Alberto Alcocer is a Spanish businessman and the ex-husband of billionaire heiress Esther Koplowitz who has an estimated net worth of $1.14 billion as of June 2016 according to Forbes. He was ranked 1153rd in the list of World Billionaires in 2012 and 993rd in 2011.

Born Alberto Alcocer Torra on December 17, 1942 in Madrid, Spain, he studied Law in the Universidad Complutense de Madrid. He is the co-owner of Alcor Holding, along with his cousin Alberto Cortina who married Esther’s sister, Alicia. He and Cortina also ran Construcciones y Contratas which is now called FCC. It was a large industrial company that their wives inherited. Together, they managed the business from the early 70's until both marriages ended in 1989. Alcocer and Cortina were the managing directors in 1976 and transformed the company in a group of more than 30 societies. In 1978, they acquired 5% of the Development bank which belonged to the Central Bank. After three years, they acquired some participation in the cement company, Portland Valderrivas, which was property of Banesto.

Alcocer and Cortina were dubbed Los Albertos by the press. After their separation from their wives, they turned into banking and ran Banco Zaragozano that they acquired in 1982. In 2004, they both sold their combined 40% stake to Barclays. Their wealth in investment is now at the Alcor Holding that they both own.