| 102 BG Ltd | Real estate | 2006 |
| 11 Consultancy Limited | Professional & scientific | 2026 |
| 115 Alma Road Limited | Households | 1995 |
| 118 Green Wrythe Lane Limited | Households | 2025 |
| 13 High Street Residents Ltd | Households | 2024 |
| 134 Carshalton Park Road RTM Company Limited | Real estate | 2007 |
| 148 Sunnyhill Road, London Limited | Real estate | 1994 |
| 15 Athelstan Road Limited | Households | 2016 |
| 16 Sixty Retail Limited | Wholesale & retail | 2011 |
| 169/169ACPR RTM Company Ltd | Households | 2011 |
| 188 Amesbury Avenue Limited | Real estate | 2015 |
| 1ST Class Coders Ltd | Education | 2019 |
| 1ST Class School of Motoring Limited | Education | 2017 |
| 1ST Class Training Limited | Education | 2016 |
| 2 Beeches Avenue Ltd | Wholesale & retail | 2017 |
| 2025 Investments Limited | Real estate | 2017 |
| 22 - 24 Rochester Road Property Management Company Ltd | Real estate | 2020 |
| 22 Campbell Road Management Company Limited | Households | 2004 |
| 22 Park Hill Limited | Households | 2008 |
| 26-31 Beynon Road Limited | Households | 2025 |
| 2M Services Ltd | Administrative & support | 2024 |
| 30 North Street (Carshalton) RTM Company Limited | Households | 2013 |
| 360 Developers Ltd | Construction | 2020 |
| 3RD Grove Mill Management Company Limited(The) | Households | 1987 |
| 3V Solutions Ltd | Professional & scientific | 2019 |
| 409 Ltd | Real estate | 2021 |
| 43 - 51 High Street Carshalton (Freehold) Limited | Households | 2019 |
| 43 Bouverie Road Management Company Limited | Households | 1991 |
| 48 West Limited | Hospitality | 2009 |
| 4TH Grove Mill Management Associates Limited | Households | 1993 |
| 5 C Properties Limited | Other services | 2013 |
| 55 Stanley Square Ltd | Real estate | 2023 |
| 61 North Street Ltd | Households | 2022 |
| 62-76 Colston Avenue Freehold Ltd | Real estate | 2018 |
| 8 Park Hill Management RTM Company Limited | Households | 2009 |
| 84-86 Larkhall Lane Limited | Real estate | 2003 |
| 888 Office Supplies Ltd | Wholesale & retail | 2016 |
| A & a JET Company Limited | Construction | 2010 |
| A D Williams Plumbing Ltd | Construction | 2024 |
| A I Recruitment Solutions Ltd | Professional & scientific | 2023 |
| A Jaku.Electrics Limited | Construction | 2015 |
| A Mawejje Limited | Administrative & support | 2016 |
| A Plus Holdings Group Ltd | Real estate | 2025 |
| A R London Builders Ltd | Construction | 2026 |
| A&B Care Services Limited | Health & social care | 2025 |
| A&Jk Fortuna Ltd | Construction | 2022 |
| A&L Property Care Ltd | Construction | 2025 |
| A-Z Food Distributors Ltd | Wholesale & retail | 2018 |
| A.S. Electrical (Southern) Ltd | Energy | 2007 |
| A1 Print Ltd | Administrative & support | 2016 |
| A2ONE Solutions Ltd | Construction | 2018 |
| AA Associates Ltd | Professional & scientific | 2019 |
| AAB Enterprises Ltd | Wholesale & retail | 2019 |
| Aaghaz Ltd | Real estate | 2020 |
| Aaron & Co Limited | Administrative & support | 2014 |
| Aavm Ventures Limited | Information & communication | 2013 |
| Abeka Market Ltd | Wholesale & retail | 2021 |
| ABI Raami Enterprise Ltd | Hospitality | 2025 |
| Abnm Ltd | Real estate | 2024 |
| Above & Below Networks Limited | Information & communication | 2023 |
| Abraham Consulting & Management Services Ltd | Real estate | 2021 |
| ABZ Installations Ltd | Construction | 2017 |
| Acccan Investments Ltd | Real estate | 2024 |
| Accendo Fire & Security Ltd | Construction | 2011 |
| Access Locks & Security Limited | Administrative & support | 2005 |
| Acclaim Consulting Solutions Limited | Professional & scientific | 2008 |
| Accountancy Numbers Ltd | Professional & scientific | 2016 |
| Accounts LAB Limited | Extraterritorial | 2025 |
| Accuris Financial Consulting Limited | Professional & scientific | 2024 |
| Accuris Properties Limited | Real estate | 2026 |
| Across Oceans Limited | Wholesale & retail | 2018 |
| ACS Random Ltd | Arts & recreation | 2014 |
| Actfirst Medical Services Limited | Education | 2025 |
| Actimo Limited | Professional & scientific | 2003 |
| Activated Marketing Limited | Wholesale & retail | 1996 |
| Acumen International Ltd | Education | 2023 |
| AD Flooring Contracts Ltd | Construction | 2009 |
| Adams Financial Systems Limited | Information & communication | 2006 |
| Adhola Investment Group Limited | Wholesale & retail | 2020 |
| Adrian Talpade Ltd | Professional & scientific | 2004 |
| Advance Blue Flame Ltd | Construction | 2018 |
| Advanced Precision Marketing Ltd | Professional & scientific | 2011 |
| Aero United Ltd | Wholesale & retail | 2024 |
| Aerolink Technix Limited | Administrative & support | 2015 |
| Aeroprime Group UK Ltd | Administrative & support | 2023 |
| Aesthetics by JLS Ltd | Other services | 2021 |
| AFC Ballers CIC | Arts & recreation | 2025 |
| Affordable Property Solutions Ltd | Construction | 2026 |
| AFR Property Services Ltd | Real estate | 2021 |
| Afroglicious Limited | Wholesale & retail | 2026 |
| Agara Creations Ltd | Administrative & support | 2016 |
| AGD Conglomerate CIC | Information & communication | 2024 |
| Agisoft Limited | Manufacturing | 2018 |
| Agnibroproperties Limited | Real estate | 2024 |
| Aguilo-Leal Limited | Administrative & support | 2018 |
| AI Healthcare UK Academy Ltd | Public administration | 2023 |
| Air Conditioning and Refrigeration Industry Board | Professional & scientific | 1995 |
| AIV Limited | Professional & scientific | 2023 |
| AJ Cars Limited | Wholesale & retail | 2020 |
| AJ Coaching & Mentoring Ltd | Administrative & support | 2025 |