| GAL Project Ltd | Professional & scientific | 2019 |
| GAL. COM Ltd | Professional & scientific | 1999 |
| Galamaga's Team Ltd | Wholesale & retail | 2019 |
| Galaxy Garments Limited | Wholesale & retail | 2024 |
| Galdar Ltd | Other services | 2016 |
| Galeich Construction Limited | Construction | 2025 |
| Galgo (U.K.) Limited | Professional & scientific | 1977 |
| Galla Civils Ltd | Professional & scientific | 2019 |
| Gama Construction Solution Ltd | Construction | 2023 |
| Gambit Digital Solutions Limited | Information & communication | 2013 |
| Gambling License Advice Limited | Information & communication | 2017 |
| Game Space ADS Ltd | Arts & recreation | 2018 |
| Gamlingay Estate Management Limited | Real estate | 2026 |
| Gamma K Ltd | Transport & logistics | 2025 |
| GAN GAN Ltd | Education | 2022 |
| Ganga IT Solution Ltd | Information & communication | 2024 |
| Gangidi Limited | Information & communication | 2025 |
| Gani Express Limited | Transport & logistics | 2021 |
| GAO Express Limited | Hospitality | 2023 |
| GAP Recruitment Consultants Ltd | Transport & logistics | 2019 |
| GAP Way Ltd | Administrative & support | 2020 |
| Garage Services 4 U Limited | Wholesale & retail | 2017 |
| Garage Studio Ltd | Wholesale & retail | 2024 |
| Garbo Holdings Limited | Real estate | 2017 |
| Garden Gate Limited | Information & communication | 2015 |
| Gardenia Landscaping Ltd | Administrative & support | 2025 |
| Gardiner Logistics Limited | Transport & logistics | 2017 |
| Garnet UK Properties Ltd | Real estate | 2025 |
| Garrard Windows Holdings Limited | Financial services | 2020 |
| Garrard Windows Limited | Manufacturing | 1997 |
| Garthur Limited | Professional & scientific | 2025 |
| Gary Blessing Consulting Services Limited | Professional & scientific | 2025 |
| GAS FIX Luton Ltd | Construction | 2018 |
| GAS Guard Plumbing and Heating Ltd | Construction | 2024 |
| GAS Saife Limited | Construction | 2023 |
| GAS Suppliers Ltd | Information & communication | 2025 |
| Gas'N'Elec Ltd | Construction | 2017 |
| Gasfix Pro Ltd | Construction | 2019 |
| Gaslink-Co Limited | Construction | 2007 |
| Gasslingen Limited | Real estate | 2021 |
| Gata Bagajul Travel Ltd | Wholesale & retail | 2025 |
| Gatd Ltd | Administrative & support | 2021 |
| Gate Machinery International Limited | Manufacturing | 1993 |
| Gatekeepers Care Solutions Ltd | Administrative & support | 2020 |
| Gates General Services Ltd | Administrative & support | 2024 |
| Gates Security Services Ltd | Administrative & support | 2020 |
| Gateway Environmental Services Ltd | Administrative & support | 2009 |
| Gaura International Limited | Other services | 2020 |
| Gauranga Capital Limited | Professional & scientific | 2020 |
| Gauranga LAB Limited | Information & communication | 2021 |
| Gauranga Resources Limited | Wholesale & retail | 2020 |
| Gausse Limited | Other services | 2011 |
| Gavin Fleet Care Limited | Wholesale & retail | 1996 |
| Gavin Grace Ltd | Construction | 2019 |
| Gawaja Enterprises Ltd | Transport & logistics | 2019 |
| Gaya Traders Ltd | Wholesale & retail | 2026 |
| Gazal Kitchen Ltd | Hospitality | 2025 |
| Gazeley Utilities Limited | Construction | 2021 |
| Gazi Creatives Ltd | Professional & scientific | 2021 |
| GB Expert Limited | Real estate | 2025 |
| GB Online Store Ltd | Wholesale & retail | 2021 |
| GB Roofing and Property Maintenance Ltd | Construction | 2025 |
| GBA Solutions Limited | Information & communication | 2011 |
| GBC 1 Ltd | Construction | 2021 |
| GBL Trading Ltd | Wholesale & retail | 2024 |
| Gble Enterprise Ltd | Construction | 2022 |
| GBS Advisors Limited | Professional & scientific | 2026 |
| GBT Trans Limited | Transport & logistics | 2016 |
| GBT Urban Projects Ltd | Construction | 2025 |
| GC Builders Ltd | Construction | 2024 |
| GC Company Luton Limited | Hospitality | 2016 |
| GC Consultance Limited | Professional & scientific | 2021 |
| GC Luton Cafe Limited | Hospitality | 2025 |
| Gcar Trading Ltd | Administrative & support | 2025 |
| GCC World Limited | Professional & scientific | 2025 |
| Gcinfinity Ltd | Wholesale & retail | 2025 |
| Gcs-Gateway Consultancy Services Ltd | Health & social care | 2018 |
| GCT Traders Ltd | Wholesale & retail | 2025 |
| GD and Sons Services Ltd | Construction | 2026 |
| GD9 Studios Ltd | Professional & scientific | 2014 |
| GDC Cleaning Ltd | Administrative & support | 2025 |
| GDC Cleaning Services Ltd | Administrative & support | 2025 |
| GDC Cleaning Solutions Ltd | Administrative & support | 2025 |
| GDL Driving Ltd | Extraterritorial | 2019 |
| GDL Rental Ltd | Administrative & support | 2025 |
| GDM Building Ltd | Construction | 2026 |
| Gdnl Construction Ltd | Construction | 2025 |
| Gdnl Ltd | Real estate | 2021 |
| Gear 5TH Limited | Professional & scientific | 2025 |
| Gearup Emporium Ltd | Wholesale & retail | 2024 |
| Gearup Wheels Limited | Wholesale & retail | 2024 |
| Gebergs Healthcare Ltd | Other services | 2018 |
| GEBUSK2 Security Limited | Administrative & support | 2022 |
| Gedeon Property & Plastering Ltd | Construction | 2015 |
| GEE PEE Caters PVT Ltd | Hospitality | 2024 |
| Geek to Great Ltd | Arts & recreation | 2024 |
| Geemack Ltd | Wholesale & retail | 2025 |
| Geesons Ltd | Households | 2025 |
| GEG Care Limited | Health & social care | 2022 |
| GEG Properties Limited | Real estate | 2022 |