Settrus Ltd | Information & communication | 2026 |
| Seval Yilmaz Fastfood Limited | Hospitality | 2023 |
| Seventeen Eighty Ltd | Information & communication | 2019 |
| Sevim Catering Limited | Hospitality | 2019 |
| SGI Solutions II Limited | Professional & scientific | 2015 |
| Shaa Group Ltd | Wholesale & retail | 2026 |
| Shador Studio London Ltd | Education | 2023 |
| Shadow Security Solutions Limited | Administrative & support | 2011 |
| Shajareo Ltd | Wholesale & retail | 2020 |
| Shakes Properties Ltd | Real estate | 2025 |
| Shapeup Contractors Limited | Construction | 2019 |
| Sharif & Sharif Investments Limited | Real estate | 2025 |
| Sharvi Tech Limited | Information & communication | 2018 |
| Sharvin Investments Ltd | Real estate | 2022 |
| Shatadav Ltd | Real estate | 2023 |
| Shaw 360 Ltd | Professional & scientific | 2020 |
| Shaw Lifestyle Limited | Arts & recreation | 2025 |
| Shawood Properties Limited | Real estate | 2021 |
| SHE Plasters Ltd | Administrative & support | 2024 |
| She's SO Pretty Ltd | Wholesale & retail | 2015 |
| Shekinah Consultants Limited | Professional & scientific | 2011 |
| Shelley Incorporated Limited | Professional & scientific | 2005 |
| Shelsons Ltd | Professional & scientific | 2013 |
| Sheng CAI BAO Ltd | Hospitality | 2018 |
| Sheridan Tongue Limited | Extraterritorial | 2019 |
| Sherwood Fast Food Ltd | Hospitality | 2018 |
| Sherwood Preschool Limited | Education | 2014 |
| She’S Safe Transport CIC | Transport & logistics | 2026 |
| Shilton Healthcare Services Limited | Health & social care | 2024 |
| Shinda Ltd | Real estate | 2014 |
| Shinfield Services Limited | Information & communication | 1995 |
| Shining Starts Limited | Health & social care | 2025 |
| Shiva Assets Limited | Real estate | 2026 |
| Shiven Homes Limited | Real estate | 2017 |
| Shivpayal Associates Ltd | Real estate | 2012 |
| Shomade Limited | Real estate | 2019 |
| Shop Orbit Ltd | Wholesale & retail | 2025 |
| Shop-Easy Ltd | Wholesale & retail | 2023 |
| Shoppereville Ltd | Wholesale & retail | 2021 |
| Shower Link Ltd | Wholesale & retail | 2024 |