| Summit Structures Plant Ltd | Construction | 2021 |
| Summit Structures Property Ltd | Real estate | 2024 |
| Sunny BI Ltd | Information & communication | 2022 |
| Sunsave 12 (Derriton Fields) Ltd | Energy | 2012 |
| Sunsave 25 (WIX Lodge Farm) Limited | Energy | 2013 |
| Super Htbf Investments Limited | Real estate | 2024 |
| Surrey EC Ltd | Wholesale & retail | 2022 |
| Survival Leisure Co. Limited | Real estate | 1996 |
| Swift Hand Finishers Limited | Other services | 1996 |
| Swilken of ST Andrews Ltd | Wholesale & retail | 2013 |
| Swish Properties Ltd | Construction | 2020 |
| Swiss Limited | Construction | 2005 |
| Synvia Tech Ltd | Wholesale & retail | 2025 |
| T and I Limited | Other services | 1973 |
| Tablet Limited | Real estate | 2020 |
| Tagenergy UK Finance 1 Ltd | Financial services | 2023 |
| Tailored Accommodation Solutions Ltd | Real estate | 2023 |
| Tailored and Hicks Ltd | Real estate | 2024 |
| Tailored Property Coaching Ltd | Education | 2023 |
| Tailored Property Management Ltd | Administrative & support | 2024 |
| Tainte Ltd | Financial services | 2025 |
| Talcon Recruitment Group Limited | Administrative & support | 2026 |
| Talcon Recruitment UK Limited | Administrative & support | 2025 |
| Tamarix Solutions Limited | Professional & scientific | 2014 |
| Tanolicious Addlestone Ltd | Other services | 2025 |
| Tanolicious Ltd | Other services | 2023 |
| Tashkoo Limited | Information & communication | 2010 |
| Tazer Electrical Services Ltd | Construction | 2025 |
| TCN Office Services Limited | Administrative & support | 2012 |
| Teachology Ltd | Education | 2013 |
| Team Construction Limited | Administrative & support | 2003 |
| Team Data IT Services Limited | Professional & scientific | 2012 |
| Techflex Solutions Limited | Information & communication | 2024 |
| Tekconsult Limited | Information & communication | 2018 |
| Tendara Solutions Ltd | Construction | 2025 |
| Testbusters UK Holdings Ltd | Financial services | 2023 |
| TFE Agency UK Limited | Administrative & support | 2020 |
| TG Capital Advisors Limited | Professional & scientific | 2024 |
| Thattutor Ltd | Education | 2023 |
| THE Book Trade Charity (Btbs) | Other services | 2008 |
| THE Brown Suite Limited | Arts & recreation | 2025 |
| THE Clay Garden 2 Ltd | Wholesale & retail | 2022 |
| THE Clay Garden 3 Ltd | Wholesale & retail | 2022 |
| THE Clay Garden Holdings Ltd | Financial services | 2022 |
| THE Deep Scrub Club Ltd | Administrative & support | 2024 |
| THE Doctor's Kitchen Limited | Information & communication | 2016 |
| THE Essence Group UK Limited | Hospitality | 2021 |
| THE FBA Alliance Limited | Education | 2022 |
| THE Floor Collection Limited | Construction | 2022 |
| THE Formwork Factory Limited | Manufacturing | 2023 |
| THE Friends of Longspring Wood | Arts & recreation | 2026 |
| THE Green Floor Company Ltd | Administrative & support | 2014 |
| THE Heath RMC Limited | Households | 2022 |
| THE Ironing Board Limited | Other services | 2009 |
| THE Marketing Train Ltd | Administrative & support | 2019 |
| THE Old Apostolic Church (England) | Other services | 2016 |
| THE Orchard (Hadham) Residents Management Company Limited | Households | 2022 |
| THE Orchard Apartments (Hadham) Residents Management Company Limited | Households | 2023 |
| THE Other Studio Ltd | Information & communication | 2025 |
| THE Project Collective Ltd | Information & communication | 2025 |
| THE Samuel Ryder Foundation | Education | 2011 |
| THE Severn Partnership Limited | Professional & scientific | 2002 |
| THE Shires (Chipperfield) Management Limited | Households | 2004 |
| THE Sober Club Ltd | Administrative & support | 2022 |
| THE Transparent Group Limited | Financial services | 2022 |
| THE Turley Bensons Ltd | Real estate | 2023 |
| THE UK Fertility Group Ltd | Professional & scientific | 2025 |
| THE Unicorn Public House Limited | Hospitality | 2003 |
| THE World X Ltd | Wholesale & retail | 2025 |
| THE Write Technology Limited | Professional & scientific | 2003 |
| THE ZA GUY Ltd | Professional & scientific | 2026 |
| Therapyaudit Limited | Information & communication | 2005 |
| Theravet Limited | Professional & scientific | 2001 |
| Think Social Ltd | Professional & scientific | 2022 |
| Thpb Ltd | Wholesale & retail | 2015 |
| Tia's Home Made Bakes Ltd | Hospitality | 2022 |
| TIM Shaw Limited | Wholesale & retail | 2022 |
| Timeless Tokens Ltd | Wholesale & retail | 2024 |
| Titanoboa Ltd | Information & communication | 2022 |
| Tooveys Mill Management Limited | Households | 1983 |
| Toslel Limited | Information & communication | 2025 |
| Total Tax Intelligence Limited | Extraterritorial | 2007 |
| Totg.Uk Ltd | Health & social care | 2021 |
| Tranche 1 Holdings Limited | Professional & scientific | 2011 |
| Tranche 2 Holdings Limited | Professional & scientific | 2011 |
| Tranche 3 Holdings Limited | Professional & scientific | 2011 |
| Tranche 5 Limited | Professional & scientific | 2013 |
| Transparent Specialist Finance Limited | Financial services | 2020 |
| Transvolve Consultancy Limited | Information & communication | 2020 |
| Trewick Health Ltd | Health & social care | 2026 |
| Triconch Ltd | Real estate | 2021 |
| TRU2CARE Ltd | Health & social care | 2023 |
| Truenorth Ltd | Real estate | 1997 |
| Turnpoint Solutions Limited | Professional & scientific | 2014 |
| Turquoise Mobile Limited | Information & communication | 2011 |
| Tutorwise Ltd | Education | 2014 |
| Twin LDN Ltd | Information & communication | 2015 |
| TWJ Investments Limited | Real estate | 2024 |
| Tyga Marketing Limited | Professional & scientific | 2006 |
| Typedb Ltd | Information & communication | 2013 |