| 89 Bromley Common (Residents Association) Limited | Households | 1984 |
| 9/10 Palace Grove Management Limited | Households | 1983 |
| 90 Oakdene Limited | Households | 2026 |
| 9092 Catering Co Ltd | Hospitality | 2020 |
| 92 Endymion Limited | Professional & scientific | 1986 |
| 94 -102 Kennet Street Freehold Limited | Households | 2025 |
| 9TWELVE UK Ltd | Wholesale & retail | 2018 |
| A & K Palmer Consulting Limited | Professional & scientific | 2015 |
| A & R Business Services Limited | Professional & scientific | 2010 |
| A & S Blake Limited | Real estate | 2003 |
| A 2 Z Flooring Solutions Ltd | Construction | 2016 |
| A a G L Trading Limited | Wholesale & retail | 2017 |
| A Bowyer Accounting Ltd | Professional & scientific | 2025 |
| A Colloff Limited | Professional & scientific | 2017 |
| A F Davies & Sons Properties Limited | Financial services | 2018 |
| A J (PVT) Ltd | Wholesale & retail | 2015 |
| A J Kelly Transport Ltd | Transport & logistics | 2021 |
| A J Pell Carpentry Limited | Construction | 2016 |
| A L Secretarial Services Ltd | Administrative & support | 2012 |
| A PUB in Locksbottom Ltd | Hospitality | 2025 |
| A Team Development Ltd | Construction | 2020 |
| A to Z Accountants Limited | Professional & scientific | 2009 |
| A to Z Logistics Solutions Limited | Transport & logistics | 2022 |
| A Tribe Called Sweat Ltd | Arts & recreation | 2016 |
| A W Management Services Limited | Construction | 2022 |
| A Weston Consulting Ltd | Professional & scientific | 2025 |
| A&A Property Maintenance Kent Limited | Construction | 2021 |
| A&D Events Limited | Professional & scientific | 2014 |
| A&N Electric Limited | Energy | 2025 |
| A&P Hancock Enterprise Ltd | Hospitality | 2012 |
| A&R Vision Property Limited | Real estate | 2025 |
| A&S Property Management Services Ltd | Hospitality | 2017 |
| A&V Pinoy Kitchen UK Ltd | Hospitality | 2021 |
| A&X Bravo Limited | Wholesale & retail | 2021 |
| A-Chord Property Limited | Real estate | 2019 |
| A-Z Soft Ltd | Hospitality | 2014 |
| A-Z Ultimate Services Ltd | Construction | 2023 |
| A. Glasz Limited | Wholesale & retail | 2016 |
| A.C. Wilgar Limited | Construction | 1996 |
| A.C.E Decorators Ltd | Construction | 2023 |
| A.D Capital Carpenters Limited | Construction | 2016 |
| A.D Decor Limited | Construction | 2023 |
| A.D.E Solutions Limited | Information & communication | 2011 |
| A.G.A Tax Services Ltd | Professional & scientific | 2021 |
| A.M.S. International Limited Partnership | | 1998 |
| A.S Cooling Ltd | Extraterritorial | 2026 |
| A.S.A International Orpington Ltd | Wholesale & retail | 2024 |
| A.Wade Limited | Households | 2025 |
| A.Y. Sovereign Solicitors Ltd | Professional & scientific | 2020 |
| A1 Legal Ltd | Administrative & support | 2020 |
| A2D Holding Ltd | Information & communication | 2026 |
| A2R Fincon Trading & Investments Limited | Financial services | 2016 |
| A2R Properties Limited | Real estate | 2019 |
| A3 Enterprise Limited | Real estate | 2014 |
| AA Graphics Limited | Manufacturing | 2014 |
| AA Pantiles Service Ltd | Wholesale & retail | 2023 |
| Aaam Investments Limited | Real estate | 2021 |
| Aact WIN Ltd | Construction | 2019 |
| Aagnee Limited | Wholesale & retail | 2023 |
| Aahaar Limited | Hospitality | 2022 |
| Aahhaa Ltd | Hospitality | 2019 |
| Aahvira Tech Limited | Information & communication | 2026 |
| Aamir Japan Motors Ltd | Wholesale & retail | 2023 |
| Aantarik Group Limited | Administrative & support | 2019 |
| Aaramis Business Solutions Ltd | Administrative & support | 2013 |
| Aarav News Ltd | Wholesale & retail | 2024 |
| Aaravya Investments Ltd | Real estate | 2024 |
| Aarm Limited | Real estate | 2024 |
| Aarya-M Consultancy Ltd | Information & communication | 2022 |
| AB Builders & Sons Limited | Construction | 2018 |
| AB New Homes Limited | Construction | 2024 |
| Abbey Marketing Communications Limited | Manufacturing | 2002 |
| Abbeymet Supplies Limited | Wholesale & retail | 2013 |
| ABC Consortium Limited | Professional & scientific | 2020 |
| Abdelzo Limited | Administrative & support | 2012 |
| Abekjala Ltd | Administrative & support | 2022 |
| Abels Residential Ltd | Real estate | 2022 |
| ABI Construction Services Ltd | Construction | 2022 |
| Abia Holdings Ltd | Real estate | 2018 |
| Abidad Limited | Real estate | 2019 |
| Ability 1ST Limited | Construction | 2007 |
| Abinika Store UK Ltd | Wholesale & retail | 2024 |
| Abizart Limited | Wholesale & retail | 2024 |
| Aboki Financial Services (AFS) UK Ltd | Financial services | 2026 |
| Above and Beyond Lifts Ltd | Professional & scientific | 2024 |
| Aboveandbeyondroofing Ltd | Construction | 2025 |
| Abyer Limited | Health & social care | 2018 |
| Acacia Bay Ltd | Wholesale & retail | 2017 |
| Acadia Homes Limited | Construction | 2024 |
| Acap Associates Limited | Construction | 2013 |
| Accelerated People Management Ltd | Administrative & support | 2022 |
| Access Ropes Ltd | Wholesale & retail | 2015 |
| Accola Property Ltd | Real estate | 1996 |
| Accounting Earth (UK) Limited | Professional & scientific | 2011 |
| Accounting Earth Ltd | Administrative & support | 2011 |
| Accquantic Limited | Information & communication | 2025 |
| Accurate Tech Services Ltd | Professional & scientific | 2021 |
| Ace Automotive Consumables & Equipment Limited | Wholesale & retail | 2008 |
| Ace Cutters (London) Limited | Manufacturing | 1993 |
| Ace Publications Limited | Information & communication | 2010 |