| Generals Corner Ltd | Arts & recreation | 2019 |
| Genesis Electrics Limited | Energy | 2018 |
| Genesis Mortgages Ltd | Financial services | 2011 |
| Genesis One Three Electrical Ltd | Construction | 2018 |
| Genius Five Innovations Limited | Manufacturing | 2021 |
| Genrev Limited | Wholesale & retail | 2009 |
| Genscorp Ltd | Professional & scientific | 2025 |
| Gentle Hands Care Service Limited | Health & social care | 2024 |
| Gents G Ltd | Other services | 2024 |
| Genuine Cleaners Limited | Administrative & support | 2008 |
| Geolapis Ltd | Information & communication | 2025 |
| Geomasters Consult Ltd. | Construction | 2011 |
| George Samuel Associates Limited | Other services | 2019 |
| George Stancu Logistics Limited | Transport & logistics | 2017 |
| George Star Builders Limited | Construction | 2015 |
| Geosec Ltd | Administrative & support | 2018 |
| Gepruk Consult Ltd | Real estate | 2021 |
| Gepruk Limited | Real estate | 2014 |
| GET Glitch Ltd | Education | 2026 |
| GET Smash'D Ltd | Hospitality | 2022 |
| GFH Waste Solutions Ltd | Water & waste | 2025 |
| GGH Construction Ltd | Construction | 2024 |
| GGH Solutions Limited | Wholesale & retail | 2025 |
| GH Nexus Limited | Wholesale & retail | 2025 |
| Ghana Foods Limited | Wholesale & retail | 2025 |
| GHD Logistics Limited | Transport & logistics | 2021 |
| Gheorghe Potoceanu Limited | Construction | 2017 |
| GHK Group Limited | Wholesale & retail | 2023 |
| Ghlc Solutions Ltd | Professional & scientific | 2025 |
| Ghost Digital and Data Limited | Information & communication | 2011 |
| GHS Electrical & Maintenance Ltd | Construction | 2020 |
| GIA Haven Housing Limited | Real estate | 2025 |
| Giags UK Ltd | Administrative & support | 2016 |
| Giani Limited | Health & social care | 2023 |
| Gianni Feraud Ltd | Wholesale & retail | 2000 |
| Gianny & ALE Ltd | Transport & logistics | 2020 |
| Gibbo's Garage Ltd | Wholesale & retail | 2015 |
| Gibbsonn Interiors Ltd | Professional & scientific | 2026 |
| Gibbsonn Ltd | Professional & scientific | 2021 |
| Gibson Close (Waterbeach) Management Company Limited | Households | 2018 |
| Gibsons and Associates Limited | Wholesale & retail | 2025 |
| GIF Car Sales Ltd | Wholesale & retail | 2025 |
| Giggear Limited | Wholesale & retail | 2003 |
| Giggle Emporium Ltd | Wholesale & retail | 2024 |
| Gigi Marketing Ltd | Information & communication | 2025 |
| Gigrigs Backline Transport Limited | Transport & logistics | 2015 |
| Gill Crabb Ltd | Other services | 2025 |
| Gillon Way (Radwinter) Management Company Limited | Households | 2016 |
| Gilmour Group Holdings Limited | Financial services | 2024 |
| Gilston Park House Freehold Limited | Households | 2010 |
| GIN Building Contractors Ltd | Construction | 2013 |
| Gina Medics Ltd | Health & social care | 2021 |
| Ginacroft Limited | Construction | 2004 |
| Gino Properties Limited | Real estate | 2024 |
| GIO Contractors Plant Ltd | Construction | 2024 |
| Gios Food Express Ltd | Wholesale & retail | 2026 |
| GIP Property Services Limited | Construction | 2025 |
| Giveawaygems Ltd | Other services | 2023 |
| GJ Commercial Consulting Limited | Professional & scientific | 2026 |
| GJA Investor Ltd | Real estate | 2017 |
| GJW Innovations Ltd | Real estate | 2023 |
| GL Cars Limited | Wholesale & retail | 2019 |
| Glad Construction Limited | Construction | 2016 |
| Gladesmere Court Watford RTM Company Limited | Households | 2017 |
| Gladgain Limited | Households | 1993 |
| Glamhealth Consultant Services Limited | Financial services | 2016 |
| Glamour Avenue Hair Salon Limited | Other services | 2024 |
| Glass River Limited | Health & social care | 2024 |
| Glass Springs Limited | Real estate | 2024 |
| Glasstech Solutions Limited | Manufacturing | 2016 |
| Gleam Team Window Cleaners Ltd | Administrative & support | 2021 |
| Glebe Road (Finchley) Management Company Limited | Households | 2005 |
| Gledge Consult Limited | Information & communication | 2022 |
| Glendean Court RTM Company Limited | Households | 2016 |
| Glennco Consulting Ltd | Other services | 2026 |
| Glenwood Healthcare Ltd. | Administrative & support | 2014 |
| Glirob Construction Ltd | Construction | 2025 |
| Glixo Ltd | Wholesale & retail | 2025 |
| Global a to Z Foods Ltd | Wholesale & retail | 2018 |
| Global Accountancy and Taxation Solutions Ltd | Professional & scientific | 2019 |
| Global Accounts Ltd | Professional & scientific | 2012 |
| Global Back Office Solutions Ltd | Administrative & support | 2019 |
| Global Car Shipping Ltd | Transport & logistics | 2022 |
| Global Emarket Consulting Ltd | Information & communication | 2015 |
| Global Exchange Academy Ltd | Professional & scientific | 2026 |
| Global Group Capital Investments Ltd | Wholesale & retail | 2017 |
| Global Group of Companies Ltd | Financial services | 2019 |
| Global Hybrid Technology Solutions Limited | Information & communication | 2021 |
| Global Link PVT Ltd | Administrative & support | 2017 |
| Global Metal Resources Ltd | Administrative & support | 2023 |
| Global Migrant Hub CIC | Health & social care | 2026 |
| Global Ordnance UK Limited | Other services | 2014 |
| Global Recruitment Hub Ltd | Professional & scientific | 2017 |
| Global Talent Leaders Ltd | Education | 2022 |
| Global Team ERP Consultants Limited | Information & communication | 2015 |
| Global Wealth Embassy Ltd | Wholesale & retail | 2024 |
| Globatrade UK Ltd | Construction | 2017 |
| Globavast Limited | Construction | 2023 |
| Gloria Cars Ltd | Wholesale & retail | 2024 |
| Gloria Pharmedical Ltd | Health & social care | 2017 |