| Friends Near ME Limited | Information & communication | 2025 |
| Frogmore Services Ltd | Health & social care | 2022 |
| From the Heart Catering Ltd | Hospitality | 2026 |
| Frontier Fire Doors London Ltd | Public administration | 2026 |
| Frover Limited | Wholesale & retail | 2023 |
| FS Vale Management Limited | Arts & recreation | 2019 |
| Fuel Bites Ltd | Wholesale & retail | 2025 |
| Full Power Construction Ltd | Construction | 2025 |
| Full Power Group Holdings Limited | Financial services | 2025 |
| Full Power Properties Ltd | Real estate | 2024 |
| Full Stack Thinking Ltd | Information & communication | 2020 |
| Fuller Clean Solutions Ltd | Administrative & support | 2026 |
| Funding Services Limited | Financial services | 2024 |
| Fusion Facilities Management Limited | Construction | 2000 |
| Future Digital Footprint UAE Limited | Administrative & support | 2018 |
| Future Digital Footprint USA Limited | Administrative & support | 2018 |
| Future.Ready.People Limited | Professional & scientific | 2024 |
| Futurenova Consulting Limited | Professional & scientific | 2024 |
| Futurnix Solutions Ltd | Information & communication | 2025 |
| Fynix Group Ltd | Construction | 2026 |
| G Bubble Tea Ltd | Hospitality | 2021 |
| G S Buttar Builder Ltd | Construction | 2013 |
| G S Flooring Limited | Construction | 2012 |
| G.B. Brandz Ltd | Wholesale & retail | 2018 |
| G.O.M.D Ltd | Wholesale & retail | 2025 |
| G1 Design Limited | Professional & scientific | 2016 |
| G7 Accountech Consultancy Ltd | Information & communication | 2023 |
| Gabriel's Bakery Ltd | Hospitality | 2026 |
| Galleon Holdings Limited | Financial services | 2021 |
| Gant Property Maintenance Ltd | Construction | 2014 |
| Garage Room Limited | Construction | 2025 |
| Garden Court (Stanmore) Residents Association Limited | Households | 1963 |
| Gary Thornhill Electrical Ltd | Energy | 2019 |
| Gasamet Ltd | Wholesale & retail | 2023 |
| Gaspem Limited | Health & social care | 2009 |
| Gatewick Close Management Company Limited | Households | 1982 |
| Gatineau Beauty Ltd | Wholesale & retail | 2021 |
| Gatineau Skincare (Online) Limited | Wholesale & retail | 2025 |
| Gatineau Skincare Ltd | Wholesale & retail | 2021 |
| Gaulier Advisory Ltd | Administrative & support | 2016 |
| Gaunt Consulting Ltd | Professional & scientific | 2017 |
| Gayle Cole Associates Ltd | Administrative & support | 2016 |
| Gbfc WIN Ltd | Hospitality | 2025 |
| GCD Stone Ltd | Construction | 2022 |
| GDS Electrics Limited | Other services | 2011 |
| Geko Holdings Limited | Real estate | 2024 |
| Gelatium Ltd | Hospitality | 2025 |
| Geldenhuys Limited | Information & communication | 2016 |
| GEM Aesthetics 33 Limited | Other services | 2023 |
| GEM Brand Company Limited | Administrative & support | 2024 |
| GEM Care LAB Ltd | Other services | 2021 |
| GEM Telecommunications Limited | Information & communication | 2014 |
| Genesis Enterprise Group Limited | Wholesale & retail | 2024 |
| Genie Works Ltd | Information & communication | 2025 |
| Geniustwo Limited | Professional & scientific | 2012 |
| Geocass Limited | Professional & scientific | 2011 |
| George Abbott Holdings Ltd | Financial services | 2026 |
| Georgina Online Limited | Administrative & support | 2020 |
| GET in Focus Media Limited | Professional & scientific | 2024 |
| Getallseoservices Limited | Professional & scientific | 2023 |
| Getvocal Ltd | Information & communication | 2026 |
| Gfactorgroup Limited | Real estate | 2024 |
| Gfhm Consulting Limited | Professional & scientific | 2009 |
| Gg's Hospitality Ltd | Hospitality | 2025 |
| GGC Club Classics Ltd | Arts & recreation | 2022 |
| Ghale Healthcare Limited | Wholesale & retail | 2026 |
| Ghaus-E-Yagana Foundation | Other services | 2013 |
| Ghotra Properties Ltd | Real estate | 2020 |
| Giana Insights Ltd | Real estate | 2017 |
| Gilbert and HAU Ltd | Real estate | 2026 |
| Gilbert Scott Court NO 1 Limited | Households | 2012 |
| Gilbey Wine and Food Company Limited(The) | Hospitality | 1974 |
| Gilcon Limited | Construction | 2015 |
| Gildtree Holdings Ltd | Financial services | 2025 |
| Gildtree Ltd | Professional & scientific | 2025 |
| Giles Warren Financial Limited | Financial services | 2004 |
| Ginnys Food Ltd | Hospitality | 2026 |
| Giocor Ltd | Professional & scientific | 2023 |
| Giovanni Rana (UK) Ltd | Hospitality | 2009 |
| Gjgommes OE Consulting Ltd | Professional & scientific | 2020 |
| GK General Building Ltd | Construction | 2022 |
| Gkins Serviced Accommodation Limited | Real estate | 2023 |
| GKS Egham Properties Limited | Real estate | 2013 |
| Glaboo Limited | Professional & scientific | 2015 |
| Glade House (Management) Company Limited | Households | 1985 |
| Gladius Group Ltd | Professional & scientific | 2026 |
| Glam LUX Events Ltd | Arts & recreation | 2019 |
| Glenholme Healthcare Group Limited | Financial services | 2011 |
| Glenholme Property Developments Limited | Construction | 2024 |
| Glenholme Senior Living (Bispham Gardens) Limited | Health & social care | 2019 |
| Glenholme Senior Living (Bispham Holdings) Ltd | Health & social care | 2017 |
| Glenholme Senior Living (Hillcrest) Limited | Real estate | 2024 |
| Glenholme Senior Living (Holdings) Limited | Professional & scientific | 2019 |
| Glenholme Senior Living (Horncastle) Limited | Health & social care | 2020 |
| Glenholme Senior Living (Lincoln) Limited | Health & social care | 2024 |
| Glenholme Senior Living (March) Limited | Health & social care | 2020 |
| Glenholme Senior Living (Sleaford) Limited | Health & social care | 2016 |
| Glenholme Senior Living (Spalding) Limited | Health & social care | 2019 |
| Glenholme Senior Living (Vera James House) Limited | Health & social care | 2020 |
| Glenholme Senior Living (Wordsworth) Ltd | Health & social care | 2024 |