| FOX N13 Limited | Real estate | 2021 |
| Foxlark Strategy Limited | Professional & scientific | 2018 |
| Foxrock Consulting Ltd | Information & communication | 2017 |
| FPS UK Services Limited | Professional & scientific | 2009 |
| Fractional Ledger Ltd | Professional & scientific | 2026 |
| Frame Direct Ltd | Wholesale & retail | 2025 |
| Frames of Twickenham Limited | Manufacturing | 2013 |
| Frances Darroch Ltd | Information & communication | 2015 |
| Francesca OC Ltd | Professional & scientific | 2024 |
| Francis H. Newman (Shipyards) Limited | Manufacturing | 1954 |
| Frank Dale Ltd | Wholesale & retail | 2021 |
| Frank Edward Haley Limited | Extraterritorial | 2025 |
| Frank Finn Plumbing Limited | Construction | 2013 |
| Freckle Films Ltd | Information & communication | 2020 |
| Fred&Co Ltd | Professional & scientific | 2010 |
| Freestone Advisory Limited | Professional & scientific | 2024 |
| Freight Bulk Ltd | Transport & logistics | 2020 |
| Freight Bulk Properties Ltd | Real estate | 2023 |
| Frequentis (UK) Limited | Information & communication | 1992 |
| Fresh and Co Grocer Limited | Wholesale & retail | 2026 |
| Freshnex Limited | Transport & logistics | 2015 |
| Fresshh Ltd | Wholesale & retail | 2025 |
| Freysets Property Co. Limited | Real estate | 1962 |
| Friends of the River Crane Environment (Force) | Other services | 2013 |
| Frizzenti Limited | Wholesale & retail | 2013 |
| Frog & Roast Beef Films Limited | Information & communication | 2014 |
| From My Travels Ltd | Wholesale & retail | 2026 |
| FS Investment Property Limited | Real estate | 2017 |
| FS Regulatory Consultants Limited | Professional & scientific | 2019 |
| FSG Estate Agent Limited | Real estate | 2025 |
| Fukang Takeaway Ltd | Hospitality | 2022 |
| Fulfilling Potential Ltd | Health & social care | 2011 |
| Fullar Limited | Information & communication | 2007 |
| Fullstack Consultancy Limited | Information & communication | 2022 |
| Fulwood Media Ltd | Professional & scientific | 2020 |
| Fung's K Ltd | Hospitality | 2024 |
| Furzey Lodge Ltd | Professional & scientific | 2021 |
| Fusion Insight Services Ltd | Professional & scientific | 2013 |
| Fusionfindsmarketplace Ltd | Wholesale & retail | 2024 |
| Futura Coaching Consultancy Limited | Professional & scientific | 2013 |
| Future Form Sports Performance Ltd | Education | 2025 |
| Future Properties Ltd | Real estate | 2025 |
| Futureloom Limited | Information & communication | 2024 |
| G Partners Property Ltd | Financial services | 2017 |
| G Post Ltd | Information & communication | 2012 |
| G S B Plumbing & Heating Solutions Ltd | Construction | 2015 |
| G2E Consulting Limited | Professional & scientific | 2012 |
| G2M Partners Ltd | Wholesale & retail | 2019 |
| Gabrie Ltd | Wholesale & retail | 2025 |
| Gadgets and Vapes Limited | Wholesale & retail | 2018 |
| Gadgets Repair Ltd | Wholesale & retail | 2019 |
| Gainsboro Partners Limited | Professional & scientific | 2024 |
| Gainsbourg Limited | Professional & scientific | 2010 |
| Gala Interiors Ltd | Wholesale & retail | 2017 |
| Galactico Immersive Ltd | Professional & scientific | 2022 |
| Galaxy Crash Repair Limited | Wholesale & retail | 2024 |
| Gale House Management Company Limited | Households | 2005 |
| Gallant Marketing Communications Ltd | Professional & scientific | 2009 |
| Gallery Court Freehold Limited | Professional & scientific | 2006 |
| Gallo Pinto Limited | Professional & scientific | 2021 |
| Gambuzzi Property LLP | | 2021 |
| Game Theory Ltd | Other services | 2013 |
| Gameday Retail Ltd | Professional & scientific | 2025 |
| Gamesmart CIC | Education | 2025 |
| Gamma Programme Solutions Ltd | Professional & scientific | 2011 |
| Garden Restorations Ltd | Administrative & support | 2024 |
| Garden Revamp Company Ltd | Administrative & support | 2019 |
| Garnut Limited | Construction | 2024 |
| Garrett Group Ltd | Information & communication | 2016 |
| GAS Air Express Limited | Information & communication | 1987 |
| GAS and Sparks Ltd. | Energy | 2017 |
| Gascoine Hoare Limited | Financial services | 2010 |
| Gascoine Hoare Properties Limited | Real estate | 2016 |
| Gasconsult Limited | Mining & quarrying | 2000 |
| GB Law Chambers Ltd | Professional & scientific | 2011 |
| GBM Business Resources Limited | Administrative & support | 2022 |
| GBM Limited | Professional & scientific | 2001 |
| GBM Minerals Limited | Professional & scientific | 2019 |
| GBM Projects Limited | Professional & scientific | 1997 |
| Gbwr Trading Limited | Arts & recreation | 2014 |
| Gcabrera Development Limited | Information & communication | 2014 |
| GCC (UK) Limited | Real estate | 2011 |
| Gcse Online Courses Ltd | Education | 2021 |
| Gdcconsultancy Ltd | Construction | 2024 |
| Geca Brothers Ltd | Construction | 2018 |
| Geek Vintique Ltd | Wholesale & retail | 2012 |
| Gemini AI Solutions Limited | Information & communication | 2026 |
| Geminus Business Consulting Ltd. | Professional & scientific | 2016 |
| Gemma Greaves Ltd | Professional & scientific | 2011 |
| Generation Football (North West) Limited | Arts & recreation | 2025 |
| Generation Football Ltd | Arts & recreation | 2022 |
| Generational Property Holdings Ltd | Real estate | 2026 |
| Gents Barber Ltd | Other services | 2013 |
| Geokit Creations Ltd | Wholesale & retail | 2023 |
| George Wilson Metering Limited | Manufacturing | 2024 |
| Getting IT Together Ltd. | Construction | 2002 |
| GG Digital Solutions Ltd. | Information & communication | 2016 |
| GH Mountain Guiding Ltd | Administrative & support | 2025 |
| GHD Contracting Ltd | Construction | 2015 |
| Gifhorn Associates Ltd | Other services | 2014 |