| TKA Self Vehicle Storage Ltd | Wholesale & retail | 2021 |
| TKD Healthcare Limited | Health & social care | 2024 |
| TKI Property Group Ltd | Real estate | 2022 |
| TKI Students Ltd | Real estate | 2024 |
| Tklm Ltd | Public administration | 2014 |
| TKM Commercials Ltd | Transport & logistics | 2018 |
| TKM Property Limited | Real estate | 2025 |
| TKO Digital Ltd | Wholesale & retail | 2017 |
| TL Economics Ltd | Professional & scientific | 2026 |
| TL Property Group Ltd | Real estate | 2026 |
| TL Surfacing and Excavations Ltd | Construction | 2024 |
| TLC Consultancy Limited | Health & social care | 2014 |
| TLC Hair Design Ltd | Other services | 2024 |
| TLC Payroll Solutions Limited | Professional & scientific | 2016 |
| TLC35 Limited | Health & social care | 2015 |
| TLM Enterprise Limited | Health & social care | 2014 |
| TLS Kcal Ltd | Manufacturing | 2026 |
| TLS Property Holdings Ltd | Real estate | 2025 |
| TM Advances Holding Company Limited | Financial services | 2020 |
| TM Advances Limited | Financial services | 2010 |
| TM Cleaning Services Leeds Limited | Administrative & support | 2025 |
| TM Collections Ltd | Wholesale & retail | 2025 |
| TM Domestic Builds Limited | Construction | 2025 |
| TM Financial Brokers Ltd | Financial services | 2017 |
| TM KN Holdings Ltd | Financial services | 2025 |
| TM Landscaping & Groundworks Ltd | Administrative & support | 2016 |
| TM Long Ltd | Construction | 2020 |
| TM Nails Ltd | Other services | 2026 |
| TM Permitting Ltd | Administrative & support | 2024 |
| TM Residential Management Limited | Real estate | 2023 |
| TMA Advisory Services Limited | Professional & scientific | 2024 |
| Tmbureau UK Limited | Administrative & support | 2025 |
| TMC Living Limited | Real estate | 2022 |
| TMC Maintenance Yorkshire Limited | Construction | 2026 |
| TMC Refurbs Limited | Construction | 2026 |
| Tmdex Ltd | Construction | 2022 |
| Tmech Ltd | Construction | 2019 |
| TMF (UK) Limited | Professional & scientific | 2000 |
| TMF Decorating Ltd | Construction | 2023 |
| TMJ Estates Limited | Real estate | 2000 |
| Tmkuk Limited | Real estate | 2023 |
| Tmmg Properties Ltd | Real estate | 2026 |
| Tmorw.Org Ltd | Professional & scientific | 2024 |
| TMP Electrical Limited | Construction | 2023 |
| TMS Services (Leeds) Ltd | Real estate | 2019 |
| TMT Civils and Groundworks Ltd | Construction | 2022 |
| TMT Financial Services Limited | Financial services | 2017 |
| TMT Web Solutions Ltd | Information & communication | 2021 |
| TMU Global Limited | Wholesale & retail | 2023 |
| Tmurapi Limited | Health & social care | 2016 |
| TN Home Services Ltd | Households | 2023 |
| TN Leeds Ltd | Hospitality | 2026 |
| TNL Properties Limited | Real estate | 2017 |
| Tnmlu Commercial Ltd | Real estate | 2025 |
| Tnmlu Properties Ltd | Real estate | 2025 |
| Tnmlu Residential Ltd | Real estate | 2025 |
| TNS Logistics Limited | Transport & logistics | 2020 |
| TNY Limited | Hospitality | 2022 |
| TNZ Limited | Real estate | 2026 |
| TO Move Limited | Arts & recreation | 2021 |
| TO the Door Ltd | Transport & logistics | 2024 |
| Toader Ltd | Construction | 2019 |
| Toan Limited | Construction | 2020 |
| Toast (Leeds) Limited | Hospitality | 2016 |
| Toast Holdings Ltd | Hospitality | 2025 |
| Tobechukwu Glory Healthcare Ltd | Other services | 2017 |
| Tobias Consultants Limited | Administrative & support | 2016 |
| Tobias Cristian Ltd | Transport & logistics | 2022 |
| Tobieodddy Limited | Health & social care | 2023 |
| Tobin's Gym Ltd | Arts & recreation | 2019 |
| Tobin's Gym, Fitness and Wellbeing Centre C.I.C. | Arts & recreation | 2024 |
| Toby & Home Co Limited | Manufacturing | 2023 |
| Toby Causton Design Ltd | Professional & scientific | 2026 |
| Toby Luper Limited | Wholesale & retail | 2013 |
| Toby Samuel Limited | Professional & scientific | 2017 |
| Tobyjen Limited | Administrative & support | 1989 |
| TOC Food Ltd | Hospitality | 2025 |
| TOC Leeds Limited | Hospitality | 2024 |
| TOC Vegan Ltd | Hospitality | 2023 |
| Tochioge Healthcare Limited | Health & social care | 2015 |
| Tocke Medical Services Ltd | Health & social care | 2023 |
| Tockwith Caravan Storage Ltd | Other services | 2019 |
| Tocons Limited | Professional & scientific | 2024 |
| Today and Always Ltd | Manufacturing | 2025 |
| Today Restaurant Leeds Limited | Hospitality | 2025 |
| Today Shawarma Leeds Ltd | Hospitality | 2025 |
| Today Tech LLP | | 2014 |
| Toddlers Secrets Childminding Ltd | Health & social care | 2026 |
| Todds Vehicle Repairs Ltd | Wholesale & retail | 2023 |
| Tofs Property Ltd | Real estate | 2023 |
| Toft Manufacturing UK Limited | Manufacturing | 2019 |
| Together Desk Limited | Professional & scientific | 2022 |
| Together for Peace | Education | 2008 |
| Together Health Ltd | Wholesale & retail | 2007 |
| Together Inclusive Limited | Professional & scientific | 2022 |
| Together Women Projects (Yorkshire and Humberside) | Health & social care | 2009 |
| Togher Civil Engineering Ltd. | Construction | 2002 |
| Toke Foods Ltd | Wholesale & retail | 2026 |
| Tokencertify Limited | Extraterritorial | 2013 |
| Tokov Limited | Transport & logistics | 2018 |