| SRC College Ltd | Education | 2026 |
| SRC Commercial Ltd | Real estate | 2021 |
| SRD Global Solutions Ltd | Information & communication | 2019 |
| Srdk Consultancy Ltd | Health & social care | 2013 |
| Sree Matreya Limited | Wholesale & retail | 2020 |
| Srem Care Giver Limited | Health & social care | 2023 |
| SRI CONSTRUCTIONS24 Ltd | Households | 2022 |
| SRI Kanth Properties Ltd | Real estate | 2021 |
| SRI Murugan Retails UK Ltd | Wholesale & retail | 2025 |
| SRI SAI Couriers Ltd | Transport & logistics | 2014 |
| SRI Shayi Ltd | Hospitality | 2018 |
| SRI Sita Rama Consultancy Limited | Professional & scientific | 2019 |
| Sriaduavi Limited | Professional & scientific | 2019 |
| Srica Limited | Financial services | 2014 |
| Srinath Properties Limited | Real estate | 2020 |
| Srinavashakthi Ltd | Wholesale & retail | 2026 |
| Srinaya Ltd | Wholesale & retail | 2024 |
| Srinilaya Seva Samiti Limited | Wholesale & retail | 2019 |
| Sristy Ltd | Information & communication | 2020 |
| Sristy Properties Limited | Real estate | 2021 |
| SRJ Care Home Limited | Health & social care | 2016 |
| SRK International Food and Wine Ltd | Wholesale & retail | 2026 |
| Srnd Creative Limited | Arts & recreation | 2025 |
| SRS Capital Limited | Real estate | 2026 |
| Srsk Ltd | Hospitality | 2024 |
| SRV UK Consultancy Ltd | Professional & scientific | 2023 |
| Srvp Ltd | Administrative & support | 2025 |
| SS Brothers Retail Ltd | Wholesale & retail | 2018 |
| SS ENT Limited | Education | 2016 |
| SS Wellington Ltd | Wholesale & retail | 2020 |
| SS. Trinity Limited | Financial services | 2016 |
| Ssixthh Ltd | Real estate | 2015 |
| SSJ Reliance Property Ltd | Real estate | 2026 |
| Sskp Healthcare Limited | Health & social care | 2019 |
| Ssquare Capital Limited | Real estate | 2020 |
| SSR Systems Engineering Ltd | Professional & scientific | 2023 |
| Sssnp IT Limited | Information & communication | 2014 |
| SST Concierge Limited | Professional & scientific | 2025 |
| Ssvp Ltd | Hospitality | 2024 |
| Sszaa Ltd | Other services | 2014 |
| ST Anthony Property Developments Ltd | Construction | 2025 |
| ST Caleb London Ltd | Health & social care | 2018 |
| ST Georges Property Services (London) Ltd | Real estate | 2007 |
| ST UK Holdings Limited | Administrative & support | 2015 |
| ST. Ann's Investments Limited | Real estate | 2014 |
| ST. George's Day Events. | Other services | 2003 |
| Stablesupply Ltd | Wholesale & retail | 2025 |
| Stacka Ventures Limited | Information & communication | 2026 |
| Stackguard Cloud Security Ltd | Information & communication | 2026 |
| Stadium Centre Management Limited | Real estate | 2005 |
| Stadium Sports Bar Wembley Limited | Hospitality | 2022 |
| Stage 24 Services Ltd | Construction | 2026 |
| Stakeholders Business Ltd | Financial services | 2024 |
| Stallion Gems Ltd | Wholesale & retail | 2022 |
| Stallion Health UK Ltd | Wholesale & retail | 2023 |
| Stallion Investments and Tradings Ltd | Wholesale & retail | 2022 |
| Standard Rent a Car Ltd | Administrative & support | 2019 |
| Standardco UK Ltd | Wholesale & retail | 2018 |
| Stanley Dosa Ltd | Hospitality | 2023 |
| Star 2 Barber Shop Limited | Other services | 2024 |
| Star Beauty Ltd | Wholesale & retail | 2016 |
| Star BXT Ltd | Arts & recreation | 2024 |
| Star Construct Ltd | Construction | 2019 |
| Star Investors Limited | Other services | 2015 |
| Star Island Estates Limited | Real estate | 2023 |
| Star Island Holdings Limited | Real estate | 2023 |
| Star Same Day Couriers Limited | Transport & logistics | 2017 |
| Star Struck Films & Events Ltd | Professional & scientific | 2006 |
| Starlight Linen Ltd | Other services | 2024 |
| Starling Leisures Ltd | Hospitality | 2019 |
| Starling Shop Fitout Ltd | Wholesale & retail | 2020 |
| Starlink Logistics Ltd | Wholesale & retail | 2024 |
| Starlink Trading Ltd | Wholesale & retail | 2025 |
| Staroffice Solutions Limited | Information & communication | 2012 |
| Starplus Limited | Wholesale & retail | 2016 |
| Starpost Limited | Wholesale & retail | 2005 |
| Stars Salon Ltd | Other services | 2011 |
| Statasphere Ltd | Information & communication | 2025 |
| Stay Hello Ltd | Real estate | 2022 |
| Stay Loyal Properties Ltd | Real estate | 2024 |
| Steam and Spice Ltd | Hospitality | 2026 |
| Steel Metal Solutions Ltd | Construction | 2022 |
| Steff Properties Ltd | Real estate | 2026 |
| Stem Living Limited | Real estate | 2021 |
| Stemano Ltd | Wholesale & retail | 2020 |
| Stenton & Partners | | 1992 |
| Step to London Education Ltd | Education | 2025 |
| Step UP Tutors Ltd | Education | 2018 |
| Step Ventures Limited | Professional & scientific | 2023 |
| Sterling Heights Group Limited | Real estate | 2025 |
| Sterling Labour Solutions Ltd | Administrative & support | 2026 |
| Sterling Luxe Global Limited | Wholesale & retail | 2025 |
| Sterling One Ltd | Real estate | 2019 |
| Sterling Properties (UK) Ltd | Real estate | 1998 |
| Sterling System Integration Ltd | Manufacturing | 2026 |
| Sterrn Inter Limited | Construction | 2022 |
| Steve's Stoves Limited | Construction | 2022 |
| Stileinka Limited | Wholesale & retail | 2025 |
| STM Collective Ltd | Real estate | 2026 |
| Stock Brick London Ltd | Real estate | 2024 |