| Good Times Roll (Ice Cream) Limited | Wholesale & retail | 2019 |
| Good Week Ltd | Wholesale & retail | 2025 |
| Good Yield Hunting Limited | Real estate | 2019 |
| Goodies Properties Limited | Real estate | 2001 |
| Goodjobrigging Limited | Construction | 2024 |
| Goodman Canary Wharf Limited | Hospitality | 2011 |
| Goodman Scenic Construction Ltd | Construction | 2018 |
| Goodman Scenic Services Ltd | Information & communication | 2013 |
| Goodman's Bridge Club Ltd | Arts & recreation | 2025 |
| Goodmans Autos Limited | Wholesale & retail | 1962 |
| Goodmayes Pharmacy Limited | Wholesale & retail | 2023 |
| Goodwealth Ltd | Professional & scientific | 2023 |
| Goodwyn Charles Ltd | Real estate | 2020 |
| Goor Nisht Arts & Entertainment Productions Limited | Wholesale & retail | 2022 |
| Gophr Limited | Information & communication | 2014 |
| Gorgias London UK Ltd | Administrative & support | 2017 |
| Gosocl Limited | Information & communication | 2012 |
| Gospel Heritage C.I.C. | Information & communication | 2024 |
| Gosport Smile Centre Ltd | Health & social care | 2007 |
| GOT Capital (EU) Ltd | Financial services | 2024 |
| GOT Capital Ltd | Financial services | 2014 |
| GP Developers Ltd | Construction | 2015 |
| Gpcd Ltd | Professional & scientific | 2022 |
| GPN84 Ltd | Financial services | 2018 |
| GPS Waterproofing Ltd | Construction | 2016 |
| GPX Holdings Limited | Construction | 1942 |
| Grace Apartments Limited | Real estate | 2020 |
| Grace Manor Care Limited | Health & social care | 1998 |
| Graceliving Healthcare Ltd | Health & social care | 2023 |
| Gracon Limited | Professional & scientific | 2009 |
| Gracon Property Limited | Real estate | 2021 |
| Grade One TV Crews Limited | Administrative & support | 2015 |
| Grafton House Management Company (RTM) Limited | Professional & scientific | 2004 |
| Granalytics Ltd | Information & communication | 2023 |
| Grand Associates Limited | Hospitality | 2002 |
| Grandera Renovations Ltd | Construction | 2025 |
| Grandeur Abode Ltd | Real estate | 2018 |
| Grange Court (Pinner) Ltd | Extraterritorial | 2012 |
| Grange Court Maintenance (Pinner) Limited | Households | 1977 |
| Granger Enterprises Limited | Administrative & support | 2014 |
| Grant Associates Limited | Real estate | 2008 |
| Grant Tapley Limited | Information & communication | 2013 |
| Graphiqrocket Ltd | Professional & scientific | 2020 |
| Graphite Square Commercial Ltd | Real estate | 2025 |
| Graphite Square Holdings Limited | Construction | 2021 |
| Graphite Square LLP | | 2021 |
| Graphite Square Property Co Ltd | Construction | 2021 |
| Gravitas Commercial Services Limited | Professional & scientific | 2022 |
| Greanco Limited | Financial services | 2024 |
| Great Jubilee Wharf Management Limited | Households | 1998 |
| Greek Unique Limited | Hospitality | 2021 |
| Green & Gold Ltd | Manufacturing | 2014 |
| Green Acres Consultancy Limited | Administrative & support | 2014 |
| Green Chillies Restaurant Ltd | Hospitality | 2020 |
| Green Dawn Media Limited | Arts & recreation | 2019 |
| Green House & Roof Ltd | Real estate | 2020 |
| Green Lanes Logistics Ltd | Wholesale & retail | 2019 |
| Green Medical Consultants Ltd | Health & social care | 2020 |
| Green Mountain Estates Ltd | Real estate | 2014 |
| Green Property Engineering Ltd | Construction | 2022 |
| Green Turtle Energy Ltd | Professional & scientific | 2024 |
| Greenfield Exim Consulting Limited | Professional & scientific | 2021 |
| Greenfield Fresh Smiles Ltd | Health & social care | 2018 |
| Greenhold Properties Ltd | Real estate | 2003 |
| Greens Scene Limited | Administrative & support | 2023 |
| Greens Team Ltd | Administrative & support | 2007 |
| Greens Team Nursery Limited | Administrative & support | 2023 |
| Greenstone Consult Ltd | Professional & scientific | 2025 |
| Greenwich Homes Limited | Real estate | 2017 |
| Greg Building & Maintenance Ltd | Construction | 2026 |
| Greg White Photography Limited | Professional & scientific | 2011 |
| Gregory Mackenzie & Co. Limited | Professional & scientific | 1979 |
| Gregson Stage Services Ltd | Construction | 2024 |
| Gren Group Ltd | Professional & scientific | 2025 |
| Grice's Wharf Limited | Extraterritorial | 2016 |
| Grices Freehold Ltd | Real estate | 2021 |
| Grices Wharf Penthouse Ltd | Real estate | 2022 |
| Grid Line Power Networks Ltd | Energy | 2025 |
| Grief Doctor Ltd | Extraterritorial | 2024 |
| Griggs (Acorns) Limited | Construction | 2024 |
| Griggs (Bentley Heath) Limited | Construction | 2022 |
| Griggs (Borehamwood) Limited | Construction | 2021 |
| Griggs (Bushey 2) Limited | Construction | 2025 |
| Griggs (Bushey) Limited | Construction | 2024 |
| Griggs (Commercial) Limited | Construction | 2020 |
| Griggs (Felden) Limited | Construction | 2022 |
| Griggs (Freeholds) Limited | Construction | 2019 |
| Griggs (Oaklands) Limited | Construction | 2024 |
| Griggs (Office) Limited | Construction | 2019 |
| Griggs (Options 2) Limited | Administrative & support | 2026 |
| Griggs (Options) Limited | Construction | 2019 |
| Griggs (Radlett 2) Limited | Construction | 2026 |
| Griggs (South Mimms) Limited | Construction | 2019 |
| Griggs (W) Limited | Construction | 2023 |
| Griggs Construct Limited | Construction | 2026 |
| Griggs Holdings Limited | Construction | 2019 |
| Griggs Homes Limited | Construction | 2026 |
| Griggs JDR (Stanmore) Limited | Administrative & support | 2018 |
| Griggs Property Care Limited | Real estate | 2024 |
| Groico Ltd | Professional & scientific | 2013 |