| Star Voyager Limited | Other services | 2018 |
| Starbuild Renovations Ltd | Construction | 2025 |
| Starinfosec Limited | Information & communication | 2025 |
| Starlight Constructions Ltd | Construction | 2018 |
| Starseven Ltd | Information & communication | 2014 |
| Station Taxi Hook Limited | Transport & logistics | 2014 |
| Steam Core Ltd | Administrative & support | 2026 |
| STEF1997 Ltd | Transport & logistics | 2025 |
| Steli 2007 Ltd | Transport & logistics | 2019 |
| Stellabeautyacademy Limited | Other services | 2024 |
| Stelvex Ltd | Manufacturing | 2025 |
| Stepney Way Properties Limited | Construction | 2016 |
| Sterling Avenues LLP | | 2023 |
| Sterling Global Trading Limited | Wholesale & retail | 2026 |
| Sterlings Residence Ltd | Health & social care | 2025 |
| Stewdios Ltd | Construction | 2019 |
| Stil Property Ltd | Real estate | 2020 |
| Stilo Decorating & Property Maintenance Ltd | Construction | 2024 |
| Stix Hospitality Ltd | Hospitality | 2026 |
| STO Express (UK) Ltd | Wholesale & retail | 2014 |
| Stoneworx Software Solutions Limited | Information & communication | 2022 |
| STOPANDSHOP1 Limited | Other services | 2025 |
| Store by Ismail Ltd | Wholesale & retail | 2025 |
| Strategic Material Resources Ltd | Professional & scientific | 2022 |
| Strategic Mediahub Ltd | Administrative & support | 2023 |
| Stratton Highways Ltd | Construction | 2023 |
| Strong Tower Associates Limited | Real estate | 2009 |
| Study Abroad Consultancy Limited | Education | 2023 |
| Stxsecurity Ltd | Administrative & support | 2018 |
| Subtle Being Holdings Ltd | Financial services | 2025 |
| Subtle Being Natural Wellness Ltd | Administrative & support | 2025 |
| Success Point Limited | Education | 2014 |
| Sudanese House in Hounslow and Surroundings CIC | Education | 2026 |
| Sudesh Travels Ltd | Administrative & support | 2025 |
| Sugansa Solutions Limited | Information & communication | 2014 |
| Sujan Empire Ltd | Wholesale & retail | 2025 |
| Sujupets Limited | Wholesale & retail | 2022 |
| Sukh Development Ltd | Construction | 2025 |
| Sukhmani Transport Services Ltd | Transport & logistics | 2022 |
| Sumiran Limited | Professional & scientific | 2019 |
| Summitt Solutions Limited | Extraterritorial | 2011 |
| Sun Enterprise Trading Ltd | Wholesale & retail | 2023 |
| Sunbury DEV Co Limited | Real estate | 2022 |
| Suni Technologies Limited | Information & communication | 2008 |
| Sunny Hotels Ltd | Hospitality | 2025 |
| Sunrise Tours &Travels Limited | Administrative & support | 2026 |
| Sunrise Trading Inc Limited | Wholesale & retail | 2023 |
| Sunrisers Cape Transport Limited | Transport & logistics | 2023 |
| Sunshine Roofing Ltd | Construction | 2025 |
| Sunvij Infra Ltd | Real estate | 2024 |
| Sunvij IT Solutions Ltd | Information & communication | 2021 |
| Super Health Sprays Ltd | Extraterritorial | 2013 |
| Super Monkey Limited | Wholesale & retail | 2016 |
| Super Singh's Limited | Hospitality | 2013 |
| Superdrive London Ltd | Education | 2022 |
| Superior Paving London Ltd | Administrative & support | 2025 |
| Supertouring Express Transport Ltd | Transport & logistics | 2025 |
| Supplior Ltd | Wholesale & retail | 2025 |
| Supreme Facade Vision Ltd | Construction | 2024 |
| Supreme Support Services Limited | Construction | 2024 |
| Surgical Services Ltd | Health & social care | 2020 |
| Surrey Plant Ladies LLP | | 2024 |
| Sushi Everest Ltd | Hospitality | 2022 |
| Sushi Manga Ltd | Hospitality | 2020 |
| Sutton Food Plus Ltd | Wholesale & retail | 2013 |
| Suubi Academy Ltd | Information & communication | 2016 |
| Svltech Ltd | Other services | 2022 |
| SVS Transport 2020 Ltd | Transport & logistics | 2026 |
| SWA Stays Ltd | Hospitality | 2026 |
| Swaad Rasoi Ltd | Hospitality | 2025 |
| Swadeshi Foods UK Ltd | Wholesale & retail | 2024 |
| Swan Investments Feltham Ltd | Real estate | 2023 |
| Swan Transporters Ltd | Transport & logistics | 2019 |
| Swani Ltd | Professional & scientific | 2019 |
| Swap Studio Ltd | Wholesale & retail | 2024 |
| Swara Asset Oak Limited | Real estate | 2026 |
| Swara Global Investments Limited | Real estate | 2023 |
| Swaraj Analytics Ltd | Information & communication | 2018 |
| Swarup Sparsha Ltd | Real estate | 2024 |
| Swas Services Ltd | Information & communication | 2024 |
| Swatantra Technologies Ltd | Information & communication | 2019 |
| Swift SIM Constructions Ltd | Construction | 2014 |
| Swiss Signature Ltd | Wholesale & retail | 2020 |
| Swisshare Limited | Wholesale & retail | 2023 |
| Switch Lanez Ltd | Wholesale & retail | 2026 |
| SXN Motors Ltd | Wholesale & retail | 2020 |
| Sydney House Development Limited | Real estate | 2025 |
| Syed JAH Ltd | Manufacturing | 2023 |
| Syed’S Driving School Limited | Education | 2024 |
| SYI Syangbo Ltd | Real estate | 2026 |
| Syida Ltd | Health & social care | 2014 |
| Syntech Developments Limited | Construction | 2024 |
| SZ Property Investments Ltd | Real estate | 2020 |
| T & K Tax Services Ltd | Professional & scientific | 2014 |
| T Edwards Accountants Ltd | Professional & scientific | 2018 |
| T L Trifan Limited | Construction | 2011 |
| T&D Trans Ltd | Transport & logistics | 2024 |
| T&T Domestic Cleaning Services Ltd | Administrative & support | 2024 |
| T-Line Transport & Logistics Ltd | Transport & logistics | 2018 |
| T.D Building Contractors Ltd | Construction | 2020 |