| Sartey Marketing Ltd | Other services | 2023 |
| Sartra Group Limited | Financial services | 2026 |
| Sartra International Limited | Wholesale & retail | 1983 |
| Sarup Properties Ltd | Real estate | 2024 |
| Sarvaiya Ltd | Real estate | 2019 |
| Sarvejeet Singh Ltd | Construction | 2018 |
| Sarvella Ltd | Professional & scientific | 2022 |
| Sarwar Shahida Cardiovascular Science (UK) Ltd | Health & social care | 2024 |
| SAS Accountancy Services (LON) Ltd | Professional & scientific | 2003 |
| SAS H&S Ltd | Energy | 2023 |
| SAS Properties and Investments Limited | Real estate | 2020 |
| SAS Properties London Ltd | Real estate | 2023 |
| SAS Property Management Limited | Households | 2010 |
| Sasha Solutions Limited | Real estate | 2015 |
| Sashvi Consultancy Limited | Information & communication | 2017 |
| Sasmed Limited | Administrative & support | 2021 |
| Sass Technologies Ltd | Information & communication | 2018 |
| Sassy LA Femme Limited | Wholesale & retail | 2022 |
| Sasui Ltd | Wholesale & retail | 2025 |
| SAT Fabric Ltd | Wholesale & retail | 2018 |
| SAT Security Services Ltd | Administrative & support | 2018 |
| Satb Enterprise Ltd | Construction | 2025 |
| Satellite and Media Services Ltd | Information & communication | 2021 |
| Sath Guru Limited | Wholesale & retail | 2011 |
| Sathrana Plumbing and Builder Limited | Other services | 2016 |
| Sathyabhama Care Private Ltd | Health & social care | 2019 |
| Sathyam Enterprise Ltd | Wholesale & retail | 2011 |
| Sathyam Investments Ltd | Real estate | 2014 |
| Satnam Singh Ltd | Real estate | 2015 |
| Satnam UK Builders Ltd | Construction | 2024 |
| Satt Caterers Limited | Hospitality | 2011 |
| Satt Realty UK Limited | Real estate | 2021 |
| Satti Brothers Ltd | Wholesale & retail | 2025 |
| Satti Construction Ltd | Construction | 2025 |
| Saturday Respite Limited | Arts & recreation | 2016 |
| Saturn Developers Ltd | Real estate | 2024 |
| Satvik Capital Ltd | Wholesale & retail | 2024 |
| SAU Global Limited | Wholesale & retail | 2025 |
| Saudi British Investment Company (London) Limited | Real estate | 2025 |
| Saudi British Investment Company Limited | Financial services | 2014 |
| Sautech Consultancy Limited | Information & communication | 2012 |
| Sautech Media Limited | Information & communication | 2015 |
| Sauz Limited | Transport & logistics | 2024 |
| Sava Services Ltd | Construction | 2017 |
| Savannah Catering Limited | Hospitality | 2019 |
| Savannah Coffee Limited | Hospitality | 2019 |
| Save Energy Trade World Limited | Construction | 2022 |
| Save OUR Youths Limited | Hospitality | 2019 |
| Save Wise Property Ltd | Real estate | 2024 |
| Savemax Ltd | Wholesale & retail | 2025 |
| Savi Members Ltd | Other services | 2023 |
| Savi Merch Ltd | Wholesale & retail | 2023 |
| Savi Studios Ltd | Information & communication | 2023 |
| Savi Views Ltd | Professional & scientific | 2023 |
| Savian Construction Ltd | Construction | 2024 |
| Savigo Ltd | Wholesale & retail | 2025 |
| Saville & Co Limited | Professional & scientific | 2025 |
| Saviraj Constructions Limited | Households | 2025 |
| Saviro Limited | Health & social care | 2024 |
| Savour Chefs Ltd | Hospitality | 2026 |
| Savour Foods Ilford Limited | Hospitality | 2026 |
| Savour Foods Intl Limited | Hospitality | 2024 |
| Savour International Services Ltd | Wholesale & retail | 2015 |
| Savour Platters Ltd | Hospitality | 2026 |
| Savoury Haven Ilford Ltd | Hospitality | 2024 |
| SAVPAS7 Limited | Health & social care | 2016 |
| Savvills UK Ltd | Professional & scientific | 2026 |
| Savvy Consulting Services Ltd | Professional & scientific | 2025 |
| Savy Marts Ltd | Wholesale & retail | 2025 |
| SAW Property Management Limited | Real estate | 2018 |
| SAW Rahman Limited | Wholesale & retail | 2020 |
| Sawa Carers Limited | Health & social care | 2024 |
| Sawag & Co Limited | Professional & scientific | 2009 |
| Sawag Properties Ltd | Real estate | 2020 |
| Saxon Academy of Learning Limited | Education | 2013 |
| Saxon Healthcare Ltd | Health & social care | 2017 |
| Saxon Property Group Ltd | Real estate | 2023 |
| Saxonseal Limited | Hospitality | 2025 |
| Saxton Group Limited | Financial services | 2009 |
| SAY Homes Ltd | Real estate | 2023 |
| Saya Solutions Ltd | Construction | 2025 |
| Saydan Ltd | Wholesale & retail | 2025 |
| Sayg Limited | Information & communication | 2015 |
| Sayin Events Ltd | Hospitality | 2025 |
| Sayli Group Limited | Construction | 2021 |
| Sayo Construction Ltd | Construction | 2019 |
| Sayyah Ltd. | Administrative & support | 2024 |
| Sayyl Ltd | Real estate | 2023 |
| Sayz Ltd | Real estate | 2024 |
| SAZ London Rooms Limited | Real estate | 2025 |
| Sazirar Medical Limited | Real estate | 2009 |
| SB 95 Limited | Wholesale & retail | 2026 |
| SB Assets Trades UK Ltd | Real estate | 2024 |
| SB Commercial Consultants Ltd | Professional & scientific | 2018 |
| SB Education Group Ltd | Education | 2022 |
| SB Intl Ltd. | Real estate | 2012 |
| SB Locums Ltd | Professional & scientific | 2010 |
| SB Parcel Ltd | Transport & logistics | 2024 |
| SB Secure Ltd | Administrative & support | 2024 |
| SB Slim N Beauty Limited | Other services | 2015 |