| TSBA Group |
| TSG Consumer Partners |
| Tsinghua University |
| TSP London Limited |
| Tudem Egitim Hizetleri Sanayi ve Ticaret Anonim Sirketi |
| TUI AG |
| Turcan Connell Solicitors |
| Tutors and Exams International Limited |
| Tutors and Exams Limited |
| Twaweza Communications Limited |
| Twining Crosfield & Co Limited |
| Tyne Chease Limited |
| Typhoo Tea Ltd |
| UCC Coffee UK Limited |
| UCC Holdings Co Limited |
| UCLC Consultants Ltd |
| UEFA Club Competitions Online Store |
| Uganda National English Language Teachers’ Association (UNELTA) |
| UK Research and Innovation [UKRI] |
| Ukrainian Institute London |
| Ulster Bank |
| Ultra Glow Cosmetics Ltd |
| Umbrellium Limited |
| Under Armour, Inc |
| Underground Poems CIC |