| Software Compliance Limited | Information & communication | 2014 |
| Software Dynamics (UK) Ltd | Professional & scientific | 2009 |
| Software Dynamics Limited | Information & communication | 1995 |
| Software Minions Limited | Information & communication | 2015 |
| Software Testing Services (London) Ltd | Information & communication | 2012 |
| Soggyhomes Limited | Agriculture & fishing | 2025 |
| SOH Medical Limited | Health & social care | 2023 |
| Sohal Capital Ltd | Real estate | 2023 |
| Sohal Transport Ltd | Transport & logistics | 2022 |
| Sohallservices Ltd | Transport & logistics | 2025 |
| Soham Enterprise Limited | Other services | 2015 |
| Sohel Investments Limited | Real estate | 2020 |
| Sohi Properties Ltd | Real estate | 2019 |
| Soho Holdings Limited | Professional & scientific | 2015 |
| Soho Mark Ltd | Construction | 2020 |
| Sohota Contracting Limited | Administrative & support | 2015 |
| Soigné House Ltd | Manufacturing | 2025 |
| Soil MOD3 Ltd | Construction | 2018 |
| Soilcycle Limited | Water & waste | 1999 |
| Sojaho Properties Ltd | Real estate | 2026 |
| Sojourn Pilates Limited | Arts & recreation | 2025 |
| Sojourn Ventures Ltd | Information & communication | 2024 |
| Sokiri Limited | Information & communication | 2021 |
| Sokora Jewels Ltd | Wholesale & retail | 2018 |
| SOL Attire Ltd | Wholesale & retail | 2020 |
| SOL Mates Ibiza Ltd | Arts & recreation | 2024 |
| Solace by DW Ltd | Other services | 2025 |
| Solace Dent Ltd | Health & social care | 2025 |
| Solace Homes Limited | Financial services | 2017 |
| Solace Motor Group Limited | Wholesale & retail | 2021 |
| Solace With Shikila Limited | Health & social care | 2025 |
| Solanki Capital Limited | Financial services | 2024 |
| Solanki Engineering Limited | Professional & scientific | 2024 |
| Solanki Hotels Limited | Hospitality | 2022 |
| Solanki Limited | Wholesale & retail | 2013 |
| Solanki Singh Group Developments (UK1) Ltd | Construction | 2025 |
| Solanki Singh Group Developments (UK2) Ltd | Construction | 2025 |
| Solanki Singh Group Developments (UK3) Ltd | Real estate | 2025 |
| Solanki Singh Group Developments (UK4) Ltd | Real estate | 2025 |
| Solanki Singh Group Holdings Ltd | Financial services | 2025 |
| Solar 2020 Limited | Agriculture & fishing | 2020 |
| Solar Escape Ltd | Construction | 2026 |
| Solar Force Limited | Construction | 2025 |
| Solar Fused Limited | Construction | 2010 |
| Solar Hive Midlands Ltd | Construction | 2025 |
| Solar Know HOW Ltd | Administrative & support | 2024 |
| Solar Made Easy Ltd | Construction | 2026 |
| Solar Panels Leicester Ltd | Wholesale & retail | 2024 |
| Solar Smile Ltd | Health & social care | 2024 |
| Solar Source Electrical Ltd | Construction | 2024 |
| SOLAR4WATER Limited | Manufacturing | 2015 |
| Solartron Metrology Limited | Manufacturing | 2001 |
| Solatium Stays Limited | Real estate | 2025 |
| Solbodu Ltd | Information & communication | 2022 |
| Solcare Services Ltd | Health & social care | 2023 |
| Soldus Prudential Investments | Financial services | 2016 |
| Sole Automotive Glass Holdings Ltd | Financial services | 2023 |
| Sole Capital Investments Limited | Real estate | 2018 |
| Sole Full of Soul Ltd | Wholesale & retail | 2022 |
| Sole House (Retails) Limited | Wholesale & retail | 2024 |
| Sole Provider Footwear Ltd | Wholesale & retail | 2012 |
| Sole Provider Ladies Footwear Ltd | Wholesale & retail | 2018 |
| Sole Residential Investments Limited | Real estate | 2020 |
| Soleil Collections Limited | Wholesale & retail | 2023 |
| SOLICITORS4LANDLORDS Ltd | Professional & scientific | 2012 |
| Solid Beverages Ltd | Wholesale & retail | 2025 |
| Solid Finish Concrete Ltd | Construction | 2024 |
| Solid Surface Fabrication Limited | Manufacturing | 2011 |
| Solidbridge Technology Ltd | Information & communication | 2026 |
| Solidcore Builders Ltd | Construction | 2025 |
| Solide Group UK Ltd | Wholesale & retail | 2023 |
| Solitaire of Leire Limited | Manufacturing | 2008 |
| Solix Ltd | Transport & logistics | 2025 |
| Solldog Sausages Limited | Arts & recreation | 2018 |
| Sollys Doner Ltd | Hospitality | 2019 |
| Solmar (Leicester) Ltd | Hospitality | 2024 |
| Solo (Leic) Trading Ltd | Manufacturing | 2025 |
| Solo Carpentry Ltd | Other services | 2022 |
| Solo Chilled Foods Ltd | Hospitality | 2026 |
| Solo Distribution (TRN) Ltd | Hospitality | 2009 |
| Solo Sandwich Bar & Cafe Limited | Hospitality | 2014 |
| Soloman Enterprise Ltd | Professional & scientific | 2022 |
| Solomon Healthcare Limited | Health & social care | 2015 |
| Solon Studio Consultants Limited | Professional & scientific | 2016 |
| Solonic Business Services Ltd | Administrative & support | 2014 |
| Solopharm Ltd | Health & social care | 2024 |
| Solor Labs Limited | Transport & logistics | 2019 |
| Solrise Private Ltd | Wholesale & retail | 2025 |
| Soltan Barber (a) Ltd | Other services | 2025 |
| Soltan Barber Suppliers Limited | Other services | 2023 |
| Soltech Electrical Systems Ltd | Construction | 2011 |
| Soltrader Motoring Limited | Wholesale & retail | 2022 |
| Solucenda Ltd | Other services | 2025 |
| Solunex Coating Technologies Ltd | Manufacturing | 2025 |
| Solutech Properties Limited | Extraterritorial | 2013 |
| Solution a Limited | Professional & scientific | 2023 |
| Solution Catering Limited | Hospitality | 2015 |
| Solution Connection Global Services Limited | Transport & logistics | 2025 |
| Solution for Brands Ltd | Information & communication | 2025 |
| Solution Icon Limited | Wholesale & retail | 2011 |