INA-Industrija nafte, d.d. (ZGSE:INA) and Prvo plinarsko drustvo d.o.o. are looking to acquire 53% to 55% stake in Petrokemija d.d. (ZGSE:PTKM) from Croatian Government and others. INA-Industrija nafte, d.d. and Prvo plinarsko drustvo are seeking clearance from Competition Council of Bosnia and Herzegovina to acquire a stake of 53% to 55% stake in Petrokemija, the regulator said.