| Snapdragon TV Limited | Extraterritorial | 2012 |
| Snappy Tomato Pizza Limited | Hospitality | 1993 |
| SNB Software PVT Limited | Information & communication | 2014 |
| SND Consulting Limited | Information & communication | 2022 |
| Sneh Ltd | Wholesale & retail | 2020 |
| Sneha 14 Limited | Real estate | 2016 |
| Snehi Investment Ltd | Hospitality | 2013 |
| SNF Consultants Limited | Professional & scientific | 2012 |
| Snidescreates Ltd | Information & communication | 2026 |
| SNK Foods Limited | Hospitality | 2014 |
| Snkb Limited | Wholesale & retail | 2014 |
| Snkeerth Enterprise Ltd | Real estate | 2025 |
| Snkn Ltd | Professional & scientific | 2023 |
| Snorestore Limited | Wholesale & retail | 2001 |
| Snow Bunny Limited | Other services | 2022 |
| Snow Hill Residents Property Management Limited | Households | 2004 |
| Snow-White DRY Cleaner & Launderette Ltd | Other services | 2023 |
| Snowberry Acre Limited | Real estate | 2023 |
| Snowden Developments Limited | Construction | 2016 |
| Snowfall Editions UK Limited | Information & communication | 2024 |
| Snowwhite Capital Ltd | Real estate | 2021 |
| Snowwhite Car Park Ltd | Transport & logistics | 2024 |
| SNP Holdings Ltd | Financial services | 2024 |
| SNP LLP | | 2023 |
| SNP Portfolio Ltd | Real estate | 2024 |
| Snpy Ltd | Real estate | 2022 |
| SNR Impex Ltd | Wholesale & retail | 2023 |
| SNR Solutions Limited | Construction | 2026 |
| SNR2 Limited | Financial services | 2022 |
| SNS Absolute Care Limited | Health & social care | 2021 |
| SNS Beauty Group Ltd | Manufacturing | 2025 |
| SNS Constuction Ltd | Construction | 2012 |
| SNS Kiosks Ltd | Hospitality | 2025 |
| Snswiftgo Limited | Other services | 2024 |
| Snug Café Limited | Hospitality | 2022 |
| Snus Vikings Ltd | Wholesale & retail | 2024 |
| SNZ Consulting Ltd | Information & communication | 2013 |
| Soap & Spin Ltd | Other services | 2026 |
| Soarcrest Tradeverse Ltd | Wholesale & retail | 2025 |
| Sobaka Ltd | Information & communication | 2021 |
| SOC Management Ltd | Professional & scientific | 2015 |
| Social & Community Care Ltd | Health & social care | 2004 |
| Social Angels Limited | Professional & scientific | 2023 |
| Social Care Consortium Ltd | Health & social care | 2011 |
| Social Dreamz Ltd | Information & communication | 2025 |
| Social Education & Counselling Services Limited | Health & social care | 2013 |
| Social Hospitality Limited | Real estate | 2023 |
| Social Impact Products Ltd | Wholesale & retail | 2025 |
| Social Justice Collective Limited | Health & social care | 2020 |
| Social Outsource Limited | Information & communication | 2024 |
| Social Work Services (London) Limited | Health & social care | 2014 |
| Socialdealr Limited | Wholesale & retail | 2023 |
| Societe Cylsa London Limited | Extraterritorial | 1980 |
| Sock Maintenance Ltd | Households | 2017 |
| Soco Eight Investment Limited | Real estate | 2020 |
| Socria Limited | Real estate | 2024 |
| Sodarec Ltd | Administrative & support | 2023 |
| Sofia ADA Tourism Limited | Administrative & support | 2024 |
| Sofiro Ltd | Wholesale & retail | 2022 |
| Soft Surface Engineering CIC | Professional & scientific | 2024 |
| Soft Tech Software Bi̇li̇şi̇m Danişmanlik Limited | Administrative & support | 2017 |
| Softam Consult Ltd | Professional & scientific | 2016 |
| Softcore Furnishings Limited | Manufacturing | 2016 |
| Softec Realty Limited | Real estate | 2016 |
| Softhouse (Services) Limited | Information & communication | 2001 |
| Softvyn Ltd | Information & communication | 2026 |
| Software & Motor UK Ltd | Information & communication | 2017 |
| Software Analytics Limited | Information & communication | 2016 |
| Software Engineering Solutions Ltd | Administrative & support | 2013 |
| Software Solutions and Training Limited | Information & communication | 2012 |
| Softwareology Ltd | Professional & scientific | 2025 |
| Soha Retreats Limited | Other services | 2023 |
| Sohail & Co. Certified Public Accountants Ltd | Professional & scientific | 2025 |
| Soham London CIC | Wholesale & retail | 2020 |
| Sohk Limited | Financial services | 2012 |
| Sohni Food and Wine Ltd | Wholesale & retail | 2021 |
| Soho Student Living Lanark Limited | Real estate | 2018 |
| Soho Student Living Portsmouth Limited | Real estate | 2017 |
| Sohrab Import Export Ltd | Wholesale & retail | 2025 |
| Soil & Water Solutions Limited | Water & waste | 2013 |
| SOL Invictus Consultancy Limited | Administrative & support | 2011 |
| SOL Shops Ltd | Wholesale & retail | 2016 |
| Sol-Tech Solutions Limited | Professional & scientific | 2010 |
| Sola Residences Ltd | Real estate | 2025 |
| Sola TB Accountants Ltd | Professional & scientific | 2019 |
| Solace Community Care Ltd | Health & social care | 2001 |
| Solana Groups Limited | Construction | 2024 |
| SOLAR4GOOD UK Ltd | Construction | 2020 |
| Solaranet Limited | Information & communication | 2013 |
| Solaris Capital Management Ltd | Professional & scientific | 2023 |
| Solarise Technology Ltd | Information & communication | 2020 |
| Solarmount Limited | Construction | 2011 |
| Solartric Solutions Ltd | Construction | 2025 |
| Solathat Limited | Administrative & support | 2016 |
| Sole Netball Ltd | Education | 2025 |
| Solent Capital Partners Ltd | Construction | 2014 |
| Soleos Investments UK Limited | Manufacturing | 2022 |
| Solid Frame Construction Limited | Construction | 2026 |
| Solid Rock Homes Limited | Real estate | 2019 |
| Solid Rock Plus U.K. Ltd | Professional & scientific | 2004 |