| 1-12 Ridsdale Close Management Company Limited | Households | 1991 |
| 100% Marketing Limited | Information & communication | 2006 |
| 121 Osborne Road Management Limited | Professional & scientific | 2003 |
| 14 Northumberland Terrace Management Limited | Households | 1993 |
| 17-32 ST Just Management Co. Limited | Real estate | 1999 |
| 1ROOM Ltd | Hospitality | 2002 |
| 1ST Choice Upholstery Ltd | Manufacturing | 2003 |
| 2 Warkworth Terrace Tynemouth Limited | Real estate | 1997 |
| 32 Lesbury Road Management Company Limited | Households | 1999 |
| 33/48 ST Just Place Management Company Limited | Households | 2001 |
| 35 Percy Gardens Management Company Limited | Hospitality | 2002 |
| 42 Alma Place Management Company Limited | Extraterritorial | 2006 |
| 42 Percy Park (Tynemouth) Management Company Limited | Households | 2001 |
| 7 Stars Capital Limited | Real estate | 2025 |
| A. K. Lowrey Limited | Agriculture & fishing | 1997 |
| A.C.T Construction Services Limited | Construction | 2003 |
| A.M. Watt Design & Build Limited | Construction | 1987 |
| A.T.S. Properties Limited | Real estate | 1998 |
| A.T.S. Residential Limited | Real estate | 1998 |
| ABI Properties Limited | Real estate | 2004 |
| Abigail Court Management Limited | Households | 1996 |
| Abra MOT Centre Limited | Wholesale & retail | 2006 |
| Academe Computing Limited | Information & communication | 1996 |
| Access & Inclusion by Design Ltd | Professional & scientific | 2006 |
| Active Chiropractic Clinic (NE) Ltd | Health & social care | 2004 |
| Administration & Accounting Services Limited | Professional & scientific | 2003 |
| Advanced Welding Solutions Limited | Construction | 2005 |
| AFM Technical Support Limited | Real estate | 2001 |
| AGM Facility Services Ltd | Construction | 2005 |
| Aihri Ltd | Professional & scientific | 2026 |
| Alan Edmiston Consultancy Ltd | Education | 2005 |
| Alan Frazer Limited | Construction | 2003 |
| Alan Rowe Signs & Graphics Limited | Administrative & support | 2000 |
| Albany Storage Company Limited | Transport & logistics | 1962 |
| Almizan Continental Food Store Ltd | Wholesale & retail | 2009 |
| Ambsol Limited | Arts & recreation | 1996 |
| AND Group Limited | Information & communication | 1988 |
| AND Holdings Ltd | Professional & scientific | 1999 |
| Andy Lees Painting Services Ltd | Construction | 2006 |
| Angel Window Cleaners Limited | Administrative & support | 2007 |
| Antonio & Paul Developments Limited | Real estate | 2004 |
| Applied Glass Films Limited | Administrative & support | 1996 |
| Arcade Fish Restaurant Limited | Hospitality | 2004 |
| Archers Court Residents Association Limited | Households | 2004 |
| Arion Acquisitions Limited | Real estate | 2019 |
| Armstrong Engineering (NE) Limited | Wholesale & retail | 2003 |
| Armstrongs (Hull) Limited | | 1920 |
| Ashley Bathrooms (N.E) Limited | Wholesale & retail | 1946 |
| Ashley Timber Limited | Wholesale & retail | 1988 |
| Ashleys Hair Salon Limited | Other services | 2003 |
| Ashreinu | Education | 2003 |
| AT & MB Investments Ltd | Financial services | 2025 |
| Athena (Teesside) Limited | Health & social care | 2025 |
| Auto Cosmetics North East Limited | Manufacturing | 2007 |
| Avondale Court Limited | Households | 1982 |
| Awitt | Education | 1996 |
| AWS Contracts Limited | Construction | 1996 |
| Aynsley Windows & Conservatories LLP | | 2002 |
| B & K Electricals Limited | Other services | 2003 |
| B. Fitzgibbon & SON Limited | Construction | 1980 |
| Baer Hatora Ltd | Education | 2000 |
| Bamburgh Court Management Company Limited | Households | 1991 |
| Bangkok Palace Limited | Hospitality | 2006 |
| Barbour (Europe) Limited | Wholesale & retail | 1983 |
| Beacon Electrical (N.E.) Limited | Wholesale & retail | 1983 |
| Beacon House Management Company(Whitley Bay)Limited | Households | 1961 |
| Beckdown Limited | | 1983 |
| Beechcroft Flats Company Limited | Households | 1959 |
| Behsa N.E. Ltd | Wholesale & retail | 2015 |
| Bell Anderson Limited | Professional & scientific | 2005 |
| Benwell Christian Shop Project | Education | 1989 |
| Beyond Measure Limited | Professional & scientific | 2006 |
| Big BOY Inns Limited | Hospitality | 2005 |
| Bill Richardson Limited | Wholesale & retail | 1996 |
| Bill Sullivan Design Limited | Professional & scientific | 2004 |
| Birchlace Construction Limited | | 1983 |
| Bisham Consulting Limited | Professional & scientific | 2004 |
| Bisham Limited | Professional & scientific | 2004 |
| Bishop Auckland Precast Concrete Limited | Wholesale & retail | 1983 |
| Blaydon Communications Limited | Other services | 1972 |
| Blttho Ltd | Financial services | 2026 |
| Blythman & Partners Limited | Professional & scientific | 2002 |
| Blythswood Managers North & South Limited | Households | 2005 |
| BMC Wealth Management Ltd | Professional & scientific | 2020 |
| BOB Moncur Limited | Arts & recreation | 2002 |
| Book a Golf Holiday Ltd | Other services | 2009 |
| Boro T.V. Limited | Information & communication | 2005 |
| Brag Engineering Limited | Manufacturing | 1990 |
| Brewster & Co (NE) Ltd | Professional & scientific | 2006 |
| Bric Bloc Limited | Real estate | 2002 |
| Bride`S Dream Ltd | Wholesale & retail | 2003 |
| Bridgewater Bacon Limited | Wholesale & retail | 2006 |
| Britannia Auto Centre Limited | Wholesale & retail | 2000 |
| Broadway West Management (Gosforth) Limited | Households | 2001 |
| Brodies Plumbing & Heating Ltd | Construction | 2024 |
| Brooke Consulting Limited | Professional & scientific | 2024 |
| Broyd's Ltd | Wholesale & retail | 2002 |
| BS Joinery North East Ltd | Construction | 2023 |
| BT GAS Heating Services Limited | Construction | 2004 |
| Budle Sands Management Co. Limited | Households | 2003 |