| Thyme Hospitality Ltd | Manufacturing | 2013 |
| Tidy One Ltd | Administrative & support | 2025 |
| Tilleys the Printers Limited | | 1972 |
| Time Sourcing Holdings Limited | Financial services | 2014 |
| Time Sourcing Ltd | Administrative & support | 2013 |
| Timebomb Tattoo Ltd | Other services | 2022 |
| Tinbox Memories Limited | Information & communication | 2022 |
| Tithe Barn Cafe Limited | Hospitality | 2019 |
| TJ Auto Gates Ltd | Manufacturing | 2003 |
| TJC Agricultural Engineering Limited | Manufacturing | 2016 |
| TL Agencies Limited | Wholesale & retail | 2008 |
| TLC Beau-Tox Leicestershire Ltd | Other services | 2017 |
| TLR Roofing Solutions Ltd | Construction | 2024 |
| TMA Medical Ltd | Health & social care | 2025 |
| TMC Footwear Limited | Wholesale & retail | 2000 |
| Tmdp Group Limited | Professional & scientific | 2013 |
| Tmdp LLP | | 2010 |
| Tmdp Properties Limited | Construction | 2016 |
| TNS Names.Net Limited | Information & communication | 2011 |
| TO Nails Beauty Spa Ltd | Other services | 2024 |
| TOK Design Ltd | Construction | 2014 |
| TOM King Plant Training Limited | Administrative & support | 2022 |
| TOM Kurien Limited | Health & social care | 2022 |
| Top Brand Distribution Limited | Wholesale & retail | 2017 |
| Top Seed Consulting Limited | Arts & recreation | 2006 |
| Topspec Solutions Limited | Information & communication | 2003 |
| Torrix Limited | Construction | 2017 |
| Total Asbestos Solutions Limited | Construction | 2011 |
| Total Car Solutions Limited | Wholesale & retail | 2009 |
| Towers Property Lettings Limited | Real estate | 2023 |
| TP Rugby Joinery Ltd | Manufacturing | 2019 |
| TPJ Logistics Limited | Transport & logistics | 2016 |
| Tractorparts.Co.Uk Limited | Wholesale & retail | 2004 |
| Traditional Chinese Medicine Clinic (Leicester) Limited | Health & social care | 2003 |
| Transport Genesis Ltd | Professional & scientific | 2014 |
| Treble Holdings Ltd | Financial services | 2023 |
| Treble Management Services Limited | Information & communication | 2001 |
| Treehouse Creativity and Wellbeing CIC | Education | 2020 |
| Trenant Road Management Company Limited | Other services | 2015 |
| Tretawn Commercial Services Ltd | Construction | 2024 |
| Tri-X Fuel Systems Limited | Wholesale & retail | 2003 |
| Tribuild Project Services Ltd | Professional & scientific | 2017 |
| Tribuild Solutions Limited | Professional & scientific | 2015 |
| Trinity Machine Tool Services Limited | Manufacturing | 2022 |
| Triple J Logistics Ltd | Transport & logistics | 2023 |
| Triplets Bristol Ltd | Real estate | 2021 |
| Tritec Interiors Limited | Construction | 2001 |
| Truecut Precision Ltd | Manufacturing | 2024 |
| Trulli Living Limited | Real estate | 2023 |
| Trustedrentals Ltd | Real estate | 2019 |
| TS Grale Limited | Administrative & support | 2016 |
| TS Powerlines Limited | Construction | 2024 |
| Tsc-Europe Limited | Professional & scientific | 2017 |
| Tuffentech Services Ltd | Professional & scientific | 2008 |
| Tycoon Software Ltd | Information & communication | 2007 |
| U Sarodia Limited | Other services | 2011 |
| UDR Asset Management Limited | Arts & recreation | 2023 |
| UDR Holdings Limited | Financial services | 2023 |
| UK Plant Hire Ltd | Wholesale & retail | 2017 |
| Ullesthorpe Driving Range Limited | Arts & recreation | 2012 |
| Ullesthorpe Pre-School Limited | Education | 2005 |
| Upholding Solutions Ltd | Professional & scientific | 2022 |
| Uppal Consulting Limited | Public administration | 2015 |
| Uppingham Gate Limited | Construction | 2004 |
| Uprise LED Ltd | Information & communication | 2020 |
| Urban Coatings Limited | Construction | 2026 |
| Ursa Reul Ltd | Health & social care | 2025 |
| Ushaanand Ltd | Real estate | 2019 |
| Uszs Financial Consulting Limited | Administrative & support | 2016 |
| V Satish Limited | Other services | 2010 |
| V-Source UK Ltd | Administrative & support | 2016 |
| Vachi Ventures Limited | Administrative & support | 2022 |
| Vaiopak Limited | Administrative & support | 2005 |
| Vale Pet Foods Limited | Manufacturing | 2019 |
| Valsamakis Ltd | Health & social care | 2019 |
| Van Wattingen Limited | Other services | 2013 |
| Vanfast Limited | Transport & logistics | 2003 |
| Vascular Europe Ltd. | Health & social care | 2019 |
| Vccy Limited | Health & social care | 2020 |
| Vectio Consulting Limited | Transport & logistics | 2015 |
| Vehicle Marketing Direct Ltd | Professional & scientific | 2015 |
| VEL Properties Limited | Real estate | 2016 |
| Venate Ltd | Information & communication | 2024 |
| Veridis Studio Limited | Manufacturing | 2026 |
| Verismart Coventry & Leamington Spa Limited | Real estate | 2021 |
| Verity Enterprises Limited | Health & social care | 2014 |
| Vertex IT Leadership Ltd | Information & communication | 2025 |
| Vetroprint Limited | Manufacturing | 2001 |
| Vibe Beauty and Training Ltd | Other services | 2023 |
| Video Analysis Solutions Limited | Professional & scientific | 2011 |
| Vieta Restaurant Ltd | Hospitality | 2021 |
| VIL International Ltd | Administrative & support | 2019 |
| Vintage & Bespoke Ltd | Administrative & support | 2018 |
| Vintstreet Ltd | Wholesale & retail | 2023 |
| VIP Wealth Management Ltd | Financial services | 2019 |
| Viriya Solutions Ltd | Professional & scientific | 2015 |
| Virtual CMO Ltd | Professional & scientific | 2017 |
| Viscell Limited | Manufacturing | 2011 |
| Visionaries Learning Centre CIC | Education | 2018 |
| Vits Global Manufacturing Limited | Manufacturing | 2007 |