| Gais Management Consulting Limited | Professional & scientific | 2025 |
| Galating Lettings Ltd | Real estate | 2024 |
| Galaxio Ltd | Professional & scientific | 2025 |
| Galaxy Shopfitter Ltd | Construction | 2015 |
| Galowy Consulting Limited | Professional & scientific | 2025 |
| Galowy Holdings Limited | Financial services | 2025 |
| GAM Payment Solutions Ltd | Wholesale & retail | 2021 |
| Gamatty Limited | Professional & scientific | 2026 |
| Gandhi Investments Limited | Real estate | 2004 |
| Gandhi Wine Suppliers Limited | Manufacturing | 1984 |
| Ganef Pharma Limited | Professional & scientific | 2019 |
| Gapclamp Limited | Manufacturing | 2009 |
| Gaplo Limited | Construction | 2017 |
| Gardenia-It Limited | Information & communication | 2008 |
| Gardex Limited | Transport & logistics | 2018 |
| Gargh Ltd | Administrative & support | 2025 |
| Gary Jacobs & Co Limited | Professional & scientific | 2007 |
| GAS Solutions(Lon) Ltd | Construction | 2020 |
| GAS Vortex Ltd | Construction | 2021 |
| Gasaba Catering Ltd | Hospitality | 2017 |
| Gasbusterz Limited | Construction | 2011 |
| Gateway Global Services Ltd | Transport & logistics | 2020 |
| Gateway Law Chambers Ltd | Professional & scientific | 2026 |
| Gateway Retail Ltd | Wholesale & retail | 2013 |
| Gateway Traders Ltd | Wholesale & retail | 2020 |
| GAV Installations Ltd | Construction | 2023 |
| Gavir Ltd | Manufacturing | 2025 |
| Gazemaze Limited | Wholesale & retail | 2007 |
| GB Best Limited | Wholesale & retail | 2024 |
| GB Clearances Ltd | Administrative & support | 2018 |
| GB Fleet Ltd | Transport & logistics | 2026 |
| GB Wealth Limited | Real estate | 2017 |
| Gbph Services Ltd | Construction | 2019 |
| GCK Foods Limited | Wholesale & retail | 2025 |
| Gechkata Ltd | Administrative & support | 2015 |
| GEE Eight Engineering and Construction Limited | Construction | 2021 |
| Geeky Suspects Limited | Hospitality | 2020 |
| Geet Homes Ltd | Real estate | 2022 |
| Gefest Construction Group Ltd | Construction | 2025 |
| Gemini Real Estate Investment Ltd | Real estate | 2022 |
| Gemma Sunshine Ltd | Wholesale & retail | 2025 |
| Gemtech Investment and Technical Limited UK Ltd | Construction | 2026 |
| GEN & Co Limited | Construction | 2014 |
| GEN AI Technologies Limited | Information & communication | 2025 |
| Genar Limited | Construction | 2026 |
| Gench Limited | Professional & scientific | 2002 |
| General Work Services Limited | Construction | 2022 |
| Genexo AI Ltd | Information & communication | 2025 |
| Genius Mindas Ltd | Hospitality | 2025 |
| Genius Realm Limited | Administrative & support | 2021 |
| Gentle Seas Ltd | Wholesale & retail | 2020 |
| Geofireprotec Ltd | Construction | 2021 |
| Geomar Trans Ltd | Transport & logistics | 2018 |
| George Fixing Ltd | Construction | 2019 |
| George Michael Enterprises Ltd | Hospitality | 2021 |
| Georges Compassion Limited | Health & social care | 2025 |
| Georgie Bungle Ltd | Real estate | 2010 |
| Gerc Services Ltd | Administrative & support | 2026 |
| Geva Transport Ltd | Transport & logistics | 2018 |
| GEW Services Limited | Construction | 2016 |
| GGG Holdings Limited | Financial services | 2026 |
| GGT Limited | Other services | 2025 |
| Ghorowa Shaad Ltd | Hospitality | 2025 |
| GIA Interiors Ltd | Construction | 2021 |
| Giani Trans Ltd | Administrative & support | 2017 |
| Giant Properties Ltd | Real estate | 2020 |
| Giants TV Ltd | Professional & scientific | 2019 |
| Gibberish Film Company Limited | Information & communication | 2003 |
| Giddeon's Ltd | Construction | 2025 |
| Giediminas Ltd | Construction | 2016 |
| Gift&Go - Personalised Gifts and Present Ideas Ltd | Wholesale & retail | 2019 |
| Gikus Construction Ltd | Construction | 2018 |
| Gilead Complete Care Group Limited | Health & social care | 2020 |
| Gill Shopfronts Limited | Construction | 2011 |
| Gillgate Limited | Wholesale & retail | 2025 |
| Giltsave Property Management Company Limited | Households | 1990 |
| Gima (UK) Limited | Wholesale & retail | 1998 |
| Gimanima Ltd | Real estate | 2026 |
| GIO Xpress Cleaning Ltd | Administrative & support | 2026 |
| Gioly Logistics Ltd | Construction | 2019 |
| Giorgi Gold Hand Ltd | Construction | 2025 |
| Gjana Barbers Ltd | Other services | 2021 |
| GK Shopfronts Limited | Manufacturing | 2022 |
| GK Softech Ltd | Other services | 2025 |
| GKJ Associates Limited | Financial services | 2009 |
| GKJ Umbrella Payroll Services Ltd | Professional & scientific | 2021 |
| Glad Tidings 13 Limited | Health & social care | 2014 |
| Glam Inn Limited | Other services | 2025 |
| Glamorous Nails & Beauty Limited | Other services | 2013 |
| Glamour Touch Cosmetics Limited | Wholesale & retail | 2015 |
| Glass & General Ltd | Wholesale & retail | 2008 |
| Glaze Shopfronts Ltd | Manufacturing | 2023 |
| Glidec Ltd | Wholesale & retail | 2024 |
| Glist Limited | Arts & recreation | 2024 |
| Glob Ltd | Wholesale & retail | 2026 |
| Global AID Ltd | Health & social care | 2016 |
| Global Bengali Hindu Platform | Professional & scientific | 2025 |
| Global Career Services Limited | Education | 2008 |
| Global Commodity Bulletin Limited | Professional & scientific | 2025 |
| Global Communication Academy | Education | 2024 |