| Teiger Limited | Wholesale & retail | 2018 |
| Teiger Watch Company Limited | Manufacturing | 2019 |
| Teiger Watches Limited | Wholesale & retail | 2018 |
| TEJ EYE DOC Ltd | Health & social care | 2021 |
| TEJ Prop Co Ltd | Real estate | 2023 |
| TEK Electronics Limited | Manufacturing | 2000 |
| Teknomek Holdings Limited | Professional & scientific | 2004 |
| Teknomek Limited | Manufacturing | 1986 |
| Teksupport Consultancy Ltd | Information & communication | 2024 |
| Tela Construction Ltd | Construction | 2016 |
| Telco Mobile Ltd | Information & communication | 2025 |
| Tele-Tronics V & S Sales and Services Limited | Construction | 1970 |
| Telecommunication Holdings Ltd | Extraterritorial | 2022 |
| Telemachus Recruitment Limited | Administrative & support | 2024 |
| Teleologic Limited | Information & communication | 1991 |
| Telephone Exchange Holiday Lets Limited | Hospitality | 2026 |
| Telos Group Holdings Ltd | Financial services | 2025 |
| Telu Holdings Ltd | Administrative & support | 2022 |
| Telu Payment Services Ltd | Professional & scientific | 2024 |
| Temenos Psychotherapy Limited | Extraterritorial | 2025 |
| Temoji Consulting Limited | Professional & scientific | 2024 |
| Tempest Services Limited | Information & communication | 2025 |
| Templar Corporation Limited | Administrative & support | 2018 |
| Temple Bar Norwich Ltd | Hospitality | 2024 |
| Temple Brown Limited | Professional & scientific | 2023 |
| Temple Construction Group Limited | Construction | 2017 |
| Temple Healthcare Ltd | Health & social care | 2023 |
| Temple Pathways Ltd | Health & social care | 2025 |
| Templeman Property Services Ltd | Construction | 2025 |
| Templemere Residents Association Limited | Households | 1973 |
| Temporary Recruitment Personnel Limited | Administrative & support | 2023 |
| Tempositions Ltd | Administrative & support | 2019 |
| Temptations Indian Cuisine Limited | Hospitality | 2017 |
| Tempus Management Consulting Limited | Professional & scientific | 2013 |
| Temsys Limited | Professional & scientific | 1995 |
| TEN Oak Property Management Limited | Households | 2025 |
| Tenacious Productions Ltd | Arts & recreation | 2021 |
| Tenacity Commercial Holdings Ltd | Financial services | 2022 |
| Tenacity Interiors Limited | Construction | 2003 |
| Tenbridge Developments Limited | Real estate | 1985 |
| Tend Collective Community Interest Company | Health & social care | 2025 |
| Tendercare at Zakia Centre Ltd | Health & social care | 2018 |
| Tenderhelp Ltd | Administrative & support | 2020 |
| Tenema Healthcare Ltd | Health & social care | 2024 |
| Tenex Fitness Ltd | Arts & recreation | 2022 |
| Tennessee Hold ’EM Limited | Information & communication | 2018 |
| Tennoc Architects Ltd | Professional & scientific | 2026 |
| Tennoc Developments Ltd | Real estate | 2026 |
| Tennoc Group Ltd | Construction | 2020 |
| Tennoc Homes Limited | Construction | 2020 |
| Tennoc Lettings Ltd | Real estate | 2026 |
| Tennoc Maintenance Ltd | Real estate | 2026 |
| Tennoc Plant Limited | Construction | 2020 |
| Tennoc Properties Ltd | Real estate | 2025 |
| TEO Cleaning Ltd | Administrative & support | 2016 |
| TEP Barbers Ltd | Other services | 2019 |
| TEP Consultancy Services Ltd | Real estate | 2024 |
| Tera Healthcare Ltd | Administrative & support | 2022 |
| Terand Property Ltd | Real estate | 2023 |
| Terminal One Technology Ltd | Information & communication | 2025 |
| Terra Kind Limited | Wholesale & retail | 2023 |
| Terraaqua Limited | Financial services | 2026 |
| Terrace Culture Ltd | Wholesale & retail | 2025 |
| Terralink Transport Ltd | Transport & logistics | 2026 |
| Terraloom Limited | Wholesale & retail | 2024 |
| Terram Defencell Limited | Administrative & support | 2006 |
| Terram Limited | Manufacturing | 1988 |
| Terraplanta Limited | Administrative & support | 2017 |
| Terry Champion Ltd | Construction | 2019 |
| Terry Irving Business Generation Limited | Construction | 2020 |
| Terrymand Limited | Administrative & support | 2023 |
| TES Translation Services Ltd | Administrative & support | 2018 |
| Tesla Partnership Ltd | Construction | 2010 |
| Tessellate Design Studio Ltd | Professional & scientific | 2012 |
| Tessera Connect Ltd | Information & communication | 2026 |
| Test BIT Limited | Information & communication | 2016 |
| Test Systems Strategies Inc (Europe) Limited | Information & communication | 2023 |
| Teta's House Ltd | Real estate | 2024 |
| Tetrachromacy Ltd | Financial services | 2024 |
| Tetshola&Co Ltd | Other services | 2017 |
| Teucer Wilson Ltd | Arts & recreation | 2017 |
| Texel Ltd | Wholesale & retail | 2025 |
| Texsys Ltd | Information & communication | 2022 |
| Textbook Ltd | Information & communication | 2026 |
| Textile Media Services Limited | Information & communication | 2002 |
| Textmydeal Ltd | Administrative & support | 2014 |
| Tfbm Limited | Hospitality | 2024 |
| TFC Gluten Free Limited | Hospitality | 2026 |
| TFH Management Services Ltd | Professional & scientific | 2022 |
| TFR Property Improvements Limited | Construction | 2016 |
| TFR Property Rentals Ltd | Real estate | 2020 |
| TFR Self Storage Ltd | Administrative & support | 2021 |
| TFS Express Logistics Ltd | Transport & logistics | 2017 |
| TFX Capital Ltd | Other services | 2018 |
| TG (Great Yarmouth) Ltd | Administrative & support | 2011 |
| TG Damp and Timber Ltd | Construction | 2018 |
| TGA Alliance Limited | Construction | 2022 |
| TGA Analysing Ltd | Administrative & support | 2017 |
| TGA Trading Limited | Wholesale & retail | 2018 |
| TGA UK Finance Limited | Professional & scientific | 2016 |