| +A Company Limited | Extraterritorial | 1996 |
| 10 Highbury New Park Freehold Limited | Households | 2015 |
| 29 Marketing Ltd | Professional & scientific | 2014 |
| 2MB Ltd | Construction | 2025 |
| 38/40 Beechcroft Avenue Limited | Households | 2018 |
| 3MAY Kutumb LLP | | 2020 |
| 49-63 Ellement Close Ltd | Households | 2020 |
| 54 Grange Park Maintenance Limited | Households | 2024 |
| @A Company Limited | Extraterritorial | 2000 |
| A & D Engineering (UK) Ltd | Other services | 2013 |
| A & F Assets Ltd | Real estate | 2022 |
| A Different Lenz Ltd | Professional & scientific | 2019 |
| A M Holdings International Limited | Financial services | 2022 |
| A. DEL RIO & Company Limited | Other services | 1986 |
| A. Souto Importers Limited | Other services | 2009 |
| A.P. Sampson Limited | Wholesale & retail | 1947 |
| A.R.D.M Ltd | Real estate | 2025 |
| Aarshi Associates Limited | Professional & scientific | 2015 |
| Aasra Ltd | Real estate | 2018 |
| AB Plumbing & Heating Specialist Ltd | Construction | 2022 |
| Abex Properties Limited | Real estate | 2000 |
| Accomplish Consultancy Limited | Professional & scientific | 2014 |
| Accord Healthcare Limited | Manufacturing | 2002 |
| Accprof Associates Ltd | Professional & scientific | 2018 |
| ACT Trader Technologies Ltd | Information & communication | 2022 |
| Adams Moorhouse Limited | Professional & scientific | 2016 |
| Adma Holding Investment Ltd | Financial services | 2022 |
| Adma Property Investments Ltd | Real estate | 2023 |
| Advani International Limited | Professional & scientific | 2008 |
| AEK Building Services Ltd | Professional & scientific | 2015 |
| AGA Consulting Limited | Extraterritorial | 2021 |
| AIM Educare Limited | Education | 2010 |
| Akira Colors UK Ltd | Hospitality | 2023 |
| AL Nakheel Advertising & Publicity UK Limited | Professional & scientific | 2021 |
| ALL Sparks Ltd | Professional & scientific | 2024 |
| Allibhai Developments Limited | Real estate | 2017 |
| Allibhai Holdings Limited | Construction | 2011 |
| Allibhai Properties Limited | Real estate | 2017 |
| Alpha Omega Electrical Services Limited | Construction | 2021 |
| Alta Consultancy Limited | Administrative & support | 2016 |
| Ankuk Limited | Financial services | 2021 |
| Ansham White Limited | Professional & scientific | 2016 |
| AP Brickworks Development Ltd | Construction | 2021 |
| APM Test Consultants Limited | Information & communication | 2013 |
| Aramay Solutions Limited | Information & communication | 2026 |
| Ardent Environmental Services Limited | Administrative & support | 2003 |
| Argyle Trading Limited | Real estate | 2019 |
| Arks UK Properties Limited | Real estate | 2021 |
| Ashla PVT Limited | Wholesale & retail | 2023 |
| Ashleigh Mann & Co Ltd | Professional & scientific | 2015 |
| Ashpri Properties LLP | | 2017 |
| Ashpri Property Ltd | Real estate | 2017 |
| Asper.Ai Limited | Information & communication | 2019 |
| Astron Research Limited | Professional & scientific | 2004 |
| ATA Express Ltd | Transport & logistics | 2014 |
| ATM Consulting Ltd | Professional & scientific | 2025 |
| AU Partners International Limited | Administrative & support | 2015 |
| Auctus Accountants Ltd | Professional & scientific | 2013 |
| Aura Dental Ltd | Health & social care | 2024 |
| Autobase (GB) Limited | Wholesale & retail | 2011 |
| Autumn Days Care Limited | Health & social care | 2006 |
| Avatan Handling Equipment Limited | Administrative & support | 2009 |
| Avatan Holdings Limited | Financial services | 2019 |
| Avenue Housing Limited | Real estate | 2021 |
| Avigenics Limited | Professional & scientific | 2021 |
| Aviva Holdings Limited | Extraterritorial | 2001 |
| Aviva International Limited | Extraterritorial | 2004 |
| Aviva Optics Limited | Health & social care | 2000 |
| Avtm Holding Company Ltd | Financial services | 2025 |
| AW Health Care Ltd | Health & social care | 2025 |
| Axis Urban Ltd | Construction | 2025 |
| Badgers Buildings Limited | Households | 1986 |
| Badgers Close Limited | Households | 1983 |
| Badgers Freehold Limited | Households | 2004 |
| Bankside Computing Limited | Information & communication | 2011 |
| Barnaby Court Management Limited | Households | 1985 |
| Barnard Systems Limited | Construction | 2014 |
| Barvent Limited | Real estate | 1988 |
| BAS London Ltd | Information & communication | 2023 |
| BBB Consultancy Services Limited | Professional & scientific | 2016 |
| BBK Skin & Aesthetics Ltd | Other services | 2026 |
| Beacon Creations Ltd | Wholesale & retail | 2020 |
| Beacon Organisational Development Limited | Professional & scientific | 2001 |
| Belmont Assets Limited | Financial services | 2023 |
| Belmont Grove Ltd | Wholesale & retail | 2016 |
| Bewise Consultancy Ltd | Professional & scientific | 2021 |
| Bewise Properties Ltd | Real estate | 2025 |
| Bewise Talent Solutions Ltd | Administrative & support | 2024 |
| BG Hold Co Ltd | Financial services | 2026 |
| Bhav Properties Ltd | Real estate | 2017 |
| Binsina Aesthetics Ltd | Other services | 2018 |
| Birchwood Stores Ltd | Wholesale & retail | 2015 |
| Blue Chip Investors Holdings Limited | Real estate | 2025 |
| BNB Holdings PVT Ltd | Real estate | 2019 |
| Boardbridge Global Consultancy Ltd | Professional & scientific | 2025 |
| Boiler LAB Ltd | Construction | 2020 |
| Branding Marketing UK Ltd | Professional & scientific | 2022 |
| Brian Lewis & Co Limited | Professional & scientific | 2007 |
| Brightwell Road (Management) Company Limited | Households | 2002 |
| Britique Foods UK Ltd | Wholesale & retail | 2020 |