| Fernie (Asphalters) Limited | Construction | 1978 |
| Fete Event Productions Ltd | Administrative & support | 2025 |
| Fibonacci Technology Ltd | Professional & scientific | 2020 |
| Filo Analytics Ltd | Information & communication | 2024 |
| Findparkpay Ltd | Information & communication | 2021 |
| Fine Consult Limited | Real estate | 1977 |
| Fine Family Investments Limited | Financial services | 2022 |
| Fine Line Finishing Ltd | Agriculture & fishing | 2019 |
| Finecompany Limited | Professional & scientific | 2015 |
| Fireside International Ltd | Administrative & support | 2025 |
| First AID South West Limited | Health & social care | 2020 |
| First Call Care Solutions Limited | Professional & scientific | 2014 |
| First Call Education Solutions Ltd | Education | 2025 |
| Fish Fuel Ltd | Extraterritorial | 2023 |
| Fistral Consulting Ltd | Administrative & support | 2017 |
| Five Turnings Limited | Administrative & support | 2020 |
| FIX and Flourish (Falmouth) CIC | Administrative & support | 2025 |
| Flower Forklift Loader Ltd | Manufacturing | 2021 |
| Flushing Village Club Limited | Other services | 2011 |
| FMP Limited | Manufacturing | 2018 |
| Fone & Repair Ltd | Wholesale & retail | 2024 |
| Forestpathways CIC | Education | 2019 |
| Forever Cornwall Limited | Administrative & support | 2012 |
| Fortitude Spirits Group Limited | Financial services | 2023 |
| Fortitude Spirits Limited | Wholesale & retail | 2024 |
| FQ Studios Ltd | Information & communication | 2025 |
| Fraud and Financial Crime Consulting Limited | Administrative & support | 2017 |
| Frederick Augustus Limited | Professional & scientific | 2023 |
| Freeboard Consulting Limited | Professional & scientific | 2021 |
| Freefall Dance CIC | Arts & recreation | 2020 |
| Freeriders Limited | Wholesale & retail | 2001 |
| Fresh & Delivered Ltd | Hospitality | 2021 |
| Freshdent Ltd | Health & social care | 2021 |
| Fridaygirl.Com Limited | Administrative & support | 2000 |
| Friman Consulting Limited | Information & communication | 2026 |
| Frog Design Ltd | Information & communication | 2026 |
| Froghopper Ltd | Professional & scientific | 2017 |
| Fuel Link Limited | Information & communication | 2005 |
| Fuel Specialist Services (South West) Limited | Water & waste | 2018 |
| Fuseright Limited | Professional & scientific | 2002 |
| Future Commerce Ltd | Wholesale & retail | 2015 |
| Future Tree Services Ltd | Agriculture & fishing | 2022 |
| Futureproof Cornwall Ltd | Professional & scientific | 2020 |
| Futureproof Southwest Ltd | Information & communication | 2025 |
| G Measures Ltd | Professional & scientific | 2026 |
| Gaffers and Luggers Limited | Construction | 2022 |
| Garden Offices Cornwall Limited | Construction | 2026 |
| Gary Stuart Limited | Extraterritorial | 2025 |
| Gavin Brown Building Limited | Construction | 2015 |
| Gbct Limited | Professional & scientific | 2024 |
| GDP Marine Inspections Ltd | Manufacturing | 2024 |
| Gefion Restaurants Ltd | Hospitality | 2023 |
| General Clothing Stores Limited | Extraterritorial | 2000 |
| GEO Cornwall Limited | Other services | 1987 |
| Geocrop Developments Ltd | Professional & scientific | 2023 |
| George Robinson Kitchens Limited | Construction | 2013 |
| Georgia's Voice Community Interest Company | Health & social care | 2024 |
| Geoscience Limited | Professional & scientific | 1985 |
| Gett Them Ltd | Information & communication | 2024 |
| Gilbert Geotechnics Ltd | Professional & scientific | 2023 |
| Glas Falmouth Ltd | Hospitality | 2025 |
| Glasney College Ltd | Construction | 2003 |
| Glass Twin Limited | Information & communication | 2016 |
| Globull Maritime Consultancy Limited | Professional & scientific | 2026 |
| Glootie Ltd | Information & communication | 2020 |
| Gmcoronatus Limited | Hospitality | 2025 |
| Godrevy Court Management Limited | Households | 1984 |
| Gold Square Ltd | Administrative & support | 2019 |
| Good Space Kernow Ltd | Real estate | 2022 |
| Gouldini Holdings Limited | Other services | 2022 |
| Gouldwin Investments Ltd | Real estate | 2024 |
| Grangeport Limited | Real estate | 2002 |
| Grasp the Nettle Films Ltd | Information & communication | 2015 |
| Great Gardens of Cornwall Limited | Other services | 1995 |
| Great Scores Limited | Wholesale & retail | 2004 |
| Greatips Limited | Agriculture & fishing | 1965 |
| Greatwood Flats Management Company Limited | Households | 1981 |
| Green Image Trustees Limited | Administrative & support | 2024 |
| Green Stars Prosperous Limited | Wholesale & retail | 2017 |
| Green Welly Gardening Services Ltd | Administrative & support | 2019 |
| Greenham Women Everywhere CIC | Education | 2020 |
| Greenside Tree Services Ltd | Agriculture & fishing | 2023 |
| Grove Hill House (Falmouth) Limited | Households | 1960 |
| Grow & CUT Garden Services Ltd | Administrative & support | 2017 |
| Grow Kernow Ltd | Information & communication | 2024 |
| GUM & Glue Ltd | Arts & recreation | 2007 |
| GUY English Books Ltd | Wholesale & retail | 2024 |
| GUY Mcdonald Rigging Ltd | Professional & scientific | 2016 |
| Gweilo Limited | Professional & scientific | 2012 |
| Gwelavon Holdings Ltd | Real estate | 2019 |
| Gwella Dairy Ltd | Manufacturing | 2022 |
| Gwithva Ltd | Manufacturing | 2018 |
| Gyllyng Hall Management Company Limited | Households | 1996 |
| H & a Recycling Limited | Real estate | 2011 |
| H. GEO Limited | Professional & scientific | 2021 |
| Haggard Badger Ltd | Households | 2025 |
| Haides Property Limited | Real estate | 2025 |
| Halladay's Ltd | Professional & scientific | 2005 |
| Hamilton Legg Consulting Ltd | Administrative & support | 2013 |
| Hamilton Work Limited | Education | 2022 |