| T&M Enterprise Limited | Hospitality | 2020 |
| T&O Property Lettings Limited | Households | 2024 |
| T&T Havens Limited | Real estate | 2024 |
| T.D.B. Installations Limited | Construction | 2006 |
| T.W Handling Ltd | Administrative & support | 2023 |
| Tableplanner Ltd | Information & communication | 2026 |
| TAG Enterprises Ltd | Wholesale & retail | 2020 |
| Take IT ALL Removals Ltd | Water & waste | 2025 |
| Takeaways R US UK Limited | Hospitality | 2022 |
| Talabi Health Ltd | Information & communication | 2026 |
| Talent Solution Partners Ltd | Administrative & support | 2023 |
| Talepine Limited | Wholesale & retail | 1984 |
| Talisman Administration Services Ltd | Administrative & support | 2023 |
| Talk Leisure Limited | | 2010 |
| Taltreuddyn Fawr Management Ltd | Households | 2024 |
| Tamba Heating&Gas Solutions Ltd | Construction | 2025 |
| Tamkudi Limited | Wholesale & retail | 2024 |
| Tamtad Global Solutions Ltd | Wholesale & retail | 2026 |
| Tanker Fuel Services Ltd | Professional & scientific | 2018 |
| Tannus International Limited | Wholesale & retail | 2018 |
| Tannus UK Ltd | Wholesale & retail | 2022 |
| Tara Partners Ltd | Construction | 2011 |
| Tashfran Holdings Ltd | Financial services | 2020 |
| Task Maintenance Ltd | Construction | 2025 |
| Tastail Limited | Information & communication | 2008 |
| Tasty Thai Takeaway 15 Ltd | Hospitality | 2023 |
| Tatdn Enterprises Ltd | Wholesale & retail | 2025 |
| Taxelance Ltd | Professional & scientific | 2025 |
| Taxwise Solution Limited | Professional & scientific | 2023 |
| Taylor Developments (Hockley) Limited | Construction | 1986 |
| Taylor Scaffolding Ltd | Construction | 2010 |
| Taylormade Decorating Limited | Construction | 2022 |
| TB Continuity Limited | Professional & scientific | 2007 |
| TBD Holdings Ltd | Financial services | 2015 |
| TBS Painting and Decorating Ltd | Construction | 2021 |
| Tcmf Limited | Other services | 2013 |
| Tcsl Limited | Information & communication | 2023 |
| TDL Developers Limited | Construction | 2023 |
| Team Artemis Limited | Information & communication | 2018 |
| Team Management Limited | Administrative & support | 2015 |
| Team Properties Limited | Financial services | 2013 |
| Teasha Group Ltd | Manufacturing | 2026 |
| Tech Bay Solutions Ltd | Information & communication | 2011 |
| Tech H Limited | Wholesale & retail | 2025 |
| Tech-Craft-Gifts Ltd | Wholesale & retail | 2026 |
| Techhunters Recruitment Ltd | Administrative & support | 2022 |
| Techmarcon Limited | Education | 2015 |
| Technet Corporation UK Ltd | Wholesale & retail | 2020 |
| Technical Programming Ltd | Information & communication | 2020 |
| Tedd Ltd | Transport & logistics | 2025 |
| Teetalks Ltd | Health & social care | 2025 |
| Telford Financial Ltd | Financial services | 2022 |
| Tema Limited | Wholesale & retail | 2018 |
| Temi Audio Ltd | Information & communication | 2026 |
| Tempfencing 24/7 Ltd | Construction | 2019 |
| Temple Farm Holdings Ltd | Real estate | 2009 |
| Temple Sutton Management Limited | Households | 1997 |
| TEN Twenty Properties Ltd | Real estate | 2025 |
| Tender Orchid Ltd | Health & social care | 2019 |
| Tenk Ltd | Information & communication | 2022 |
| Teof Ltd | Administrative & support | 2016 |
| Terrorhertz Ltd | Information & communication | 2024 |
| Terry Kirwan Limited | Construction | 2014 |
| Test Valley Home Improvements Limited | Construction | 2026 |
| Tetraglin Civils & Structural Engineering Limited | Professional & scientific | 2024 |
| Textminder Limited | Information & communication | 2021 |
| TG (Intl) Ltd | Professional & scientific | 2022 |
| TG Security Ltd | Administrative & support | 2025 |
| Thain and SON Limited | Real estate | 2023 |
| Thaitans Group Ltd | Financial services | 2023 |
| Thames Business Group Limited | Wholesale & retail | 2023 |
| Thames Gateway Airport Limited | Administrative & support | 2004 |
| That's Showbiz! LIZ Ltd | Information & communication | 2026 |
| Thatched House Farm LLP | | 2020 |
| THE Altgrain Company Ltd | Wholesale & retail | 2019 |
| THE Art of Joca Limited | Manufacturing | 2022 |
| THE Artist Cake - Luxury Cake Ltd | Hospitality | 2023 |
| THE Athenaeum Club Limited | Arts & recreation | 2002 |
| THE BAG Shop Ltd | Wholesale & retail | 2019 |
| THE Balance of Things Ltd | Wholesale & retail | 2021 |
| THE Bay Botanical Ltd | Hospitality | 2019 |
| THE Bay Fish and Chips Ltd | Hospitality | 2018 |
| THE Beach HUT Southend Limited | Hospitality | 2022 |
| THE Bespoke Bookkeeper Ltd | Professional & scientific | 2025 |
| THE Best Barbers of Sea END Ltd | Other services | 2022 |
| THE BIZ DEV Coach Ltd | Professional & scientific | 2025 |
| THE Board Game HUT Limited | Wholesale & retail | 2016 |
| THE Bowen Homes Limited | Real estate | 2020 |
| THE Brackens (Thundersley) Management Company Limited | Real estate | 2015 |
| THE Branch Spot Limited | Hospitality | 2024 |
| THE Brave MMA Academy Ltd | Arts & recreation | 2018 |
| THE Business Coaching Group Limited | Professional & scientific | 2002 |
| THE Business Supply Network Limited | Wholesale & retail | 2014 |
| THE Business Supply Network UK Limited | Wholesale & retail | 2018 |
| THE Casting Portal Limited | Administrative & support | 2025 |
| THE Chelmsford Consultancy LLP | | 2016 |
| THE Christmas Fayre Company Limited | Hospitality | 2025 |
| THE Closest Thing to Magic Limited | Professional & scientific | 2012 |
| THE Club Shop Ltd | Manufacturing | 2025 |
| THE Coal MEN Limited | Construction | 2021 |