| Frontier Economics | Dublin, Ireland | Visit site |
| Frontier Economics | Madrid, Spain | Visit site |
| Frontier Economics | Paris, France | Visit site |
| Frontier Economics | Sydney, Australia | Visit site |
| Frontier Economics | Melbourne, Australia | Visit site |
| Fröling Heizkessel und Behälterbau GmbH | Grieskirchen, Austria | · |
| Fuchs & Eule | Berlin, Germany | Visit site |
| Fuel Cell Systems Ltd. | Hungerford, United Kingdom | Visit site |
| FuelsEurope | Auderghem, Belgium | Visit site |
| Fuergy | Bratislava, Slovakia | Visit site |
| Fuji Electric (Malaysia) Sdn. Bhd. | Kulim, Malaysia | Visit site |
| Full Circle Wind Services | Amersfoort, Netherlands | · |
| Fullink | Shenzhen Shi, China | Visit site |
| Fundusze Europejskie | Warszawa, Poland | Visit site |
| Fundy Ocean Research Centre for Energy (FORCE) | West Bay, Canada | Visit site |
| Fuse | Napierville, Canada | Visit site |
| Fusebox | Tallinn, Estonia | Visit site |
| Fusion Fuel | Sintra, Portugal | Visit site |
| Futech BVBA | Tessenderlo, Belgium | Visit site |
| Futech BVBA | Houthulst, Belgium | Visit site |
| Futech BVBA | Mouscron, Belgium | Visit site |
| Futr Energy | Noida, India | · |
| FuturEnergSystems | London, United Kingdom | Visit site |
| FuturaSun | Cittadella, Italy | Visit site |
| Future Energy Summit | Panamá, Panama | Visit site |
| Future Greens | Sheffield, United Kingdom | Visit site |
| Future Planet Capital | London, United Kingdom | Visit site |
| FutureNed | Mijnsheerenland, Netherlands | · |
| Futurea | Milano, Italy | · |
| Fénix Energy | Buenos Aires, Argentina | Visit site |
| Fóton Energia Solar | Salvador, Brazil | Visit site |
| G&S Electrical Solution | Peru | Visit site |
| G&S Electrical Solution | Lima, Peru | Visit site |
| G-LYTE | Amiens, France | Visit site |
| G-Store | Melbourne, Australia | Visit site |
| G-Tec Europe | Vicenza, Italy | Visit site |
| G-Tech Energy | United States | Visit site |
| G-ener Renovables | Palma, Spain | Visit site |
| G.E.O.S. Ingenieurgesellschaft mbH | Halsbrücke, Germany | Visit site |
| G3 GEOTERMIA | Vitoria-Gasteiz, Spain | Visit site |
| G5 INSTRUMENTOS | Curitiba, Brazil | Visit site |
| G7 Renewable Energies (Pty) Ltd | Cape Town, South Africa | Visit site |
| GA Drilling | Bratislava, Slovakia | · |
| GAMA Power Systems | Yenimahalle, Türkiye | Visit site |
| GAMUDA | Petaling Jaya, Malaysia | Visit site |
| GAMUDA | Malaysia | Visit site |
| GANELEC | Johannesburg, South Africa | Visit site |
| GB Solar | Vadodara, India | Visit site |
| GBE Battery | Orgiano, Italy | Visit site |
| GBatteries | Nepean, Canada | · |
| GC Solar | Centurion, South Africa | Visit site |
| GCE | Steinhausen, Switzerland | Visit site |
| GCL Energy Technology | Suzhou Shi, China | Visit site |
| GCL Technology Holdings Limited | Hong Kong, Hong Kong | Visit site |
| GCLSI | 新城鄉, Taiwan | Visit site |
| GDES | Grupo Dominguis Energy Services | Paterna, Spain | Visit site |
| GDM Assets | Nea Chalkidona, Greece | Visit site |
| GDSolar | São Paulo, Brazil | Visit site |
| GDTech Engineering | Bordes, France | Visit site |
| GE Renewable Energy | Boulogne-Billancourt, France | · |
| GE4ALL B.V. | Hoofddorp, Netherlands | Visit site |
| GEA Solaris | Morelia, Mexico | Visit site |
| GEE Energy | Melbourne, Australia | Visit site |
| GEES ENERJİ | Karatay, Türkiye | Visit site |
| GEHECO | Delft, Netherlands | Visit site |
| GEK TERNA Group of Companies | Athina, Greece | Visit site |
| GENBA Group | Karesi, Türkiye | Visit site |
| GENERG | Lisboa, Portugal | Visit site |
| GENEX ENERGY | Perth, Australia | Visit site |
| GENEX ENERGY | Baldivis, Australia | Visit site |
| GEOLUX , Lda | Braga, Portugal | Visit site |
| GEOS Energía | Monterrey, Mexico | Visit site |
| GES - Global Energy Services | Zamudio, Spain | · |
| GES-Madagascar | Antananarivo, Madagascar | · |
| GEV Wind Power | Hessle, United Kingdom | · |
