| Global 24/7 Healthcare Limited | Health & social care | 2014 |
| Global Culture Brands Ltd | Wholesale & retail | 2023 |
| Global Finance and Compliance Hub (UK) Limited | Professional & scientific | 2020 |
| Global House Facilities (UK) Ltd | Administrative & support | 2010 |
| Globentix Limited | Administrative & support | 2025 |
| Glow and Shine Tanning Ltd | Other services | 2023 |
| GLP Property Investments Limited | Construction | 2023 |
| GLR Electrical Ltd | Construction | 2013 |
| GM Grocers Ltd | Wholesale & retail | 2013 |
| Gnosis Two Limited | Information & communication | 2013 |
| Go FAN FAN Ltd | Hospitality | 2025 |
| Go Sportswear Ltd | Wholesale & retail | 2019 |
| Gocloud Technologies Ltd | Information & communication | 2016 |
| Godas Garage Ltd | Wholesale & retail | 2024 |
| Gold Rock Capital Ltd | Real estate | 2024 |
| Golden Blade Eltham Ltd | Other services | 2023 |
| Golden J Service Ltd | Hospitality | 2025 |
| Goldenalley Ltd | Wholesale & retail | 2024 |
| Goldify Touch Ltd | Construction | 2026 |
| Goldstar Coaches of Gravesend Limited | Transport & logistics | 2015 |
| Goldy Dryliner Ltd | Construction | 2021 |
| Goode Plumbing & Heating Services Ltd | Construction | 2020 |
| Grace Imperial Services Limited | Health & social care | 2023 |
| Grace Workforce Limited | Administrative & support | 2024 |
| Grand Scaffolding Limited | Administrative & support | 2017 |
| Grandpa Tools Ltd | Wholesale & retail | 2025 |
| Gratwick Holdings Ltd | Financial services | 2021 |
| Gravitas Advisory Limited | Professional & scientific | 2025 |
| Great Scott Plumbing Heating Ltd | Construction | 2025 |
| Greek Gillingham Ltd | Hospitality | 2023 |
| Greek Patisserie Ltd | Wholesale & retail | 2026 |
| Green Ebiz Solutions Limited | Information & communication | 2008 |
| Green Orchard Estates Limited | Real estate | 2024 |
| Green Resilience Facility Ltd | Professional & scientific | 2023 |
| Green Shores Nominee Limited | Information & communication | 2018 |
| Green Star UK Services Ltd | Water & waste | 2021 |
| GREEN4D Limited | Manufacturing | 2019 |
| Greenage Services Limited | Professional & scientific | 2005 |
| Greenstep Projects Ltd | Professional & scientific | 2025 |
| Greenwich Plumbing Ltd | Construction | 2008 |
| Greenwich Village Gallery Limited | Extraterritorial | 2018 |
| Gregan Property Management Ltd | Real estate | 2017 |
| Greongraf Ltd | Professional & scientific | 2024 |
| Greyfox Residential Ltd | Real estate | 2025 |
| Griffin GEO Ltd | Professional & scientific | 2016 |
| Grillos Periperi Croydon Limited | Hospitality | 2022 |
| Grove Road Block a Management Company Limited | Professional & scientific | 2012 |
| Grove Road Block C Management Company Limited | Professional & scientific | 2012 |
| Grovebury Court Limited | Real estate | 2007 |
| Growth Bridge Ltd | Agriculture & fishing | 2024 |
| Growth IT Solutions Ltd | Information & communication | 2018 |
| Gryszko Building Ltd | Construction | 2013 |
| Gsingh Estates Ltd | Real estate | 2025 |
| Gucuk Business Ltd | Real estate | 2026 |
| Gudmax Group Ltd | Professional & scientific | 2011 |
| Guides & Vibes Ltd | Administrative & support | 2025 |
| Guinea Community Law Hub CIC | Public administration | 2026 |
| Gulab & Daughters Ltd | Real estate | 2024 |
| Gunders Properties Ltd | Real estate | 2022 |
| Guney Food Ltd | Hospitality | 2024 |
| Gurkirpa Investments Limited | Information & communication | 2014 |
| Guyana Building Inspections UK Limited | Construction | 2026 |
| GWM Holdings Limited | Professional & scientific | 2025 |
| Gyan House Educational Consultancy Ltd | Education | 2023 |
| H G Buck & Co Ltd | Professional & scientific | 2017 |
| H N S Partnership Ltd | Professional & scientific | 2023 |
| H P Pindoria Ltd | Wholesale & retail | 2010 |
| H&K Construction (London) Ltd | Construction | 2019 |
| H&L Insure Ltd | Professional & scientific | 2023 |
| H&P Consulting Services Ltd | Professional & scientific | 2024 |
| H&T Energy Solutions Ltd | Construction | 2024 |
| Hack Creative Ltd | Professional & scientific | 2019 |
| Hadler Engineering Services Ltd | Professional & scientific | 2024 |
| Hairlyft Ltd | Wholesale & retail | 2024 |
| Hales Tails Limited | Other services | 2017 |
| Halo Hawk Ltd | Wholesale & retail | 2021 |
| Hamilton Coopers (CAS) Limited | Professional & scientific | 2012 |
| Hamilton Coopers Property Limited | Financial services | 2023 |
| Hamilton Motors Limited | Administrative & support | 1999 |
| Hamra Design Limited | Information & communication | 2023 |
| Hanbury Building Services Limited | Construction | 2010 |
| Handley Pubz Ltd | Hospitality | 2019 |
| Hansri Properties Ltd | Real estate | 2024 |
| Happy Hour Limited | Arts & recreation | 2015 |
| Harbour Codecraft Limited | Information & communication | 2025 |
| Hari & SRI Properties Ltd | Real estate | 2023 |
| Harmony Property Management Limited | Real estate | 2025 |
| Hart Homes Kitchens & Bathrooms Limited | Construction | 2013 |
| Hartkho Limited | Real estate | 2020 |
| Harveys Barbers Ltd | Other services | 2015 |
| HAS & EL Limited | Real estate | 2026 |
| Hasan Ayla Limited | Health & social care | 2017 |
| Hashimont Limited | Professional & scientific | 2025 |
| Hausproud Limited | Real estate | 2019 |
| Hausproud Property Services Ltd | Other services | 2020 |
| Havaii Homes Limited | Construction | 2026 |
| Havaii Ltd | Professional & scientific | 2023 |
| Havillah Consult Services Ltd | Wholesale & retail | 2018 |
| Hawkhurst Property Ltd | Real estate | 2021 |
| Hayley Spendlove Aesthetics Ltd | Other services | 2024 |