| 08401793 Ltd | Financial services | 2013 |
| 103 Cotham Brow Bristol Management Company Limited | Real estate | 1994 |
| 12 Castledine Road Management Limited | Households | 2018 |
| 15-17HIGH-ST-WARMINSTER-BA129AG Ltd | Real estate | 2022 |
| 1869 Limited | Professional & scientific | 2014 |
| 2B Trading Limited | Professional & scientific | 2021 |
| 3 M Carpentry Limited | Construction | 2018 |
| 32B Ltd | Professional & scientific | 2020 |
| 39 Property Management Company Limited | Households | 1989 |
| 4YOUTH (South West) | Education | 2011 |
| 66 Lowbourne Management Company Limited | Households | 2007 |
| A & D Home Improvements Ltd | Construction | 2023 |
| A & Y Construct Limited | Construction | 2015 |
| A J Pearson Contractors Limited | Other services | 2009 |
| A W Services (SW) Ltd | Administrative & support | 2017 |
| A-Z Consultants Ltd | Administrative & support | 2008 |
| A.Daley Plumbing & Heating Ltd | Construction | 2025 |
| A.J.M. Enclosing Limited | Administrative & support | 2004 |
| A.L. King (Holdings) Limited | Financial services | 2019 |
| A.L. King Roofing Merchants Limited | Construction | 2019 |
| A1 Window Cleaning Services Limited | Other services | 2002 |
| Aaaj Assets Limited | Transport & logistics | 2023 |
| ABC Online Courses Limited | Information & communication | 2019 |
| Absolute Power Tools Ltd | Wholesale & retail | 2008 |
| Achievio Ltd | Education | 2023 |
| Activate Client Management Limited | Professional & scientific | 2020 |
| Activate Marketing Ltd | Professional & scientific | 2025 |
| Activate Mays Media Ltd | Information & communication | 2023 |
| Activate Sport and Leisure Ltd | Financial services | 2024 |
| Activate Wear Ltd | Manufacturing | 2025 |
| Active Accounting Solutions Limited | Professional & scientific | 2018 |
| Active Holiday Camps Limited | Education | 2013 |
| Activeed Group Ltd | Financial services | 2025 |
| Adeena Retail Limited | Wholesale & retail | 2024 |
| Adzoola Ltd | Information & communication | 2014 |
| Aerokem Limited | Wholesale & retail | 2011 |
| Agesan Limited | Wholesale & retail | 2019 |
| Airey Consultancy Services Limited | Professional & scientific | 1998 |
| Ajate Limited | Wholesale & retail | 2024 |
| AL Afnoon Ltd | Wholesale & retail | 2025 |
| Alan Joy Windows Ltd | Construction | 1999 |
| Alfred's Drive Management Company Limited | Households | 2022 |
| ALIGN360 Consulting Limited | Professional & scientific | 2025 |
| Allium FP Limited | Financial services | 2025 |
| Alpha ROD Ltd | Construction | 2010 |
| Alpine Villa Care Home Ltd | Health & social care | 2010 |
| Alteration Market Ltd | Wholesale & retail | 2025 |
| Alternative Piling Solutions Limited | Construction | 2018 |
| Always Sparkling Cleaning Services Ltd | Administrative & support | 2023 |
| Amageo Limited | Professional & scientific | 2011 |
| Amanda Jayne Estate Agents Limited | Real estate | 2020 |
| AMS 2729 Limited | Manufacturing | 2006 |
| Anchorgrove Limited | Real estate | 1973 |
| Andrew Underwood Commercial Sweeping Limited | Administrative & support | 2015 |
| Andy&Ana Ltd | Wholesale & retail | 2021 |
| Anthony Dear Landscapes Ltd | Administrative & support | 2021 |
| Applewood Designs Limited | Construction | 2004 |
| APT Property Rentals Ltd | Real estate | 2019 |
| AQ Partners Limited | Professional & scientific | 2024 |
| Aquatec Heating & Plumbing Services Ltd | Construction | 2023 |
| AR Taxi Ltd | Transport & logistics | 2024 |
| Arabuko Bar Ltd | Hospitality | 2019 |
| Archwings Consulting Ltd | Professional & scientific | 2026 |
| Archwings UK Limited | Professional & scientific | 2022 |
| Ardent Construction SW Ltd. | Construction | 2015 |
| Ardent Homes SW Ltd. | Construction | 2022 |
| Ardgour Resources Ltd | Professional & scientific | 2011 |
| Armadillo Developments Ltd | Construction | 2025 |
| Armadillo Groundworks Ltd | Construction | 2022 |
| Arrow Radiators (Melksham) Limited | Manufacturing | 2004 |
| Arziga Ltd | Professional & scientific | 2011 |
| Ashton Mill Services Limited | Water & waste | 2005 |
| Aspersa Group Ltd | Hospitality | 2023 |
| Asset Finance & Leasing Limited | Financial services | 2009 |
| AT XV Ltd | Other services | 2026 |
| Ateliervfx Ltd | Information & communication | 2021 |
| Athletic Drive Ltd | Wholesale & retail | 2025 |
| Atlantis Roofing Services Ltd | Construction | 2026 |
| Atworth Arboriculture Ltd | Administrative & support | 2012 |
| Atworth Nine Limited | Financial services | 2020 |
| Audibel Limited | Information & communication | 2020 |
| Audio Visual Solutions Ltd | Construction | 2021 |
| Aurora Homes SW Ltd | Construction | 2025 |
| Automated Doorways Limited | Construction | 2016 |
| Automotive Solutions (UK) Limited | Wholesale & retail | 2007 |
| Autonomy Care Group Ltd | Professional & scientific | 1997 |
| Autonomy Care Limited | Health & social care | 2008 |
| Autonomy Life Ltd | Health & social care | 2000 |
| Autonomy Plus Limited | Health & social care | 2017 |
| Avad & Sons Limited | Wholesale & retail | 2022 |
| Avad Limited | Wholesale & retail | 2022 |
| Avon Air Services Limited | Extraterritorial | 2001 |
| Avon Polymer Products Limited | Manufacturing | 1918 |
| Avon Protection Holdings Limited | Professional & scientific | 1926 |
| Avon Protection Limited | Extraterritorial | 1992 |
| Avon Protection UK Limited | Extraterritorial | 1950 |
| Avon Rubber Pension Trust Limited | Other services | 1980 |
| Avon Technologies PLC | Manufacturing | 1890 |
| Avon Valley Cars Ltd | Wholesale & retail | 2025 |
| Avonside Engineering Limited | Professional & scientific | 2013 |