| Solutions 2 Interiors Ltd | Manufacturing | 2021 |
| Solutions Bay Ltd | Wholesale & retail | 2017 |
| Solutions by AB Ltd | Wholesale & retail | 2026 |
| Solv Admin Limited | Administrative & support | 2025 |
| Solvang Ltd | Transport & logistics | 2018 |
| Solvers Architecture Ltd | Construction | 2024 |
| Solvers Estates Limited | Real estate | 2008 |
| Solvers Pension Administration Limited | Financial services | 2020 |
| Solvers Studio Ltd | Professional & scientific | 2018 |
| SOLVERS2026 Ltd | Real estate | 2026 |
| Solvior UK Ltd | Information & communication | 2024 |
| Soma & Sons Ltd | Professional & scientific | 2011 |
| Soma.A Properties Ltd | Real estate | 2021 |
| Somaco Group Limited | Administrative & support | 2022 |
| Somaiya Motors Limited | Wholesale & retail | 2025 |
| Somak Ltd | Real estate | 2022 |
| Somali Messengers Ltd | Professional & scientific | 2024 |
| Sombrero Foodchain Limited | Hospitality | 2018 |
| Somebrightspark Holdings Ltd | Financial services | 2021 |
| Somebrightspark Limited | Information & communication | 2008 |
| Somerby AI Ltd | Information & communication | 2025 |
| Somerby Pharm Ltd | Manufacturing | 2025 |
| Somerby Transport Ltd | Transport & logistics | 2023 |
| Somerfield Contractors Limited | Construction | 2005 |
| Somerleigh Court Ltd | Other services | 2001 |
| Somerset International Trading Ltd | Wholesale & retail | 2024 |
| Somerset Properties Limited | Real estate | 2014 |
| Somerset Webb Ltd | Wholesale & retail | 2025 |
| Somerville Life Limited | Health & social care | 2019 |
| Somiibooks Ltd | Wholesale & retail | 2023 |
| Somnath Mahadev Group Leicester C.I.C. | Health & social care | 2025 |
| Somtaxi Hire Ltd | Transport & logistics | 2024 |
| SON of Kaleka Ltd | Wholesale & retail | 2025 |
| Sona Jewellers Ltd | Wholesale & retail | 2025 |
| Sona Rupa Limited | Wholesale & retail | 1982 |
| Sonacharles Ltd | Health & social care | 2019 |
| Sonal Limited | Real estate | 2024 |
| Sonal's Little Stars Limited | Health & social care | 2024 |
| Sonar and Friends Ltd | Education | 2025 |
| Sonar Technologies Limited | Administrative & support | 2003 |
| Sonara Music Group Ltd | Information & communication | 2025 |
| Sonarik Limited | Real estate | 2023 |
| Sonatex Limited | Real estate | 2012 |
| Sonder Solutions Limited | Information & communication | 2018 |
| Sonex Consulting Ltd | Wholesale & retail | 2026 |
| SONEX21 Stores Ltd | Wholesale & retail | 2021 |
| Songhai Wood Products Ltd | Manufacturing | 2022 |
| Soni (GB) Limited | Professional & scientific | 2008 |
| Soni Auto Limited | Wholesale & retail | 2010 |
| Soni Skin Care Clinic Ltd | Health & social care | 2022 |
| Soni-Soft Limited | Information & communication | 1998 |
| Sonic Cars Limited | Wholesale & retail | 2018 |
| Sonic Financial Services Limited | Professional & scientific | 2018 |
| Sonic WAX Distribution Limited | Information & communication | 2026 |
| Sonic WAX Pressing Limited | Manufacturing | 2021 |
| Sonic WAX Records Ltd | Information & communication | 2016 |
| Sonic-Mc Limited | Professional & scientific | 2012 |
| Sonice.Space Ltd | Wholesale & retail | 2018 |
| Sonik Autos Limited | Wholesale & retail | 2015 |
| Sonik Limited | Real estate | 2016 |
| Sonika&Giselle Properties Ltd | Real estate | 2017 |
| Sonny Odedra Ltd | Health & social care | 2021 |
| Sons and Daughters, MAN With a Van Ltd | Administrative & support | 2025 |
| Sonu Beauty Services Ltd | Other services | 2022 |
| Sonu Laila Sharma Ltd | Manufacturing | 2023 |
| Sonwin Limited | Construction | 2006 |
| Sood Partnership LLP | | 2019 |
| Soodir Global Ltd | Other services | 2026 |
| Sooriah Investments Limited | Real estate | 2021 |
| Sophia Design Limited | Manufacturing | 2016 |
| Sophia Mirza Limited | Manufacturing | 2012 |
| Sophie Hartshorn Consulting Ltd | Information & communication | 2022 |
| Sophistry Ltd | Arts & recreation | 2015 |
| Sophtag Limited | Health & social care | 2014 |
| Sophy (the Volt) Ltd | Hospitality | 2024 |
| Soprus Ltd | Financial services | 2021 |
| Sorak Properties Limited | Extraterritorial | 2019 |
| Sorathia Investments Ltd | Real estate | 2021 |
| Sorax Ltd | Information & communication | 2025 |
| Sorella Leicester Limited | Real estate | 2019 |
| Soria Convenience Store Limited | Wholesale & retail | 2025 |
| Sorinaki Ltd | Transport & logistics | 2025 |
| Sorinash Ltd | Construction | 2026 |
| Sors Property Associates Ltd | Real estate | 2018 |
| Sorted Sealants Ltd | Construction | 2024 |
| Sorthi Visa and Travels Ltd | Administrative & support | 2025 |
| SOS Dent Care Ltd | Administrative & support | 2022 |
| Sotokoi Enterprise Ltd | Wholesale & retail | 2024 |
| Soul Awakening Ltd | Health & social care | 2025 |
| Soul Full of Love Limited | Arts & recreation | 2017 |
| Soul Garments Ltd | Manufacturing | 2025 |
| Soul Looms Limited | Wholesale & retail | 2026 |
| Soul Mind Body Community Club | Arts & recreation | 2020 |
| Soul of Egypt Ltd | Administrative & support | 2025 |
| Soul Property Solutions Limited | Real estate | 2020 |
| Soul Strategies Limited | Real estate | 2018 |
| Soul to Soul Care Company Ltd | Health & social care | 2022 |
| Sound Achievements (Yorkshire) Limited | Wholesale & retail | 2011 |
| Sound Balance Bookkeeping Limited | Professional & scientific | 2025 |
| Sound Sense | Other services | 2000 |