| S G Accountancy (UK) Limited | Professional & scientific | 2014 |
| Sanz Retail Limited | Real estate | 2021 |
| Soul Stori Ltd | Professional & scientific | 2026 |
| Steve Edwards Building Contractors Ltd | Construction | 2015 |
| Tack Shop Ltd | Wholesale & retail | 2024 |
| THE Loxley Furniture Company Limited | Manufacturing | 2006 |
| THE Pembrokeshire Laundry Company Ltd | Administrative & support | 2023 |
| THE Therapy Store Sussex Ltd | Wholesale & retail | 2012 |
| Thomas Joinery Limited | Manufacturing | 2005 |
| Thomas-Mac Investments Ltd | Financial services | 2024 |
| Thomas-Mac Properties Ltd | Real estate | 2025 |
| Toby and BEN Ltd | Manufacturing | 2021 |
| Trees for Tomorrow Ltd | Agriculture & fishing | 2021 |
| Trewern Farm Contractors Limited | Agriculture & fishing | 2006 |
| Trewern Farm Holdings Limited | Financial services | 2021 |
| Trewern Farm Limited | Agriculture & fishing | 2002 |
| Trimtech Site Services Ltd | Professional & scientific | 2023 |
| Trydanwyr Preseli Electrical Ltd | Construction | 2022 |
| U Melt ME Ltd | Wholesale & retail | 2022 |
| Vital Gold Ltd | Manufacturing | 2021 |
| Viva Bionics Ltd | Manufacturing | 2024 |
| W.H. James and SON Limited | Wholesale & retail | 1956 |
| Wallaston Farm Limited | Agriculture & fishing | 2018 |
| WCC Estates Limited | Real estate | 2025 |
| West Coast Collab Limited | Hospitality | 2020 |
| West Farms Limited | Agriculture & fishing | 2004 |
| Willow Property MGT Ltd | Households | 2021 |
| WP Overclockers Limited | Information & communication | 2020 |