Enrico Mattei was an Italian public administrator. After World War II, he was given the task of dismantling the Italian petroleum agency Agip, a state enterprise established by Fascist Italy. Instead, Mattei enlarged and reorganized it into the National Fuel Trust. Under his direction, ENI negotiated important oil concessions in the Middle East as well as a significant trade agreement with the Soviet Union, which helped break the oligopoly of the "Seven Sisters" that dominated the mid-20th-century oil industry. He also introduced the principle whereby the country that owned exploited oil reserves received 75% of the profits.

Eni S.p.A. is an Italian multinational energy company headquartered in Rome. It is considered one of the "supermajor" oil companies in the world, with a market capitalization of €50 billion, as of 31 December 2023. The Italian government owns a 30.33% golden share in the company, 4.37% held through the Ministry of Economy and Finance and 25.96% through the Cassa Depositi e Prestiti. The company is a component of the Euro Stoxx 50 stock market index.