| Godden Technologies Ltd | Information & communication | 2022 |
| Godshill Homes Limited | Real estate | 2017 |
| Gofal Holdings Limited | Health & social care | 2025 |
| GOL Centres (Newport) Limited | Arts & recreation | 2024 |
| Golbasi (Newport) Ltd | Hospitality | 2019 |
| Gold Security Standard Limited | Administrative & support | 2021 |
| Goldcliff Stud Ltd | Agriculture & fishing | 2025 |
| Goldcroft on the Common Ltd | Hospitality | 2024 |
| Golden Accommodation Limited | Hospitality | 2017 |
| Golden AGE Kitchen Ltd | Wholesale & retail | 2026 |
| Golden Kebab Ltd | Hospitality | 2018 |
| Golden Leads Limited | Agriculture & fishing | 2018 |
| Golden Meats Ltd | Manufacturing | 2022 |
| Golden Oaks Software Limited | Information & communication | 2026 |
| Golden PIZZA165 Limited | Hospitality | 2025 |
| Golden Shop Vape Sweets Ltd | Other services | 2025 |
| Golden Thread Films Limited | Information & communication | 2017 |
| Golden Valley Cycleworks Ltd | Manufacturing | 2025 |
| Golden Vape Shop Ltd | Wholesale & retail | 2025 |
| Golding Joinery Limited | Construction | 2003 |
| Goldmine Jewellers 2020 Limited | Wholesale & retail | 2020 |
| Goldsmoor Property Ltd | Real estate | 2023 |
| Goldstone Capital Ltd | Real estate | 2019 |
| Goldtops Studios Ltd | Information & communication | 2025 |
| Golf Union of Wales Limited | Arts & recreation | 2006 |
| Gooa Ltd | Information & communication | 2019 |
| Good Healing Source UK Ltd | Wholesale & retail | 2022 |
| Good Karma Media Limited | Professional & scientific | 2019 |
| Goodall Holdings Limited | Financial services | 2025 |
| Goodall Retreats Ltd | Real estate | 2025 |
| Goodall Roofing (IW) Limited | Construction | 2014 |
| Goodbourn Engineering Limited | Professional & scientific | 2014 |
| Goodbye J O B Limited | Real estate | 2014 |
| Goodness & Wonder Ltd | Wholesale & retail | 2014 |
| Goodsberg Ltd | Transport & logistics | 2024 |
| Goodwin & Boyce Ltd | Real estate | 2016 |
| Goodwin & Goodwin Ltd | Health & social care | 2014 |
| Goodwin Renovations Limited | Construction | 2021 |
| Gordon Court Ryde (Management Company) Limited | Households | 1988 |
| Gorgeous Grooms (Newport) Ltd | Other services | 2025 |
| Gorgon Crafts Ltd | Manufacturing | 2018 |
| Gorilla Flooring Ltd | Construction | 2023 |
| Gorilla Golf Grips Ltd | Wholesale & retail | 2017 |
| Gorilla-Build Limited | Construction | 2022 |
| Gormley Properties Limited | Real estate | 2018 |
| Gosberton Road Residents Association Limited | Households | 2000 |
| Gossmakeup Limited | Other services | 2012 |
| GOT Zero PV Limited | Manufacturing | 2026 |
| Gottalife Productions Ltd | Information & communication | 2000 |
| Gourmet Grazing Limited | Hospitality | 2021 |
| Governance Assured UK Limited | Professional & scientific | 2017 |
| Goytre Car Company Limited | Wholesale & retail | 2012 |
| GP07 Limited | Arts & recreation | 2025 |
| GR & DR Limited | Manufacturing | 2025 |
| Grace & Co Cleaning Solutions CYF | Administrative & support | 2026 |
| Grace & Concept Ltd | Manufacturing | 2016 |
| Graceful Acceptance Ltd | Health & social care | 2024 |
| Grafikroom Limited | Administrative & support | 2011 |
| Grafton Gardens Residents Association Limited | Households | 1975 |
| Graham Metal Solutions Ltd | Wholesale & retail | 2013 |
| Graham Recycling Group Ltd | Water & waste | 2022 |
| Graham's Recycling Group Limited | Financial services | 2013 |
| Graham's Recycling Services Limited | Water & waste | 1997 |
| Graig Wenallt Limited | Construction | 2023 |
| Grail Developments Limited | Real estate | 2007 |
| Graingers & SON (Newport) Limited | Wholesale & retail | 1961 |
| Graingers Builders Supply Limited | Professional & scientific | 1961 |
| Grammont Partners Limited | Financial services | 2020 |
| Grampsyboi Ltd | Professional & scientific | 2020 |
| Grand Floridian Limited | Administrative & support | 2025 |
| Grand National Archery Society(The) | Arts & recreation | 1977 |
| Grandee Care Ltd | Administrative & support | 2019 |
| Grandeur Jewellery Ltd | Wholesale & retail | 2022 |
| Grandy Groundworks Ltd | Construction | 2019 |
| Grantham Court Residents Management Company Limited | Households | 1996 |
| Grantlife Cladding Ltd | Administrative & support | 2020 |
| Grantlife Properties Limited | Real estate | 2021 |
| Grantlife Self Storage Ltd | Real estate | 2023 |
| Granville (Isle of Wight) Management Company Limited | Households | 1995 |
| Granville Court (Totland) Limited | Households | 2010 |
| Granville Flats Limited | Households | 1973 |
| Grate Choice Fires and Fireplaces Ltd | Wholesale & retail | 2009 |
| Graybons Ltd | Professional & scientific | 2016 |
| Graypen Cymru Limited | Professional & scientific | 2012 |
| Graypen Group Cymru Limited | Professional & scientific | 2016 |
| Grazeitco CYF | Wholesale & retail | 2025 |
| Great Bear Capital Limited | Financial services | 2026 |
| Great Chatwell Academy of Learning Limited | Professional & scientific | 2017 |
| Great Chatwell Limited | Professional & scientific | 2017 |
| Great Fishing Company Ltd | Wholesale & retail | 2003 |
| Great Indian Cuisine Ltd | Wholesale & retail | 2024 |
| Great Newra Transport & Recycling Ltd | Water & waste | 2011 |
| Great Porton Agricultural Limited | Agriculture & fishing | 2017 |
| Great Shine Limited | Wholesale & retail | 2025 |
| Great Western Abergavenny Ltd | Hospitality | 2021 |
| Greater Heights Healthcare Ltd | Health & social care | 2022 |
| Greattony Associates Ltd | Transport & logistics | 2019 |
| Greattony Consulting Limited | Professional & scientific | 2015 |
| Green 65 IOW Ltd | Hospitality | 2020 |
| Green Acre Solutions Limited | Construction | 2016 |