| Edge Design & Detailing Limited | Professional & scientific | 2011 |
| Edward Gorman Projects Limited | Information & communication | 2013 |
| Eileen Murphy Consultancy Limited | Education | 2002 |
| EL Coffee Shack Limited | Hospitality | 2025 |
| Electro-Test (Southern) Ltd. | Construction | 2012 |
| Elms Wellbeing Limited | Education | 2025 |
| Emdr Solutions Online Limited | Administrative & support | 2018 |
| Eppco (UK) Limited | Real estate | 1996 |
| Epynt Holidays Ltd | Hospitality | 2016 |
| Equine Physiotherapy Services Ltd | Professional & scientific | 2017 |
| Esteem Support Agency Ltd | Administrative & support | 2023 |
| Euroconnexxions Limited | Transport & logistics | 2004 |
| Evans Plant Services Limited | Manufacturing | 2015 |
| Evans Property Development Limited | Real estate | 1999 |
| Everest Hotels Limited | Hospitality | 1997 |
| Evoke Brand Creations Ltd | Wholesale & retail | 2023 |
| EVS Facilities Limited | Information & communication | 2010 |
| EVS Homes Limited | Real estate | 2025 |
| Ewan Brook Camping and Crafts Limited | Hospitality | 2023 |
| Expedition Medicine Society Community Interest Company | Information & communication | 2022 |
| Ezpctv Ltd | Information & communication | 2021 |
| Fabian Computers Limited | Information & communication | 1988 |
| Falm Ltd | Other services | 2020 |
| Famatel UK Limited | Wholesale & retail | 2012 |
| Fedw Equestrian Centre Ltd | Agriculture & fishing | 2021 |
| Felin Talgarth Mill Limited | Arts & recreation | 2010 |
| Ffynnonau Ltd | Hospitality | 2019 |
| FGE Holdings Limited | Financial services | 2017 |
| Final Rendezvous (FRV) Ltd | Hospitality | 2025 |
| Fine Iron (Wales) Limited | Manufacturing | 2004 |
| Fine Iron Designs Ltd | Extraterritorial | 2022 |
| Fine Iron Limited | Manufacturing | 2001 |
| Fire + Ice Recovery Limited | Health & social care | 2025 |
| First Optic Limited | Health & social care | 2012 |
| First Quantum Limited | Professional & scientific | 2002 |
| Flipuzzlez Ltd | Wholesale & retail | 2026 |
| Flowkit Residents Association (1989) Limited | Real estate | 1988 |
| Flyte Parsons Limited | Mining & quarrying | 2019 |
| Follywood Associates Limited | Professional & scientific | 2022 |
| Forest Park & Garden Training Ltd | Education | 2024 |
| Forestry Ground Prep Ltd | Agriculture & fishing | 2013 |
| Found at the Imaginarium CIC | Education | 2025 |
| Four Ashes Moorings Limited | Hospitality | 2008 |
| Fpjm Marketing Ltd | Information & communication | 2026 |
| Frank Medford Ltd | Health & social care | 2015 |
| Freedom Green Energy Ltd | Wholesale & retail | 2012 |
| Friends for Pets Brecon Limited | Other services | 2021 |
| FRV (Final Rendezvous) CIC | Health & social care | 2025 |
| Fxwales Ltd | Information & communication | 2023 |
| G J (Mats) Ltd | Wholesale & retail | 2012 |
| G J Inseal Limited | Construction | 2015 |
| G Prosser Builders Limited | Construction | 2013 |
| G. Adams Construction Limited | Construction | 1998 |
| Gaerllwydd Settled Estates Limited | Real estate | 1973 |
| Gareth Smart Transport Limited | Transport & logistics | 2013 |
| Gekkō Advisory Services Ltd | Professional & scientific | 2025 |
| Genquix Ltd | Information & communication | 2026 |
| Genuine Jayjays Ltd | Manufacturing | 2006 |
| George & Paige Motorcycles Ltd | Other services | 2018 |
| George Keppe Limited | Professional & scientific | 1987 |
| Geoworld Travel Ltd | Administrative & support | 2012 |
| Geronimo BOY Film Ltd | Professional & scientific | 2019 |
| GET Battered Limited | Hospitality | 2017 |
| GFG Industrial Services Limited | Professional & scientific | 2022 |
| Gilfach Retreat Ltd | Hospitality | 2026 |
| Giltrap Consultancy Limited | Professional & scientific | 2025 |
| Glanusk Services Ltd | Wholesale & retail | 2016 |
| Globalroad Limited | Financial services | 2009 |
| Glosslabs Ltd | Other services | 2025 |
| Glyndwr Books Limited | Wholesale & retail | 2023 |
| Glyndwr Property Investments Limited | Real estate | 2022 |
| GM2L Limited | Construction | 2011 |
| GMC Development (Brecon) Ltd | Other services | 2024 |
| GMT Sound Limited | Information & communication | 2003 |
| Goldup Property & Co Ltd | Real estate | 2025 |
| Goldup Property Ltd | Construction | 2025 |
| Golwg-Y-Fan Property Management Limited | Professional & scientific | 2013 |
| Golygfa Aberhonddu Brecon View Eco Village Ltd | Hospitality | 2017 |
| Good Day OUT Ltd | Arts & recreation | 2012 |
| Good Earth Garden Market Ltd | Wholesale & retail | 2021 |
| Goodfillers (Llandovery) Limited | Wholesale & retail | 2015 |
| Gorge Walking Wales Limited | Administrative & support | 2024 |
| GP Biotec Ltd | Energy | 2008 |
| Graham Bell Design (Sussex) Ltd. | Information & communication | 1998 |
| Grand Prix Models Limited | Wholesale & retail | 1989 |
| Grangemount Limited | Real estate | 1996 |
| GRC Hydro Limited | Energy | 2012 |
| Greener Power Supplies Limited | Extraterritorial | 2009 |
| Greenway Poultry Limited | Agriculture & fishing | 2003 |
| Gretta J Holdings Limited | Real estate | 2022 |
| Griffin Meadow Management Company Limited | Real estate | 2006 |
| Griots Arts Ltd | Information & communication | 2021 |
| Grosvenor International Partners Ltd | Administrative & support | 2010 |
| GTM Auto Services Limited | Wholesale & retail | 2025 |
| GTP Waste Ltd | Water & waste | 2014 |
| Gumisil(Uk) Ltd | Transport & logistics | 2019 |
| Gunning Caravan Parks Ltd | Hospitality | 2015 |
| Gurkha Resource Services Ltd | Administrative & support | 2019 |
| GW & L Consultancy Ltd | Professional & scientific | 2021 |
| Gwenyn a Draig Ltd | Hospitality | 2021 |