| Tdpa IT House Limited | Information & communication | 2025 |
| Tdpinvest Ltd | Real estate | 2025 |
| TDU Europe Limited | Wholesale & retail | 2008 |
| TE BAN & Co Limited | Professional & scientific | 2015 |
| Tea Embassy Limited | Wholesale & retail | 2023 |
| Team A5 Healthcare Training Centre Ltd | Information & communication | 2020 |
| Team A5 Limited | Administrative & support | 2014 |
| Team A5 Support | Hospitality | 2018 |
| Team Accountants Limited | Professional & scientific | 2015 |
| Team Investment Units Limited | Real estate | 2021 |
| Team Raiola LLP | | 2025 |
| Team Rate Shipping & Transport Limited | Administrative & support | 2014 |
| Team Solid Amateur Boxing Club Limited | Arts & recreation | 2024 |
| Team Solutions Network Limited | Wholesale & retail | 2018 |
| Tearisci Limited | Real estate | 2008 |
| TEC Interiors Limited | Construction | 2016 |
| TEC Surrey Limited | Construction | 2006 |
| Tech a W Ltd | Information & communication | 2017 |
| Tech Champs Limited | Information & communication | 2023 |
| Tech Geek 19 Ltd | Wholesale & retail | 2019 |
| Tech House Gadgets Ltd | Wholesale & retail | 2019 |
| Tech IR Limited | Wholesale & retail | 2024 |
| Tech Less Limited | Wholesale & retail | 2022 |
| Tech Luggage & Vapes Ltd | Wholesale & retail | 2025 |
| Tech Luggage Ltd | Wholesale & retail | 2019 |
| Tech on Click Ltd | Wholesale & retail | 2025 |
| Tech Quality Retail Limited | Wholesale & retail | 2025 |
| Tech Trade in Ltd | Wholesale & retail | 2015 |
| Tech Village London Ltd | Wholesale & retail | 2019 |
| Techandmore Ltd | Wholesale & retail | 2025 |
| Techbrain IT Solutions Ltd | Information & communication | 2020 |
| Techforce Solutions Ltd. | Information & communication | 2014 |
| Techmanic Limited | Wholesale & retail | 2018 |
| Technimove Holdings Limited | Information & communication | 2012 |
| Technimove Limited | Information & communication | 1998 |
| Technimove Spitfire Limited | Information & communication | 2012 |
| Techniphone Ltd | Wholesale & retail | 2025 |
| Techno Care Ltd | Wholesale & retail | 2017 |
| Techno Scaffolding Limited | Construction | 2016 |
| Technocraft IT Solution Ltd | Information & communication | 2024 |
| Techsalis Limited | Information & communication | 2025 |
| Techstand Limited | Other services | 2020 |
| Techstone Limited | Wholesale & retail | 2015 |
| Techzenm Ltd | Information & communication | 2026 |
| Tecnino Ltd | Information & communication | 2024 |
| Tecspur Limited | Administrative & support | 2010 |
| Teddington Trading Company Limited | Transport & logistics | 1998 |
| Teddington Wharf Estate Management Limited | Households | 2010 |
| Teddy Bear Nannies and Maternity Limited | Manufacturing | 2020 |
| Tedsfarm Ltd | Wholesale & retail | 2025 |
| TEE Consults Ltd | Construction | 2026 |
| TEE Electrics Ltd | Manufacturing | 2018 |
| Tee-Box-Units Limited | Construction | 2015 |
| Teebraidz Ltd | Other services | 2025 |
| Teecee Ventures Limited | Professional & scientific | 2023 |
| Teeparam Exchange Limited | Financial services | 2017 |
| Teeparam Freight Ltd | Transport & logistics | 2025 |
| Teeth by ALE Ltd | Health & social care | 2024 |
| Tejjers Ltd | Professional & scientific | 2018 |
| TEK Energy Ltd | Construction | 2012 |
| Tek-Time Ltd | Information & communication | 2021 |
| Tekcomm Limited | Wholesale & retail | 2017 |
| Teknic Refrigeration Ltd | Manufacturing | 2006 |
| Telamara Limited | Wholesale & retail | 2019 |
| Telecom 9000 Limited | Information & communication | 2014 |
| Telford's Quay (Management Company) Limited | Households | 1989 |
| Telio Group Ltd | Wholesale & retail | 2026 |
| Telius Group Ltd | Administrative & support | 2025 |
| Telugu Maatalu in UK Ltd | Information & communication | 2025 |
| Temaki Restaurants Ltd | Hospitality | 2025 |
| Temies Cash and Carry Superstore Limited | Manufacturing | 2025 |
| Temmylj Ltd | Wholesale & retail | 2023 |
| Temp Inter Consult (UK) Limited | Professional & scientific | 2010 |
| Temple Bodies | Education | 2016 |
| Temple Cloud Finance House Limited | Financial services | 2020 |
| Templebridge Apartments (Bristol) Management Company Limited | Households | 2008 |
| Templecroft Limited | Real estate | 1991 |
| Templefields a Resi LLP | | 2015 |
| Templefields B Resi LLP | | 2015 |
| Templefields House LLP | | 2015 |
| Templeton Cleaning Services Limited | Administrative & support | 2003 |
| Templetons Cleaning Limited | Administrative & support | 2011 |
| Temporary Climate Solutions Ltd | Construction | 2020 |
| TEN10 Consulting Services Limited | Information & communication | 2020 |
| TEN10CARE Services Ltd | Health & social care | 2019 |
| TEN90 Recruitment Group Ltd | Administrative & support | 2019 |
| Tenacity XV Limited | Professional & scientific | 2016 |
| Tender Love & Affection Ltd | Information & communication | 2021 |
| Tender Therapeutic Ltd | Health & social care | 2024 |
| Tenderoots Healthcare Services Ltd | Public administration | 2025 |
| Tenlowe Ltd | Professional & scientific | 2025 |
| Tennisonproperty LLP | | 2008 |
| Tennyson Stores Limited | Wholesale & retail | 2013 |
| Tent 1 Management Company Limited | Households | 2017 |
| Tentario Limited | Administrative & support | 2013 |
| Tentex Limited | Administrative & support | 1989 |
| Tenurepurpose Property Management Limited | Households | 1996 |
| TEO Construction Ltd | Construction | 2023 |
| Teotta Drive (Tettenhall) Management Company Limited | Extraterritorial | 2011 |
| Tera HI Tera Store Limited | Wholesale & retail | 2026 |