| Wageningen University & Research (WUR) | | | |
| Washington State University (WSU) | Academic Institution | | Climate Services and Safety Nets |
| Water and Energy Commission Secretariat (WECS) | Government office/department | South Asia | Climate-Smart Technologies and Practices |
| Water and Land Management Training and Research Institute (WALAMTARI) | Government office/department | South Asia | Climate-Smart Technologies and Practices |
| Water Research Institute (WRI) | Advanced Research Institution | West Africa | Climate-Smart Technologies and Practices |
| Water Watch | Private Research Institution | | Climate Services and Safety Nets |
| Water, Energy and Environment Center (WEEC) | Academic Institution | | Climate Services and Safety Nets |
| West African Science Service Center on Climate Change and Adapted Land Use (WASCAL) | Advanced Research Institution | West Africa | Climate-Smart Technologies and Practices, Low Emissions Development |
| West and Central African Council for Agricultural Research and Development (CORAF/WECARD) | Regional Organization | West Africa | |
| Westhill Knowledge Ltd | Other | | |
| Wildlife Works | Non-governmental organization/Development organization | | Low Emissions Development |
| Winrock International (WI) | Advanced Research Institution | | Low Emissions Development |
| Women in Global Science and Technology | | | |
| Women Organizing for Change in Agriculture & Natural Resource Management (WOCAN) | Regional Organization | Southeast Asia | |
| World Agroforestry Centre (ICRAF) | CGIAR Center | East Africa | Climate-Smart Technologies and Practices, Low Emissions Development, Climate Services and Safety Nets, Gender and Social Inclusion |
| World Business Council For Sustainable Development | | | |
| World Food Programme (WFP) | Other | | Climate Services and Safety Nets |
| World Meteorological Organization (WMO) | Other | | Climate Services and Safety Nets |
| World Neighbors (WN) | Non-governmental organization/Development organization | | Climate-Smart Technologies and Practices, Climate Services and Safety Nets |
| World Resources Institute (WRI) | Non-governmental organization/Development organization | | |
| World Vision | | | |
| World Vision International (WVI) | Non-governmental organization/Development organization | East Africa | Climate-Smart Technologies and Practices, Low Emissions Development |
| World Wildlife Fundation (WWF) | Non-governmental organization/Development organization | | Low Emissions Development |
| WorldFish | CGIAR Center | Southeast Asia | Climate Services and Safety Nets |
| Xishuangbanna Tropical Botanical Gardens, Chinese Academy of Sciences (XTBG) | National agricultural research and extension services | | Low Emissions Development |
