| THE London Pain Network Limited | Health & social care | 2019 |
| THE Longest Night Ltd | Information & communication | 2024 |
| THE Maestri Limited | Other services | 2015 |
| THE Marylebone Garden Company Limited | Professional & scientific | 2019 |
| THE Mckenzie Friend UK Network Ltd | Information & communication | 2020 |
| THE Meon Survey Partnership Limited | Professional & scientific | 1997 |
| THE Merchant Barista Ltd | Wholesale & retail | 2021 |
| THE Mortgage View Ltd | Financial services | 2023 |
| THE Oaks Management Co. (Medstead) Limited | Administrative & support | 1995 |
| THE Old Hampshire Brickworks Ltd | Real estate | 2022 |
| THE Photocopier Company Ltd | Other services | 2008 |
| THE Privett Centre Educational, Arts and Events Ltd | Education | 2023 |
| THE Property Movement Ltd | Real estate | 2018 |
| THE Ranch Farm Investment Company Ltd | Financial services | 2026 |
| THE Surrey and Hants Tree Company Limited | Agriculture & fishing | 2010 |
| THE Swan at Ullesthorpe Limited | Hospitality | 2021 |
| THE Swan Inn Barton Stacey Limited | Hospitality | 2018 |
| THE Sycamore II Property Development Fund | | 2008 |
| THE Sycamore IV Mezzanine Finance Fund LLP | | 2009 |
| THE Sycamore Strategic Land Fund | | 2006 |
| THE Talbot Coaching Inn Limited | Hospitality | 2018 |
| THE Towbar MAN (South) Limited | Professional & scientific | 2003 |
| THE Transformation Works Limited | Professional & scientific | 2022 |
| THE Tricycle Shop Limited | Wholesale & retail | 2012 |
| THE Unusual Tourist Limited | Wholesale & retail | 2018 |
| THE Vegan Bakes Ltd | Hospitality | 2021 |
| THE Weather Perspective Ltd | Professional & scientific | 2015 |
| THE Wedding Box Ltd | Construction | 2025 |
| THE Well IP Limited | Information & communication | 2019 |
| THE Well Productions SPV Limited | Information & communication | 2019 |
| THE White Private Practice Ltd | Administrative & support | 2020 |
| THE Whitedown Girls Limited | Households | 2015 |
| THE Windmills Management Company (1993) Limited | Households | 1993 |
| THE Wright Roofers Ltd | Construction | 2026 |
| THE YES YES Company Ltd | Manufacturing | 2005 |
| Thedden Grange Residents Association Limited | Households | 1975 |
| Thelittlegreycellsuk Limited | Professional & scientific | 2019 |
| Therapy Room Rental Ltd | Other services | 2017 |
| Thinking Shop Limited | Professional & scientific | 2019 |
| Thinktalk Limited | Extraterritorial | 2016 |
| Third Hand Healthcare Ltd | Health & social care | 2014 |
| Third Hand Youth Services Ltd | Health & social care | 2024 |
| Thistle Coast Holdings Ltd | Real estate | 2023 |
| Thomann UK Ltd | Wholesale & retail | 2008 |
| Thomas (Hampshire) Ltd. | Transport & logistics | 1998 |
| Thomas Global Limited | Wholesale & retail | 2024 |
| Thompson Software Limited | Information & communication | 2017 |
| Thorn SDS Limited | Professional & scientific | 2024 |
| Thorness Ltd | Other services | 2014 |
| Thorneycroft Services Ltd | Professional & scientific | 2006 |
| THR UK Media & Publishing Limited | Professional & scientific | 2025 |
| Three Fifty-Nine Ltd | Professional & scientific | 2023 |
| Three Monkeys Retail Ltd | Wholesale & retail | 2011 |
| Three Sisters Art Ltd | Wholesale & retail | 2025 |
| Thrive Property Collective Limited | Real estate | 2026 |
| Thunder Systems Ltd | Information & communication | 2012 |
| Tiakyfee Consultants Limited | Professional & scientific | 2018 |
| Tiakyfee Holdings Ltd | Financial services | 2019 |
| Tickers BOY Ltd | Arts & recreation | 2012 |
| TIM Hart Tattoo Ltd | Other services | 2024 |
| Timecatch Ltd | Information & communication | 2026 |
| Timeless Reflections Limited | Health & social care | 2024 |
| Timms Property Services Limited | Real estate | 2015 |
| Tinslinger Limited | Information & communication | 2012 |
| Tiny Tinkers Tales Ltd | Manufacturing | 2026 |
| Tisimmo Ltd | Wholesale & retail | 2023 |
| TKF Rentals Limited | Hospitality | 2025 |
| TKT Properties Ltd | Real estate | 2025 |
| TLR Investment Group Limited | Financial services | 2025 |
| TM Alton Limited | Hospitality | 2024 |
| TMM Builders Ltd | Construction | 2024 |
| TMS Payroll Limited | Administrative & support | 2026 |
| TMT-7 Limited | Construction | 2023 |
| TOM & Joy Investments (UK) Limited | Real estate | 2007 |
| TOM Chauffeurs Ltd | Transport & logistics | 2022 |
| Toni & GUY (Harrow) Limited | Other services | 2004 |
| Toni & GUY (Lease Sudbury) Limited | Other services | 2010 |
| Toni & GUY (South East) Limited | Professional & scientific | 2004 |
| Toni & GUY (South) Limited | Professional & scientific | 1995 |
| Toni & GUY Accessories Limited | Other services | 2014 |
| Toni & GUY Holdings Limited | Professional & scientific | 2002 |
| Toni & GUY International Limited | Professional & scientific | 2009 |
| Toni & GUY Limited | Financial services | 1989 |
| Toni & GUY North Limited | Professional & scientific | 1994 |
| Toni & GUY UK Training Limited | Education | 2006 |
| Tony Durham Consulting Limited | Professional & scientific | 2017 |
| Tootell Technical Services Ltd | Professional & scientific | 2018 |
| Top Spec Media Ltd | Information & communication | 2025 |
| Total Asset Solutions Limited | Financial services | 2001 |
| Total Power Team Limited | Arts & recreation | 2019 |
| Touch of Purple Limited | Other services | 2007 |
| Town & Country Couriers (UK) Limited | Transport & logistics | 2003 |
| Town & Country Couriers Limited | Extraterritorial | 2012 |
| Trace Element Associates Limited | Professional & scientific | 2001 |
| Tradesserve Ltd | Information & communication | 2018 |
| Tradex Roofing & Property Maintenance Ltd | Construction | 2025 |
| Traffi Safe Ltd | Wholesale & retail | 2008 |
| Traffisafe Export Holding Company Limited | Financial services | 2023 |
| Traffisafe Holding Company Limited | Financial services | 2016 |
| Transform Digital Ltd | Professional & scientific | 2021 |