| Tomas Group Ltd | Construction | 2015 |
| Tomas Investments Ltd | Real estate | 2026 |
| Tomi UK Services Ltd | Transport & logistics | 2017 |
| Tomlec Ltd | Construction | 2020 |
| Tommaso Couriers Ltd | Transport & logistics | 2024 |
| Tomorrow's World Order Ltd | Other services | 2019 |
| Tong Booze Ltd | Wholesale & retail | 2023 |
| Tong Buildings Ltd | Real estate | 2014 |
| Tong Football Club Ltd | Arts & recreation | 2025 |
| Tong Garden Centre Limited | Professional & scientific | 2014 |
| Tong Glass & Windows Limited | Manufacturing | 2004 |
| Tong Hairdressers Ltd | Other services | 2020 |
| Tong Management Services Limited | Administrative & support | 2024 |
| Tong Nail Salon Limited | Other services | 2025 |
| Tong Opticians Limited | Wholesale & retail | 2020 |
| Tong Park Hotel Ltd | Hospitality | 2026 |
| Tong Pizza & Grill Ltd | Hospitality | 2024 |
| Tong Street Shop Ltd | Wholesale & retail | 2025 |
| Tong Street Store Ltd | Wholesale & retail | 2026 |
| Tony Rampton Trust | Administrative & support | 1974 |
| Tony Wormald Properties Limited | Real estate | 2020 |
| Tony's Authentic Limited | Manufacturing | 2019 |
| Tools Direct Ltd | Wholesale & retail | 2025 |
| Toolshare Ltd | Information & communication | 2023 |
| Toolstek Limited | Wholesale & retail | 2023 |
| Top Beauty Cheadle Limited | Other services | 2018 |
| Top Discount and DIY Store Limited | Wholesale & retail | 2023 |
| Top Discount Shop Limited | Wholesale & retail | 2022 |
| Top Discount Store Limited | Wholesale & retail | 2019 |
| Top Distribution Ltd | Wholesale & retail | 2024 |
| Top Gear Recovery & Transportation Ltd | Wholesale & retail | 2016 |
| Top Gear Rentals Group Ltd | Administrative & support | 2026 |
| Top HAT Construction Ltd | Construction | 2024 |
| Top HAT Recruitment Ltd | Administrative & support | 2024 |
| Top House (2017) Limited | Hospitality | 2017 |
| Top Kurdish Barbar Ltd | Other services | 2016 |
| Top Line Accountants Ltd | Professional & scientific | 2024 |
| Top Line Bodywork Ltd | Wholesale & retail | 2025 |
| Top Market DAN Ltd | Wholesale & retail | 2016 |
| Top Marks Private Tuition Limited | Education | 2012 |
| Top Mart 1 Ltd | Wholesale & retail | 2026 |
| Top Medics (UK) Limited | Wholesale & retail | 2004 |
| Top Pocket Snooker Centre Ltd | Arts & recreation | 2024 |
| Top Quality Bags Ltd | Wholesale & retail | 2023 |
| Top Quality Commercial Cleaning Services Limited | Administrative & support | 2004 |
| Top Quality Foods Limited | Hospitality | 2019 |
| Top Refurbished UK Ltd | Other services | 2024 |
| Top Sheff Limited | Hospitality | 2025 |
| Top Shop General Store Limited | Wholesale & retail | 2003 |
| Top Shotter Fireworks Limited | Wholesale & retail | 2023 |
| Top Trend Equipment Ltd | Wholesale & retail | 2025 |
| Top Trends Exquisite Gifts Ltd | Health & social care | 2020 |
| Topanga Ltd | Real estate | 2020 |
| Topaz AG Ltd | Real estate | 2024 |
| Topaz II Ltd | Real estate | 2025 |
| Topaz III Ltd | Real estate | 2025 |
| Topburn Limited | Construction | 2000 |
| Topconsultants Limited | Information & communication | 2019 |
| Topdek UK Limited | Construction | 2015 |
| Topdrive Performance Ltd | Wholesale & retail | 2025 |
| Tope Dada Productions CIC | Information & communication | 2026 |
| Topflight Associates Limited | Wholesale & retail | 2002 |
| Topgear Mobile Ltd | Wholesale & retail | 2024 |
| Topgrades Tuition Centre Limited | Transport & logistics | 2020 |
| Topiary by Design Ltd | Wholesale & retail | 2012 |
| Toplift Scaff Ltd | Construction | 2024 |
| Topline Tree & Groundcare Ltd | Administrative & support | 2025 |
| Toplite Ltd | Construction | 2020 |
| Topnotch Flooring Limited | Wholesale & retail | 2026 |
| Topnotch Global Relocation Services Ltd | Real estate | 2021 |
| Topnotch Refurbishment & Drying Specialists Ltd | Financial services | 2026 |
| Topreel Limited | Professional & scientific | 2005 |
| Tops and Tails Limited | Other services | 2022 |
| Tops Consultancy Limited | Administrative & support | 2020 |
| Topspex Ltd | Wholesale & retail | 2021 |
| Topstar Developments Limited | Construction | 2016 |
| Toptier Properties Ltd | Real estate | 2025 |
| Topwill Limited | Construction | 2020 |
| Toqeer Limited | Manufacturing | 2025 |
| Torbox Ltd | Manufacturing | 2025 |
| Tordoff & Co Ltd | Manufacturing | 2014 |
| Tordoff Properties Ltd | Real estate | 2025 |
| Tordoff Textile Machinery Limited | | 1978 |
| Torentun Inns Limited | Wholesale & retail | 2011 |
| Torexstaff Ltd | Administrative & support | 2020 |
| Toro-K Consulting Ltd | Construction | 2025 |
| Torpoint Construction Group Ltd | Construction | 2025 |
| Torque Technics Limited | Wholesale & retail | 2017 |
| Torus Construction Group Limited | Construction | 2018 |
| Torus Construction Services Limited | Construction | 2025 |
| Torus Mechanical Services Limited | Construction | 2024 |
| Torus UK Holdings Limited | Financial services | 2023 |
| Tosmerc Global Limited | Wholesale & retail | 2025 |
| Totaal Social Media Ltd | Professional & scientific | 2009 |
| Total Ability Training Clothing Limited | Wholesale & retail | 2022 |
| Total Build Glossop Limited | Construction | 2025 |
| Total Building Solutions Yorkshire Ltd | Construction | 2024 |
| Total Concept Management Limited | Information & communication | 2008 |
| Total Drinks Limited | Wholesale & retail | 2022 |
| Total Financial Ltd | Professional & scientific | 2008 |