| Freedom Artists Limited | Professional & scientific | 2026 |
| Freedom Care 24/7 Ltd | Health & social care | 2019 |
| Freehold Estate Management Ltd | Real estate | 2024 |
| Freehold Management Collections Ltd | Real estate | 2018 |
| Freehold, 379 Sydenham Road, Croydon Ltd | Real estate | 2010 |
| Frequency 3G Distribution Limited | Professional & scientific | 2001 |
| Frequency 3G Telecom Limited | Wholesale & retail | 2001 |
| Fresh Direction Ltd | Professional & scientific | 2024 |
| Fresh Ideas London Ltd | Wholesale & retail | 2015 |
| Freshmount Residents Company Limited | Households | 1970 |
| Friendly Trade Company Ltd | Other services | 2023 |
| Frogz Limited | Professional & scientific | 2005 |
| From Allpoints Ltd | Professional & scientific | 2022 |
| From This Moment Limited | Wholesale & retail | 2006 |
| Frontback Technologies Limited | Information & communication | 2000 |
| Frontline Training Ltd | Education | 2021 |
| FRZ Management Limited | Real estate | 2020 |
| FRZ Sono-Tech Limited | Health & social care | 2012 |
| FS Tech Delivery Solutions Limited | Professional & scientific | 2025 |
| FSS Professional Solutions Limited | Administrative & support | 2026 |
| Fstd Consulting Services (FCS) Limited | Professional & scientific | 2019 |
| FT Roofing and Building Ltd | Construction | 2024 |
| Fuel-Fx Limited | Administrative & support | 2015 |
| Fueldirect Saas Limited | Information & communication | 2025 |
| Fulbourne House (Eastbourne) Limited | Real estate | 2002 |
| Full Solutions Equipment Ltd | Wholesale & retail | 2025 |
| Full Spectrum Media Ltd | Information & communication | 2025 |
| Fuller Construction Limited | Construction | 1984 |
| Fullstopnewparagraph Ltd | Arts & recreation | 2016 |
| Fundamentally Pilates Ltd | Health & social care | 2022 |
| Funk N South Bars Limited | Hospitality | 2023 |
| Furinkazan Hachimitsu Limited | Wholesale & retail | 2026 |
| Furinkazan Keshohin Limited | Wholesale & retail | 2026 |
| Furinkazan Kuruma Limited | Wholesale & retail | 2026 |
| Furkantegin Ltd | Wholesale & retail | 2025 |
| Furniture & Refurbishment Ltd | Wholesale & retail | 2019 |
| Fuse Electrical Group Ltd | Construction | 2023 |
| Future Green Solutions Limited | Education | 2021 |
| Future LUX Consultancy Ltd | Professional & scientific | 2018 |
| Future Works Infrastructure Limited | Construction | 2025 |
| Futured Thought Leadership Ltd | Professional & scientific | 2024 |
| Futureideas.World Limited | Information & communication | 2021 |
| FXD Ltd | Health & social care | 2022 |
| G & H Property Services Ltd | Construction | 2024 |
| G 4 Gardens Limited | Administrative & support | 2011 |
| G Bullen Electrical Limited | Construction | 2003 |
| G C Mallen Consultancy Limited | Administrative & support | 2012 |
| G Chesney Consulting Limited | Professional & scientific | 2026 |
| G Heff Limited | Information & communication | 2017 |
| G J & H K Services Limited | Real estate | 1999 |
| G J Kennedy Electrical Limited | Administrative & support | 1997 |
| G P Cranes Limited | Information & communication | 2010 |
| G S a R Limited | Real estate | 2006 |
| G&S London Ltd | Wholesale & retail | 2020 |
| G-Isbem Limited | Information & communication | 2009 |
| G-Tec Electrical Ltd | Construction | 2004 |
| G-Tec Property Ltd | Real estate | 2016 |
| G.J. Faulkner Limited | Construction | 2012 |
| Gabriela Tattoo Limited | Arts & recreation | 2026 |
| Gain Media Limited | Professional & scientific | 2022 |
| Gainsborough Court(East)Residents Company Limited | Professional & scientific | 1968 |
| Galatai Ltd | Information & communication | 2009 |
| Galileo Engineering Services Limited | Professional & scientific | 2023 |
| Gallery 8 Management Limited | Arts & recreation | 2009 |
| Galois Limited | Information & communication | 2003 |
| Gama UK Limited | Mining & quarrying | 2009 |
| Gamenano Estore Limited | Wholesale & retail | 2009 |
| GAN Landscapes Ltd | Administrative & support | 2018 |
| Ganesha Food & Wine Ltd | Wholesale & retail | 2019 |
| Garage VIP UK Limited | Manufacturing | 2016 |
| Garage VIP UK Racing Team Ltd | Arts & recreation | 2020 |
| Garden Fortress Ltd | Construction | 2014 |
| Gardenbeez Ltd. | Administrative & support | 2025 |
| Gareco Ltd | Information & communication | 2022 |
| Gareth Pritchard Ltd | Professional & scientific | 2010 |
| Garfield Business Advisory Limited | Professional & scientific | 2025 |
| Garners Funeral Service Limited | Other services | 1985 |
| Garuda Solutions Limited | Information & communication | 2016 |
| Gary Sewell Electrical Limited | Construction | 2022 |
| Gasparin UK Ltd | Professional & scientific | 2025 |
| Gasston Stables Limited | Arts & recreation | 2007 |
| Gastrax GAS & Heating Ltd | Construction | 2017 |
| Gatechime Property Management Limited | Households | 1990 |
| Gathy RAY Properties Ltd | Hospitality | 2020 |
| Gatwick Properties Developments Limited | Hospitality | 1989 |
| Gaulds Developments Ltd | Construction | 2017 |
| Gauntlett Boxing Club Limited | Arts & recreation | 2014 |
| Gavin Pearce Architects Limited | Professional & scientific | 2012 |
| Gayatri Technology Ltd | Information & communication | 2023 |
| Gaymorn Investment Co. Limited | Construction | 1963 |
| Gazelle Marketing Limited | Administrative & support | 2012 |
| GB Motors London Limited | Wholesale & retail | 2024 |
| GBD Fitness Ltd | Education | 2024 |
| GC Pump Services Limited | Construction | 2018 |
| Gceh Management Limited | Professional & scientific | 2025 |
| GDM Building Solutions London Ltd | Construction | 2022 |
| GDR Legal Limited | Professional & scientific | 2017 |
| Gemini Developing Ltd | Construction | 2018 |
| Gemini Folk Ltd. | Professional & scientific | 2024 |
| GEN Global Solutions Ltd | Wholesale & retail | 2018 |