| W2E CLEANTECH ENERGY | København, Capital Region of Denmark | Visit site |
| W2E Renewable Solutions | Castle Pines, Colorado | Visit site |
| W2E Wind to Energy GmbH | Rostock, Mecklenburg-Western Pomerania | Visit site |
| W2E-UK LTD | Pontefract, England | Visit site |
| W3 Energy | Umeå, Västerbotten | Visit site |
| WAGO | Minden, North Rhine-Westphalia | Visit site |
| WAMEST Energy | Al-Riyadh, Riyadh | Visit site |
| WASKEY | Baton Rouge, Louisiana | Visit site |
| WE Sol | New Delhi, Delhi | Visit site |
| WE Transition énergétique & circulaire | Liège, Liege | Visit site |
| WEB Renewable Energy USA LLC | Boston, Massachusetts | Visit site |
| WEB Windenergie AG | Pfaffenschlag bei Waidhofen a.d.Thaya, Lower Austria | Visit site |
| WEC - World Energy Council RD | Santo Domingo de Guzmán, Distrito Nacional | Visit site |
| WECON Technology Co., Ltd. | Fuzhou Shi, Fujian | Visit site |
| WEG Transformers USA | Washington, Missouri | Visit site |
| WEUP Power | Hefei Shi, Anhui | Visit site |
| WFCO Technologies | Elkhart, Indiana | Visit site |
| WHC Solar | Guangzhou Shi, Guangdong | Visit site |
| WIND-certification GmbH | Admannshagen-Bargeshagen, Mecklenburg-Western Pomerania | Visit site |
| WIND-projekt Ingenieur- und Projektentwicklungsgesellschaft mbH | Rostock, Mecklenburg-Western Pomerania | Visit site |
| WINDnovation GmbH | Berlin, Berlin | Visit site |
| WINKELMANN Elektromotoren GmbH & Co. KG | Uelzen | Visit site |
| WOPA Saving Energy | Riemst, Limburg | Visit site |
| WORD Rock Drills | Elon, North Carolina | Visit site |
| WP Group BV | Bremen, Bremen | Visit site |
| WR Transformateurs | Tomball, Texas | Visit site |
| WSC - Wilke & Schiele Consulting GmbH | Hamburg, Hamburg | Visit site |
| WSP USA | New York, New York | Visit site |
| WSP in Australia | Sydney, New South Wales | Visit site |
| WSP in Brazil | São Paulo, São Paulo | Visit site |
| WSP in Canada | Montréal, Quebec | Visit site |
| WSP in Manila | Pasig, Pasig | Visit site |
| WSP in the Middle East | Dubai, Dubai | Visit site |
| WSP in the UK & Ireland | London, England | · |
| WTEC Energy | Hasbrouck Heights, New Jersey | Visit site |
| Waaree Group | Mumbai, Maharashtra | Visit site |
| Wagner Renewables | Chichester, England | Visit site |
| Wakinda Project | Gleizé, Rhône | Visit site |
| Wanhos Solar | Xiamen Shi, Fujian | Visit site |
| Warmtenet Heechterp | Leeuwarden, Friesland | Visit site |
| Warmworks | Edinburgh, Scotland | Visit site |
| Wasserstoff Hub RKN/Rheinland e.V. | Neuss, North Rhine-Westphalia | Visit site |
| Wasserstoffallianz Westfalen GmbH | Neuss, North Rhine-Westphalia | Visit site |
| Waterotor Energy Technologies, Inc. | Ottawa, Ontario | Visit site |
| Watt Echo Energy | كسروان, Mount Lebanon | Visit site |
| Watt Matters | Ixelles, Brussels-Capital | Visit site |
| WattEV, Inc. | Long Beach, California | Visit site |
| Wattch | Atlanta, Georgia | Visit site |
| Wattmonk Technologies | Lewes, Delaware | Visit site |
| Watts on Water LLC | San Diego, CA | Visit site |
| Wavelength Lighting | · | Visit site |
| Weber-Ingenieure GmbH | Pforzheim, Baden-Württemberg | Visit site |
| Webro Cable & Connectors | Nottingham, England | Visit site |
| Weidmuller USA | Richmond, Virginia | Visit site |
| Weiguang Cable | Shanghai, Shanghai | Visit site |
| Wellflex Energy Solutions | White Settlement, Texas | Visit site |
| Wescom Inc | Duluth, Minnesota | Visit site |
| West State Electrics | Perth, Western Australia | Visit site |
