| GTA Civils & Highways Ltd | Construction | 2025 |
| GTA London Construction Ltd | Construction | 2022 |
| Gtabuilding Ltd | Construction | 2023 |
| GTC Carpentry Limited | Construction | 1997 |
| GTG Civils Limited | Construction | 2020 |
| GTG Couriers Ltd | Transport & logistics | 2024 |
| GTG Double Glazing Ltd | Construction | 2024 |
| GTG Real Estate Ltd | Real estate | 2023 |
| GTH Limited | Administrative & support | 2021 |
| GTM Talent Finders Ltd | Administrative & support | 2024 |
| GTR Heating Limited | Construction | 2016 |
| GTS Graphics Ltd | Manufacturing | 2019 |
| GTV Smart Repairs Ltd | Wholesale & retail | 2023 |
| GTX Rail Ltd | Construction | 2019 |
| Guaranteed Services Ltd | Extraterritorial | 2024 |
| Guardian Asset Holdings Ltd | Real estate | 2019 |
| Guardian Shield Security Solution Ltd | Administrative & support | 2025 |
| Guardian Ward Security Ltd | Administrative & support | 2023 |
| Guardians FM Ltd | Administrative & support | 2018 |
| Guards 4 YOU Ltd | Administrative & support | 2024 |
| Guardsman Security Services Ltd | Administrative & support | 2023 |
| Guardsuk Limited | Administrative & support | 2023 |
| Guddy Ltd | Real estate | 2026 |
| Gudinavicius Ltd | Construction | 2026 |
| Guestspace Ltd | Hospitality | 2023 |
| Guha Limited | Real estate | 2017 |
| Guided Growth Coaching Ltd | Health & social care | 2024 |
| Guild London Limited | Education | 2023 |
| Guildford Engineering Ltd. | Professional & scientific | 2012 |
| Gujju Club Ltd | Wholesale & retail | 2025 |
| GUL House Ltd | Real estate | 2022 |
| GUL Investments Ltd | Real estate | 2010 |
| GUL Logistics Services Limited | Transport & logistics | 2025 |
| GUL Partners Limited | Real estate | 2023 |
| Gul's LDN Ltd | Wholesale & retail | 2025 |
| Gulati Capital Holdings Ltd | Financial services | 2024 |
| Gulberg Business Solutions Ltd | Wholesale & retail | 2024 |
| Gulberg Limited | Construction | 2016 |
| Gulliver Property Management Limited | Real estate | 1966 |
| Gulliver Trustees (NO2) Limited | Extraterritorial | 1966 |
| Gulliver Trustees(No 1)LIMITED | Extraterritorial | 1965 |
| Gulma Tech Ltd | Information & communication | 2018 |
| Gulz Cosmetics Ltd | Wholesale & retail | 2018 |
| Gulzar Trading Limited | Wholesale & retail | 2025 |
| Gunes Property Holding Limited | Real estate | 2021 |
| Guntur Spice Limited | Wholesale & retail | 2025 |
| GUP Shup RM5 Ltd | Hospitality | 2026 |
| GUP Trading Ltd | Wholesale & retail | 2016 |
| GUR Trading Company Limited | Wholesale & retail | 2024 |
| Guri Construction Ltd | Construction | 2024 |
| Guri Estates (UK) Ltd | Construction | 2024 |
| Guri Logistics Ltd | Manufacturing | 2016 |
| Gurii Construction Ltd | Construction | 2025 |
| Gurjinder Singh JEE Limited | Construction | 2026 |
| Gurminder Rattan Ltd | Extraterritorial | 2024 |
| Gurminder Singh Ltd | Extraterritorial | 2024 |
| Gurpreet S Construction Limited | Construction | 2020 |
| Gursevak Projects Ltd | Construction | 2025 |
| Gursukh Limited | Real estate | 2019 |
| Gursukh Property Limited | Real estate | 2024 |
| Guruhari Ltd | Real estate | 2023 |
| Guruju Property Investments Holdings Ltd | Real estate | 2021 |
| Gurunanak Transport Ltd | Transport & logistics | 2025 |
| Gurwaras One Ltd | Real estate | 2024 |
| Gurwinder Singh Construction Ltd | Construction | 2022 |
| Guts Publishing Ltd | Wholesale & retail | 2019 |
| Gutscope Limited | Health & social care | 2020 |
| GUY Phillips Limited | Real estate | 2013 |
| GV Investment Properties Ltd | Real estate | 2021 |
| GVA London Ltd | Education | 2019 |
| Gvinteriors Ltd | Construction | 2019 |
| GVK Technolgies Limited | Construction | 2026 |
| GVL Business Ltd | Professional & scientific | 2024 |
| Gvsb Trading Limited | Wholesale & retail | 2024 |
| GW Carpentry Limited | Construction | 1997 |
| Gwendoline Care Home Ltd | Health & social care | 2021 |
| Gwent Associates Limited | Hospitality | 2021 |
| GXC Logistics Ltd | Transport & logistics | 2025 |
| Gxcel Ltd | Professional & scientific | 2022 |
| GXG Trading Limited | Other services | 2025 |
| GXM Builders Ltd | Construction | 2022 |
| GXM Investments Ltd | Real estate | 2024 |
| Gycroft Limited | Real estate | 2002 |
| Gym Active Trading Ltd | Wholesale & retail | 2021 |
| Gym Therapy Coaching Limited | Other services | 2023 |
| Gytis & Varena Ltd | Construction | 2025 |
| GZ Traders UK Ltd | Wholesale & retail | 2019 |
| Gzao Ltd | Information & communication | 2021 |
| Gzonex Ltd | Wholesale & retail | 2025 |
| Gzoo Ltd | Wholesale & retail | 2024 |
| GZR Delivery Ltd | Transport & logistics | 2026 |
| Găbrică Ltd | Construction | 2020 |
| H & a Commercial Property Move Ltd | Real estate | 2023 |
| H & F Property Limited | Real estate | 2021 |
| H & H Kebab (ST Albans) Limited | Hospitality | 2013 |
| H & M Brothers Limited | Wholesale & retail | 2015 |
| H & M Hair Salon Ltd | Other services | 2016 |
| H & M Invest Limited | Real estate | 2022 |
| H & M Smart Solutions Limited | Wholesale & retail | 2025 |
| H & N (London) Ltd | Real estate | 2016 |