| GRC360 Ltd | Information & communication | 2010 |
| Great City Lights Limited | Construction | 2016 |
| Great Comcat Engineering Ltd | Manufacturing | 2020 |
| Great Point Developments Limited | Real estate | 2021 |
| Great Tyres UK Ltd | Wholesale & retail | 2017 |
| Greater London Living CIC | Hospitality | 2020 |
| Greater London Solutions Provider Ltd | Professional & scientific | 2012 |
| Green Cidar Limited | Hospitality | 2020 |
| Green Electrics Limited | Wholesale & retail | 2018 |
| Green Holidays Ltd | Administrative & support | 2019 |
| Green Image Landscaping and General Contracting Ltd | Wholesale & retail | 2025 |
| Green Industree Ltd | Administrative & support | 2018 |
| Green Land 2 YOU Ltd | Administrative & support | 2026 |
| Green Lane Autos Ltd | Wholesale & retail | 2016 |
| Green Lane Barbers Ltd | Other services | 2025 |
| Green Lane Pre-School Limited | Education | 2019 |
| Green Miracle Ltd | Wholesale & retail | 2020 |
| Greenbe Ltd | Wholesale & retail | 2022 |
| Greenbeam Trading & Contracting UK Ltd | Construction | 2024 |
| Greencut Construction Ltd | Construction | 2024 |
| Greendor Consultancy & Services Ltd | Education | 2014 |
| Greener Consultancy Limited | Information & communication | 2017 |
| Greenlight Developments (Canterbury) Limited | Construction | 2016 |
| Greenlight London Holdings Limited | Financial services | 2016 |
| Greenwall Consultancy Ltd | Professional & scientific | 2019 |
| Grill Culture Ltd | Hospitality | 2022 |
| Grillets 1 Ltd | Hospitality | 2026 |
| Grinders Vault Ltd | Education | 2025 |
| GRLMANAGEMENT7323 Ltd | Administrative & support | 2024 |
| Grnr Construction Ltd | Construction | 2025 |
| Grofinition Ltd | Other services | 2021 |
| Grom Ventures Limited | Health & social care | 2019 |
| Ground Technical Solutions Ltd | Professional & scientific | 2018 |
| Ground Work First Limited | Real estate | 2017 |
| Grove Cleaners Limited | Other services | 2018 |
| Grove DRY Cleaners Ltd | Other services | 2022 |
| Grove Holds Ltd | Financial services | 2024 |
| Grove PI Ltd | Real estate | 2024 |
| Gshi AMZ Ltd | Wholesale & retail | 2025 |
| GSN Property Management Ltd | Real estate | 2025 |
| Guidance Finance Ltd | Professional & scientific | 2017 |
| Guildford Dental & Implant Suite Ltd | Health & social care | 2025 |
| Gujjar Trade Ltd | Wholesale & retail | 2020 |
| GUL Leather Limited | Wholesale & retail | 2022 |
| Gulev 222 Ltd | Construction | 2022 |
| Gulf Industrial Technical Solution Contracting Co Limited | Construction | 2023 |
| Gulf Pink Diamond Limited | Construction | 2023 |
| Gulzar General Contracting Company Ltd | Construction | 2023 |
| Gungah Property Holdings Limited | Real estate | 2025 |
| Gunterstone Studio Limited | Wholesale & retail | 2017 |
| Gurmani Limited | Wholesale & retail | 2026 |
| GVG Global Group Ltd | Construction | 2023 |
| GVN Cleaning Services Ltd | Transport & logistics | 2025 |
| Gymdata Limited | Arts & recreation | 2014 |
| H & F Xpress Ltd | Hospitality | 2026 |
| H & I Services Ltd | Wholesale & retail | 2022 |
| H & Z Traders Ltd | Construction | 2019 |
| H Akram Ltd | Health & social care | 2017 |
| H K Grocers Ltd | Wholesale & retail | 2015 |
| H Legacy Homes Limited | Construction | 2025 |
| H&G Building Solutions Ltd | Construction | 2023 |
| H&M Exotic Fruit and VEG Limited | Wholesale & retail | 2018 |
| H&T Construction Ltd | Construction | 2023 |
| H. a. Imperial Limited | Wholesale & retail | 2024 |
| H.S.A New Consulting Generation Ltd | Administrative & support | 2024 |
| H.S.A Trading Ltd | Transport & logistics | 2021 |
| HA Food Services Ltd | Hospitality | 2019 |
| HA Mahzouz Property Ltd | Real estate | 2017 |
| HA Transport Ltd | Transport & logistics | 2019 |
| Haac International Ltd | Professional & scientific | 2025 |
| Haad Trading Ltd | Transport & logistics | 2018 |
| Habb Trading Ltd | Transport & logistics | 2023 |
| Habib and Sons Trading Limited | Wholesale & retail | 2025 |
| Habitat Expert Limited | Construction | 2015 |
| Habiton Ltd | Wholesale & retail | 2018 |
| Hacche Ltd | Wholesale & retail | 2019 |
| Hades London Property Ltd | Real estate | 2024 |
| Hades Plumbing Ltd | Construction | 2019 |
| Hadia Business Contracting Company Ltd. | Construction | 2021 |
| HAE Trading Ltd | Wholesale & retail | 2025 |
| Haevon Traders Ltd | Wholesale & retail | 2026 |
| Hail Trading Ltd | Transport & logistics | 2023 |
| Hailians Global Accountants Ltd | Professional & scientific | 2019 |
| Hair by SHE Ltd | Other services | 2025 |
| Hair Definition Ltd | Other services | 2021 |
| Hair Headquaters London Ltd | Other services | 2022 |
| Hala Textile Industries Ltd | Wholesale & retail | 2022 |
| Halal & Halal Ltd | Hospitality | 2018 |
| Halal Meat Mahal Limited | Wholesale & retail | 2025 |
| Halocarz Ltd | Transport & logistics | 2023 |
| HAM Common Newco Limited | Wholesale & retail | 2025 |
| Hamars Limited | Transport & logistics | 2023 |
| Hamcrown Limited | Construction | 2002 |
| Hamdan Global Limited | Construction | 2024 |
| Hamg Management Consultancy Ltd | Professional & scientific | 2025 |
| Hamz Foods Limited | Hospitality | 2025 |
| Hamza Holds Ltd | Financial services | 2023 |
| Hamza Trading Ltd | Health & social care | 2016 |
| Hanari Studios Ltd | Other services | 2021 |
| Hands Hunters Ltd | Other services | 2011 |