Guillermo Alberto Santiago Lasso Mendoza (born 16 November 1955) is an Ecuadorian businessman and politician. In the Ecuadorian general election, 2013 he was presidential candidate for the party Creating Opportunities. He landed in second place with 22.68% of valid votes but as incumbent President Rafael Correa received more than double that amount, namely 57.17%. Lasso is, through a trust named with his initials, GLM, the largest share holder in Banco de Guayaquil, where he has been executive president for more than 20 years.
In early 2017, Lasso launched his second presidential campaign to succeed incumbent President Correa for the rightwing Creating Opportunities in the 2017 presidential elections, as Correa had already served his two-term constitutionally defined limit. His campaign's theme was one of "change" and he pledged to create 1 million more jobs in Ecuador. Lasso received 48.84 % and lost to Lenín Moreno.
In February 2017, Lasso said in an interview with a British newspaper that in case of his victory in the presidential election he would “cordially ask” Julian Assange, the WikiLeaks founder, to leave the Ecuadorian Embassy in London within 30 days.
According to information from the Inspectorate of Banks of Panamá, revealed by the Argentine newspaper Página 12, Guillermo Lasso is associated with forty-nine offshore companies located in tax havens. His fortune would have jumped from $ 1 million to $ 31 million between 1999 and 2002, after his brief passage to the government.