| A a Car Valeting Ltd | Wholesale & retail | 2026 |
| A and T Investment Group Ltd | Construction | 2019 |
| A B Cairns & SON Limited | Construction | 2021 |
| A C J Properties Ltd | Real estate | 2019 |
| A C Morse Limited | Transport & logistics | 2002 |
| A C Silver Unlimited | Wholesale & retail | 2015 |
| A Chandra Limited | Health & social care | 2017 |
| A Cold Sweat Ltd. | Wholesale & retail | 2018 |
| A D Fixings Ltd | Wholesale & retail | 2018 |
| A Ghumman Ltd | Transport & logistics | 2020 |
| A Great Little Book Exchange Ltd | | 2010 |
| A Hussain Estates Ltd | Real estate | 2025 |
| A I IT Solutions Ltd | Other services | 2026 |
| A J Martin Associates Limited | Administrative & support | 2012 |
| A J Stafford Ltd | Health & social care | 2022 |
| A J Sullivan Healthcare Limited | Health & social care | 2015 |
| A K S 88 Ltd | Hospitality | 2019 |
| A Kelly Consultancy Limited | Professional & scientific | 2013 |
| A L Ventures (NE) Ltd | Hospitality | 2022 |
| A Living Tradition CIC | Other services | 2011 |
| A Lizt Ltd | Manufacturing | 2025 |
| A M Car Sales (North East) Limited | Wholesale & retail | 2016 |
| A M (North-East) Ltd | Professional & scientific | 2021 |
| A Morgan Consultancy Services Limited | Professional & scientific | 2026 |
| A Parker Properties Ltd | Real estate | 2022 |
| A Perfect Polish Limited | Administrative & support | 2022 |
| A Plus Tiny Angels Limited | Wholesale & retail | 2022 |
| A R M Electrical Services Limited | Construction | 2006 |
| A Rowley Consultancy Limited | Information & communication | 2025 |
| A S & T Properties Limited | Administrative & support | 2018 |
| A Saleem Properties Ltd | Real estate | 2026 |
| A Shan Fast Food Ltd | Hospitality | 2025 |
| A Space With-In Ltd | Professional & scientific | 2013 |
| A Splash of Class NE Ltd | Construction | 2025 |
| A Sproat Electrical Limited | Construction | 2020 |
| A Star Dog Training Ltd | Professional & scientific | 2023 |
| A Star Future Limited | Education | 2006 |
| A Star Health Ltd | Health & social care | 2025 |
| A Star Travel (NE) Ltd | Transport & logistics | 2025 |
| A Taste of the States Ltd. | Wholesale & retail | 2015 |
| A TJ Brickwork Limited | Construction | 2026 |
| A to B Express (NE) Ltd | Transport & logistics | 2013 |
| A to B With KC Ltd | Transport & logistics | 2026 |
| A to Exceptional Ltd | Information & communication | 2026 |
| A to Z Solutions for Trading UK Ltd | Manufacturing | 2022 |
| A Vickers Ltd | Financial services | 2020 |
| A Watson Associates Limited | Professional & scientific | 2010 |
| A Willi UK Ltd | Administrative & support | 2023 |
| A&A Innovations Limited | Wholesale & retail | 2024 |
| A&A Lackenby Limited | Real estate | 2018 |
| A&B Clearance Ltd | Other services | 2025 |
| A&C Creation Ltd | Construction | 2026 |
| A&E Property Maintenance Limited | Other services | 2024 |
| A&G Electricals Ltd | Other services | 2024 |
| A&G Newco Limited | Administrative & support | 2026 |
| A&H Residential Group Ltd | Real estate | 2025 |
| A&J Rentals Limited | Real estate | 2025 |
| A&K Bistro Ltd | Hospitality | 2025 |
| A&L Roofing Specialists Ltd | Construction | 2025 |
| A&M Ents Ltd | Arts & recreation | 2018 |
| A&M Mehmood Property Ltd | Real estate | 2020 |
| A&M Plumbing and Heating Specialists Limited | Construction | 2017 |
| A&M Retail N.E Ltd | Wholesale & retail | 2026 |
| A&R Axis Ltd | Health & social care | 2025 |
| A&R Group Investments Ltd | Health & social care | 2024 |
| A&R Malik Ltd | Wholesale & retail | 2015 |
| A&R Teeth Focus Ltd | Health & social care | 2024 |
| A&R Utilities (North East) Limited | Construction | 2012 |
| A&S Lighting Limited | Wholesale & retail | 2015 |
| A&S North Investments Limited | Real estate | 2026 |
| A&S Property Investments (NE) Ltd | Real estate | 2024 |
| A-Greed Mediation Limited | Administrative & support | 2020 |
| A-Z Apartments Ltd | Hospitality | 2024 |
| A-Z Superstore Ltd | Wholesale & retail | 2023 |
| A. & P. Joiners & Builders Ltd. | Construction | 2003 |
| A. D. Property Maintenance Limited | Construction | 2007 |
| A. Douglas Construction (North East) Ltd | Construction | 2018 |
| A. Hall Consultancy Limited | Professional & scientific | 2025 |
| A. Mccoull & Co. Limited | Professional & scientific | 1972 |
| A. Ostell & Co. Limited | Manufacturing | 1998 |
| A. Rutherford Consulting Ltd | Professional & scientific | 2024 |
| A. Tilley Roofing Holdings Limited | Financial services | 2024 |
| A.& K. Gorham Limited | Real estate | 2014 |
| A.A Euro Textile Ltd | Wholesale & retail | 2021 |
| A.A Investment Enterprises Ltd | Real estate | 2020 |
| A.A.S. Limited | Professional & scientific | 1992 |
| A.A.T. (UK) Limited | Hospitality | 1996 |
| A.Armstrong Wind Services Ltd | Construction | 2023 |
| A.Bhaker Limited | Wholesale & retail | 2023 |
| A.Brogden Ltd | Professional & scientific | 2023 |
| A.E. Robb & Associates Limited | Professional & scientific | 1977 |
| A.Folashade Ltd | Health & social care | 2025 |
| A.H.U.S. Trenchless Solutions Limited | Construction | 2010 |
| A.J.G. Decorators Ltd | Construction | 2015 |
| A.J.Manners Property Company Limited | Real estate | 2020 |
| A.L.E. Marine Limited | Information & communication | 1987 |
| A.L.M Joinery Projects Ltd | Manufacturing | 2024 |
| A.M English Ltd | Education | 2024 |
| A.Sadjid Project Services Limited | Information & communication | 2016 |
| A.Sterling Joinery Ltd | Construction | 2018 |