| THE Galleries (Investments) Ltd | Administrative & support | 2007 |
| THE Gills Otley Limited | Households | 2001 |
| THE Gold Shop Limited | Wholesale & retail | 2003 |
| THE Greyfriars Partnership Limited | Information & communication | 1995 |
| THE Harris Group Limited | Professional & scientific | 2001 |
| THE Harris Partnership Limited | Professional & scientific | 1984 |
| THE Ilkley Osteopathic Practice Limited | Health & social care | 2002 |
| THE International Trade Commission Limited | Extraterritorial | 1998 |
| THE Label Makers Limited | Manufacturing | 1963 |
| THE Little Academy Day Nursery (Severn Road) Ltd | Health & social care | 2003 |
| THE Longwood Engineering Company (Holdings) Limited | Manufacturing | 2003 |
| THE Mews Hotel Limited | Hospitality | 2005 |
| THE Mind Labs Limited | Professional & scientific | 2004 |
| THE NET Trading Company (Leeds) Limited | Wholesale & retail | 2006 |
| THE News Hound Limited | Professional & scientific | 2006 |
| THE Opposition Ltd | Other services | 2003 |
| THE Orangery Health & Beauty Ltd | Other services | 2007 |
| THE Orston Durham OX Limited | Hospitality | 2014 |
| THE Photo ID Card People Limited | Administrative & support | 2007 |
| THE Property Buying Company Limited | Real estate | 2012 |
| THE Public Affairs Company (GB) Ltd | Professional & scientific | 2002 |
| THE SIR Robert Ogden Partnership Limited | Construction | 1989 |
| THE Soap Bloke Ltd | Extraterritorial | 2007 |
| THE Sun Lounge (Ossett) Ltd | Arts & recreation | 2002 |
| THE Travel Magician Limited | Administrative & support | 2008 |
| THE Tyre Shop Halifax Limited | Manufacturing | 2014 |
| THE Upstagers Theatre Charity Limited | Arts & recreation | 1993 |
| THE Valley Clinic Limited | Health & social care | 2007 |
| THE World Internet Commission Limited | Administrative & support | 1999 |
| THE World Trade Commission Limited | Extraterritorial | 1998 |
| THE Youth Association | Health & social care | 1987 |
| Thinkernick Limited | Information & communication | 2022 |
| Thirks Limited | Other services | 2005 |
| Thistle Landscapes Limited | | 1980 |
| Thomas Broadbent & Sons,Limited | Manufacturing | 1895 |
| Thomas Carter Projects Limited | Information & communication | 2004 |
| Thomas Hill Engineering Company(Hull).Limited(The) | Professional & scientific | 1928 |
| Thornes Fabrication Limited | Manufacturing | 2002 |
| Thornhill Electrical Limited | Construction | 2003 |
| Thornton Village Store Limited | Wholesale & retail | 2004 |
| Thorsman & Co. (U.K.) Limited | Manufacturing | 1978 |
| Three Diamonds Ltd | Construction | 2005 |
| Three Records Limited | Information & communication | 2007 |
| Three Sixty Water Services Limited | Professional & scientific | 2005 |
| Thruport Limited | Professional & scientific | 2005 |
| TIM Autos Ltd | Wholesale & retail | 2024 |
| Time Menswear Limited | Wholesale & retail | 2006 |
| Timuli Ltd | Construction | 2021 |
| Tingley Limited | Construction | 2000 |
| Tissuemed Limited | Manufacturing | 1985 |
| Titangaze Innovations Ltd | Wholesale & retail | 2025 |
| TKF Training | Agriculture & fishing | 2009 |
| TLC (Cleaning Services) Ltd. | Professional & scientific | 1993 |
| TNS Fabrics Limited | Manufacturing | 2000 |
| TOM Spellman Plumbing & Heating Engineers Ltd | Construction | 2006 |
| Tomsibbs Limited | Health & social care | 2016 |
| Tony Davis Ltd | Education | 2009 |
| Top Draw Promotions Limited | Information & communication | 2004 |
| Top Treads Limited | Manufacturing | 1990 |
| Topform Components Limited | Administrative & support | 1993 |
| Torevell Dent Limited | Professional & scientific | 2003 |
| Total Comfort (Yorkshire) Limited | Extraterritorial | 2005 |
| Total Dreams Limited | Extraterritorial | 2006 |
| Total I.T. Consulting Limited | Information & communication | 2006 |
| Toyne C.A.D Services Limited | Information & communication | 1998 |
| Tozer LLP | | 2005 |
| Track & Train Supplies Limited | Manufacturing | 2004 |
| Trackrod Motor Club Limited | Arts & recreation | 1977 |
| Trailer Services Limited | Transport & logistics | 1985 |
| Trano Marketing International Limited | Transport & logistics | 1978 |
| Transform Autobodies Limited | Wholesale & retail | 2002 |
| Transunion Information Group Limited | Professional & scientific | 2003 |
| Travis Properties Limited | Real estate | 1976 |
| Trax Leeds Limited | Hospitality | 2006 |
| Trent Bathrooms Limited | Professional & scientific | 1987 |
| Trident Fork Trucks Limited | Manufacturing | 2003 |
| Triglo Limited | Wholesale & retail | 2003 |
| Trilogic (UK) Ltd | Wholesale & retail | 1995 |
| Trimsat Limited | Extraterritorial | 1994 |
| Trisionpeakventures Ltd | Wholesale & retail | 2025 |
| Tubzee Limited | Manufacturing | 2003 |
| Tunworth Court Management Company Limited | Households | 1980 |
| Turning Forward Limited | Real estate | 2005 |
| Twickenham Court (Bradford) Limited | Households | 2002 |
| Two's Company Hairdressing Limited | Other services | 2008 |
| Tyas Heat Ltd | Construction | 2002 |
| Tyre Market Ltd | Wholesale & retail | 2002 |
| Udasoft Ventures Ltd | Other services | 2025 |
| UK Greetings Limited | Manufacturing | 1997 |
| UK Healthcare and Life Sciences Innovation Limited | Other services | 2026 |
| Uk-It Group Limited | Information & communication | 2007 |
| Ultra Fabrication & Maintenance Service Limited | Manufacturing | 2005 |
| Umpireview Limited | Real estate | 1996 |
| Uniglaze (Joinery & Glazing) Limited | Construction | 2008 |
| Unique Electrical Limited | Construction | 2007 |
| United Hebrew Congregation Leeds | Other services | 1984 |
| Unitward Limited | Administrative & support | 1983 |
| Unity Computer Limited | Manufacturing | 1991 |
| Usmaan Autos Ltd | Wholesale & retail | 2026 |
| Usman Mughal Ltd | Wholesale & retail | 2023 |