| Gorbutt Gardens Management Limited | Households | 2014 |
| Gordano Holdings Limited | Real estate | 1962 |
| Gordon & Gotch Publishing Limited | Information & communication | 1992 |
| Gordon Court Developments Limited | Construction | 2023 |
| Gorilla Construction SW Ltd | Construction | 2019 |
| Gosling and Gosling Limited | Construction | 2019 |
| Gosling Trust | Education | 2002 |
| Gospel Hall RTM Company Limited | Households | 2022 |
| Goss (Plymouth Station) Limited | Wholesale & retail | 2012 |
| Goss Bros. Limited | Wholesale & retail | 2000 |
| Gourmet Gastrotap Limited | Administrative & support | 2015 |
| Gowerdew Limited | Construction | 1999 |
| GPH NY64 Ltd | Financial services | 2015 |
| GPQ Consulting Ltd | Construction | 2024 |
| GPQ Holdings (SW) Ltd | Financial services | 2024 |
| GPW Clarke Group Ltd | Financial services | 2025 |
| GR Westform Ltd | Construction | 2020 |
| GR8 Bars SW Ltd | Hospitality | 2026 |
| GR8 Events South West Ltd | Arts & recreation | 2024 |
| Grace 2023 Ltd | Health & social care | 2023 |
| Grace Darcey Property Limited | Real estate | 2024 |
| Gracial Beauty World Signatures Limited | Wholesale & retail | 2026 |
| Gracioushavens Limited | Health & social care | 2024 |
| Graham Dodd Investments Ltd | Wholesale & retail | 2019 |
| Grakka Limited | Wholesale & retail | 2000 |
| Grand Alpha Ltd | Construction | 2013 |
| Grand Development Property Management Limited | Real estate | 2021 |
| Grand Oak Hospitality Ltd | Hospitality | 2019 |
| Grandstake Residents Management Company Ltd | Households | 1999 |
| Grange Holdings Limited | Real estate | 1982 |
| Grapevine (the Transport Company) Ltd | Transport & logistics | 2017 |
| Grapevine Document Services Limited | Water & waste | 2023 |
| Graphicomm Digital Limited | Manufacturing | 2007 |
| Graphicomm Promotional Ltd | Wholesale & retail | 2020 |
| Grass 2 Class Limited | Education | 2018 |
| Grasshopper Corporation Limited | Financial services | 2013 |
| Gravitas Analytics Ltd | Professional & scientific | 2012 |
| Gravity Properties Limited | Real estate | 2016 |
| GRC Planning Ltd | Professional & scientific | 2020 |
| Great Court Farm Management Company Ltd | Households | 2018 |
| Great White Estates Ltd | Construction | 2026 |
| Greatgoshen Limited | Health & social care | 2024 |
| Green & Clean Devon Ltd | Administrative & support | 2026 |
| Green Alder Limited | Real estate | 2015 |
| Green Circle Bespoke Glazing Ltd | Manufacturing | 2012 |
| Green Circle Holdings Limited | Financial services | 2016 |
| Green Energy Solutions (South West) Limited | Energy | 2013 |
| Green Ocean Farming Limited | Agriculture & fishing | 2020 |
| Green Park View Limited | Real estate | 2022 |
| Green Pepper Productions Limited | Administrative & support | 2020 |
| Green Planet Ventures Ltd | Professional & scientific | 2016 |
| Green Wave Carpentry Ltd | Construction | 2017 |
| Green Way Management Company Limited | Households | 1983 |
| Greenacre Building Ltd | Construction | 2018 |
| Greenacre Developments (Devon) LLP | | 2009 |
| Greenacres (Chagford) Limited | Real estate | 2001 |
| Greenacres Management Company (Dobwalls) Limited | Households | 2018 |
| Greenbank Developments (GPG) Limited | Construction | 2025 |
| Greenbank Plymouth (Number 1) Ltd | Extraterritorial | 2008 |
| Greenbox Regeneration Ltd | Professional & scientific | 2023 |
| Greenfield Consultants Limited | Information & communication | 2014 |
| Greenfield Growth Ltd | Information & communication | 2026 |
| Greenfield Kitchens Ltd | Manufacturing | 2013 |
| Greenhouse Community Project CIC | Health & social care | 2018 |
| Greenlands Landscaping Ltd | Administrative & support | 2016 |
| Greenlight Group Holdings Ltd | Financial services | 2023 |
| Greenlight Safety Assessment Scheme Limited | Health & social care | 2018 |
| Greenlight Safety Consultancy Ltd | Health & social care | 2009 |
| Greenlight Training Limited | Health & social care | 2018 |
| Greenpoint Holdings Limited | Financial services | 2023 |
| Greenpolly Ltd | Professional & scientific | 2009 |
| Greenporth Limited | Professional & scientific | 2013 |
| Greensteps Fields Ltd | Agriculture & fishing | 2025 |
| Greentree Property Solutions Ltd | Real estate | 2023 |
| Greenwood&Beer Trading Ltd | Wholesale & retail | 2025 |
| Greenwoods Landscaping & Garden Maintenance Ltd | Administrative & support | 2008 |
| Gregor Morley Property Investments Limited | Real estate | 2021 |
| Gregory Plumbing & Heating Limited | Construction | 2005 |
| Gregsand Ltd | Wholesale & retail | 2018 |
| Gremlin Properties Limited | Real estate | 2016 |
| Grenville Garage Limited | Wholesale & retail | 2022 |
| Gresby Limited | Hospitality | 2010 |
| Grevan Cars Limited | Wholesale & retail | 1984 |
| Grierson Asset Holdings Ltd | Agriculture & fishing | 2025 |
| Griffiths Media Limited | Information & communication | 2023 |
| Grigg Marine Ltd | Construction | 2021 |
| Grillin Like a Villain Ltd | Hospitality | 2024 |
| Ground GAS Protection Ltd | Construction | 2024 |
| Groundfix Infrastructure & Surfacing Ltd | Construction | 2005 |
| Groundwork Land and Planning Limited | Professional & scientific | 2026 |
| Groundwork Solutions (SW) Ltd | Construction | 2019 |
| Grove Beard Supplies Limited | Wholesale & retail | 2024 |
| Grow 4 Good South West Ltd | Agriculture & fishing | 2011 |
| Grow Cart Limited | Wholesale & retail | 2020 |
| Grow Plymouth Ltd | Hospitality | 2021 |
| Grow Well Studios Ltd | Real estate | 2021 |
| Growth Hack Media Ltd | Professional & scientific | 2019 |
| Growth People Partners Ltd | Administrative & support | 2025 |
| GRP Roofing Southwest Limited | Construction | 2013 |
| Grsc Group Ltd | Information & communication | 2018 |