| Andrew VOS Limited | Information & communication | 2011 |
| Andy Weir Consulting Limited | Information & communication | 2025 |
| Angnev Catering Ltd | Wholesale & retail | 2016 |
| Anna DL HR Consultancy Ltd | Administrative & support | 2023 |
| Anna Marston Lettings Ltd | Real estate | 2014 |
| Another Place Developments Limited | Hospitality | 2013 |
| Another Place Limited | Hospitality | 2015 |
| Antique Fairs Cornwall Limited | Wholesale & retail | 2015 |
| AOJ Ltd | Real estate | 2023 |
| APJ Hospitality Ltd | Hospitality | 2019 |
| Apogee Marine Construction Ltd | Professional & scientific | 2024 |
| Apple Tree Homes Ltd | Construction | 2018 |
| Applewood Management Cornwall Limited | Real estate | 2021 |
| APRES360 Limited | Households | 2026 |
| APS Steam Cleaning Ltd | Administrative & support | 2018 |
| Aral Growers CIC | Agriculture & fishing | 2024 |
| ARAS34 Limited | Hospitality | 2025 |
| Arcane Markets Ltd | Education | 2025 |
| Arch Concepts (Cornwall) Limited | Professional & scientific | 2018 |
| Archforce Engineering Limited | Construction | 1988 |
| Architectural Services (South West) LLP | | 2011 |
| Arcoaches Limited | Transport & logistics | 2025 |
| Ariem Consulting Ltd | Administrative & support | 2013 |
| ARK Sustainable Architecture Ltd | Professional & scientific | 2014 |
| Arnell Construction Ltd | Construction | 2018 |
| Art 4 Life CIC | Arts & recreation | 2025 |
| Artisan Coffee Newquay Limited | Hospitality | 2026 |
| Aruba BLU Limited | Other services | 2011 |
| Aruba Hair Studios Limited | Other services | 2011 |
| Arvor Carpentry & Construction Ltd | Construction | 2022 |
| Arwenack House Management Company Limited | Households | 2023 |
| AS Rigging & Rescue Ltd | Construction | 2016 |
| ASH Carpentry Build Ltd | Manufacturing | 2025 |
| Ashlander Ltd | Hospitality | 2022 |
| Ashton Court (Maisonettes) Limited | Real estate | 1971 |
| ASM Products Ltd | Wholesale & retail | 2016 |
| Assay House (Cornwall) Limited | Construction | 2025 |
| Assay House (Truro) Limited | Real estate | 2025 |
| Assay House Apartments (Truro) Limited | Households | 2026 |
| Assay House Service Company Limited | Households | 2020 |
| Atlanta Flats Management Company (2009) Limited | Households | 2009 |
| Atlantek Architects Ltd | Professional & scientific | 2025 |
| Atlantic Aircraft Limited | Education | 2026 |
| Atlantic Coast Associates (Cornwall) Limited | Financial services | 2014 |
| Atlantic Coast Developments Limited | Construction | 2025 |
| Atlantic Conversions Ltd | Construction | 2001 |
| Atlantic Distillery Ltd | Manufacturing | 2017 |
| Atlantic Reach Limited | Hospitality | 2012 |
| Atlantic View Cafe Ltd | Hospitality | 2019 |
| Atlas Media Limited | Information & communication | 2019 |
| Attenborrow Court Property Management Limited | Households | 2000 |
| Aurora Management and Consulting Limited | Professional & scientific | 2024 |
| Autocourt Limited | Wholesale & retail | 1997 |
| Avear Limited | Manufacturing | 2016 |
| Avel Advisory Limited | Information & communication | 2026 |
| Awen Nook Ltd | Wholesale & retail | 2026 |
| Aztec Build Limited | Construction | 2010 |
| Azure Newquay Limited | Households | 2015 |
| B R Nicholls Ltd | Agriculture & fishing | 2026 |
| Babel Fish Limited | Education | 2017 |
| Baines Direct Trading Ltd | Wholesale & retail | 2025 |
| Baker Associate Services Limited | Health & social care | 2016 |
| Bakers Court Limited | Real estate | 2015 |
| Ballytrone Limited | Professional & scientific | 2023 |
| Bank Street Kitchen Ltd. | Hospitality | 2020 |
| Barber Cornwall Ltd | Other services | 2022 |
| Barefeet Adventure Limited | Arts & recreation | 2012 |
| Barefeet Promotions Limited | Other services | 2002 |
| Barefoot in Newquay Limited | Real estate | 2023 |
| Barlandu Solutions Ltd | Professional & scientific | 2025 |
| Barley Wine PUB Co Ltd | Hospitality | 2026 |
| Barnes Property Holdings Ltd | Real estate | 2020 |
| Barracuda South Ltd | Hospitality | 2018 |
| Barrowfield Views Management Company Limited | Households | 2006 |
| Basepro Ltd | Construction | 2017 |
| Bay View (Newquay) Limited | Households | 2004 |
| Bayly Builders Limited | Construction | 2013 |
| Bazeley Construction Ltd | Construction | 2016 |
| Baía the Brand Ltd | Wholesale & retail | 2025 |
| BC Management ST Ives Limited | Households | 2015 |
| Beach Road Management Company Limited | Professional & scientific | 1987 |
| Beach Shack Hair and Beauty Limited | Other services | 2011 |
| Beacon CFO Ltd | Professional & scientific | 2026 |
| Beacon Construction Consultancy Ltd | Construction | 2012 |
| Beagle Media Holdings Limited | Financial services | 2024 |
| Bearded Property Group Limited | Households | 2026 |
| Beaumar Construction Limited | Construction | 1979 |
| Beautique Newquay Limited | Administrative & support | 2017 |
| Becca Hall Illustration Ltd | Arts & recreation | 2019 |
| Beckcourt Limited | Construction | 1996 |
| Bedruthan Hotel Limited | Hospitality | 2003 |
| Beer Brewery Ltd | Extraterritorial | 2022 |
| Bees & Bear Limited | Wholesale & retail | 2022 |
| Beige Donuts Limited | Wholesale & retail | 2022 |
| Belmont Place Management Company Limited | Households | 2017 |
| Bespoke Engineering Services Limited | Professional & scientific | 2025 |
| Bespoke Holdings Cornwall Ltd | Financial services | 2023 |
| Beth Main Limited | Health & social care | 2023 |
| Bettsco Limited | Financial services | 2023 |
| Bettymax Limited | Hospitality | 2022 |