| S W Harrison Electrical Limited | Construction | 2020 |
| S&B Transport & Logistics Limited | Transport & logistics | 2025 |
| S&C Business UK Ltd | Construction | 2018 |
| S&G Bargains Ltd | Wholesale & retail | 2026 |
| S&K Consulting Ltd | Information & communication | 2022 |
| S&M Building Services Ltd | Construction | 2022 |
| S&M Foods Limited | Hospitality | 2006 |
| S&M Foods Pizza Limited | Hospitality | 2019 |
| S&M Media Ltd | Manufacturing | 2025 |
| S&N Co Estates Ltd | Construction | 2026 |
| S&N Rentals Ltd | Real estate | 2025 |
| S&P Fi-Vim Limited | Information & communication | 2015 |
| S&S Plastering Ltd | Construction | 2019 |
| S&Sl Ltd | Wholesale & retail | 2025 |
| S&Y Global Ltd | Wholesale & retail | 2024 |
| S&Z Motors Ltd | Wholesale & retail | 2024 |
| S. Aspris & SON Limited | Wholesale & retail | 1979 |
| S. L. Hardwoods Limited | Manufacturing | 2012 |
| S. Lucia N Limited | Hospitality | 2018 |
| S.A. Mcsorley Construction Limited | Construction | 2007 |
| S.A.I Holdings Group Ltd | Financial services | 2019 |
| S.A.I Homes I Ltd | Real estate | 2020 |
| S.A.I Homes II Ltd | Real estate | 2020 |
| S.A.I Homes III (a) Ltd | Real estate | 2023 |
| S.A.I Homes III (B) Ltd | Real estate | 2023 |
| S.A.I Homes III Ltd | Real estate | 2019 |
| S.A.I Homes IV Ltd | Real estate | 2022 |
| S.A.I Homes Ltd | Real estate | 2012 |
| S.A.I Homes V Ltd | Real estate | 2022 |
| S.B. Construction (Surrey) Limited | Construction | 1988 |
| S.E. Creative Limited | Real estate | 2019 |
| S.Hadi International Ltd | Other services | 2019 |
| S.J.K. Investments Limited | Real estate | 1997 |
| S.L Fusions Limited | Hospitality | 2024 |
| S.L.E. Limited | Manufacturing | 1982 |
| S.M. Plumbing and Heating Services Ltd | Construction | 2025 |
| S.M.Tpropertyenterprises Ltd | Construction | 2025 |
| S.Quarshie Ltd. | Manufacturing | 2014 |
| S.R Convenience Limited | Wholesale & retail | 2010 |
| S.S.& Sons Ltd | Wholesale & retail | 2011 |
| S.V Roofing Service & Repair Ltd | Construction | 2021 |
| S10 Supplies Ltd | Wholesale & retail | 2010 |
| S2N Group Ltd | Wholesale & retail | 2024 |
| S2S Group Ltd | Wholesale & retail | 2011 |
| S4 Brothers Limited | Construction | 2020 |
| S4ERS Ltd | Information & communication | 2015 |
| S999 Electrical Ltd | Manufacturing | 2025 |
| S999 Sparks Ltd | Construction | 2026 |
| SA Cosmetics Group Ltd | Wholesale & retail | 2024 |
| SA Escapes Limited | Real estate | 2025 |
| SA Global Migration Limited | Administrative & support | 2026 |
| SA Habitat Limited | Real estate | 2016 |
| SA KA Fete Ruthine Ltd | Hospitality | 2021 |
| SA London Management Ltd | Real estate | 2020 |
| SA PCO Cars Ltd | Administrative & support | 2023 |
| SA Property & Investment Ltd | Real estate | 2025 |
| SA Roche Properties Ltd | Real estate | 2019 |
| SA Utilities Limited | Energy | 2018 |
| Sa&Aj Limited | Wholesale & retail | 2025 |
| Saabco Design & Build Ltd | Households | 2016 |
| Saadfragrance Ltd | Wholesale & retail | 2024 |
| Saanjh Ventures Ltd | Hospitality | 2025 |
| Saara Limited | Real estate | 2018 |
| Saasrooms Europe Ltd | Professional & scientific | 2022 |
| Saasrooms Ltd | Professional & scientific | 2022 |
| SAB Motors Ltd | Wholesale & retail | 2019 |
| Saba Convenience Stores Ltd | Wholesale & retail | 2025 |
| Sabaariah Consulting Limited | Professional & scientific | 2024 |
| Saban Morleys Limited | Hospitality | 2021 |
| Sabana Limited | Construction | 2020 |
| Sabba Platform Ltd | Information & communication | 2026 |
| Sabiti Consultancy Ltd | Information & communication | 2012 |
| Sable International Public Interest Ltd | Professional & scientific | 2022 |
| Sabnaz Limited | Wholesale & retail | 2026 |
| Sabor Dominicano UK Ltd | Hospitality | 2022 |
| Sabores DE Portugal Ltd | Wholesale & retail | 2025 |
| Sachwini Limited | Information & communication | 2018 |
| Sackville Place Management Limited | Households | 1999 |
| Sacs Construction Ltd | Construction | 2025 |
| Sadhra Convenience Store Limited | Wholesale & retail | 2013 |
| Sadhra Retailers Limited | Wholesale & retail | 2019 |
| Sadigoods Limited | Wholesale & retail | 2025 |
| Sadiq Holdings Ltd | Financial services | 2025 |
| Sadler's Court (Preston) Management Company Limited | Households | 2024 |
| Sadurski Security Ltd | Administrative & support | 2018 |
| Saeb Properties Ltd | Real estate | 2021 |
| Saema Cleaning Company Ltd | Administrative & support | 2017 |
| SAF Recruitment London Ltd | Administrative & support | 2025 |
| Safa-Events Limited | Education | 2025 |
| Safe & Secure Electrical Limited | Construction | 2014 |
| Safe Care Ltd | Health & social care | 2023 |
| Safe Covenant Limited | Professional & scientific | 2024 |
| Safe Haven Living & Property Management Ltd | Real estate | 2026 |
| Safe OZO Heating & Cooling Limited | Construction | 2023 |
| Safeguards CFV Ltd | Administrative & support | 2019 |
| Safehome Property Maintenance Ltd | Construction | 2025 |
| Safety First Dual Controls Ltd | Manufacturing | 2009 |
| Safety IS the Key Ltd | Professional & scientific | 2012 |
| Safeway Homes and Consult Limited | Real estate | 2022 |
| Saffarini Holdings Ltd | Real estate | 2026 |