| Mupro France | Loos, France | Visit site |
| Must Energy Group | China | Visit site |
| Mustakbal Clean Tech | عمّان, Jordan | Visit site |
| Mwangaza Light | Mthatha, South Africa | Visit site |
| MÉTIGA | Paris, France | Visit site |
| NASH ENERGY (I) PVT LTD | India | Visit site |
| NC13 Industries Ltd | Benfleet, United Kingdom | Visit site |
| NEEW Ventures | Berlin, Germany | Visit site |
| NEM Energy Group | Düsseldorf, Germany | Visit site |
| NEMA Solar Construction AB | Stockholm, Sweden | Visit site |
| NEOM | Al Sa'adi, United Arab Emirates | Visit site |
| NESSTEC Energy & Surface Technologies A.S. | Serdivan, Türkiye | Visit site |
| NEU Battery Materials | Singapore | Visit site |
| NEXT COOLING | Australia | Visit site |
| NEXTWIND | Sevilla, Spain | Visit site |
| NGE - BTP | Saint-Étienne-du-Grès, France | Visit site |
| NGH New Generation House | Osimo, Italy | Visit site |
| NHOA Energy | Milan, Italy | Visit site |
| NIP do Brasil | Vitória, Brazil | Visit site |
| NIRAS International Consulting | København, Denmark | Visit site |
| NOF | Durham, United Kingdom | Visit site |
| NORECS AS | Oslo, Norway | Visit site |
| NOVOLECS | Saint-Augustin-de-Desmaures, Canada | Visit site |
| NPS Solar | Oldham, United Kingdom | Visit site |
| NRG Project & Storage | Ksawerów, Poland | Visit site |
| NSW Department of Climate Change, Energy, the Environment and Water | Sydney, Australia | Visit site |
| NTC POWER | Tunis, Tunisia | Visit site |
| NTC-Systems | Landsberg am Lech, Germany | Visit site |
| NTR plc | Dundrum, Ireland | Visit site |
| NUWARD | Düsseldorf, Germany | Visit site |
| NW | Paris, France | Visit site |
| NXP Semiconductors | Eindhoven, Netherlands | Visit site |
| NXT Grid | Amsterdam, Netherlands | Visit site |
| NXTGEN Energy Limited | Rayleigh, United Kingdom | Visit site |
| NZ Electrical Solutions | Christchurch, New Zealand | Visit site |
| Nacap Pty Ltd | Melbourne, Australia | Visit site |
| Nachhaltigkeit.Ruhr | Bochum, Germany | Visit site |
| Namibia Green Hydrogen Programme | Khomasdal, Namibia | Visit site |
| Namkoo Power | Fuoshan Shi, China | Visit site |
| Namo eWaste Management Ltd. | Faridabad, India | Visit site |
| Nandan Petrochem Limited | Mumbai, India | Visit site |
| NanoChronia | Barcelona, Spain | Visit site |
| Naqsh (نقش) | Al-Riyadh, Saudi Arabia | Visit site |
| National Solar Energy Group | Adelaide, Australia | Visit site |
| National Solar Systems Company | Ad Dammam, Saudi Arabia | Visit site |
| National Treasury Management Agency | Dublin, Ireland | Visit site |
| Natixis Corporate & Investment Banking | Paris, France | Visit site |
| Nature Energy | Odense, Denmark | Visit site |
| Naturel Holding | London, United Kingdom | Visit site |
| Naturelek | Energía e Ingeniería | Derio, Spain | Visit site |
| Naturgy | Madrid, Spain | Visit site |
| Nav Solar Power | Noida, India | Visit site |
| Navocean | Rio de Janeiro, Brazil | Visit site |
| Nawal Analytical Labs India Private Limited | Dindigul, India | Visit site |
| Nebbo | Barcelona, Spain | Visit site |
| NedZero - Wind Energy Association | Utrecht, Netherlands | Visit site |
| Nederlandse Vereniging Duurzame Energie (NVDE) | Utrecht, Netherlands | Visit site |
| Nedstack Fuel Cell Technology | Arnhem, Netherlands | Visit site |
| Nemo Nanomaterials | Petah Tikva, Israel | Visit site |
| Neo Energy Group | Warszawa, Poland | Visit site |
| Neo Energy Storage Ltd (UK) | London, United Kingdom | Visit site |
| NeoGreen Power | Bengaluru, India | Visit site |
| Neogy | Mérignac, France | Visit site |
| Neon Cables | Rajkot, India | Visit site |
| Nergietech RDC | Kinshasa, Democratic Republic of the Congo | Visit site |
| Nerosolar Energía Solar SL | Náquera, Spain | Visit site |
| Nessa Illumination Technologies Pvt Ltd | Ahmedabad, India | Visit site |
| Net Zero Asset Finance Limited | London, United Kingdom | Visit site |
| NetZero | Paris, France | Visit site |
| Netra Power | Genève, France | Visit site |
| New Energy Solutions | Belgrade, Serbia | Visit site |
| NexGen Wafer Systems | Singapore | Visit site |
| Nexperia | Netherlands | Visit site |
| Next Carbon Trading | Aguascalientes, Mexico | Visit site |
