| SUP Deals Ltd | Wholesale & retail | 2024 |
| Supplies for Candles Limited | Manufacturing | 2012 |
| Supported Housing Consultants Limited | Financial services | 2017 |
| Swann Electrical Limited | Construction | 2015 |
| Sweethome Rentals Limited | Real estate | 2025 |
| Swinmex (Yorkshire) Limited | Wholesale & retail | 2014 |
| Swinton Community Sports Ground Trust Limited | Administrative & support | 2017 |
| Swinton E.A.L Limited | Wholesale & retail | 2025 |
| Swinton Fast Foods Ltd | Hospitality | 2021 |
| Swinton Masonic Hall Company,Limited | Other services | 1921 |
| Swinton MOT Centre Limited | Wholesale & retail | 2016 |
| Swinton Supercut Limited | Other services | 2025 |
| Swinton Tyres & Precision Powder Coating Ltd | Wholesale & retail | 2023 |
| Switchgear Maintenance (Distribution) Limited | Manufacturing | 1978 |
| SY Secure Limited | Construction | 2019 |
| Sykes Engineering Solutions Ltd | Manufacturing | 2023 |
| Symphony Fires Limited | Manufacturing | 2022 |
| Sysco Holdings Ltd | Professional & scientific | 2025 |
| Szekely Ionut Ltd | Transport & logistics | 2017 |
| T & J North Pubco Ltd | Hospitality | 2024 |
| T a Magnets Limited | Professional & scientific | 2020 |
| T D Riggings (Leeds) Ltd | Construction | 2024 |
| T Dawson Property Limited | Real estate | 2025 |
| T Limer Holdings Limited | Financial services | 2023 |
| T.Coy Electrical Ltd | Construction | 2024 |
| TAG Site Services (Southern) Ltd | Construction | 2011 |
| TAG Site Services Group Limited | Real estate | 2019 |
| TAI LEE House Limited | Hospitality | 2022 |
| Taig’S Property Ltd | Real estate | 2024 |
| Tarff Services Ltd | Professional & scientific | 2025 |
| Taste of China Takeout Limited | Hospitality | 2026 |
| Tasty Curry House Ltd | Hospitality | 2025 |
| Tbbt Projects Limited | Construction | 2026 |
| Techygrid Limited | Wholesale & retail | 2024 |
| Teekeys Autos Ltd | Wholesale & retail | 2024 |
| Terry Huggett Developments Ltd | Construction | 2011 |
| Tess Daly Ltd | Other services | 2021 |
| TFA Construction Limited | Construction | 2025 |
| TGB Sheds Europe Limited | Manufacturing | 2010 |
| TGB Sheds Limited | Manufacturing | 2010 |
| TGB Sheds Worldwide Limited | Manufacturing | 2010 |
| THE Alishan Restaurant Ltd | Hospitality | 2024 |
| THE Best Convenience Ltd | Wholesale & retail | 2021 |
| THE Big Q Group Ltd | Information & communication | 2016 |
| THE Castle Court Showroom Ltd | Wholesale & retail | 2026 |
| THE Company of Master Barbers Limited | Other services | 2014 |
| THE Crumbs Diner Swinton Ltd | Hospitality | 2025 |
| THE Edwardian Bedding Company Ltd. | Wholesale & retail | 2014 |
| THE Elite Fixers Club Ltd | Administrative & support | 2024 |
| THE Fitness Truck Limited | Arts & recreation | 2016 |
| THE Game of Business Limited | Professional & scientific | 2021 |
| THE Gym Bar & Venue Ltd | Hospitality | 2021 |
| THE House of Iron Limited | Arts & recreation | 2025 |
| THE Iceman Foundation CIC | Education | 2023 |
| THE Kilnhurst Action Group Community Resource Centre Limited | Other services | 1995 |
| THE Landuu Company Ltd | Other services | 2017 |
| THE Letwork Ltd | Real estate | 2020 |
| THE Lighting Vault Ltd | Wholesale & retail | 2019 |
| THE Little Town of Play (Batley) Ltd | Arts & recreation | 2022 |
| THE Little Town of Play Ltd | Arts & recreation | 2019 |
| THE Lovely Little Toy Shop Limited | Wholesale & retail | 2019 |
| THE Mexborough Old Brewery Limited | Real estate | 2001 |
| THE Octopus Group Ltd. | Administrative & support | 2016 |
| THE Soap Kitchen Limited | Wholesale & retail | 2011 |
| THE Spires (Austrey) LLP | | 2019 |
| THE Thriving & Development Company Limited | Education | 2025 |
| THE Trustees Office Limited | Financial services | 2013 |
| THE Uppercrust Sandwich Bar Ltd | Hospitality | 2024 |
| THE Yorkshire Wine Company Limited | Extraterritorial | 2006 |
| THE2JOHNNIES Ltd | Hospitality | 2021 |
| Thirlwell & Co Accountants Limited | Professional & scientific | 2023 |
| Thornton LEE Limited | Professional & scientific | 2016 |
| Thrive Disability Day Care Limited | Health & social care | 2024 |
| Tickhill Roofing Limited | Construction | 2002 |
| Tidi Services Limited | Health & social care | 2024 |
| Timaco Ltd | Transport & logistics | 2017 |
| Time Capsule Solution Ltd | Wholesale & retail | 2025 |
| Timmings Chris TM Ltd | Construction | 2024 |
| Timmings TM Ltd | Construction | 2023 |
| Tiny Tots Day Nursery (Rotherham) Ltd | Health & social care | 2013 |
| Tippett Properties Limited | Real estate | 2018 |
| Tlzee Limited | Other services | 2023 |
| TOM Bull Ltd | Transport & logistics | 2025 |
| Tommy's Bar (Mexborough) Limited | Hospitality | 2019 |
| Tomsam Limited | Real estate | 2006 |
| Top Line Building Services Limited | Construction | 2025 |
| Torqtraction Limited | Professional & scientific | 2026 |
| Total Safety & Environmental Solutions Ltd | Professional & scientific | 2011 |
| TR Clinical Services Ltd | Professional & scientific | 2017 |
| Trade Expo Limited | Wholesale & retail | 2024 |
| Trade Hub App Ltd | Information & communication | 2026 |
| Transit Solutions Ltd | Professional & scientific | 2025 |
| Travel Empire Limited | Administrative & support | 2007 |
| Treebit Enterprise Ltd | Wholesale & retail | 2019 |
| Trelancrest Developments Limited | Real estate | 1998 |
| Trims Building Products Limited | Wholesale & retail | 2010 |
| Trivium Group Holdings Ltd | Financial services | 2026 |
| Trivium Property Ltd | Real estate | 2026 |
| Trix Limited | Construction | 1997 |
| Truckdriving Limited | Wholesale & retail | 2015 |