| SSJ Accountants Limited | Professional & scientific | 2008 |
| SSL Limited | Extraterritorial | 2015 |
| Ssmc Group Co., Ltd | Extraterritorial | 2016 |
| SSR Marine Engineering Co., Ltd | Manufacturing | 2023 |
| Sstnm Ltd | Manufacturing | 2024 |
| Ssvg Velbert Intelligent Technolog (GB) Limited | Extraterritorial | 2020 |
| SSY Worldwide Limited | Extraterritorial | 2012 |
| SSZ Global Private Limited | Professional & scientific | 2020 |
| ST Billy Import and Export Co., Ltd | Wholesale & retail | 2024 |
| ST James's Pre-School Limited | Education | 2005 |
| ST Mary's Catholic Primary School | Education | 2014 |
| ST. Augustines Court Management Limited | Households | 1989 |
| ST. Brides House RTM Company Limited | Extraterritorial | 2024 |
| ST. Paul International Ltd | Wholesale & retail | 2021 |
| Stabileum Limited | Other services | 2024 |
| Stackwave Project Ltd | Other services | 2023 |
| Stage One Scaffolding Limited | Construction | 2024 |
| Stamford (UK) Motor Co., Limited | Manufacturing | 2026 |
| Standard Investment Group Ltd | Financial services | 2005 |
| Standform Ltd. | Transport & logistics | 2025 |
| Standing Order Ltd | Hospitality | 2024 |
| Stanhope Construction Ltd | Other services | 2013 |
| Star Elements Ltd | Information & communication | 2022 |
| Star Ocean Int'L Consultancy (UK) Ltd | Professional & scientific | 2015 |
| Star Welding Ltd | Information & communication | 2019 |
| Star-Master Investments Proprietary Limited | Wholesale & retail | 2021 |
| Stark International Trade Co., Ltd | Extraterritorial | 2021 |
| Starkeys Lane Limited | Arts & recreation | 2008 |
| Staroon Textile Co. Limited | Extraterritorial | 2009 |
| Starry Sky Container Ltd | Transport & logistics | 2023 |
| Stars Holding Group Ltd | Extraterritorial | 2018 |
| Stars Park Entertainment Limited | Extraterritorial | 2015 |
| Startfield Property Management Limited | Households | 1999 |
| Stays Hub Ltd | Real estate | 2021 |
| Stcs Group Ltd | Extraterritorial | 2016 |
| Stebar Interiors Limited | Construction | 1998 |
| Steelforce Industrial Co., Ltd. | Manufacturing | 2019 |
| Stellaris Limited | Financial services | 2024 |
| Stellarmed Co., Ltd | Extraterritorial | 2019 |
| Stems Wilder Ltd | Other services | 2021 |
| Stenford Property Ltd | Real estate | 2014 |
| Stephen REW Designs Limited | Arts & recreation | 2015 |
| Stepping Stones Therapy Services Ltd | Health & social care | 2016 |
| Steve Days Plumbing and Heating Limited | Construction | 2012 |
| Stevoor Environmental Protection Industry Ltd | Extraterritorial | 2015 |
| Stewart Blackman Holdings Ltd | Real estate | 2020 |
| STF Marine Service Company Limited | Extraterritorial | 2020 |
| Stigma Industry Limited | Extraterritorial | 2023 |
| Stillwo Industrial Joint Limited | Extraterritorial | 2021 |
| STM Innovational MFG Ltd | Extraterritorial | 2015 |
| Stockerhouse Consulting Limited | Professional & scientific | 2018 |
| Stone Beauty Int'L Trade Ltd | Extraterritorial | 2021 |
| Stone Creek Global Limited | Financial services | 2022 |
| Stone International Trading Ltd | Wholesale & retail | 2020 |
| Stonehaven CD Limited | Real estate | 2017 |
| Stonehaven GH Limited | Hospitality | 2020 |
| Storagestudent Limited | Transport & logistics | 2022 |
| Stosolutions Ltd | Professional & scientific | 2022 |
| Strawberry Hill Capital Limited | Real estate | 2019 |
| Stream Technology Development Ltd | Information & communication | 2022 |
| Stride International Co., Limited | Professional & scientific | 2007 |
| Strings Ltd | Wholesale & retail | 2025 |
| Striver Trading Limited | Wholesale & retail | 2023 |
| Strokethelabrador Ltd | Real estate | 2025 |
| Strong Pass Trade Ltd | Wholesale & retail | 2024 |
| Strong Treasure China Limited | Extraterritorial | 2014 |
| Strongdri Limited | Agriculture & fishing | 1977 |
| Sttek Limited | Extraterritorial | 2011 |
| Stti Services UK Limited | Professional & scientific | 2020 |
| Studii Australia Study Abroad Limited | Education | 2025 |
| Studio 76 Nails & Beauty Ltd | Other services | 2023 |
| Studio Amber Ltd | Arts & recreation | 2025 |
| Studio Moon Yoga and Pilates Limited | Arts & recreation | 2023 |
| Studio Sunny Ltd | Professional & scientific | 2026 |
| Studio Tamago Limited | Professional & scientific | 2018 |
| Studio-Ia Ltd | Professional & scientific | 2016 |
| STUDIO42 Developments Ltd | Real estate | 2023 |
| STUDIOFOURTY4 Ltd | Wholesale & retail | 2018 |
| Stumpinv Ltd | Real estate | 2019 |
| Stupoint Limited | Information & communication | 2009 |
| STY Auto Parts Co., Ltd | Manufacturing | 2024 |
| Stylegrid Ltd | Extraterritorial | 2022 |
| Styles Homes Limited | Real estate | 2000 |
| Styling Ltd | Information & communication | 2015 |
| Stylish Glass Rooms Ltd | Construction | 2014 |
| SUB Divo Ltd | Professional & scientific | 2026 |
| Subashri Ltd | Real estate | 2017 |
| Sublime Talent Management Limited | Professional & scientific | 2015 |
| Suborbit Ltd | Information & communication | 2008 |
| Succeed Gold International Ltd | Extraterritorial | 2021 |
| Success IT Ltd | Information & communication | 2011 |
| Sudais E-Commerce Ltd | Wholesale & retail | 2025 |
| Suddenly Single Ltd | Information & communication | 2015 |
| Sudoo Trading Ltd | Manufacturing | 2020 |
| SUE Brookman Independent Social Work Services Limited | Health & social care | 2014 |
| Sufar Co., Ltd | Manufacturing | 2023 |
| Sugargoo Co., Limited | Wholesale & retail | 2023 |
| Sugon Electronic Co., Ltd | Extraterritorial | 2021 |
| Suichang Union Industry & Trade Co., Ltd | Manufacturing | 2024 |
| Suihua Fashion Limited | Wholesale & retail | 2023 |