| SW Business Consultancy Limited | Administrative & support | 2025 |
| SW Plumbing & GAS Limited | Construction | 2017 |
| SW1 Foods Limited | Manufacturing | 2023 |
| Swades Beauty Ltd | Other services | 2023 |
| Swains Property LLP | | 2012 |
| Swan Products Limited | Wholesale & retail | 2008 |
| Swann Beauty Asthetics Limited | Other services | 2013 |
| Swattup Limited | Information & communication | 2017 |
| Swayline Limited | Professional & scientific | 2004 |
| Sweeney & Jones Properties Ltd | Real estate | 2026 |
| Sweepix Limited | Administrative & support | 2024 |
| Sweet & Spice Limited | Wholesale & retail | 2015 |
| Sweet Elohim Afro Market (Stoke) Ltd | Wholesale & retail | 2025 |
| Sweet Hotspot Stoke Ltd | Hospitality | 2024 |
| Sweet Moments Stoke Ltd | Hospitality | 2020 |
| Sweet Shop ( Tunstall) Ltd | Hospitality | 2026 |
| Sweet Sugaring Limited | Other services | 2025 |
| Sweet Two Limited | Hospitality | 2019 |
| Sweetnup Ltd | Wholesale & retail | 2025 |
| Swift Active Solutions Ltd | Professional & scientific | 2018 |
| Swift Domestics Limited | Construction | 2017 |
| Swift Electrical Contractors Limited | Construction | 2014 |
| Swift Mechanical Services Limited | Construction | 2019 |
| Swift Response Property Maintenance Ltd | Construction | 2023 |
| Swift Self Drive & SCL Hire Limited | Transport & logistics | 2019 |
| Swiftbloc Limited | Information & communication | 2025 |
| Swiftys Microbar Limited | Hospitality | 2022 |
| Swinnerton Group Ltd | Financial services | 2024 |
| Swoop Vending Ltd | Wholesale & retail | 2025 |
| SWRB4 Ltd | Real estate | 2025 |
| Swyft Drop Limited | Wholesale & retail | 2024 |
| Syben Holdings Limited | Real estate | 2024 |
| SYC Distribution Limited | Wholesale & retail | 2024 |
| Sycora Ltd | Information & communication | 2016 |
| Sydney Heath & SON Ltd. | Manufacturing | 1992 |
| Syeda Holdings Limited | Real estate | 2024 |
| Syedtech & Consultancy Ltd | Wholesale & retail | 2018 |
| Syensed Techcom Ltd | Construction | 2022 |
| Sygmo Ltd | Real estate | 2020 |
| Sylan Limited | Administrative & support | 2019 |
| Sylvan Motors Ltd | Wholesale & retail | 2018 |
| Sylvia Rose Holdings Limited | Financial services | 2022 |
| Symmetrical | Health & social care | 2021 |
| Symphony General Investments Limited | Financial services | 2020 |
| Synapticworks Ltd | Information & communication | 2026 |
| Synchroplicity Holdings Limited | Financial services | 2019 |
| Synchroplicity Investments Limited | Construction | 2019 |
| Synchroplicity Limited | Hospitality | 2018 |
| Synchroplicity Sourcing Limited | Real estate | 2020 |
| Synectics Solutions (Holdings) Limited | Financial services | 2023 |
| Synectics Solutions Limited | Information & communication | 1992 |
| Synergised Research Limited | Wholesale & retail | 2026 |
| Synergy 313 Limited | Information & communication | 2026 |
| Synergy Capital Group Limited | Financial services | 2025 |
| Synergy Care Holdings Ltd | Public administration | 2025 |
| Synergy Environmental Solutions Limited | Manufacturing | 2012 |
| Synergy Equipment Solutions Limited | Administrative & support | 2012 |
| Synergy Laundrette Services Ltd | Administrative & support | 2025 |
| Synergy Management Services Ltd | Real estate | 2024 |
| Synergy Mobile Applications Ltd | Professional & scientific | 2025 |
| Synergy Property Solutions Limited | Real estate | 2022 |
| Synergy Research Laboratories Ltd | Wholesale & retail | 2026 |
| Synergy Structures Ltd | Construction | 2022 |
| Synrgy Estates Limited | Real estate | 2025 |
| Syntaggo Ltd | Information & communication | 2026 |
| Syscraft Ltd | Construction | 2021 |
| Systems Technology Consultants Limited | Information & communication | 1997 |
| Sytech Netshield Limited | Information & communication | 2020 |
| Syzygy+ Limited | Information & communication | 2011 |
| Szeftrans Ltd | Transport & logistics | 2017 |
| Szemraj Weld Ltd | Manufacturing | 2020 |
| T & a Window Cleaning Ltd | Administrative & support | 2026 |
| T & E Cottrell Ltd | Real estate | 2023 |
| T & G Bridges Ltd | Other services | 2022 |
| T & J Building Construction UK Ltd | Financial services | 2025 |
| T & S Plastering Ltd | Administrative & support | 2002 |
| T & S Properties(Uk) Ltd | Construction | 2019 |
| T and H Ventures Limited | Construction | 2025 |
| T Baddeley Ltd | Construction | 2008 |
| T Brindley Carpets Limited | Wholesale & retail | 2010 |
| T I Carpet & Flooring Ltd | Construction | 2015 |
| T Ryard Limited | | 1979 |
| T Swinson & Partners Limited | Agriculture & fishing | 2002 |
| T Times Two Ltd. | Wholesale & retail | 1997 |
| T Vousden Holdings Ltd | Financial services | 2025 |
| T Vousden Property Company One Ltd | Real estate | 2026 |
| T Vousden Property Holdings Ltd | Real estate | 2026 |
| T W Decorators Limited | Construction | 2008 |
| T&L Mega-Trans Ltd | Other services | 2013 |
| T&Liu Limited | Hospitality | 2024 |
| T&P Catering Limited | Hospitality | 2025 |
| T&S Construction Stoke Ltd | Construction | 2019 |
| T&S E-Commerce Ltd | Wholesale & retail | 2025 |
| T&S Trade Group Ltd | Wholesale & retail | 2025 |
| T&T Architectural Design Ltd | Professional & scientific | 2019 |
| T-Ips Construction and Plant Hire Limited | Administrative & support | 2023 |
| T-Ips Fire Protection Ltd | Construction | 2026 |
| T-Ips Holdings Limited | Financial services | 2020 |
| T-Ips Interiors Limited | Manufacturing | 2021 |
| T-Saf Ltd | Wholesale & retail | 2015 |