| Go Wire Electrical Solutions Midlands Limited | Construction | 2017 |
| Goddard Self Storage Ltd | Administrative & support | 2010 |
| Goddard Warehousing Limited | Transport & logistics | 1976 |
| Godirect Associates Ltd | Real estate | 2009 |
| Godsway Limited | Real estate | 2026 |
| Gold Dale Limited | Construction | 1997 |
| Gold Starz Dance School Ltd | Arts & recreation | 2018 |
| Golden House 6 Limited | Hospitality | 2026 |
| Golden Keys Homes Limited | Real estate | 2023 |
| Golden Transport Limited | Transport & logistics | 2021 |
| Golden Vision Tutors Ltd | Education | 2017 |
| Gomex Saws and Tooling Ltd | Wholesale & retail | 2017 |
| Gomovo Ltd | Information & communication | 2026 |
| Good Food by Liliane Ltd | Hospitality | 2025 |
| Goodben Limited | Transport & logistics | 2024 |
| Goodcarers Limited | Administrative & support | 2026 |
| Goodwin's Property Services Ltd | Construction | 2023 |
| Goose Hospitality Limited | Professional & scientific | 2025 |
| Gordon Noble (Builders) Limited | Construction | 1969 |
| Gorter Roof Hatches. Ltd | Other services | 2025 |
| Gove Weeding Limited | Administrative & support | 2017 |
| Govind Medical Ltd | Health & social care | 2024 |
| GP Lifts Ltd | Manufacturing | 2021 |
| Grace & Mane Ltd | Health & social care | 2024 |
| Grace Bloom Wellness.Co.Uk Ltd | Health & social care | 2026 |
| Grace Line Limited | Transport & logistics | 2025 |
| Grace-Vic Consulting Limited | Health & social care | 2015 |
| Grace-Vic Treasures Limited | Wholesale & retail | 2025 |
| Gracious Hair and Beauty Limited | Other services | 2017 |
| Gracious Supported Living Ltd | Health & social care | 2023 |
| Gragla Ltd | Professional & scientific | 2022 |
| Graham Holmes Astraseal Limited | Manufacturing | 1991 |
| Grainfold Limited | Construction | 2014 |
| Grand Fortuna UK Ltd | Wholesale & retail | 2013 |
| Grange Farm Close Management Limited | Administrative & support | 2024 |
| Grange Park Flooring Limited | Other services | 2019 |
| Grants Grabs Ltd | Water & waste | 2022 |
| Gratare&Cleaning Ltd | Wholesale & retail | 2020 |
| Gravity Lift Services Ltd | Construction | 2024 |
| Grd.Invest. Ltd | Transport & logistics | 2019 |
| Green Corner Shops Ltd | Wholesale & retail | 2025 |
| Green Grasshopper Limited | Hospitality | 2024 |
| Green Life Foods Ltd | Hospitality | 2023 |
| Green Plant Coffee Ltd | Manufacturing | 2024 |
| Green Precision Ltd. | Professional & scientific | 2014 |
| Green Shield Roofing Ltd | Construction | 2026 |
| Green Trans Limited | Transport & logistics | 2026 |
| Green Tulip Limited | Wholesale & retail | 2006 |
| Greenbarn Limited | Professional & scientific | 2003 |
| Greencold Limited | Manufacturing | 2005 |
| Greengate Software Solutions Limited | Information & communication | 2018 |
| Greenman Films Ltd | Information & communication | 2025 |
| Greenpump Ltd | Administrative & support | 2017 |
| Greenserve Cleaning Services (Northampton) Limited | Administrative & support | 1993 |
| Grendon Surveying Limited | Professional & scientific | 2024 |
| Grendon United Ltd | Arts & recreation | 2025 |
| Grey-Properties and Real Estate Ltd | Real estate | 2023 |
| Gridwell Group Limited | Financial services | 2025 |
| Grimmett & Co Limited | Real estate | 2022 |
| Ground-Tech Group Limited | Construction | 2026 |
| Group BSD Ltd | Administrative & support | 2020 |
| Group Sales Limited | Professional & scientific | 2005 |
| Grove Accountants Limited | Professional & scientific | 2022 |
| Grove Street Community Limited | Real estate | 2004 |
| Grwrady Ltd | Professional & scientific | 2019 |
| GSR Automotive Ltd | Wholesale & retail | 2014 |
| Guardian Light Enterprises Ltd | Real estate | 2025 |
| Gudea Ltd | Financial services | 2024 |
| Guerrilla Simulation Ltd | Information & communication | 2024 |
| Guillotine Solutions Holdings Ltd | Financial services | 2022 |
| Guillotine Solutions Ltd | Manufacturing | 2009 |
| GUN Barbers Ltd | Other services | 2018 |
| GVB Property Group Ltd | Financial services | 2017 |
| GVB Property Investments Ltd | Real estate | 2017 |
| GVB Retail Ltd | Wholesale & retail | 2024 |
| Gypsy Technical Services Ltd | Construction | 2022 |
| H & T Health Care and Consultancy Ltd | Health & social care | 2013 |
| H and B Autos Ltd | Professional & scientific | 2026 |
| H and H Food and Catering Services Ltd | Hospitality | 2025 |
| H and P Property Partners Ltd | Real estate | 2025 |
| H B Optometry Ltd | Wholesale & retail | 1997 |
| H Factor Solutions Ltd | Information & communication | 2025 |
| H Knot Limited | Extraterritorial | 2012 |
| H M Ward Property Limited | Real estate | 2024 |
| H&M Paint Spraying Ltd | Construction | 2022 |
| H.A.M Civils Limited | Construction | 2017 |
| H.B.C. Coachworks Limited | | 1987 |
| Habitat Transport Ltd | Transport & logistics | 2016 |
| Hackney Property Group Limited | Real estate | 2025 |
| Hadies Limited | Health & social care | 2023 |
| Hair IT IS (MK) Limited | Other services | 2018 |
| Hair Therapy Academy Ltd | Other services | 2025 |
| Hairbear Creative Ltd | Information & communication | 2019 |
| Haja Mariama Juldeh and Aminata Yarie (Hmjay) Business and Accountancy Consultancy Ltd | Professional & scientific | 2020 |
| Hajj Umrah Bookings Ltd | Administrative & support | 2025 |
| Halcyon Plastics Limited | Manufacturing | 1978 |
| Haldenpolishing Ltd | Wholesale & retail | 2025 |
| Halford Gardens Limited | Administrative & support | 2019 |
| Hall Tech Limited | Administrative & support | 2008 |
| Halloween House Entertainment Ltd | Administrative & support | 2023 |