| SS Gruham Ltd | Real estate | 2023 |
| SS Houses Ltd | Real estate | 2022 |
| SS IT Network Security & Cloud PVT Limited | Information & communication | 2026 |
| SS IT Solutions Ltd | Professional & scientific | 2021 |
| SS Logistics Ltd | Transport & logistics | 2021 |
| SS Medix Ltd | Health & social care | 2015 |
| SS Motorz Ltd | Wholesale & retail | 2023 |
| SS Quality Supplies Ltd | Transport & logistics | 2025 |
| SS Social Housing Limited | Real estate | 2024 |
| SS Software Solutions Private Limited | Information & communication | 2023 |
| SS4U Ltd | Wholesale & retail | 2019 |
| SSA Automotives Ltd | Wholesale & retail | 2023 |
| SSA Enterprise Ltd | Wholesale & retail | 2026 |
| SSA Solutions Limited | Professional & scientific | 2012 |
| Ssaj IT Consulting Services Ltd | Information & communication | 2016 |
| Ssav Properties Ltd | Real estate | 2024 |
| SSB Services Ltd | Other services | 2025 |
| SSC Estates Ltd | Real estate | 2023 |
| SSC Joaquin Company Limited | Health & social care | 2024 |
| SSC Transport Services Limited | Transport & logistics | 2022 |
| SSD Corporation Limited | Administrative & support | 2015 |
| SSD Smart Homes Ltd | Other services | 2019 |
| Ssjb Contractors Limited | Construction | 2017 |
| Ssjelectricalservices Ltd | Construction | 2022 |
| Ssjfx Ltd | Financial services | 2025 |
| SSK Couriers Limited | Transport & logistics | 2024 |
| Sskrap Revive Ltd | Wholesale & retail | 2024 |
| SSL (RB) Products Limited | Professional & scientific | 1963 |
| SSL CL Limited | Professional & scientific | 2023 |
| SSL International PLC | Financial services | 1944 |
| SSL Products Limited | Financial services | 1971 |
| Sslr Infotech Limited | Information & communication | 2019 |
| SSM Infotech Ltd | Information & communication | 2005 |
| SSM Talent Limited | Administrative & support | 2024 |
| SSO Services Limited | Transport & logistics | 2025 |
| SSP Building Services Ltd | Construction | 2019 |
| SSR Group UK Ltd | Transport & logistics | 2017 |
| SSR Logistics Ltd | Transport & logistics | 2023 |
| SSS Accounting and Advisory Limited | Professional & scientific | 2024 |
| SSS Food & Drinks Ltd | Wholesale & retail | 2022 |
| SSS Traffic Ltd | Construction | 2023 |
| Sssab Ltd | Information & communication | 2026 |
| Sssh Holdings Ltd | Financial services | 2025 |
| SST 21 Ltd | Health & social care | 2024 |
| Ssuamz Ltd | Wholesale & retail | 2023 |
| Sswiss Ltd | Wholesale & retail | 2025 |
| Ssys IT Consol Ltd | Information & communication | 2023 |
| ST Accountants Limited | Professional & scientific | 2024 |
| ST George Health Limited | Health & social care | 2024 |
| ST John Pharmacy Ltd | Wholesale & retail | 2017 |
| ST Johns Wood Lane Limited | Real estate | 2023 |
| ST Nicholas Court (Newbury) Management Company Limited | Households | 2002 |
| ST Thomas Mews Residents Limited | Extraterritorial | 2008 |
| ST. Andrews Court (Colnbrook) Limited | Households | 1992 |
| ST4NFORD-SERVICES Limited | Administrative & support | 2022 |
| ST5 Transport Ltd | Transport & logistics | 2025 |
| STA Group Ltd. | Wholesale & retail | 2015 |
| STA Smart Homes Limited | Construction | 2021 |
| Staa Private Limited | Construction | 2020 |
| Stacdene Properties Limited | Real estate | 1972 |
| Stack 'N' Slice Ltd | Hospitality | 2025 |
| Stack Link UK Ltd | Wholesale & retail | 2022 |
| Stacy Does Flavour Limited | Hospitality | 2024 |
| Staff Genix Ltd | Information & communication | 2025 |
| Staff Support Services Limited | Health & social care | 2013 |
| Staffers UK Ltd | Hospitality | 2022 |
| Staffing Solutions Worldwide Limited | Administrative & support | 2022 |
| Staffology Limited | Information & communication | 2019 |
| Stag & Hound Movers Ltd | Transport & logistics | 2025 |
| Staghead Store Ltd | Wholesale & retail | 2025 |
| Stahlhaus Ltd | Professional & scientific | 2020 |
| Stak Logistics Limited | Transport & logistics | 2025 |
| Stallion Home Improvements Ltd | Manufacturing | 2023 |
| Stamp 247 Ltd | Wholesale & retail | 2025 |
| Stand by U Care and Security Ltd | Health & social care | 2016 |
| Stand Fast Film Scenery Ltd | Manufacturing | 2025 |
| Standard Construct Ltd | Construction | 2022 |
| Standout Clothing Club Ltd | Wholesale & retail | 2026 |
| Stanford Media Enterprises Ltd | Information & communication | 2016 |
| Stanley Road Market Ltd | Wholesale & retail | 2026 |
| Stanley Rose Films Ltd | Information & communication | 2026 |
| Stanstart Limited | | 1992 |
| Stanwell Food & Wine Ltd | Wholesale & retail | 2026 |
| Staple Diet Print Finishing Limited | Professional & scientific | 1991 |
| Star Aviation Services Limited | Transport & logistics | 1997 |
| Star Basket Limited | Wholesale & retail | 2025 |
| Star Build London Ltd | Construction | 2023 |
| Star Cakes Slough Ltd | Wholesale & retail | 2019 |
| Star Echo Ltd | Information & communication | 2026 |
| Star Enterprises Services Limited | Transport & logistics | 2024 |
| Star Enterprises Ltd | Wholesale & retail | 2018 |
| Star Grade Labour Supplier Ltd | Administrative & support | 2026 |
| Star Halal Food Services Ltd | Hospitality | 2021 |
| Star Haulage Services Limited | Transport & logistics | 2024 |
| Star Holdings Limited | Real estate | 2018 |
| Star Moving UK Ltd | Transport & logistics | 2019 |
| Star Rise Traders Ltd | Wholesale & retail | 2025 |
| Star Services London Limited | Transport & logistics | 2010 |
| Star Skips Ltd | Water & waste | 2015 |
| Star Trading Limited | Real estate | 2019 |