| 121 Football Development Ltd | Education | 2025 |
| 14 Richmond Road Exeter Management Company Limited | Households | 1995 |
| 18 Cathedral Yard Management Company Limited | Households | 2017 |
| 1ST Choice Property Ltd | Households | 2020 |
| 3L Developments Ltd | Real estate | 2016 |
| 4SITE Training Ltd | Education | 2026 |
| 58LEASE Ltd | Households | 2020 |
| A & R Brown Limited | Agriculture & fishing | 2018 |
| A & R Brown Property Ltd | Real estate | 2021 |
| A Daughtry Plumbing & Heating Ltd | Construction | 2017 |
| A E M E Limited | Education | 1997 |
| A J P Creative Ltd | Arts & recreation | 2019 |
| A R Boland Limited | Construction | 2003 |
| A S Builders (Honiton) Limited | Construction | 2016 |
| A&C Dent Ltd | Health & social care | 2019 |
| A.L.C.H.Partnership | | 1995 |
| A.L.S. Landscaping & Fencing Limited | Administrative & support | 2011 |
| A.W. Growth Solutions Ltd | Professional & scientific | 2026 |
| A1 Accounts & Taxation Limited | Professional & scientific | 2023 |
| A1 Carpentry and Building Solutions Ltd | Construction | 2015 |
| A1 Print & Stitch Limited | Administrative & support | 2012 |
| A2B Swim School Ltd | Education | 2023 |
| Above Build Limited | Other services | 2020 |
| Absolute Care South West Ltd | Health & social care | 2011 |
| Actron Ltd | Manufacturing | 1974 |
| Adey Commissioning Services Ltd | Energy | 2024 |
| Adoble Limited | Professional & scientific | 2022 |
| Adrenalin Leisure Limited | Arts & recreation | 2016 |
| Adrian Cave Limited | Wholesale & retail | 2002 |
| AE4 Ltd | Administrative & support | 2024 |
| AEP Compressed Air Technologies Limited | Manufacturing | 1975 |
| Aerovoice Ltd | Professional & scientific | 2018 |
| AES South West Ltd | Construction | 2023 |
| AG Solutions Plymouth Ltd | Health & social care | 2022 |
| AGY Cars Limited | Wholesale & retail | 2023 |
| Air Conditioning & Electrical Services Limited | Construction | 2002 |
| Air Westward Limited | Arts & recreation | 1982 |
| Air-Conditioning Direct Current Ltd | Professional & scientific | 2025 |
| Airfield Classic Cars Limited | Wholesale & retail | 2018 |
| AJP Online Ltd | Wholesale & retail | 2026 |
| AJP Store Ltd | Wholesale & retail | 2021 |
| Alert-Scan Security Systems Ltd | Administrative & support | 2015 |
| Alexander Paul Group Ltd | Wholesale & retail | 2002 |
| ALL Areas HR Limited | Administrative & support | 2020 |
| ALL in Run Club Ltd | Arts & recreation | 2025 |
| Allan Bright & SON Chris SAW Mills & Timber Merchant Limited | Agriculture & fishing | 2006 |
| Allsworth Property Limited | Real estate | 2019 |
| Alpha Lifting Services Limited | Administrative & support | 2002 |
| Alpha-Active Ltd | Manufacturing | 2001 |
| Alpine SKI Works Ltd | Wholesale & retail | 2024 |
| Ambo Studios Ltd | Wholesale & retail | 2019 |
| Amery Scott Management Limited | Real estate | 1989 |
| AMS Services (SW) Ltd | Transport & logistics | 2026 |
| Amuse Peruse Limited | Wholesale & retail | 2026 |
| Anchored in Faith Limited | Other services | 2024 |
| Angels Daycare Ltd | Education | 2012 |
| Another Coffee Ltd | Wholesale & retail | 1999 |
| Anstim Limited | Real estate | 2010 |
| Apexjet Ltd | Other services | 2026 |
| APK Plastering Ltd | Construction | 2013 |
| AR Web Design Ltd | Information & communication | 2020 |
| Archetype Trading Limited | Wholesale & retail | 2011 |
| Argo Mobile Repair Team (UK) Ltd. | Professional & scientific | 2018 |
| Art 45 Ltd | Wholesale & retail | 2004 |
| Arthur and Martha (Devon) Ltd | Wholesale & retail | 2012 |
| Arthur Bryan Limited | Real estate | 2023 |
| Ashcombe Sporting Limited | Arts & recreation | 2026 |
| Ashcott Equestrian Limited | Manufacturing | 2004 |
| Ashfield Group Holdings Ltd | Real estate | 2017 |
| Ashfield Products Ltd. | Manufacturing | 2008 |
| Ashgrove House Care Home Limited | Health & social care | 2025 |
| Ashwood P.B Limited | Administrative & support | 2019 |
| Aston UK Holdings Ltd | Financial services | 2022 |
| Astute Films Limited | Information & communication | 2011 |
| Atam Hospitality Ltd | Hospitality | 2025 |
| Atanasov Dent Ltd | Health & social care | 2015 |
| Atdirect Ltd | Information & communication | 2011 |
| Autowhites Limited | Wholesale & retail | 2003 |
| Avalonian Investments Ltd | Real estate | 2021 |
| Avatter Ltd | Financial services | 2024 |
| Avestin Limited | Manufacturing | 2016 |
| AXE Vale Netball Community CIC | Arts & recreation | 2024 |
| Axithorn Limited | Information & communication | 2024 |
| Axminster Excavators Limited | Construction | 1993 |
| Axminster MOT Centre Limited | Wholesale & retail | 2010 |
| Axminster MOT Ltd | Wholesale & retail | 2020 |
| Azurak Ltd | Wholesale & retail | 2022 |
| B! Health and Fitness Ltd | Arts & recreation | 2014 |
| B.G. Middleton (Developments) Limited | Real estate | 1991 |
| Baked&Loaded Ltd | Hospitality | 2026 |
| Balfour Management Company Limited | Households | 1973 |
| Barnes Property Maintenance & Development Ltd | Other services | 2025 |
| Barrett Partnership Limited | Real estate | 1951 |
| Bartelings Associates Limited | Professional & scientific | 2015 |
| Barton Aviation Limited | Transport & logistics | 1990 |
| Bastion Safety Group (UK) Ltd | Professional & scientific | 2026 |
| Bay House Limited | Households | 1987 |
| Bcnx Honiton Ltd | Hospitality | 2021 |
| Beacon Resources Limited | Mining & quarrying | 1996 |
| Beckham Enterprises Ltd | Administrative & support | 2017 |