| FYM Ebill UK Limited | Information & communication | 2025 |
| G & H (Warwick) Limited | Real estate | 1959 |
| G & H Fencing Limited | Administrative & support | 2001 |
| G C Cannock Limited | Real estate | 2003 |
| G C Gainsborough Limited | Real estate | 2006 |
| G C Retford Limited | Real estate | 2005 |
| G FOX Investments Limited | Professional & scientific | 2025 |
| G Hibberd Consulting Ltd | Manufacturing | 2014 |
| G M Sandhu Transports Ltd | Transport & logistics | 2025 |
| G T Rally Limited | Administrative & support | 2015 |
| G W Wilson Transport & Storage Ltd | Administrative & support | 2022 |
| G&Co Studio Ltd | Professional & scientific | 2016 |
| G&K Hayer Ltd | Real estate | 2021 |
| G. & R. LEE Memorials Limited | Other services | 1997 |
| G.E.M. Integrated Solutions Limited | Manufacturing | 1982 |
| G.P.S.Daler Limited | Professional & scientific | 2011 |
| G1 Overseas Limited | Administrative & support | 2014 |
| G360 Prestige Ltd | Real estate | 2024 |
| G8 Architecture Ltd | Professional & scientific | 2021 |
| Gabrigail Limited | Professional & scientific | 2011 |
| GAD New Build Limited | Construction | 2018 |
| Gain Properties Limited | Professional & scientific | 2023 |
| Gall Air LLP | | 2018 |
| Gallagher Alma Limited | Professional & scientific | 2012 |
| Gallagher Bathgate Limited | Construction | 1999 |
| Gallagher Bournbrook Limited | Professional & scientific | 2012 |
| Gallagher BSH Limited | Real estate | 2018 |
| Gallagher Capital Limited | Professional & scientific | 2017 |
| Gallagher Developments Caerphilly Limited | Real estate | 2013 |
| Gallagher Developments Cardington Limited | Real estate | 2017 |
| Gallagher Developments Group Limited | Real estate | 2013 |
| Gallagher Developments Limited | Professional & scientific | 1968 |
| Gallagher Developments Warwick Limited | Real estate | 2013 |
| Gallagher Family Investments Limited | Financial services | 2011 |
| Gallagher Family Limited Partnership | | 2012 |
| Gallagher Finance Limited | Financial services | 2016 |
| Gallagher Investments Holdco Limited | Real estate | 2013 |
| Gallagher Opportunities Limited | Real estate | 2014 |
| Gallagher Property Holdings UK Limited | Real estate | 2019 |
| Gallagher Riverside Limited | Real estate | 1997 |
| Gallagher Security Europe Limited | Administrative & support | 1991 |
| Gallagher Strategic Land Limited | Real estate | 2023 |
| Gallagher UK Holdings Limited | Real estate | 2017 |
| Gallagher Ventures Limited | Professional & scientific | 1961 |
| Gallmur Limited | Real estate | 2017 |
| Gallor Ltd | Transport & logistics | 2023 |
| Gallos Solutions Limited | Professional & scientific | 2025 |
| Galvin Green (UK) Limited | Administrative & support | 2006 |
| Gamc Investments Limited | Real estate | 2020 |
| Gammadata UK Limited | Wholesale & retail | 2022 |
| Garden Keepers Limited | Administrative & support | 2009 |
| Garden Shed Cafe Wellesbourne Ltd | Hospitality | 2019 |
| Gardit Limited | Professional & scientific | 2018 |
| Garry Hickman LLP | | 2003 |
| GAS Boiler Services Limited | Construction | 2016 |
| Gast Midco Limited | Administrative & support | 2022 |
| Gast Pledgeco Limited | Administrative & support | 2022 |
| Gastech WM Ltd | Construction | 2026 |
| Gateway Summer Ltd | Real estate | 2023 |
| Gateway Winter Ltd | Households | 2024 |
| Gator Gear Ltd | Wholesale & retail | 2014 |
| GB Fire Compliance Ltd | Professional & scientific | 2025 |
| GC Bescot Limited | Real estate | 2007 |
| GC Covcan Limited | Real estate | 2007 |
| GC Housing Solutions Limited | Real estate | 2025 |
| GC Oldbury Limited | Real estate | 2005 |
| GCG Development Partnerships Ltd. | Construction | 2003 |
| GD Draughting Services Ltd | Other services | 2025 |
| GD Holdings Limited | Financial services | 2021 |
| Gds-Net Group Limited | Financial services | 2020 |
| Geberit Sales Limited | Wholesale & retail | 2007 |
| Gegan Environmental Management Ltd | Professional & scientific | 2022 |
| Gehan Pathiraja Ltd | Real estate | 2024 |
| Gejb London Ltd | Administrative & support | 2018 |
| Gemini Collective Ltd | Manufacturing | 2026 |
| Gen-Hr Solutions Ltd | Professional & scientific | 2011 |
| Genan Limited | Water & waste | 2008 |
| Genepower Limited | Manufacturing | 2025 |
| Genesis Living Ltd | Public administration | 2019 |
| Genexis Broadband UK Ltd | Information & communication | 2021 |
| Geodesign Barriers Ltd | Wholesale & retail | 2003 |
| George Charles Finance Limited | Wholesale & retail | 2019 |
| George Cristian Transport Ltd | Transport & logistics | 2025 |
| Georgina Mccarthy Counselling Ltd | Health & social care | 2020 |
| Gerant Limited | Information & communication | 2025 |
| Gerell Ltd | Professional & scientific | 2026 |
| Gerry Mcgovern Design Limited | Professional & scientific | 2020 |
| Getx Team UK Limited | Professional & scientific | 2022 |
| Getzner UK Limited | Manufacturing | 2021 |
| GF Business Park Ltd | Administrative & support | 2024 |
| GFA Elektromaten UK Ltd | Manufacturing | 1980 |
| GFA UK Real Estate Ltd | Real estate | 2019 |
| Gfct Limited | Other services | 2004 |
| Gfct Treatment Support Ltd. | Wholesale & retail | 2024 |
| GG Nail Products Limited | Wholesale & retail | 2019 |
| GG-938-130 Limited | Real estate | 2021 |
| GH Tech Innovations Ltd | Professional & scientific | 2024 |
| Ghastly Media Ltd | Information & communication | 2025 |
| Ghost Operations UK Ltd | Information & communication | 2021 |
| Ghrc Ltd | Administrative & support | 2021 |