| Steve Davidson Advertising Limited | Professional & scientific | 2008 |
| Stewart Partnership (People & Process) Ltd | Professional & scientific | 2009 |
| Summers PR Ltd | Professional & scientific | 2024 |
| Summit Route Ltd | Transport & logistics | 2025 |
| Swavex Ltd | Construction | 2026 |
| SWB Global Engineering Ltd | Other services | 2016 |
| Tahk Limited | Other services | 2025 |
| Tantastic NE Ltd | Other services | 2026 |
| Telford Safety Consultants Limited | Professional & scientific | 2016 |
| Tent Limited | Administrative & support | 2007 |
| THE Baby Hub Limited | Education | 2016 |
| THE Daily Nail Effect Ltd | Education | 2025 |
| THE Frock Exchange Limited | Wholesale & retail | 2022 |
| THE Imperial Paper Company Ltd | Wholesale & retail | 2026 |
| THE Natural Lifestyle Coach Ltd | Health & social care | 2024 |
| THE Scranfather Ltd | Hospitality | 2025 |
| THE Texas Smoker Limited | Hospitality | 2014 |
| Thompson Safety Ltd | Health & social care | 2026 |
| Three Bears Emporium Ltd | Wholesale & retail | 2019 |
| Tiffin Foods Ltd | Hospitality | 2025 |
| Toon Army Limited | Manufacturing | 1995 |
| Total QS Solutions Limited | Professional & scientific | 2014 |
| Transbax Ltd | Transport & logistics | 2024 |
| TWENTYTWO22 Ltd | Real estate | 2025 |
| Two Little Birdies Play Café Ltd. | Hospitality | 2026 |
| Unscripted Photography Ltd | Professional & scientific | 2024 |
| Unscripted Portraits Ltd | Professional & scientific | 2024 |
| Voltbox Ltd | Other services | 2025 |
| Warne Enterprises Ltd | Financial services | 2023 |
| West Ryton Buffs Ltd | Hospitality | 2025 |
| WEY AYE Windows and Exterior Cleaning Ltd | Administrative & support | 2026 |
| Wholetree Ltd | Agriculture & fishing | 2022 |
| Willows Montessori Nursery Limited | Education | 2010 |
| Willows Offshore Wind Limited | Construction | 2021 |
| X12 Consulting Ltd | Information & communication | 2003 |
| Xena Health & Aesthetics Ltd | Health & social care | 2024 |