| 101 Messina Avenue Limited | Households | 2022 |
| 14-19 Linnet Close Ltd | Households | 2020 |
| 16-18 Woodhouse Lodge Limited | Real estate | 2015 |
| 161-165 Ashfield Avenue Limited | Households | 2023 |
| 17 & 19 Highwood Avenue Freehold Limited | Households | 2025 |
| 1ST Avenue GAS Ltd | Construction | 2025 |
| 200OK Solutions Ltd | Information & communication | 2014 |
| 230-236 (Even) Merry Hill Road Ltd | Households | 2020 |
| 247 Lead Generation (UK) Ltd | Construction | 2019 |
| 247 Roofing Maintenance (UK) Ltd | Construction | 2019 |
| 258 Property Management Ltd | Administrative & support | 2022 |
| 2D Corporation Limited | Construction | 2025 |
| 2DKA Limited | Professional & scientific | 2012 |
| 3 Henrietta Street Limited | Hospitality | 2020 |
| 3 L Nails & Beauty Limited | Other services | 2022 |
| 3 of Life Limited | Information & communication | 2026 |
| 3D Chestnut Limited | Real estate | 2019 |
| 3D Corporation Limited | Real estate | 2008 |
| 3D Investment NO 2 Limited | Real estate | 2021 |
| 3D Investment Properties Limited | Construction | 2018 |
| 3LN Ltd | Real estate | 2025 |
| 3SES Security Ltd | Administrative & support | 2023 |
| 43 High Street RTM Company Limited | Households | 2022 |
| 47 Aldenham Road Limited | Households | 2022 |
| 48 West END Road Limited | Extraterritorial | 2010 |
| 49 Aldenham Ltd | Real estate | 2018 |
| 49 Aldenham Road Ltd | Real estate | 2026 |
| 5 Stars Investments Ltd | Real estate | 2024 |
| 5-13 Linnet Close Freehold Limited | Households | 2020 |
| 54 Litchfield Gardens RTM Company Limited | Real estate | 2015 |
| 58 - 60 Glenhurst Road Limited | Real estate | 2020 |
| 74 Bushey Hall Road Property Limited | Households | 1998 |
| 8888 Ltd | Real estate | 2023 |
| 96 Estcourt Road Ltd | Households | 2018 |
| :Fletcher Jacob Limited | Other services | 2009 |
| A & E Medical Administration Services Ltd | Administrative & support | 2016 |
| A B Personal Services Limited | Other services | 2026 |
| A D Murphy Limited | Professional & scientific | 2022 |
| A Dino Contractors Ltd | Construction | 2018 |
| A Donaghey Builders Limited | Construction | 2018 |
| A Halford Limited | Other services | 2014 |
| A Little Bird Collective Ltd | Manufacturing | 2021 |
| A Little HUG in a Box Ltd | Wholesale & retail | 2020 |
| A Love Mechanical Solutions Ltd | Wholesale & retail | 2019 |
| A M & a Consulting Limited | Professional & scientific | 2015 |
| A N R Accountants Limited | Professional & scientific | 2014 |
| A Penfold Electrical Contractor Ltd | Construction | 2008 |
| A S Claims Solutions Limited | Other services | 2017 |
| A Star Tuition London Ltd | Education | 2025 |
| A. Ilendo Property Development Limited | Construction | 2004 |
| A2A Logistics Ltd | Other services | 2015 |
| A3 Waste Management Ltd | Water & waste | 2018 |
| Aamas Investments Ltd | Financial services | 2025 |
| Aanya Accountancy Ltd | Professional & scientific | 2025 |
| Aarkay Property Management Ltd | Real estate | 2019 |
| Aarpee Consultants Limited | Professional & scientific | 2006 |
| Aaryan Trends Ltd | Professional & scientific | 2015 |
| Aashni Shah Editorial Consultancy Limited | Information & communication | 2022 |
| Aavi Ltd | Professional & scientific | 2012 |
| Abacus Lending Solutions Ltd | Financial services | 2018 |
| Abbas Property Investments Ltd | Financial services | 2023 |
| Abbey Hill Limited | Professional & scientific | 2018 |
| Abbey Orchard Limited | Construction | 2014 |
| ABM Capital Ventures Limited | Real estate | 2020 |
| Absolutelink Ltd | Professional & scientific | 2024 |
| AC Lifestyle & Properties Ltd | Real estate | 2026 |
| Access Direct Financial Services Ltd | Financial services | 1999 |
| Accriva Accountants Limited | Professional & scientific | 2026 |
| Ace Financial Planning Limited | Financial services | 2004 |
| Ace Optics Limited | Health & social care | 2012 |
| Acer RTM Company Limited | Extraterritorial | 2026 |
| ACL Haulage Ltd | Construction | 2016 |
| Acom Construction Ltd | Construction | 2015 |
| Acriton Limited | Real estate | 2017 |
| ACS Photography Ltd | Professional & scientific | 2025 |
| Acuity Plus Limited | Professional & scientific | 2017 |
| AD Hair 2026 Ltd | Other services | 2026 |
| ADF Legal Consulting Limited | Professional & scientific | 2023 |
| Adidev Financial Solutions Limited | Financial services | 2019 |
| ADJ Medical Services Limited | Wholesale & retail | 2025 |
| ADM Investments Limited | Hospitality | 2014 |
| Adora Beauty and Care Ltd | Other services | 2025 |
| ADT Business Continuity Services Ltd | Information & communication | 2015 |
| Aegean Property Group Limited | Real estate | 2016 |
| AEROPARTS247 Limited | Administrative & support | 2026 |
| AFC Radlett Ltd | Arts & recreation | 2024 |
| AGA Innovations Ltd | Construction | 2025 |
| Agregado Construction Ltd | Construction | 2024 |
| Ahimsa London Ltd | Wholesale & retail | 2017 |
| AIM Build Ltd | Construction | 2026 |
| Aimtarget Limited | Construction | 2005 |
| Aimyndshift Limited | Information & communication | 2023 |
| Airavata Investments Ltd | Real estate | 2018 |
| Aivt Logistics Limited | Transport & logistics | 2017 |
| Aj-Sikfar Global Ltd | Wholesale & retail | 2023 |
| AK Marketing Consulting Ltd | Information & communication | 2026 |
| Akanksha Reporting Ltd | Health & social care | 2020 |
| Akbarali Investments Ltd | Real estate | 2023 |
| AKC Property Ltd | Real estate | 2014 |
| Aktinium Technologies Limited | Manufacturing | 2015 |