| 'THE Signature Event' Ltd | Administrative & support | 2026 |
| 1-3 Trevena Management Company Limited | Real estate | 2023 |
| 1-5 Carnon Gwel Management Company Limited | Households | 2025 |
| 1-5 the Haven (Truro) Management Company Limited | Real estate | 2016 |
| 10 Stratton Terrace Limited | Real estate | 2006 |
| 102 Durnford Street Management Company Limited | Real estate | 1999 |
| 12 Lower Market Street Limited | Households | 2014 |
| 15 Higher Market Street Management Company Limited | Households | 2004 |
| 15 Treyew Road Management Company Limited | Real estate | 2017 |
| 16 Dragons Meal Limited | Hospitality | 2025 |
| 1981 Barbershop Limited | Other services | 2020 |
| 2 Albany Road Management Company Limited | Households | 2001 |
| 2 Avenue Road Management Company Limited | Households | 2000 |
| 2-6 LFT Limited | Arts & recreation | 2024 |
| 20 Chapel Street Management Co Ltd | Households | 2016 |
| 20 Seaton Avenue Management Company Limited | Real estate | 2001 |
| 22 Edgcumbe Avenue Management Company Limited | Households | 2009 |
| 24 Evesham Road Freehold Ltd | Households | 2025 |
| 24HOURLONDON Ltd | Information & communication | 2016 |
| 25 Lannoweth Road Management Company Limited | Households | 2004 |
| 270 North Management Company Limited | Households | 2006 |
| 29 Richmond Terrace Limited | Households | 1981 |
| 3 and 4 the Quay Property Management Company Limited | Households | 2018 |
| 3 Sixteen UK Limited | Agriculture & fishing | 2008 |
| 3 Strangways Terrace Management Company Limited | Households | 2001 |
| 360 Property Hub Ltd | Information & communication | 2025 |
| 37 Steps Ltd | Real estate | 2024 |
| 3C Construction Limited | Construction | 2013 |
| 3D Land Surveys Ltd | Construction | 2006 |
| 3D Signs & Printing Ltd | Manufacturing | 2026 |
| 3HEADS Media LP | | 2022 |
| 3IDOG Limited | Administrative & support | 2009 |
| 3MS Maintenance Limited | Administrative & support | 2015 |
| 4S Medical Services Limited | Health & social care | 2016 |
| 4WAYS Contractors Ltd | Agriculture & fishing | 2022 |
| 5 Grove Place Management Limited | Real estate | 2005 |
| 5 Lansdowne Terrace Management Company NO. 2 Ltd | Households | 2012 |
| 5 Yards Ltd | Real estate | 2020 |
| 5SUBSEA Ltd | Professional & scientific | 2019 |
| 60 Fore Street Limited | Hospitality | 2022 |
| 67 Warner Road RTM Company Ltd | Households | 2017 |
| 752 Life Ltd | Wholesale & retail | 2018 |
| 8 Market Street Ltd | Real estate | 2018 |
| 8-16 Commercial Square Amenity Limited | Administrative & support | 2002 |
| 8088 Automotive Ltd | Manufacturing | 2024 |
| @Cornwall Law LLP | | 2011 |
| A & J Nicholls Limited | Financial services | 2018 |
| A & M Construction SW Ltd | Construction | 2022 |
| A a Developments Cornwall Limited | Construction | 2018 |
| A C Stallard & Associates Ltd | Financial services | 2018 |
| A Green Sweep Ltd | Administrative & support | 2020 |
| A J House Contract Carpentry Ltd | Construction | 2002 |
| A J Howes Design Ltd | Professional & scientific | 2019 |
| A Keen Leisure Ltd | Hospitality | 2021 |
| A Keen Properties Ltd | Real estate | 2015 |
| A Miller Financial Ltd | Financial services | 2015 |
| A R & a L Keen Limited | Wholesale & retail | 2005 |
| A Team Construction Cornwall Ltd | Construction | 2024 |
| A Truscott Carpentry Ltd | Construction | 2019 |
| A&J Global Ventures Ltd | Public administration | 2023 |
| A&J Nicholls Property Limited | Real estate | 2024 |
| A. G. Prowse Limited | Wholesale & retail | 2004 |
| A2B Cornwall Airport Limited | Extraterritorial | 2017 |
| A2B Falmouth Docks Limited | Extraterritorial | 2017 |
| A2B Falmouth Limited | Extraterritorial | 2017 |
| A2B Kernow Transport Services Limited | Extraterritorial | 2017 |
| A2B Patient Transport Services Cornwall Limited | Extraterritorial | 2017 |
| A2B Taxis (Truro) Limited | Transport & logistics | 2002 |
| A2B Taxis Cornwall Limited | Extraterritorial | 2017 |
| A2B Taxis Falmouth Limited | Extraterritorial | 2017 |
| A2B Taxis Helston Limited | Extraterritorial | 2020 |
| A2B Taxis Kernow Limited | Transport & logistics | 2017 |
| A2B Transport Falmouth Limited | Extraterritorial | 2017 |
| A2B Transport Services Cornwall Limited | Extraterritorial | 2017 |
| A2B Transport Truro Limited | Transport & logistics | 2015 |
| Aaradhya Foods Limited | Hospitality | 2024 |
| AB Electrical (SW) Ltd | Construction | 2024 |
| Abacus and Falmouth Taxis Limited | Transport & logistics | 2008 |
| ABB Estates Ltd | Construction | 2023 |
| Abbas Media Law Ltd | Professional & scientific | 2015 |
| Abbey Builders Truro Limited | Households | 1996 |
| Abbey Place Management Limited | Households | 2001 |
| ABC Sales Solutions Ltd | Wholesale & retail | 2022 |
| Abcd Property (Cornwall) Limited | Real estate | 2017 |
| Abel Burners Limited | Other services | 2020 |
| Able Electrical Truro Ltd | Construction | 2022 |
| Abode Studio Ltd | Hospitality | 2005 |
| Absolute Design (Cornwall) Ltd | Professional & scientific | 2010 |
| Abstoneworks Limited | Manufacturing | 2021 |
| Abstract Hippy Ltd | Wholesale & retail | 2020 |
| AC Holdings (Cornwall) Limited | Real estate | 2019 |
| Access Tech Ltd | Mining & quarrying | 2011 |
| Acdh Property Limited | Real estate | 2016 |
| Ace Education Global Ltd | Education | 2022 |
| Acheron Investments Ltd | Real estate | 2019 |
| Acid Jungle Ltd | Arts & recreation | 2025 |
| Acorn Four Ltd | Information & communication | 2024 |
| ACT Acoustics Ltd | Professional & scientific | 2017 |
| Action Credit Management Limited | Professional & scientific | 2010 |
| Active Index Solutions Limited | Information & communication | 2015 |