ENI UNIT AGIP PETROLI BUYS STAKE IN U.S. COMPANY A subsidiary of state energy concern Ente Nazionali Idrocarburi <ENTN.MI> (ENI) said it has acquired a 50 pct stake in <Steuart Petroleum Co>, an independent U.S. Oil products company. Financial terms were not disclosed. Agip Petroli Spa said in a statement that the remaining 50 pct of the U.S. Firm is owned by <Steuart Investment Co>, a holding company which also has interests transportation, hotels and insurance. The Italian firm said Steuart Petroleum operates primarily on the East Coast of the U.S.