| 36 Stanhope Grove Freehold Limited | Real estate | 2024 |
| Advanced Wind Training Academy Ltd | Administrative & support | 2022 |
| Applied Control Consultants Ltd | Professional & scientific | 2007 |
| Bamburgh Bidco Limited | Financial services | 2024 |
| Bamburgh Midco Limited | Financial services | 2024 |
| Bamburgh Topco Limited | Financial services | 2024 |
| Calta Health Limited | Health & social care | 2025 |
| Capability Cloud Limited | Information & communication | 2015 |
| Casasilen Consulting Ltd | Information & communication | 2024 |
| Castlegate Mill Management Limited | Real estate | 2026 |
| Charles Bellwood Holdings Limited | Financial services | 2020 |
| D.M.Donaldson Ltd | Real estate | 2018 |
| Endeavour 171 Limited | Health & social care | 2025 |
| Endeavour Secretary Limited | Professional & scientific | 1997 |
| FB Shipping Limited | Financial services | 2004 |
| FB Tankship III Limited | Transport & logistics | 2004 |
| FB Tankship IV Limited | Transport & logistics | 2004 |
| FC Shipping Limited | Financial services | 2004 |
| FC Tankship I Ltd | Transport & logistics | 2004 |
| FC Tankship II Ltd | Transport & logistics | 2004 |
| Friends of Newby CIC | Other services | 2024 |
| H E Woolley Limited | Other services | 2000 |
| Hugill of Teesside Limited(The) | | 1955 |
| K2B Hair Design Limited | Other services | 2005 |
| Luia Consultancy and Training Limited | Health & social care | 2025 |
| Matriarch Properties Limited | Real estate | 2017 |
| Matriarch Property Holdings Limited | Financial services | 2025 |
| MBJ Safety Training Limited | Professional & scientific | 2004 |
| NCX Holdings Ltd | Financial services | 2024 |
| Nodem Limited | Financial services | 2024 |
| Offshore Support Vessels IV Limited | Mining & quarrying | 1966 |
| Offshore Support Vessels V Limited | Mining & quarrying | 2001 |
| Pacs Marine Engineering Ltd. | Manufacturing | 2014 |
| Propulsion Limited | Professional & scientific | 2017 |
| RBCARE2023 Ltd | Financial services | 2023 |
| RBCARE2023BCO Ltd | Financial services | 2023 |
| Sabic Global Limited | Administrative & support | 1987 |
| Sabic UK Limited | Manufacturing | 2001 |
| Sharp Shot Global Limited | Wholesale & retail | 2025 |
| Sustainable Squid Fishing Limited | Agriculture & fishing | 2014 |
| T1.9 Limited | Administrative & support | 2003 |
| Tees Valley Business Club Ltd. | Other services | 1974 |
| THE Endeavour Partnership LLP | | 2002 |
| THE Mirza Talib Hussain Foundation | Other services | 2007 |
| Turnsea Limited | Professional & scientific | 2009 |
| Ulterra Drilling Europe Ltd | Professional & scientific | 2010 |
| Vroon Shipping U.K. Ltd. | Transport & logistics | 2004 |
| WOO Live Limited | Professional & scientific | 2024 |
| Work Matters Limited | Administrative & support | 2001 |