| 10 High Street Glastonbury Ltd | Financial services | 2026 |
| 3DATA Ltd | Information & communication | 2020 |
| 40 Watt Electrical Limited | Construction | 2022 |
| 46 and 48 Green Lane Avenue (Management Company) Limited | Households | 2006 |
| 8POINT9 Limited | Administrative & support | 2022 |
| A Lester Property Limited | Construction | 2018 |
| A1 Solutions Southwest Ltd | Construction | 2024 |
| Aardman Associates Limited | Professional & scientific | 2004 |
| Abattia Group Limited | Information & communication | 2000 |
| Abbey Scaffolding (Glastonbury) Limited | Construction | 2000 |
| Abbot's Way Ltd | Education | 2020 |
| Abbots Leigh Limited | Hospitality | 2019 |
| ABC Executive Travel Ltd | Other services | 2018 |
| ABG LAB UK Limited | Manufacturing | 2024 |
| Abundant Avalon Ltd | Hospitality | 2021 |
| Abundiflora Limited | Wholesale & retail | 2021 |
| Acorn Project Management Limited | Professional & scientific | 2008 |
| Active Line Therapy Ltd | Manufacturing | 2024 |
| AD Generator Rentals Ltd | Administrative & support | 2021 |
| ADM Project Consultants Ltd | Professional & scientific | 2021 |
| ADM Project Management Training Ltd | Professional & scientific | 2021 |
| Advanced Vehicle Solutions Limited | Wholesale & retail | 2004 |
| Affordable Prestige Cars Limited | Wholesale & retail | 2019 |
| Affordable Prestige Developments Ltd | Transport & logistics | 2024 |
| Agroeco Consulting Limited | Professional & scientific | 2024 |
| Agrolo Land Futures Ltd | Professional & scientific | 2021 |
| Ailnoth Consultants Limited | Information & communication | 2007 |
| Aklg Property Ltd | Other services | 2022 |
| Alba Ryder Management Limited | Administrative & support | 1997 |
| Alchemy Services Limited | Construction | 2006 |
| Alfoxton Woodland Enterprises Ltd | Agriculture & fishing | 2022 |
| ALL Ears and Tales Ltd | Agriculture & fishing | 2025 |
| Amba Clothing Limited | Wholesale & retail | 2014 |
| Amour Natural Ltd | Wholesale & retail | 2020 |
| Anderson Accounting & Documentation Ltd | Professional & scientific | 2010 |
| Andrew Coleman Limited | Professional & scientific | 2010 |
| Ankhstone Properties Ltd | Real estate | 2025 |
| Anseres Place Management Limited | Households | 2003 |
| Apexmentor Ltd | Professional & scientific | 2026 |
| Appleisland Limited | Professional & scientific | 2014 |
| April Construct Limited | Construction | 2016 |
| APS Pool Contracting Limited | Construction | 2009 |
| APS Pools Ltd | Arts & recreation | 2026 |
| Aqua Power Group Ltd | Wholesale & retail | 2019 |
| Arabian Nubian Mining Limited | Mining & quarrying | 2021 |
| Arabian Nubian Resources Ltd | Mining & quarrying | 2020 |
| Archway Securities Limited | Information & communication | 2023 |
| Arnie Levics Limited | Wholesale & retail | 1975 |
| Arthurs Court Management Company Limited | Households | 2003 |
| Artificers Unhindered Limited | Wholesale & retail | 2003 |
| Asena Group Limited | Wholesale & retail | 2025 |
| Ashmore Property Co. Ltd | Real estate | 2026 |
| Atlas Tower Group Holdings Limited | Financial services | 2019 |
| Atlas Tower Group Limited | Information & communication | 2018 |
| Attic Theatre Limited | Arts & recreation | 1974 |
| Audiology-Online Limited | Health & social care | 2011 |
| Avalon Alchemy Ltd | Wholesale & retail | 2025 |
| Avalon Car Care Ltd | Wholesale & retail | 2022 |
| Avalon Carpets & Flooring Ltd | Wholesale & retail | 2026 |
| Avalon Company Services Ltd | Professional & scientific | 2019 |
| Avalon Connections Ltd | Administrative & support | 2025 |
| Avalon Fibres Ltd | Manufacturing | 2026 |
| Avalon Mews High Street Limited | Households | 2004 |
| Avalon Mews Limited | Households | 2004 |
| Avalon Motor Co Holdings Limited | Financial services | 2024 |
| Avalon Motor Co Limited | Wholesale & retail | 1987 |
| Avalon Motor Co South West Limited | Extraterritorial | 2020 |
| Avalon Motor Services Limited | Real estate | 1988 |
| Avalon Plastics Limited | Manufacturing | 2003 |
| Avalon Roundhouse Collective CIC | Public administration | 2025 |
| Avalon Tyre Services Ltd | Wholesale & retail | 2006 |
| Avalonia Ltd | Information & communication | 2021 |
| Avalons Hive Ltd | Manufacturing | 2025 |
| Avaluna Alchemy Ltd | Manufacturing | 2025 |
| Avps Express Ltd | Construction | 2017 |
| Ayesha Kalaji Ltd | Hospitality | 2023 |
| B&R Hospitality Ltd | Hospitality | 2024 |
| Baker Trenchard Limited | Construction | 2006 |
| Baltonsborough (Management Company) Limited | Households | 2022 |
| Bancroft Carpets Limited | Wholesale & retail | 2011 |
| Barrie Designs Ltd | Professional & scientific | 2020 |
| Bay Systems Limited | Professional & scientific | 1990 |
| BE Encouraged Wellness Limited | Health & social care | 2020 |
| Beckery Island Regeneration Trust | Construction | 2005 |
| Beckery Properties Limited | Real estate | 2004 |
| Beechleaf Consulting Limited | Professional & scientific | 2012 |
| Bell Laboratories UK Limited | Wholesale & retail | 2018 |
| Benchmark Electrical Design and Consultancy Ltd | Professional & scientific | 2021 |
| Benedict Street (Glastonbury) Management Company Limited | Real estate | 2005 |
| Benwood Properties South West Ltd | Real estate | 2026 |
| Bespoke Textiles Limited | Other services | 2012 |
| Biggerhouse Film CIC | Education | 2021 |
| Bilsborough Limited | Administrative & support | 2000 |
| Bisbe Limited | Information & communication | 2015 |
| Bisgrove Construction Limited | Construction | 2016 |
| Black OX Construction Limited | Construction | 2012 |
| Blackwater Trustees Limited | Professional & scientific | 2001 |
| Blatchford Brown Limited | Administrative & support | 2011 |
| Blousey Brown Limited | Extraterritorial | 2010 |
| Blue Cedar Print Works Ltd | Manufacturing | 2013 |