Axel Kicillof headed by Hernán Lorenzino. After that, on November 18, 2013, Kicillof officially became Minister of Economy. Kicillof was instrumental in the renationalization of YPF. President Cristina Fernández de Kirchner named Kicillof to the post of Secretary (or Deputy Minister) for Economic Policy and Development Planning in December 2011. He took academic leave to assume this post. In this position, Kicillof oversaw the controversial 2012 nationalization of YPF, the Argentine oil company then controlled by the Spanish energy firm Repsol. It was the largest expropriation in Argentina's history. He justified this action as part of a needed reversal of the Argentinian
Repsol Ibero America. The acquisition better positioned Repsol as a multinational company. Repsol’s acquisition of YPF also increased its capital to 288 million shares worldwide. Repsol's presence in Latin America was one of the keys to corporate growth. It was the first full year after the acquisition of YPF and the consolidation of Gas Natural SDG by global integration. The company's business structure was more balanced and international. Then in December 2001 Repsol completed an asset exchange agreement with Petrobras, making it the second largest consolidated oil company in Brazil. The same year Repsol announced new discoveries in Libya, Indonesia, Spain,