| 17 Glenmore Road Limited | Real estate | 2000 |
| 1927 Media Limited | Information & communication | 2013 |
| 23 Hastings Road Limited | Households | 2024 |
| 27 Woodville Road Freehold Limited | Households | 2013 |
| 28 Trading Limited | Other services | 2013 |
| 2POINT4 FM Ltd | Education | 2004 |
| 32 Leighton Road Limited | Households | 2009 |
| 34 Creffield Road Ltd | Households | 2020 |
| 3MT Capital Limited | Other services | 2022 |
| 4 Babki Ltd | Hospitality | 2019 |
| 4 Hamilton Road Management Limited | Households | 1983 |
| 4 Madeley Road Management Limited | Households | 2020 |
| 4 Saville Road Management Limited | Real estate | 1998 |
| 47 the Avenue Limited | Households | 1989 |
| 4B2B Ltd | Professional & scientific | 2016 |
| 5 Castlebar Property Management Ltd | Administrative & support | 2017 |
| 51/51A Little Ealing Lane Management Limited | Households | 2014 |
| 57AG Limited | Financial services | 2022 |
| 58 Madeley Road Management Limited | Households | 2022 |
| 64 Windsor Road Limited | Extraterritorial | 2003 |
| A & C Ballpark Ltd | Arts & recreation | 2024 |
| A & P Ahluwalia Property Limited | Real estate | 2024 |
| A for Anatomy Limited | Wholesale & retail | 2021 |
| A Little Enterprises Ltd | Information & communication | 2025 |
| A Little Properties Ltd | Real estate | 2026 |
| A Z Management Consultancy & Accountancy Ltd | Professional & scientific | 2023 |
| A.C.Properties(Acton)Limited | Financial services | 1946 |
| A1 Heat Limited | | 2010 |
| A3 IT Solutions Ltd | Information & communication | 2015 |
| Abedini Services Ltd | Administrative & support | 2016 |
| Academic Research Consultancy Ltd | Professional & scientific | 2017 |
| Academiq Tuition Limited | Education | 2023 |
| Acee Business Consulting Limited | Professional & scientific | 2019 |
| ACI (London) Limited | Wholesale & retail | 2010 |
| Acumon Advisors Limited | Professional & scientific | 2023 |
| Acumon Commercial Consulting Limited | Professional & scientific | 2026 |
| ADA Law Limited | Professional & scientific | 2019 |
| Adac Global Holdings Ltd | Administrative & support | 2025 |
| Adisa Procurement Solutions Ltd | Information & communication | 2012 |
| Advantax Accountants Ltd | Professional & scientific | 2011 |
| AEC Property Maintenance Ltd | Construction | 2010 |
| AF Collective Ltd | Administrative & support | 2025 |
| Agbts Consultancy Services Limited | Transport & logistics | 2022 |
| AIG UK Construction Ltd | Construction | 2011 |
| Alchemy Innovations Ltd | Administrative & support | 2023 |
| Allen Chiverton Ltd | Construction | 2020 |
| Ally Consulting Limited | Professional & scientific | 2019 |
| Alpha Garden Limited | Administrative & support | 2003 |
| Alpine & Rock Ltd | Hospitality | 2023 |
| Alsaffar Digital Ltd | Information & communication | 2019 |
| AM Exterior Cleaning Solutions Ltd | Administrative & support | 2020 |
| Amathus Drinks PLC | Wholesale & retail | 1982 |
| Amork Ltd | Financial services | 2025 |
| Amruva Ltd | Financial services | 2026 |
| AMW Associates Limited | Information & communication | 2014 |
| Anastasia Court Freehold Limited | Households | 2003 |
| Anastasia Court Management Company Limited | Real estate | 1985 |
| Andrea Atkinson Education Services Limited | Education | 2015 |
| Andrews and Stacey Ltd | Real estate | 2012 |
| Anglo Swiss Property S Limited | Households | 2024 |
| Anyap Ltd | Information & communication | 2023 |
| AP Accessories Ltd | Wholesale & retail | 2020 |
| APN Limited | Real estate | 2002 |
| Arjun Holding Ltd | Extraterritorial | 2019 |
| Arklight Electrical Limited | Construction | 2009 |
| Arlington Road Ealing Management Ltd | Households | 2018 |
| Arpee Estates Ltd | Real estate | 2024 |
| Arsa Services Ltd | Financial services | 2025 |
| Artizan MSM Ltd | Other services | 2023 |
| AS & CJS Group Ltd | Financial services | 2024 |
| Aspiring Higher Limited | Professional & scientific | 2008 |
| Astaan Remit Ltd | Financial services | 2023 |
| Astaan Services Ltd | Administrative & support | 2025 |
| Astar.Renovations Limited | Construction | 2014 |
| Astrovan Productions Ltd | Information & communication | 2025 |
| Aucora Limited | Wholesale & retail | 2022 |
| Audio Comtex Limited | Transport & logistics | 1994 |
| Authentics International Ltd | Professional & scientific | 1997 |
| Aventine TMS Ltd | Information & communication | 2019 |
| Avenue Solicitors Limited | Professional & scientific | 2014 |
| Aviary Films Limited | Information & communication | 2007 |
| Awolesi Group Export & Import Ltd | Wholesale & retail | 2018 |
| AXE & Edge Ltd | Construction | 2025 |
| Axon Media Limited | Professional & scientific | 2013 |
| AY Solicitors Ltd | Professional & scientific | 2022 |
| Ayush Limited | Other services | 2011 |
| AZ Brand Design Limited | Professional & scientific | 2019 |
| B.H.H Motors Ltd | Wholesale & retail | 2023 |
| Baltic RE Ltd | Real estate | 2020 |
| Banbury Court Management Limited | Real estate | 1990 |
| Bar Factory Limited | Hospitality | 2017 |
| Bell-Whether Associates Ltd | Professional & scientific | 2016 |
| Bellamira Café Limited | Wholesale & retail | 2020 |
| Best of Champagne Limited | Wholesale & retail | 2011 |
| Best of France Limited | Wholesale & retail | 2011 |
| Best of New World Limited | Wholesale & retail | 2011 |
| Best of Portugal Limited | Wholesale & retail | 2011 |
| Best of Spain Limited | Wholesale & retail | 2011 |
| Betbalance Health Ltd | Health & social care | 2025 |
| Beth Wightman Represents Ltd | Other services | 2006 |