| GEVI | Pontedera, Italy | Visit site |
| GGGI Cambodia | Phnom Penh, Cambodia | Visit site |
| GH2 Global | São Paulo, Brazil | Visit site |
| GH2 India | New Delhi, India | Visit site |
| GH2 Solar | Noida, India | Visit site |
| GHENOVA | Castilleja de la Cuesta, Spain | Visit site |
| GIC | Singapore, Singapore | Visit site |
| GIGA Storage | Amstelveen, Netherlands | · |
| GIGA.GREEN | Berlin, Germany | Visit site |
| GIGATONS | Abu Dhabi, United Arab Emirates | Visit site |
| GIS Renewable Energy Colombia S.A.S | Barranquilla, Colombia | Visit site |
| GK Polimex Mostostal | Warszawa, Poland | Visit site |
| GK Solar | Gdańsk, Poland | Visit site |
| GKN Hydrogen | Falzes, Italy | Visit site |
| GLE MMC - Green Life Engineering | Baku, Azerbaijan | Visit site |
| GLE MMC - Green Life Engineering | Maku, Iran | Visit site |
| GLOBE Fuel Cell Systems | Stuttgart, Germany | · |
| GLSG Solar Australia Pty Ltd | Brisbane, Australia | Visit site |
| GMD Solutions | Madrid, Spain | Visit site |
| GME Group | Buenos Aires, Argentina | Visit site |
| GME clean power AG | Unterhaching, Germany | · |
| GMR Energy Engineering | Çankaya, Türkiye | Visit site |
| GMR Group | New Delhi, India | Visit site |
| GNX Engineering | Budapest, Hungary | Visit site |
| GO Enerji - GOEN® | Çankaya, Türkiye | Visit site |
| GODI | Hyderabad, India | Visit site |
| GODSEND Solar | Manila, Philippines | Visit site |
| GODSEND Solar | Angeles, Philippines | Visit site |
| GOLDBECK SOLAR Group | Hirschberg an der Bergstraße, Germany | · |
| GOLDBECK SOLAR North America | Toronto, Canada | Visit site |
| GONEO New Energy | Ningbo Shi, China | Visit site |
| GOODHEAT | Fuoshan Shi, China | Visit site |
| GOP German Offgrid Power | Unterensingen, Germany | Visit site |
| GOPA Infra | Bad Homburg vor der Höhe, Germany | Visit site |
| GOPA Infra | Ouagadougou, Burkina Faso | Visit site |
| GOPA Infra | Tulle, France | Visit site |
| GOPA Infra | Cairo, Egypt | Visit site |
| GOPA Infra | გურჯაანი, Georgia | Visit site |
| GOPA Infra | Guatemala, Guatemala | Visit site |
| GOPA Infra | ماركا, Jordan | Visit site |
| GOPA Infra | Maliq, Albania | Visit site |
| GOPA Infra | Belgrade, Serbia | Visit site |
| GOPA Infra | Kampala, Uganda | Visit site |
| GOPA Infra | Kyiv, Ukraine | Visit site |
| GOPA Infra | Tashkent, Uzbekistan | Visit site |
| GOPA Infra | Lusaka, Zambia | Visit site |
| GOPA PACE | Woluwe-Saint-Pierre, Belgium | Visit site |
| GOPA PACE | Bad Homburg vor der Höhe, Germany | Visit site |
| GOPA PACE | Abu Dhabi, United Arab Emirates | Visit site |
| GOPA PACE | Abuja Municipal, Nigeria | Visit site |
| GOPA PACE | Çankaya, Türkiye | Visit site |
| GOPA PACE | Pretoria, South Africa | Visit site |
| GOWIND SpA | Los Ángeles, Chile | · |
| GP Eco Solutions India Ltd. | Noida, India | Visit site |
| GP Solar | China | Visit site |
| GPES Green Projects Pvt. Ltd. | Noida, India | Visit site |
| GPGATE | Stockholm, Sweden | Visit site |
| GR ENERGIES | Merdrignac, France | Visit site |
| GREEN GENIUS | Vilnius, Lithuania | Visit site |
| GREEN SYSTEMS Srl | Castel Rozzone, Italy | · |
| GREEN WORK TECHNOLOGY | Soria, Spain | Visit site |
| GREEN | Greek Environmental & Energy Network SA | Pireas, Greece | Visit site |
| GREENJOULES PVT LTD. | Pimpri-Chinchwad, India | Visit site |
| GREENKw | a TSG Group Company | Bilbao, Spain | Visit site |
| GREENoneTEC Solarindustrie GmbH | St. Veit an der Glan, Austria | Visit site |
| GREW Solar | Ahmedabad, India | Visit site |
| GRIDiNFY | Mulshi, India | Visit site |
| GRIPS Energy | Berlin, Germany | Visit site |
| GRONN | Centurion, South Africa | Visit site |
| GROUPE CORIANCE | France | Visit site |
| GROUPE GAGNERAUD | France | Visit site |
| GROUPE GAGNERAUD | Passa, France | Visit site |
| GROUPE LANSARD | Argonay, France | Visit site |
| GROW offshore wind | Utrecht, Netherlands | Visit site |
| GRPOWER | Paris, France | Visit site |