| 1ST Call Plumbing & Heating Solutions Ltd | Construction | 2010 |
| 2D Projects Ltd | Construction | 2018 |
| 2EVOLVE Mind Body Spirit Limited | Arts & recreation | 2003 |
| 3MAN Security Limited | Administrative & support | 2024 |
| A C Elite Ltd | Professional & scientific | 2020 |
| A Little Room of Therapy Ltd | Health & social care | 2021 |
| A Mistretta Products Ltd | Wholesale & retail | 2022 |
| A&I Flowers Limited | Wholesale & retail | 2025 |
| A. Hadham Construction Limited | Construction | 2011 |
| A.E.Ward & SON Limited | Wholesale & retail | 1958 |
| A.J.T.Investments Limited | Construction | 1959 |
| A10 Electrical Solutions Ltd | Construction | 2021 |
| Abbey Motorist Centre Limited | Wholesale & retail | 2002 |
| ABC Abode Ltd | Real estate | 2021 |
| ABC Building & Maintenance Contractors Limited | Construction | 1997 |
| ABC Pre-School (Dagenham) Limited | Education | 2017 |
| ABC1 Holdco Limited | Financial services | 2017 |
| About Distribution Ltd | Wholesale & retail | 2024 |
| Acculith Ltd | Manufacturing | 2016 |
| Acculith Print Ltd | Manufacturing | 2026 |
| Acme Solutions Ltd | Administrative & support | 2017 |
| Actforce Limited | Professional & scientific | 2003 |
| Adaptive Sales Group Ltd | Professional & scientific | 2024 |
| ADL Driver Hire Ltd | Transport & logistics | 2018 |
| Advanced Workplace Associates Limited | Professional & scientific | 1992 |
| Aflame Ministries International Ltd | Other services | 2020 |
| Aimclock Limited | Real estate | 1989 |
| AJH Hardy (UK) Limited | Administrative & support | 2019 |
| AJR Letting Services Limited | Real estate | 2016 |
| Alan Bird Food ETC. Ltd | Hospitality | 2012 |
| Alan Tanfield Taxi Services Ltd | Transport & logistics | 2015 |
| Albcon Limited | Construction | 2021 |
| Albury Carpentry and Construction Limited | Construction | 2011 |
| Alec Oakley Limited | Construction | 1995 |
| ALL Broker Services Limited | Financial services | 2015 |
| Allium 2 Ltd | Real estate | 2012 |
| Allstar Roofing & Maintenance Ltd | Construction | 2025 |
| Alxndr Group Ltd | Construction | 2014 |
| Ameer Design Limited | Professional & scientific | 1997 |
| Ammastep Limited | Real estate | 2019 |
| Ammoury Limited | Wholesale & retail | 2021 |
| AMZ Solutions Ltd | Construction | 2022 |
| Andree Cooke Limited | Professional & scientific | 2015 |
| Antoine Productions Limited | Professional & scientific | 2017 |
| AOS Heating Limited | Construction | 2010 |
| AOS Service Cover Limited | Construction | 2010 |
| APA Events and Security Limited | Other services | 2014 |
| Apple Blossom Childcare (ABC) Limited | Education | 2014 |
| Aria Sourcing Limited | Wholesale & retail | 2023 |
| Armitage BC1 Limited | Real estate | 2017 |
| Armsby Consultancy Limited | Health & social care | 2015 |
| Ascendancy Analytics Ltd | Agriculture & fishing | 2025 |
| Aspen Place Management Company Limited | Households | 2006 |
| Asset Growth Limited | Financial services | 2021 |
| Assimisys Limited | Administrative & support | 2023 |
| Assured Textile Ltd | Wholesale & retail | 2020 |
| AST Building Services Limited | Construction | 2010 |
| Astar Consultancy Ltd | Real estate | 2023 |
| Atomic Heating Ltd | Professional & scientific | 2008 |
| B D Hardy Holdings Limited | Construction | 2005 |
| B&M Traders Limited | Wholesale & retail | 2017 |
| B.D. Hardy (Ductwork Contractor) Limited | Construction | 1989 |
| B.J.A Cleaning Services Limited | Other services | 2012 |
| Badger BC Investments Limited | Real estate | 2013 |
| Balance My Books Limited | Professional & scientific | 2023 |
| Balmoral Furniture Ltd | Wholesale & retail | 2008 |
| Bar Brothers Events Ltd | Hospitality | 2020 |
| Barbican City Studio Limited | Manufacturing | 2002 |
| Barbican Property Solutions Ltd | Construction | 2020 |
| Barfoot (London) Limited | Wholesale & retail | 2015 |
| Baris Meat Ltd | Wholesale & retail | 2021 |
| Bartsch Heating & Plumbing Limited | Construction | 2008 |
| Base Training Ltd | Education | 2020 |
| Basement Consulting Limited | Construction | 2015 |
| Bathrooms Boilers Spares Hornchurch Limited | Wholesale & retail | 2016 |
| Bayliss & SON (Builders) Limited | Construction | 1994 |
| BCM Group Limited | Administrative & support | 1973 |
| BE Smart.Co (UK) Limited | Information & communication | 2013 |
| Becondale Ltd | Wholesale & retail | 1999 |
| Belgrave Ceramics Ltd | Wholesale & retail | 2024 |
| Bensted Associates Ltd | Professional & scientific | 2003 |
| Berkana Limited | Construction | 1994 |
| Berts Brickwork Ltd | Construction | 2013 |
| Best Epos Limited | Other services | 2017 |
| Beyoutiful World Limited | Other services | 2017 |
| Big Time Graphics Limited | Other services | 2013 |
| Birling Group Limited | Financial services | 1986 |
| Bitgenie Limited | Information & communication | 2019 |
| Bluestone Consultants Ltd | Professional & scientific | 2012 |
| BOB Towler Consultancy Ltd | Construction | 2020 |
| Bodytec Vehicle Repairs Limited | Manufacturing | 2017 |
| Bongiorno Investments Limited | Financial services | 2005 |
| Boom City TV Ltd. | Information & communication | 2017 |
| Boord Street Management Company Limited | Real estate | 2024 |
| Bounds Green Management Company Limited | Households | 2005 |
| Bourneside Residents Company Limited | Households | 1988 |
| Bramwood Court Management Company Limited | Households | 2003 |
| Bridge Overseas Limited | Administrative & support | 1995 |
| Brindley Educational Consultancy Limited | Education | 2016 |
| Brindley Millen Limited | Professional & scientific | 1994 |