| Tickbax Ltd | Manufacturing | 2024 |
| Tickticktick Ltd | Administrative & support | 2019 |
| Tico Tico (Leeds ) Ltd | Hospitality | 2023 |
| TID Properties Limited | Real estate | 2020 |
| Tide Northern Investments Limited | Real estate | 2021 |
| Tidelark Investment Co.Limited | Real estate | 1964 |
| Tidokgate Limited | Wholesale & retail | 2020 |
| Tidworth Consultants Ltd | Construction | 2018 |
| Tidy & Touch Limited | Transport & logistics | 2025 |
| Tidy Planet Energy Limited | Professional & scientific | 2009 |
| Tidy Planet Limited | Manufacturing | 2001 |
| Tidy Services Leeds Limited | Administrative & support | 2020 |
| Tidy Swift Solutions Limited Limited | Transport & logistics | 2025 |
| Tidyland Property Management Limited | Households | 1982 |
| Tidyplan Limited | Construction | 1992 |
| Tier 1 Engineering Ltd | Energy | 2025 |
| Tier 1 Group Holdings Limited | Financial services | 2024 |
| Tier 1 Power Solutions Global Limited | Manufacturing | 2025 |
| Tier 1 Power Solutions Limited | Construction | 2020 |
| Tier One Crunch Ltd. | Information & communication | 2017 |
| Tier Properties Limited | Households | 2022 |
| Ties Planet Limited | Wholesale & retail | 2006 |
| Tietra Flavors Food Ltd | Manufacturing | 2024 |
| Tiffany Holdings Ltd | Real estate | 2020 |
| Tiffin Express Ltd | Hospitality | 2019 |
| Tiga Global Ltd | Wholesale & retail | 2021 |
| Tiger Estates NE Ltd | Hospitality | 2015 |
| Tiger Feet Party Limited | Wholesale & retail | 2013 |
| Tiger Gate Property Limited | Real estate | 2024 |
| Tiger Line (Golf) Limited | Extraterritorial | 1997 |
| Tiger Mobiles Limited | Information & communication | 2014 |
| Tiger Modular Limited | Manufacturing | 2020 |
| Tiger Strategic Consulting Limited | Other services | 2019 |
| Tight Lines Music C.I.C. | Information & communication | 2019 |
| Tigress Properties Ltd | Real estate | 2018 |
| Tiholov Ltd | Education | 2019 |
| Tiji Harrogate Limited | Arts & recreation | 2025 |
| Tiji Limited | Arts & recreation | 2018 |
| Tiji Seacroft Limited | Arts & recreation | 2025 |
| TIK TAK Limited | Wholesale & retail | 2024 |
| Tikabel Business Services Ltd | Health & social care | 2016 |
| Tiki LAB Limited | Hospitality | 2022 |
| Tiki Technology Limited | Information & communication | 2017 |
| Tiki's Teepee Ltd | Agriculture & fishing | 2022 |
| Tiktok One Stop Shop Ltd | Information & communication | 2025 |
| Tilbury Holdings Co Limited | Financial services | 2024 |
| Tile Bridge Services Limited | Professional & scientific | 2017 |
| Tile Enterprise Ltd | Wholesale & retail | 2011 |
| Tile Life Ltd | Wholesale & retail | 2023 |
| Tile Point Ltd | Wholesale & retail | 2018 |
| Tileidea Limited | Real estate | 1990 |
| Tiles 4 UK Limited | Wholesale & retail | 2025 |
| Tiles for Miles Ltd | Construction | 2023 |
| Tiles-Direct (Online) Ltd | Wholesale & retail | 2020 |
| Tilleybilleys Business Tools Ltd | Manufacturing | 2024 |
| Tilly and Cooper Corporate Accountants Limited | Information & communication | 2025 |
| Tilly's House Limited | Professional & scientific | 2009 |
| Tilmore Investments | Financial services | 2020 |
| Tilt Content Limited | Information & communication | 2017 |
| Tilz Collection Ltd | Wholesale & retail | 2022 |
| Tilz Gear Ltd | Wholesale & retail | 2022 |
| Tilz Gifts Ltd | Wholesale & retail | 2022 |
| Tilz Prosperitas Limited | Wholesale & retail | 2014 |
| Tilz Toys Ltd | Wholesale & retail | 2022 |
| Tilzmart Limited | Wholesale & retail | 2021 |
| TIM Dunk Limited | Professional & scientific | 2016 |
| TIM Hartley Planning Services Limited | Professional & scientific | 2025 |
| TIM Hinchcliffe Commercial Broker Ltd | Financial services | 2015 |
| TIM Hortons Ltd | Real estate | 2012 |
| TIM Oliver Design Ltd | Arts & recreation | 2005 |
| Tima Carers Limited Limited | Health & social care | 2025 |
| Timber & Joinery Supplies Limited | Wholesale & retail | 2003 |
| Timber & Tech Ltd | Manufacturing | 2025 |
| Timber and Joinery Solutions Limited | Construction | 2005 |
| Timber Systems Limited | Water & waste | 1979 |
| Timber Windows North East Limited | Manufacturing | 2024 |
| Timber Windows North Limited | Manufacturing | 2001 |
| Timbercraft Joinery Limited | Construction | 1984 |
| Timberculture Ltd | Agriculture & fishing | 2021 |
| Timberlake Penhale Limited | Professional & scientific | 2024 |
| Time (Northern) Ltd | Hospitality | 2013 |
| Time Check Planning Limited | Professional & scientific | 2018 |
| Time Flies Properties Ltd | Real estate | 2020 |
| Time Height Ltd | Wholesale & retail | 2023 |
| Time Locums Ltd | Health & social care | 2013 |
| Time Square (Headingley Leeds) Management Company Limited | Households | 2002 |
| Time Travel Toys UK Ltd | Wholesale & retail | 2024 |
| Time Trip Events Limited | Arts & recreation | 2019 |
| Time Vault Trading Ltd | Financial services | 2025 |
| Time Wash Laundry Limited | Other services | 2017 |
| TIME2BUY Limited | Financial services | 2026 |
| Timedefinition Limited | Real estate | 2017 |
| Timeless Axiom Ltd | Manufacturing | 2025 |
| Timeless Cinematics Ltd | Information & communication | 2025 |
| Timelimit Limited | Construction | 1996 |
| Timepiece Trading Limited | Wholesale & retail | 2019 |
| Times Property Developments (UK) Limited | Real estate | 2002 |
| Timezone Business Ltd | Professional & scientific | 2023 |
| Timhales Ltd | Professional & scientific | 2014 |
| Timjackson Sheds Ltd | Other services | 2019 |