| SV Construction Builds Ltd | Construction | 2026 |
| SV Content Creator Ltd | Professional & scientific | 2025 |
| SVB Medical Services Ltd | Health & social care | 2025 |
| SVC Publicity Limited | Professional & scientific | 2022 |
| SVM Coffee Limited | Hospitality | 2025 |
| SVZ (UK) Limited | Manufacturing | 1988 |
| Swallow Court (Grove Road West) Management Company Limited | Households | 1988 |
| Swallowtail Partners Ltd | Real estate | 2016 |
| Swap SH0P Gadgets Ltd | Wholesale & retail | 2021 |
| Sweet Bash Ltd | Wholesale & retail | 2012 |
| Sweet Confectionery Ltd | Manufacturing | 2013 |
| Sweet Home Mortgages Ltd | Financial services | 2009 |
| Sweet Melanin Limited | Public administration | 2021 |
| Sweet Regale Ltd | Hospitality | 2023 |
| Sweet Science Cookies Ltd | Manufacturing | 2024 |
| Sweetdent Ltd | Health & social care | 2019 |
| Swift Glazing Ltd | Construction | 2024 |
| Swift Nest Ltd | Information & communication | 2014 |
| Swift Orbit Ltd | Professional & scientific | 2026 |
| Swift Reach Ltd | Professional & scientific | 2024 |
| Swift Residential Services Ltd. | Real estate | 2005 |
| Swiftrush Limited | Wholesale & retail | 2025 |
| Swiftvault Ltd | Wholesale & retail | 2025 |
| Swinburne AV Ltd | Real estate | 2022 |
| Swinburne AV Management Ltd | Real estate | 2023 |
| Switch Fibre Ltd | Construction | 2025 |
| Switch Fleet Services Ltd | Wholesale & retail | 2020 |
| Switch Sourcing Services Ltd | Administrative & support | 2020 |
| Switch Van Rental & Lease Ltd | Administrative & support | 2021 |
| SWS Construction Group Ltd | Construction | 2018 |
| Swsd Ltd | Information & communication | 2021 |
| Sybonel Ltd | Wholesale & retail | 2025 |
| Syeb Plus Ltd | Professional & scientific | 2025 |
| Syed Quickcab Ltd | Transport & logistics | 2018 |
| Syed Asset Management Ltd | Real estate | 2026 |
| Syfa Impex Ltd | Wholesale & retail | 2018 |
| Syfer Ltd | Information & communication | 2022 |
| Syltech Autos Ltd | Wholesale & retail | 2021 |
| Sylvia Dobek Photography Ltd | Professional & scientific | 2018 |
| Sylwill Limited | Information & communication | 2024 |
| Synaptive Ltd | Professional & scientific | 2025 |
| Syncrocorp Limited | Wholesale & retail | 2017 |
| Synergy Housing Group Ltd | Real estate | 2024 |
| Synergy UK Food Supplies Ltd | Wholesale & retail | 2026 |
| Synthesis Real Estate Limited | Financial services | 2007 |
| Syot Solutions Ltd | Professional & scientific | 2013 |
| Syrian Coastal Society GB Ltd | Other services | 2025 |
| Systemin Ltd | Professional & scientific | 2015 |
| Systemise IT Ltd | Information & communication | 2021 |
| Syusler Service Ltd | Construction | 2021 |
| Szachu Limited | Transport & logistics | 2015 |
| T & E Investments Limited | Real estate | 2009 |
| T & K Asset Management Ltd | Real estate | 2025 |
| T & R South Ltd | Manufacturing | 2014 |
| T & T Nails and Spa Limited | Other services | 2025 |
| T B S Contractors Limited | Construction | 2009 |
| T Chiu Housing PVT Ltd | Real estate | 2017 |
| T G Food Centre Limited | Real estate | 2007 |
| T H Y Catering Ltd | Hospitality | 2024 |
| T Sadhu Limited | Professional & scientific | 2011 |
| T&A (VN) Limited | Other services | 2018 |
| T&C Beauty Limited | Other services | 2024 |
| T&J Nail Spa Limited | Other services | 2021 |
| T&K Beauty Premier Ltd | Wholesale & retail | 2026 |
| T&L Ruby Limited | Other services | 2024 |
| T&M Global International Ltd | Wholesale & retail | 2023 |
| T&R Real Estates Ltd | Real estate | 2025 |
| T&S Assets Limited | Real estate | 2025 |
| T&T Nails Erdington Limited | Other services | 2026 |
| T&V Projects Limited | Construction | 2016 |
| T' Beauty Company Limited | Other services | 2017 |
| T-Shirt Mania Ltd | Wholesale & retail | 2024 |
| T. Tazaki & Company Limited | Professional & scientific | 1974 |
| T.N.E Trade Limited | Administrative & support | 2010 |
| T10 Coding Ltd | Information & communication | 2025 |
| T10 Properties Ltd | Real estate | 2024 |
| T2 Building Services (Holdings) Ltd | Financial services | 2024 |
| T4H Ltd | Wholesale & retail | 2021 |
| TA Nails Limited | Other services | 2017 |
| TA Removals Limited | Transport & logistics | 2026 |
| TAB Security Services Ltd | Administrative & support | 2020 |
| Tables Ladders and Chairs Ltd | Wholesale & retail | 2026 |
| Tadim Doner Ltd | Wholesale & retail | 2025 |
| Tafa General Construction Ltd | Construction | 2025 |
| Tafani Brickwork Ltd | Construction | 2024 |
| Taff Chauffeurs Ltd | Transport & logistics | 2024 |
| TAG Foods Direct Limited | Professional & scientific | 2018 |
| Taguz Decoration Ltd | Construction | 2023 |
| Tahtakale Holding Ltd | Financial services | 2022 |
| Tahtakale Limited | Wholesale & retail | 2008 |
| Tahtakale Property Ltd | Real estate | 2013 |
| Tahtakale Trading UK Limited | Wholesale & retail | 2024 |
| Tahtakale Wholesale Limited | Wholesale & retail | 2024 |
| Taibron Investments Company Limited | Professional & scientific | 2020 |
| Tailored Care & Support Ltd | Health & social care | 2022 |
| Tailored Property Ltd. | Real estate | 2020 |
| TAJ Adegoke Ltd Limited | Information & communication | 2014 |
| Takan Limited | Hospitality | 2017 |
| Take Charge Eco Ltd | Construction | 2020 |
| Taksim Turkish Restaurant Ltd | Hospitality | 2026 |