| Ganiboys Limited | Transport & logistics | 2026 |
| Ganidag Properties Ltd | Real estate | 2018 |
| Gaps 1 Ltd | Real estate | 2024 |
| Garage Car Parts Limited | Wholesale & retail | 2020 |
| Garage Motors Service Limited | Wholesale & retail | 2025 |
| Garden Grill 609 Ltd | Hospitality | 2026 |
| Gareth Evans and Associates Limited | Professional & scientific | 2014 |
| Garga Ltd | Other services | 2017 |
| Garip Ltd | Other services | 2025 |
| Garip Property Ltd | Real estate | 2022 |
| Garmzy Events Limited | Information & communication | 2024 |
| Garrisons Property Group Ltd | Real estate | 2026 |
| Garryarthur Limited | Professional & scientific | 2022 |
| GAS Daddy Plumbing and Heating Ltd | Construction | 2024 |
| GAS Safety and Plumbing Engineering Ltd | Construction | 2022 |
| Gasafe Heating Limited | Construction | 2011 |
| Gasmass Ltd | Manufacturing | 2015 |
| Gastroly Ltd | Hospitality | 2020 |
| Gatelands Supplies Limited | Wholesale & retail | 2002 |
| Gateway Payment Limited | Administrative & support | 2019 |
| Gator Sports Ltd | Wholesale & retail | 2011 |
| GAV Fashion Ltd | Professional & scientific | 2024 |
| GAV Ltd | Real estate | 2022 |
| Gavrilov Limited | Construction | 2004 |
| GAW Estates Limited | Real estate | 2024 |
| Gayleforce Scientific Ltd. | Professional & scientific | 2016 |
| GAZ Construction Ltd | Construction | 2012 |
| Gaziantep Patisserie Enfield Limited | Wholesale & retail | 2021 |
| GB Food Hygiene Safety Ltd | Hospitality | 2021 |
| GB Grzegorz Borecki Ltd | Construction | 2015 |
| GB Mobile Services Ltd | Wholesale & retail | 2020 |
| GB SUB 1 Limited | Real estate | 2018 |
| GB Trade Enterprises Limited | Extraterritorial | 2013 |
| Gbemi Global Limited | Health & social care | 2017 |
| Gbmauri Limited | Construction | 2025 |
| GBS 25 Ltd | Construction | 2016 |
| GC DEVELOPMENTS82 Ltd | Construction | 2018 |
| GC Mart Ltd | Wholesale & retail | 2024 |
| GCG Finance LP | | 2017 |
| GCL Property Management Ltd | Real estate | 2025 |
| Gcle Consultancy Services Limited | Professional & scientific | 2020 |
| GCT U.K Ltd | Real estate | 2025 |
| GD Groundworks & Basements Ltd | Construction | 2017 |
| GD Health Clinics Limited | Health & social care | 2013 |
| GDM Tech Services Limited | Wholesale & retail | 2009 |
| GDS Construct Services Ltd | Construction | 2014 |
| GDT Investments Ltd | Real estate | 2002 |
| Geber Communications Ltd | Professional & scientific | 2022 |
| Gece Meat Ltd | Wholesale & retail | 2021 |
| Geelas Ltd | Hospitality | 2024 |
| Geib Grafton Geib (UK) Limited | Financial services | 2006 |
| Geib Grafton Geib Limited | Other services | 2009 |
| GEL Engineering Limited | Construction | 2012 |
| GEL Property Limited | Real estate | 2019 |
| Gela Childcare Ltd | Health & social care | 2024 |
| Gelecegim Ltd | Real estate | 2021 |
| Gemlux Limited | Wholesale & retail | 2012 |
| Gemma Humes Hair Limited | Other services | 2014 |
| Gemrocks Music Publishing Ltd | Information & communication | 2020 |
| General Building and Maintenance Services Limited | Construction | 2023 |
| General Electrical & Plumbing Ltd | Other services | 2016 |
| General NCR Ltd | Wholesale & retail | 2021 |
| Generator (Eastgate Street) Ltd | Construction | 2020 |
| Generator (Holdings) Limited | Information & communication | 2008 |
| Genesis Ventures Ltd | Information & communication | 2026 |
| Gennex Elite Limited | Manufacturing | 2017 |
| Genroute Limited | Professional & scientific | 2020 |
| Gentle Hearts Care Services Ltd | Health & social care | 2026 |
| Gentle Shields Healthcare Recruitment Agency Ltd | Administrative & support | 2025 |
| Genuine Tech Limited | Wholesale & retail | 2016 |
| Genwealth Industries Ltd | Wholesale & retail | 2024 |
| Geobrow Limited | Other services | 2020 |
| Geocero Ltd | Professional & scientific | 2015 |
| George Cleaning 94 Ltd | Administrative & support | 2022 |
| George K Electrical Ltd | Construction | 2016 |
| George Milo Properties Ltd | Real estate | 2022 |
| Georgie's Packaging Supplies Ltd | | 2008 |
| Georgio's Gents Barbers Limited | Other services | 2022 |
| Georgiou Family Rentals LLP | | 2019 |
| Geothermal (UK) Limited | Construction | 2017 |
| Geotin Ltd | Manufacturing | 2025 |
| Geotrans Logistics 0405 Limited | Transport & logistics | 2025 |
| GEP Solutions Limited | Construction | 2020 |
| Gepp Industries Limited | Information & communication | 2009 |
| Gerald Charles Accountants Ltd | Professional & scientific | 2020 |
| Gerconn Ltd | Wholesale & retail | 2021 |
| Gerino Investments LP | | 2014 |
| Gesher Estates Limited | Real estate | 2024 |
| GET MTD Ready UK Limited | Professional & scientific | 2025 |
| GET OUT of Crime (Gooc) Ltd | Education | 2021 |
| Getfreshteam LP | | 2015 |
| Getting Things Done Ltd | Information & communication | 2025 |
| Gevi Services Limited | Construction | 2017 |
| GFA Transport Ltd | Transport & logistics | 2021 |
| GG-169-767 Limited | Real estate | 2023 |
| GGE Cleaning Ltd | Administrative & support | 2021 |
| GGH Electrical Services Limited | Construction | 2021 |
| Ggmt Holdings Ltd | Financial services | 2024 |
| GGS Properties London Limited | Real estate | 2019 |
| Gg’S Kitchen Ltd | Manufacturing | 2019 |