| Danning & Symons Limited | Real estate | 2002 |
| Danser (S.W.) Limited | Manufacturing | 1998 |
| Dark Malt Holdings Limited | Financial services | 2026 |
| Darren Rowe Financial Planning Limited | Financial services | 2009 |
| Datagile Ltd | Information & communication | 2020 |
| Davey Electrical Services Limited | Construction | 2004 |
| Davey Property Holdings Limited | Real estate | 2017 |
| David V. Elston & Co. Ltd | Professional & scientific | 2008 |
| David Witts Independent Consultancy Limited | Professional & scientific | 2018 |
| Daymer Lane Consultancy Ltd | Information & communication | 2021 |
| DC60 Pubs Ltd | Hospitality | 2025 |
| DE Villiers South West Limited | Hospitality | 2011 |
| Deer Park Management Limited | Professional & scientific | 1999 |
| Derry Wilson Holdings Limited | Professional & scientific | 2008 |
| Derry Wilson Limited | Wholesale & retail | 1998 |
| Designed 2 Create Ltd | Manufacturing | 2010 |
| Devon Gate Property Holdings Ltd | Real estate | 2018 |
| Dinas Properties Limited | Real estate | 1954 |
| Dinham Consulting Limited | Professional & scientific | 2011 |
| Dinham Farm Holidays Eco Ltd | Hospitality | 2017 |
| Domatia Limited | Real estate | 2012 |
| Driveline (GB) Limited | Transport & logistics | 2001 |
| Driveline (ST Austell) Limited | Other services | 2012 |
| Duchy Caravan Services Cornwall Limited | Administrative & support | 2001 |
| Duchy Designs South West Ltd | Construction | 2017 |
| Duchy Larder Limited | Hospitality | 2025 |
| Dunbarton Bess Ltd | Energy | 2024 |
| Dune Construction Cornwall Ltd | Construction | 2024 |
| Dunveth Development Company Limited | Real estate | 1998 |
| Eddystone Court Management Company Limited | Households | 2009 |
| EFD Consulting Ltd | Professional & scientific | 2022 |
| Egloshayle LLP | | 2016 |
| Electric Range Conversions Ltd | Wholesale & retail | 2012 |
| Elite Cleaning Property Services Limited | Professional & scientific | 2022 |
| Elite Spas & Leisure (SW) Ltd | Wholesale & retail | 2012 |
| Ellis Pipework Services Limited | Households | 2008 |
| ERA Adventures Ltd | Arts & recreation | 2009 |
| Ernies Ices Limited | Hospitality | 2023 |
| Escape Surfboards Limited | Manufacturing | 2004 |
| Event Powercraft Limited | Arts & recreation | 2026 |
| Event Water Safety Limited | Arts & recreation | 2010 |
| Everecho Ltd | Information & communication | 2026 |
| Everett Road 2 Limited | Real estate | 2019 |
| Evla Stay Ltd | Real estate | 2025 |
| Exeter Window Store Limited | Construction | 2009 |
| Exolegal Limited | Professional & scientific | 2019 |
| Exploration Situation Ltd | Education | 2018 |
| F & F Landscaping Limited | Administrative & support | 2019 |
| Fabric - Center for Change Ltd | Other services | 2025 |
| FEE Turner Catering Limited | Hospitality | 2013 |
| Fiveoak Storage Limited | Transport & logistics | 2019 |
| Flo's Kitchen Cornwall Limited | Hospitality | 2021 |
| Flying Tiger Soup Kitchen Ltd | Extraterritorial | 2024 |
| Foundation Records Ltd | Information & communication | 2003 |
| Fowlc Community Interest Company | Arts & recreation | 2022 |
| Francis Leisure Limited | Professional & scientific | 2007 |
| Fresh (GB) Ltd | Professional & scientific | 2005 |
| Frisby Limited | Wholesale & retail | 1962 |
| Front Line Emergency Equipment Trust Limited | Health & social care | 2004 |
| Gainstream Limited | Water & waste | 1989 |
| Gallop Enterprises Limited | Wholesale & retail | 1988 |
| George Cleave Fish Merchant Ltd | Wholesale & retail | 2022 |
| Georgia Bell Ltd | Health & social care | 2025 |
| GET Jaz’D Beauty Limited | Other services | 2025 |
| GF and DR Kendall Limited | Hospitality | 2011 |
| Glencoe Flats (Wadebridge) Management Company Limited | Real estate | 2017 |
| Global Coach Tours Ltd | Administrative & support | 2002 |
| Global Water Safety Limited | Public administration | 2019 |
| Glynnhayle Properties Limited | Construction | 2013 |
| GM Haus Ltd | Construction | 2021 |
| Go Walk Tall Ltd | Construction | 2015 |
| Gold Bloom Estates Ltd | Real estate | 2026 |
| Goonabarn Turbine Limited | Energy | 2014 |
| Green Box Thinking (Global) Ltd | Professional & scientific | 2024 |
| Greensplat Turbine Limited | Energy | 2013 |
| Greenwood Flats Management Company Limited | Real estate | 2013 |
| Ground Consultants Limited | Professional & scientific | 2021 |
| Gull Rock Amenity Limited | Other services | 2007 |
| Gull Rock Events Ltd | Public administration | 2014 |
| Gunheath Turbine Limited | Energy | 2015 |
| Gunvenna Holiday Park Limited | Extraterritorial | 2006 |
| Gwella Merchant Services Ltd | Administrative & support | 2026 |
| Gynn Construction Holdings Limited | Professional & scientific | 2008 |
| Gynn Construction Limited | Construction | 1990 |
| H & M Holiday Waste Collections Ltd | Water & waste | 2024 |
| H G Construction Management Limited | Construction | 2021 |
| H. J. Management Ltd. | Real estate | 1998 |
| H2 JOE Hydrographic Survey Services Limited | Administrative & support | 2017 |
| Haggerty Associates Ltd | Construction | 2023 |
| Halgabron Management Services Limited | Professional & scientific | 2000 |
| Hall & Debney Limited | Wholesale & retail | 1961 |
| Hall Associates Europe LLP | | 2006 |
| Halo Steel Ltd | Wholesale & retail | 2015 |
| Harbour Construction (Cornwall) Limited | Construction | 2004 |
| Harbour Ice Cornwall Limited | Wholesale & retail | 2025 |
| Harkness Consultancy Limited | Professional & scientific | 2015 |
| Harlyn Surf School Ltd | Administrative & support | 2022 |
| Harvey Framing and Giftware Limited | Manufacturing | 2002 |
| Have a Mooch Ltd | Wholesale & retail | 2017 |
| Hawksfield Nursery Ltd. | Education | 2015 |