| Firangidhaba Ltd | Health & social care | 2020 |
| Firebird & Bluebird Firework Displays & Entertainments (UK) Limited | Arts & recreation | 1997 |
| First Anugraha Jewellers Ltd | Wholesale & retail | 2025 |
| First Avondale Residents Association Limited | Households | 1978 |
| First Needs Healthcare (Recruitment) Limited | Education | 2017 |
| First Needs Holdings Ltd | Financial services | 2022 |
| First Needs Training Services Limited | Education | 2023 |
| Fish 4 Trials Limited | Extraterritorial | 1997 |
| Fish Mini Market Ltd | Wholesale & retail | 2023 |
| Fit Kids, Healthy Minds Ltd | Arts & recreation | 2022 |
| Five Acres Kennels Ltd | Other services | 2007 |
| Fivecubed Limited | Information & communication | 2019 |
| FIX3D Ltd | Manufacturing | 2023 |
| Flairz Limited | Administrative & support | 2024 |
| Flame International | Other services | 2021 |
| Flavour Point Ltd | Hospitality | 2026 |
| Flecktec Ltd | Professional & scientific | 2023 |
| Fleet Commercial Property Ltd | Construction | 2023 |
| Fleet Scaffolding Ltd | Construction | 2020 |
| Fleetbarbers Ltd | Other services | 2010 |
| Fleetspeed Commercial Coachworks Ltd | Professional & scientific | 2017 |
| Fleming & Associates Ltd | Professional & scientific | 2020 |
| Flexitrade Roofing Limited | Construction | 2025 |
| Flood and Drainage Consulting Limited | Professional & scientific | 2015 |
| Fluffy Felix Furs Ltd | Manufacturing | 2025 |
| Flying Changes Mindset Ltd | Education | 2021 |
| Flyover Ltd | Transport & logistics | 2021 |
| FMC Marketing Limited | Wholesale & retail | 2003 |
| Fogarty Brothers Limited | Real estate | 1976 |
| Fogarty Group Limited | Administrative & support | 1977 |
| Fone Station Ltd | Other services | 2019 |
| Foneunits Limited | Wholesale & retail | 2012 |
| Foods BG Ltd | Transport & logistics | 2015 |
| Forage&Flow Ltd | Wholesale & retail | 2025 |
| Forest Care Limited | Health & social care | 1984 |
| FOREX4GURU Ltd | Extraterritorial | 2012 |
| Formtec Ltd | Manufacturing | 2023 |
| Forrester Real Estates Limited | Real estate | 2023 |
| Fortune Dream Private Limited | Hospitality | 2023 |
| Four Seasons Plumbing & Heating Ltd | Construction | 2019 |
| Foursquare Property Group Limited | Real estate | 2021 |
| FOX and Poodle PUB Company Ltd | Hospitality | 2024 |
| FOX Brown Projects Ltd | Construction | 2026 |
| Foxburrow Developments and Building Services Ltd | Construction | 2011 |
| Foyaelectrical Ltd | Manufacturing | 2016 |
| FPL Signs Limited | Extraterritorial | 2018 |
| Fpluk Ltd | Extraterritorial | 2014 |
| Framework Accountants Ltd | Professional & scientific | 2023 |
| Frankell Consult and Services Limited | Real estate | 2017 |
| Fraser Gates Ltd | Manufacturing | 2024 |
| FRB Ghale Property Ltd | Real estate | 2025 |
| Freedom Advisory UN Limited | Professional & scientific | 2025 |
| Freight Products Ltd | Extraterritorial | 2014 |
| Friends of Great Hope Children's Home Ltd | Health & social care | 2025 |
| Friendship Hair and Beauty Services Limited | Other services | 2019 |
| Friendsinc. Ltd | Information & communication | 2025 |
| Frimley Pits Fishery Limited | Agriculture & fishing | 2012 |
| Frosta Limited | Health & social care | 2022 |
| FRV Protection Ltd | Administrative & support | 2025 |
| Future Virtual Ltd | Information & communication | 2021 |
| Futuretec Industries Ltd | Professional & scientific | 2024 |
| FYD Property Limited | Financial services | 2023 |
| G & D Brothers Ltd | Wholesale & retail | 2023 |
| G & J Heating & Cooling Ltd | Wholesale & retail | 2022 |
| G 4 Tyres & Wheels Ltd | Wholesale & retail | 2024 |
| G B Asset Investments Limited | Real estate | 2017 |
| G B Builders Ltd | Construction | 2013 |
| G Force Autocare Ltd | Wholesale & retail | 2023 |
| G Force Autos Ltd | Wholesale & retail | 2023 |
| G Force Chain Ltd | Other services | 2019 |
| G Force Estate Ltd | Real estate | 2024 |
| G Force Garages Ltd | Wholesale & retail | 2021 |
| G Force Tyres Ltd | Wholesale & retail | 2017 |
| G Sharu Construction Limited | Financial services | 2016 |
| G W Jones Analytics Ltd | Information & communication | 2024 |
| G&K International Education Consultant Ltd | Education | 2026 |
| GA Telecoms Limited | Construction | 2022 |
| Gaba Distributions Ltd | Transport & logistics | 2023 |
| Gabson Healthcare Ltd | Public administration | 2022 |
| Gadget and Vape Ltd | Wholesale & retail | 2023 |
| Gagan Food Limited | Hospitality | 2021 |
| Galaxy Care Staffing Ltd | Administrative & support | 2020 |
| Galaxy Care Training Ltd | Education | 2023 |
| Gallantry Health Solutions Ltd | Health & social care | 2020 |
| Gallantry Holdings Ltd | Professional & scientific | 2015 |
| Gallantry Security Solutions Ltd | Administrative & support | 2023 |
| Galleon Corporation Ltd | Professional & scientific | 2011 |
| Gammm Consulting Ltd | Information & communication | 2019 |
| GAN BEI Ltd | Hospitality | 2017 |
| Ganga Bandari Limited | Wholesale & retail | 2012 |
| GAP Mortgages Ltd | Financial services | 2026 |
| Gardan Party Limited | Professional & scientific | 1995 |
| Garhwal UKI Ltd | Hospitality | 2024 |
| Garside J Limited | Wholesale & retail | 2020 |
| Gary's Snax Limited | Hospitality | 2009 |
| Gaspro Plumbing and Heating Solutions Ltd | Construction | 2024 |
| Gates-Bennett AC Services Ltd | Construction | 2025 |
| Gateway Development Services Limited | Extraterritorial | 2002 |
| Gateway Security Services (UK) Ltd | Administrative & support | 2014 |
| Gatfield Logistics Limited | Transport & logistics | 2025 |