| Gozzilo Ltd | Health & social care | 2014 |
| GP Advisors Limited | Professional & scientific | 2024 |
| GP Backlinks Limited | Information & communication | 2026 |
| GPR Consulting Limited | Information & communication | 2007 |
| Grabinsky's Catering Limited | Hospitality | 2020 |
| Grace Holidays Ltd | Administrative & support | 2025 |
| Grace Home Care CK Ltd | Professional & scientific | 2025 |
| Gracegym Ltd | Education | 2025 |
| Gracelydia Care Services UK Ltd | Health & social care | 2020 |
| Gracewell Healthcare Limited | Health & social care | 2026 |
| Graham Bacon Financial Solutions Limited | Financial services | 2006 |
| Graham Bennett & Associates Ltd | Administrative & support | 1995 |
| Graham Bennett Limited | Administrative & support | 1995 |
| Graham Dance Limited | Education | 1999 |
| Graham Nicholl Tree Surgery Limited | Agriculture & fishing | 2002 |
| Grand Arbre Limited | Administrative & support | 2013 |
| Grange Management (Holdings) Limited | Professional & scientific | 1986 |
| Grangemedia Limited | Construction | 2001 |
| Grangepark Limited | | 1984 |
| Grangewood Brickwork Services Limited | Construction | 1997 |
| Grangewood Builders Limited | Construction | 1992 |
| Grangewood Interiors Limited | Professional & scientific | 2000 |
| Granite & Slate Properties Limited | Real estate | 2024 |
| Grant Allen Estate Agents Limited | Real estate | 2002 |
| Granted Giving Limited | Information & communication | 2025 |
| Grantly Partners Ltd | Professional & scientific | 2021 |
| Granville Garages of Colchester Limited | Real estate | 1972 |
| Grapeline Properties Limited | Real estate | 1999 |
| Graphic Everest Ltd | Information & communication | 2026 |
| Graphitek Ventures Ltd | Real estate | 2025 |
| Grassmore Manufacturing Limited | | 1986 |
| Gravesham Community Investment Partnership LLP | | 2023 |
| Gray & Butt Limited | | 1969 |
| Grays Dining Club Ltd | Hospitality | 2016 |
| Grays Service Station Limited | Wholesale & retail | 2005 |
| GRB Plumbing and Heating Services Limited | Construction | 2022 |
| Great Eastern Direct Mail Limited | Administrative & support | 1999 |
| Great Stony School Trust | Education | 1998 |
| Green & Clean Services Ltd | Administrative & support | 2025 |
| Green Dome Estates Ltd | Real estate | 2014 |
| Green Elephant Agency Ltd | Professional & scientific | 2021 |
| Green Lane (Ilford) Construction Ltd | Construction | 2006 |
| Green Lane Motor Spares Limited | Wholesale & retail | 1996 |
| Green Lanes N8 Limited | Real estate | 2018 |
| Green Shield Cyber Security Ltd | Information & communication | 2025 |
| Green Signals Consulting Limited | Transport & logistics | 2012 |
| Green Street Consulting Limited | Professional & scientific | 2018 |
| Greenacre Smallholdings Limited | Manufacturing | 1948 |
| Greenback Management Ltd | Financial services | 2024 |
| Greenbrook Electrical Limited | Extraterritorial | 1952 |
| Greenco Construction Ltd | Construction | 2023 |
| Greenco Holdings Limited | Financial services | 2021 |
| Greenes Gym Ltd | Arts & recreation | 1993 |
| Greenfield Coffins Ltd | Manufacturing | 2006 |
| Greenglove Limited | Construction | 2015 |
| Greenland Care Ltd | Health & social care | 2020 |
| Greenleafe Electrical Services Limited | Construction | 2017 |
| Greenstar Health Limited | Health & social care | 2025 |
| Greenstone Services Limited | Construction | 2026 |
| Greenvita-Bioboost Limited | Wholesale & retail | 2025 |
| Greenwich Designerglasses Limited | Transport & logistics | 2005 |
| Grenfell Heating Co. Limited | | 1968 |
| Grent Estates Limited | Real estate | 1936 |
| Grice Engineering Limited | Manufacturing | 2021 |
| Grid Team Services Limited | Manufacturing | 2004 |
| Griffin Elevators Limited | Construction | 1999 |
| Grimzeal Limited | Wholesale & retail | 2025 |
| Gritex Limited | Wholesale & retail | 2000 |
| Groomes Court (Halstead) Residents' Association Limited | Real estate | 1990 |
| Groove Ltd | Wholesale & retail | 2026 |
| Groovy Pumpkins Limited | Administrative & support | 2000 |
| Grosvenor Lawn Tennis Club Limited | Arts & recreation | 1930 |
| Grosvenor Programme Services Limited | Information & communication | 2006 |
| Groundforce Building Services Limited | Construction | 1999 |
| Group 151 Ltd | Real estate | 2025 |
| Groves and Sehmi Associates Limited | Administrative & support | 1998 |
| Grownco Limited | Professional & scientific | 2025 |
| Growtrack Limited | Professional & scientific | 1996 |
| GRQ Technologies Limited | Manufacturing | 2003 |
| GRS Financial Consultants Limited | Financial services | 2001 |
| GRS Quality Services Ltd | Information & communication | 2024 |
| GS Group of Company Limited | Hospitality | 2026 |
| GSC Herts Limited | Wholesale & retail | 2024 |
| GSR Property Ltd | Real estate | 2022 |
| GTE Property Limited | Real estate | 2019 |
| Guaiye Fashion Ltd | Wholesale & retail | 2025 |
| Guardian Industrial Doors Limited | Manufacturing | 1979 |
| Guardian Sales (South) Limited | | 1986 |
| GUARDSQUARDK9 Ltd | Administrative & support | 2024 |
| Guest Golf Limited | Extraterritorial | 2006 |
| Guestlist Social Media Limited | Information & communication | 2024 |
| Guilty Gadgets Limited | Wholesale & retail | 2013 |
| Guital Ltd | Wholesale & retail | 2022 |
| Guja Limited | Wholesale & retail | 2024 |
| Gujjify Ltd | Wholesale & retail | 2025 |
| Gulalai Ventures Ltd | Wholesale & retail | 2026 |
| Gullu Catering Ltd | Hospitality | 2014 |
| Gulman Consultants Limited | Real estate | 1977 |
| Guru Soundz Limited | Administrative & support | 2008 |
| Guru World Traders Ltd | Wholesale & retail | 2015 |