| Smith’S Fish and Chips Ltd | Hospitality | 2018 |
| Smith’S Landscaping and Construction Ltd | Construction | 2024 |
| SMJ Holdings Limited | Financial services | 2023 |
| Smlh Ltd | Hospitality | 2025 |
| SMM Process Engineering Limited | Professional & scientific | 2022 |
| SMN Holdings Ltd | Extraterritorial | 2026 |
| SMO Developments Ltd | Real estate | 2020 |
| Smoke Angel Limited | Wholesale & retail | 2023 |
| Smoked Bros Ltd | Hospitality | 2025 |
| Smokes Vapes Limited | Wholesale & retail | 2026 |
| Smokey's INK Ltd | Wholesale & retail | 2014 |
| Smoki Ltd | Hospitality | 2025 |
| Smooth Clean London Ltd | Administrative & support | 2018 |
| Smoothday PA Ltd | Public administration | 2026 |
| SMP Architects Limited | Professional & scientific | 1996 |
| SMP Imports Ltd | Wholesale & retail | 2024 |
| SMQ Properties Ltd | Other services | 2010 |
| SMR Inns Ltd | Hospitality | 2023 |
| SMS Motors Ltd | Wholesale & retail | 2023 |
| Smsgpr Property Limited | Real estate | 2024 |
| SMT Advisory Limited | Professional & scientific | 2025 |
| Smte Ltd | Health & social care | 2025 |
| SMW Consultancy (UK) Limited | Professional & scientific | 2021 |
| SMW Welding Supplies & Solutions Limited | Wholesale & retail | 2026 |
| SMX Locums Ltd | Health & social care | 2022 |
| Smythe Smith and Hooper Limited | Hospitality | 2019 |
| SN2 Healthcare Consulting Limited | Health & social care | 2025 |
| SNA Group Ltd | Professional & scientific | 2023 |
| SNA Strats Limited | Professional & scientific | 2022 |
| SNA UK Properties Ltd | Real estate | 2023 |
| Snaax Ltd | Extraterritorial | 2011 |
| Snack Brands Limited | Manufacturing | 2004 |
| Snackzilla Ltd | Manufacturing | 2018 |
| Snag ADS Ltd | Professional & scientific | 2026 |
| Snaithing Heights Limited | Households | 2006 |
| Snaithing Holdings Limited | Financial services | 2024 |
| Snake Edge Ltd | Wholesale & retail | 2019 |
| Snap Box Cafe Limited | Hospitality | 2026 |
| Snap in and OUT Ltd | Hospitality | 2022 |
| Snap Time Fasteners Limited | Wholesale & retail | 2026 |
| Snap Time Limited | Wholesale & retail | 2017 |
| Snapdragon Trading Ltd | Hospitality | 2019 |
| Snape Estates Limited | Real estate | 2025 |
| Snapgen Limited | Wholesale & retail | 2025 |
| Snapora Limited | Wholesale & retail | 2025 |
| SNB Leisure Ltd | Hospitality | 2026 |
| SNE Associates Limited | Health & social care | 2024 |
| SNE Properties Limited | Real estate | 2017 |
| SNG Estate Management Ltd | Real estate | 2024 |
| SNG Productions Ltd | Information & communication | 2022 |
| SNG Worldwide LLP | | 2024 |
| SNM Enterprise Ltd | Hospitality | 2025 |
| SNM Premier Stays Ltd | Real estate | 2024 |
| Snooty Catz Limited | Wholesale & retail | 2016 |
| Snow Family Investment Group Ltd | Financial services | 2025 |
| Snowcream Express Ltd | Hospitality | 2021 |
| Snowflakes Home Ltd | Real estate | 2024 |
| SNS Lincoln Property Ltd | Real estate | 2023 |
| Snsa Limited | Administrative & support | 2026 |
| Snspat Ltd | Other services | 2011 |
| SNT Auto Services Ltd | Administrative & support | 2019 |
| Snug Works Ltd | Construction | 2024 |
| Snugg Kids Limited | Wholesale & retail | 2018 |
| Snuggie Paws Ltd | Manufacturing | 2025 |
| Snuggles and Sass Ltd | Wholesale & retail | 2025 |
| Snugtrekker Ltd | Wholesale & retail | 2025 |
| SO Grounded Ltd | Hospitality | 2016 |
| SO Wellbeing Limited | Other services | 2019 |
| So-Me App Ltd | Wholesale & retail | 2025 |
| Soak Installations Limited | Construction | 2017 |
| Soar Community | Other services | 2004 |
| Soar Enterprises Limited | Administrative & support | 2004 |
| SOAR2 Ltd | Education | 2022 |
| Sober Enterprises Limited | Education | 2024 |
| Sobey Mortgages Ltd | Professional & scientific | 2023 |
| Socha Property Limited | Real estate | 2024 |
| Social Adverts Ltd | Professional & scientific | 2025 |
| Social Beasts Ltd | Administrative & support | 2026 |
| Social Care and Health Collaborative LLP | | 2024 |
| Social Care Collectives | Health & social care | 2025 |
| Social Club Pictures Limited | Information & communication | 2019 |
| Social Pickle CIC | Manufacturing | 2024 |
| Social POD Ltd | Administrative & support | 2017 |
| Social Sheffield Limited | Professional & scientific | 2013 |
| Social Squad Stocksbridge CIC | Arts & recreation | 2026 |
| Social WE Talk Limited | Information & communication | 2014 |
| Social Welfare Organization UK | Other services | 2012 |
| Social Work Life Hub Ltd | Health & social care | 2025 |
| Socially Creative Ltd | Professional & scientific | 2022 |
| Society Bar Ltd | Hospitality | 2019 |
| Society for the Advancement of Management Studies Limited(The) | Information & communication | 1963 |
| Socium Recruitment Limited | Administrative & support | 2017 |
| Soco Improvement Ltd | Health & social care | 2013 |
| Sodef Ltd | Wholesale & retail | 2020 |
| Sofa 4 U Ltd | Other services | 2026 |
| Sofa Expert Ltd | Wholesale & retail | 2016 |
| Sofa Mart Ltd | Wholesale & retail | 2020 |
| Sofa Savvy Limited | Wholesale & retail | 2016 |
| Sofa Traders (SY) Ltd | Wholesale & retail | 2018 |
| Sofalux (UK) Ltd | Other services | 2013 |