| 100 to 111 Quarry Hill Road Freehold Company Limited | Households | 2018 |
| 11 Wood Vale Limited | Professional & scientific | 2001 |
| 19 Carlingford Road (Freehold) Company Limited | Real estate | 2020 |
| 1901 Ltd | Other services | 2025 |
| 2 Billion Acres Limited | Professional & scientific | 2016 |
| 2 Brothers Foods Ltd | Hospitality | 2022 |
| 2XSS Lettings Limited | Real estate | 2018 |
| 3 to 3 Zero Zero Ltd | Real estate | 2019 |
| 346 Consultancy Limited | Administrative & support | 2013 |
| 350 Central Avenue RTM Company Limited | Extraterritorial | 2013 |
| 365 Electrical Services Limited | Construction | 2014 |
| 3B Health Ltd | Wholesale & retail | 2024 |
| 3D4M Limited | Real estate | 2019 |
| 3D4M Marketing Limited | Information & communication | 2020 |
| 48/50 Cromer Road Hornchurch Limited | Real estate | 1997 |
| 4986 Miles Ltd | Hospitality | 2023 |
| 4D Piper Ltd | Professional & scientific | 2025 |
| 58 Management Ltd | Arts & recreation | 2011 |
| 5XM Finance and Consulting Ltd | Financial services | 2016 |
| 5XM Limited | Real estate | 1997 |
| 6000 DM LLP | | 2016 |
| 6000 GM Limited | Financial services | 2014 |
| 6000 Opportunities Limited | Professional & scientific | 2020 |
| 7 Days Grocery Ltd | Wholesale & retail | 2025 |
| 70 Station Lane Management Limited | Real estate | 2022 |
| 818ELECTRICAL Ltd | Construction | 2025 |
| 86 Main Road Danbury Limited | Households | 2022 |
| 90 Home Park Road Limited | Households | 2019 |
| 911 Fire Services Limited | Other services | 2009 |
| 9O9I Ltd | Professional & scientific | 2012 |
| 9TEN Consulting Limited | Information & communication | 2023 |
| A & C Haulage Ltd | Water & waste | 2026 |
| A & D GAS Services Ltd | Professional & scientific | 2021 |
| A & R Building Limited | Construction | 1997 |
| A Fantastic Find Ltd | Wholesale & retail | 2026 |
| A Fats Ltd | Health & social care | 2025 |
| A Fine Balance Limited | Wholesale & retail | 2018 |
| A Ghost Digital Ltd | Professional & scientific | 2023 |
| A Hickman Compliance Consultancy Services Ltd | Financial services | 2017 |
| A J Properties Management Ltd | Real estate | 2025 |
| A Latte FUN Ltd | Hospitality | 2026 |
| A Rolfe Window Cleaning Ltd | Administrative & support | 2022 |
| A&E 88 Homes Ltd | Real estate | 2022 |
| A&H Intermediaries Ltd | Professional & scientific | 2023 |
| A&L Patriot Ltd | Construction | 2025 |
| A&M Architectural and Technical Services Ltd | Professional & scientific | 2021 |
| A.C.E. Roofing Co. Ltd | Construction | 1998 |
| A.E.W. Property Services Ltd | Other services | 2010 |
| A.J.C Consulting Ltd | Professional & scientific | 2025 |
| AAA London Electrical Limited | Construction | 2019 |
| Aaron Cutter Property Services Ltd | Other services | 2015 |
| Abba Medical Limited | Health & social care | 2014 |
| ABC Cars (High Street) Limited | Transport & logistics | 2012 |
| Abchak Food UK Ltd | Wholesale & retail | 2023 |
| Abcon Global Products Ltd | Wholesale & retail | 2013 |
| Abdona Limited | Administrative & support | 2006 |
| Aberdeen Universal Shipping Agencies Limited | Transport & logistics | 2020 |
| Absent Aperture Ltd | Wholesale & retail | 2025 |
| Access Europe Ltd | Construction | 2024 |
| Access GAS Services Limited | Construction | 2017 |
| Accheck (UK) Ltd | Information & communication | 2015 |
| Acclaim (UK) Ltd | Professional & scientific | 2014 |
| Accountancy Mariola Kochanska Limited | Professional & scientific | 2012 |
| Accounting Service H.R. Ltd | Professional & scientific | 2013 |
| Accounts House Essex Ltd | Professional & scientific | 2025 |
| Accounts House Group Ltd | Real estate | 2026 |
| Accounts House Limited | Professional & scientific | 2007 |
| Ace Digital Marketing Consultancy Limited | Information & communication | 2017 |
| Ace Drylining Limited | Construction | 2013 |
| Ace Estimating Limited | Financial services | 2013 |
| Ace'Z Services Ltd | Water & waste | 2024 |
| ACG Bespoke Flooring Ltd | Construction | 2022 |
| ACJ Skiphire Ltd | Water & waste | 2016 |
| ACM Resourcing Services Ltd | Administrative & support | 2019 |
| Active Direct Mail Limited | Administrative & support | 1998 |
| Active Feet, Active Minds Ltd | Education | 2014 |
| ACTIVE8 Water Services Ltd | Water & waste | 2023 |
| Adalia Consultancy Ltd | Professional & scientific | 2016 |
| Adam Wilson Ltd. | Construction | 2013 |
| ADC Decorators Ltd | Construction | 2025 |
| Adfam Properties Limited | Real estate | 2020 |
| Adnan Duran Ltd | Other services | 2022 |
| ADR Investment Group Limited | Real estate | 2022 |
| Advance Business Communications Limited | Professional & scientific | 1998 |
| Advance Homes Limited | Real estate | 1999 |
| Advanced Industrial Cleaning Limited | Administrative & support | 2003 |
| AEP Solutions Ltd | Other services | 2024 |
| Aevum Services Limited | Wholesale & retail | 2021 |
| AEW Property Holdings Limited | Other services | 2022 |
| Af&Pe Carpentry Ltd | Construction | 2021 |
| AFG786 Cars Ltd | Wholesale & retail | 2025 |
| AFG786 Transport Ltd | Wholesale & retail | 2022 |
| AFH Property Developments Ltd | Construction | 2024 |
| Afta Electrical Limited | Construction | 2015 |
| AGA Stovemaster Ltd | Manufacturing | 2002 |
| AGM Builders Limited | Construction | 2003 |
| Agni Healthcare Ltd | Health & social care | 2011 |
| AGS Windows Ltd | Manufacturing | 2013 |
| AH Electrical Compliance Ltd | Manufacturing | 2025 |
| AH Electrical Services (Essex) Ltd | Construction | 2025 |