- Macquarie University
- Maharishi University of Management
- Malaghan Institute of Medical Research
- Manchester Metropolitan University
- March of Dimes Foundation
- Marine Biological Laboratory
- Marine Megafauna Foundation
- Marvell
- Mary Ann Liebert, Inc
- Masonic Medical Research Laboratory
- Mass General Brigham
- Massachusetts Eye and Ear Infirmary
- Massachusetts General Hospital
- Massachusetts Institute of Technology
- Massey University
- Materials Research Laboratory, Massachusetts Institute of Technology
- Max Delbrück Center for Molecular Medicine
- Max Planck Florida Institute for Neuroscience
- Max Planck Institute for Demographic Research
- Max Planck Institute for Intelligent Systems Tübingen
- Max Planck Institute for the Science of Light
- Max Planck Institute for the Structure and Dynamics of Matter
- Max Planck Institute of Immunobiology and Epigenetics
- Max Planck Institute of Microstructure Physics
- Max Planck Society
- Mayfield Clinic
- Mayo Clinic
- McGill University
- McGill University Health Centre
- McLean Hospital
- McMaster University
- Medical College of Georgia
- Medical College of Georgia at Augusta University
- Medical College of Wisconsin
- Medical Research Council
- Medical University of South Carolina
- Medical University of Vienna
- MedStar Georgetown University Hospital
- Melanoma Institute Australia
- Mellon College of Science
- Memorial Sloan Kettering Cancer Center
- Memorial Sloan-Kettering Cancer Center
- Mercyhurst University
- Miami University
- Michigan State University
- Michigan State University - Department of Energy Plant Research Laboratory
- Michigan State University College of Veterinary Medicine
- Michigan Technological University
- Microsoft
- Middle Tennessee State University
- Middlesex University
- Midwestern University
- Milken Institute School of Public Health
- Mississippi State University
- Missouri University of Science and Technology
- MIT Department of Materials Science and Engineering
- MIT Sloan School of Management
- Monash Institute of Medical Research
- Monash University
- Monash University Malaysia
- Monell Chemical Senses Center
- Montana State University
- Monterey Bay Aquarium
- Monterey Bay Aquarium Research Institute
- Monterey Bay Aquarium Research Institute
- Montreal Heart Institute
- Morgridge Institute for Research
- Moscow Institute of Physics and Technology
- Mote Marine Laboratory
- Mount Desert Island Biological Laboratory
- MTT Agrifood Research Finland
- Murdoch Children's Research Institute
- Murdoch University
