| Evans Cleaning Services Limited | Agriculture & fishing | 2002 |
| Eventprofslive Limited | Administrative & support | 2018 |
| Evergreen Waste Management Services Ltd | Water & waste | 2014 |
| Ewrc Associates Ltd | Information & communication | 2015 |
| Executive Influence Limited | Information & communication | 2021 |
| Expressive Arts Advisors Limited | Education | 2022 |
| F & H Jones Limited | Real estate | 2014 |
| F2 Limited | Information & communication | 1997 |
| Farm First Veterinary Services Limited | Professional & scientific | 2008 |
| Featherstone-Marsh Limited | Real estate | 2002 |
| Feisty Goat Ltd | Real estate | 2025 |
| Felix Roofing Ltd | Construction | 2022 |
| Ferry Care Limited | Health & social care | 2011 |
| Field and Forest Track Livery Ltd | Agriculture & fishing | 2022 |
| Fine & Country (Monmouthshire) LLP | | 2019 |
| Finest Touch (Berkshire) Limited | Administrative & support | 2014 |
| Firebox Solution Ltd | Professional & scientific | 2019 |
| First Quad Ltd | Financial services | 2022 |
| Fitrock Limited | Real estate | 2020 |
| Fitzmaurice Investments Ltd | Financial services | 2018 |
| Fitzrippin Ltd | Real estate | 2024 |
| Fitzstone Limited | Financial services | 2023 |
| Five Oaks Care Limited | Health & social care | 2017 |
| Five Potatoes High Limited | Information & communication | 2025 |
| FIX OR Fit Ltd. | Construction | 2020 |
| Flooring Solutions and Maintenance Limited | Construction | 2013 |
| Florence Cottage Limited | Administrative & support | 2012 |
| Flower Trading Limited | Professional & scientific | 2020 |
| FMS Assets Limited | Financial services | 2026 |
| FMT3 Ltd | Administrative & support | 2026 |
| Fonseca Solicitors Ltd | Professional & scientific | 2022 |
| Fools Gold Ltd | Other services | 2024 |
| Foots OK Limited | Agriculture & fishing | 2003 |
| Formant Limited | Professional & scientific | 2018 |
| Foxma Ltd | Information & communication | 2022 |
| Foxtail Oak Ltd | Manufacturing | 2020 |
| FOY Williams Estate Agents Limited | Real estate | 2012 |
| FP Pharmacy Locum Ltd | Professional & scientific | 2011 |
| FR Ball Property Investment Limited | Other services | 2018 |
| Franks Wright Holdings Limited | Financial services | 2026 |
| Freeform Office Furniture Limited | Manufacturing | 1986 |
| Frutto Technology Limited | Manufacturing | 2022 |
| Full Circle Recycling Ltd | Water & waste | 2016 |
| Fuzion Restaurant Ltd | Hospitality | 2025 |
| FZ Hairdresser Ltd | Other services | 2022 |
| G & F Fulgoni Limited | Wholesale & retail | 2025 |
| G. Gonzalez Carpentry and Construction Limited | Construction | 2006 |
| G.Deakin & Hughes,Limited | Professional & scientific | 1927 |
| Gabb and Co Executor and Trustee Company | Professional & scientific | 2010 |
| Ganol Ltd | Information & communication | 2012 |
| Gardenology Group UK Limited | Administrative & support | 2008 |
| Garelin UK Limited | Professional & scientific | 2020 |
| Gareth Rhys Property Limited | Real estate | 2024 |
| Garway VET Services Ltd | Professional & scientific | 2021 |
| GAS Mark One Limited | Construction | 2020 |
| Gateway Capital Limited | Administrative & support | 2003 |
| Gateway Church Abergavenny | Other services | 2011 |
| Gateway Cycles Limited | Wholesale & retail | 2020 |
| Gateway EOT Limited | Administrative & support | 2016 |
| Gateway OHS Ltd | Health & social care | 2010 |
| Gateway Therapy Ltd | Health & social care | 2026 |
| GCM Enterprises Limited | Wholesale & retail | 2006 |
| Gcrs Ltd | Professional & scientific | 2025 |
| Gelli Vineyard Limited | Manufacturing | 2025 |
| Gibbs Geotechnical Ltd | Professional & scientific | 2020 |
| Gibson DE Maisie Ltd | Professional & scientific | 2017 |
| Gibson Wellbeing & Education Ltd | Professional & scientific | 2026 |
| Giles P Croft Limited | Other services | 2019 |
| Gilwern Food Ltd | Hospitality | 2025 |
| Giuliette Limited | Health & social care | 2000 |
| GJW Storage Limited | Real estate | 2021 |
| Glad Things Ltd | Real estate | 2024 |
| Glamorgan Quality Meats Ltd | Wholesale & retail | 2012 |
| Glan Ochran Limited | Agriculture & fishing | 2006 |
| Glenelg Ltd | Information & communication | 2015 |
| GLW Tyres & Motor Repairs Limited | Wholesale & retail | 2016 |
| GMC Independent Social Work Limited | Health & social care | 2023 |
| Gold Blade Ltd | Other services | 2024 |
| Golden Valley Meat & Game Limited | Wholesale & retail | 2000 |
| Goldground Limited | Wholesale & retail | 1950 |
| Gone Rogue Productions Ltd | Information & communication | 2024 |
| Good Psychology Ltd | Professional & scientific | 2023 |
| Goose and Cuckoo Trading Ltd | Hospitality | 2024 |
| Gower Timber Limited | Manufacturing | 2003 |
| Grabner Refills Ltd | Other services | 2020 |
| Graff-City Ltd | Wholesale & retail | 2012 |
| Graham H Miller CYF | Information & communication | 2019 |
| Grand Tour Coffee Company Limited | Wholesale & retail | 2011 |
| Grant Davies Building Ltd | Construction | 2025 |
| Gravitas London Limited | Professional & scientific | 2014 |
| Green - Architecture and Landscape Ltd | Professional & scientific | 2018 |
| Green Box Solution Limited | Professional & scientific | 2022 |
| Green Park Renewables Ltd | Construction | 2015 |
| Green Waste Company (Abergavenny) Limited | Agriculture & fishing | 2012 |
| Greenbit Digital Limited | Information & communication | 2020 |
| Greenfingers Landscape Gardens Ltd | Administrative & support | 2019 |
| Greenspace Garden Rooms Ltd | Construction | 2022 |
| Greenspace Living Limited | Construction | 2020 |
| Griffiths Wyatt Ltd | Real estate | 2025 |
| Grosmont Ventures Limited | Construction | 2025 |