| Western Earthworks | Florence, Massachusetts | Visit site |
| Western EcoSystems Technology, Inc. (WEST) | Cheyenne, Wyoming | Visit site |
| Western Electric Contractors Limited | Saffron Walden, England | Visit site |
| Western Land Services, Inc. | Ludington, Michigan | Visit site |
| Western United Dairies | Turlock, California | Visit site |
| Westinghouse Electric Company | Cranberry Township, Pennsylvania | Visit site |
| Westinghouse Electric Corporation | Apollo, Pennsylvania | Visit site |
| Westrafo | Vicenza, Vicenza | Visit site |
| Westsun Energy | Perth, Western Australia | Visit site |
| Westwood Professional Services | Plano, Texas | Visit site |
| Wheelhouse Land & Field Services, LLC | Weatherford, Texas | Visit site |
| Whetstone Power | Charlotte, North Carolina | Visit site |
| Whirlwind Steel Buildings | Houston, Texas | Visit site |
| White Horse Renewables | Abingdon, England | Visit site |
| Wilhelmsen Ahrenkiel Ship Management | Hamburg, Hamburg | Visit site |
| Wiltson Energy Technology Co., Ltd. | Guangzhou Shi, Guangdong | Visit site |
| WinSun Green Private Limited | Pimpri-Chinchwad, Maharashtra | Visit site |
| Wind Controller Oy | Oulu, North Ostrobothnia | Visit site |
| Wind Energy Ireland | Naas, Kildare | Visit site |
| Wind Industry Hub (WIH) | Szczecin, West Pomeranian Voivodeship | Visit site |
| Wind Multiplikator GmbH - Powered by Semco Maritime | Emden, Lower Saxony | Visit site |
| Wind-consult GmbH | Admannshagen-Bargeshagen, Mecklenburg-Western Pomerania | Visit site |
| WindServants GmbH | Flensburg, Schleswig-Holstein | Visit site |
| WindandSea-Research | Brisbane, Queensland | Visit site |
| Windcare India | Kolli Hills, Tamil Nadu | Visit site |
| Windscape AI | Berkeley, California | Visit site |
| Windunie | Utrecht, Utrecht | Visit site |
| Windy Nation | Ventura, California | Visit site |
| Wintop New Energy | Xiamen Shi, Fujian | Visit site |
| WisTek | Los Angeles, California | Visit site |
| Wiwasolvet Total Primary Energy Solutions | Halifax, Nova Scotia | Visit site |
| Wolf River Electric | Isanti, Minnesota | Visit site |
| Wolf Track Energy | Two Harbors, Minnesota | Visit site |
| Wolfspeed | Durham, North Carolina | Visit site |
| Women of Renewable Industries and Sustainable Energy (WRISE) | Ohio | Visit site |
| Won Kwang S&T Co., Ltd. | Incheon, Incheon | Visit site |
| Wood Mackenzie | Edinburgh, Scotland | Visit site |
| Woodville Pellets | Woodville, Texas | Visit site |
| World Biogas Association | London, England | Visit site |
| World4Solar | Las Vegas, Nevada | Visit site |
| Worldwide Mission Critical | Chantilly, Virginia | Visit site |
| Worley | Sydney, New South Wales | Visit site |
| Wurth Industry | Greenwood, Indiana | Visit site |
| Wuxi Autowell Technology Co., Ltd. | Wuxi, Jiangsu | Visit site |
| Wuxi JOCA Cable Technology Group Co., Ltd. | Shanghai | Visit site |
| Wuxi Sun King Energy Technology Co., Ltd. | Wuxi Shi, Jiangsu | Visit site |
| Wyse Meter Solutions Inc. | North York, Ontario | Visit site |
| Wysher ESS | Shanghai, Shanghai | Visit site |
| Wyssling Consulting, LLC | Alpine, Utah | Visit site |
| watts Ingenieurgemeinschaft PartGmbB | Berlin, Berlin | Visit site |
| wempyre | Pontevedra, Buenos Aires Province | Visit site |
| wind-turbine.com | Gelnhausen, Hesse | Visit site |
| windtest grevenbroich | Grevenbroich, North Rhine-Westphalia | Visit site |
| windtest north-america | Estherville, Iowa | Visit site |
| wpd Scandinavia AB | Stockholm, Stockholm | Visit site |