| Stromboli & SON Limited | Real estate | 2024 |
| Studio 360 Interiors Ltd | Manufacturing | 2025 |
| Studio 80 Art Ltd | Professional & scientific | 2020 |
| Studio Happier Ltd | Professional & scientific | 2024 |
| Stunning Imagination Media Limited | Information & communication | 2026 |
| Sturdy Sittings & Beds Ltd | Other services | 2024 |
| Style Beds Ltd | Manufacturing | 2025 |
| Styled by AU Ltd | Wholesale & retail | 2025 |
| Sublime Holding Ltd | Financial services | 2020 |
| Sueno Beds Limited | Manufacturing | 2015 |
| SUH Investment Ltd | Financial services | 2025 |
| Suhayl Solutions Ltd | Financial services | 2017 |
| Suitable for Ltd | Information & communication | 2013 |
| SUK 695 Couriers Ltd | Transport & logistics | 2013 |
| Sully Trades Limited | Wholesale & retail | 2025 |
| Sultopia Design Ltd | Information & communication | 2020 |
| Summit Traders Limited | Wholesale & retail | 2023 |
| Sunny Hill Locums Ltd | Health & social care | 2025 |
| Sunny's Foods & Booze Ltd | Wholesale & retail | 2016 |
| Sunnybank Estates Limited | Real estate | 2021 |
| Sunshine Luxury Hand Carwash Ltd | Administrative & support | 2025 |
| Super Petroleum Limited | Wholesale & retail | 2018 |
| Superior Gold Traders Ltd | Manufacturing | 2021 |
| Superior Motor Company Limited | Wholesale & retail | 2017 |
| Suplex Systems Ltd | Wholesale & retail | 2026 |
| Supply Outlet Ltd | Wholesale & retail | 2020 |
| Supreme Herbal Solutions Ltd | Wholesale & retail | 2025 |
| Supreme Logistic Services Ltd | Transport & logistics | 2019 |
| Supreme Mathematica Limited | Other services | 2024 |
| Surge Care Limited | Administrative & support | 2022 |
| Surgeons Hall Limited | Administrative & support | 2020 |
| Sussex Style Limited | Construction | 2020 |
| Sutcliffe Social Care Associates Limited | Health & social care | 2023 |
| Sutra Designs Ltd | Manufacturing | 2022 |
| Suzanne Clarke Accountancy Ltd | Professional & scientific | 2010 |
| SW Projects Limited | Health & social care | 2021 |
| Swaledale Foods (Leeds) Ltd | Hospitality | 2024 |
| Sweatbox Fitness Studio Limited | Arts & recreation | 2021 |
| Sweendog Pipework Solutions Limited | Manufacturing | 2026 |
| Sweet Stop Dewsbury Ltd | Wholesale & retail | 2022 |
| Sweet Vibez Ltd | Wholesale & retail | 2024 |
| Sweetpea Promotions Limited | Administrative & support | 2014 |
| Sweets Direct (Yorkshire) Ltd | Wholesale & retail | 2014 |
| Sweetsandshakes Ltd | Hospitality | 2025 |
| Sweven Auto Limited | Wholesale & retail | 2018 |
| Swift Cars (Yorkshire) Ltd | Transport & logistics | 2017 |
| Swift Drive Rental Ltd | Administrative & support | 2026 |
| Swift Prime Holdings Ltd | Real estate | 2024 |
| Swiftconstruct Ltd | Construction | 2025 |
| Swiftsprint Ltd | Transport & logistics | 2025 |
| Swirls Desserts Ltd | Hospitality | 2025 |
| Switch House Limited | Real estate | 2003 |
| Switchlegal Ltd | Professional & scientific | 2026 |
| SY ECA Assist Ltd | Health & social care | 2016 |
| SY Travel Ltd | Administrative & support | 2024 |
| Syke Properties Ltd | Real estate | 2003 |
| Synergy Solicitors Limited | Administrative & support | 2016 |
| Synergy Therapeutic Care Limited | Health & social care | 2026 |
| Synr Investments Limited | Real estate | 2026 |
| SZZ Ltd | Professional & scientific | 2017 |
| T & K Beds Ltd | Wholesale & retail | 2021 |
| T & N Locums Ltd | Health & social care | 2025 |
| T & Z Real Estate Limited | Real estate | 2023 |
| T H MIR Ltd | Health & social care | 2010 |
| T I Foods Ltd | Hospitality | 2016 |
| T J K Brown Properties Limited | Households | 2021 |
| T Storage Limited | Transport & logistics | 2025 |
| T.E.A.M B Driver Supplier Limited | Administrative & support | 2015 |
| T.M Holdings (U.K) Ltd | Real estate | 2019 |
| T.M Precision Furniture Assembly Ltd | Construction | 2025 |
| Taffy IT Services Ltd | Information & communication | 2020 |
| TAG Truck Exports Limited | Wholesale & retail | 2014 |
| Tagh Group Limited | Information & communication | 2021 |
| TAI LEE Hong Limited | Wholesale & retail | 2019 |
| Talos Engineering UK Ltd | Manufacturing | 2023 |
| Talos Vehicles Ltd | Manufacturing | 2016 |
| Tapz Tiling and Plumbing Services Ltd | Construction | 2025 |
| Tarantula Room Limited | Wholesale & retail | 2020 |
| Tastebuds(Uk) Ltd | Hospitality | 2019 |
| Tattersfield Holdings Limited | Health & social care | 2025 |
| Tawakal AL Madina Ltd | Administrative & support | 2024 |
| Taxcount Ltd. | Professional & scientific | 2019 |
| Taxi Trader (UK) Ltd | Professional & scientific | 2014 |
| Taylor 56 Limited | Information & communication | 2013 |
| Taylor BSK Limited | Real estate | 2023 |
| Taylor Burton UK Ltd | Manufacturing | 2018 |
| Taylor Retail Limited | Wholesale & retail | 2025 |
| Taylor Specialist Fasteners Ltd | Manufacturing | 2022 |
| TBG ENT Ltd | Wholesale & retail | 2024 |
| TCT FAM Ltd | Health & social care | 2015 |
| Team Agoge Limited | Arts & recreation | 2023 |
| Team Wrigg Ltd | Extraterritorial | 2014 |
| Tech 2000 Ltd | Manufacturing | 2025 |
| Tech Co Group Limited | Wholesale & retail | 2021 |
| Tech Iteasy Limited | Information & communication | 2006 |
| Tech Treasures Ltd | Wholesale & retail | 2024 |
| Techdynamo Limited | Information & communication | 2014 |
| Techyourtime Ltd | Wholesale & retail | 2026 |
| Teelo Beds Ltd | Wholesale & retail | 2026 |
| Teema African and Caribbean Stores Ltd | Wholesale & retail | 2025 |