| Gillian Levett Limited | Health & social care | 2011 |
| Gills Hill Radlett Management Limited | Households | 1999 |
| Gillz Construction Limited | Construction | 2025 |
| Ging Investments Limited | Financial services | 2026 |
| Ginger Genes Ltd | Professional & scientific | 2019 |
| Ginger TOM Consulting Limited | Professional & scientific | 2017 |
| Ginkgo Studio Limited | Professional & scientific | 2024 |
| Gintell Ltd | Transport & logistics | 2025 |
| Giokay Homes Limited | Real estate | 2022 |
| Giokay Properties Ltd | Real estate | 2022 |
| Giopas Ltd | Professional & scientific | 2019 |
| Gios Innovation Limited | Information & communication | 2020 |
| Gios Technology Limited | Information & communication | 2007 |
| Gippeswyck Limited | Real estate | 2024 |
| GIR Builders Limited | Construction | 2025 |
| Gira Installations Limited | Construction | 2022 |
| Girafingo Ltd | Information & communication | 2017 |
| Girigiri Ltd | Wholesale & retail | 2021 |
| Girls Cant DJ Limited | Arts & recreation | 2021 |
| Girnar Cafe Ltd | Hospitality | 2024 |
| GIS Properties Limited | Real estate | 2024 |
| Giso Luxury Inc Ltd | Wholesale & retail | 2021 |
| GIT Infosys Ltd | Wholesale & retail | 2023 |
| Gitbit Limited | Real estate | 2018 |
| Give Travel Ltd | Transport & logistics | 2026 |
| Givo Ncho Ltd | Wholesale & retail | 2026 |
| Giza Construction Ltd | Construction | 2018 |
| Giza Elegance Ltd | Wholesale & retail | 2025 |
| Gizmatix Limited | Information & communication | 2013 |
| Gizmo-Guru Limited | Wholesale & retail | 2003 |
| GJ & MJ Developments Ltd | Real estate | 2026 |
| GJ & MJ Ltd | Real estate | 2019 |
| GJ Boys Event and Management Ltd | Hospitality | 2025 |
| GJ Investment Group Limited | Real estate | 2026 |
| GJ IT Services Ltd | Information & communication | 2025 |
| GJ05 Trading Ltd | Wholesale & retail | 2024 |
| GJ23 Chatpata Ltd | Hospitality | 2025 |
| GJA Consulting Limited | Professional & scientific | 2022 |
| GJA Estates Limited | Real estate | 2020 |
| GK Advisory Group Ltd | Professional & scientific | 2026 |
| GK Heating and Plumbing Limited | Construction | 2016 |
| GK Hris Consultancy Limited | Professional & scientific | 2018 |
| GK Packaging Ltd | Wholesale & retail | 2026 |
| GK Travel Limited | Transport & logistics | 2022 |
| GKA Global Solutions Ltd | Professional & scientific | 2020 |
| GKA Project Limited | Construction | 2025 |
| Gkas Properties Limited | Real estate | 2023 |
| GKD 18ND Ltd | Real estate | 2024 |
| GKD 33HDR Ltd | Construction | 2024 |
| GKD 74HS Ltd | Construction | 2024 |
| Gkjj Limited | Administrative & support | 2024 |
| GKP Enterprise Ltd | Wholesale & retail | 2025 |
| GKP Pharma Ltd | Wholesale & retail | 2025 |
| GKR Properties Limited | Real estate | 2000 |
| GKR Refurbishment Ltd | Construction | 2025 |
| GKS Consulting Ltd | Information & communication | 2012 |
| Gladcon Developments Ltd | Households | 2024 |
| Gladcon Properties Ltd | Real estate | 2024 |
| Gladecrown Associates Limited | Construction | 1999 |
| Gladstone Medical Centre Ltd | Health & social care | 2025 |
| Gladstone Park Holdings Ltd | Financial services | 2021 |
| Glam & Bargain Ltd | Wholesale & retail | 2025 |
| Glam & Glow Ltd | Other services | 2025 |
| Glamine Jewellery Limited | Wholesale & retail | 2023 |
| Glamorosa Ltd | Health & social care | 2022 |
| Glass Garden Aquatics Ltd | Wholesale & retail | 2024 |
| Glass House J & B Ltd | Manufacturing | 2019 |
| Glass World (Europe) Ltd | Manufacturing | 2008 |
| Glassdan Global Ventures & Co Ltd | Administrative & support | 2026 |
| Glassfish Ltd | Hospitality | 2005 |
| Glatt House Company Ltd | Households | 2025 |
| Glavin's Electrical Services Ltd | Construction | 2019 |
| Glaze Grill & Lounge Ltd | Hospitality | 2025 |
| GLB Logistic Solutions Limited | Transport & logistics | 2020 |
| GLC 1 Limited | Other services | 2020 |
| GLC Alloys Limited | Manufacturing | 2002 |
| GLC Construction 1 Limited | Construction | 2020 |
| GLC Construction Limited | Construction | 2015 |
| GLC Globe PVT Ltd | Professional & scientific | 2022 |
| GLC Holdings Limited | Administrative & support | 2016 |
| GLD UP Limited | Information & communication | 2022 |
| Glebe Crescent Ltd | Real estate | 2025 |
| Glebe Knoll Limited | Households | 2008 |
| Glebefield Services Limited | Wholesale & retail | 1998 |
| Glenaway Limited | Public administration | 2020 |
| Glenfield Court Limited | Construction | 2021 |
| Glenisland Management Services Ltd | Professional & scientific | 2011 |
| Glenmore Consulting Limited | Professional & scientific | 2022 |
| Glenrosa Homes (Freehold) Limited | Real estate | 2021 |
| Glenrosa Homes Ltd | Real estate | 2021 |
| Glenskills Ltd | Construction | 2022 |
| Glentons Limited | Wholesale & retail | 2007 |
| Glentv Ltd | Information & communication | 2000 |
| Glenwood Contractors Ltd | Administrative & support | 2017 |
| GLENWOOD2026 Ltd | Professional & scientific | 2026 |
| Glim N Gloss Ltd | Other services | 2025 |
| Glimm Construction Ltd | Construction | 2024 |
| Glinda Ltd | Other services | 2023 |
| GLO Estates Limited | Real estate | 2012 |
| GLO Properties & Services Ltd. | Real estate | 2022 |