| TAJ Home Innovations Ltd | Construction | 2014 |
| Takhar Building Contractors Ltd | Construction | 2026 |
| Takhar Building Services Ltd | Construction | 2019 |
| Talbot Consultancy Ltd | Real estate | 2024 |
| Talentsbrand Innovation CIC | Administrative & support | 2025 |
| Talking Elevators Limited | Manufacturing | 2005 |
| Talons & Tails Pest Control Ltd | Administrative & support | 2025 |
| Tamenad Limited | Wholesale & retail | 2014 |
| TAN & Sable Ltd | Manufacturing | 2018 |
| Tandam Properties Limited | Real estate | 2013 |
| Tape Wizz Interior Ltd | Construction | 2009 |
| Tara Plant Hire Limited | Construction | 1993 |
| Taracal Limited | Construction | 2019 |
| Target Dwellings Ltd | Real estate | 2023 |
| Tartan Homes Ltd | Other services | 2018 |
| TAS Property Management Ltd | Real estate | 2022 |
| Tashn Limited | Health & social care | 2013 |
| Taskiran Holdings Limited | Real estate | 2018 |
| Tasnim Cards and Stationery Ltd | Wholesale & retail | 2015 |
| Taste by Chianne Ltd | Hospitality | 2016 |
| Taste of Home Cornwall Ltd | Wholesale & retail | 2024 |
| Taste of Manna Ltd | Hospitality | 2024 |
| Taste of Punjab Ltd | Hospitality | 2023 |
| Taste of the Middle East Chatham Limited | Hospitality | 2025 |
| Tate Homes Ltd | Real estate | 2022 |
| Tatenda People Solutions Ltd | Administrative & support | 2021 |
| Tavern Apartments Management Company Limited | Households | 2002 |
| Tavnat Limited | Administrative & support | 2020 |
| Taydan Services Limited | Professional & scientific | 2023 |
| Taylor Tech Limited | Information & communication | 2023 |
| Taylorsanders Limited | Wholesale & retail | 2019 |
| Taymart Tasty Kitchen Limited | Hospitality | 2024 |
| TB Creative Consulting Ltd Ltd | Administrative & support | 2018 |
| Tbfb Ltd | Hospitality | 2018 |
| TBK Nano Ltd | Real estate | 2024 |
| TBS Building Services Ltd | Construction | 2019 |
| TBS Construct Ltd | Construction | 2024 |
| TBS Consultancy Limited | Information & communication | 2025 |
| TCA Contractors Ltd | Construction | 2025 |
| TCF Kent Holdings Ltd | Financial services | 2026 |
| TCM Acupuncture and Herbs Wellness Ltd | Health & social care | 2025 |
| Tcnf Limited | Information & communication | 2023 |
| TD Design Ltd | Construction | 2023 |
| TD Prestige Lettings Ltd | Real estate | 2025 |
| TD Retail Limited | Wholesale & retail | 2025 |
| TDC Construction Limited | Construction | 2019 |
| Teaf Ltd | Wholesale & retail | 2022 |
| Team Magic Ltd | Hospitality | 2016 |
| Team SUR Sangeet Limited | Arts & recreation | 2022 |
| Teamwork 4 Construction & Rail Services Ltd | Construction | 2022 |
| TEC Jointing Services Limited | Construction | 2019 |
| Techarch Limited | Information & communication | 2019 |
| Techgalaxy Consultancy Ltd | Information & communication | 2019 |
| Techie Scholars Ltd | Information & communication | 2024 |
| Technical Drain Solutions Limited | Water & waste | 2007 |
| Technical Unicorn Limited | Manufacturing | 2019 |
| Technique Construction Design Ltd | Construction | 2019 |
| Techverse Labs Ltd | Wholesale & retail | 2025 |
| Tecnis Studio, Print, Design & Embroidery Ltd | Manufacturing | 2023 |
| Tecnis Ventures Limited | Administrative & support | 2015 |
| Tector Limited | Construction | 2013 |
| Tecweld (South East) Ltd | Wholesale & retail | 2025 |
| Tedpak Properties Ltd | Real estate | 2021 |
| Teenah Healthcare Pro Limited | Health & social care | 2013 |
| Teenskillsbridge CIC | Education | 2026 |
| TEK Spek Limited | Information & communication | 2026 |
| Tekalhaus Ltd | Other services | 2013 |
| Tekodaq Limited | Health & social care | 2018 |
| Tekquest Limited | Information & communication | 2025 |
| Tekstag Ltd | Wholesale & retail | 2023 |
| Telepac Services Limited | Information & communication | 2008 |
| TELFORD88 Limited | Real estate | 2019 |
| Telle Systems Limited | Information & communication | 1997 |
| Temboltob Care Ltd | Health & social care | 2025 |
| Temitope.Adewale Limited | Health & social care | 2022 |
| Templar Education Limited | Education | 2016 |
| Temple Homes Limited | Real estate | 2025 |
| Tenplan Ltd | Professional & scientific | 2023 |
| Tentacle Business Forum Limited | Information & communication | 2025 |
| TEO & Cris Trans Ltd | Transport & logistics | 2017 |
| TEO Van Security Ltd | Wholesale & retail | 2023 |
| Teotema Beauty Ltd | Wholesale & retail | 2025 |
| Teqx Ltd | Information & communication | 2023 |
| Teraii 13 Ltd | Health & social care | 2020 |
| Terrace Estates (Gravesend) Limited | Households | 2019 |
| Terrace Tavern Food & Wine Limited | Wholesale & retail | 2015 |
| Terryleo Interiors Ltd | Construction | 2017 |
| TES Construction Limited | Construction | 2008 |
| TES Developments Kent Ltd | Real estate | 2024 |
| Teskal Consultancy Ltd | Professional & scientific | 2025 |
| Tesspay Ltd | Financial services | 2018 |
| Tetelestai Mini Mart Ltd | Wholesale & retail | 2023 |
| TG Financial Solutions Ltd | Professional & scientific | 2026 |
| TGR Capital Ltd | Financial services | 2024 |
| TGR Motorsport Ltd | Arts & recreation | 2008 |
| TH & Sons Electrical and Building Services Limited | Construction | 2022 |
| TH Roofing & Building Ltd | Construction | 2025 |
| Thaclas Courier Ltd | Transport & logistics | 2024 |
| Thai Food Bangkok Limited | Hospitality | 2023 |
| Thai Wellbeing Limited | Other services | 2023 |