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César Alierta (* 5. May 1945 in Zaragoza; † 10. January 2024 in Zaragoza) was a spanischer Manager und Vorstandsvorsitzender von Telefónica. He was 78 years old. His education included Columbia Business School and University of Zaragoza. He worked at Telefónica. He was awarded the Grand Cross of the Order of the Second of May. His cause of death was pneumonia.