| Stepping Stones Together C.I.C. | Health & social care | 2024 |
| Sterling Books Ltd | Professional & scientific | 2023 |
| Sterling Capital Services Ltd | Financial services | 2022 |
| Sterling Dental Foundation Limited | Education | 2013 |
| Sterling Fame Ltd | Wholesale & retail | 2026 |
| Sterling Presentations Ltd | Other services | 2009 |
| Sterling Properties Private Ltd | Real estate | 2022 |
| Sterling Services Private Ltd | Other services | 2009 |
| Sterling Smile Ltd | Health & social care | 2021 |
| Stewardship of Holy Spirit Church Ltd | Other services | 2024 |
| Stocktrack Ltd | Information & communication | 2026 |
| Stoke Proprietors Ltd | Real estate | 2021 |
| Stone CUT Ltd | Manufacturing | 2020 |
| Story Studios-Uk Ltd | Professional & scientific | 2020 |
| STR Associates Ltd | Professional & scientific | 2013 |
| STR FS UK Ltd | Financial services | 2023 |
| STR Propco Ltd | Real estate | 2024 |
| Straightoutthecloset Ltd | Information & communication | 2022 |
| Strango Rendering UK Ltd | Wholesale & retail | 2020 |
| Strategic Designs and Graphics Ltd | Manufacturing | 2019 |
| Stratos Global Limited | Administrative & support | 2025 |
| Stream Team Limited | Financial services | 2020 |
| Striveera Ltd | Wholesale & retail | 2025 |
| Strong Rock Construction Ltd | Construction | 2021 |
| Strongerbuild Ltd | Construction | 2024 |
| STS Impex Limited | Wholesale & retail | 2025 |
| STS1 Services Ltd | Construction | 2025 |
| Student Coalition Ltd | Professional & scientific | 2013 |
| Studio 36 London Ltd | Arts & recreation | 2022 |
| Studio by KSS Ltd | Manufacturing | 2015 |
| Studio Edition Ltd | Construction | 2015 |
| Style Accessories Ltd | Wholesale & retail | 2019 |
| Style Contractors Ltd | Construction | 2024 |
| Style Inn Tailor Limited | Manufacturing | 2010 |
| Style Southall Ltd | Wholesale & retail | 2014 |
| Style Spark Creation Ltd | Wholesale & retail | 2026 |
| Stylish Boutique Limited | Wholesale & retail | 2016 |
| Stylo Saloon Limited | Other services | 2016 |
| Stylux Traders Limited | Wholesale & retail | 2001 |
| Suavear Customs Ltd | Professional & scientific | 2024 |
| Suaver Holdings Ltd | Real estate | 2025 |
| Suba Motors Ltd | Wholesale & retail | 2025 |
| Subari Ltd | Information & communication | 2016 |
| Subkha Construction Ltd | Administrative & support | 2018 |
| Sugfab Corporation Limited | Wholesale & retail | 2025 |
| SUI Thaga Ltd | Wholesale & retail | 2023 |
| Sukh Express Ltd | Transport & logistics | 2022 |
| Sukh Investment Limited | Real estate | 2024 |
| Sukh Properties UK Limited | Real estate | 2024 |
| Sukh Roofing and Construction Ltd | Construction | 2014 |
| Sukha Construction Ltd | Construction | 2018 |
| Sukhchain Construction Ltd | Construction | 2025 |
| Sukhh Properties Limited | Real estate | 2025 |
| Sukhleenr Land Property Ltd | Construction | 2025 |
| Sukhmani Properties Ltd | Real estate | 2023 |
| Sukhwant Services Limited | Construction | 2025 |
| Sukraj Ltd | Real estate | 2017 |
| Sultan Food & More Ltd | Hospitality | 2023 |
| Sultan Imports & Exports Ltd | Wholesale & retail | 2024 |
| Sultan Juice & More Ltd | Hospitality | 2024 |
| Sumak Consultancy Ltd | Other services | 2024 |
| Suman Building Workds Limited | Construction | 2026 |
| Sumati Design Hub Limited | Professional & scientific | 2018 |
| Sumit Kumar Bain Ltd | Construction | 2025 |
| Sumo Plumbing & Heating Ltd | Construction | 2025 |
| Sun Star Global Ltd | Wholesale & retail | 2022 |
| Sunaiya Travels Limited | Real estate | 2024 |
| Sund Investments Ltd | Real estate | 2011 |
| Sundeep Properties Ltd | Real estate | 2024 |
| Sunderdass Holding Limited | Extraterritorial | 1994 |
| Suneez Ltd | Health & social care | 2022 |
| Sunil Sharma Ltd | Construction | 2021 |
| Sunkrish Limited | Administrative & support | 2025 |
| Sunmeet Ltd | Wholesale & retail | 2023 |
| Sunny Bhatia Limited | Administrative & support | 2020 |
| Sunny Bodywork Limited | Wholesale & retail | 2019 |
| Sunny Double Glazing Ltd | Construction | 2008 |
| Sunny Eco Ltd | Construction | 2019 |
| Sunny Enterprises Limited | Wholesale & retail | 2002 |
| Sunny Fresh Global Trading Limited | Wholesale & retail | 2014 |
| Sunny Glazing Ltd | Construction | 2021 |
| Sunny Heer Ltd | Construction | 2016 |
| Sunny J Constructions Ltd | Construction | 2024 |
| Sunny Property Investment Ltd | Real estate | 2017 |
| Sunny Specialist Cars Ltd | Administrative & support | 2026 |
| Sunny.R Bathroom & Plumbing Ltd | Construction | 2023 |
| Sunplee Ltd | Hospitality | 2008 |
| Sunrise Realty Ltd | Real estate | 2023 |
| Sunrise Roofing & Building Limited | Construction | 2008 |
| Sunrise Transport UK Limited | Transport & logistics | 2013 |
| Sunway Properties Ltd | Real estate | 2021 |
| Super ALL Services Limited | Hospitality | 2025 |
| Super Mesh Ltd | Wholesale & retail | 2023 |
| Super Sharp Steel Ltd | Wholesale & retail | 2020 |
| Super Southall Quality Food Limited | Wholesale & retail | 2025 |
| Supertech Construction Ltd | Construction | 2022 |
| Supper Commerce Limited | Wholesale & retail | 2024 |
| Supply and Fit Windows Limited | Construction | 2009 |
| Supreme Guarding Limited | Administrative & support | 2025 |
| Supreme K9 Security Limited | Administrative & support | 2023 |