| S Walker GAS Services Limited | Construction | 2012 |
| S&B Business Transformation Limited | Administrative & support | 2024 |
| S&B Freight Limited | Transport & logistics | 2025 |
| S&D Food & Wine Ltd | Wholesale & retail | 2022 |
| S&E Property Management Ltd | Real estate | 2020 |
| S&F Properties Investment Ltd | Real estate | 2024 |
| S&G Trading Limited | Wholesale & retail | 2007 |
| S&L Estate Agency Ltd | Real estate | 2022 |
| S&L IT PVT Ltd | Information & communication | 2016 |
| S&L Pressure Washing Services Ltd | Administrative & support | 2019 |
| S&M Joinery Ltd | Manufacturing | 2023 |
| S&P Autos (Milton Keynes) Limited | Wholesale & retail | 2012 |
| S&P Gold Trade Limited | Wholesale & retail | 2025 |
| S&P Healthcare Ltd | Health & social care | 2025 |
| S&R Heritage FIC Ltd | Real estate | 2026 |
| S&R Heritage LLP | | 2023 |
| S&R Security Limited | Administrative & support | 2018 |
| S&R Smart Properties Ltd | Real estate | 2024 |
| S&S Trading Group Ltd | Wholesale & retail | 2019 |
| S&S Transit Ltd | Transport & logistics | 2023 |
| S' Love Hair Ltd | Other services | 2020 |
| S-Q Medical Services Limited | Health & social care | 2011 |
| S-Range Limited | Wholesale & retail | 2013 |
| S.Baldwin Electrical Limited | Energy | 2008 |
| S.C. Farley Electrical Limited | Construction | 1998 |
| S.E.Ali Limited | Information & communication | 2023 |
| S.Fludgate Painting & Decorating Ltd | Construction | 2024 |
| S.G. Smith (Motors) Beckenham Limited | Wholesale & retail | 1960 |
| S.G. Smith (Motors) Crown Point Limited | Wholesale & retail | 1957 |
| S.G. Smith (Motors) Croydon Limited | Extraterritorial | 1941 |
| S.G. Smith (Motors) Limited | Extraterritorial | 1934 |
| S.G. Smith Automotive Limited | Professional & scientific | 1959 |
| S.G. Willis & Sons Limited | Wholesale & retail | 1966 |
| S.G.Smith (Motors) Sydenham Limited | Extraterritorial | 1960 |
| S.G.Smith(Motors)Forest Hill Limited | Wholesale & retail | 1957 |
| S.J.D. Associates Limited | Construction | 1996 |
| S.J.W. Maintenance Limited | Construction | 2002 |
| S.L DOC Ltd | Health & social care | 2025 |
| S.L. (Manufacturing) Limited | Manufacturing | 2002 |
| S.P Soni Traders Ltd | Wholesale & retail | 2020 |
| S.R. Groundworks Limited | Construction | 2017 |
| S.R.B.E. Holdings Limited | Extraterritorial | 2013 |
| S.R.B.E. Limited | Administrative & support | 1992 |
| S.R.U. Logistics Ltd | Transport & logistics | 2024 |
| S.S Media Production Ltd | Information & communication | 2020 |
| S.S UK Media Ltd | Information & communication | 2023 |
| S.S. White Technologies UK Limited | Manufacturing | 2009 |
| S.T. Care Limited | Health & social care | 2025 |
| S.T. Medicare Ltd | Health & social care | 2025 |
| S.V.A. Interiors Limited | Manufacturing | 2024 |
| S1DE Hustle Ltd | Professional & scientific | 2024 |
| S2D Leaflets Ltd | Information & communication | 2012 |
| S2E Project Ltd | Information & communication | 2023 |
| S2MP Ltd | Wholesale & retail | 2022 |
| S2S Taxi Limited | Transport & logistics | 2024 |
| S2VT Investments Limited | Real estate | 2021 |
| S3C Goods Ltd | Real estate | 2020 |
| S3K Developers UK Limited | Information & communication | 2017 |
| S4 Associates Limited | Professional & scientific | 2007 |
| S4 Synergy Limited | Hospitality | 2025 |
| S5 Developments Ltd | Real estate | 2026 |
| S50 Consulting Limited | Information & communication | 2011 |
| S8CREATIVE Ltd | Information & communication | 2017 |
| SA & MAT Ltd | Construction | 2018 |
| SA Mini Store Limited | Wholesale & retail | 2022 |
| SA Tax Accountants Ltd | Professional & scientific | 2020 |
| SA21 Solutions Ltd | Information & communication | 2019 |
| SA2Z Properties Limited | Real estate | 2025 |
| SA2Z Services Limited | Professional & scientific | 2015 |
| Saad Private Ltd | Professional & scientific | 2026 |
| Saak Dynamics Ltd | Hospitality | 2024 |
| Saam Technologies Limited | Extraterritorial | 2022 |
| Saama Ltd | Health & social care | 2016 |
| Saamiinnotech Ltd | Administrative & support | 2024 |
| Saan Property Ltd | Real estate | 2023 |
| Saaru Investments Limited | Real estate | 2020 |
| Saas Scale Limited | Information & communication | 2024 |
| Saasha Ltd | Hospitality | 2019 |
| Saavee Tech Consulting Limited | Information & communication | 2026 |
| Sabai Massage Ltd | Other services | 2021 |
| Sabbath Cycles Ltd | Wholesale & retail | 2022 |
| Sabeeh Mini Market Holdiings Ltd | Administrative & support | 2023 |
| Sabeeh Mini Market Ltd | Wholesale & retail | 2017 |
| Sabeeh Properties Ltd | Real estate | 2023 |
| Sabi Software Ltd | Information & communication | 2017 |
| Sabir Ventures Ltd | Financial services | 2026 |
| Sabtina Limited | Real estate | 1984 |
| SAC Investments Limited | Real estate | 2005 |
| Sacco Engineering Services Limited | Professional & scientific | 2016 |
| Sackmans Limited | Professional & scientific | 2011 |
| Sacred Ethereal Aromatherapy Limited | Manufacturing | 2022 |
| Sacred Text Limited | Information & communication | 2006 |
| Sacs Rail Ltd | Construction | 2023 |
| Sadaat Properties Limited | Real estate | 2023 |
| Sadak Enterprises Ltd | Wholesale & retail | 2024 |
| Sadak Investments Limited | Real estate | 2024 |
| Sadborow Farms Limited | Agriculture & fishing | 2003 |
| Sadditech Ltd | Information & communication | 2019 |
| Sade Care Limited | Health & social care | 2016 |
| Sadedi Traders Limited | Wholesale & retail | 2023 |