- W. K. Kellogg Biological Station
- W. M. Keck Observatory
- W. W. Hansen Experimental Physics Laboratory
- W.M. Keck Biotechnology Resource Laboratory
- W.M. Keck Laboratory for Space and Planetary Simulation [Fayetteville]
- W.M. Keck Observatory
- WESS Water and Earth System Science Competence Cluster
- WG Molecular Analysis of Synaptopathies
- WHO Collaborating Center on Prevention and Treatment of Human Echinococcosis
- WHO Collaborating Centre for Metabolic Bone Diseases
- WHO Collaborative Center for the meningococcus
- WHO Phnom Penh
- WPI Immunology Frontier Research Center
- WUHAN BOTANICAL GARDEN
- Wake Forest School of Medicine [Winston-Salem]
- Wales Heart Research Institute [Cardiff]
- Walker Institute, NCAS Climate
- Wallenberg Research Centre at Stellenbosch University
- Walter Schottky Institut
- Warszawski Uniwersytet Medyczny
- Warwick Clinical Trials Unit [Coventry, UK]
- Warwick Manufacturing Group [Coventry]
- Warwick Mathematics Institute
- WatchSystAnce
- Water & Earth System Science Competence Cluster
- Water and Environment Research Group
- Water and Food Group
- Waves and Solitons LLC
- Wealth from Oceans Flagship
- Wealth from oceans National Research Flagship
- Wegener Center for Climate and Global Change
- Weierstrass Institut für Angewandte Analysis and Stochastik
- Weierstrass-Institute
- Weierstraß-Institut für Angewandte Analysis und Stochastik = Weierstrass Institute for Applied Analysis and Stochastics [Berlin]
- Weill Cornell Medical College - Qatar, Qatar Foundation - Education City, Doha
- Weill Cornell Medical College in Qatar
- Welch Center for Prevention
- Wellcome Trust Centre for Cell Biology
- Wellcome Trust Centre for Cell-Matrix Research, Faculty of Life Sciences,
- Wellcome Trust Centre for Mitochondrial Research
- Wellcome Trust Genome Campus
- Wellcome Trust|Cancer Research UK Gurdon Institute
- Wessex Clinical Genetics Service
- West Midlands Regional Genetics Service
- Western Australian Institute for Medical Research
- Western Psychiatric Institute and Clinic [Pittsburgh, USA]
- Western Region Plant Introduction Station
- Whitehead Institute
- Wiggins Observatory
- Wildlife Conservation,
- William Buckland Radiotherapy Centre
- William I. Fine Theoretical Physics Institute
- Wilson Centre for Research in Education
- Wisconsin Division of Public Health
- Wisconsin Geological and Natural History Survey
- Wisconsin Regional Primate Research Center
- Wise Observatory and Department of geophysics and planetary sciences
- Wiskunde & Informatica
- Wohl Virion Centre, Division of Infection and Immunity
- Wolfgang Pauli Institute
- Wolfson Atmospheric Chemistry Laboratories
- Wolfson Institute for Biomedical Research and Department of Biology
- Wollongong University
- Women's Cancer Program
- Women's College Research Institute
- Woods Hole Oceanographic Institution, Department Geology and Geophysics
- Woolcock Institute of Medical Research [Sydney]
- World Agroforestry Center [CGIAR, Indonésie]
- World Bank
- World Cities Project, International Longevity Center
- World Health Organisation
- World Health Organisation (WHO), country office for Somalia
- World Health Organization
- World Health Organization (WHO), country office for Thailand
- World Health Organization [Phnom Penh]
- WorldWide Antimalarial Resistance Network
- WorldWide Antimalarial Resistance Network In Vitro Module
- Wu Wen-Tsun Key Laboratory of Mathematics, Chinese Academy of Sciences
- Wuhan Inst Phys & Math
- Wuhan Institute of Physics and Mathematics
- Wuhan National Laboratory for Optoelectronics
- Wuhan National Laboratory for Optoelectronics [HUST]
- Wyant College of Optical Sciences [University of Arizona]
- Wydzial Matematyki UW