| 1 2 3 Associated Taxis Limited | Transport & logistics | 1996 |
| 1 Fore Street Limited | Real estate | 2024 |
| 14 Castle Street Management Limited | Hospitality | 1996 |
| 14 Park Avenue Management Company Limited | Hospitality | 2005 |
| 3 Fowey Limited | Real estate | 2024 |
| 3DTP Limited | Professional & scientific | 2003 |
| 4 Belmont Terrace Ltd | Real estate | 2007 |
| 4 Pauls Terrace Management Company Limited | Households | 1997 |
| 49 Church Street Mevagissey Property Management Ltd | Households | 2024 |
| 5 Star Heating & Renewable Energy Limited | Construction | 2021 |
| 7 Strangways Terrace Management Company Limited | Households | 2002 |
| A&G Technical Solutions Ltd | Professional & scientific | 2006 |
| A.J.L. Limited | Real estate | 1959 |
| Abbey Builders (2006) Limited | Construction | 2006 |
| Abbey Builders Contractors Limited | Construction | 2002 |
| Abbey Builders Cornwall Limited | Real estate | 2001 |
| Abbeyfield Builders Limited | Construction | 2003 |
| Abs-Solute Health & Fitness LLP | | 2021 |
| Abundant Ltd | Administrative & support | 2022 |
| Access Training (South West) Ltd. | Education | 1998 |
| Ace Engineering (South West) Ltd | Professional & scientific | 1993 |
| Ace General Engineering (Cornwall) Ltd | Manufacturing | 1993 |
| Active Living Fitness Limited | Arts & recreation | 2024 |
| Adam Wheeler Mining Consultant Ltd | Mining & quarrying | 2018 |
| Adminrescue Limited | Professional & scientific | 2007 |
| Advance Group Europe Ltd | Water & waste | 2025 |
| Advanced Chemical Intermediates Limited | Professional & scientific | 2006 |
| AGJ Enterprises Limited | Hospitality | 2005 |
| Agricultural Engineering LP | | 2017 |
| Agricultural Sales and Service Ltd | Wholesale & retail | 2003 |
| AGS Utilities Limited | Wholesale & retail | 2006 |
| Ailec Holdings Limited | Other services | 1982 |
| Airculture Limited | Wholesale & retail | 2003 |
| Airfield Productions Limited | Manufacturing | 1997 |
| Alan Kingsbury Limited | Arts & recreation | 2002 |
| Alan Symons Decorating Limited | Construction | 2007 |
| Alfred Smith & SON (Penzance) Limited | Wholesale & retail | 1960 |
| Allen & Heath Limited | Manufacturing | 2001 |
| Allen & Lock Limited | Transport & logistics | 1931 |
| Altitude Cornwall Ltd | Arts & recreation | 2021 |
| Ammodytes Co. Limited | Other services | 1979 |
| Ammotec UK Ltd | Wholesale & retail | 1969 |
| Amplitude Tax Accountants Limited | Professional & scientific | 2004 |
| Ancestral Investments Limited | Real estate | 2025 |
| Andrew Davy Electrical (South West) Limited | Construction | 1996 |
| Andrew Symons Electrical Contractor Limited | Construction | 2000 |
| Andrew Toms Car Sales Limited | Wholesale & retail | 2007 |
| Andy Gilbert Plant Hire Limited | Construction | 2006 |
| Angelato Limited | Hospitality | 2017 |
| Angstrom Precision Limited | Information & communication | 2015 |
| Anic UK Limited | Real estate | 2006 |
| Animal Veterinary Services Limited | Professional & scientific | 2002 |
| Anton Parris (Motor Cycles) Limited | Wholesale & retail | 1980 |
| Anzio Training Limited | Education | 2001 |
| Approved Site Investigations Limited | Professional & scientific | 2006 |
| Aqua ROD (South West) Limited | Water & waste | 2003 |
| Aquagas (Cornwall) Limited | Construction | 2006 |
| Aradis Limited | Construction | 2001 |
| Arcol U.K. Limited | Manufacturing | 1952 |
| Asacis Limited | Professional & scientific | 1994 |
| Asha Restaurant (Falmouth) Ltd | Hospitality | 2005 |
| Aspectunit Property Management Limited | Households | 1998 |
| Atlantic Caravans (Cornwall) Ltd | Wholesale & retail | 2015 |
| ATV Centre Limited | Wholesale & retail | 2007 |
| Austcornish Adventures Limited | Manufacturing | 2006 |
| Autoapply Limited | Professional & scientific | 1996 |
| Ayoub Locum Ltd | Wholesale & retail | 2025 |
| Azar Batri Uormiya Consulting Ltd | Transport & logistics | 2025 |
| B C P Property Limited | Real estate | 2022 |
| B.F.C. - Carpet World Limited | Wholesale & retail | 1989 |
| Bag-It-All.Com Ltd | Professional & scientific | 2000 |
| Bagley Marine Limited | Professional & scientific | 2001 |
| Balaena Ltd | Manufacturing | 2019 |
| Balme Kitchen & Pearce Limited | Professional & scientific | 2000 |
| Barnwell Equestrian Centre Ltd | Agriculture & fishing | 2020 |
| Battling on Community Interest Company | Health & social care | 2012 |
| Beak Social Club Ltd | Hospitality | 2023 |
| Beaver Blinds (Cornwall) Limited | Wholesale & retail | 2004 |
| Beech Motors (ST. Austell) Limited | Wholesale & retail | 1978 |
| Behavingbeardly Ltd | Professional & scientific | 2021 |
| Bellamystudio Limited | Information & communication | 2005 |
| Belyars Limited | | 1979 |
| Beresford Fishing Ltd | Agriculture & fishing | 2021 |
| Betpharma UK Limited | Wholesale & retail | 2006 |
| Biddick Contractors Ltd | Agriculture & fishing | 2013 |
| Big Sky Property Ltd | Real estate | 2023 |
| Biotech Industrial Products Limited | Wholesale & retail | 1987 |
| Birchtime Limited | Professional & scientific | 2003 |
| BK Developments SW Ltd | Construction | 2005 |
| Blackwell Bate Ltd | Professional & scientific | 2003 |
| Blake Construction (Cornwall) Limited | Construction | 2004 |
| Blakes Bakery Limited | Manufacturing | 2010 |
| Blakes Developments Limited | Wholesale & retail | 1987 |
| Blast Clean and Coatings Limited | Manufacturing | 2003 |
| Blue Rush WET Suits Limited | Wholesale & retail | 2004 |
| Blueriver Steel Buildings (South West) Ltd | Construction | 2007 |
| Boconnoc Shoot | | 2004 |
| Bodmin Concrete Products Limited | Manufacturing | 1980 |
| Bond-Trerule Limited | Financial services | 2024 |
| Borea Court Management Company Limited | Households | 1989 |