| Think Bubble Limited | Professional & scientific | 1999 |
| Think Share Limited | Information & communication | 2017 |
| Thinnergrub Limited | Financial services | 2021 |
| Thistle Plumbing & GAS Services Ltd | Construction | 2017 |
| Thomas W. Stewart & Company, Limited | Real estate | 1954 |
| Thomson's Back O Hill Motor Factors Limited | Wholesale & retail | 1982 |
| Thomsons Property Company Limited | Wholesale & retail | 2007 |
| THR Number 11 Limited | Financial services | 2013 |
| THR Number 49 Limited | Financial services | 2024 |
| THR Number 50 Limited | Health & social care | 1995 |
| THR Number 51 Limited | Health & social care | 2011 |
| THR Number 52 Limited | Health & social care | 2014 |
| THR Number 53 Limited | Professional & scientific | 2010 |
| Tilden Solutions LP | | 2014 |
| Tile Centre Stirling Ltd | Wholesale & retail | 2017 |
| TIM & Co. Trading Limited | Wholesale & retail | 2025 |
| Timorous Beastie Cafe Ltd | Hospitality | 2025 |
| Tindell, Grant & Co Limited | Professional & scientific | 2000 |
| Tingrascott Ltd. | Professional & scientific | 2008 |
| Tinkerbells Emporium Ltd | Wholesale & retail | 2016 |
| Tino Trade LP | | 2016 |
| Tinsel & Tartan Ltd | Wholesale & retail | 2025 |
| Titanium Shelf 102 Limited | Real estate | 2012 |
| Tkkt Properties Limited | Real estate | 2024 |
| Tkrh Limited | Hospitality | 2024 |
| TLC Customs Ltd | Wholesale & retail | 2019 |
| TLC Detailing Ltd | Wholesale & retail | 2013 |
| TLD Services Limited | Administrative & support | 1999 |
| TNO Foods Limited | Hospitality | 2026 |
| Todd Square Limited | Real estate | 2018 |
| Toffolo Limited | Construction | 1991 |
| Toffolo Stirling Limited | Construction | 1995 |
| Tollhouse Development Ltd | Construction | 2020 |
| TOM Povey Audio Ltd | Information & communication | 2023 |
| Tony Mccorisken Roofing and Building Services Ltd | Construction | 2011 |
| Top Box Self Storage Ltd. | Other services | 2018 |
| Top Glass Windows and Doors Ltd | Construction | 2024 |
| Top Table Photography LLP | | 2015 |
| Topcom Holdings LP | | 2016 |
| Tophill Accents LP | | 2017 |
| Toprite Capital LP | | 2016 |
| Torbrex Inns Limited | Hospitality | 2011 |
| Tortolano Holdings Ltd | Real estate | 2025 |
| Tortolano Property Ltd. | Real estate | 2020 |
| Total Reinstatement Services (EOT) Ltd | Other services | 2026 |
| Total Reinstatement Services Limited | Construction | 1998 |
| Towercrane Services Limited | Construction | 2019 |
| Town & Country Corporation Limited | Real estate | 2000 |
| TP Food Ltd | Hospitality | 2025 |
| TPI Scotland Limited | Real estate | 2015 |
| Tque Therapies Limited | Health & social care | 2025 |
| Trackday Transport Ltd | Transport & logistics | 2025 |
| Tradiescope Ltd | Construction | 2026 |
| Tradstocks Construction Ltd. | Construction | 2007 |
| Tradstocks Group Ltd | Professional & scientific | 2017 |
| Tradstocks Ltd. | Manufacturing | 1999 |
| Tradstocks Stone Quarrying Ltd. | Mining & quarrying | 2007 |
| Train'D UP Railway Resourcing Limited | Education | 2003 |
| Tranquility Toolbox Ltd | Health & social care | 2023 |
| Transcom Goldmine Profit | | 2009 |
| TRAVEL2ROOTS Ltd | Administrative & support | 2025 |
| Trendoholic Limited | Wholesale & retail | 2023 |
| Triage Central Limited | Administrative & support | 1998 |
| Trigerap Shipping LP | | 2016 |
| Trimline (Edinburgh) Limited | Wholesale & retail | 2019 |
| Trinity Hospitality Limited | Hospitality | 2020 |
| Tronel Universal LP | | 2016 |
| Trontex LP | | 2015 |
| Trophies Frames & Screen Printing Ltd | Manufacturing | 2022 |
| Trophy Events Ltd | Administrative & support | 2020 |
| Trueline Lasers Ltd. | Professional & scientific | 2025 |
| Truskynn Ltd | Health & social care | 2023 |
| Trust Trade LP | | 2016 |
| Tryst Brewing Ltd. | Manufacturing | 2022 |
| Tulip Ventures Limited | Wholesale & retail | 2025 |
| Tully Trap Limited | Wholesale & retail | 2018 |
| Turkish Style Ltd | Other services | 2023 |
| TWP Painters & Decorators Ltd | Construction | 2025 |
| U Saavee Ltd | Wholesale & retail | 2020 |
| UA Livestock Limited | Administrative & support | 2006 |
| Ucss Limited | Education | 2010 |
| UHS (Scotland) Limited | Manufacturing | 2026 |
| UIN Foods Limited | Manufacturing | 2007 |
| UK Good Source Ltd | Wholesale & retail | 2021 |
| Ulster Energy Limited | Energy | 2019 |
| Ultimate Insulation Supplies Ltd. | Construction | 2012 |
| Ultimate Networks Scotland Ltd | Information & communication | 2024 |
| Ultimate Private Hire Ltd. | Other services | 2010 |
| Ultimate Shine Autos Limited | Other services | 2008 |
| Under the Saltire Skies Ltd | Hospitality | 2023 |
| Understanding Equines Ltd | Education | 2018 |
| Unicorn Plant Hire Ltd | Administrative & support | 2019 |
| Unitech Development | | 2009 |
| United Auctions Group Limited | Administrative & support | 2016 |
| United Auctions Limited | Administrative & support | 2006 |
| United Auctions Trustees Limited | Financial services | 2025 |
| Unity Consulting Scotland Ltd | Professional & scientific | 2021 |
| Universal Marketing Services LP | | 2017 |
| Universities and Colleges Shared Services Limited | Education | 2011 |
| Unorthodox Stirling Limited | Hospitality | 2019 |