| Team Ascari Limited | Arts & recreation | 2000 |
| THE 360 Centre CIC | Education | 2021 |
| THE Edinburgh Stair Maintenance Company Ltd | Construction | 2016 |
| THE SET Squad Limited | Construction | 2025 |
| THE Seton Garden Venue Limited | Hospitality | 2025 |
| THE Software Systems Studio Limited | Information & communication | 1993 |
| THE Steading Hair & Beauty Ltd | Other services | 2024 |
| Thoughtprocess Limited | Information & communication | 2007 |
| TRI Edinburgh Construction Ltd | Construction | 2025 |
| TRI Scotland Ltd | Real estate | 2014 |
| Turnkey Biotech Limited | Construction | 2025 |
| Tycho Systems Ltd | Manufacturing | 2021 |
| TÍ Design Ltd | Professional & scientific | 2019 |
| Unopercento Ltd | Information & communication | 2025 |
| VA Electronic Design Limited | Professional & scientific | 1987 |
| Volt Vitesse Engineering Limited | Professional & scientific | 2022 |
| W&W Van Hofberg Limited | Financial services | 2008 |
| Wallace Consulting Services Ltd | Professional & scientific | 2016 |
| Wavelength Workplace Limited | Professional & scientific | 2023 |
| Webporty Limited | Information & communication | 2021 |
| White Group Limited | Construction | 2025 |
| Yummikeys Limited | Manufacturing | 2016 |
| Zander Communications Limited | Professional & scientific | 2016 |
| Zaptel Rise Limited | Administrative & support | 2019 |
| Zebec Watches Ltd | Manufacturing | 2020 |