| ADH Building Services N/E Limited | Construction | 2011 |
| ADH Joinery Services NE Limited | Construction | 2017 |
| Aquos Limited | Construction | 2024 |
| Chris Curry Limited | Professional & scientific | 2025 |
| Clear Mind Collective CIC | Education | 2024 |
| Durham Psychology Ltd | Health & social care | 2023 |
| Durham Wellness Space Ltd | Real estate | 2024 |
| FGI Consultancy Ltd | Other services | 2018 |
| Good Selections Ltd | Wholesale & retail | 2008 |
| GQ Wholesale Ltd | Wholesale & retail | 2022 |
| Hippitots Limited | Education | 2002 |
| IAN Lavery Management Consultancy Limited | Professional & scientific | 2025 |
| Inner Explorers Ltd | Education | 2025 |
| J W Services NE Limited | Construction | 2018 |
| Junction 61 Transport Ltd | Transport & logistics | 2021 |
| JW Thompson Holdings Limited | Real estate | 2020 |
| K9 Animal Care Limited | Wholesale & retail | 2011 |
| Key Inns Limited | Hospitality | 2000 |
| KS and Sons Groundwork Ltd | Construction | 2022 |
| LA Choc Limited | Manufacturing | 2021 |
| Lenx Limited | Manufacturing | 2024 |
| Mackenzie Building Contractors Limited | Construction | 1980 |
| Marquix Ltd | Wholesale & retail | 2026 |
| MJR Ventures Limited | Wholesale & retail | 2017 |
| MSP Construction and Plant Hire Ltd | Construction | 2022 |
| Northern Cheese Company Ltd | Wholesale & retail | 2018 |
| Party Forever Limited | Wholesale & retail | 2012 |
| Pppt Limited | Health & social care | 2009 |
| Renla Limited | Hospitality | 2022 |
| S Cars (North East) Limited | Wholesale & retail | 2006 |
| SCF Training and Consultancy Limited | Other services | 2017 |
| Talbots Travel Limited | Transport & logistics | 2007 |
| Thunor Ltd | Transport & logistics | 2013 |
| Tranquil Home and Garden Limited | Wholesale & retail | 2018 |