| 08840960 Limited | Real estate | 2014 |
| 1 Alexandra Terrace Management Company Limited | Real estate | 2004 |
| 1 Belmont Villas Management Company Limited | Households | 2022 |
| 10 Alverton Terrace Management Company Limited | Households | 2023 |
| 11 Clarence Street Ltd | Households | 2018 |
| 120 East ROW Ltd | Real estate | 2026 |
| 13 Clarence Street Management Limited | Households | 2000 |
| 14 ST Margarets Road Oxford Limited | Households | 1992 |
| 1608 Hospitality Limited | Hospitality | 2026 |
| 17 Lucien Road Limited | Hospitality | 2001 |
| 18/18A Alverton Street Management Company Limited | Real estate | 2019 |
| 2 Belmont Villas Management Company Limited | Households | 2005 |
| 2 Brighton Terrace Limited | Real estate | 2022 |
| 2 Fore Street Limited | Wholesale & retail | 2010 |
| 29 Chapel Street Management Company Limited | Households | 2021 |
| 29MJS Ltd | Real estate | 2023 |
| 3 Brighton Terrace Limited | Real estate | 2022 |
| 3 OH EN Limited | Arts & recreation | 2020 |
| 3 Square Meals Limited | Hospitality | 2022 |
| 4 the Greenmarket Ltd | Real estate | 2025 |
| 45QST Ltd | Wholesale & retail | 2023 |
| 7 TAG Limited | Extraterritorial | 2012 |
| 94MJS Penzance C.I.C. | Arts & recreation | 2026 |
| A Hampton SW Limited | Construction | 2026 |
| A T Architecture Limited | Construction | 2014 |
| A T Wearne & Sons (Building Contractors) Limited | Construction | 2009 |
| A Tonkin Roofing Services Cornwall Ltd | Construction | 2024 |
| A.E. Stokes Properties Limited | Real estate | 1978 |
| A.G.O. Hospitality Ltd | Hospitality | 2021 |
| A1 Construction Cornwall Ltd | Construction | 2025 |
| A2 Rigging Limited | Manufacturing | 1996 |
| A38 Ltd | Information & communication | 2006 |
| Aardvark Substations Limited | Real estate | 2008 |
| Abbotswood Consultancy Services Limited | Professional & scientific | 2015 |
| Abbotswood Corporate Services Limited | Information & communication | 2008 |
| Abbotswood Group Limited | Financial services | 2024 |
| Abbotswood Taxation and Accountancy Services Limited | Professional & scientific | 2013 |
| ABI Ward Interiors Limited | Professional & scientific | 2024 |
| Absolute Accommodation Limited | Real estate | 2022 |
| Acer Property Estate Ltd | Real estate | 2020 |
| Acoustic Streams Limited | Wholesale & retail | 2020 |
| Adam Builds South West Ltd | Construction | 2023 |
| Addition Accountants Penzance Limited | Professional & scientific | 2021 |
| Addition Corporate Services Limited | Extraterritorial | 2011 |
| AEE Jupiter Ltd | Professional & scientific | 2019 |
| Aiva Media Ltd | Information & communication | 2026 |
| Aiva Services Group Ltd | Professional & scientific | 2026 |
| Akouo Sound Services Limited | Information & communication | 2025 |
| Alan Paver Limited | Professional & scientific | 2020 |
| Alarm Guard Limited | Administrative & support | 2007 |
| Alexa Homes Limited | Real estate | 2017 |
| Alexa Homes South West Limited | Real estate | 2019 |
| Aliya Spice Limited | Hospitality | 2022 |
| ALL Points West Embroidery & Print Ltd | Manufacturing | 2021 |
| ALL Washed UP 22 Limited | Other services | 2022 |
| Allied Acquisitions Limited | Financial services | 2024 |
| Alloys Trading Ltd | Professional & scientific | 2010 |
| Alphapit Consulting Limited | Mining & quarrying | 2025 |
| Alverton Holdings Limited | Administrative & support | 2016 |
| Ambush Productions Ltd | Information & communication | 2019 |
| AN Rosen Wynn Ltd | Information & communication | 2024 |
| Ancarva Management Limited | Households | 2020 |
| Ancorn Ltd | Financial services | 2023 |
| Anella Bar and Kitchen Ltd | Hospitality | 2026 |
| Angus Advisory Ltd | Professional & scientific | 2025 |
| Angwin Holdings Limited | Agriculture & fishing | 2019 |
| Anita's Cozy Retreat Ltd | Hospitality | 2026 |
| Ankor Cornwall Limited | Manufacturing | 2018 |
| Anna Land Limited | Construction | 2025 |
| Anonymous Recovering Communities (ARC) CIC | Education | 2026 |
| Anstee Gordon Limited | Real estate | 2025 |
| Antiques & Fine Art Limited | Wholesale & retail | 2003 |
| Antoine Villa Limited | Extraterritorial | 1965 |
| APC Supply Chain Solutions Ltd | Professional & scientific | 2022 |
| Appstart Ltd | Information & communication | 2019 |
| Archibald Mackinnon Limited | Health & social care | 2022 |
| Ardent Engineering Limited | Professional & scientific | 2006 |
| Argania Spinosa Limited | Wholesale & retail | 2012 |
| Arise Construction Ltd | Construction | 2019 |
| Arlouie Investments Limited | Real estate | 2024 |
| Armour House Limited | Professional & scientific | 2015 |
| Art in Mind Limited | Arts & recreation | 2003 |
| Art Stafford Limited | Arts & recreation | 2025 |
| Artconnexion UK CIC | Education | 2018 |
| Arthur V Williams Ltd | Wholesale & retail | 2019 |
| ASH Control Systems Ltd | Other services | 2001 |
| Assetbuy Limited | Professional & scientific | 1988 |
| Atelier; HB Architects Ltd | Professional & scientific | 2026 |
| Atheda Limited | Information & communication | 2007 |
| Atlantic Adventures Limited | Administrative & support | 2023 |
| Atlantic Developments (Penwith) Ltd | Construction | 2018 |
| Atlantic Pools Limited | Construction | 2005 |
| Atlantic Watch Management Ltd | Real estate | 2024 |
| Atlantis Psychiatry Ltd | Health & social care | 2026 |
| Aubrey South West Ltd | Construction | 2024 |
| Aungier Lefevres Limited | Financial services | 2016 |
| Avalon Kernow Limited | Information & communication | 2025 |
| Awen Productions Community Interest Company | Information & communication | 2006 |
| Ayrsher Homes Limited | Construction | 2018 |
| B R G Direct Limited | Information & communication | 1995 |