| Eren Engin Ltd | Real estate | 2020 |
| Esmond Exchange Limited | Real estate | 2011 |
| ETS Truck & Van Limited | Wholesale & retail | 2004 |
| Evaluar Fire Consultancy Ltd | Professional & scientific | 2026 |
| Evans Chemicals Limited | Wholesale & retail | 2010 |
| Evans Falco LLP | | 2010 |
| Exclusive Security Solutions Limited | Administrative & support | 2017 |
| Exgine Limited | Information & communication | 2018 |
| Experience Matters Group CIC | Information & communication | 2026 |
| Experiumtravel Limited | Administrative & support | 2018 |
| Exrgy Ltd | Information & communication | 2024 |
| Fair Meadow Redruth Limited | Hospitality | 2023 |
| Falmouth Facades & Retrofit Ltd | Construction | 2024 |
| Falmouth Removals Ltd | Transport & logistics | 2023 |
| Falmouth Studios Ltd | Manufacturing | 2025 |
| Fanfloww Ltd | Information & communication | 2026 |
| Fastdog Projects Ltd | Professional & scientific | 2018 |
| FC Global Payments Ltd | Financial services | 2023 |
| Fcsw Ltd | Construction | 2026 |
| Feritech Global Ltd | Professional & scientific | 2015 |
| Fermented Threads Limited | Wholesale & retail | 2017 |
| Fernhill Management Company (Carbis Bay) Limited | Households | 2008 |
| Fernlea Court Management Limited | Real estate | 2010 |
| Fibre Hub Ltd | Information & communication | 2025 |
| Fibrecrm Limited | Information & communication | 2007 |
| FIN Culture Ltd | Manufacturing | 2025 |
| Fitwell Flooring Limited | Wholesale & retail | 1986 |
| Five Degrees Eco Ltd | Manufacturing | 2024 |
| Flat 12 Ltd | Wholesale & retail | 2022 |
| Flawless Cleans Ltd | Administrative & support | 2024 |
| Fletcher Way Garage Limited | Real estate | 1964 |
| Floralyn Holdings Limited | Construction | 2021 |
| Flow Heating & Plumbing Ltd | Construction | 2019 |
| Flows and Roads Consulting Ltd | Professional & scientific | 2026 |
| Fluxus Cornwall CIC | Education | 2022 |
| Flying Start Nurseries (SW) Limited | Education | 2010 |
| Focus Technology Europe Limited | Information & communication | 2011 |
| Food for ALL (Cornwall) CIC | Hospitality | 2025 |
| Foralexter Limited | Households | 1999 |
| Fore FUN Entertainment Limited | Arts & recreation | 2021 |
| Fortify Property Services Ltd | Extraterritorial | 2016 |
| Foulkes Consulting and Training Ltd | Professional & scientific | 2024 |
| Foulkes Investments Limited | Real estate | 2018 |
| Foundation for Christian Education | Education | 2004 |
| Four Bobs Holding Limited | Financial services | 2026 |
| Fourcornwall LLP | | 2010 |
| FOX Security & Training Ltd | Administrative & support | 2023 |
| Foxgrove Equestrian Limited | Wholesale & retail | 2023 |
| Frame Homes (South West) Limited | Construction | 1974 |
| Frame Homes Limited | Extraterritorial | 1997 |
| Frame Homes Modular UK Limited | Extraterritorial | 2018 |
| Frame Modular UK Limited | Extraterritorial | 2018 |
| Frame UK Limited | Extraterritorial | 2002 |
| Free Bird Brewing @ Tipsy Trailer Adventures Ltd | Hospitality | 2023 |
| Freedom Signs Ltd | Professional & scientific | 2022 |
| Frewfix Ltd | Construction | 2010 |
| Friends of Moonshadow Ltd | Education | 2025 |
| Friendship Cohousing Limited | Professional & scientific | 2020 |
| Frog Marketing UK Limited | Professional & scientific | 2026 |
| From Trees Ltd | Manufacturing | 2020 |
| Fullman Trading Limited | Health & social care | 2017 |
| Furniss of Cornwall Limited | Manufacturing | 2006 |
| Furniture World Limited | Wholesale & retail | 2003 |
| Furzecroft Nancledra Management Co Ltd | Households | 2016 |
| Future Solutions Cornwall Ltd | Construction | 2023 |
| G J Ruddock Ltd | Transport & logistics | 2024 |
| Gachez Services Ltd | Health & social care | 2023 |
| Gallos Group Ltd | Professional & scientific | 2019 |
| Ganbarou Real Estate Ltd | Real estate | 2020 |
| Gateway Business Centre Limited | Extraterritorial | 2015 |
| Gateway Business Park (Barncoose) Limited | Construction | 2017 |
| Gawcott Fields Community Solar Project C.I.C. | Energy | 2015 |
| GDT Properties Cornwall Limited | Professional & scientific | 2023 |
| Geogen Limited | Construction | 2021 |
| Geothermal Engineering Limited | Energy | 2008 |
| GET SET Glow Ltd | Other services | 2023 |
| GEW Consultants Limited | Professional & scientific | 2026 |
| Gigwagon Ltd | Transport & logistics | 2026 |
| Gill and SON Carpentry Limited | Manufacturing | 2020 |
| GK Audio Visual Ltd | Wholesale & retail | 2021 |
| Glamour Wedding Hair & Beauty Limited | Wholesale & retail | 2024 |
| Glass Enhance Limited | Administrative & support | 2019 |
| Glenn's Fish & Chips Ltd | Hospitality | 2018 |
| Go 2 Cabs Limited | Transport & logistics | 2019 |
| Go Test IT Limited | Professional & scientific | 2006 |
| Go Tripod Ltd | Information & communication | 2009 |
| Goldthorn Property Limited | Real estate | 2021 |
| Good Health Group Limited | Health & social care | 2022 |
| Goongumpus Limited | Extraterritorial | 2014 |
| Gould Electronics Two Way Radio Limited | Information & communication | 1995 |
| GP Assist C.I.C. | Professional & scientific | 2011 |
| GP Supps Ltd | Wholesale & retail | 2025 |
| Graig Fatha CE Turbine Ltd | Energy | 2018 |
| Granito Limited | Real estate | 2019 |
| Grassroots Garden CIC | Agriculture & fishing | 2021 |
| Great Western Accountancy Limited | Professional & scientific | 2014 |
| Green Energy Distributions Ltd | Wholesale & retail | 2023 |
| Green Power Solutions Ltd | Information & communication | 2018 |
| Greenbank House Management Limited | Households | 1985 |
| Greenfingers Contracting Ltd | Administrative & support | 2014 |