| T&I Partners Ltd | Administrative & support | 2020 |
| T4 Rentals Ltd | Real estate | 2023 |
| Tactical Enterprise Global Training Services Ltd | Administrative & support | 2012 |
| Tactical Enterprise Limited | Other services | 2007 |
| TAI LJ Ltd | Information & communication | 2023 |
| Tailored for Living Ltd | Administrative & support | 2026 |
| Tailsippers Ltd | Manufacturing | 2026 |
| Talib's Medical Consultancy Limited | Health & social care | 2021 |
| Tarchie Capital Ltd | Professional & scientific | 2023 |
| Targa Services Ltd | Information & communication | 2016 |
| Tate Controls Ltd | Professional & scientific | 2018 |
| TB Care Services Limited | Health & social care | 2017 |
| Tbip Ltd | Professional & scientific | 2025 |
| Tblng Limited | Wholesale & retail | 2022 |
| TBS Boats Hamble Limited | Wholesale & retail | 2015 |
| TBS Boats Harleyford Ltd | Wholesale & retail | 2026 |
| TBS Boats Penton Hook Limited | Wholesale & retail | 1998 |
| Tea Haven Ltd | Real estate | 2023 |
| Tech Genesis Ltd | Information & communication | 2018 |
| Techtron Limited | Manufacturing | 1980 |
| Tectonic IP Limited | Professional & scientific | 2012 |
| Teemz Ltd | Administrative & support | 2022 |
| Telling Secrets Limited | Arts & recreation | 2023 |
| Tergar Design Ltd | Construction | 2020 |
| TF Advisory Limited | Information & communication | 2026 |
| Thamesway Contractors Limited | Construction | 2014 |
| Tharani Holdings Limited | Financial services | 2025 |
| Tharani Properties Ltd | Real estate | 2023 |
| Tharani Services Ltd | Information & communication | 2017 |
| Thaw Design & Build Ltd | Construction | 2024 |
| Thaw Ltd | Energy | 2019 |
| Thaw Service & Maintenance Ltd | Energy | 2026 |
| THE Antique Village Ltd | Wholesale & retail | 2019 |
| THE Baguette Deli Limited | Hospitality | 2020 |
| THE Bourne Chertsey Ltd | Real estate | 2021 |
| THE British Water SKI & Wakeboard Federation Limited | Other services | 1967 |
| THE College of Higher Education Ltd | Education | 2009 |
| THE Company of Animals Limited | Wholesale & retail | 1986 |
| THE Compass Group Foundation | Other services | 2019 |
| THE Conductor 71 Limited | Professional & scientific | 2014 |
| THE Courtyard Chertsey Limited | Health & social care | 2007 |
| THE David Hewitt Partnership Limited | Professional & scientific | 2012 |
| THE Excelsior Insurance Company Limited | Financial services | 1989 |
| THE Force Movie Ltd | Information & communication | 2024 |
| THE Forest Folio Ltd | Real estate | 2025 |
| THE Front ROW Group of Companies Limited | Administrative & support | 2013 |
| THE Genome Consultants Limited | Health & social care | 2012 |
| THE Houseboat Consultancy Ltd | Professional & scientific | 2026 |
| THE Infinite Heart Space Ltd | Arts & recreation | 2025 |
| THE Kisomo Foundation | Education | 2004 |
| THE Logistics Corporation Consultancy Ltd | Professional & scientific | 2022 |
| THE London Sweet Shop Ltd | Wholesale & retail | 2025 |
| THE Magic Camera Company Ltd | Administrative & support | 2011 |
| THE Malthouse Kitchen Limited | Wholesale & retail | 2015 |
| THE Me&C Group Limited | Financial services | 2016 |
| THE Mocha Entertainment Milk Co Limited | Information & communication | 2025 |
| THE Muzzle Loaders' Association of Great Britain | Arts & recreation | 2002 |
| THE National Organisation for Fasd | Other services | 2003 |
| THE New Fieldwork Company (Interviewing) Limited | Professional & scientific | 1995 |
| THE New Fieldwork Company Limited | Professional & scientific | 1983 |
| THE New Fieldwork Holding Company Limited | Professional & scientific | 1993 |
| THE Nilgiris Tea Company Limited | Wholesale & retail | 2024 |
| THE Old Auction House Chertsey Freehold Limited | Real estate | 2023 |
| THE Old School Cafe LLP | | 2017 |
| THE Organisers Ltd | Administrative & support | 2013 |
| THE Oven Valeting Company Limited | Other services | 2013 |
| THE Pouring Affair Ltd | Wholesale & retail | 2026 |
| THE Rose & Key Limited | Real estate | 2025 |
| THE School BAG Company Limited | Wholesale & retail | 2024 |
| THE Sports Injury & Wellness Centres Limited | Health & social care | 2004 |
| THE Timeless Edit Ltd | Wholesale & retail | 2026 |
| THE Traditional Kitchen Company Limited | Manufacturing | 2019 |
| THE UK Pick Droppers Ltd | Transport & logistics | 2025 |
| Theta Construction Development Ltd | Construction | 2016 |
| Third EYE Consultancy Limited | Other services | 2019 |
| Thornton Marine Limited | Transport & logistics | 2010 |
| Three Strings Consulting Limited | Administrative & support | 2013 |
| Thrill Seekers Limited | Arts & recreation | 2023 |
| Thyme Lords Limited | Hospitality | 2002 |
| Thyme Property Limited | Administrative & support | 2007 |
| Thyme Tavern Ltd | Hospitality | 2025 |
| Tidycare Ltd | Health & social care | 2023 |
| Tilstone Energy Management Ltd | Administrative & support | 2009 |
| Timberline Consulting Ltd | Information & communication | 2019 |
| Time on the Thames Ltd | Administrative & support | 2018 |
| Tinguo Ltd | Hospitality | 2014 |
| Tiny Horse Ltd | Arts & recreation | 2014 |
| Tirpack Limited | Transport & logistics | 2008 |
| TK Food & Catering Consulting Ltd | Professional & scientific | 2021 |
| TM & LY Nominees UK Limited | Real estate | 2022 |
| Tmbh Limited | Professional & scientific | 2016 |
| TMG Promotions Limited | Hospitality | 2004 |
| TMG Properties (Consultant) Limited | Real estate | 2014 |
| TO the Top Roofing and Building Ltd | Construction | 2023 |
| Tomera Ltd | Information & communication | 2026 |
| Tomo Bikes Ltd | Manufacturing | 2021 |
| Tonic Associates Ltd | Professional & scientific | 2022 |
| Top Motorworkz Limited | Wholesale & retail | 2025 |
| Topnotch Tutorials Ltd | Education | 2024 |
| Torecycle Limited | Water & waste | 2017 |