| 108 Recordings Ltd | Wholesale & retail | 2024 |
| 120MR Management Co Ltd | Households | 2022 |
| 16/17 Welton Road Management Company Limited | Extraterritorial | 2000 |
| 17/18 Catherine Hill Management (Frome) Limited | Households | 1999 |
| 20 TEN Steel Ltd | Construction | 2017 |
| 22 Vicarage Street Management Limited | Households | 2002 |
| 23 Bath ST Ltd | Arts & recreation | 2018 |
| 23 KS Frome Management Ltd | Households | 2016 |
| 2ND Chance Petting Farm Ltd | Agriculture & fishing | 2021 |
| 3 the Halve Management Company Limited | Households | 1999 |
| 30 Catherine Street Management Company Limited | Households | 1990 |
| 30-32 Knight's Park Limited | Households | 1984 |
| 31 Keyford Frome Management Company Limited | Households | 2010 |
| 34 Christchurch Street East Management Company Limited | Real estate | 2007 |
| 34 Musgrove Road Limited | Households | 2001 |
| 34/36 West END (Westbury) Management Company Limited | Households | 1988 |
| 3D Create Limited | Arts & recreation | 2007 |
| 4 Walls Live Limited | Other services | 2023 |
| 40 - 42 Sydenham Avenue RTM Company Limited | Households | 2025 |
| 44 Catherine Street, Frome Limited | Households | 1992 |
| 45 Warminster Road (Westbury) Limited | Households | 2022 |
| 53 Catherine Street (Frome) Management Limited | Hospitality | 1998 |
| 54 Keyford Limited | Households | 2022 |
| 55 West Ltd | Construction | 2024 |
| 56 Warminster Road Management Limited | Households | 1995 |
| 59 Catherine Street Management Company Limited | Households | 2017 |
| 5A Property Limited | Real estate | 2020 |
| 5A Retail Limited | Professional & scientific | 2010 |
| 6 Bath Street Frome (Management) Limited | Real estate | 1996 |
| 7 Keyford Limited | Hospitality | 2004 |
| 7 Pillars Consulting Limited | Professional & scientific | 2014 |
| 7 Pillars Group Ltd | Financial services | 2025 |
| 9 Stony Street Limited | Households | 2019 |
| A & J Baker Carpentry Ltd | Construction | 2017 |
| A & S Smith Consultancy Ltd | Professional & scientific | 2024 |
| A &R Contracting Ltd | Construction | 2010 |
| A and J Land Management Ltd | Construction | 2018 |
| A and J Waste Services Ltd | Water & waste | 2017 |
| A B Architectural Design Limited | Professional & scientific | 2006 |
| A Class Products Ltd | Manufacturing | 2013 |
| A D Barnes and SON Limited | Transport & logistics | 2019 |
| A D Jones Roofing Limited | Construction | 2010 |
| A Day on the Farm Ltd | Arts & recreation | 2020 |
| A Huevo! Ltd | Hospitality | 2022 |
| A J & R C Brown Limited | Administrative & support | 2014 |
| A K Sanders Properties Ltd | Extraterritorial | 2016 |
| A L B Studio Ltd | Real estate | 2022 |
| A M Precision Ltd | Manufacturing | 2015 |
| A P Brock Solutions Ltd. | Wholesale & retail | 2014 |
| A S Blakemore Ltd | Wholesale & retail | 2010 |
| A T Pierce Services Ltd | Administrative & support | 2018 |
| A W Cray Limited | Construction | 2003 |
| A&A Airbnb and Lettings Limited | Real estate | 2021 |
| A&E Services (South West) Limited | Other services | 2017 |
| A.J. Brunt Limited | Transport & logistics | 1988 |
| A361 Limited | Hospitality | 2019 |
| AA Fabrications (South West) Limited | Manufacturing | 2013 |
| Abbey Ales Limited | Manufacturing | 1997 |
| Abbey Inns (Assembly) Limited | Hospitality | 2009 |
| Abbey Inns (Bath) Limited | Hospitality | 2006 |
| Abbey Inns (Bell) Ltd | Hospitality | 2025 |
| Abbey Inns (HOP Pole) Ltd | Hospitality | 2024 |
| Abbey Shop Limited | Wholesale & retail | 2021 |
| ABC European Food Ltd | Wholesale & retail | 2015 |
| ABI Mcgillivray Architecture Ltd | Professional & scientific | 2021 |
| Abora Ltd | Wholesale & retail | 2024 |
| Absolute Solvents Limited | Water & waste | 2000 |
| AC & JM Jones Consulting Ltd | Information & communication | 2011 |
| Academy for Yoga Training Limited | Education | 2017 |
| Accessory LAB Limited | Information & communication | 2007 |
| Achieve and Nurture Ltd | Education | 2025 |
| Acker Fields Ltd | Agriculture & fishing | 2023 |
| Acme Flooring and Paving Limited | Financial services | 2012 |
| Acor Properties Ltd | Real estate | 2018 |
| Acornsilver Limited | Construction | 2008 |
| Acre & Holt Ltd | Manufacturing | 2005 |
| Action on Disability and Development | Health & social care | 1986 |
| Actors in Business Ltd | Arts & recreation | 2015 |
| Acu:East Ltd | Health & social care | 2017 |
| Acuity Estates Ltd | Administrative & support | 2011 |
| AD Carpentry & Developments Ltd | Construction | 2024 |
| AD GAD Ltd | Health & social care | 2020 |
| AD Pro Energy Ltd | Manufacturing | 2023 |
| Adam Spring Ltd | Information & communication | 2018 |
| Addington Properties Limited | Real estate | 1996 |
| Advanced Solutions Southwest Limited | Construction | 2022 |
| Advanced Woodland Services Ltd | Agriculture & fishing | 2002 |
| Advanced Workshop Solutions Limited | Wholesale & retail | 2020 |
| Aether Vault Collectables Ltd | Wholesale & retail | 2026 |
| Affinity Element Limited | Professional & scientific | 2023 |
| Agentai Ltd | Information & communication | 2025 |
| Agncy Ltd | Administrative & support | 2020 |
| Ahlan Centre Ltd | Health & social care | 2008 |
| AHT UK Investments Limited | Real estate | 2019 |
| AJC Drainage Ltd | Water & waste | 2002 |
| AJWAKEFIELD54@ Ltd | Construction | 2025 |
| Albraconstruction Ltd | Construction | 2025 |
| Alec Hughes Design Ltd | Information & communication | 2023 |
| Alex Hill Electrical Limited | Energy | 2012 |
| Alfreds Bread Limited | Manufacturing | 2019 |