| Superfast Driving School Ltd | Education | 2025 |
| Superfirm Limited | Wholesale & retail | 1986 |
| Superfirm Properties Ltd | Real estate | 2021 |
| Superior Interior Projects Ltd | Construction | 2016 |
| Superior Leather Garments Limited | Wholesale & retail | 2024 |
| Superior Moments Limited | Information & communication | 2016 |
| Superior Security and Services Limited | Administrative & support | 2019 |
| Superlative Jewellers Limited | Wholesale & retail | 2022 |
| Supermario Builders Ltd | Construction | 2026 |
| Supernova Sports Ltd | Wholesale & retail | 2019 |
| Supersonic Engineering Ltd | Professional & scientific | 2018 |
| Supervision Healthcare Limited | Health & social care | 2012 |
| Supper Hunt Ltd | Wholesale & retail | 2024 |
| Supper Properties Ltd | Real estate | 2025 |
| Supper Singh Builders Ltd | Construction | 2022 |
| Supperloop Ltd | Professional & scientific | 2024 |
| Supplico Ltd | Wholesale & retail | 2025 |
| Supply Chain London Ltd | Transport & logistics | 2014 |
| Supply Connect Ltd | Wholesale & retail | 2026 |
| Supply Space (London) Limited | Real estate | 2024 |
| Supplysync Ltd | Wholesale & retail | 2025 |
| Support by Heart Ltd | Health & social care | 2019 |
| Support Logistics Limited | Transport & logistics | 2024 |
| Support ME Maternal Project CIC | Health & social care | 2021 |
| Support Support Ltd | Health & social care | 2013 |
| Supraart Ltd | Wholesale & retail | 2025 |
| Supreme Animal Foods Limited | Wholesale & retail | 2005 |
| Supreme Autos Ltd | Wholesale & retail | 2024 |
| Supreme Care Support Ltd | Administrative & support | 2026 |
| Supreme Contract Solutions Ltd | Construction | 2020 |
| Supreme Corporation Ltd | Hospitality | 2024 |
| Supreme Facades Ltd | Construction | 2024 |
| Supreme Facilities Management Ltd | Administrative & support | 2020 |
| Supreme Organic Food Ltd | Wholesale & retail | 2024 |
| Supreme Scaffolding Ltd | Construction | 2025 |
| Supreme Shopfront Shutters Ltd | Construction | 2015 |
| Supreme Supplies & Trading Ltd | Wholesale & retail | 2024 |
| Supreme X Cars Limited | Administrative & support | 2026 |
| Surdhan Limited | Other services | 2022 |
| Sure Protect Ltd | Professional & scientific | 2019 |
| Sure Protect Properties Ltd | Real estate | 2019 |
| Sure Start Consultants Ltd | Health & social care | 2019 |
| Sure Success College Ltd | Professional & scientific | 2021 |
| Surefire Financial Ltd | Financial services | 2022 |
| Surefire Training Limited | Administrative & support | 2020 |
| Suretrust Ltd | Professional & scientific | 2024 |
| Surety Services Ltd | Construction | 2016 |
| Surfnexplore Ltd | Energy | 2021 |
| Surge Consultants Limited | Construction | 2022 |
| Surgical Affinity Ltd | Wholesale & retail | 2020 |
| Surgical Training Courses Limited | Extraterritorial | 2016 |
| Surgimed Limited | Health & social care | 2018 |
| Surgimpex UK Ltd | Wholesale & retail | 2021 |
| Surginor Ltd | Wholesale & retail | 2011 |
| Surgivox Ltd | Wholesale & retail | 2026 |
| Surinderjit Ltd | Real estate | 2025 |
| Surinders Properties Limited | Real estate | 2026 |
| Surith Technologies Limited | Information & communication | 2014 |
| Surkhrod Ltd | Hospitality | 2024 |
| Surma Travels Ltd | Administrative & support | 2020 |
| Surmavale Limited | Health & social care | 2019 |
| Surpass Holdings PTY Ltd | Financial services | 2022 |
| Surreal Investments Ltd | Real estate | 2019 |
| Surreal Staycations Ltd | Real estate | 2024 |
| Surrey Autos Ltd | Wholesale & retail | 2017 |
| Surrey Hill Estate Ltd | Real estate | 2023 |
| Surveillance K9 Ltd | Administrative & support | 2024 |
| Surya Bhavan Limited | Real estate | 2024 |
| Susan Builders Limited | Construction | 2022 |
| Susan Paradise Limited | Public administration | 2024 |
| Sushi Rolls & Rice Ltd | Hospitality | 2025 |
| Sushi Shiro & Co Ltd | Hospitality | 2025 |
| Sushi Tigers Barkingside Ltd | Hospitality | 2025 |
| Sushi Tigers Ltd | Hospitality | 2023 |
| Sushi Tikka Co Ltd | Hospitality | 2026 |
| Suve Motors Limited | Wholesale & retail | 2022 |
| Suvih Engineering Services Limited | Information & communication | 2022 |
| Suxuss Trading Ltd | Wholesale & retail | 2021 |
| Suzhou Consulting Limited | Administrative & support | 2007 |
| SV Business Solutions Ltd | Information & communication | 2018 |
| SV Fuels Ltd | Wholesale & retail | 2016 |
| SVA Contractors Group Ltd | Construction | 2018 |
| SVC Carpentry Limited | Construction | 2013 |
| SVG Pureplanet Installers Ltd | Construction | 2023 |
| SVG Syndicate Ltd | Wholesale & retail | 2026 |
| Svhd Limited | Real estate | 2021 |
| Svift Solutions Limited | Information & communication | 2019 |
| SVJ Properties Limited | Real estate | 2024 |
| SVM Tech Limited | Information & communication | 2026 |
| Svmp Projects Solutions Ltd | Information & communication | 2019 |
| Svmr Ltd | Real estate | 2024 |
| SVN Developers Limited | Construction | 2025 |
| Svsj Consulting Limited | Information & communication | 2024 |
| Svsl Ltd | Construction | 2015 |
| SVV Consulting Limited | Information & communication | 2011 |
| SW Corp Ltd | Wholesale & retail | 2026 |
| SW Keenan Ltd | Administrative & support | 2025 |
| Swagaat Jewellers Ltd | Wholesale & retail | 2018 |
| Swaggy Limited | Construction | 2022 |
| Swan Renov Ltd | Construction | 2018 |