| Sarveshwar Ltd | Wholesale & retail | 2024 |
| Sarvi Technologies Limited | Information & communication | 2010 |
| Sarwsanj Enterprises UK Limited | Real estate | 2020 |
| SAS Cappartners PVT Ltd | Professional & scientific | 2017 |
| SAS Compliance Systems Ltd | Professional & scientific | 2026 |
| SAS Eigentum Ltd | Real estate | 2024 |
| SAS Management Services Limited | Professional & scientific | 2016 |
| SAS Real Estate Ltd | Construction | 2017 |
| Sasas Group Ltd | Financial services | 2023 |
| Sasca Logistics Ltd | Transport & logistics | 2020 |
| Sash Apparel Ltd | Wholesale & retail | 2024 |
| Sash Windows UK Family Ltd | Construction | 2020 |
| Sasi Panchal Consultancy Services Ltd | Professional & scientific | 2020 |
| Saskia Estates Ltd | Real estate | 2022 |
| Saso Property Ltd | Real estate | 2025 |
| Sasook Limited | Hospitality | 2018 |
| Saswat Mohanty Ltd | Information & communication | 2026 |
| SAT Homes Group Limited | Administrative & support | 2024 |
| Satasiya Assets Ltd | Real estate | 2021 |
| Satchel Security & Training Ltd | Administrative & support | 2023 |
| Satellite Limited | Real estate | 2009 |
| Satellite Moving Devices Wireless (UK) Limited | Information & communication | 2018 |
| Satfocus Ltd | Information & communication | 2015 |
| Satgurus Limited | Wholesale & retail | 2000 |
| Satheebanu Ltd | Health & social care | 2015 |
| Sathi Studios Limited | Information & communication | 2018 |
| Satijana Limited | Information & communication | 2010 |
| Satish Properties LLP | | 2024 |
| Satish Technologies Limited | Information & communication | 2020 |
| Satkartar Pound Plus Ltd | Other services | 2012 |
| Satori Trading Limited | Wholesale & retail | 2021 |
| Saturn Technology Limited | Information & communication | 2025 |
| Satvika Ltd | Health & social care | 2024 |
| Satyan Jewellers Limited | Wholesale & retail | 1998 |
| SAU Equity Ltd | Real estate | 2017 |
| Sauceyfun Limited | Wholesale & retail | 2024 |
| Sauki Enterprise Ltd | Hospitality | 2024 |
| Saul (Luas) Nash Ltd | Manufacturing | 2018 |
| Saumya Limited | Wholesale & retail | 2014 |
| Saunders Business Advisory Limited | Professional & scientific | 2024 |
| Saunders Markets Limited | Administrative & support | 2010 |
| Saurabh Property Ltd | Real estate | 2024 |
| Saurashtra Limited | Extraterritorial | 2008 |
| SAV Wave PAY Limited | Financial services | 2026 |
| Sava T Construction Ltd. | Construction | 2018 |
| Savage Sounds Limited | Information & communication | 2002 |
| Saval Properties Limited | Real estate | 2014 |
| Savani Assets Ltd | Real estate | 2025 |
| Savani Aviation Services Ltd | Transport & logistics | 2026 |
| Savani Electrical Services Limited | Construction | 2015 |
| Savanna Europe Limited | Wholesale & retail | 2023 |
| Save China's Tigers | Professional & scientific | 2000 |
| Save&Enjoy Ltd | Wholesale & retail | 2022 |
| SAVE2SAFE Ltd | Other services | 2017 |
| Savelaw Limited | Other services | 2019 |
| Savi's Delights Ltd | Hospitality | 2023 |
| Savik Properties Limited | Real estate | 2017 |
| Saville Pharmacy Ltd | Wholesale & retail | 2019 |
| Saviour Cars Limited | Transport & logistics | 2014 |
| Saviour Ltd | Wholesale & retail | 2023 |
| Saviteck Limited | Real estate | 2022 |
| Savitr Holdings Limited | Financial services | 2025 |
| Savitri Devi Limited | Hospitality | 2013 |
| Savla Consulting Ltd | Professional & scientific | 2011 |
| Savls Tech Limited | Information & communication | 2023 |
| Savn Enterprise Ltd | Real estate | 2025 |
| Savoire Limited | Financial services | 2022 |
| Savoy Estates SPV Limited | Real estate | 2021 |
| Savra Shopping Limited | Wholesale & retail | 2025 |
| Savvy & Sand Limited | Wholesale & retail | 2012 |
| Savvy Retailers Limited | Wholesale & retail | 2024 |
| Sawasdee Therapy Ltd | Other services | 2015 |
| Sawhney Consulting Limited | Professional & scientific | 2001 |
| Sawjani Properties Limited | Real estate | 2020 |
| Saxby Care Ltd | Health & social care | 2020 |
| Saxo Property Development Limited | Real estate | 2023 |
| Saxon Mews (Maidenhead) Management Company Limited | Households | 1989 |
| Saxon Portfolio Investments Limited | Real estate | 2023 |
| Saxon Portfolio Limited | Real estate | 2022 |
| Saxontime Limited | Real estate | 1995 |
| SAY Property and Investments Limited | Real estate | 2019 |
| SAY Teeth Cosmetics Ltd | Other services | 2024 |
| Sayam Investments LLP | | 2016 |
| Sayas IT Consultancy Limited | Information & communication | 2016 |
| Saydali Ltd | Health & social care | 2014 |
| Sayl Limited | Wholesale & retail | 2023 |
| Saymur Accountants Limited | Professional & scientific | 2004 |
| Sayra Ltd | Wholesale & retail | 2022 |
| Sayz Investments Limited | Real estate | 2016 |
| SAZ Care Ltd | Administrative & support | 2025 |
| Sazim Limited | Real estate | 2017 |
| Sazz Ltd | Wholesale & retail | 2018 |
| SB and Partners LLP | | 2021 |
| SB Central London Ltd | Hospitality | 2025 |
| SB Consultancy Services Ltd | Health & social care | 2022 |
| SB Croydon Ltd | Hospitality | 2025 |
| SB Gemmological Solutions Ltd | Professional & scientific | 2024 |
| SB Quantity Surveying Services Limited | Professional & scientific | 2012 |
| SB Race Engineering Ltd | Wholesale & retail | 2010 |
| SB Sales & Services UK Limited | Wholesale & retail | 2017 |