| Thornfield Property Management Limited | Households | 2018 |
| Thorngate Fabrication Ltd | Manufacturing | 2021 |
| Thornley & Lumb (Holdings) Limited | Professional & scientific | 2006 |
| Thornley & Lumb Partnership Limited | Professional & scientific | 1998 |
| Thornton DIY Centre Ltd | Wholesale & retail | 2026 |
| Thornton M Limited | Wholesale & retail | 2015 |
| Thornton Renewables Limited | Energy | 2013 |
| Thornton Road Holdings Ltd | Real estate | 2025 |
| Thornton Road Store Ltd | Wholesale & retail | 2019 |
| Thornton the Corner Shop Ltd | Wholesale & retail | 2025 |
| Thornton Transport Limited | Transport & logistics | 2023 |
| Thornton View Holdings Limited | Real estate | 2023 |
| Thornton White Goods Limited | Wholesale & retail | 2017 |
| Thornton Xpress Ltd | Transport & logistics | 2025 |
| Thorntree Fields Limited | Real estate | 2020 |
| Thorny Ltd | Wholesale & retail | 2023 |
| Thorp Management Company Limited | Households | 1982 |
| Thorpe Hall Farm Limited | Real estate | 2015 |
| Thorpe Lane Aggregates Limited | Administrative & support | 2016 |
| Threadnova Ltd | Wholesale & retail | 2026 |
| Threads 'N' Treats by Mjay Ltd | Wholesale & retail | 2025 |
| Three Sixty Water (Yorkshire) Limited | Administrative & support | 2015 |
| Three Sixty Water Limited | Financial services | 2015 |
| Thrive & Vibe Ltd | Administrative & support | 2021 |
| Thrive Consultancy (Recruitment) Limited | Professional & scientific | 2019 |
| Thrive Kids Club Ltd | Education | 2026 |
| Thrive Living Together Ltd | Hospitality | 2024 |
| Thrive Market Limited | Wholesale & retail | 2008 |
| Thrive Point Limited | Information & communication | 2024 |
| Thrive Together Therapies CIC | Education | 2026 |
| Thriving Care Yorkshire Ltd | Health & social care | 2024 |
| Thrivio Media Ltd | Professional & scientific | 2026 |
| Throxenby Management Company (Bradford) Limited | Households | 2001 |
| Thryv Properties Ltd | Households | 2024 |
| Thunder Road Consulting Ltd | Professional & scientific | 2024 |
| Thurco Engineering Company Limited | Manufacturing | 1971 |
| Thurston Homes Ltd | Construction | 2019 |
| Thwaites Brow Ltd | Real estate | 2023 |
| Thwaites Properties Ltd | Real estate | 2024 |
| TI & Sons Limited | Transport & logistics | 2009 |
| TI Distributions Ltd | Wholesale & retail | 2024 |
| TI Home Improvements Ltd | Construction | 2026 |
| TI Sweets Limited | Wholesale & retail | 2024 |
| TIA Business Consulting Ltd | Professional & scientific | 2024 |
| TIA Madame Therapy Ltd | Other services | 2025 |
| Tiaracle Limited | Wholesale & retail | 2019 |
| Ticketproof Ltd | Information & communication | 2026 |
| Tidy & Decor Ltd | Construction | 2025 |
| Tidy Pair Ltd | Administrative & support | 2025 |
| Tiffin Logistics Ltd | Transport & logistics | 2025 |
| Tiffin Sandwiches Limited | Manufacturing | 2000 |
| Tiffin Vending Ltd | Wholesale & retail | 2025 |
| TIG Developments Ltd | Construction | 2025 |
| Tiger Building Services Ltd | Construction | 2018 |
| Tiger Force Limited | Transport & logistics | 2021 |
| Tiger Optom Ltd | Health & social care | 2012 |
| Tiger Tyres Limited | Administrative & support | 2020 |
| Tigerlily Creations Limited | Wholesale & retail | 2024 |
| Tigerprint Group Limited | Professional & scientific | 1997 |
| Tigerprint Limited | Extraterritorial | 1997 |
| Tigerprint Middle Limited | Extraterritorial | 1997 |
| Tigerthai Restaurant Ltd | Hospitality | 2025 |
| Tihanbor Ltd | Wholesale & retail | 2025 |
| Tijjara Ltd | Wholesale & retail | 2025 |
| Tikboon Ltd | Wholesale & retail | 2025 |
| Tiktokdealer Ltd | Wholesale & retail | 2024 |
| TIL Halifax Limited | Hospitality | 2026 |
| TIL Holdings Limited | Financial services | 2025 |
| TIL Huddersfield Limited | Hospitality | 2026 |
| Tile Trade Limited | Wholesale & retail | 2023 |
| Tillait Ltd | Information & communication | 2022 |
| Tilly ANN Limited | Real estate | 2023 |
| Tilly Community Canal Boat CIC | Transport & logistics | 2025 |
| Tilly Tiger Ltd | Extraterritorial | 2011 |
| Tilted Cupp Ltd | Hospitality | 2025 |
| Timberline Furniture Limited | Wholesale & retail | 2025 |
| Time Trapped Limited | Arts & recreation | 2018 |
| Time-Pass Hub CIC | Other services | 2025 |
| TIME4SMILE Limited | Real estate | 2012 |
| Timeless Touch Ltd | Construction | 2025 |
| Timelight Care & Support Ltd | Health & social care | 2026 |
| Timeswitch Care Limited | Public administration | 2021 |
| Timeswitch Care Live in Limited | Health & social care | 2026 |
| Timetickets Limited | Wholesale & retail | 2025 |
| Timlie Enterprises Ltd | Wholesale & retail | 2025 |
| Timothine Freeman Limited | Hospitality | 2023 |
| Tindle Crossing Developments Limited | Real estate | 2015 |
| Tingley Garden Centre Limited | Wholesale & retail | 2017 |
| Tinnairia Ltd | Hospitality | 2025 |
| Tinsley-Singh Property Co. Ltd | Construction | 2024 |
| Tintub Care Limited | Health & social care | 2021 |
| Tiny Munch Limited | Hospitality | 2025 |
| Tiny Tots Bradford Limited | Education | 2012 |
| Tinyshires Ltd | Agriculture & fishing | 2018 |
| Tipett DIY Supplies Limited | Wholesale & retail | 2024 |
| TIR Liverpool Limited | Hospitality | 2026 |
| TIR Wakefield Limited | Hospitality | 2025 |
| Tirrol Projects Limited | Extraterritorial | 2008 |
| TIS Rock Music Ltd | Information & communication | 2011 |
| TIS Worldwide Ltd | Administrative & support | 2011 |