| Suthan Property Ltd | Real estate | 2022 |
| Sutton Tools Original Limited | Wholesale & retail | 2017 |
| Sutton`S CA Limited | Professional & scientific | 2009 |
| Suzanne Meighan Ltd | Wholesale & retail | 2019 |
| SV Psychiatric Services Limited | Health & social care | 2026 |
| Svelta Ltd | Hospitality | 2026 |
| SW Cabinetry Ltd | Manufacturing | 2023 |
| SW Construction Consultancy Ltd | Professional & scientific | 2019 |
| SW Derby Limited | Wholesale & retail | 2022 |
| SW Plastering Ltd | Construction | 2026 |
| Swallow Consultancy Ltd | Information & communication | 2016 |
| Swann Electrical Contractors Ltd | Construction | 2020 |
| Swann Mortgage & Financial Services Ltd | Financial services | 2019 |
| Swannair Limited | Manufacturing | 2011 |
| Sweet Like Candy Limited | Wholesale & retail | 2022 |
| Sweet Tooth Creamery Ltd | Hospitality | 2021 |
| Sweet Treats & Gifts Ltd | Wholesale & retail | 2023 |
| Sweetpea & Pillow Properties Ltd | Real estate | 2023 |
| SWF Fire Stopping Services Ltd | Construction | 2015 |
| Swift Asset Services UK Ltd | Transport & logistics | 2016 |
| Swift Aura Ltd | Wholesale & retail | 2026 |
| Swift Bridge Payments Ltd | Administrative & support | 2026 |
| Swift Chef Ltd | Wholesale & retail | 2024 |
| Swift CNC Ltd | Manufacturing | 2025 |
| Swift Eagle Transport Ltd | Transport & logistics | 2023 |
| Swift Groundworks and Reinstatement Ltd | Construction | 2018 |
| Swift LEE Developments Limited | Construction | 2020 |
| Swift Properties (Rotherham) Limited | Hospitality | 2015 |
| Swift Rental Group Ltd | Administrative & support | 2024 |
| Swift Tailored Solutions Limited | Financial services | 2008 |
| Swift.Landscapes Ltd | Administrative & support | 2025 |
| Swiftcyc Limited | Professional & scientific | 2022 |
| Swiftfix Build Services Ltd | Construction | 2026 |
| Swifthaul Logistics Ltd | Water & waste | 2025 |
| Swiftsaver Imports Ltd | Other services | 2021 |
| Swiftx Logistics Limited | Transport & logistics | 2025 |
| Swinton Motors Yorkshire Ltd | Wholesale & retail | 2025 |
| Swinton Plastering Solutions Limited | Construction | 2016 |
| Swish Sales & Lettings Limited | Real estate | 2015 |
| Switch Mobility Limited | Manufacturing | 1984 |
| SWK (U.K.) Holding Limited | Professional & scientific | 2004 |
| SWK (UK) Limited | Professional & scientific | 2003 |
| SWW Trading and Training Services Ltd | Water & waste | 2023 |
| SY Cardiology Limited | Health & social care | 2019 |
| SY Groundworks Ltd | Construction | 2020 |
| SY Property Rental Limited | Real estate | 2025 |
| SY Residential Limited | Real estate | 2024 |
| Sycamore Transport Limited | Transport & logistics | 2006 |
| Syed Aviation Limited | Manufacturing | 2026 |
| Syed Wellness and Health Limited | Public administration | 2025 |
| SYG Partners Ltd | Construction | 2020 |
| Sygnature Dish Ltd | Hospitality | 2024 |
| Syic Ltd | Financial services | 2023 |
| Syil CNC UK Ltd | Manufacturing | 2024 |
| Sykes Travel Services Ltd | Administrative & support | 2018 |
| Sylvester Keal Holdings Limited | Extraterritorial | 2012 |
| SYM Market Ltd | Wholesale & retail | 2025 |
| Syme Music Publishing Co. Limited | Information & communication | 1995 |
| Symmetry Accounting Services Limited | Professional & scientific | 2018 |
| Syncarta Ltd | Information & communication | 2025 |
| Synchronous Machine Services Ltd | Manufacturing | 2018 |
| Synergy Care Solutions Limited | Health & social care | 2012 |
| Synergy Engineers Limited | Professional & scientific | 2019 |
| Synergy Gate Automation and Barriers Limited | Manufacturing | 2021 |
| Synergy Transport Ltd | Transport & logistics | 2023 |
| SZ Commercials Ltd | Real estate | 2025 |
| SZ Trade&Logistic Ltd | Water & waste | 2019 |
| Szybka Nauka Pro Ltd | Professional & scientific | 2015 |
| T & B Events and Touring Services Ltd | Hospitality | 2022 |
| T & G PUB Services Ltd | Professional & scientific | 2024 |
| T & M Bentley Ltd | Wholesale & retail | 2025 |
| T 4 I Limited | Administrative & support | 2017 |
| T and T Bookings Ltd | Wholesale & retail | 2026 |
| T Birks Construction Limited | Construction | 2018 |
| T Chalack Ltd | Professional & scientific | 2025 |
| T Gilroy Electrical Limited | Construction | 2019 |
| T H Bell Properties Ltd | Real estate | 2024 |
| T K L Plant Sales and Services Limited | Wholesale & retail | 1991 |
| T M Plumbing and Heating Services Limited | Construction | 2022 |
| T S Plumbing & Heating (Yorkshire) Limited | Construction | 2022 |
| T Yousaf Limited | Professional & scientific | 2016 |
| T&H Transport Yorkshire Limited | Transport & logistics | 2010 |
| T-Centrix UK Ltd | Wholesale & retail | 2004 |
| T. G. Commercials (South Yorkshire) Limited | Professional & scientific | 1984 |
| T. Wigley & SON BUS Limited | Water & waste | 2000 |
| T.D.C Services Ltd | Transport & logistics | 2026 |
| T.E.M.C. Services Ltd | Manufacturing | 2016 |
| T.I.S. Services Limited | Extraterritorial | 1987 |
| T.K. Lynskey (Excavations) Limited | Construction | 1965 |
| T.K.L. Demolition Services Limited | Extraterritorial | 2002 |
| T.M Interior Decoration Ltd | Health & social care | 2014 |
| T.S (Yorkshire) Ltd | Water & waste | 2018 |
| T.W DRY Lining Ltd | Construction | 2020 |
| T20 Utilities Ltd | Construction | 2021 |
| TA Repairs & Services Ltd | Manufacturing | 2023 |
| Ta&L Ltd | Construction | 2023 |
| Taag Chain Ltd | Hospitality | 2019 |
| Tabbard Limited | Hospitality | 2025 |
| Taboka Z PVT Ltd | Health & social care | 2017 |
| Tachara Food Ltd | Hospitality | 2022 |