| Tadpole Properties Limited | | 2023 |
| TAJ Property Holdings Limited | | 2023 |
| Tala Limited | | 2022 |
| Talalla Investment Holdings Limited | | 2023 |
| Talbot Road Limited | | 2023 |
| Tallway Limited | Professional & scientific | 1996 |
| Talmin Limited | | 2023 |
| Tammersaare LP | | 2016 |
| Tamora International L.P. | | 2016 |
| Tandem Impex LP | | 2012 |
| Tanglin Limited | | 2023 |
| Tanora Corporation L.P. | | 2014 |
| Taplow Retail Ltd | | 2024 |
| Tara Associates L.P. | | 2014 |
| Tara Holdings (I.O.M) Ltd. | | 2016 |
| Tara Holdings Limited | | 2023 |
| Tara Organisation L.P. | | 2013 |
| Tara Properties Limited | | 2022 |
| Target Import/Export L.P. | | 2014 |
| Target Investments Worldwide L.P. | | 2013 |
| Tariff Street Properties Limited | | 2023 |
| Tarker Impex LP | | 2015 |
| Tarmak-Ops L.P. | | 2017 |
| Tarpein Limited | Professional & scientific | 2001 |
| Tarragona Limited | | 2023 |
| Tastevin Limited | | 2023 |
| Tatu Co Ltd | | 2023 |
| Taupo Holdings Limited | | 2023 |
| Taurus Markets L.P. | | 2013 |
| Tazetta Limited | | 2023 |
| TDL Sports Limited | | 2016 |
| Tech-Support Corporation L.P. | | 2013 |
| Techco Europe L.P. | | 2014 |
| Techcom Consulting L.P. | | 2015 |
| Techcom Europe L.P. | | 2011 |
| Techcom International L.P. | | 2015 |
| Techcom Support L.P. | | 2014 |
| Techlink L.P. | | 2014 |
| Technical Global Services L.P. | | 2010 |
| Technolink Solutions L.P. | | 2013 |
| Technology Consultants Worldwide L.P. | | 2014 |
| Technology Services International L.P. | | 2016 |
| Technology Trading IOM Limited | | 2025 |
| Techtonic Support L.P. | | 2014 |
| Tectonic Corporation L.P. | | 2013 |
| Telbrook Management L.P. | | 2010 |
| Telos (IOM) Limited | | 2015 |
| Telsea Limited | | 2022 |
| Telstar Developments L.P. | | 2015 |
| Telstar Global L.P. | | 2013 |
| Telstar Group L.P. | | 2016 |
| Telstar Holdings L.P. | | 2015 |
| Telstar Industries L.P. | | 2011 |
| Telstar Investments L.P. | | 2015 |
| Telstar Networks L.P. | | 2012 |
| Telstar Technology L.P. | | 2014 |
| Teltex Group L.P. | | 2016 |
| Temco Europe L.P. | | 2009 |
| Temco Investments L.P. | | 2014 |
| Temp Corporation L.P. | | 2014 |
| Temple Corporation L.P. | | 2013 |
| Temple Trading Company Limited | | 2024 |
| Templias Limited | | 2023 |
| Tenara Intex LP | | 2013 |
| Tenchcreek Investments Limited | Professional & scientific | 1996 |
| Tendley Properties Limited | | 2022 |
| Tenford LP | | 2015 |
| Teninvest Limited | Professional & scientific | 1996 |
| Tenon (IOM) Limited | | 2023 |
| Teodora Limited | | 2023 |
| Terex Corporation L.P. | | 2015 |
| Terex International L.P. | | 2009 |
| Terminal 5 Property Limited | | 2022 |
| Terra Light Equipment L.P. | | 2011 |
| Terreon LP | | 2015 |
| Terrion LP | | 2015 |
| Tesla Marketing L.P. | | 2008 |
| Tessa Limited | | 2023 |
| Tessa Meribel LP | | 2015 |
| Thamesgate Property Limited | | 2025 |
| Thatch Limited | | 2025 |
| THE Capital Appreciation Trust (Isle of MAN) Limited | | 2023 |
| THE Carrera Limited | | 2022 |
| THE Curtains UP Agency LP | | 2012 |
| THE Isle of MAN Steam Packet Company Limited | | 2022 |
| THE Lion CUB Limited | | 2023 |
| THE Lyme Foundation | | 2023 |
| THE Passage House Club Limited | | 2024 |
| THE Priory Haywards Heath | | 2000 |
| THE Raleigh Investment Company Limited | Professional & scientific | 1927 |
| THE Real MAN Pizza Company Limited | | 2011 |
| THE Wentworth Family Trust | | 2023 |
| Theale Limited | | 2023 |
| Theobalds Park Property Limited | | 2022 |
| Theseus Prop Co 1 Limited | | 2022 |
| Theseus Prop Co 2 Limited | | 2022 |
| Theseus Prop Co 4 Limited | | 2022 |
| Theseus Prop Co 5 Limited | | 2022 |
| Theseus Trustees (IOM) Limited | | 2023 |
| Thie NY Chibbyr a Limited | Professional & scientific | 1996 |