| Tekalloy Ltd | Administrative & support | 2024 |
| Tekfloor Limited | Construction | 2012 |
| Tekgroup Ltd | Extraterritorial | 2023 |
| Telefusion Communications Limited | Extraterritorial | 1943 |
| Telos Lighting Limited | Wholesale & retail | 2025 |
| Temple Belwood Sports Falcons Ltd | Agriculture & fishing | 2024 |
| Temple Contractors Limited | Construction | 2023 |
| Temploy Personnel Limited | Administrative & support | 2001 |
| Tempnur Ltd | Health & social care | 2018 |
| Tenant Resolve Ltd | Real estate | 2026 |
| Tenement Home Limited | Real estate | 2013 |
| Tenet Productions Ltd | Information & communication | 2024 |
| Tensible Limited | Information & communication | 2019 |
| Tentro Tech and Device Solutions Ltd | Wholesale & retail | 2026 |
| Terahertz Energy Limited | Professional & scientific | 2013 |
| Teresa Leach Green Ltd | Administrative & support | 2025 |
| Teresa Sayner Art Limited | Information & communication | 2013 |
| Teresa Tarmey Education Limited | Education | 2024 |
| Teresa Tarmey Holdings Ltd | Financial services | 2024 |
| Teresa Tarmey Limited | Other services | 2017 |
| Teresa Tarmey Partnerships Limited | Other services | 2024 |
| Teresa Tarmey Skin Care Limited | Other services | 2018 |
| Teripagratis Art and Tattoo Limited | Other services | 2022 |
| Terras Bar Ltd | Hospitality | 2024 |
| Terry Comms Limited | Information & communication | 2016 |
| Terrys DIY Ltd | Wholesale & retail | 2025 |
| Tesseract Trading Ltd | Wholesale & retail | 2026 |
| Tessy Afro Caribbean Ltd | Hospitality | 2025 |
| Testt Technical Limited | Manufacturing | 2022 |
| TG Geraghty Limited | Construction | 2023 |
| TH International Ltd | Wholesale & retail | 2024 |
| Thai River Kwai Limited | Hospitality | 2021 |
| Thai-Uk Style Limited | Wholesale & retail | 2020 |
| Thaiology Holistic Limited | Other services | 2026 |
| Thaiology Limited | Other services | 2026 |
| Thalia Pizza Ltd | Hospitality | 2023 |
| Thames House Mangement Company Limited | Real estate | 2019 |
| Thandiwek Limited | Health & social care | 2019 |
| That Little Cake Shop Ltd | Wholesale & retail | 2014 |
| That Looks Queer Ltd | Education | 2024 |
| That Tall GUY Clinical Services Limited | Health & social care | 2015 |
| That's the Spirit Ltd | Real estate | 2019 |
| THE Aesthetics Academy by Browmasters Ltd | Other services | 2020 |
| THE Amery Stays Ltd | Real estate | 2025 |
| THE Angels Service Limited | Health & social care | 2014 |
| THE Anti Salesmen Ltd | Wholesale & retail | 2025 |
| THE Art Works Gallery C.I.C. | Health & social care | 2014 |
| THE Balcony CB Limited | Construction | 2020 |
| THE Barber Shop Team Limited | Other services | 2012 |
| THE Barbers Club Sunnyside Ltd | Other services | 2025 |
| THE Barber’S Inn Ltd | Other services | 2024 |
| THE Barley PUB Group Ltd | Hospitality | 2026 |
| THE Base Community Hub Ltd | Health & social care | 2018 |
| THE Bathroom and Boiler Company Limited | Construction | 2018 |
| THE Bay Horse (Accommodation) Ltd | Hospitality | 2012 |
| THE Baytree Brunch Ltd | Hospitality | 2018 |
| THE Beauty Boutique (Wickersley) Ltd | Other services | 2023 |
| THE Beauty Shop (Rotherham) Limited | Other services | 2016 |
| THE Belle Group Limited | Professional & scientific | 2018 |
| THE Big Red Coring Company Limited | Construction | 2025 |
| THE Blind Badger Cocktail Company Limited | Wholesale & retail | 2021 |
| THE Blueprint Public Health Education Ltd | Education | 2025 |
| THE Box Yard (Rotherham) Limited | Transport & logistics | 2019 |
| THE Brecks Community Hub CIC | Arts & recreation | 2021 |
| THE Bungalow African Community Centre Limited | Hospitality | 2020 |
| THE Bunka Ltd | Hospitality | 2026 |
| THE Burns Abodes Ltd | Real estate | 2021 |
| THE Cafe Inside Ltd | Hospitality | 2025 |
| THE Cake Shed at 10 Ltd | Manufacturing | 2025 |
| THE Calder(Yorkshire) Ltd | Hospitality | 2026 |
| THE Calibration LAB Ltd | Professional & scientific | 2022 |
| THE Car Surgeons Ltd | Wholesale & retail | 2026 |
| THE Carpenters Arms (Market Weighton) Limited | Hospitality | 2022 |
| THE Carpet Shop Contract Flooring Solutions Ltd | Wholesale & retail | 2020 |
| THE Cell Mart Limited | Wholesale & retail | 2025 |
| THE Children, Young People and Families' Consortium | Other services | 2008 |
| THE Claim Team Limited | Professional & scientific | 2022 |
| THE Clothiers (Stocksmoor) Ltd | Hospitality | 2025 |
| THE Club Golf Centre Ltd | Arts & recreation | 2024 |
| THE Coach Consultant Fitpro Ltd | Professional & scientific | 2020 |
| THE Coal Industry Social Welfare Organisation 2014 | Administrative & support | 2014 |
| THE Coffee GUY Services Ltd | Manufacturing | 2020 |
| THE Colin (West Yorkshire) Ltd | Hospitality | 2023 |
| THE Comms Department Limited | Professional & scientific | 2015 |
| THE Consultancy Firm Ltd | Professional & scientific | 2025 |
| THE Cooking Skills Academy Ltd | Hospitality | 2013 |
| THE Corner TAP Ltd. | Hospitality | 2019 |
| THE Creative Department Limited | Professional & scientific | 2022 |
| THE Croft Shirebrook Management Company Limited | Households | 2011 |
| THE Crown Inn Newhill Limited | Hospitality | 2017 |
| THE Custom Printers Limited | Manufacturing | 2023 |
| THE Daparian Foundation CIC | Professional & scientific | 2020 |
| THE Dearne Pheasant Ltd | Information & communication | 2021 |
| THE Development Catalyst (ESP) Limited | Professional & scientific | 2018 |
| THE Diocese of Sheffield Academies Trust | Education | 2013 |
| THE Drinking Post Ltd | Hospitality | 2023 |
| THE Drinky TIN Events Ltd | Hospitality | 2024 |
| THE EAR Care Studio Limited | Health & social care | 2026 |
| THE Electric Gate Shop Ltd | Wholesale & retail | 2006 |
| THE Elevator Company Limited | Construction | 2008 |