| Topnotch Drinks Limited | Hospitality | 2019 |
| Tops Protection Limited | Administrative & support | 2025 |
| Topspec Grounds Maintenance Ltd | Administrative & support | 2007 |
| Toptierdeals Ltd | Real estate | 2023 |
| Topup Care Services Limited | Health & social care | 2023 |
| Torak Productions Limited | Administrative & support | 2020 |
| Toranj Pizza Ltd | Hospitality | 2023 |
| Tordoff Holmes Ltd | Construction | 2017 |
| Torello Property Limited | Real estate | 2022 |
| Torlane Haulage Limited | Transport & logistics | 2026 |
| Torlane Services Limited | Transport & logistics | 1988 |
| Torquewrench Productions Limited | Arts & recreation | 2002 |
| Torr Property Management Ltd | Real estate | 2023 |
| Torr Trading Ltd | Professional & scientific | 2020 |
| Torres Engineering and Pumps Limited | Manufacturing | 1981 |
| Torres Pumps Holdings Limited | Financial services | 2023 |
| Torrin Asset Management Limited | Administrative & support | 2008 |
| Tortoise Consulting Engineers Ltd | Professional & scientific | 2025 |
| Tortola Care Consultants Ltd | Health & social care | 2010 |
| Torwood Medical Limited | Health & social care | 2017 |
| Toseland Design & Build Ltd | Construction | 2019 |
| Tosjohnson Ltd | Health & social care | 2021 |
| Tosmok Limited | Wholesale & retail | 2017 |
| Toss Global Ventures Ltd | Health & social care | 2025 |
| Total Business Services Ltd | Administrative & support | 2025 |
| Total FRB Ltd | Construction | 2024 |
| Total Heat & Electrical Ltd | Construction | 2018 |
| Total Heat Systems Limited | Manufacturing | 2008 |
| Total HR Ltd. | Professional & scientific | 2005 |
| Total Laundry Services Ltd | Other services | 2020 |
| Total Legal Leads Limited | Administrative & support | 2019 |
| Total Legal Management Limited | Professional & scientific | 2017 |
| Total Legal Solutions Ltd | Administrative & support | 2015 |
| Total Office Products and Services Limited | Manufacturing | 2001 |
| Total Paving & Groundworks Company Ltd | Construction | 2017 |
| Total Rebuild Scaffolding Limited | Construction | 2008 |
| Total Recycle Limited | Professional & scientific | 2004 |
| Total Rental Services Ltd | Real estate | 2025 |
| Total SEO Services Limited | Information & communication | 2010 |
| Total Testing Services Limited | Manufacturing | 2004 |
| Total Waste Solutions Ltd | Other services | 2018 |
| Total Workout Gym Ltd | Arts & recreation | 2026 |
| Totally Cirrus Limited | Information & communication | 2012 |
| Totally Communications Limited | Information & communication | 1999 |
| Totally Cosmetic Teeth Ltd | Other services | 2026 |
| Totally Cosmetics Ltd | Other services | 2026 |
| Totally Good Limited | Health & social care | 2015 |
| Totally Hair Ltd | Other services | 2026 |
| Totally Plastered & Co Limited | Construction | 2025 |
| Totally Taped Limited | Construction | 2006 |
| Totemvale Limited | Households | 1982 |
| Totl Tech Ltd | Information & communication | 2021 |
| Totley Barber Ltd | Other services | 2025 |
| Totley Independent Community Interest Company | Information & communication | 2011 |
| Totley Rise Limited | Health & social care | 2021 |
| Totley Tech Ltd | Professional & scientific | 2024 |
| Totleybank Property Management Limited | Households | 2017 |
| Tots & Teens (SY) Ltd | Education | 2019 |
| Toucan Transport and Logistics Limited | Transport & logistics | 2024 |
| Touchmonkey Limited | Information & communication | 2014 |
| Tough Love Records Ltd | Arts & recreation | 2011 |
| Tounkara Services Limited | Construction | 2025 |
| Tour AL Kaaba Travels Ltd | Administrative & support | 2019 |
| Tour AL Madina Travel Ltd | Other services | 2023 |
| Tour Management Elite Limited | Arts & recreation | 2017 |
| Tour Music Live Limited | Arts & recreation | 2015 |
| Touring One LLP | | 2022 |
| Tourist With a Typewriter Limited | Information & communication | 2004 |
| Tourpro Products Limited | Information & communication | 2017 |
| Toutes Directions Limited | Transport & logistics | 2005 |
| Tovah Ltd | Arts & recreation | 2026 |
| TOW & Go Caravan & Motorhome Sales Limited | Wholesale & retail | 2018 |
| Tower Block Fire Safety Limited | Extraterritorial | 2017 |
| Tower Bridge Blend Ltd | Hospitality | 2024 |
| Tower DMS Limited | Information & communication | 2016 |
| Towerleaze Limited | Professional & scientific | 2023 |
| Towers PM Limited | Real estate | 2003 |
| Towing & Trailers Limited | Wholesale & retail | 2006 |
| Town & Country (Sales & Repair) Ltd | Manufacturing | 2009 |
| Town & Country Wealth Management Ltd | Professional & scientific | 2020 |
| Town 698 Limited | Hospitality | 2024 |
| Town Moor Dental Care Limited | Health & social care | 2016 |
| Towneley Arms Ltd | Hospitality | 2019 |
| Townend Sports Bar Ltd | Hospitality | 2025 |
| Townes Cake & Bread Ltd | Hospitality | 2024 |
| Towngate Holdings Limited | Real estate | 1994 |
| Towngate Tech Ltd | Construction | 2024 |
| Towngate Technologies Ltd | Construction | 2010 |
| Townroe (Hi-Tech Plating) Limited | Professional & scientific | 1990 |
| Townroe Holdings Limited | Professional & scientific | 1941 |
| Townsend Rental and Properties Limited | Real estate | 2022 |
| Townships 2 Ltd | Health & social care | 2023 |
| Towsafe Ltd | Information & communication | 2013 |
| Toxophily Investments Limited | Real estate | 2023 |
| Toy Clothing Ltd | Wholesale & retail | 2025 |
| Toy Exchange Ltd | Wholesale & retail | 2024 |
| Toybox Childrens Nursery Ltd | Education | 2016 |
| TP Bars Ltd | Hospitality | 2021 |
| TP Classics Limited | Other services | 2021 |
| TP Health (Holdings) Limited | Financial services | 2020 |