| Freebuffer Ltd | Transport & logistics | 2023 |
| Freedom Creative Limited | Professional & scientific | 2023 |
| Freedom to Shop Ltd | Wholesale & retail | 2019 |
| Freelance Fabrics (Kidlington) Ltd | Wholesale & retail | 1996 |
| Fresh Face Radiance Ltd | Other services | 2018 |
| FRESH3DESIGNS Ltd | Manufacturing | 2024 |
| Freshair UK Limited | Transport & logistics | 2001 |
| Freshcurtain Ltd. | Wholesale & retail | 2012 |
| Friends of Island Pond Wood Ltd | Professional & scientific | 2012 |
| Frimley Green Dental Practice Limited | Health & social care | 2019 |
| From the School Gates Limited | Other services | 2024 |
| Frontier NX Limited | Manufacturing | 2016 |
| FRY Apps Ltd | Information & communication | 2021 |
| FS Engineering & Oilfields Supply Limited | Manufacturing | 2005 |
| FS Engineering Limited | Administrative & support | 2016 |
| FS Integrated Systems Limited | Administrative & support | 2011 |
| Full Circle Ltd. | Information & communication | 2015 |
| Full Circle Synergies Ltd | Real estate | 2021 |
| Fullblaze Limited | Administrative & support | 2014 |
| Fundamentals Childcare Limited | Health & social care | 2017 |
| Funklelou's Limited | Information & communication | 2024 |
| G Brown P & H Limited | Construction | 2016 |
| G Brown Properties Limited | Construction | 2017 |
| G F Holiday Lets Ltd | Hospitality | 2022 |
| G Ford Roofing Ltd | Construction | 2016 |
| G K Sharma Limited | Health & social care | 2020 |
| G Kelly & Sons Plasterers Ltd | Construction | 2015 |
| G Tree Surgery Ltd | Administrative & support | 2026 |
| G&E Property Development Limited | Construction | 2025 |
| G&J Signature Homes Ltd | Real estate | 2025 |
| G.B.C. Industrial Tools Limited | Wholesale & retail | 2014 |
| G.D.T. Fire Alarms Limited | Other services | 1992 |
| G.Fames Enterprise Ltd | Wholesale & retail | 2025 |
| G.W.Cherry Ltd | Transport & logistics | 2026 |
| G5617 Limited | Administrative & support | 2015 |
| GAB Consulting Ltd | Professional & scientific | 2022 |
| Gabion Solutions Limited | Construction | 2007 |
| Gain Business Support Ltd | Administrative & support | 2023 |
| Gain Healthcare Ltd | Health & social care | 2013 |
| Gain Social Housing Ltd | Real estate | 2023 |
| Gallagher Gardens & Landscapes Limited | Administrative & support | 2025 |
| Gallantria Ltd | Health & social care | 2023 |
| Gangart Ltd | Construction | 2019 |
| Gannolex Pavilion Limited | Extraterritorial | 1976 |
| Garfield Electrical Limited | Construction | 2018 |
| Gargash Holdings Limited | Hospitality | 2020 |
| Gargash Manor Hotel Limited | Hospitality | 2020 |
| Garosu Limited | Hospitality | 2026 |
| Garth Park Kitchen Ltd | Hospitality | 2023 |
| Garth Vincent Antiques Limited | Wholesale & retail | 2013 |
| Gastroniche Limited | Hospitality | 2015 |
| Gatehouse Property Ltd | Real estate | 2016 |
| Gateroot Ltd | Construction | 2016 |
| Gauss Technologies Ltd | Professional & scientific | 2017 |
| Gavin Holliday Ltd. | Other services | 2022 |
| Gavray Community Meadows Limited | Arts & recreation | 2023 |
| GB Trans Ltd | Transport & logistics | 2017 |
| GC Facilities Consulting Ltd | Information & communication | 2025 |
| Gclife Limited | Real estate | 2021 |
| GD Network Consulting Limited | Information & communication | 2014 |
| GDJ Consultancy Limited | Professional & scientific | 2022 |
| Gearace Limited | Extraterritorial | 1998 |
| Geddes Bars Limited | Hospitality | 2022 |
| General Equipment Finance Ltd | Financial services | 1999 |
| Gentle Dental Care Chippenham Limited | Health & social care | 2012 |
| Gentle Procedures UK Ltd | Professional & scientific | 2026 |
| Geomap Ltd | Professional & scientific | 2003 |
| Georgie's Lettings Ltd | Real estate | 2024 |
| Gerasch Holdings Limited | Health & social care | 2022 |
| Gerber Estate Limited | Real estate | 2022 |
| Gerber Estate Trading Limited | Real estate | 2022 |
| GET Better Problems Ltd | Administrative & support | 2024 |
| GFL Wilson Investments Ltd | Real estate | 2024 |
| GH Auto Electrical Ltd | Manufacturing | 2013 |
| Ghaf Ltd | Health & social care | 2019 |
| GHK Business Services Ltd | Professional & scientific | 2009 |
| Gibsonday Ltd | Wholesale & retail | 2023 |
| Gilchrist Wellbeing Limited | Health & social care | 2025 |
| Gildon Construction Ltd | Construction | 2019 |
| Gill Energy Solutions Ltd | Professional & scientific | 2026 |
| Gillings Haulage Ltd | Transport & logistics | 2021 |
| Gillins Properties Ltd | Real estate | 2024 |
| Gils Construction Limited | Construction | 2025 |
| Ginger Construction and Landscapes Limited | Construction | 2025 |
| Gj's Vintage Vault Ltd | Wholesale & retail | 2025 |
| GJF Homes Limited | Real estate | 2026 |
| GL Logistics Limited | Transport & logistics | 2015 |
| Gladstone Education Consultancy Limited | Other services | 2013 |
| Gladstone Mews (Hounslow) Management Company Limited | Households | 2001 |
| Glamour Fashion Limited | Wholesale & retail | 2025 |
| Glare Healthcare Ltd | Public administration | 2023 |
| Glebe House Estates Ltd | Real estate | 2025 |
| Gleneldon Limited | Professional & scientific | 1981 |
| Glitol Ltd | Administrative & support | 2023 |
| Global Capital Engineering Ltd | Professional & scientific | 2022 |
| Global Excel Management Europe Limited | Financial services | 1995 |
| Global Impact Bicd Limited | Health & social care | 2018 |
| Global Power Impact Ltd | Manufacturing | 2017 |
| Global Services & Tradings Ltd | Real estate | 2019 |
| Global Source Trading Ltd | Wholesale & retail | 2018 |