| Fluid Branding Holdings Limited | Financial services | 2018 |
| Fluid Branding Limited | Professional & scientific | 2006 |
| FLY With the Eagles Limited | Real estate | 2021 |
| FNX Logistic Ltd | Transport & logistics | 2025 |
| Fonemechanix Truro Limited | Other services | 2013 |
| Footgolf Frenzy Ltd | Arts & recreation | 2017 |
| Forgena Limited | Manufacturing | 2026 |
| Foscari Limited | Construction | 2005 |
| Foster & Co Developments Ltd | Real estate | 2026 |
| Found Ambition Ltd | Wholesale & retail | 2021 |
| Fowey Pilots Limited | Transport & logistics | 2012 |
| FPD Property Ltd | Construction | 2025 |
| Francis Antony Limited | Administrative & support | 1953 |
| Frond Design Limited | Professional & scientific | 2019 |
| Frontline Total Security Ltd | Administrative & support | 2011 |
| Frost Builders (SW) Limited | Construction | 2016 |
| Full Strength Care Ltd | Health & social care | 2025 |
| Future-Form Holding Ltd | Financial services | 2021 |
| G T Jones (1944) Ltd | Manufacturing | 2013 |
| G&H Motor Repairs Ltd | Wholesale & retail | 2025 |
| GA Building Consultants Limited | Professional & scientific | 2019 |
| Gabriel Fitness Ltd | Arts & recreation | 2025 |
| Gabvic Pharm Ltd | Wholesale & retail | 2023 |
| Gainsborough Park Homes Ltd | Administrative & support | 2017 |
| Gala Management Services Ltd | Professional & scientific | 2002 |
| Galaxis Consortium Limited | Professional & scientific | 2000 |
| Ganbarou Trading Limited | Wholesale & retail | 2019 |
| Garage Vitals Ltd | Information & communication | 2020 |
| Gareth Powell Management Services Limited | Other services | 2018 |
| Gatehouse 1 Management Company Limited | Households | 2021 |
| Gbrs Holdings Ltd | Real estate | 2023 |
| GC Trading Ltd | Information & communication | 2012 |
| GEO Drilling Consultants Limited | Construction | 2013 |
| Geoff HAM Tree Services Ltd | Agriculture & fishing | 2018 |
| Geoffs Properties and Development Ltd | Real estate | 2025 |
| George UK Enterprises Limited | Real estate | 2018 |
| Getty Venture Capital Ltd | Administrative & support | 2019 |
| GFS Craft Materials Ltd | Wholesale & retail | 2018 |
| GFS Knife Supplies Ltd | Wholesale & retail | 2024 |
| Ghakin Tattoo Ltd | Arts & recreation | 2023 |
| Gilbert and Goode Limited | Construction | 1972 |
| GKO Logistics Ltd | Transport & logistics | 2026 |
| Glace Perranporth Ltd | Hospitality | 2025 |
| Glen's Janitorial Services Ltd | Administrative & support | 2025 |
| Global Compliance Management Services Limited | Real estate | 2011 |
| Glowskinbytamara Limited | Other services | 2024 |
| Go Forward (UK ) Ltd | Professional & scientific | 2010 |
| Go Jute Ltd | Wholesale & retail | 2006 |
| Go! ST Austell Shopmobility | Other services | 2010 |
| Gold Roofing Cornwall Limited | Construction | 2017 |
| Goldleaf Recruitment Limited | Administrative & support | 2009 |
| Goldmoney Vault (UK) Ltd | Information & communication | 2021 |
| Goldstar Garages Limited | Wholesale & retail | 2021 |
| Good HQ Limited | Information & communication | 2009 |
| Goodfest Cornwall CIC | Administrative & support | 2022 |
| Goonvean Electronics Limited | Manufacturing | 1982 |
| Gorran and District Community BUS Association Limited | Transport & logistics | 2000 |
| Gorran Haven Car Service Ltd | Transport & logistics | 2023 |
| Goss Moor Building and Carpentry Ltd | Construction | 2023 |
| Gothers Moor Fabrication Ltd | Manufacturing | 2025 |
| Gover Green Space CIC | Wholesale & retail | 2020 |
| Graham Barker Roofing Services Limited | Construction | 2010 |
| Graham Robins Body Repairs Ltd | Wholesale & retail | 2023 |
| Graze TOO Limited | Hospitality | 2011 |
| Great Western Beach (Newquay) Limited | Hospitality | 2016 |
| Green Parts Direct Limited | Wholesale & retail | 2018 |
| Green Wave Cornwall Community Interest Company | Health & social care | 2019 |
| Greenhill Design Limited | Manufacturing | 2017 |
| Greystone EDU Ltd | Education | 2018 |
| Gripsure Property Ltd | Real estate | 2026 |
| Groundswell Holdings Limited | Financial services | 2022 |
| Gulland Park Limited | Hospitality | 2021 |
| Gurkha to Go Ltd | Hospitality | 2024 |
| GVH (Lanhydrock) Ltd | Financial services | 2017 |
| H Construction (Cornwall) Limited | Construction | 2015 |
| H Developments (Cornwall) Limited | Real estate | 2014 |
| Haadzee Inc Ltd | Real estate | 2025 |
| Habilis Health and Safety Solutions Limited | Professional & scientific | 2003 |
| Hair by Rachael Ltd | Other services | 2026 |
| Hallew Consulting Ltd | Professional & scientific | 2021 |
| Hamberg Professional Services Ltd | Professional & scientific | 2019 |
| Hamilton Cornwall Ltd | Other services | 2025 |
| Hampshire Management Limited | Wholesale & retail | 2015 |
| Harayes Limited | Construction | 2023 |
| Harben Park Motors Ltd | Wholesale & retail | 2025 |
| Harbour 1957 Limited | Extraterritorial | 2014 |
| Harbour Housing Services Ltd. | Health & social care | 2016 |
| Hargrey Construction Solutions Ltd | Construction | 2024 |
| Harpr Surveyors Ltd | Professional & scientific | 2018 |
| Harrowe Homes Limited | Construction | 2019 |
| Haus of South Ltd | Professional & scientific | 2026 |
| Haven Consult Ltd | Professional & scientific | 2023 |
| Hawkes Motors Limited | Wholesale & retail | 2024 |
| Hayley's Funerals Limited | Other services | 2024 |
| HCH (Lanhydrock) Ltd | Financial services | 2017 |
| HE DEV Ltd | Information & communication | 2022 |
| Healthtech Publishing & Events Limited | Information & communication | 2018 |
| Heart of Kernow Holidays Ltd | Hospitality | 2020 |
| Hebron Properties Limited | Real estate | 2025 |
| Hello Cornwall Hampers Limited | Extraterritorial | 2020 |