| Tide and KIN Limited | Wholesale & retail | 2024 |
| Tidy 2025 Investments Limited | Financial services | 2025 |
| Tidy Birds Limited | Wholesale & retail | 2007 |
| Tidy Bookkeeping Ltd | Professional & scientific | 2021 |
| Tidy Commercial Holdings Ltd | Financial services | 2018 |
| Tidy Commercial Properties Ltd | Real estate | 2018 |
| Tidy Holdings Limited | Manufacturing | 2009 |
| Tidy Hydraulics Limited | Manufacturing | 2014 |
| Tidy Properties (2009) Limited | Real estate | 2009 |
| Tidy Properties Management Ltd | Real estate | 2018 |
| Tidy Residential Holdings Ltd | Financial services | 2018 |
| Tidy Residential Properties Ltd | Real estate | 2018 |
| Tidyco Finance Group Ltd | Financial services | 2018 |
| Tidyco Finance Holdings Ltd | Financial services | 2018 |
| Tidyco Limited | Manufacturing | 1996 |
| Tidyco Topco 24 Limited | Financial services | 2024 |
| Tidyhive Properties Limited | Real estate | 2026 |
| TIE Your Camel Ltd | Administrative & support | 2025 |
| Tierra Lease Ltd | Real estate | 2025 |
| Tifehairdrip Limited | Wholesale & retail | 2025 |
| Tiffin Box (Derby) Ltd | Hospitality | 2025 |
| Tiga Holdings Limited | Professional & scientific | 1971 |
| Tiga Marine Limited | Other services | 1984 |
| Tiga Racing Cars Limited | Professional & scientific | 1984 |
| Tigen Limited | Information & communication | 2021 |
| Tiger Inn (Turnditch) Limited | Hospitality | 2014 |
| Tiger Management Services Limited | Professional & scientific | 2013 |
| Tigerhire Equipment Ltd | Manufacturing | 2020 |
| Tight Trade Ltd | Wholesale & retail | 2025 |
| Tiktokaccountant Ltd | Professional & scientific | 2025 |
| Tilda Bear Ltd | Professional & scientific | 2017 |
| Tile District Ltd | Wholesale & retail | 2025 |
| Tile Fort Ltd | Construction | 2022 |
| Tiling Smart Ltd | Wholesale & retail | 2013 |
| Tills Carpentry and Joinery Services Ltd | Manufacturing | 2024 |
| Tilly & Bella Properties Ltd | Real estate | 2023 |
| Tilly Thompson Ltd | Wholesale & retail | 2020 |
| TIM Brett Limited | Professional & scientific | 2013 |
| TIM Croke Tattoo Ltd | Other services | 2014 |
| TIM Kelly Limited | Administrative & support | 2004 |
| Timber Forge CNC Ltd | Manufacturing | 2026 |
| Timber Horizon Ltd | Agriculture & fishing | 2026 |
| Timber Rise Ltd | Agriculture & fishing | 2026 |
| Timbuktu Estates Limited | Real estate | 2021 |
| Time 2 Talk CIC | Health & social care | 2023 |
| Time for YOU (Derby) Limited | Administrative & support | 2014 |
| Time Reflection Therapy Limited | Health & social care | 2015 |
| Time to Shine Cleaning Services Derby Ltd | Administrative & support | 2024 |
| Time Warrior Productions Limited | Wholesale & retail | 2001 |
| Timeless Beauty & Nails LLP | | 2017 |
| Timeless Care Services Limited | Health & social care | 2018 |
| Timeline Constructions PVT Ltd | Construction | 2024 |
| Timely Runaway Company Limited | Real estate | 2020 |
| Times Sharp Ltd | Wholesale & retail | 2025 |
| Timing Solutions Limited | Professional & scientific | 1991 |
| Timms Solicitors LLP | | 2024 |
| Timo Nottingham Ltd | Wholesale & retail | 2025 |
| Tinaec Ltd | Administrative & support | 2025 |
| Tinanve Ltd | Wholesale & retail | 2025 |
| Tindale-Paul Limited | Financial services | 2015 |
| Tinkaz Ltd. | Transport & logistics | 2019 |
| Tinkerbell-Bailey Pubs Limited | Hospitality | 2018 |
| Tinmar Limited | Construction | 2019 |
| Tinoz Ltd | Health & social care | 2013 |
| Tinsley House Therapies Ltd | Health & social care | 2019 |
| Tinsol Ltd | Administrative & support | 2016 |
| Tiny FOX Teethers Ltd | Wholesale & retail | 2022 |
| Tiny Movements Logistics Limited | Transport & logistics | 2025 |
| Tiny Ripples Limited | Professional & scientific | 2023 |
| Tiny Tom's Ltd | Administrative & support | 2021 |
| Tiny Tots Nursery (Derby) Limited | Health & social care | 2013 |
| Tioga Design Services Ltd | Manufacturing | 1981 |
| Tioga EOT Limited | Manufacturing | 2025 |
| Tioga Limited | Manufacturing | 1996 |
| Tipp Topp Homes Ltd | Real estate | 2006 |
| Tipple Holdings Ltd | Real estate | 2023 |
| Tipples Farm Ltd | Agriculture & fishing | 2024 |
| Tippy Tappy at the Keyboard Limited | Information & communication | 2023 |
| Tipu Pizza Kebabs Limited | Hospitality | 2024 |
| Tiramesu Ltd | Manufacturing | 2025 |
| Tirm Holdings Ltd | Professional & scientific | 2025 |
| Tisski Limited | Information & communication | 2011 |
| Titan Private Investigation Limited | Administrative & support | 2014 |
| Titan Roofing Solutions Limited | Construction | 2025 |
| Titan Traders Limited | Construction | 2019 |
| Tiwicare Ltd | Administrative & support | 2022 |
| TJ & JO Ltd | Real estate | 2024 |
| TJ Hunjan Property Limited | Real estate | 2017 |
| Tjay Group Ltd | Transport & logistics | 2025 |
| TJB Consulting Ltd | Professional & scientific | 2024 |
| TJH Transport Services Ltd | Transport & logistics | 2025 |
| TJL Consulting Ltd | Information & communication | 2023 |
| TJL Services Staffordshire Ltd | Administrative & support | 2024 |
| TJM Resources Ltd | Professional & scientific | 2019 |
| Tjoverdrive Limited | Arts & recreation | 2025 |
| TJS Catering Supplies Limited | Wholesale & retail | 2025 |
| TJS Construction & Design Ltd | Construction | 2023 |
| Tjsjholdings Ltd | Real estate | 2026 |
| Tjsos Limited | Real estate | 2023 |
| TJV Holdings Ltd | Financial services | 2023 |