| AJ Roofing & Cladding Limited | Construction | 2017 |
| AJ Windows and Glass Ltd | Construction | 2023 |
| AJH Communications Ltd | Wholesale & retail | 2020 |
| AJM Builders Ltd | Construction | 2025 |
| AK Management Property Limited | Real estate | 2026 |
| AK Marine Services (Devon) Limited | Manufacturing | 2017 |
| AK Property London Ltd | Real estate | 2022 |
| AK Roofing and Property Maintenance Limited | Construction | 2020 |
| Akimbo Ltd | Manufacturing | 2024 |
| Akorn Bespoke Installations Ltd | Wholesale & retail | 2020 |
| AL Accountancy Ltd | Professional & scientific | 2022 |
| Alansway Taxis Limited | Transport & logistics | 1982 |
| Albion Court Management Company (Brixham) Limited | Real estate | 2002 |
| Alec Hoare & SON Limited | Construction | 2003 |
| Alex Champion Design Ltd. | Professional & scientific | 2012 |
| Alex Walker Education Limited | Education | 2023 |
| Alex Walker Limited | Professional & scientific | 2021 |
| Alexandra Lodge Torquay RTM Company Limited | Administrative & support | 2014 |
| Alexca Ltd | Health & social care | 2024 |
| ALG' Breizh Limited | Health & social care | 2017 |
| Algys Autos Imports Ltd | Wholesale & retail | 2014 |
| ALH Consulting Limited | Professional & scientific | 2025 |
| ALL Doors (South West) Limited | Other services | 2004 |
| ALL Doors South West Fire & Security Limited | Administrative & support | 2022 |
| ALL Floral Ltd. | Administrative & support | 2017 |
| ALL Go Greens Ltd | Hospitality | 2023 |
| ALL Guys Ltd | Real estate | 2022 |
| ALL Sport Insurance Services Limited | Financial services | 2015 |
| ALL Sport Ireland Limited | Financial services | 2023 |
| Allaway Property Investments Ltd | Construction | 2023 |
| Allen's Electrical Ltd | Construction | 2013 |
| Aller Vale Garage (COX Bros.) Limited | Wholesale & retail | 1981 |
| Allerton Land Ltd | Agriculture & fishing | 2012 |
| Alliance Build Company Limited | Construction | 2014 |
| Alliance Plastering Limited | Construction | 2005 |
| Allied Hotels Limited | Extraterritorial | 1937 |
| Allprofitiq Limited | Information & communication | 2026 |
| Allsop & Pitts Refrigeration Limited | Construction | 2025 |
| Alma Court (Taunton) Management Company Limited | Households | 2008 |
| Alpes General Solutions Limited | Administrative & support | 2016 |
| Alpha Networx Ltd | Information & communication | 2016 |
| Alpha Roof Care Ltd | Construction | 2025 |
| Alpi Botanic Ltd | Wholesale & retail | 2026 |
| Alpi Flora Ltd | Wholesale & retail | 2026 |
| Alpi Garden Ltd | Wholesale & retail | 2026 |
| Alpi Supplies Ltd | Wholesale & retail | 2026 |
| Alpine Lodge 2017 Limited | Health & social care | 2017 |
| Alpine Lodge 2026 Ltd | Health & social care | 2026 |
| Alpine Lodge RCH Limited | Health & social care | 1994 |
| Alpine Lodge Trading Limited | Health & social care | 2009 |
| Alpine Villa Management Company Limited | Households | 1988 |
| Alqrinawi Tailoring Academy Ltd | Professional & scientific | 2019 |
| Alstrom Syndrome Europe | Health & social care | 2014 |
| Alstrom Syndrome UK | Health & social care | 1998 |
| Always BE Cycling Limited | Education | 2010 |
| AMA Mobiles Limited | Wholesale & retail | 2019 |
| Amanda Ayshford Estate Agents Limited | Real estate | 2022 |
| Amara Dale Ltd | Other services | 2023 |
| Amara Lifestyle Ltd | Professional & scientific | 2021 |
| Ambassador House Management Company Limited | Households | 2002 |
| Ambercoast Extensions and Property Renovations Ltd | Construction | 2025 |
| Amberkane Limited | Wholesale & retail | 2019 |
| Amberley Court Management Company (Torquay) Limited | Households | 1987 |
| Ambrook Residents Association Limited | Households | 1992 |
| AMJ 33 Limited | Construction | 2020 |
| AMP SW Ltd | Health & social care | 2026 |
| Amtek Global Limited | Professional & scientific | 1999 |
| Amtek Precision Engineers Limited | Manufacturing | 2002 |
| Anapath Ltd | Health & social care | 2026 |
| ANB Smile Limited | Health & social care | 2022 |
| Anchor Hotel Porlock Weir (2018) Ltd | Hospitality | 2018 |
| Anderlex Legal Ltd | Professional & scientific | 2026 |
| Andrea Court Management Company Limited | Real estate | 2006 |
| Andrea Law Ltd | Professional & scientific | 2012 |
| Andrea Marquez Limited | Health & social care | 2024 |
| Andrew Bickley Associates Ltd | Professional & scientific | 2014 |
| Andrew Developments Limited | Construction | 2005 |
| Andrew Ellis Art Ltd | Arts & recreation | 2022 |
| Andrew Piller Associates Limited | Manufacturing | 2015 |
| Andrew Price & Co Accountants Limited | Extraterritorial | 2002 |
| Andrew Price & Co Limited | Professional & scientific | 2010 |
| Andrew's Cleaning South West Limited | Administrative & support | 2015 |
| Angel Wharf Limited | Hospitality | 2021 |
| Angelic Scents Ltd | Wholesale & retail | 2008 |
| Angleside BL Limited | Administrative & support | 2023 |
| Annagram ITS Limited | Wholesale & retail | 2013 |
| Annandale Management Company Limited | Households | 2025 |
| Annex Properties Limited | Real estate | 1990 |
| Ansteys Court (TQ1 3TB) RTM Company Limited | Households | 2025 |
| Ansteys Cove Cafe Ltd | Hospitality | 2026 |
| Ansteys LEA Hotel Limited | Hospitality | 2013 |
| Ansteys LEA Limited | Hospitality | 2006 |
| Anthony Court RTM Limited | Households | 2010 |
| Anthony Waring of Dartmouth Limited | Other services | 2013 |
| Antony Nelson Limited | Health & social care | 2024 |
| Anyfish Anywhere (UK) Limited | Manufacturing | 2004 |
| AP Support Services Ltd | Administrative & support | 2014 |
| APA Developments Ltd | Real estate | 2022 |
| Apanes Ltd | Health & social care | 2011 |
| Apex Shift Ltd | Information & communication | 2023 |