| Ashburton Facilities Ltd | Real estate | 2017 |
| Ashburton Food and Drink Festival CIC | Hospitality | 2024 |
| Ashburton Group Limited | Professional & scientific | 2009 |
| Ashburton Lodges Limited | Hospitality | 2017 |
| Ashburton Motor Works Limited | Wholesale & retail | 1999 |
| Ashburton Physio Ltd | Health & social care | 2014 |
| Ashburton Taxis Limited | Transport & logistics | 2002 |
| Ashburton Tyres Limited | Wholesale & retail | 2009 |
| Ashcom Holdings Limited | Real estate | 2008 |
| Asher Care Ltd | Health & social care | 2013 |
| Ashes Registry Limited | Other services | 2022 |
| Ashgrove Agency Limited | Extraterritorial | 2001 |
| Ashland Nationwide Ltd | Education | 2001 |
| Ashman SW Ltd | Real estate | 2021 |
| Ashtons Properties Ltd | Real estate | 2021 |
| ASK Stuart Limited | Other services | 2017 |
| Aspect Arboricultural Training Ltd | Education | 2021 |
| Aspect Tree Consultancy Limited | Professional & scientific | 2008 |
| Aspire Developments (South West) Limited | Construction | 2024 |
| Assero Limited | Information & communication | 2003 |
| Asset Data Solutions Ltd | Information & communication | 2024 |
| Assured Direct Homeloans Ltd | Financial services | 2006 |
| Astley Media Limited | Extraterritorial | 2022 |
| Astra Fixing & Ironmongery Supplies Limited | Wholesale & retail | 2016 |
| Astra Property Development Ltd | Construction | 2023 |
| Astute Engineering Solutions Ltd | Professional & scientific | 2014 |
| ATB Accountancy and Taxation Services Ltd | Professional & scientific | 2012 |
| Atbe Collective Limited | Professional & scientific | 2013 |
| Atchoum Limited | Wholesale & retail | 2025 |
| ATF Solutions Limited | Professional & scientific | 2017 |
| Atfo Ltd | Hospitality | 2025 |
| Atom Trading Limited | Information & communication | 2012 |
| ATS Commercial Limited | Transport & logistics | 2010 |
| Attendance Solutions Ltd | Education | 2023 |
| Atti Electrical Ltd | Construction | 2016 |
| Auberg Media Ltd | Information & communication | 2024 |
| Auburn Apple Developments Limited | Extraterritorial | 2011 |
| Audio Visual Technical Support Services Ltd | Manufacturing | 2015 |
| AUK Supplies Limited | Wholesale & retail | 2004 |
| Aunties Caribbean Flava Ltd | Hospitality | 2025 |
| Aura Design and Photography Limited | Arts & recreation | 2017 |
| Aurora Dance Academy Ltd | Arts & recreation | 2018 |
| Austin Cycles Limited | Wholesale & retail | 2017 |
| Authentic Bespoke Limited | Manufacturing | 2017 |
| Auto A.R.T Devon Ltd | Wholesale & retail | 2010 |
| Auto Comps Ltd | Arts & recreation | 2023 |
| Auto Dynamix Limited | Wholesale & retail | 2018 |
| Auto LOW Limited | Wholesale & retail | 2015 |
| Auto Save (SW) Ltd | Wholesale & retail | 2012 |
| Auto Servicing & Diagnostics Limited | Wholesale & retail | 2002 |
| Autodoc (Newton Abbot) Limited | Wholesale & retail | 2004 |
| Avalon Antiques Ltd | Wholesale & retail | 2025 |
| Avantier Consultancy Ltd | Professional & scientific | 2024 |
| Avery Close Ltd | Construction | 2022 |
| Avery Commercials Limited | Manufacturing | 2014 |
| AW Books Limited | Wholesale & retail | 2025 |
| Awareness With Horses Community Interest Company | Education | 2017 |
| AWG Developments (SW) Ltd | Construction | 2016 |
| Awol Domestic Services Limited | Administrative & support | 2018 |
| Axiom Veterinary Laboratories Limited | Professional & scientific | 1990 |
| AXP Services Limited | Administrative & support | 2009 |
| Ayre Roofing Ltd | Construction | 2023 |
| Azdental Ltd | Health & social care | 2023 |
| Azro Limited | Information & communication | 2010 |
| B & a Psychologists Ltd | Education | 2015 |
| B & O Hospitality Ltd | Hospitality | 2026 |
| B 'N' M Property Management Ltd | Hospitality | 2025 |
| B Energy Limited | Professional & scientific | 2026 |
| B L Maintenance Ltd | Construction | 2015 |
| B&R Foster Holdings Ltd | Financial services | 2022 |
| B.B Van Hire & Sales Limited | Wholesale & retail | 1999 |
| B.Loder Limited | Wholesale & retail | 1965 |
| B.N.W. Business Systems Limited | Professional & scientific | 1983 |
| B.O.S.S. Stationers (Devon) Limited | Wholesale & retail | 2005 |
| B.P Tyres Limited | Wholesale & retail | 2013 |
| B2B Ventures Limited | Hospitality | 2019 |
| Babbacombe Garage Limited | Wholesale & retail | 2016 |
| Babbacombe Scaffolding ( Devon) Ltd | Construction | 2016 |
| Baber Medical Ltd | Other services | 2015 |
| Backtrack Europe Limited | Health & social care | 2005 |
| Badass Brit Limited | Real estate | 2025 |
| Badgebarn Limited | Agriculture & fishing | 1981 |
| Bags of Character Ltd | Wholesale & retail | 2024 |
| Bailey and Sons Property Torbay Limited | Real estate | 2025 |
| Baker Estates (SPV) Limited | Construction | 2017 |
| Baker Estates Limited | Construction | 2015 |
| Baker Holdings (SW) Limited | Financial services | 2015 |
| Baker Properties South West Limited | Real estate | 2024 |
| Baker Strategies Limited | Other services | 2016 |
| Bakers the Butchers Limited | Wholesale & retail | 2003 |
| Bale's Farm Community Outreach Ltd | Other services | 2022 |
| Bale's Farm Outdoor Learning Ltd | Education | 2022 |
| Baller Essentials Ltd | Wholesale & retail | 2025 |
| Balloon Express (UK) Limited | Wholesale & retail | 2000 |
| BAM BAM Construction Projects Ltd | Manufacturing | 2021 |
| Banana Llama Cafe Ltd | Hospitality | 2018 |
| Banyan Jewellery Limited | Wholesale & retail | 2011 |
| Bare Hands Ltd | Construction | 2019 |
| Barefoot Thinking Company Ltd | Administrative & support | 2007 |
| Barley Meadows (Brixton) Limited | Households | 2022 |