| 06995157 Limited | Manufacturing | 2009 |
| 15-17 Castle Green Management Limited | Households | 2017 |
| 18 North Road East (Plymouth) Limited | Real estate | 1989 |
| 2SIMPLYLEARN Limited | Education | 2021 |
| 3HW Architecture and Design Limited | Professional & scientific | 2012 |
| 60 Penpol Terrace Management Company Limited | Real estate | 2004 |
| 674RCV Limited | Administrative & support | 2001 |
| A & a Stratford Ltd | Professional & scientific | 2020 |
| A C Richardson Ltd | Construction | 2008 |
| A Carey Electrical Ltd | Construction | 2023 |
| A Carey Limited | Professional & scientific | 2024 |
| A J Francis Building Contractors Ltd | Construction | 2021 |
| A P Brown Limited | Administrative & support | 2015 |
| A.C Properties Limited | Administrative & support | 2001 |
| A.D.M. Contractors Limited | Construction | 2004 |
| A.P. Diving Limited | Manufacturing | 1988 |
| A1 Appliances Falmouth Ltd | Other services | 2025 |
| A1 Cars Cornwall Ltd | Wholesale & retail | 2022 |
| A1CARSOFCORNWALL. Ltd | Wholesale & retail | 2018 |
| Abmeth Holdings Ltd | Financial services | 2025 |
| AC and DA Richards Limited | Other services | 2008 |
| Access Cornwall C.I.C. | Information & communication | 2019 |
| ACR Recruitment & Training Ltd | Administrative & support | 2015 |
| AD Sales Ltd | Wholesale & retail | 2026 |
| Adaptive CAM Solutions Limited | Professional & scientific | 2019 |
| Aethelon Ltd | Professional & scientific | 2025 |
| Affina Marine Ltd | Manufacturing | 2005 |
| Afwm Limited | Financial services | 2011 |
| AGN Football Ltd | Information & communication | 2025 |
| Aislet Ltd | Construction | 2000 |
| Ak’S Creations Ltd | Manufacturing | 2025 |
| Albany Events Group Limited | Hospitality | 2026 |
| Alex Vitas Ltd | Health & social care | 2022 |
| Algarnick Farms Ltd. | Agriculture & fishing | 1997 |
| Align Chiropractic Cornwall Ltd | Health & social care | 2021 |
| Allchem Treatments Limited | Arts & recreation | 1983 |
| Allen & Fernie Ltd | Construction | 2023 |
| Allen's Motor Repairs Limited | Wholesale & retail | 2021 |
| Allglass Cornwall Limited | Construction | 2014 |
| Alltech Systems (UK) Ltd | Construction | 2005 |
| Aluco Ecology Limited | Professional & scientific | 2005 |
| Ambient Pressure Diving Limited | Manufacturing | 2000 |
| Amos Pumps (U.K.) Limited | Construction | 1980 |
| Andidico Ltd | Other services | 1999 |
| Andra Rosu Ltd | Health & social care | 2024 |
| Andy's Electrical Services Limited | Construction | 2023 |
| Angegyn Ltd | Manufacturing | 2013 |
| Angel Wire Aviation Limited | Professional & scientific | 2018 |
| Angrouse Court Management Company Limited | Professional & scientific | 2011 |
| Anna Wilson Property Ltd | Construction | 2019 |
| Antoinette Christine Gilbert Ltd | Extraterritorial | 2024 |
| AP Auto Repairs Cornwall Ltd | Wholesale & retail | 2025 |
| Apartment 4 29 Chapel Street Ltd | Hospitality | 2024 |
| Araca Properties Ltd | Real estate | 2022 |
| Arbor Resources Limited | Professional & scientific | 2024 |
| Archways (Cornwall) Limited | Construction | 2003 |
| Arrc Print Limited | Manufacturing | 2013 |
| Arvor Electrical Ltd | Construction | 2020 |
| ASM White Holdings Ltd | Real estate | 2022 |
| Asrcooling Ltd | Construction | 2026 |
| Associated Armour Ltd | Public administration | 2009 |
| Associated Construction Trades Limited | Wholesale & retail | 2003 |
| Association of Accessible Employers CIC | Education | 2021 |
| AT Beijing Cuisine Limited | Hospitality | 2026 |
| ATB Electrical Contractors Limited | Construction | 2013 |
| Atkinson Group (Helston) Limited | Wholesale & retail | 2003 |
| Atlantic Rigging Ltd | Manufacturing | 2022 |
| Atlasecommerce Limited | Wholesale & retail | 2025 |
| Atmosphere Publishing Limited | Information & communication | 2013 |
| Autow Services Ltd | Professional & scientific | 2026 |
| AW Fencing Limited | Construction | 2024 |
| AYA Capital Limited | Real estate | 2026 |
| B&G Waste Removal Ltd | Water & waste | 2025 |
| B. Harvey Property Services Ltd | Construction | 2005 |
| Badger Golf Supply Limited | Wholesale & retail | 2025 |
| BAL View Court Flat Management Limited | Real estate | 2010 |
| Bannister Finance Ltd | Professional & scientific | 2023 |
| Barefoot Shoes Limited | Wholesale & retail | 2017 |
| Barepta Cove Limited | Construction | 2002 |
| Barnes Ramm Limited | Hospitality | 2007 |
| Barnswood Limited | Manufacturing | 1994 |
| Bart Investments Ltd | Real estate | 2026 |
| BAT Engineering (Cornwall) Ltd | Construction | 2023 |
| Battrestore Ltd | Wholesale & retail | 2026 |
| Bay Beauty Co Ltd | Other services | 2022 |
| BE Extant Ltd | Administrative & support | 2012 |
| BE Gorgeous Hairdressing Limited | Other services | 2005 |
| Beacon Legal Limited | Professional & scientific | 2011 |
| Beacon Plumbing & Heating Ltd | Construction | 2013 |
| Beacon Training & Consultancy Ltd | Professional & scientific | 2021 |
| Bear One Properties Ltd | Real estate | 2020 |
| Beer BED and Breakfast Ltd | Information & communication | 2013 |
| Beks Developments Limited | Real estate | 2008 |
| BEN and Molly Limited | Hospitality | 2012 |
| BEN Bellamy Builders Limited | Construction | 2010 |
| Benwallisgardens Limited | Administrative & support | 2020 |
| Bespoke Silver and Gold Limited | Manufacturing | 2017 |
| Better Buy Energy Limited | Professional & scientific | 2026 |
| Betterlife Financial Planning Limited | Professional & scientific | 2025 |
| Beyond the Wave CIC | Other services | 2019 |