| Gaea Wireless Limited | Information & communication | 2019 |
| Gamdely Construction Ltd | Manufacturing | 2024 |
| Gamp and TAD Limited | Health & social care | 2025 |
| Ganesha Food Ltd | Hospitality | 2025 |
| Garden Kebab Van Ltd | Hospitality | 2024 |
| Garden Village Vets Limited | Professional & scientific | 2011 |
| Garfree Limited | Households | 1988 |
| Garjon Projects Limited | Professional & scientific | 2014 |
| Gary Shore Film Ltd | Information & communication | 2015 |
| Gastromedica Ltd | Health & social care | 2021 |
| Gatc Search Limited | Administrative & support | 2013 |
| Gatehouse Nursery Holdings Limited | Professional & scientific | 1998 |
| Gateside Homes CIC | Hospitality | 2024 |
| Gateside Housing CIC | Hospitality | 2024 |
| Gateways Healthcare Ltd | Health & social care | 2025 |
| GB Vehicle Sales Ltd | Wholesale & retail | 2021 |
| GBC Psychotherapy Practice Ltd | Other services | 2017 |
| GBF Couriers Logistics Ltd | Transport & logistics | 2024 |
| GBM Properties Limited | Extraterritorial | 2013 |
| GBR Forestry Ltd | Agriculture & fishing | 2023 |
| GC Financial Services Limited | Financial services | 1996 |
| GC Strategy Dimensions Ltd | Professional & scientific | 2019 |
| Gcadd Limited | Transport & logistics | 2017 |
| Gccuk Ltd | Administrative & support | 2026 |
| GCG Ventures Ltd | Professional & scientific | 2014 |
| Gclouds IT Consultancy Ltd | Information & communication | 2019 |
| GDB Healthcare Services Company Limited | Administrative & support | 2024 |
| GDC Developments Limited | Construction | 2025 |
| GDH Properties Ltd | Real estate | 2025 |
| GDV Taxi Limited | Transport & logistics | 2024 |
| Gear Change Group Limited | Manufacturing | 2017 |
| Geebee Consult Limited | Information & communication | 2015 |
| Geebee Property Limited | Real estate | 2020 |
| Geekybugs Limited | Information & communication | 2025 |
| Gekorm Ltd | Information & communication | 2025 |
| GEL Krupa Limited | Wholesale & retail | 2025 |
| Gelyn Limited | Health & social care | 2022 |
| GEN IA Solutions Group Limited | Professional & scientific | 2025 |
| Genaral Maintenance Infrastructure Ltd | Construction | 2025 |
| Gentian Events Limited | Administrative & support | 2012 |
| Gentleoakcare Limited | Health & social care | 2025 |
| Gents Barber Hatfield Limited | Other services | 2025 |
| George Marius Sava Ltd | Transport & logistics | 2023 |
| George's Industrial Services Limited | Administrative & support | 1971 |
| Gerent Technologies Limited | Information & communication | 2022 |
| Getyourbellyout Community Interest Company | Health & social care | 2018 |
| Gewls Ltd | Manufacturing | 2025 |
| Ghazala RAD Limited | Health & social care | 2023 |
| Ghostfish Ltd | Professional & scientific | 2024 |
| Gillian Rodgers Limited | Information & communication | 2011 |
| Gilt Import and Export Ltd | Transport & logistics | 2020 |
| GINGE76 Limited | Health & social care | 2022 |
| Ginger&Glo Ltd | Manufacturing | 2026 |
| Gioco Limited | Manufacturing | 2005 |
| Girl Power Energy Limited | Energy | 2024 |
| Givemore UK Ltd | Wholesale & retail | 2018 |
| Giver Infotech Ltd | Information & communication | 2023 |
| GK Installations Ltd | Construction | 2023 |
| GLA Investments Ltd | Real estate | 2023 |
| Gladhosts Limited | | 1974 |
| Glamour Hatfield Limited | Other services | 2019 |
| Glass Cage Ltd | Real estate | 2021 |
| Glendee Rescue Ltd | Administrative & support | 2015 |
| Glide Cars Limited | Administrative & support | 2025 |
| GLK Investments Limited | Financial services | 2022 |
| Global Duet Ltd | Administrative & support | 2024 |
| Global Pharm Associate Limited | Health & social care | 2017 |
| Global Students Lettings Ltd | Construction | 2019 |
| Glow Caregivers Ltd | Health & social care | 2023 |
| GM Tours Limited | Administrative & support | 1994 |
| GMH Business Coaching Limited | Professional & scientific | 2007 |
| Gmol (UK) Limited | Hospitality | 2023 |
| GNB Aviation Limited | Transport & logistics | 2025 |
| Go Global Consulting Services Ltd | Professional & scientific | 2026 |
| Go Repair Specialist Ltd | Construction | 2019 |
| Go Residents Association Limited | Households | 2006 |
| Gobble UP Catering Limited | Hospitality | 2020 |
| Godwin Healthcare Solutions Limited | Health & social care | 2016 |
| Goheadway Ltd | Education | 2023 |
| Gohil Medical Services Ltd | Health & social care | 2015 |
| Gold Car Valeting Ltd | Administrative & support | 2025 |
| Goldcoast Services Limited | Transport & logistics | 2021 |
| Golden Craft Supplies Limited | Administrative & support | 2025 |
| Golden Food Triangle Ltd | Hospitality | 2025 |
| Golden Sunshine Property Investment Ltd | Real estate | 2021 |
| Goldidea LEE Ltd | Information & communication | 2025 |
| Goldlips Ltd | Information & communication | 2016 |
| Goldser Limited | Health & social care | 2023 |
| Golf Marketing Services Employee Ownership Trustees Limited | Professional & scientific | 2025 |
| Golf Marketing Services Holdings Limited | Professional & scientific | 2001 |
| Golf Marketing Services Limited | Professional & scientific | 1998 |
| Goliath Payment Systems Ltd | Information & communication | 2022 |
| Gonitz Ltd | Health & social care | 2022 |
| Goodman House (Freehold) Limited | Households | 2024 |
| Goodwood Fencing Limited | Administrative & support | 2012 |
| Goonatic Ltd | Administrative & support | 2025 |
| Goonies Never SAY DIE Limited | Construction | 2024 |
| Gopher I.T. Support Limited | Information & communication | 2016 |
| Gopinathji Ltd | Real estate | 2026 |
| Gorison Limited | Hospitality | 2019 |