| Grace (Private Clients) Limited | Real estate | 2019 |
| Grace and Fire LLP | | 2021 |
| Grace Organic Village Ltd | Wholesale & retail | 2025 |
| Gracecliffe Developments Limited | Construction | 2021 |
| Grade UP International Ltd | Information & communication | 2025 |
| Grade With Ltd | Wholesale & retail | 2024 |
| Gradewithtag Ltd | Administrative & support | 2024 |
| Grafton Civils & Construction Limited | Construction | 2020 |
| Grafton Maintenance Limited | Households | 2022 |
| Graham Wilson Plumbing & Heating Limited | Administrative & support | 2016 |
| Grahame Butcher Logistics Limited | Transport & logistics | 2026 |
| Grain People of Ghanaian Heritage Community Interest Company | Health & social care | 2025 |
| Grand Retail Solutions Limited | Wholesale & retail | 2006 |
| Granemore Group Ltd. | Construction | 2006 |
| Grange Estates (Midlands) Limited | Construction | 2000 |
| Grange Installations Limited | Construction | 2022 |
| Grange Transport Ltd | Transport & logistics | 2015 |
| Grangewell Investments Ltd | Real estate | 2002 |
| Grass & Co Limited | Wholesale & retail | 2018 |
| Gravel and Gears Limited | Wholesale & retail | 2025 |
| Gravel Stabilisers UK Ltd | Administrative & support | 2015 |
| Gravener General Builder Limited | Administrative & support | 2011 |
| Gravitilab Aerospace Services Limited | Professional & scientific | 2018 |
| Gray & Chalmers Property Ltd | Hospitality | 2026 |
| Graymatter Media Limited | Administrative & support | 2003 |
| Grays Rentals & Sales Ltd | Wholesale & retail | 2023 |
| Grbcic Consultancy Limited | Health & social care | 2008 |
| Greanbase Ltd | Manufacturing | 2011 |
| Great Eastern Service Company Limited | Other services | 2020 |
| Great Scott! Management Limited | Professional & scientific | 2020 |
| Greedy Gordons Limited | Hospitality | 2018 |
| Green Bean Development Company Limited | Construction | 2010 |
| Green Infrastructure Ltd | Administrative & support | 2009 |
| Green Roof Solutions Limited | Extraterritorial | 1982 |
| Green Valley Foods Limited | Hospitality | 2025 |
| Green Valley Trading and Investment Limited | Wholesale & retail | 2024 |
| Greenbean Investments Limited | Financial services | 2025 |
| Greenbean Property Management Ltd | Real estate | 2017 |
| Greenbox Compliance Limited | Public administration | 2024 |
| Greencivilian Limited | Wholesale & retail | 2018 |
| Greenfield Properties (UK) Limited | Real estate | 2001 |
| Greenfisher Contracting Ltd | Construction | 2019 |
| Greenfisher Holdings Ltd | Financial services | 2019 |
| Greenfisher Plant Ltd | Administrative & support | 2019 |
| Greenheart Endurance Ltd | Professional & scientific | 2024 |
| Greenmark Properties Limited | Households | 1997 |
| Greensbury Farm Management Limited | Households | 2014 |
| Greenside Langley Management Limited | Households | 2026 |
| Gresham Considine LLP | | 2012 |
| Gresham Support Services Limited | Professional & scientific | 2009 |
| Gretton Brook Estates Limited | Construction | 2007 |
| Grey Cat Consulting Ltd | Professional & scientific | 2021 |
| Greystone Contracting Limited | Construction | 2006 |
| Greystone Heritage Ltd | Construction | 2020 |
| GRI Automotive Ltd | Wholesale & retail | 2023 |
| GRI Contract Services Limited | Administrative & support | 2007 |
| Griffin Payroll Accountancy Ltd | Professional & scientific | 2026 |
| Griffin Payroll LLP | | 2017 |
| Grifto Trading Limited | Wholesale & retail | 2024 |
| Grikis Ltd. | Wholesale & retail | 2015 |
| Groovy Garage Limited | Wholesale & retail | 2018 |
| Groovy Garage Stores Ltd | Wholesale & retail | 2024 |
| Grosvenor Contracts Leasing Limited | Wholesale & retail | 1981 |
| Grosvenor Decorating Services Ltd | Construction | 2026 |
| Grounds Training Limited | Education | 2020 |
| Groundwork Northamptonshire | Other services | 2006 |
| Grove (CAP) Limited | Construction | 2025 |
| Grove (Charlton Adam) Limited | Construction | 2020 |
| Grove (Keinton Mandeville) Limited | Construction | 2026 |
| Groveshores Limited | Real estate | 1984 |
| Grow Digitally Ltd | Information & communication | 2025 |
| Grow Wild Outreach CIC | Health & social care | 2021 |
| Growmad Ltd | Education | 2014 |
| Growth Consulting Limited | Real estate | 2003 |
| GRS Decorating Ltd | Construction | 2018 |
| GS Automotive Services Ltd | Wholesale & retail | 2016 |
| GSS Asset Management Ltd | Real estate | 2022 |
| GSS Automotive Limited | Wholesale & retail | 2022 |
| GSS Developments LLP | | 2022 |
| GTA Consultancy Group Limited | Professional & scientific | 2023 |
| Guess Broadcast Management Limited | Professional & scientific | 2021 |
| Guestready Cornwall Ltd. | Administrative & support | 2021 |
| Gulzar Ghouri Ltd | Public administration | 2021 |
| Guni IT Solutions Ltd | Wholesale & retail | 2025 |
| Gursahib PBX Limited | Construction | 2026 |
| Gurteen Procurement Solutions Limited | Professional & scientific | 2014 |
| GUS PS Logistics Ltd | Transport & logistics | 2025 |
| Gutterflow Services Ltd | Administrative & support | 2022 |
| Gybe Engineering Ltd | Professional & scientific | 2025 |
| GYE Nyame Enterprise Ltd | Hospitality | 2022 |
| Gymblok Ltd | Arts & recreation | 2021 |
| H & a Medical Services Limited | Health & social care | 2021 |
| H & M Carpentry Islip Limited | Administrative & support | 2013 |
| H & P (2004) Limited | Administrative & support | 2004 |
| H and Co Enterprise Ltd | Hospitality | 2026 |
| H Dunbar Brickwork Limited | Construction | 2015 |
| H Management Ltd | Information & communication | 2015 |
| H-J Safety Consultancy Ltd | Professional & scientific | 2015 |
| H.A.B & Sons Ltd | Professional & scientific | 2015 |
| H.B. Humphries & Company Limited | Manufacturing | 1979 |