| S Bradshaw Enterprise Ltd | Financial services | 2022 |
| S Design Building UK Ltd | Construction | 2019 |
| S H Properties Limited | Real estate | 1998 |
| S K Fitness & Personal Training Ltd | Other services | 2024 |
| S Kalci Construction Ltd | Construction | 2024 |
| S N & a Consulting Ltd | Professional & scientific | 2023 |
| S N (PVT) Ltd | Wholesale & retail | 2013 |
| S P Maintenance & SON Ltd | Construction | 2014 |
| S T Restaurant Limited | Hospitality | 2025 |
| S&G Finance Solutions Ltd | Professional & scientific | 2017 |
| S&G Stainless Steel and Glass Ltd | Manufacturing | 2016 |
| S&H Integrated Limited | Professional & scientific | 2015 |
| S&K Cooperation Limited | Administrative & support | 2021 |
| S&K Corporation Limited | Administrative & support | 2024 |
| S&K Enforcement Solutions Limited | Public administration | 2024 |
| S&K Essentials Limited | Wholesale & retail | 2026 |
| S&K Prop Limited | Administrative & support | 2017 |
| S&K Property Solutions Ltd | Real estate | 2023 |
| S&N Kale Ltd | Wholesale & retail | 2015 |
| S&P Metal Works Ltd | Construction | 2026 |
| S&Q Fresh Fish & Seafood Limited | Wholesale & retail | 2021 |
| S&R Autoservices Ltd | Wholesale & retail | 2018 |
| S&S Film & TV Services Ltd | Administrative & support | 2014 |
| S&S Nails Limited | Other services | 2019 |
| S&S Prime Limited | Wholesale & retail | 2025 |
| S. Albert Electrical Contractor Limited | Energy | 2007 |
| S. Clements (Shop Fitters)Limited | Construction | 1964 |
| S. Golfa Limited | Other services | 2019 |
| S.Amaru. Ltd | Financial services | 2023 |
| S.H.O.U.L.D Ltd | Professional & scientific | 2025 |
| S.O.S Handyman & General Services Ltd | Construction | 2025 |
| S.R the Begin Ltd | Transport & logistics | 2022 |
| S.U Electrical Limited | Construction | 2023 |
| S1 & P Tyres Ltd | Wholesale & retail | 2014 |
| SA Groundworks Limited | Construction | 2018 |
| SA Nails & Beauty Limited | Other services | 2022 |
| SA Roebuck Limited | Professional & scientific | 2007 |
| Saajw Ltd | Real estate | 2026 |
| Saalt Agency Limited | Professional & scientific | 2020 |
| Saam Construction Ltd | Construction | 2019 |
| Saam London Ltd | Health & social care | 2021 |
| Saan Financial Solutions Limited | Financial services | 2023 |
| Saat Properties Limited | Real estate | 2022 |
| Saathi Restaurant Limited | Hospitality | 2010 |
| SAB Global Services Ltd | Transport & logistics | 2019 |
| Saba 25 Ltd | Wholesale & retail | 2025 |
| Sababa Care Ltd | Health & social care | 2025 |
| Sacha Hair Limited | Other services | 2024 |
| Sadaqah Atelier Ltd | Wholesale & retail | 2026 |
| Sadik Oglu Ltd | Hospitality | 2019 |
| Sadlers House Management Limited | Households | 1971 |
| Saeed & Saeed Limited | Real estate | 2020 |
| Saf-Et Ltd | Wholesale & retail | 2016 |
| Safar Services Ltd | Information & communication | 2018 |
| Safe Care Services Ltd | Public administration | 2019 |
| Safe Cert Group Ltd | Households | 2026 |
| Safe Inspection Ltd | Administrative & support | 2019 |
| Safe Properties Limited | Real estate | 2003 |
| Safecore Heating Ltd | Construction | 2026 |
| Safeguarding & Education Group Ltd | Education | 2026 |
| Safety Equipment London Limited | Wholesale & retail | 2025 |
| Safety Logic Limited | Public administration | 2019 |
| Safeway Transport Ltd | Transport & logistics | 2026 |
| Saffron Life Homes Ltd | Real estate | 2021 |
| Sage Studio Ltd | Professional & scientific | 2018 |
| Sagondal Ltd | Wholesale & retail | 2026 |
| Saha Health Ltd | Health & social care | 2023 |
| Sahan Group Ltd | Construction | 2022 |
| Saheje Limited | Information & communication | 2013 |
| Saheldent Ltd | Health & social care | 2025 |
| Sahin Construction Ltd | Construction | 2013 |
| Sahin Group Ltd | Wholesale & retail | 2020 |
| Sahin Holding Ltd | Financial services | 2025 |
| Sahin Investments Ltd | Real estate | 2020 |
| Sahin Properties Limited | Real estate | 2020 |
| Sahinler Barber Ltd | Other services | 2021 |
| Sahmaran Ltd | Wholesale & retail | 2019 |
| Sahtiss Care Ltd | Administrative & support | 2017 |
| Saint ABE Care Services Limited | Health & social care | 2022 |
| Saint Post Production and VFX Services Ltd | Information & communication | 2020 |
| Saints Cinema Limited | Arts & recreation | 2019 |
| Saints Property Services Ltd | Real estate | 2020 |
| Saivan Care Supported Living Limited | Health & social care | 2026 |
| Saivan Property Investments Ltd | Real estate | 2022 |
| Saksi Ltd | Hospitality | 2019 |
| Sakti Limited | Health & social care | 2012 |
| Sal's Kitchen (Upminster) Ltd | Hospitality | 2025 |
| Sales Vision Pro Ltd | Manufacturing | 2018 |
| Salims Tutor Limited | Education | 2025 |
| Sallies Limited | Manufacturing | 2024 |
| Salprop Devco Ltd | Real estate | 2024 |
| Salprop Ltd | Real estate | 2024 |
| Salsa Furniture Limited | Wholesale & retail | 2017 |
| Salsa Secrets Ltd | Arts & recreation | 2024 |
| Salt Media Creatives Limited | Information & communication | 2022 |
| Salt N Vinegar Ltd | Hospitality | 2025 |
| Salty London Ltd | Manufacturing | 2024 |
| SAM Automotive Limited | Wholesale & retail | 2020 |
| SAM Computers Solution Ltd | Hospitality | 2021 |
| SAM Spade Ltd | Transport & logistics | 2019 |