| A.E. and C.A. Wall Ltd. | Financial services | 2012 |
| AC Fitness Promotions Limited | Arts & recreation | 2018 |
| Acorn Care & Nursing Limited | Health & social care | 2006 |
| Actheron (Dielife) Limited | Manufacturing | 1984 |
| Adair Automotive Ltd | Wholesale & retail | 2025 |
| Aero Networks Limited | Information & communication | 2006 |
| Alnmaritec Limited | Manufacturing | 2006 |
| Aloe Flats Limited | Real estate | 1998 |
| Altoria (Stannington) Limited | Construction | 2022 |
| Altoria (Thirston) Limited | Construction | 2022 |
| Anbro Solutions Limited | Professional & scientific | 2010 |
| Angel Personnel Solutions Limited | Administrative & support | 2016 |
| Ashdown Construction Limited | Construction | 2024 |
| Ashdown Services East Ltd | Health & social care | 2020 |
| ASP Ship Management Limited | Transport & logistics | 1999 |
| Astro Print Limited | Manufacturing | 1983 |
| Athb Properties Ltd | Real estate | 2021 |
| Aztec Funding Ltd | Financial services | 2020 |
| Banfi Barbers Limited | Other services | 2025 |
| Base Professional Aesthetics Limited | Other services | 2023 |
| BE More Geek Ltd | Administrative & support | 2018 |
| Beaty Motorsport Ltd | Wholesale & retail | 2023 |
| Bede Gaming Limited | Information & communication | 2012 |
| Black Hills Products Limited | Manufacturing | 2017 |
| Bowes Management Services Ltd | Administrative & support | 2023 |
| Boyd Ductwork Limited | Manufacturing | 2018 |
| Braeside Small Holding Ltd | Agriculture & fishing | 2026 |
| Brand Creations Group Limited | Wholesale & retail | 2020 |
| Brand Creations International Limited | Wholesale & retail | 2021 |
| Brand Creations Limited | Wholesale & retail | 2021 |
| Brand Creations Marketing Limited | Wholesale & retail | 2024 |
| Brandling Mews Limited | Households | 1983 |
| Bright Path Support (NE) Ltd | Health & social care | 2026 |
| Britton Design Consultants Limited | Professional & scientific | 2008 |
| Brompton Advisory Ltd | Information & communication | 2018 |
| Burns Investment Group Limited | Real estate | 2024 |
| Business Works International Ltd | Information & communication | 2018 |
| C.Donnelly Construction Limited | Construction | 2004 |
| Calmont Homes (Oak Meadows) Limited | Construction | 2019 |
| CARCREDIT365 Limited | Administrative & support | 2016 |
| Carmeleon Concepts Ltd | Manufacturing | 2012 |
| Castle Art Supplies Limited | Wholesale & retail | 2011 |
| Chak 336 Enterprises Limited | Other services | 2019 |
| Civismed Ltd | Health & social care | 2019 |
| CJP | | 1987 |
| Complete Car Credit Limited | Financial services | 2019 |
| Computerfirst Limited | Information & communication | 2007 |
| Coulter Technical Services Ltd | Administrative & support | 2012 |
| County Durham Profiles Ltd | Manufacturing | 2022 |
| Cramlington Tyres & Repairs Limited | Wholesale & retail | 2015 |
| Creative Origins Ltd | Arts & recreation | 2024 |
| Curious Taverns Limited | Hospitality | 2019 |
| CYB Intermediaries Limited | Financial services | 2000 |
| CYB Investments Limited | Financial services | 1987 |
| CYB SSP Trustee Limited | Professional & scientific | 1994 |
| D R Landscapes Limited | Extraterritorial | 2020 |
| D S F P Properties Ltd | Real estate | 2025 |
| Datum Limited | Manufacturing | 2005 |
| David Jenkins (Meats) of Scunthorpe Limited | Financial services | 1981 |
| Dawl Investments Limited | Professional & scientific | 2024 |
| Deanos NE Ltd | Hospitality | 2022 |
| Deco-Dc Ltd | Wholesale & retail | 2024 |
| Deepdale Solutions Ltd | Manufacturing | 1994 |
| Divecor Limited | Education | 2017 |
| Document Solutions (East) Limited | Administrative & support | 2017 |
| Document Solutions (UK) Limited | Administrative & support | 2011 |
| Dodds Farm Management Company Limited | Extraterritorial | 2001 |
| Dolphin Coast Limited | Financial services | 2001 |
| DWC Yorkshire Limited | Hospitality | 2024 |
| E.A.P. Proprieta Limited | Real estate | 2024 |
| Eagle Place Covered Bonds LLP | | 2016 |
| Eduprise Ltd | Professional & scientific | 2018 |
| ELEV8R Ltd | Wholesale & retail | 2021 |
| Ellie Cooper Ltd | Information & communication | 2009 |
| Ellis Commissioning Services Limited | Administrative & support | 2012 |
| Empowered Living Support Ltd | Health & social care | 2026 |
| Endless Kitchen Ltd | Hospitality | 2021 |
| Ethos Professional Services Limited | Administrative & support | 2014 |
| Eudaimonic Recovery Ltd | Health & social care | 2024 |
| Everycone Limited | Construction | 1993 |
| Falcon Topco Limited | Financial services | 2019 |
| Fieldwork Contracts Limited | Wholesale & retail | 1986 |
| Focal Point Schools Ltd | Information & communication | 2012 |
| Forevercare Recruitment Limited | Administrative & support | 2018 |
| Fuel Infrastructure Services Limited | Construction | 2024 |
| Furnish 4 Less Trade Ltd | Wholesale & retail | 2009 |
| Future Energy(Supply) Ltd | Wholesale & retail | 2014 |
| G P M Network Limited | Professional & scientific | 2002 |
| Geoff Maclauchlan Limited | Professional & scientific | 2003 |
| Geoffrey Lurie Solicitors Limited | Professional & scientific | 2008 |
| Gilwood Engineering Services Limited | Wholesale & retail | 1985 |
| Gosforth Bathrooms & Tiles Ltd | Wholesale & retail | 2024 |
| Gosforth Beauty Ltd | Other services | 2003 |
| Gounari Ltd | Professional & scientific | 2018 |
| Governor Technical Solutions Limited | Wholesale & retail | 2011 |
| Grdy Restaurant Group Ltd | Hospitality | 2021 |
| Grorud Trustees Limited | Professional & scientific | 2003 |
| Growing Online Ltd | Information & communication | 2023 |
| H.Mullins(Earby)Limited | Manufacturing | 1941 |
| Hall Green Management Company Limited | Real estate | 2014 |