| Timlyd Limited | Health & social care | 2015 |
| Timothy James Property Holdings Limited | Financial services | 2020 |
| Tina Lettings Ltd. | Real estate | 2017 |
| Tina's Tots Ltd | Health & social care | 2018 |
| Tinara Vale & Co Limited | Real estate | 2026 |
| Tinashe Catering Ltd | Hospitality | 2022 |
| Tinasholdings Ltd | Information & communication | 2018 |
| Tindale & Stanton Limited | Manufacturing | 1974 |
| Tindalls Farm Management Company Limited | Real estate | 2025 |
| Tingle Tilers Limited | Wholesale & retail | 1979 |
| Tingles.Dating Ltd | Other services | 2025 |
| Tingley Hand Car Wash Ltd | Administrative & support | 2025 |
| Tingley Storage Ltd | Other services | 2023 |
| Tini KIM Limited | Administrative & support | 2025 |
| Tinkle Group Limited | Information & communication | 2019 |
| Tinkle Telecom Ltd | Wholesale & retail | 2017 |
| Tino Decor Limited | Construction | 2026 |
| Tinshill Lane Cleaning Limited | Other services | 2003 |
| Tint Retail Limited | Other services | 2017 |
| Tint Wellington Street Limited | Other services | 2024 |
| Tintra 3.0 Limited | Information & communication | 2021 |
| Tiny BOO Ltd | Health & social care | 2018 |
| Tiny Bubble Shop Limited | Hospitality | 2024 |
| Tiny Embers Ltd | Information & communication | 2021 |
| Tiny Tickers Limited | Information & communication | 1999 |
| Tiny Treasuress Leeds Limited | Health & social care | 2025 |
| Tinydeal Services Limited | Wholesale & retail | 2025 |
| TIP London Ltd | Professional & scientific | 2021 |
| TIP Streak Ltd | Arts & recreation | 2018 |
| TIP Top Brands UK Ltd | Wholesale & retail | 2024 |
| TIP Top Business Solutions Limited | Construction | 2010 |
| TIP Top Windows and Doors Ltd | Construction | 2024 |
| Tippo Ltd | Other services | 2024 |
| Tipsy Calf Limited | Hospitality | 2018 |
| Tirna Ltd | Real estate | 2025 |
| Tirrit UK Limited | Manufacturing | 2018 |
| Tishk Limited | Wholesale & retail | 2025 |
| Tisquantum Limited | Information & communication | 2017 |
| Tissiman Properties Ltd | Real estate | 2020 |
| Tissue Regenix Group Ltd | Administrative & support | 2006 |
| Tissue Regenix Holdings Limited | Professional & scientific | 2017 |
| Tissue Regenix Limited | Professional & scientific | 2006 |
| Titan Holdings LLC Ltd | Wholesale & retail | 2025 |
| Titan Installations Ltd | Construction | 2018 |
| Titan Load Restraints (UK) Ltd | Other services | 2017 |
| Titan Media & Marketing Limited | Professional & scientific | 2021 |
| Titan Metal Systems Limited | Manufacturing | 2025 |
| Titan North Ltd | Real estate | 2020 |
| Titan Parts Direct Ltd | Wholesale & retail | 2026 |
| Titan Properties Limited | Real estate | 1968 |
| Titan Software Development Ltd | Information & communication | 2023 |
| Titan Technologies Ltd | Manufacturing | 2019 |
| Titan TEN Ltd | Information & communication | 2026 |
| Titangr & Co Ltd | Health & social care | 2021 |
| Titanium Assets Ltd | Real estate | 2024 |
| Titanx Multimedia Ltd | Information & communication | 2018 |
| Titarlo Limited | Other services | 2023 |
| Tithe House Limited | Manufacturing | 2025 |
| Titus Construction Ltd | Construction | 2025 |
| Tiwantiwa Ltd | Hospitality | 2025 |
| Tiyal Ltd | Real estate | 2020 |
| TJ Davenport Ltd | Financial services | 2026 |
| TJ Express Same Day Limited | Transport & logistics | 2026 |
| TJ Foodtech Solutions Limited | Professional & scientific | 2014 |
| TJ Investco Limited | Financial services | 2020 |
| TJ Medix Ltd | Health & social care | 2013 |
| TJ Revitt Limited | Real estate | 2022 |
| TJ Visuals Ltd | Professional & scientific | 2022 |
| Tj's Bar & Grill Limited | Hospitality | 2018 |
| Tj-O’Neill Ltd | Transport & logistics | 2026 |
| TJB Growth Ltd | Professional & scientific | 2026 |
| TJB Technology Ltd | Professional & scientific | 2017 |
| TJD Joinery & Building Solutions Ltd | Construction | 2020 |
| Tjdc Consulting Ltd | Professional & scientific | 2018 |
| Tjeb Property Limited | Real estate | 2022 |
| TJK Property Consultancy Limited | Professional & scientific | 2023 |
| TJK Property Services Limited | Construction | 2022 |
| TJL Consultancy Ltd | Information & communication | 2022 |
| TJM (Yorkshire) Ltd | Real estate | 2021 |
| Tjmj Light Ltd | Information & communication | 2025 |
| Tjmr Properties Limited | Real estate | 2001 |
| TJS 0113 Ltd | Hospitality | 2024 |
| TJT Developments (Leeds) Limited | Real estate | 2013 |
| TJW Digital Engineering Consultants Limited | Professional & scientific | 2021 |
| TK Financial Ltd | Information & communication | 2018 |
| TK Gymfit CIC | Arts & recreation | 2022 |
| TK LDS Limited | Hospitality | 2023 |
| TK Management Limited | Other services | 2013 |
| TK Media Limited | Professional & scientific | 2025 |
| TK Mittal Orthodontics Ltd | Health & social care | 2021 |
| TK Nails & Beauty Limited | Other services | 2018 |
| TK Northern Limited | Wholesale & retail | 2025 |
| TK Payroll and Pension Services Ltd | Professional & scientific | 2020 |
| TK Restaurant & Leisure Ltd | Hospitality | 2023 |
| TK Sales Ltd | Wholesale & retail | 2017 |
| TK Shorte Properties Ltd | Real estate | 2026 |
| Tk's Pizzeria Ltd | Hospitality | 2020 |
| Tk's Tuition Ltd | Education | 2022 |
| TKA Christ Construction Ltd | Construction | 2020 |
| TKA Estates Ltd | Real estate | 2026 |