| Amazing Music Technology Limited | Wholesale & retail | 2018 |
| Amazing Trends Ltd | Wholesale & retail | 2016 |
| Amber Access Solutions Limited | Professional & scientific | 2012 |
| Amber James Properties Ltd | Administrative & support | 2019 |
| Amber Joinery BCD Limited | Administrative & support | 2025 |
| Ambite Ltd | Wholesale & retail | 2020 |
| AMC Recycling Limited | Administrative & support | 2026 |
| AMD Specialist Coatings (Holdings) Limited | Professional & scientific | 2008 |
| Amedeo Housing Ltd | Real estate | 2024 |
| Amelia Allbright Limited | Wholesale & retail | 2020 |
| Amen Properties (NE) Ltd | Real estate | 2024 |
| Amenrior Luxe & Cook 'N' Pastries Ltd | Hospitality | 2026 |
| Amerside Ltd | Health & social care | 2021 |
| AMG Car Sales Ltd | Wholesale & retail | 2013 |
| AMG Fabrications (NE) Limited | Manufacturing | 2021 |
| AMG Transport Limited | Transport & logistics | 2016 |
| AMH Medical Services Limited | Real estate | 2016 |
| Amin Rahat Ltd | Health & social care | 2024 |
| Amira Tandoori Ltd | Hospitality | 2026 |
| Amixon Ltd | Wholesale & retail | 2024 |
| Amjaf Estates Ltd | Real estate | 2006 |
| AMO Car Bodywork Ltd | Wholesale & retail | 2025 |
| Amore Coffee Limited | Wholesale & retail | 2015 |
| AMOVE4LESS Ltd | Transport & logistics | 2019 |
| AMP Properties (NE) Limited | Real estate | 2024 |
| Ampersand Inventions Community Interest Company | Arts & recreation | 2012 |
| Ample Wealth Limited | Financial services | 2026 |
| Amplify Nutritional Therapy Limited | Health & social care | 2020 |
| AMS Electrical Distributrs Limited | Wholesale & retail | 2024 |
| AMT Real Estate Limited | Real estate | 2015 |
| AMY House Limited | Real estate | 2026 |
| AMY Hunton’S Childcare Limited | Health & social care | 2016 |
| AMZ Electrical Installations Limited | Construction | 2020 |
| ANA Marine Limited | Manufacturing | 1999 |
| ANA Norvent Limited | Manufacturing | 2008 |
| ANA1OG Ltd | Wholesale & retail | 2021 |
| Analyt Data & Technology Solutions Limited | Information & communication | 2014 |
| Ananke Limited | Wholesale & retail | 2011 |
| Anceium Global Ltd | Wholesale & retail | 2021 |
| Andco Homes Limited | Construction | 2018 |
| Anderfanx Limited | Professional & scientific | 2018 |
| Anderson Holdings Ltd | Real estate | 2015 |
| Andlaw Holdings Limited | Professional & scientific | 2010 |
| Andrew Craig BD Ltd | Real estate | 2020 |
| Andrew Craig BI Ltd | Real estate | 2020 |
| Andrew Craig FW Ltd | Real estate | 2020 |
| Andrew Craig GF Ltd | Real estate | 2020 |
| Andrew Craig GH Ltd | Real estate | 2020 |
| Andrew Craig HB Ltd | Real estate | 2020 |
| Andrew Craig JR Ltd | Real estate | 2020 |
| Andrew Craig Lettings LLP | | 2022 |
| Andrew Craig LF Ltd | Real estate | 2020 |
| Andrew Craig Limited | Real estate | 1996 |
| Andrew Craig LNH LLP | | 2018 |
| Andrew Craig Property Management LLP | | 2008 |
| Andrew Craig SL Ltd | Real estate | 2020 |
| Andrew Craig SS Ltd | Real estate | 2020 |
| Andrew Craig Surveyors LLP | | 2022 |
| Andrew Pieri Limited | Health & social care | 2022 |
| Andy's Wash Ltd | Other services | 2026 |
| Andysmailesconsulting.Com Ltd | Information & communication | 2023 |
| Angel Building Services NE Ltd | Construction | 2018 |
| Angel Construction Limited | Construction | 2005 |
| Angel D Assets Ltd | Wholesale & retail | 2026 |
| Angel Exec Limited | Professional & scientific | 2017 |
| Angel Fish Bar NE Ltd | Hospitality | 2025 |
| Angel Management Limited | Real estate | 2010 |
| Angel Pizza (Wrekenton) Ltd | Wholesale & retail | 2017 |
| Angel Traders NE Ltd | Wholesale & retail | 2023 |
| Angel X Productions Ltd | Manufacturing | 2026 |
| Anglo Gateshead Ltd | Hospitality | 2025 |
| Angus-Air Limited | Professional & scientific | 1989 |
| Animal Antics (NE) Limited | Arts & recreation | 2010 |
| Animal Rescue Funding Ltd | Financial services | 2019 |
| Animate 2 Educate Limited | Education | 2012 |
| Animov Limited | Information & communication | 2010 |
| Anlet Limited | Information & communication | 2022 |
| ANN Street Garage Limited | Manufacturing | 2004 |
| Anna Thompson Home Limited | Wholesale & retail | 2018 |
| Annas Mini Market (Gateshead) Ltd | Wholesale & retail | 2020 |
| Anox Care Services Ltd | Administrative & support | 2025 |
| Anozie Estate Management Limited | Real estate | 2022 |
| Anozie Medical Services Limited | Health & social care | 2022 |
| ANT Medical Ltd | Health & social care | 2013 |
| Anvil Electrical Training Ltd | Education | 2009 |
| Anvil Locksmiths Training Limited | Administrative & support | 2018 |
| Anwar Jafri Ltd | Health & social care | 2012 |
| Anycarbuyer Limited | Wholesale & retail | 2020 |
| AP Risk Management Ltd | Financial services | 2005 |
| AP92 Holdings Ltd | Financial services | 2025 |
| Apacs Sports Limited | Wholesale & retail | 2016 |
| APDEV365 Limited | Information & communication | 2019 |
| Apex Acoustics Limited | Professional & scientific | 2005 |
| Apex Car and Commercial Ltd | Wholesale & retail | 2024 |
| Apex Developments Group Ltd | Construction | 2024 |
| Apex Energy Group Limited | Construction | 2024 |
| Apex Motors N.E Limited | Wholesale & retail | 2025 |
| Apex Properties NE Ltd | Extraterritorial | 2016 |
| Apex Radio Limited | Information & communication | 1998 |
| Apex Radio Properties Ltd | Real estate | 2022 |