| Travelling Wardrobe Ltd | Wholesale & retail | 2026 |
| Trinity Real Assets Ltd | Real estate | 2025 |
| True Laser Cleaning Limited | Administrative & support | 2025 |
| TTC Compliance & Training Ltd | Administrative & support | 2017 |
| Turnbull Kyle Ltd | Professional & scientific | 2003 |
| Tweed Property Group Limited | Hospitality | 2025 |
| U-Stor Business Units Ltd | Real estate | 2013 |
| Ultimate Warehouse Deals Ltd | Wholesale & retail | 2020 |
| Vapeasy Ltd | Wholesale & retail | 2023 |
| Vetcel Limited | Professional & scientific | 2015 |
| Vilor Consulting Ltd | Professional & scientific | 2025 |
| Vision Dental Laboratory Limited | Health & social care | 2016 |
| W P Purves Electrical Limited | Construction | 2016 |
| W.B. Cavers & Co. | Professional & scientific | 1982 |
| Waggon Inn Bar & Grill Ltd | Hospitality | 2025 |
| Wagyu UK Limited | Extraterritorial | 2007 |
| Walker Groundworks Limited | Construction | 2001 |
| Walterstead Limited | Professional & scientific | 2009 |
| Warriors Group UK Ltd | Financial services | 2022 |
| Warriors Lifestyle Ltd | Arts & recreation | 2019 |
| Wellknowe Ltd | Health & social care | 2023 |
| Wessex North Limited | Real estate | 1998 |
| Whitehillfoot Ltd | Agriculture & fishing | 2024 |
| William Roxburgh (Lauder Brothers) Limited | Real estate | 1900 |
| Wonky Woolies Ltd | Manufacturing | 2014 |
| Wulfdin Ltd | Information & communication | 2024 |
| Yetholm Properties (1994) Limited | Households | 2010 |
| Zantra Holdings Limited | Financial services | 2023 |
| Zantra Limited | Agriculture & fishing | 2003 |