| Steve Griggs Painting Contractors Limited | Construction | 2006 |
| Steve Sherwood Graphics Limited | Professional & scientific | 2012 |
| Stevemore Ltd | Administrative & support | 2021 |
| Steven Yardley Furniture Maker Ltd | Manufacturing | 2009 |
| Steward Associates Ltd. | Professional & scientific | 2003 |
| Stewart & Co Commercial Limited | Real estate | 2023 |
| Stewart & Co Estates Limited | Real estate | 2013 |
| Stewart Capital Ltd | Financial services | 2020 |
| Stewart Prior Properties Ltd | Real estate | 2020 |
| Sticks & Steak Ltd | Hospitality | 2026 |
| Still Moving Consultancy Ltd | Professional & scientific | 2013 |
| Stillsky Ltd | Information & communication | 2026 |
| Stinga Property Management Group Ltd | Construction | 2025 |
| Stingo Styles Limited | Wholesale & retail | 2017 |
| Stingray Marine Limited | Extraterritorial | 2003 |
| Stitch Films Ltd | Information & communication | 2019 |
| STJ Grosvenor Limited | Administrative & support | 2010 |
| STJ Property Services Ltd | Administrative & support | 2024 |
| STM CLO Ltd | Wholesale & retail | 2024 |
| STM Consultancy Services Limited | Information & communication | 2024 |
| Stndrd Clothing Ltd | Wholesale & retail | 2026 |
| Stoater Property Consults Ltd | Real estate | 2022 |
| Stoater Property Limited | Real estate | 2021 |
| Stocj & Sons Limited | Health & social care | 2020 |
| Stoiu Limited | Transport & logistics | 2019 |
| Stolon Studio Ltd | Professional & scientific | 2016 |
| Stone ARC Co Ltd | Construction | 2023 |
| Stone City Traders Ltd | Wholesale & retail | 2024 |
| Stone Paving Services Ltd | Water & waste | 2019 |
| Stonehaven Consultancy Limited | Manufacturing | 2026 |
| Stonevail Ltd | Construction | 2025 |
| Stoneworks & Maintenance Ltd | Construction | 2013 |
| Stonki Transport Ltd | Transport & logistics | 2025 |
| Stony Construction Limited | Construction | 2025 |
| Stop N Munch Limited | Hospitality | 2023 |
| Store Bought Solutions Ltd | Wholesale & retail | 2024 |
| Storecentral Limited | Wholesale & retail | 2023 |
| Storestop Ltd | Wholesale & retail | 2024 |
| Storky Baby Limited | Wholesale & retail | 2022 |
| Storky Limited | Wholesale & retail | 2022 |
| Storm in a Teapot Ltd | Hospitality | 2021 |
| Storm Legion Holdings Ltd | Professional & scientific | 2024 |
| Storm Tech Roofing Specialist Limited | Construction | 2025 |
| Stormproofing(Uk) Ltd | Construction | 2021 |
| Stow Car Company Limited | Wholesale & retail | 2016 |
| Stoxfood Limited | Administrative & support | 2013 |
| Stoya Consulting Limited | Professional & scientific | 2016 |
| Strada Ventures and Consultancy Limited | Professional & scientific | 2022 |
| Straight Road Nursery Limited | Education | 2022 |
| Straightup Collections Limited | Wholesale & retail | 2026 |
| Strandz Salon Ltd | Other services | 2015 |
| Strangeways Collective Limited | Other services | 2022 |
| Strata Commercial Insight Limited | Professional & scientific | 2026 |
| Stratai Limited | Information & communication | 2026 |
| Strategize Visionaries Ltd | Professional & scientific | 2021 |
| Strategy Studio LKC Ltd | Professional & scientific | 2022 |
| Stratford Compliance Ltd | Professional & scientific | 2024 |
| Stratton Oakmant Limited | Professional & scientific | 2025 |
| Stratus Buildcorp Ltd | Construction | 2025 |
| Streamline Finance Advisers Ltd | Professional & scientific | 2026 |
| Streamline Rendering and Building Services Ltd | Construction | 2018 |
| Streamline Services Consultancy Limited | Administrative & support | 2004 |
| Streampick Ltd | Information & communication | 2026 |
| Streamtek Limited | Construction | 2001 |
| Street Grub Limited | Hospitality | 2025 |
| Street Kebab Ltd | Hospitality | 2023 |
| Street Properties London Ltd | Construction | 2019 |
| Strength Healthcare Group Ltd | Public administration | 2021 |
| Strength in Mind CIC | Education | 2026 |
| Strength of a Queen CIC | Professional & scientific | 2024 |
| Stressless Sleeping Ltd | Real estate | 2025 |
| Strings of Fire Ltd | Arts & recreation | 2019 |
| Strip 'N' Fit Limited | Construction | 2009 |
| Strivor Sports Academy Ltd | Arts & recreation | 2025 |
| Strong Tower Supported Living Ltd | Health & social care | 2023 |
| Strongbones Children's Charitable Trust | Health & social care | 2001 |
| Stronghold Rentals Ltd | Administrative & support | 2025 |
| Structix Ltd | Construction | 2025 |
| Structural Membranes (Holding) Limited | Financial services | 2019 |
| Structural Membranes Specialists Limited | Construction | 1990 |
| Strutfix Ltd | Wholesale & retail | 2025 |
| STS Global Enterprises Ltd | Wholesale & retail | 2025 |
| STS Trade Ltd | Construction | 2020 |
| STS Welding Services Ltd | Construction | 2012 |
| Sttile Const Ltd | Construction | 2022 |
| Stuart Mckinnon Consulting Services Limited | Financial services | 2018 |
| Student Biryani(Uk) Limited | Hospitality | 2023 |
| Studify Ltd | Information & communication | 2024 |
| Studio 32 Consulting Ltd | Professional & scientific | 2020 |
| Studio 413 London Ltd | Wholesale & retail | 2024 |
| Studio @ Poole (Retail) Ltd | Wholesale & retail | 2017 |
| Studio Beach Ltd | Administrative & support | 2012 |
| Studio Dynostorm Limited | Information & communication | 2022 |
| Studio Gdcm Ltd | Professional & scientific | 2023 |
| Studio Geojam Ltd | Professional & scientific | 2024 |
| Studio Smith Architecture Limited | Professional & scientific | 2023 |
| Studio Verma Ltd | Professional & scientific | 2019 |
| STUDIO38.CLUB Ltd | Arts & recreation | 2024 |
| Studionation UK Ltd | Administrative & support | 2022 |
| Studium Consulting Ltd | Professional & scientific | 2020 |