Juan Luis Arsuaga International Member (elected 2002)
Universidad Complutense de Madrid
Primary: 51, Anthropology
Secondary: 15, Geology

Mariano Barbacid International Member (elected 2012)
Spanish National Cancer Research Center (CNIO)
Primary: 41, Medical Genetics, Hematology, and Oncology

Esteban Domingo International Member (elected 2020)
Consejo Superior de Investigaciones Cientificas (CSIC)
Primary: 44, Microbial Biology

Luis Enjuanes International Member (elected 2021)
Consejo Superior de Investigaciones Cientificas
Primary: 61, Animal, Nutritional, and Applied Microbial Sciences

Antonio Garcia-Bellido International Member (elected 1987)
Consejo Superior de Investigaciones Cientificas (CSIC)
Primary: 26, Genetics
Secondary: 22, Cellular and Developmental Biology

Francisco Guinea International Member (elected 2017)
IMDEA Nanociencia (Imdea Nanoscience)
Primary: 33, Applied Physical Sciences
Secondary: 13, Physics

Ramon Margalef International Member (elected 1985)
May 16, 1919 - May 23, 2004

Andreu Mas-Colell International Member (elected 1997)
Universitat Pompeu Fabra
Primary: 54, Economic Sciences

Gines Morata International Member (elected 2018)
Consejo Superior de Investigaciones Cientificas (CSIC)
Primary: 22, Cellular and Developmental Biology
Secondary: 26, Genetics

Severo Ochoa Member (elected 1957)
September 24, 1905 - November 1, 1993

Victoria Reyes-Garcia International Member (elected 2021)
Universitat Autonoma de Barcelona
Primary: 51, Anthropology
Secondary: 64, Human Environmental Sciences

Margarita Salas International Member (elected 2007)
November 30, 1938 - November 7, 2019