| Sofi App Ltd | Information & communication | 2017 |
| Sofiano Ltd | Professional & scientific | 2023 |
| Soft Security Specialists Limited | Administrative & support | 2017 |
| Soft Techbio Ltd | Wholesale & retail | 2024 |
| Softanex Solutions Ltd | Information & communication | 2026 |
| Softcase Services Limited | Real estate | 2014 |
| Softom Ltd | Professional & scientific | 2018 |
| Software Products Ltd | Information & communication | 2024 |
| Software Proof Limited | Information & communication | 2024 |
| Software Provider Limited | Information & communication | 2025 |
| Softwarepromotions Limited | Information & communication | 2002 |
| Softynex Solutions Ltd | Information & communication | 2026 |
| Sogood Health Limited | Hospitality | 2006 |
| Soissojosy Commerce Ltd | Wholesale & retail | 2026 |
| Sojourn Executive Ltd | Hospitality | 2022 |
| SOK Consultancy (UK) Ltd | Information & communication | 2017 |
| Solace Cyber Limited | Extraterritorial | 2022 |
| Solace Global Limited | Other services | 2011 |
| Solace Global Maritime Limited | Other services | 2010 |
| Solace Global Projects Limited | Extraterritorial | 2022 |
| Solace Global Risk Limited | Other services | 2010 |
| Solace Land Ltd | Construction | 2013 |
| Solano Company Brazil Limited | Wholesale & retail | 2025 |
| Solar Park Energy Ltd | Energy | 2023 |
| Solar Properties Weymouth Limited | Manufacturing | 2015 |
| Solar Scaffold Services Ltd | Construction | 2010 |
| Solar Surfer Limited | Wholesale & retail | 2023 |
| Solaraccess Energy UK I Limited | Energy | 2022 |
| Solaris Property Group Ltd | Real estate | 2022 |
| Solaryx BR Ltd | Wholesale & retail | 2025 |
| Solco Group Ltd. | Professional & scientific | 2020 |
| Solderheat Ltd | Construction | 2026 |
| Solent Facilities Ltd | Administrative & support | 2022 |
| Solent HMO Limited | Real estate | 2023 |
| Solent Land & Property Limited | Wholesale & retail | 2022 |
| Solent Motor Group Limited | Wholesale & retail | 2022 |
| Solent Motor Homes Limited | Wholesale & retail | 2010 |
| Solent Projects (New Homes) Ltd | Construction | 2018 |
| Solent Projects (Southern) Limited | Construction | 1986 |
| Solent Property Services Limited | Real estate | 1998 |
| Solent Spine Ltd | Health & social care | 2022 |
| Solesupplieruk Ltd | Wholesale & retail | 2026 |
| Solid Agile Limited | Information & communication | 2017 |
| Solid Contracts Ltd | Manufacturing | 2008 |
| Solid Financial Solutions Limited | Financial services | 2013 |
| Solid Ledger Limited | Professional & scientific | 2024 |
| Solido Home Improvements Ltd | Construction | 2025 |
| Solidwave Limited | Professional & scientific | 2007 |
| Solis Capital (Holdings) Ltd | Financial services | 2019 |
| Solis Capital Contracts Limited | Construction | 2024 |
| Solis Capital LLP | | 2026 |
| Solis Capital Nominees Limited | Professional & scientific | 2026 |
| Solis Capital Services Limited | Professional & scientific | 2017 |
| Sollutio Limited | Wholesale & retail | 2025 |
| Solreed Limited | Real estate | 1993 |
| Solus Work Limited | Information & communication | 2026 |
| Solution Glazing Limited | Construction | 2023 |
| Solution Savvy Consulting Ltd | Information & communication | 2024 |
| Solutions QGD Ltd | Wholesale & retail | 2022 |
| Solve Solutions Ltd | Information & communication | 2015 |
| Solvex GP Ltd | Information & communication | 2026 |
| Solviq Ltd | Information & communication | 2012 |
| Soma Technology Ltd | Wholesale & retail | 2020 |
| Somar Holdings Limited | Financial services | 2026 |
| Sometime Songs Limited | Information & communication | 2007 |
| Somewhere Over the Framework Ltd | Education | 2025 |
| Somnel Ltd | Wholesale & retail | 2024 |
| Sona and Services Ltd | Administrative & support | 2021 |
| Sonata Homes Ltd | Construction | 2015 |
| Song LLP | | 2023 |
| Sonja Lockyer Limited | Administrative & support | 2016 |
| Sonkai Solutions Limited | Health & social care | 2016 |
| Sonnet Freehold Ltd | Real estate | 2023 |
| Sonvino Ltd. | Wholesale & retail | 2015 |
| Sooth$Ayer .!Inc Ltd | Professional & scientific | 2025 |
| Sopel Ltd | Real estate | 2019 |
| Sophaime Limited | Real estate | 2017 |
| Sopham Holdings Ltd | Financial services | 2017 |
| Sophia Smith Limited | Information & communication | 2017 |
| Sophon Ventures Ltd | Information & communication | 2019 |
| Sopro Group Limited | Real estate | 2021 |
| Sorethumbz Limited | Wholesale & retail | 2016 |
| Soreza Clothing Ltd | Wholesale & retail | 2024 |
| Sorted Dorset Ltd | Administrative & support | 2019 |
| Sortiq Limited | Information & communication | 2025 |
| SOS Boilers Ltd | Construction | 2019 |
| SOS in BEL Air Ltd | Information & communication | 2015 |
| SOS Swim Ltd | Other services | 2014 |
| Sosiego Studio Ltd | Professional & scientific | 2026 |
| Soskco Ltd | Professional & scientific | 2010 |
| Soteria Engineering Limited | Professional & scientific | 2023 |
| Soteria Fire and Security Ltd | Construction | 2017 |
| Soteria International Limited | Health & social care | 2023 |
| Soteria Systems Limited | Extraterritorial | 2019 |
| Soul Candy Club Ltd | Arts & recreation | 2018 |
| Soulmums Ltd | Information & communication | 2021 |
| Soulswipe Ltd | Information & communication | 2025 |
| Sound Images TV Ltd | Information & communication | 2003 |
| Sound Travels Live Ltd | Arts & recreation | 2014 |
| Soundcellar Music C.I.C. | Arts & recreation | 2018 |