| THE Spotlight Bar Ltd | Hospitality | 2026 |
| THE Stag Chiropody Clinic Limited | Health & social care | 2010 |
| THE Stewart Organisation Limited | Financial services | 2025 |
| THE Store From 1 Pound Ltd | Wholesale & retail | 2025 |
| THE Style Lounge (Yorkshire) Ltd | Other services | 2015 |
| THE Sukar Company Ltd | Wholesale & retail | 2020 |
| THE Sun BED (Rotherham) Limited | Other services | 2015 |
| THE Sunbed Shop (Sheff) Limited | Other services | 2024 |
| THE Survey Team Ltd | Construction | 2024 |
| THE Tamper Group Ltd | Hospitality | 2025 |
| THE Tanning Lounge (Swinton) Limited | Other services | 2022 |
| THE Tech Locker Ltd | Other services | 2023 |
| THE Timberyard Micro PUB Limited | Hospitality | 2021 |
| THE Tool Garage Ltd | Wholesale & retail | 2016 |
| THE Tracking Company (Group) Ltd | Administrative & support | 2017 |
| THE Transformation Universe Ltd | Construction | 2021 |
| THE Travel REP Limited | Administrative & support | 2010 |
| THE Ultimate Balloon Company (UK) Limited | Other services | 2006 |
| THE Union Club Limited | Hospitality | 2013 |
| THE Urban FOX & Partners Ltd | Professional & scientific | 2021 |
| THE Vernon Sisters Limited | Arts & recreation | 2012 |
| THE VIC Swinton Limited | Hospitality | 2025 |
| THE Village Diner Ltd | Hospitality | 2025 |
| THE Wall Panel Centre Ltd | Wholesale & retail | 2019 |
| THE Warehouse Yellow Arch Limited | Wholesale & retail | 2020 |
| THE Water Machine Company Limited | Water & waste | 2019 |
| THE Wel-Don Hair Salon Limited | Other services | 2002 |
| THE Welcome Inn Hotel Ltd | Hospitality | 2022 |
| THE Wellness Team Ltd | Education | 2018 |
| THE Wesley Centre (Maltby) Limited | Administrative & support | 2005 |
| THE Whitcut Consultancy Ltd | Transport & logistics | 2016 |
| THE White Rooms @ Woodlaithes Limited | Other services | 2008 |
| THE Window Fixer Limited | Construction | 2020 |
| THE Woodlands S63 Ltd | Households | 2025 |
| THE Woof Pack Company Yorkshire Limited | Other services | 2023 |
| THE Work MEN Limited | Information & communication | 2025 |
| THE Workplace Bodycoach Limited | Other services | 2023 |
| THE World of Leather Ltd | Wholesale & retail | 2014 |
| THE Yousaf Group Ltd | Financial services | 2023 |
| Thebe Kingdom Ltd | Wholesale & retail | 2015 |
| Thedarkstorms Studio Ltd | Information & communication | 2025 |
| Theloup Ltd | Wholesale & retail | 2026 |
| Thentia Limited | Wholesale & retail | 2026 |
| Theo Mirfin Strategies Limited | Professional & scientific | 2024 |
| Theo Slack Limited | Construction | 2026 |
| Thephonesource Ltd | Wholesale & retail | 2024 |
| Theprocleaners Limited | Administrative & support | 2024 |
| Therapy South Yorkshire Limited | Health & social care | 2015 |
| Thermac Ltd. | Construction | 2021 |
| Thermatec Ltd | Construction | 2010 |
| Thermohire Limited | Professional & scientific | 2011 |
| Thespacebetween Ltd. | Health & social care | 2014 |
| Thetford Limited | Wholesale & retail | 1971 |
| Theyellowlion P&K Limited | Hospitality | 2026 |
| Thhink Wireless Technologies Limited | Professional & scientific | 2009 |
| Thicketts Hair Limited | Other services | 2020 |
| Things Works Ltd. | Information & communication | 2021 |
| Things YOU Want Ltd | Wholesale & retail | 2025 |
| Think Data Ltd | Information & communication | 2025 |
| Third ERA Clothing Limited | Wholesale & retail | 2025 |
| Third Shot UK Ltd | Wholesale & retail | 2025 |
| Thomas Ibizugbe Global Venture Ltd | Wholesale & retail | 2021 |
| Thomas Renovations Ltd | Construction | 2026 |
| Thompsons Teeth Ltd | Health & social care | 2025 |
| Thompsons Telecoms Ltd | Extraterritorial | 2019 |
| Thompson’S Treats Ltd | Wholesale & retail | 2023 |
| Thomson & Kelly Limited | Extraterritorial | 1970 |
| Thoresby Vale Management Company Limited | Households | 2019 |
| Thornbridge 1969 Limited | Extraterritorial | 2014 |
| Thorncliffe Cricket & Social Club Limited | Arts & recreation | 1947 |
| Thornfield Day Care Limited | Health & social care | 2016 |
| Thornhill Electrical and Mechanical Ltd | Manufacturing | 2015 |
| Thornhill Fibres Limited | Manufacturing | 1996 |
| Thornhill House Management Services Limited | Real estate | 2008 |
| Thornhill Sales Limited | Wholesale & retail | 1998 |
| Thornside Horseboxes Limited | Manufacturing | 2025 |
| Thornton & Wood (U.K.) Limited | Construction | 1988 |
| Thornton Heating & Property Ltd | Construction | 2022 |
| Thornwood Consultancy Limited | Administrative & support | 2016 |
| Thorpe Hesley Fish Bar Ltd | Hospitality | 2026 |
| Thorpe Scaffolding Services Ltd | Construction | 2010 |
| Thorpe Steel Installation Ltd | Construction | 2018 |
| Thorpe Waste Removals Limited | Professional & scientific | 1973 |
| Thorpe's Trading Ltd | Administrative & support | 2004 |
| Thorpes Design Ltd | Professional & scientific | 2013 |
| Thorpes Limited | Professional & scientific | 2005 |
| Thorpes PM Ltd | Extraterritorial | 2018 |
| Thorpetech Ltd | Information & communication | 2025 |
| Thos.Winnard & Sons Limited | Manufacturing | 1945 |
| Thozak Limited | Health & social care | 2018 |
| Threadicted Ltd | Wholesale & retail | 2024 |
| Three AM Property Limited | Real estate | 2023 |
| Three Greedy Pigs Ltd | Hospitality | 2023 |
| Three Hills Developments Limited | Construction | 2024 |
| Three Lions 66 Limited | Hospitality | 2024 |
| Three Lions Sixty SIX Ltd | Hospitality | 2025 |
| Three Little Birds Group Limited | Administrative & support | 2025 |
| Three Oaks Property Co. Limited | Real estate | 2026 |
| Three Shields FM Limited | Construction | 2024 |
| Three Sixty Visuals Limited | Extraterritorial | 2019 |