| Next Fabrication | Risskov, Denmark | Visit site |
| Next Generation Renewable Energy -Powered by OVO | Oxford, United Kingdom | Visit site |
| Next Green Group | Melbourne, Australia | Visit site |
| Next Solar | بيروت, Lebanon | Visit site |
| NextStar Energy | Windsor, Canada | Visit site |
| Nexus Analytica | Amsterdam, Netherlands | Visit site |
| Nexus for Development | Phnom Penh, Cambodia | Visit site |
| Nidec Drives | Newtown, United Kingdom | Visit site |
| Niko Energy | Ciudad de México, Mexico | Visit site |
| Nimble Vision | Koratagere, India | Visit site |
| Ningbo Green Light Energy Pvt Ltd. | Pakistan | Visit site |
| Ningbo Kibor Wire & Cable Co., Ltd. | Ningbo, China | Visit site |
| Ningbo Ulica Solar Co., Ltd. | Ningbo Shi, China | Visit site |
| NitroFix | Israel | Visit site |
| No Grey Area | Egypt | Visit site |
| Nobel Fire Systems Ltd | Bury, United Kingdom | Visit site |
| Nomura | Japan | Visit site |
| Noon for Renewable Energy | عمّان, Jordan | Visit site |
| Norconsult Sverige | Göteborg, Sweden | Visit site |
| Nordic Electrofuel | Lysaker, Norway | Visit site |
| Nordmount | Värnamo, Sweden | Visit site |
| Nordsol | Bunnik, Netherlands | Visit site |
| Norrsken Barcelona | Belgium | Visit site |
| Norsk Biogass AS | Vollen, Norway | Visit site |
| Norsk Hydrogenforum | Oslo, Norway | Visit site |
| North Shore Environmental Consultants Inc. | Sherwood Park, Canada | Visit site |
| Northges | Redondela, Spain | Visit site |
| Norvento Enerxía | Lugo, Spain | Visit site |
| Norwegian Hydrogen | Ålesund, Norway | Visit site |
| Nouran Lighting | Dubai, United Arab Emirates | Visit site |
| Nova Miron S.A. | Buenos Aires, Argentina | Visit site |
| Nova Steel Metal | Toprakkale, Türkiye | Visit site |
| NovaEnergia SAL | المتن, Lebanon | Visit site |
| Novaled GmbH | Dresden, Germany | Visit site |
| Novarc Technologies Inc. | Burnaby, Canada | Visit site |
| Novasys Greenergy Limited | Kalameshwar, India | Visit site |
| Novatron Fusion Group AB | Stockholm, Sweden | Visit site |
| Novus Energy | Konak, Türkiye | Visit site |
| Nowa Tepro sp. z o.o. | Gdańsk, Poland | Visit site |
| NuVolta Technologies | Shanghai, China | Visit site |
| Nuada | Newtownabbey, United Kingdom | Visit site |
| Nuel Advanced Technologies Ltd | Nesher, Israel | Visit site |
| Nuru | Goma, Democratic Republic of the Congo | Visit site |
| Nusec GmbH | Beverungen, Germany | Visit site |
| Nutz GmbH | Ampfing, Germany | Visit site |
| Nuvo Energy Africa | Johannesburg, South Africa | Visit site |
| Nxtech AS | Kråkerøy, Norway | Visit site |
| Núna Energy | Hilversum, Netherlands | Visit site |
| OCTANE Management Consultants | Athina, Greece | Visit site |
| OHLA Group | Madrid, Spain | Visit site |
| OLG | Cleethorpes, United Kingdom | Visit site |
| ONE TRIBE | Manchester, United Kingdom | Visit site |
| ONiO | Oslo, Norway | Visit site |
| ORTECO | Piledriver producers | Anzola dell'Emilia, Italy | Visit site |
| OSL Consulting Engineers | Hull, United Kingdom | Visit site |
| OWEMES | Roma, Italy | Visit site |
| Oasis Infrastructure Pvt. Ltd. | Mumbai, India | Visit site |
| Oasthouse Ventures Limited | Brighton, United Kingdom | Visit site |
| Obelisk Energy | Cape Town, Denmark | Visit site |
| Obsidian Engineering | Calgary, Canada | Visit site |
| Ocean Ecology Ltd | Gloucester, United Kingdom | Visit site |
| Ocean Energy Europe | Brussels, Belgium | Visit site |
| Ocean Impact Organisation | Ourimbah, Australia | Visit site |
| Ocean Sun | Sharjah, United Arab Emirates | Visit site |
| Octago Advisory Solutions LLP | Mumbai, India | Visit site |
| Octopus Energy Generation | London, United Kingdom | Visit site |
| Octopus Investments | London, United Kingdom | Visit site |
| Odeskabel | Одеса, Ukraine | Visit site |
| Odfjell Oceanwind | Aberdeen, Norway | Visit site |
| Offshore Energies UK | London, United Kingdom | Visit site |
| Offshore Wind Foundations Alliance (OWFA) | Brussels, Belgium | Visit site |
| Oliveira Trust | Rio de Janeiro, Brazil | Visit site |
| Om Solar Solutions | Chhibramau, India | Visit site |
| Omega Sonnen | Perai, Malaysia | Visit site |
| Omnes | Brussels, Belgium | Visit site |
| Omnicon | Cali, Colombia | Visit site |