| FSU Traders Ltd | Other services | 2023 |
| FTB ITC Services Limited | Information & communication | 2014 |
| FTI Renewable Energy Systems Ltd | Energy | 2025 |
| FTR Collective Ltd | Professional & scientific | 2022 |
| Fuel Group EOT Limited | Administrative & support | 2025 |
| Fuje Art Ltd | Wholesale & retail | 2022 |
| Fulcrum Recovery Project C.I.C. | Health & social care | 2017 |
| Full Facade Specialists Ltd | Construction | 2020 |
| Fulmar Construction Ltd | Construction | 2022 |
| Fulmar Developments Ltd | Professional & scientific | 2021 |
| Fulton Property Group Ltd | Real estate | 2025 |
| Fundraiser in the Room Ltd | Information & communication | 2024 |
| Funny Phonics Limited | Extraterritorial | 2023 |
| Futuranet Ltd | Manufacturing | 2000 |
| Future Pathways Group Limited | Health & social care | 2026 |
| Future Vision Consulting Limited | Professional & scientific | 2015 |
| Futuretek Holdings Limited | Financial services | 2019 |
| Futuristic Design Solutions Limited | Professional & scientific | 1998 |
| Fuzzy Barlow Ltd | Transport & logistics | 2013 |
| FVS Legal Ltd | Professional & scientific | 2017 |
| FWE Development Limited | Professional & scientific | 2023 |
| G & B Electrical Limited | Construction | 2017 |
| G & N Developments Limited | Real estate | 2004 |
| G & P Consulting Limited | Professional & scientific | 2011 |
| G a J Properties Ltd | Real estate | 2025 |
| G a P Day Limited | Other services | 2018 |
| G D & SON Construction Limited | Construction | 2017 |
| G J Martin GAS and Heating Services Ltd | Construction | 2017 |
| G K Entertainment Hub Limited | Information & communication | 2019 |
| G M Timber Constructions Limited | Construction | 2012 |
| G R Repairs Limited | Other services | 2018 |
| G& S Sales Limited | Construction | 2017 |
| G&H Housing Ltd | Real estate | 2021 |
| G&L Talent Ltd | Administrative & support | 2025 |
| G&M Windows Ltd | Construction | 2014 |
| G.D.T Asset Management Limited | Real estate | 2016 |
| Game Corner Limited | Wholesale & retail | 2024 |
| Gamefinity Limited | Arts & recreation | 2024 |
| Games Castle Ltd | Wholesale & retail | 2024 |
| Games DEN Limited | Wholesale & retail | 2016 |
| Gamut Business Consultancy Ltd | Professional & scientific | 2017 |
| Gangar Management Limited | Households | 2016 |
| Garden AID Services Ltd | Administrative & support | 2017 |
| Gardens by Rachel Ltd | Administrative & support | 2023 |
| Gardner Watts Limited | Professional & scientific | 1997 |
| Gareth Wilkinson Services Limited | Administrative & support | 2010 |
| Garrington Autism Assessments Limited | Health & social care | 2023 |
| GAS Water Energy Installations Ltd | Construction | 2026 |
| Gascoigne Engineering Design Ltd | Professional & scientific | 2021 |
| Gatfield & SON Limited | Construction | 2014 |
| Gauntlet Property Services Ltd | Real estate | 2025 |
| Gauntlet Site Services Limited | Construction | 2015 |
| Gautrey Property Ltd | Real estate | 2023 |
| Gavin Aley Consulting Limited | Professional & scientific | 2016 |
| GB Development (Midlands) Ltd | Real estate | 2023 |
| GB Landscaping & Maintenance Limited | Administrative & support | 2021 |
| GBL Software Limited | Information & communication | 2004 |
| GCR Rolling Stock Trust | Administrative & support | 2000 |
| GDK Properties Limited | Real estate | 2003 |
| GDS Light Haulage Warwick Limited | Transport & logistics | 2020 |
| GEE BEE Investments Limited | Construction | 2007 |
| GEM Jewellers Limited | Wholesale & retail | 2012 |
| Gemini Woman Limited | Extraterritorial | 2011 |
| Gemteam Marketing Limited | Wholesale & retail | 2006 |
| General Gemini Ltd | Manufacturing | 2014 |
| General Provisions Limited | Other services | 1998 |
| Genmirage Limited | Information & communication | 2025 |
| Georgia Estates (Leamington Spa) Limited | Real estate | 2020 |
| Georgina Emily Ltd | Other services | 2024 |
| Geowoody Ltd | Professional & scientific | 2025 |
| Geronimo Jones Limited | Wholesale & retail | 2025 |
| Gerrard Stuart Financial Services Limited | Financial services | 1996 |
| Gerrard Stuart Holdings Limited | Professional & scientific | 2000 |
| GET Leadership Limited | Professional & scientific | 2022 |
| GET Tasty Ltd | Information & communication | 2019 |
| Getaway Gurus Ltd | Administrative & support | 2025 |
| GFG Alliance Ltd | Financial services | 2017 |
| GFG Central Services Europe Ltd | Professional & scientific | 2018 |
| GFG Financial Services Ltd | Professional & scientific | 2020 |
| GFG Foundation | Education | 2017 |
| GGN Consulting Ltd | Professional & scientific | 2017 |
| Ggrachletts.Com Ltd | Real estate | 2024 |
| GH Machinery Limited | Professional & scientific | 2015 |
| GH Properties Limited | Real estate | 2011 |
| Ghost Laboratories Limited | Manufacturing | 2017 |
| Ghost Labs Liquids Ltd | Manufacturing | 2021 |
| Ghost Labs Skin Ltd | Manufacturing | 2025 |
| Giblets Limited | Real estate | 2022 |
| Gibraltar Wordworks Limited | Arts & recreation | 2016 |
| Gibson Hance Ltd | Real estate | 2019 |
| Gibsonhaus Limited | Professional & scientific | 2015 |
| Gifted Collective Ltd | Wholesale & retail | 2021 |
| Giggle Gears Limited | Real estate | 2024 |
| Gigsy Limited | Professional & scientific | 2008 |
| Gildas AI Ltd | Information & communication | 2025 |
| Gill UK Property Limited | Real estate | 2018 |
| Gillbert Investments Ltd | Construction | 2018 |
| Gillspire Ltd | Real estate | 2024 |
| Gilly Investments Ltd | Real estate | 2020 |
| Gimlett-Taylor Design Creative Limited | Professional & scientific | 2014 |