| Flowers Financial Ltd | Financial services | 2023 |
| Fluxa Energy Storage Limited | Professional & scientific | 2025 |
| Flying Parrott Ltd | Construction | 2025 |
| Fmcg Marketing Solutions Ltd | Professional & scientific | 2024 |
| Fonedomz Limited | Wholesale & retail | 2004 |
| Fonf Limited | Construction | 2007 |
| Fools and Horses Ltd | Manufacturing | 2015 |
| Foresight Associates Ltd | Administrative & support | 2008 |
| Forest Edge Holdings Limited | Real estate | 2020 |
| Forest Gate Property Management Limited | Real estate | 2006 |
| Formation Space Ltd | Construction | 2019 |
| Forscott Limited | Real estate | 2023 |
| Fortgate Estates Ltd | Real estate | 2023 |
| Fortus Recruitment Group Limited | Administrative & support | 2022 |
| Foundry (UK) Limited | Wholesale & retail | 2008 |
| Four Square Healthcare Limited | Wholesale & retail | 2014 |
| Fourohs Global Resources Limited | Professional & scientific | 2007 |
| Fourohs Property Group Limited | Real estate | 2019 |
| Fraden Contracts Limited | Construction | 1992 |
| Fraden Roofing Limited | Construction | 2019 |
| Frame Solutions Limited | Information & communication | 2020 |
| Frank G. Fisher Group of Companies Limited | Construction | 1974 |
| Freckle Music Limited | Information & communication | 2017 |
| Freds Kids Limited | Education | 2022 |
| Freshbake Bagel Limited | Hospitality | 2009 |
| Frost & FRY Global Ltd | Administrative & support | 2025 |
| Fulbourne Limited | Construction | 2020 |
| Fully Stacked Limited | Information & communication | 2026 |
| Fusion Creative Studio Limited | Extraterritorial | 2020 |
| FXR1 Limited | Information & communication | 2006 |
| G M Marketing Ltd | Administrative & support | 2026 |
| G.C. Johnson Limited | Wholesale & retail | 1997 |
| G.O.A.T. London Beauty Limited | Other services | 2019 |
| Galacroft Floors Ltd | Construction | 2019 |
| Gareth Owen Limited | Other services | 2016 |
| Gaughan Services Ltd | Construction | 2016 |
| GB Pro Maintenance Ltd | Administrative & support | 2020 |
| GD Trading Limited | Wholesale & retail | 2026 |
| Geddes Events Ltd | Arts & recreation | 2022 |
| Geoff Pearce Consultancy Ltd | Real estate | 2022 |
| George's Injection Pumps Limited | Other services | 1965 |
| Geosom Property Investments Limited | Real estate | 2006 |
| Gerti's Coffee Shop Ltd | Hospitality | 2025 |
| GG PR Ltd | Professional & scientific | 2022 |
| Ghausia Construction Ltd | Construction | 2018 |
| Ghousia Limited | Real estate | 2014 |
| Gigis Investments Limited | Hospitality | 2021 |
| Gills Construction Ltd | Construction | 2020 |
| Giraffes on Tour Ltd | Wholesale & retail | 2022 |
| Glendeck Limited | Construction | 2017 |
| GLO Fulham Limited | Wholesale & retail | 2021 |
| GLO Getters of Essex Ltd | Other services | 2025 |
| GLO Wandsworth Ltd | Other services | 2025 |
| Global Advice Limited | Professional & scientific | 2013 |
| Global Assist Ltd | Administrative & support | 2012 |
| Global Cargo Services London Limited | Transport & logistics | 2004 |
| Global Complete Solutions Limited | Manufacturing | 2012 |
| Global Data Innovations Limited | Information & communication | 2021 |
| Global Diamond Brokers Limited | Wholesale & retail | 2019 |
| Glow Management Services Ltd | Extraterritorial | 2022 |
| Glowcopy Limited | Real estate | 1991 |
| Go 2 Locums Ltd | Administrative & support | 2022 |
| Gold Section Investments LLP | | 2016 |
| Golden Horus Ltd | Health & social care | 2010 |
| Goldeneye Services Limited | Transport & logistics | 2018 |
| Goldstein Heather Architecture Ltd | Professional & scientific | 2018 |
| Good Online Ltd | Wholesale & retail | 2024 |
| Good Vibes Only Talent Limited | Professional & scientific | 2021 |
| Goodmayes Road Management Company Limited | Households | 1995 |
| Gordhan Associates Ltd | Information & communication | 2013 |
| GOS Plumbing and Heating Ltd | Construction | 2023 |
| Graffinity Ltd | Professional & scientific | 2024 |
| Grafton House Group Limited | Construction | 2017 |
| Grainger Place Limited | Construction | 2021 |
| Grand Building Services Ltd | Construction | 2015 |
| Grange Investment Portfolio Ltd | Real estate | 2019 |
| Grange Physio Ltd | Health & social care | 2018 |
| Grange Property Portfolio Ltd | Real estate | 2019 |
| Great Ltd | Administrative & support | 2023 |
| Green Globe Insulations Ltd | Construction | 2025 |
| Green Listing Ltd | Other services | 2017 |
| Green Olive Homes Ltd | Real estate | 2024 |
| Greenestone Ltd | Construction | 2026 |
| Greensparrow Solutions Limited | Information & communication | 2025 |
| Greenstone Research Ltd | Professional & scientific | 2020 |
| Greenway Asset Management Limited | Real estate | 2021 |
| Grespi Ltd | Health & social care | 2000 |
| Grid&Glide Ltd | Information & communication | 2026 |
| Grosvenor Avenue LLP | | 2014 |
| Growing Concerns Garden Centre Ltd | Wholesale & retail | 2024 |
| GT Capital Invest Holdings Ltd | Financial services | 2022 |
| GTS Estates Limited | Real estate | 2020 |
| GTS Properties Investments Ltd | Real estate | 2017 |
| Guardian Parking Services Limited | Administrative & support | 2026 |
| Guardtec Events and Security UK Ltd | Administrative & support | 2025 |
| Guardtec Security and Patrol UK Ltd | Administrative & support | 2020 |
| GUL Cafe Limited | Hospitality | 2024 |
| GUY James Theatrical Limited | Arts & recreation | 2016 |
| GVG Consultant Ltd | Education | 2024 |
| GVG Property Ltd | Households | 2024 |