Sociedad Minera de Santander S.A.S. (Minesa), formerly AUX, is a Colombian gold miner focused on developing the underground Soto Norte gold project, located in the country's Santander department. Minesa is controlled by the Mubadala Investment Company, a corporation based in the United Arab Emirates. The company aims at producing 9Moz of gold during a mine lifespan of over 20 years. The project is expected to begin construction in 2018, with production starting in 2021. Sociedad Minera de Santander was founded in 2015, and it has offices in Bucaramanga and Bogota.