| 55 Wickham Road Freehold Limited | Households | 2023 |
| 55 Wickham Road RTM Company Limited | Households | 2022 |
| 5514 Ltd | Real estate | 2023 |
| 568 Media Ltd | Information & communication | 2024 |
| 59-61 Croydon Road Freehold Limited | Households | 2018 |
| 5HADEZ Global Ltd | Transport & logistics | 2020 |
| 5O5 Design Ltd | Professional & scientific | 2026 |
| 605 Garratt Lane Limited | Households | 2016 |
| 64BITS Technologies Limited | Information & communication | 2013 |
| 67 Brighton Road Ltd | Real estate | 2018 |
| 68 Mulgrave Road Freehold Limited | Households | 2018 |
| 6S Infinity Ltd | Professional & scientific | 2013 |
| 7 & Blue Limited | Information & communication | 2021 |
| 715 Ltd | Real estate | 2023 |
| 72 Brixton Water Lane Limited | Households | 1999 |
| 72 Cedar Drive Residents Limited | Households | 2024 |
| 73 Copers Cope Road Limited | Households | 2022 |
| 777 Leisure Limited | Hospitality | 2014 |
| 78 Claverton Street (Management) Limited | Real estate | 1994 |
| 8 Brackley Road Residents Company Limited | Households | 2007 |
| 84 Avenue Road Ltd | Households | 2022 |
| 888 Rigging Ltd | Construction | 2024 |
| 89-95 Birkbeck Road Limited | Households | 2005 |
| 91 Lucien Road Residents Limited | Households | 2014 |
| 93 Belvedere Road Limited | Real estate | 1999 |
| A & D Beauty Group Ltd | Other services | 2026 |
| A & D International Trade Co., Ltd | Extraterritorial | 2023 |
| A & T Industry Co., Limited | Extraterritorial | 2011 |
| A &B Discount Tyres Ltd | Wholesale & retail | 2024 |
| A Argyi Limited | Wholesale & retail | 2025 |
| A Class Wholesales Auto Parts Co., Ltd | Extraterritorial | 2014 |
| A Curious Space Limited | Administrative & support | 2019 |
| A CUT Above Beckenham Limited | Other services | 2026 |
| A K S Contracts Limited | Other services | 2017 |
| A MU Trading Co., Ltd | Wholesale & retail | 2021 |
| A S N Associates Limited | Administrative & support | 2007 |
| A&A Construction London Ltd | Construction | 2023 |
| A&A UK Trading Ltd | Wholesale & retail | 2020 |
| A&B Beckenham Tyres Limited | Wholesale & retail | 2026 |
| A&D Eagles Building & Renovation Limited | Construction | 2023 |
| A&L Doyle Ltd | Real estate | 2025 |
| A&M Garden and General Maintenance Ltd | Construction | 2020 |
| A&Z International Trading Ltd | Wholesale & retail | 2012 |
| A-Food Group Ltd | Wholesale & retail | 2023 |
| A-Ihome Furniture Ltd | Extraterritorial | 2018 |
| A.D. Textile Co., Ltd | Extraterritorial | 2014 |
| A.English Interiors & Homeware Ltd | Wholesale & retail | 2023 |
| A.N.T Services Ltd | Professional & scientific | 2026 |
| A.R.E. Medical Ltd | Manufacturing | 2023 |
| A.S. Construction & Landscapes Limited | Construction | 2020 |
| A/K Surfacing Ltd | Construction | 2012 |
| A1 Mane Limited | Wholesale & retail | 1968 |
| A25 Garage Limited | Administrative & support | 2014 |
| A2Z Refurbishment Limited | Construction | 2014 |
| A3 Architecture London Ltd. | Professional & scientific | 2009 |
| AAA Removals Limited | Transport & logistics | 2008 |
| Aaam Private Hire Limited | Professional & scientific | 2012 |
| Aabbccdd Limited | Arts & recreation | 2019 |
| AAF Services Ltd | Professional & scientific | 2019 |
| AAG Building Ltd | Construction | 2025 |
| AAR Recovery Ltd | Transport & logistics | 2025 |
| Aaron Court Residents Association Limited | Real estate | 1987 |
| AB Audio & Broadcast Limited | Information & communication | 2021 |
| ABA Trading Ltd | Wholesale & retail | 2024 |
| Abba Technology Limited | Extraterritorial | 2011 |
| Abbie's Hair Limited | Other services | 2010 |
| Abbots Way Leisure Gardens Limited | Arts & recreation | 2020 |
| ABC Rfid Limited | Wholesale & retail | 2023 |
| ABC VC Ltd | Wholesale & retail | 2023 |
| Abla's Kitchen Ltd | Hospitality | 2026 |
| Able Design & Build Ltd | Construction | 2024 |
| Abner-Electric Limited | Extraterritorial | 2016 |
| Abotelli & Maison Ltd | Real estate | 2018 |
| About My Generation Limited | Information & communication | 2006 |
| ABR Electrical Ltd | Construction | 2026 |
| Abroma Co., Ltd. | Extraterritorial | 2015 |
| Abso Home Limited | Extraterritorial | 2021 |
| Absolute Risk Consulting Ltd | Financial services | 2017 |
| Absolute Service & Maintenance Limited | Construction | 2014 |
| Abundantenergy Limited | Extraterritorial | 2022 |
| AC Mortgages Limited | Financial services | 2015 |
| Academy for Innovation Limited | Professional & scientific | 2010 |
| Academy of Rhetoric Ltd | Professional & scientific | 2017 |
| Academy Wood Flooring Limited | Construction | 2019 |
| ACC Garage Services Ltd | Wholesale & retail | 2013 |
| ACC Travel Limited | Extraterritorial | 2016 |
| Access Corporation Limited | Wholesale & retail | 2024 |
| Accessible International Trading Co., Ltd | Manufacturing | 2024 |
| Accessory International Co., Ltd | Manufacturing | 2024 |
| Accio Global Ltd | Professional & scientific | 2016 |
| Accolmile Innovation Ltd | Wholesale & retail | 2021 |
| Accommadata Ltd | Real estate | 2009 |
| Acconsys Industrial Co., Ltd | Manufacturing | 2016 |
| Accordian Law Limited | Professional & scientific | 2015 |
| Accsio Trading Co., Ltd | Extraterritorial | 2025 |
| Accurate QS Limited | Professional & scientific | 2020 |
| Acdc CN Ltd | Extraterritorial | 2021 |
| Ace Aegis Education Limited | Education | 2025 |
| Ace Chemical Ltd | Wholesale & retail | 2019 |
| Ace Global Enterprises Ltd | Wholesale & retail | 2021 |