| Fort Security Systems Limited | Administrative & support | 2019 |
| Forte Vocal Coaching Ltd | Arts & recreation | 2021 |
| Fostering Safety Ltd | Extraterritorial | 2014 |
| Foundguard Limited | | 1991 |
| Foundry & Nest Limited | Real estate | 2025 |
| Fountainwell Books Limited | Arts & recreation | 2011 |
| Fourbees Consultancy Ltd | Professional & scientific | 2025 |
| Fowler Exterior Cleaning Ltd | Administrative & support | 2025 |
| FOX Heating & Plumbing Ltd | Construction | 2026 |
| FOX Stores Ltd | Wholesale & retail | 2022 |
| Foxway Circular UK Ltd | Wholesale & retail | 2016 |
| FPG Coaching Ltd | Education | 2024 |
| Frams C Ltd | Transport & logistics | 2026 |
| Frances Crain Services Limited | Other services | 2002 |
| Francis Builders Limited | Construction | 2016 |
| Fraudtech.Inevstments Ltd | Financial services | 2025 |
| Fraupow Ltd | Wholesale & retail | 2021 |
| Fred E Smart Ltd | Construction | 2014 |
| Frederick Jonathan Road Sport Ltd | Wholesale & retail | 2020 |
| Free to BE NLP and Coaching Ltd | Administrative & support | 2017 |
| Freedom Accounting and Taxation Ltd | Professional & scientific | 2024 |
| Freemix Concrete Limited | Manufacturing | 2012 |
| Freenet IT Solutions Ltd | Information & communication | 2013 |
| Freeola Limited | Information & communication | 2005 |
| Freewill Powerhouse Ministries | Health & social care | 2018 |
| Freightbrain International Limited | Transport & logistics | 1984 |
| Frenchie's Pizza Ltd | Hospitality | 2024 |
| Fresh IT Solutions Ltd | Information & communication | 2026 |
| Fresh Property Maintenance Ltd | Construction | 2019 |
| Freshco Food Supplies Limited | Wholesale & retail | 2023 |
| Freshscape Ltd | Other services | 2017 |
| Freshton Ltd | Administrative & support | 2026 |
| Freshwell Builders Limited | Construction | 1996 |
| Freshwell Project C.I.C. | Information & communication | 2024 |
| Friends of Braintree Community Hospital | Wholesale & retail | 2010 |
| Front 9 Golf Limited | Arts & recreation | 2025 |
| Front Management Limited | Administrative & support | 2018 |
| FRY Harder Ltd | Hospitality | 2025 |
| FSE Foundry Limited | Manufacturing | 2001 |
| FSE Property Limited | Real estate | 2016 |
| FSL Portess Ltd | Real estate | 2018 |
| Full House Young People Services Ltd | Health & social care | 2025 |
| Fully Fuelled Detailing Ltd | Administrative & support | 2025 |
| Furmx Limited | Hospitality | 2024 |
| Fusion Finishes Ltd | Construction | 2026 |
| Fusion Metalwork Limited | Real estate | 2009 |
| Fusiontech.Clothing Ltd | Wholesale & retail | 2025 |
| Fusiontech.Investments Ltd | Financial services | 2025 |
| Future Air Solutions Limited | Construction | 2015 |
| Future Garment Trims Ltd | Wholesale & retail | 2019 |
| Future Homes Essex Ltd | Construction | 2022 |
| Future TEC Solutions Limited | Information & communication | 2011 |
| Futurecruit Consulting Limited | Administrative & support | 2019 |
| Futureproof Electrical Ltd | Construction | 2026 |
| Fwcp Spark (UK) Midco Limited | Financial services | 2022 |
| Fyfield Associates Limited | Professional & scientific | 2008 |
| G & D Plumbing & Heating Limited | Construction | 1998 |
| G & G Gallo Enterprises Limited | Wholesale & retail | 1995 |
| G & M Loft Conversions Limited | Construction | 2003 |
| G & M Loft Holdings Limited | Professional & scientific | 2016 |
| G E Motors Limited | Wholesale & retail | 2025 |
| G H Motorcycles Limited | Wholesale & retail | 2003 |
| G I S T Holdings Ltd | Other services | 2015 |
| G I S T Initiatives Ltd | Information & communication | 2015 |
| G J English Ltd | Construction | 2015 |
| G Ricketts Consulting Limited | Professional & scientific | 2015 |
| G W Smith Storage Ltd | Construction | 2015 |
| G&J Leisure Limited | Hospitality | 2014 |
| G&N Homes Limited | Real estate | 2026 |
| G-Tech Roofing Ltd | Construction | 2014 |
| G-W-B Solutions Limited | Professional & scientific | 2013 |
| G.C.L. Services (Essex) Limited | Real estate | 2005 |
| G.S.T. Limited | Agriculture & fishing | 1997 |
| G1 Coaching Ltd | Other services | 2025 |
| G1 Interiors Limited | Construction | 2015 |
| GA Services Ltd | Administrative & support | 2025 |
| Galicore Services Limited | Agriculture & fishing | 1996 |
| Galley Roofing Limited | Construction | 2024 |
| GAP (Brookwood) Limited | Construction | 2022 |
| GAP Properties (SE) Limited | Real estate | 2018 |
| Garbot Limited | Construction | 1990 |
| Garden Design Art Ltd | Administrative & support | 2017 |
| Gardhams Limited | Construction | 2005 |
| Garner & Shaw Limited | Manufacturing | 1998 |
| Garrett & SON (Building Services) Limited | Construction | 2012 |
| GAS Safety Medic Ltd | Construction | 2020 |
| Gatehouse Builders Limited | Manufacturing | 2021 |
| Gateway Mortgages Limited | Financial services | 2009 |
| Gateway Residential Sales & Lettings Ltd | Real estate | 2024 |
| Gateway Specialist Lending Ltd | Financial services | 2025 |
| GATEWAY2RECYCLING Limited | Real estate | 2015 |
| Gatring Limited | Financial services | 1993 |
| GB Adaptions Limited | Construction | 2009 |
| GB Lining Services Limited | Construction | 2007 |
| Gclm Codes Ltd | Manufacturing | 2023 |
| GCS Corporation Ltd | Professional & scientific | 2017 |
| GD Road Transport Ltd | Transport & logistics | 2026 |
| Gearmatic UK Ltd | Wholesale & retail | 2018 |
| Geas Advisory Limited | Administrative & support | 2013 |
| GEE Beautea Limited | Other services | 2025 |