| Anglo Home Care Services Ltd | Public administration | 2021 |
| Anglo Support and Housing Ltd | Health & social care | 2017 |
| Anglo Supported Living Services Limited | Public administration | 2020 |
| Anglo-American Exploration Co. Limited | Mining & quarrying | 1980 |
| Anglo-Asia Property & Investment Limited | Construction | 1990 |
| Angorycorp Limited | Information & communication | 2026 |
| Angraag Marketing Ltd | Professional & scientific | 2025 |
| Angry Panda Limited | Information & communication | 2012 |
| Angrycrab Ltd | Administrative & support | 2012 |
| Angus Design Limited | Professional & scientific | 2019 |
| Angus Electrical (Bristol) Limited | Construction | 2020 |
| Angus Macdonald Ltd | Extraterritorial | 2016 |
| Angus Meek Partnership Limited | Professional & scientific | 1986 |
| Anibotics Ltd. | Wholesale & retail | 2021 |
| Anika Therapeutics Limited | Administrative & support | 2019 |
| Anikita Technologies Limited | Professional & scientific | 2021 |
| Anima Hub Ltd | Information & communication | 2022 |
| Anima Talk Ltd | Health & social care | 2019 |
| Anima Techne Ltd | Professional & scientific | 2025 |
| Animal House Vets Limited | Extraterritorial | 2018 |
| Animal Property Partners Ltd | Real estate | 2025 |
| Animal Rehab Training Clinic Ltd | Education | 2025 |
| Animals at Home (Bristol West) Limited | Professional & scientific | 2018 |
| Animated Intelligence Ltd | Professional & scientific | 2025 |
| Animates Veterinary Clinic Limited | Professional & scientific | 2005 |
| Animatik Ltd | Information & communication | 2015 |
| Animeleague Ltd | Administrative & support | 2014 |
| Animist Ltd | Information & communication | 2019 |
| Animograf Ltd | Extraterritorial | 2022 |
| Animotion Technologies Ltd | Information & communication | 2025 |
| Animus Social Ltd | Professional & scientific | 2024 |
| Anish & Anikha Property Limited | Real estate | 2022 |
| Anish and Anikha Retail Ltd | Wholesale & retail | 2025 |
| Aniso Structures Ltd | Professional & scientific | 2025 |
| Anita Shargall Media Limited | Information & communication | 2019 |
| Aniwell Ltd | Extraterritorial | 2010 |
| Aniwell Veterinary Clinic Ltd | Extraterritorial | 2010 |
| Aniwell Veterinary Company Limited | Extraterritorial | 2004 |
| Anjosa Textile Studios Limited | Wholesale & retail | 2001 |
| Ankrumah Locums Ltd | Health & social care | 2014 |
| Anmatt Health and Care Solutions Ltd | Professional & scientific | 2026 |
| Ann's Blissful Weddings Ltd | Administrative & support | 2026 |
| Ann's Nails & Spa Ltd | Other services | 2026 |
| Anna Barnett Cooks Limited | Arts & recreation | 2013 |
| Anna Cake Couture Ltd | Manufacturing | 2014 |
| Anna J Trans Limited | Transport & logistics | 2016 |
| Anna Jacobs Products Limited | Administrative & support | 2017 |
| Anna Mrukowska Ltd | Real estate | 2022 |
| Anna Warburton Hair Ltd | Other services | 2024 |
| Anna's Watches Ltd | Wholesale & retail | 2023 |
| Annalex Care Ltd | Health & social care | 2013 |
| Annaluto Communications Limited | Information & communication | 2017 |
| Annaoke Karaoke & Disco Company Ltd | Other services | 2026 |
| Annapurna Private Limited | Hospitality | 2018 |
| Anne's House Limited | Health & social care | 2020 |
| Annette Adams School of Dancing Limited | Education | 2024 |
| Annette Livingstone and Associates Limited | Professional & scientific | 1999 |
| Annette Livingstone Costs Lawyers Limited | Professional & scientific | 2004 |
| Annexus Training Limited | Other services | 2024 |
| Anni Flooring and Cleaning Limited | Construction | 2014 |
| Annie Bailey Property Limited | Real estate | 2020 |
| Annie Marchant Limited | Professional & scientific | 2017 |
| Annliza Ltd | Public administration | 2022 |
| Annwn Studio Limited | Arts & recreation | 2023 |
| Anode Project Solutions Ltd | Professional & scientific | 2023 |
| Anomify Limited | Information & communication | 2024 |
| Anorak Cat Web Design Ltd | Information & communication | 2016 |
| Another Brewery Limited | Manufacturing | 2015 |
| Another Level Developments Limited | Real estate | 2018 |
| Another Level Fitness Group Limited | Arts & recreation | 2025 |
| Another Level Projects Limited | Construction | 2021 |
| Another Lifestyle Limited | Real estate | 2014 |
| Another Time Around Bristol Limited | Wholesale & retail | 2021 |
| Another Way Associates Ltd | Professional & scientific | 2013 |
| Anperadeda Trans Speed Ltd | Transport & logistics | 2022 |
| ANS Precision Engineering Ltd | Manufacturing | 2008 |
| Ansary Restaurant Limited | Hospitality | 2021 |
| Ansell & Wakefield Engineering Ltd. | Manufacturing | 1997 |
| Ansol Limited | Information & communication | 2018 |
| Anstey Electrical Limited | Construction | 2010 |
| Anstey Ventures Limited | Financial services | 2025 |
| Ansteys Court Management Company Limited | Households | 2005 |
| ANT Glynn Ltd | Professional & scientific | 2026 |
| Ant's Enterprises Limited | Wholesale & retail | 2022 |
| Anta Band Ltd | Arts & recreation | 2024 |
| Anta Homes Ltd | Real estate | 2024 |
| Antagonist Ltd. | Information & communication | 2011 |
| Antandtech Ltd | Information & communication | 2013 |
| Antarctica Guide Limited | Administrative & support | 2019 |
| Antaris UK Limited | Real estate | 2023 |
| Antbec Car Rental Ltd | Administrative & support | 2019 |
| Antbec Services Limited | Information & communication | 2014 |
| Antec Electrical Limited | Construction | 2006 |
| Anter Properties Limited | Real estate | 1957 |
| Antevistas Limited | Administrative & support | 2016 |
| Anthony Brookes Surveys Limited | Professional & scientific | 2000 |
| Anthony Buckley & Company Limited | Administrative & support | 1990 |
| Anthony James Hair Design Limited | Other services | 2002 |
| Anthony Marks Resourcing Ltd | Administrative & support | 2019 |
| Anthony Michael Meyer Ltd | Professional & scientific | 2024 |