| 1 & 2 Vicarage Mews (Warminster) Management Company Limited | Households | 2023 |
| 13/15 Portway Warminster (Management) Company Limited | Households | 1992 |
| 17-20 the Retreat Property Management Limited | Households | 2025 |
| 23 Henrietta Street (Bath) Management Company Limited | Households | 1986 |
| 24 Westbury Road Warminster Management Company Limited | Households | 2002 |
| 2SWINGS Ltd | Wholesale & retail | 2022 |
| 3 & 4 North Parade Frome Management Limited | Real estate | 2015 |
| 3APM Ltd | Professional & scientific | 2018 |
| 3RD Wave Media Ltd. | Wholesale & retail | 2011 |
| 46 by Fourtysix Limited | Professional & scientific | 2025 |
| 47 Valletort Road Management Company Limited | Households | 2016 |
| 7 Engineering Consultancy Limited | Professional & scientific | 2010 |
| 87 Archel Ltd. | Real estate | 1997 |
| 992 Consulting Ltd | Professional & scientific | 2022 |
| A R Mcleod Consulting Limited | Administrative & support | 2013 |
| A-2-Z Resilience Ltd | Education | 2013 |
| A.C.T.S Music Lessons Ltd | Arts & recreation | 2022 |
| A.I.D Training & Operations Limited | Education | 2006 |
| A.J.P. Aviation Ltd | Manufacturing | 2008 |
| AB Wealth Management Limited | Professional & scientific | 2019 |
| ABB Master Locksmiths Ltd | Administrative & support | 2026 |
| Abig Limited | Real estate | 2024 |
| Absolute Challenges Ltd | Hospitality | 2010 |
| Absolute Lettings Ltd | Real estate | 2020 |
| Academy Collaborative Services Limited | Education | 2014 |
| Accushoot Ltd | Professional & scientific | 2025 |
| Acorn Education Trust | Education | 2011 |
| Acos Medical Limited | Education | 2016 |
| Acreman Forestry Ltd | Agriculture & fishing | 2013 |
| Acres Supply Limited | Wholesale & retail | 2010 |
| Adstatus Limited | Public administration | 2015 |
| Advanced British Instruments Ltd | Professional & scientific | 2016 |
| Advanced Treasury Technologies Limited | Information & communication | 1992 |
| Advantage Equine Ltd | Wholesale & retail | 2023 |
| Advantage Simulation Ltd | Professional & scientific | 2025 |
| Aeolius Limited | Professional & scientific | 2026 |
| Aevitus Care Services Ltd | Health & social care | 2016 |
| Affinity Employment & Disability Management & Consultancy Ltd | Professional & scientific | 2020 |
| AG14SOLUTIONS Limited | Real estate | 2018 |
| Agentic AI Integrations Limited | Information & communication | 2026 |
| Agri Giveaways Ltd | Administrative & support | 2019 |
| Agri Prestige Ltd | Wholesale & retail | 2022 |
| Agricultural Grant Solutions Limited | Other services | 2011 |
| Ahmad Super Hand Car Wash Ltd | Administrative & support | 2025 |
| Airey & GUY Limited | Construction | 2014 |
| Airtech Energy Ltd | Construction | 2026 |
| Aku-Bookstop Ltd | Wholesale & retail | 2019 |
| Alans Holdings Limited | Real estate | 2026 |
| ALB Fabrications Limited | Manufacturing | 2026 |
| Albidus Limited | Information & communication | 2014 |
| Alex Strasman Design Ltd | Professional & scientific | 2014 |
| Alexandra Channer Ltd | Professional & scientific | 2018 |
| Alfrema Ltd | Professional & scientific | 2015 |
| Alice Irwin Design Limited | Wholesale & retail | 2018 |
| Alina Holdings PLC | Real estate | 2004 |
| ALL About Hair Ltd | Other services | 2018 |
| ALLEVI8 Limited | Health & social care | 2009 |
| Allforum.Com Limited | Information & communication | 2000 |
| Allmightyyou Consulting Limited | Other services | 2010 |
| Allshop Ltd | Wholesale & retail | 2015 |
| Alpha Nine Training & Defence Ltd | Professional & scientific | 2022 |
| Alpha Tiger Limited | Professional & scientific | 2013 |
| ALT Design Partnership Limited | Professional & scientific | 2017 |
| Amcas Training Ltd | Education | 2016 |
| Amore Dance and Pilates Limited | Arts & recreation | 2025 |
| Amporah Ltd | Professional & scientific | 2025 |
| Amtec Training Limited | Education | 2009 |
| Amulet Residential Limited | Other services | 2018 |
| Anderson Accounting Limited | Professional & scientific | 2002 |
| Andys Grass and Garden Care Ltd | Administrative & support | 2012 |
| Andyscaff Consultancy Ltd | Construction | 2026 |
| Angel Inn Upton Limited | Hospitality | 2018 |
| Angiodesign (UK) Ltd | Manufacturing | 2001 |
| Ansoroute Education Limited | Information & communication | 2025 |
| Anti-Vibration Methods (Rubber) Co. Limited | Wholesale & retail | 1988 |
| Anton Films Limited | Arts & recreation | 1974 |
| Anzo Tech Ltd | Information & communication | 2012 |
| Anzo Training Ltd | Education | 2019 |
| Apazidou Limited | Real estate | 2025 |
| Apex Data Insights Limited | Information & communication | 2025 |
| Appadiem Ltd | Information & communication | 2020 |
| Apptel Limited | Information & communication | 2016 |
| APR Imports Ltd | Professional & scientific | 2024 |
| Arboretum Ltd | Manufacturing | 2023 |
| Arco England Limited | Manufacturing | 2008 |
| Arcsal.Com Limited | Wholesale & retail | 2000 |
| Armera Limited | Wholesale & retail | 2020 |
| Armoury Advancements Ltd | Wholesale & retail | 2024 |
| Aromaglow Limited | Wholesale & retail | 2018 |
| ARROW46 Services Limited | Professional & scientific | 2021 |
| Artiyo Ltd | Information & communication | 2018 |
| Artmet Limited | Wholesale & retail | 2024 |
| Artphil Ltd | Wholesale & retail | 2023 |
| Arya Catering Ltd | Hospitality | 2025 |
| Ascension Group Ltd | Administrative & support | 2019 |
| Ascension Tech Ltd | Information & communication | 2016 |
| Asgard Climbing Ltd | Professional & scientific | 2026 |
| Ashmere House Company Limited | Households | 2019 |
| Asset Tagged Limited | Information & communication | 2024 |
| Astwood Bank Management Company Limited | Administrative & support | 2006 |