Petróleo do Cruzeiro do Sul S.A. or PetroCS (IPA: ˌpɛtɾoˈks) was founded in 1974 as a semi-public South Crossic national energy corporation headquartered in Santana, Southern Cross Republic. The Government of the Southern Cross Republic is the largest shareholder in PetroCS with 65% of the shares. The ownership interest is managed by the South Crossic Ministry of Mines and Energy.