| Smart Gadgets Hinckley Ltd | Wholesale & retail | 2022 |
| Smart Home Finance Limited | Financial services | 2020 |
| Smart Repairs (Midlands) Ltd | Wholesale & retail | 2025 |
| Smartfix (Hinckley) Limited | Construction | 2020 |
| Smith Performance Ltd | Professional & scientific | 2025 |
| Smith Styling Ltd | Professional & scientific | 2024 |
| SMJ Ventures Ltd | Professional & scientific | 2024 |
| SMW Engineering Solutions Ltd | Professional & scientific | 2023 |
| Snap Gear Rentals Limited | Administrative & support | 2025 |
| SNR Inc Ltd | Wholesale & retail | 2011 |
| SNR Autos & Tyres Ltd | Wholesale & retail | 2023 |
| Solanki Casinos Limited | Extraterritorial | 2021 |
| Solanki Holdings Limited | Financial services | 2019 |
| Solar HQ Limited | Administrative & support | 2022 |
| Solv Talent Ltd | Administrative & support | 2025 |
| Somerton Holdings Ltd | Real estate | 2026 |
| Sororibus Ltd | Wholesale & retail | 2013 |
| Soundworks PA Hire Limited | Administrative & support | 2025 |
| Sourced by Alice Limited | Wholesale & retail | 2024 |
| Sov-Ex Limited | Other services | 2025 |
| Spa Gardens (Hinckley) Limited | Other services | 2015 |
| Span Technical Services Ltd | Hospitality | 2022 |
| Sparkenhoe Business Centre Limited | Other services | 1984 |
| Spartans Kickboxing Limited | Arts & recreation | 2020 |
| Speak Better English Limited | Education | 2017 |
| SPEAKEASY@48 Limited | Hospitality | 2017 |
| Specialist Commissioning Engineers Limited | Professional & scientific | 2018 |
| Spectre Complete Construction Ltd | Construction | 2025 |
| Speed Parcel Limited | Transport & logistics | 2016 |
| Speedline Models Ltd | Manufacturing | 2023 |
| Spellbox Limited | Manufacturing | 2022 |
| Spencer Equestrian Ltd | Wholesale & retail | 2024 |
| Spica Transport Ltd | Transport & logistics | 2024 |
| Spices 7 Limited | Hospitality | 2019 |
| Spirit 10 Limited | Real estate | 2006 |
| Spirit 110 Limited | Real estate | 2006 |
| Spirit 120 Limited | Real estate | 2006 |
| Spirit 150 Limited | Real estate | 2006 |
| Spirit 170 Limited | Real estate | 2006 |
| Spirit 200 Limited | Real estate | 2006 |
| Spirit 210 Limited | Real estate | 2007 |
| Spirit 30 Limited | Real estate | 2006 |
| Spirit 300 Limited | Real estate | 2006 |
| Spirit 33 Limited | Real estate | 1996 |
| Spirit 40 Limited | Real estate | 2006 |
| Spirit 50 Limited | Real estate | 2006 |
| Spirit 60 Limited | Real estate | 2006 |
| Spirit 70 Limited | Real estate | 2006 |
| Spirit 80 Limited | Real estate | 2006 |
| Spirit 90 Limited | Real estate | 2006 |
| SPL Logistics UK Holdings Limited | Financial services | 2012 |
| Sports and Leisure Management Ltd | Arts & recreation | 1987 |
| Spotty Dog Communications Ltd | Professional & scientific | 2010 |
| SPR Tiling and Plumbing Limited | Construction | 2015 |
| Springbourne Hornsey Rise Limited | Construction | 2018 |
| Spro Solutions Ltd | Construction | 2025 |
| Ssergiu Ltd | Construction | 2025 |
| Sstl Investments Ltd | Real estate | 2019 |
| SSV Limited | Information & communication | 2005 |
| SSV Trustee Ltd | Professional & scientific | 2026 |
| ST Bernards Day Nursery Ltd | Education | 2014 |
| ST Francis Close Hinckley (Management) Company Limited | Households | 2013 |
| ST Johns Self Storage Limited | Other services | 1951 |
| ST Mary's Park (Management Company) Limited | Households | 2010 |
| ST Wills Limited | Wholesale & retail | 2022 |
| Stacha Healthcare Limited | Health & social care | 2021 |
| Stand Sure Protection Ltd | Administrative & support | 2025 |
| Stefan Bailey Ltd | Manufacturing | 2018 |
| Stephen Ghent Consultancy Ltd | Professional & scientific | 2007 |
| Steve Brookes Electrical Ltd | Construction | 2026 |
| Stigner Studio Limited | Professional & scientific | 2025 |
| Stipers Hill Farm Limited | Agriculture & fishing | 2026 |
| Stone and Sage Homes Ltd | Real estate | 2025 |
| Stonehill Court Management Company Limited | Households | 1975 |
| Stoney Stanton Food Bank | Other services | 2023 |
| Storage Systems Installation Ltd | Construction | 2020 |
| Strajex Technologies Limited | Financial services | 2020 |
| Strong Electrical Services Ltd | Construction | 2020 |
| Stronger Humans Coaching and Consulting Limited | Professional & scientific | 2023 |
| Stuart Plumbing & Heating Supplies Limited | Wholesale & retail | 2002 |
| Studio Flow Hinckley Ltd | Arts & recreation | 2024 |
| Studio Stamp Ltd | Other services | 2023 |
| Sturmark Construction Ltd | Construction | 2013 |
| Stylepraise Limited | Transport & logistics | 1991 |
| Suataco Ltd | Hospitality | 2021 |
| Subscope Surveys Limited | Professional & scientific | 2026 |
| Summer Dreamzz Ltd | Real estate | 2025 |
| Summitstone Asset Management Limited | Real estate | 2023 |
| Sunloch Consulting Limited | Professional & scientific | 2026 |
| SUNNY24 Ltd | Wholesale & retail | 2023 |
| Supply Chain Optimisation Ltd | Professional & scientific | 2022 |
| Supreme Team UK Ltd. | Administrative & support | 2009 |
| Supreme Valeting and Supplies Limited | Wholesale & retail | 2025 |
| SVS Accountancy Limited | Professional & scientific | 2022 |
| Swanswell Property Two Ltd | Real estate | 2026 |
| Swift Homes (Holdings) Limited | Real estate | 2020 |
| Swinfen Catering Meats Limited | Manufacturing | 2001 |
| Swinnerton Machinery Limited | Wholesale & retail | 2014 |
| SWK Brickwork Ltd | Construction | 2022 |
| Sycamore Properties (2025) Limited | Other services | 2017 |