| Superhero Series International Ltd | Other services | 2022 |
| Supersmart Repairs Limited | Wholesale & retail | 2005 |
| Supply Chain Finance Solutions Limited | Professional & scientific | 2019 |
| Support Hands Domiciliary Care Ltd | Health & social care | 2021 |
| Surefire Services Ltd. | Manufacturing | 1993 |
| Sureway Traffic Control Ltd | Construction | 2026 |
| Surrey Internet Services Limited | Professional & scientific | 1995 |
| Sustainable Natural Wealth (SNW) Limited | Administrative & support | 2025 |
| SV Crane Ltd | Construction | 2016 |
| Sway Consultants Ltd | Professional & scientific | 2020 |
| Swiftbow Limited | Professional & scientific | 1977 |
| Sylhet Eats Ltd | Hospitality | 2025 |
| Symposium Brands Limited | Extraterritorial | 2018 |
| System Method Building Limited | Construction | 2000 |
| System Method Holdings Limited | Financial services | 2021 |
| T & a Tradeline Ltd | Wholesale & retail | 2016 |
| T E Racing Limited | Arts & recreation | 2016 |
| T&T Fuels Limited | Wholesale & retail | 2024 |
| T&T Marketric Ltd | Wholesale & retail | 2021 |
| T&T Mart Ltd | Wholesale & retail | 2024 |
| T.K. Props Ltd | Information & communication | 2022 |
| T.M Advice Services Ltd | Professional & scientific | 2019 |
| T.M Property Manager Ltd | Real estate | 2019 |
| TAC Assosciates Limited | Health & social care | 2024 |
| Tack & Tweed Ltd | Professional & scientific | 2020 |
| TAG Medical Limited | Professional & scientific | 2007 |
| Tarasco Limited | Administrative & support | 2016 |
| Tarasco Property Ltd | Real estate | 2023 |
| Tarco Ltd | Financial services | 2017 |
| Task Force Developments Limited | Construction | 2016 |
| Task Force Properties & Investments Limited | Real estate | 1980 |
| Tayside Renewable Energy Services Limited | Construction | 2025 |
| TB Alliance (UK) Limited | Wholesale & retail | 2026 |
| TCG Medix UK Limited | Health & social care | 2017 |
| TCS Turf Equip Limited | Professional & scientific | 2017 |
| Team Kinetix Limited | Arts & recreation | 2015 |
| Team Synergy Ltd | Professional & scientific | 2005 |
| Teasel Management Limited | Professional & scientific | 2011 |
| Technology Business Services Limited | Information & communication | 2009 |
| Technology Wellbeing Ltd | Professional & scientific | 2003 |
| Technosar Ltd | Wholesale & retail | 2022 |
| Tecniq Ltd | Manufacturing | 2015 |
| Tellum Holdings Ltd | Financial services | 2024 |
| Temple Carr Ltd | Real estate | 2026 |
| Templemans Holding Ltd | Extraterritorial | 2025 |
| TEN Square Consulting Ltd | Administrative & support | 2021 |
| TEN TEN Chick'N Limited | Hospitality | 2025 |
| TEP Logistics Ltd | Transport & logistics | 2026 |
| Termoli Developments Limited | Real estate | 2024 |
| Tern Holdings Limited | Construction | 2018 |
| Tern Investments Limited | Real estate | 2020 |
| Terra Pactum Ltd. | Real estate | 2010 |
| Terrechem Amenity Limited | Administrative & support | 2017 |
| Terrechem Limited | Administrative & support | 2010 |
| Teseo UK Ltd | Manufacturing | 2011 |
| Tesla Developments Ltd | Construction | 2017 |
| Tesla Group Ltd | Construction | 2016 |
| Tesla M&E Ltd | Construction | 2022 |
| Texo DSI Limited | Construction | 2016 |
| Texo Group Limited | Manufacturing | 2018 |
| Texo Port Services Limited | Transport & logistics | 2020 |
| Texo Recruitment Limited | Administrative & support | 2020 |
| Texo Rope Access and Inspection Ltd | Construction | 2016 |
| Texo Special Projects Ltd | Construction | 2016 |
| Texzone AI4D Ltd | Extraterritorial | 2018 |
| Texzone Ltd | Extraterritorial | 2018 |
| THE Agency Room Limited | Other services | 2024 |
| THE Atlantic Wharf Wapping Limited | Real estate | 2015 |
| THE Awesomeness Project C.I.C. | Education | 2024 |
| THE Barn Nursery School Colne Engaine Limited | Education | 2023 |
| THE Barn Nursery School Limited | Education | 2015 |
| THE Barrelab Witham Limited | Arts & recreation | 2026 |
| THE Bear at Wickham Bishops Limited | Hospitality | 2024 |
| THE Belmont TAP Ltd | Hospitality | 2026 |
| THE Belvia Construction Company Ltd | Construction | 2021 |
| THE Braxted Bakery Ltd | Hospitality | 2018 |
| THE Bunker Below Ltd | Arts & recreation | 2025 |
| THE Bush RUM Co Ltd | Extraterritorial | 2021 |
| THE Cambridge Motor Company Limited | Wholesale & retail | 2013 |
| THE City of London GIN Company Limited | Manufacturing | 2006 |
| THE Cliff Trading Co Limited | Hospitality | 2015 |
| THE COD Father Silver END Limited | Hospitality | 2016 |
| THE Curious Caterpillar Partyware Limited | Wholesale & retail | 2011 |
| THE Deans Office Limited | Wholesale & retail | 2021 |
| THE Dog Wash Essex Ltd | Other services | 2025 |
| THE Dolls Boutique Essex Ltd | Arts & recreation | 2024 |
| THE Financial Solutions Partnership Limited | Financial services | 1997 |
| THE Fulfillment Company Limited | Transport & logistics | 2011 |
| THE George PH Witham Limited | Hospitality | 2025 |
| THE Green Suitcase Co. Limited | Manufacturing | 2012 |
| THE Hearts Club Bar and Restaurant Ltd | Hospitality | 2025 |
| THE Last Survivors Ltd | Arts & recreation | 2016 |
| THE Manifest Voting Agency Limited | Information & communication | 1994 |
| THE Meads (Little Canfield) Management Company Ltd | Households | 2017 |
| THE Naked Gardeners Limited | Administrative & support | 2018 |
| THE New Aviator Consulting Company Limited | Professional & scientific | 2017 |
| THE Newlands Butchers Ltd | Wholesale & retail | 2012 |
| THE Passion Magazine Limited | Professional & scientific | 2002 |
| THE Physio Rooms Limited | Health & social care | 2026 |
| THE Podiatry Foot Clinic Essex Ltd | Health & social care | 2025 |