| 1001 Books Limited | Information & communication | 2023 |
| 11 Alexandra RD Property Management Company Limited | Real estate | 2017 |
| 11 N Solutions Limited | Mining & quarrying | 2025 |
| 13 South Ltd | Financial services | 2023 |
| 16 Greenbank (Management) Limited | Households | 1984 |
| 18 Prentis Road Management Company Limited | Households | 2021 |
| 2 Arwenack Avenue Management Company Limited | Hospitality | 2014 |
| 2 Woodlane Crescent Flats Management Company (Falmouth) Limited | Real estate | 1985 |
| 22 Sports Limited | Wholesale & retail | 2020 |
| 2TWENTY2 S&C Ltd | Administrative & support | 2020 |
| 3DEEP Media Ltd | Information & communication | 2011 |
| 3SD Research Ltd | Professional & scientific | 2018 |
| 494 Films Ltd | Information & communication | 2023 |
| 5 Dunstanville Terrace Management Company Limited | Households | 2016 |
| 57KS Management Company Limited | Households | 2025 |
| 7-7A Stratton Place Management Limited | Households | 2008 |
| 789 Trefusis Road Ltd | Households | 2015 |
| 7WORKS Limited | Administrative & support | 2014 |
| 9/10 Quay Hill Management Company Limited | Households | 2010 |
| 9/10 Trevissome Court Limited | Households | 2013 |
| 9ELEVENSES Ltd | Wholesale & retail | 2023 |
| A Bray General Builder Limited | Construction | 2005 |
| A Game Sports Ltd | Wholesale & retail | 2012 |
| A W Surveyors Ltd | Professional & scientific | 2018 |
| A&K Consultants Limited | Professional & scientific | 2025 |
| A. Mandley Fencing Ltd | Construction | 2023 |
| Aacarestudios Ltd | Health & social care | 2026 |
| Aakash and Company Ltd | Hospitality | 2018 |
| Aberfal Community Greenspace CIC | Households | 2024 |
| Aberfal Publishing Company Limited | Information & communication | 2024 |
| Able Talent Ltd | Administrative & support | 2026 |
| Absolute Canvas Limited | Administrative & support | 2017 |
| Accademia Bridge Company Limited | Information & communication | 2005 |
| Aceeater Ltd | Hospitality | 2021 |
| Adam Phillips Plant Hire and Contractors Limited | Manufacturing | 2005 |
| Adam Pryor Ltd | Real estate | 2023 |
| Adelfas Limited | Construction | 2007 |
| Adept Logistics Limited | Professional & scientific | 2004 |
| Admiral's Quay Management Limited | Households | 1994 |
| Admiralty House Flat Management Ltd | Households | 2014 |
| Admiralty Place Limited | Health & social care | 2017 |
| Adoi Ltd | Education | 2026 |
| Adonis Strength & Fitness Ltd | Wholesale & retail | 2026 |
| Adonis Supplement Ltd | Other services | 2026 |
| Advent Cornwall Travel Solutions Ltd | Transport & logistics | 2025 |
| Aerosystems Ltd | Professional & scientific | 2021 |
| Aesc Workshops Ltd | Manufacturing | 2026 |
| Afterglow Drone Shows Ltd | Other services | 2024 |
| AG Properties Cornwall Ltd | Real estate | 2022 |
| Agency Rush Limited | Arts & recreation | 2022 |
| Agnes Toth Studio Ltd | Arts & recreation | 2020 |
| Agri Spray Drones Ltd | Agriculture & fishing | 2025 |
| AJ Holland Holdings Ltd | Administrative & support | 2022 |
| Alan Brown Development Services Limited | Professional & scientific | 2008 |
| Albatross AI Ltd | Information & communication | 2025 |
| Alderman Enterprises Ltd | Hospitality | 2026 |
| Alderwood Park (Block 2) Management Company Limited | Administrative & support | 1987 |
| Allsop Floors & Furniture Limited | Wholesale & retail | 2023 |
| Alpha Protect Ltd | Administrative & support | 2024 |
| ALT Cycling Limited | Wholesale & retail | 2022 |
| Alva 1 Ltd | Energy | 2013 |
| Amber Financial Services Limited | Professional & scientific | 2002 |
| Amberlea House Management Company Limited | Households | 2000 |
| Ambulavi Limited | Wholesale & retail | 2020 |
| Amethyst Fishing Company Ltd | Agriculture & fishing | 2002 |
| AMJ Renovations Southwest Ltd | Construction | 2025 |
| Anchorage Apartments Management Ltd | Households | 2025 |
| Andrew COX Marine Ltd | Professional & scientific | 2024 |
| Angbria Limited | Real estate | 2013 |
| Angling-School CIC | Education | 2013 |
| Anna Butterfield Limited | Arts & recreation | 2012 |
| Anon Ensemble Ltd | Arts & recreation | 2025 |
| Ansumco Ltd | Wholesale & retail | 2021 |
| Anthony Greenwood Photography Ltd | Professional & scientific | 2018 |
| Antique Christ Limited | Manufacturing | 2020 |
| AP Walker Limited | Education | 2022 |
| Apex Science and Conservation LLP | | 2025 |
| Apostrophe Architects Ltd | Professional & scientific | 2009 |
| Apply Creative Ltd | Professional & scientific | 2011 |
| Apply Works Ltd | Professional & scientific | 2015 |
| Arch Talent Limited | Administrative & support | 2025 |
| Archetype Copywriting Ltd | Professional & scientific | 2024 |
| ARD Studio Limited | Professional & scientific | 2014 |
| Arden Asia Company Limited | Wholesale & retail | 1992 |
| Ardent SW Ltd | Construction | 2018 |
| Argo Engineering Limited | Professional & scientific | 2025 |
| Armada Engineering Limited | Manufacturing | 1989 |
| Armadillo Property Ltd | Real estate | 2019 |
| Arnam Consulting Services Limited | Construction | 2015 |
| Arracont Consulting Ltd | Information & communication | 2015 |
| Arsalan Trading Ltd | Wholesale & retail | 2025 |
| Art of Meditation Foundation Ltd | Health & social care | 2013 |
| Art School Media Limited | Professional & scientific | 2018 |
| Art World Limited | Wholesale & retail | 2000 |
| Arth Investments Ltd | Real estate | 2026 |
| Arth Properties Ltd | Real estate | 2026 |
| Arts Well UK CIC | Health & social care | 2016 |
| Artzaboutit Ltd | Health & social care | 2020 |
| Arvor Properties Ltd | Administrative & support | 2017 |
| Arwenack Consulting Ltd | Information & communication | 2023 |