Pemex

Pemex is the Mexican state-owned petroleum corporation managed and operated by the Mexican government. It was formed in 1938 by nationalization and expropriation of all private oil companies in Mexico at the time of its formation, making PEMEX an enduring symbol of Mexican nationalism. Pemex had total assets worth $101.8 billion in December 2019 and as of 2009 was Latin America's second-largest enterprise by annual revenue, surpassed only by Petrobras. The company is the seventh-most polluting in the world according to The Guardian.