| Gekko Partners Ltd. | Professional & scientific | 2002 |
| Gelarto UK Limited | Hospitality | 2014 |
| Gelativity Ltd | Manufacturing | 2025 |
| Gelidus Holdings Limited | Financial services | 2025 |
| Gemerals Ltd | Wholesale & retail | 2022 |
| Gemmab.Coaching Ltd | Other services | 2024 |
| Genesis Games Limited | Information & communication | 2002 |
| Genesis I.T. Training Limited | Professional & scientific | 2001 |
| Geoffrey Deacon Training Ltd | Agriculture & fishing | 2004 |
| George Scott Racing Limited | Arts & recreation | 2018 |
| George Street (Kingsclere) Management Company Limited | Households | 1995 |
| Geraldine Wilson Associates Ltd | Extraterritorial | 2019 |
| GET Insight Ltd | Real estate | 2014 |
| Geth Holdings Limited | Financial services | 2025 |
| GG Hurst Ltd | Professional & scientific | 2020 |
| GH Hospitality Ltd | Professional & scientific | 2019 |
| Ghassans Ltd | Hospitality | 2024 |
| GHE Estates Ltd | Construction | 2021 |
| GHE Homes Ltd | Real estate | 2005 |
| GHE JA SPV1 Ltd | Real estate | 2020 |
| GHE Solar Limited | Construction | 2010 |
| Ghoubhil Cabs Ltd | Transport & logistics | 2025 |
| Gibbs Associates Ltd | Agriculture & fishing | 2025 |
| Gibson & Co (Interiors) Limited | Construction | 2008 |
| Giftpop Limited | Wholesale & retail | 2013 |
| Giles Tooley & Co. Limited | Real estate | 2001 |
| Ginkgo Leaf Garden Design Ltd | Administrative & support | 2023 |
| Gipto Limited | Administrative & support | 2025 |
| Girard Lettings Limited | Real estate | 2011 |
| Give Children Their Childhood Back Ltd | Public administration | 2025 |
| Gjrm Consulting Ltd | Professional & scientific | 2022 |
| GKB Electronics Limited | Manufacturing | 2000 |
| Gladelight Limited | Information & communication | 2010 |
| Gladpower Limited | Extraterritorial | 1997 |
| Glass Phoenix Events Ltd | Other services | 2021 |
| Glassboxx Group Limited | Information & communication | 2025 |
| Glassboxx Limited | Information & communication | 2019 |
| Glenson Electric Services Limited | Construction | 2025 |
| Global Continuity Limited | Administrative & support | 2002 |
| Global Continuity Ventures Limited | Financial services | 2008 |
| Global Freesports Limited | Extraterritorial | 2011 |
| Global Leadership 21 Ltd | Professional & scientific | 2009 |
| Global Prime Associates Ltd | Professional & scientific | 2017 |
| Global Retailing Solutions Ltd | Administrative & support | 2018 |
| Global Rosters Limited | Financial services | 2012 |
| Globaling Ltd | Wholesale & retail | 2015 |
| Glory HOG Ltd | Manufacturing | 2025 |
| Gloucester Green Ltd | Information & communication | 2017 |
| Gloucester Walk Limited | Professional & scientific | 2014 |
| Glsm Ltd | Extraterritorial | 2013 |
| GMC Associates Limited | Professional & scientific | 1999 |
| GNH Investco Limited | Financial services | 2006 |
| GNS Corporation Limited | Hospitality | 2022 |
| Go Green Cabs Ltd | Transport & logistics | 2023 |
| Gocl Bidco Limited | Financial services | 2024 |
| Godbole Field Properties Limited | Real estate | 2025 |
| Goddard Brown Limited | Professional & scientific | 2017 |
| Godwins Plumbing & Heating Ltd | Construction | 2025 |
| Gold and Grey Services Limited | Information & communication | 2021 |
| Gold Build South Ltd | Construction | 2025 |
| Gold Spot London Limited | Hospitality | 2019 |
| Golden Crab Film Production Limited | Information & communication | 2017 |
| Golden Gate Builders Ltd | Construction | 2026 |
| Golden Thread Solutions Ltd | Information & communication | 2022 |
| Goldfinch Apartments Ltd | Construction | 2017 |
| Goldfinch Crown House Limited | Real estate | 2021 |
| Goldfinch Homes Limited | Construction | 2014 |
| Goldfinch Management (Newbury) Ltd | Real estate | 2016 |
| Goldjesley Ltd | Households | 2014 |
| Good Stayz Limited | Hospitality | 2025 |
| Good Vibes Music Academy CIC | Education | 2023 |
| Goodhomes Care Services Ltd | Health & social care | 2024 |
| Goodhomes Properties Ltd | Real estate | 2023 |
| Goose Hill Holdings Limited | Extraterritorial | 2016 |
| Gordon Hackett Designs Limited | Real estate | 2003 |
| Gordon House Partners | | 2002 |
| Gordons Recruitment Limited | Administrative & support | 2017 |
| Gorseland Flats Limited | Extraterritorial | 1969 |
| Gorselands Management Limited | Households | 2018 |
| Gosch Ltd | Construction | 2023 |
| Gotelee Limited | Manufacturing | 1972 |
| Gotelee Printing (Wokingham) Limited | Manufacturing | 1989 |
| Gothick Software Limited | Professional & scientific | 2005 |
| Gould Composite Group Limited | Financial services | 2026 |
| Gould Composites Ltd | Professional & scientific | 2014 |
| Gould Holdings Ltd | Manufacturing | 2018 |
| Goulden Management Limited | Agriculture & fishing | 1977 |
| Grafos Communications Ltd | Professional & scientific | 2021 |
| Graham Bell Complete Interiors Limited | Construction | 2004 |
| Granary West Mills Newbury Management Limited(The) | Households | 1983 |
| Grand Union Narrowboats Ltd | Manufacturing | 2017 |
| Grando Europe Ltd | Manufacturing | 2025 |
| Grange Court Residents' Association (Newbury) Limited | Households | 1975 |
| Grange Farm Residents Company Limited | Households | 2001 |
| Grant Investments and Developments Ltd | Real estate | 2025 |
| Grantbourne Limited | Construction | 2011 |
| Gravitas 001 Limited | Real estate | 2015 |
| Gravitas Business Communications Limited | Professional & scientific | 2006 |
| Gray Networks Limited | Information & communication | 2022 |
| Graystone Strategy Ltd | Information & communication | 2014 |