| (CPL Services) Charles & Partners Limited | Financial services | 2011 |
| 1 Construction (South East) Ltd | Construction | 2024 |
| 1 Verad Group Ltd | Education | 2026 |
| 10 Bolton Gardens Limited | Households | 2001 |
| 103 Brighton Road (Sutton) Limited | Households | 1990 |
| 114 Foxley Lane Limited | Households | 2022 |
| 13NINETYNINE Ltd | Real estate | 2022 |
| 14 Spencer Road RTM Company Limited | Households | 2017 |
| 158PR Ltd | Real estate | 2021 |
| 19 ST Pauls Ltd | Real estate | 2026 |
| 1ST Class Cars (South East) Limited | Transport & logistics | 1999 |
| 1ST Stop Audio Visual Limited | Wholesale & retail | 2002 |
| 207 Reedham Court Ltd | Real estate | 2018 |
| 21ST Century Filmworks Limited | Information & communication | 2009 |
| 22 Downs Court Road Limited | Households | 2012 |
| 24 Lodge Road RTM Company Limited | Hospitality | 2009 |
| 26THEPINES Limited | Real estate | 2015 |
| 27 Melbourne Road Residents Association Limited | Households | 1974 |
| 28 Grasmere Road RTM Company Limited | Households | 2022 |
| 319GB Limited | Real estate | 2020 |
| 3MG Limited | Professional & scientific | 2006 |
| 3PLUS International Ltd | Administrative & support | 2011 |
| 41 Foxley Management Limited | Real estate | 2025 |
| 44-54 Chepstow Rise (Freehold) Limited | Households | 1999 |
| 46 Alton Road RTM Company Limited | Households | 2011 |
| 49 CR4 Ltd | Construction | 2021 |
| 4FLOW UK Limited | Transport & logistics | 2022 |
| 4HOMEOWNERS Limited | Households | 2015 |
| 5 Havelock Road Management Limited | Households | 2002 |
| 50 Smitham Bottom Lane Limited | Households | 2014 |
| 55 Brighton Road (Purley) Management Limited | Households | 2009 |
| 57 Selcroft Road Ltd | Real estate | 2018 |
| 58:12 | Other services | 2003 |
| 58:12 Enterprises Limited | Extraterritorial | 2021 |
| 59 Carshalton Road Management Co Ltd. | Households | 2011 |
| 59 Selcroft Road Ltd | Real estate | 2018 |
| 6 Park Road Management Company Limited | Households | 2008 |
| 632 Consulting Limited | Professional & scientific | 2024 |
| 66 Purley Park Road Limited | Households | 2023 |
| 6TH Gear Coaching and Consultancy Ltd | Professional & scientific | 2021 |
| 78 Higher Drive Limited | Real estate | 2022 |
| 8 Acorn Developers Ltd | Real estate | 2018 |
| 8 Kearton Close Residents Ltd | Households | 2026 |
| 80 Croham Road Limited | Construction | 2022 |
| 837 Brighton Road Limited | Real estate | 2011 |
| 84 Sumner Road RTM Company Limited | Households | 2006 |
| 859 Brighton Road Freehold Management Company Limited | Real estate | 2023 |
| 87 Castelnau Residents Company Limited | Households | 1983 |
| 8AI Ltd | Information & communication | 2024 |
| 8T1CONNECTIONS Ltd | Information & communication | 2019 |
| 91 Lansdowne Way Residents Company Limited | Administrative & support | 1993 |
| A & K Constructions Services Limited | Construction | 2025 |
| A & L Strategic Business Solutions Limited | Wholesale & retail | 2010 |
| A a B Electrical and Plumbing Contractors Ltd | Construction | 2002 |
| A and S Collection Ltd | Wholesale & retail | 2025 |
| A Browne Financial Services Limited | Financial services | 2025 |
| A J Green Plumbing Services Limited | Construction | 2003 |
| A P Smith & Co. Limited | Professional & scientific | 2007 |
| A P Smith Secretarial Services Limited | Professional & scientific | 2007 |
| A Plus Refurbishment & Maintenance Ltd | Construction | 2021 |
| A&D Healthcare Limited | Health & social care | 2022 |
| A&Z Property Holdings Ltd | Real estate | 2021 |
| Aabytec Ltd | Information & communication | 2013 |
| Aakk Limited | Administrative & support | 2016 |
| Aantzz Limited | Professional & scientific | 2010 |
| Aarden Productions Ltd | Arts & recreation | 2025 |
| Aaresh Ltd | Real estate | 2024 |
| Aariam Limited | Information & communication | 2014 |
| Aarush Business Consultancy Ltd | Professional & scientific | 2014 |
| Aasa Properties Ltd | Real estate | 2024 |
| Aasm Trading Ltd | Real estate | 2013 |
| Abbot Medical Practice Ltd | Health & social care | 2002 |
| Abhees Housing Ltd | Real estate | 2018 |
| Abi's Hair & Beauty Ltd | Other services | 2026 |
| Absolute Allied Consultancy Ltd | Professional & scientific | 2024 |
| Absolute Faith Care Limited | Health & social care | 2018 |
| Absolute Wines Ltd | Wholesale & retail | 2022 |
| ACCESS2ACHIEVE CIC | Arts & recreation | 2026 |
| Accident Claim Help Limited | Information & communication | 2013 |
| Accolade Catering Limited | Hospitality | 2019 |
| Accord Marine Service Ltd | Administrative & support | 2007 |
| Accotech Ltd | Professional & scientific | 2020 |
| Accounts Express Ltd | Construction | 2007 |
| Accusolve Accountants Ltd | Professional & scientific | 2025 |
| Aceym Design Solutions Ltd | Professional & scientific | 2017 |
| ACM Financial Ltd | Professional & scientific | 2016 |
| Acmie Security Limited | Administrative & support | 2025 |
| Acorn Bespoke Catering Ltd | Hospitality | 2018 |
| Acorn Bespoke Chilled Ltd | Manufacturing | 2018 |
| Acornfern Property Management Company Limited | Households | 1991 |
| Actuaria Consulting Ltd | Professional & scientific | 2017 |
| Actuaria Holdings Ltd | Real estate | 2019 |
| Acuity Assets Limited | Real estate | 2011 |
| Acyuta Properties Limited | Real estate | 2019 |
| Adapt to Learn Limited | Education | 2018 |
| Adero Consulting Limited | Information & communication | 2024 |
| Adeshina Ltd | Real estate | 2023 |
| Adeste Advisory Limited | Administrative & support | 2019 |
| Aditinic Limited | Other services | 1959 |
| Adiyogi HC Ltd | Arts & recreation | 2026 |