| Forrester-Hyde Limited | Financial services | 2007 |
| Fortified IT Ltd | Information & communication | 2009 |
| Fortis Imperium Construction Ltd | Construction | 2026 |
| Fortune & Glory Inc. Ltd | Wholesale & retail | 2019 |
| Fortune 808 Limited | Hospitality | 2025 |
| Fortune Garden YL Limited | Hospitality | 2023 |
| Forty Five Minutes Nude Limited | Wholesale & retail | 2020 |
| Forward Distribution (Kent) Limited | Wholesale & retail | 2025 |
| Fotool Ltd | Information & communication | 2017 |
| Foundry Development Studio Ltd | Construction | 2026 |
| Foundry Lane Properties Limited | Financial services | 1948 |
| FOUR6 Property Development Ltd | Construction | 2021 |
| FOX & Hounds (Ramsden Heath) Ltd | Hospitality | 2017 |
| Foxhall Maintenance Limited | Construction | 2018 |
| Fractured Image Limited | Information & communication | 2007 |
| Francesca Ashcroft Collective Limited | Information & communication | 2026 |
| Francesca Griffin Limited | Professional & scientific | 2018 |
| Francol Management Company Limited | Households | 2003 |
| Frank Halfyard Plastering & Building Ltd | Construction | 2017 |
| Frank Oliver Country Homes Limited | Construction | 2025 |
| Frank Oliver Property Limited | Real estate | 2025 |
| Fraser Electrical Services Limited | Administrative & support | 1999 |
| Fraser Watson Enterprises Limited | Financial services | 2019 |
| Frederick James Ltd | Wholesale & retail | 1998 |
| Fredrose Electrical Services Ltd | Construction | 2024 |
| Freehold & Lease Management Limited | Construction | 2000 |
| Freelance Link Limited | Administrative & support | 2025 |
| Freeman Surveying Services Limited | Professional & scientific | 2015 |
| Freerider Designs Ltd | Professional & scientific | 2020 |
| Freezalink Euro Limited | Wholesale & retail | 1993 |
| Fresco Food Prep Limited | Hospitality | 2019 |
| Fresh Air and Water Treatment Ltd | Administrative & support | 2025 |
| Fresh Heads Mens Grooming Ltd | Other services | 2018 |
| Fresh Property Management (Essex) Ltd | Real estate | 2020 |
| Freshbellek Plumbing & Heating Ltd | Construction | 2020 |
| Freshwater & Anglers Environmental Support Limited | Agriculture & fishing | 2025 |
| Friends and Places Together | Other services | 2013 |
| Frith Studio Limited | Professional & scientific | 2010 |
| FRL Design Holdings Limited | Real estate | 2022 |
| Frogsborne Productions Ltd | Information & communication | 2018 |
| Frontlight Flooring & Pumping Limited | Construction | 2009 |
| Frontline Property Maintenance Ltd | Households | 2024 |
| Frost Bros (Electrical) Limited | Extraterritorial | 2001 |
| Frost Homes (UK) Ltd | Construction | 2010 |
| Fruto DEL Espiritu C.I.C. | Wholesale & retail | 2001 |
| FSC Solutions Ltd | Professional & scientific | 2018 |
| Fsjs Site Services Ltd | Construction | 2019 |
| FT Group Limited | Information & communication | 2016 |
| FTG Contractors Limited | Construction | 2024 |
| FTG Maintenance Limited | Construction | 2024 |
| Fuctifino Limited | Professional & scientific | 2024 |
| Fujimoto Essex Ltd | Hospitality | 2025 |
| FUL Services Ltd | Construction | 2017 |
| Full Circle Feature Films Limited | Information & communication | 2004 |
| Full Communications Limited | Professional & scientific | 2003 |
| Full Spectrum Life Ltd | Health & social care | 2025 |
| Fullgate Limited | Manufacturing | 2001 |
| Fullstrength Solutions Limited | Administrative & support | 2004 |
| FUN Guss Limited | Other services | 2025 |
| Fuse Genie Holdings Limited | Information & communication | 2023 |
| Fuse Genie Limited | Information & communication | 2023 |
| Fusion Finance Sipp Ltd | Financial services | 2023 |
| Fusion Finance Umbrella Ltd | Administrative & support | 2023 |
| Fusion Secure Limited | Administrative & support | 2024 |
| Future BIM Limited | Information & communication | 2017 |
| Future Mondais Ltd | Administrative & support | 2022 |
| FW18 Development Ltd | Construction | 2024 |
| FZQ Solutions Limited | Information & communication | 2020 |
| G & a Consulting Limited | Information & communication | 2000 |
| G & K Drywall Limited | Construction | 2015 |
| G & S Carpentry Limited | Administrative & support | 2009 |
| G Bates Roofing Ltd | Construction | 2016 |
| G C (Essex) Limited | Real estate | 2021 |
| G Coombes Ltd | Administrative & support | 2007 |
| G Harrold Building Services Ltd | Construction | 2005 |
| G Scott Gems Limited | Administrative & support | 2012 |
| G&F Prime Rentals Limited | Administrative & support | 2025 |
| G&Gk 2 Ltd | Hospitality | 2022 |
| G. D. Fabrication Limited | Manufacturing | 2022 |
| G. Jupp Building Services Limited | Construction | 2011 |
| G.J.O. Services Limited | Construction | 2002 |
| G1U1 Properties & Investments Ltd | Real estate | 2024 |
| G9 Property Ltd | Real estate | 2022 |
| GA5 Services Limited | Other services | 2008 |
| Gaba Media & Consultancy Services Ltd | Professional & scientific | 2015 |
| Gabs Grazing Ltd | Hospitality | 2025 |
| Gadget Magic UK Limited | Other services | 2015 |
| GAF Laser Holdings Limited | Financial services | 2019 |
| Gailenever Ltd | Administrative & support | 2011 |
| Gainttech Ltd | Wholesale & retail | 2019 |
| Galaxypalooza Limited | Other services | 2026 |
| Gallivan Limited | Wholesale & retail | 2021 |
| Game on Technologies Ltd | Information & communication | 2021 |
| Gamefrenzy Limited | Information & communication | 2024 |
| Gardening by Jamie Ltd | Professional & scientific | 2020 |
| Gardens by S J Holmes Limited | Administrative & support | 2020 |
| Gardners Home Interiors Limited | Wholesale & retail | 2014 |
| Garegear Ltd | Wholesale & retail | 2023 |
| Gareth a Davies Limited | Other services | 2006 |
| Garj Developments Ltd | Real estate | 2023 |