Portovesme S.r.l. was established on 2 July 1999 through ENI’s​ acquisition of the Portovesme (established in 1970) and San Gavino (established in 1929) production sites. Portovesme S.r.l. is a​ wholly owned subsidiary of Glencore International Plc, a global​ leader in the commodities sector, particularly in non-ferrous metals.​

Currently, Portovesme S.r.l. is the only Italian zinc and lead​ producer and is considered to be of national and strategic importance​ by the Italian government. With around 1250 employees​ permanently on-site.​