| 03409727 Limited | Administrative & support | 1997 |
| 1-16 Ingham House RTM Company Limited | Households | 2009 |
| 1-2-1 Mortgages Ltd | Financial services | 2021 |
| 10TH House Limited | Information & communication | 2024 |
| 133, 135, 137 & 139 Highfield Road Freehold Limited | Households | 2025 |
| 15 Claremont Property Management Co. Ltd | Hospitality | 2011 |
| 16006883 Ltd | Hospitality | 2024 |
| 1892 Electrical Services Limited | Manufacturing | 2009 |
| 1ST Generation Fitness Ltd | Arts & recreation | 2024 |
| 2ND 2 None Solutions Ltd | Construction | 2025 |
| 2SCISSORBOYS Ltd | Other services | 2016 |
| 34 Homes Ltd | Real estate | 2025 |
| 3467 Collective Ltd | Information & communication | 2025 |
| 3D Property Management Ltd | Real estate | 2017 |
| 3SIXTY 3PL Ltd | Transport & logistics | 2021 |
| 42PARKAVENUE Limited | Other services | 2016 |
| 4A Haven Property UK Ltd | Real estate | 2024 |
| 5BARBER Ltd | Other services | 2025 |
| 7 Elms Management Co Ltd | Real estate | 2011 |
| 808'S the Winning (2) Ltd | Construction | 2022 |
| 999TAJGROUP Ltd | Wholesale & retail | 2025 |
| A & a Global Services Ltd | Wholesale & retail | 2025 |
| A & J Investments NE Ltd | Real estate | 2021 |
| A & J Leisure NE Ltd | Hospitality | 2023 |
| A & J Partnership LLP | | 2026 |
| A & S 11 Limited | Other services | 2019 |
| A & S Cycles Limited | Wholesale & retail | 2006 |
| A & S Greaves Properties Limited | Real estate | 2024 |
| A Erickson Property Limited | Real estate | 2022 |
| A Jones Aircraft Maintenance Services Ltd | Manufacturing | 2022 |
| A M & B Wilson Ltd | Construction | 2006 |
| A M Access Solutions Limited | Construction | 2014 |
| A Nelson Brickwork Ltd | Construction | 2022 |
| A P O Properties Ltd | Real estate | 2022 |
| A S Health & Safety Services Limited | Extraterritorial | 2014 |
| A&F Trades Limited | Wholesale & retail | 2024 |
| A&G Wallis Limited | Construction | 2019 |
| A&M Pharmacy Ltd | Financial services | 2019 |
| A-Tec Electrical Limited | Construction | 2019 |
| A-Z Bargains Limited | Wholesale & retail | 2026 |
| A. C. Golf Supplies Limited | Wholesale & retail | 2009 |
| A.C.T Heating Ltd | Construction | 2025 |
| A.J.O Holdings (N.E) Ltd | Real estate | 2026 |
| A.M.N.E Security Ltd | Financial services | 2025 |
| A4M Films Limited | Information & communication | 2011 |
| AA & Textiles Ltd | Water & waste | 2026 |
| AA Newcastle Ltd | Households | 2018 |
| AA South Shields Ltd | Households | 2018 |
| AA Sunderland Ltd | Households | 2018 |
| Aatransportexpress Ltd | Transport & logistics | 2025 |
| Aayhan Ltd | Other services | 2023 |
| Abbeys Eastenders Limited | Hospitality | 2017 |
| Abbeys NCL Limited | Hospitality | 2023 |
| Abigail Valley Ltd | Households | 2024 |
| Abisolutely Salesforce Ltd | Information & communication | 2024 |
| Above the Action Limited | Information & communication | 2017 |
| ABU Tahir Logistics Ltd | Transport & logistics | 2025 |
| AC Essentials Ltd | Wholesale & retail | 2021 |
| Access Bellropes Ltd | Construction | 2025 |
| Ace Academy of Dance Ltd | Arts & recreation | 2025 |
| Ace MMA Ltd | Arts & recreation | 2023 |
| Acer Property Maintenance & Lets Limited | Hospitality | 2012 |
| Aciiidus Creative and Entertainment Ltd | Professional & scientific | 2025 |
| Acing Building Contractors Ltd | Construction | 2025 |
| Acklam Hall Management Ltd | Professional & scientific | 2014 |
| Acrylic Crafts Ltd | Manufacturing | 2009 |
| Action Station South Tyneside Limited | Health & social care | 1998 |
| Activefituk Ltd | Wholesale & retail | 2025 |
| Adam J Bell Properties Ltd | Real estate | 2024 |
| ADE North East Limited | Energy | 2020 |
| Adluriz Ltd | Transport & logistics | 2025 |
| ADM Training & Consultancy Ltd | Education | 2017 |
| Advanced Preservation Services Ltd | Construction | 2019 |
| Advanced Scaffolding Services Limited | Construction | 2025 |
| Adventure 1 Ltd | Professional & scientific | 2009 |
| AEC Drones Limited | Professional & scientific | 2020 |
| AEC Transport (NE) Ltd | Transport & logistics | 2025 |
| Aether Risk Ltd | Professional & scientific | 2025 |
| Afroluxe Hub Ltd | Other services | 2024 |
| Agavend Limited | Wholesale & retail | 2024 |
| AGE Concern Tyneside South | Health & social care | 2016 |
| AGE Concern Tyneside South Trading Limited | Health & social care | 1995 |
| Agincourt (11-19) Hebburn Limited | Real estate | 1996 |
| AHS Consumables Ltd | Wholesale & retail | 2023 |
| Aigenxi Ltd | Information & communication | 2026 |
| AIM Khan Consulting Limited | Information & communication | 2025 |
| AIM NE Ltd | Construction | 2024 |
| Aimee Malika Hall Ltd | Extraterritorial | 2021 |
| Airy Plait Limited | Information & communication | 2024 |
| AJ Bradley Logistics Ltd | Transport & logistics | 2025 |
| AJ Executive Detailing Ltd | Administrative & support | 2025 |
| Aj's Retail Limited | Wholesale & retail | 2025 |
| Ajay Kotagiri Medical Services Limited | Health & social care | 2016 |
| Ajaz Store Ltd | Wholesale & retail | 2024 |
| AJM Homes Limited | Real estate | 2007 |
| AK Coatings Preparation Ltd | Construction | 2018 |
| AK Rentals & Developments Ltd | Real estate | 2023 |
| AK Technical & Training Services Ltd | Education | 2020 |
| Ak's Diner Ltd | Hospitality | 2025 |
| Ak's Triple Diner Ltd | Hospitality | 2014 |