| 007 Racing Ltd | Transport & logistics | 2018 |
| 1-13 (Odds) Greenlands Road RTM Company Limited | Real estate | 2025 |
| 1-27 (Odds) TIR Founder Fields RTM Company Limited | Real estate | 2021 |
| 1-8 Cherrydene House & 15 Greenlands Road RTM Company Limited | Real estate | 2025 |
| 10 - 21 ST Lucia Walk RTM Company Limited | Real estate | 2024 |
| 11 & 15 Mann Island Liverpool RTM Company Limited | Real estate | 2025 |
| 15 High Street B14 7DW RTM Company Limited | Real estate | 2024 |
| 15-25 (Odds) Baxter Mews RTM Company Limited | Real estate | 2023 |
| 178 Honeysuckle Road RTM Company Limited | Real estate | 2026 |
| 18 John Street RTM Company Limited | Real estate | 2021 |
| 19 Glenmore Road RTM Company Limited | Real estate | 2024 |
| 19 Grosvenor Place Limited | Real estate | 1983 |
| 1916 Holdings Limited | Financial services | 2024 |
| 1A Auto Style Limited | Wholesale & retail | 2015 |
| 2-12 (Evens) TIR Founder Fields RTM Company Limited | Real estate | 2023 |
| 21 Corrance Road RTM Company Limited | Real estate | 2021 |
| 22-32 Pendle Court RTM Company Limited | Real estate | 2025 |
| 24/7 Supply Limited | Wholesale & retail | 2012 |
| 28 Alfred Knight Way RTM Company Limited | Real estate | 2024 |
| 2829 Ltd | Education | 2017 |
| 2S Consulting Limited | Extraterritorial | 2014 |
| 3 Peaks Home Care Services Limited | Health & social care | 2025 |
| 32-33 Nile Street RTM Company Limited | Real estate | 2021 |
| 32-36 Evens Buckingham Baxter Mews RTM Company Limited | Real estate | 2024 |
| 350.ORG | | 2017 |
| 4 - 9 Hartburn Close RTM Company Limited | Real estate | 2024 |
| 4B Fabrications Limited | Extraterritorial | 2018 |
| 54 Degrees Ltd | Information & communication | 2022 |
| 6-48 (Evens) Castle Street RTM Company Limited | Real estate | 2022 |
| 7 Senses Wellbeing Ltd | Public administration | 2026 |
| 9GC Limited | Administrative & support | 2012 |
| A & G Family Wealth Ltd | Financial services | 2024 |
| A & J Hair Design Ltd | Other services | 2012 |
| A & M Estates Ltd | Real estate | 2019 |
| A & S Plasterers and Building Contractors Limited | Construction | 2019 |
| A Armstrong Roofing Limited | Construction | 2016 |
| A Bath Consulting Limited | Health & social care | 2023 |
| A Bath Properties Limited | Real estate | 2023 |
| A World of Fires Limited | Wholesale & retail | 2005 |
| A&C Property Care Ltd | Construction | 2026 |
| A&H (NE) Investments Ltd | Real estate | 2024 |
| A.A.L.A Properties Ltd | Real estate | 2025 |
| A.S.C Fire Protection Ltd | Construction | 2024 |
| AA Construction (Holdings) Limited | Real estate | 2016 |
| AAD Properties Limited | Construction | 2006 |
| AAP Holdings Limited | Professional & scientific | 1996 |
| AB Healthcare NE Limited | Health & social care | 2019 |
| Ab&C Solutions Ltd | Manufacturing | 2007 |
| Abacus Design and Fabrication Limited | Manufacturing | 2002 |
| Abacus Jack Limited | Professional & scientific | 2016 |
| Abbey View (North East) Ltd | Construction | 2022 |
| Abdullah 14 Ltd | Hospitality | 2019 |
| Abfad Limited | Administrative & support | 1996 |
| Abstan Ltd | Hospitality | 2018 |
| Acas Bathrooms Sunderland Ltd | Wholesale & retail | 2023 |
| Accountability Durham Ltd | Professional & scientific | 2025 |
| Accountability Financial Solutions Ltd | Financial services | 2012 |
| Accounts North East Ltd | Information & communication | 2020 |
| Ace Rentals North East Limited | Administrative & support | 2024 |
| Acorn Batchworks Ltd | Extraterritorial | 2010 |
| Acorn Laser EOT Limited | Extraterritorial | 2025 |
| Acorn Laser Limited | Manufacturing | 1998 |
| Acorn Metalwork Ltd | Extraterritorial | 2019 |
| ACS Group Inc Limited | Professional & scientific | 2011 |
| ACS Projects Limited | Professional & scientific | 2003 |
| Active Ascend Ltd | Wholesale & retail | 2024 |
| Active Windows & Doors Ltd | Manufacturing | 2010 |
| Actual Corners Limited | Information & communication | 2024 |
| Adamsproducts Ltd | Wholesale & retail | 2023 |
| Adapt the Studio Limited | Arts & recreation | 2018 |
| Adapt With Ashley Limited | Other services | 2025 |
| ADC Electrical Limited | Manufacturing | 2010 |
| Advanced Electric Machines Limited | Professional & scientific | 2016 |
| Advanced Electric Machines Research Limited | Professional & scientific | 2016 |
| Advanced Fire Risk Limited | Public administration | 2026 |
| Advanced Group Services Ltd | Manufacturing | 1982 |
| Advanced Heat Transfer Limited | Extraterritorial | 2020 |
| Advanced Lighting Technology (U.K.) Limited | Manufacturing | 2011 |
| Advanced Lighting Technology Limited | Construction | 2020 |
| Advanced Renewable Power Ltd | Energy | 2011 |
| Adventure Into Art CIC | Education | 2021 |
| AEI Cables Limited | Manufacturing | 2011 |
| Aejeh Professional Services Limited | Wholesale & retail | 2021 |
| Aesthetic North East Limited | Health & social care | 2017 |
| Affy World Limited | Wholesale & retail | 2022 |
| Ageha Limited | Hospitality | 2026 |
| AH Panel Solutions Ltd | Manufacturing | 2025 |
| AHE Properties North East Limited | Real estate | 2023 |
| Aiken Flooring Contracts Limited | Construction | 2001 |
| Air Supply (North East) Limited | Manufacturing | 2013 |
| Airtime Services Limited | Information & communication | 1988 |
| Aitch MAC Ltd | Wholesale & retail | 2022 |
| AJ Properties NE Limited | Real estate | 2022 |
| AJD Law (Sunniside) Limited | Financial services | 2024 |
| AJD Law Limited | Professional & scientific | 2020 |
| AJE Holdings and Investments Ltd | Financial services | 2024 |
| Albany Metal Spinners Ltd | Manufacturing | 2014 |
| Alderson Family Investco Limited | Financial services | 2023 |
| Alderson Properties Limited | Real estate | 2013 |
| Alex 1996 Barbering Ltd | Other services | 2026 |