| French Lodge Management Limited | Real estate | 1997 |
| Frensham Consulting Limited | Professional & scientific | 2023 |
| Frere Shillington Limited | Construction | 2026 |
| Fresh Recruit (Herts) Ltd | Administrative & support | 2015 |
| Freshorizons Ltd | Wholesale & retail | 2017 |
| Friends Green Porsche (Sales) Limited | Wholesale & retail | 2025 |
| Friends Green Porsche Ltd | Wholesale & retail | 2021 |
| Frimley Learning Centre LLP | | 2026 |
| Frogmore Construction Limited | Construction | 2022 |
| Frontier Golf Ltd | Arts & recreation | 2022 |
| Frontier Medical Services Limited | Health & social care | 2024 |
| Frontizo Limited | Financial services | 2026 |
| FS Nexus Ltd | Information & communication | 2026 |
| Fsjm Limited | Construction | 2013 |
| Fuel Nutrition Limited | Hospitality | 2017 |
| Fulfilment Coaching Ltd | Health & social care | 2024 |
| Full Investments Ltd. | Administrative & support | 1994 |
| Full Range Finishing Limited | Construction | 1997 |
| Function.All.Over Ltd | Education | 2025 |
| Fundamentally Children Ltd. | Other services | 2014 |
| Funt Ltd | Other services | 2022 |
| Furniture Republic Limited | Wholesale & retail | 2004 |
| Fussey & Baer Limited | Hospitality | 2018 |
| Future Consulting Ltd | Professional & scientific | 2020 |
| Futuristic Software Ltd | Information & communication | 2013 |
| FV BIO Consulting Ltd | Professional & scientific | 2023 |
| G & H Hamilton Limited | Financial services | 2015 |
| G & L Coatings Limited | Manufacturing | 1996 |
| G Doherty Consultants Company Ltd | Transport & logistics | 2022 |
| G P N Properties Limited | Construction | 2019 |
| G T D Installations Limited | Construction | 2015 |
| G Tamburello Barbers Limited | Other services | 2023 |
| G&C Fratelli Limited | Other services | 2024 |
| G&G Outdoors Limited | Wholesale & retail | 2025 |
| G&H Global Limited | Financial services | 2018 |
| G&L Taylor Properties Limited | Administrative & support | 2017 |
| G&P 17 Limited | Transport & logistics | 2017 |
| G.C. Bricklaying & Building Services Ltd | Construction | 2021 |
| G.W. Morris (UK) Ltd | Construction | 1997 |
| GA Trading Group Ltd | Wholesale & retail | 2026 |
| Gainsford Properties Ltd | Real estate | 2019 |
| Galaxcyspice Limited | Hospitality | 2024 |
| Galley GRP Limited | Manufacturing | 2023 |
| Galliers Services Ltd | Construction | 2022 |
| Gallons Holdings Limited | Financial services | 2021 |
| Gallons Solutions Limited | Real estate | 1990 |
| Game & SON Limited | Construction | 2003 |
| Gamma Controls Limited | Construction | 2025 |
| Gamze & Ciwan Ltd | Hospitality | 2026 |
| Ganesh Management (UK) Ltd | Professional & scientific | 2013 |
| Garden City Paving Limited | Construction | 2018 |
| Garden City Property Group Limited | Real estate | 2022 |
| Garden City Property Rentals Ltd | Real estate | 2021 |
| Gardenwebb Limited | Administrative & support | 2015 |
| Gardiff Epos Limited | Manufacturing | 2013 |
| Gardiff Limited | Information & communication | 2004 |
| Garner Sharnbrook Limited | Construction | 2024 |
| Gary Scott Rigging & Driving Services Limited | Extraterritorial | 2014 |
| Gatcombe Manor Management Company Limited | Households | 2013 |
| Gauge & Compass Ltd | Professional & scientific | 2016 |
| Gawsworth Services Ltd | Administrative & support | 2018 |
| Gazal Hitchin Ltd | Hospitality | 2025 |
| GB Financial Solutions Limited | Financial services | 2021 |
| Gcity Bread Company Ltd | Manufacturing | 2024 |
| GD Mental Health Associates Ltd | Health & social care | 2026 |
| Gearing Locksmiths Ltd | Manufacturing | 2023 |
| GED Dalton Ltd | Arts & recreation | 2011 |
| Geerthan's (UK) Property Ltd | Real estate | 2021 |
| Gekko Production Services Ltd | Administrative & support | 2003 |
| Gembonics Ltd | Wholesale & retail | 2014 |
| Gemstone Contractors Ltd | Construction | 2019 |
| Gemstone Fit OUT Ltd | Construction | 2023 |
| Gemstone Group Ltd | Construction | 2023 |
| Gemstone Ltd | Construction | 2023 |
| GEN Eleven Limited | Professional & scientific | 2015 |
| Gentry Interiors Ltd | Professional & scientific | 2022 |
| Genumed UK Limited | Manufacturing | 2025 |
| Geoff Rose Ltd | Health & social care | 2018 |
| Georgia Willan Ltd | Health & social care | 2025 |
| Georgina Lycett Design Limited | Professional & scientific | 2025 |
| Gerrard and Co Limited | Construction | 2014 |
| Gerry Rose Design Limited | Administrative & support | 2009 |
| Gesti Ltd | Construction | 2012 |
| GET Holed Ltd | Arts & recreation | 2024 |
| Getting Rooted C.I.C. | Hospitality | 2017 |
| Ghoghnoos Property Development Ltd | Real estate | 2021 |
| GHS Traders Ltd | Wholesale & retail | 2025 |
| GHV Consulting Limited | Professional & scientific | 2017 |
| Giacov Limited | Information & communication | 2023 |
| Giago Ltd | Hospitality | 2026 |
| Gianni Frezza Limited | Hospitality | 2011 |
| Gilbert Motorcycles Ltd | Manufacturing | 2017 |
| Gildmark Limited | Real estate | 1979 |
| Gill Mathematics Leamington Spa LLP | | 2026 |
| Gillham Business Solutions Ltd | Information & communication | 2019 |
| Ginger & Thyme Ltd | Hospitality | 2015 |
| Ginger Beer Promotions Ltd | Information & communication | 2011 |
| Ginger Line Designs Limited | Administrative & support | 2019 |
| Ginger Top Recruitment Ltd | Administrative & support | 2018 |
| Ginway Construction Ltd | Construction | 2006 |