Exxon, which still figured on the list in early February, has since been removed while Indonesia's Pertamina and a Syrian oil company have been added.
Iraq's oil minister Abdul Kareem Luaibi had said a week ago that Baghdad was still studying whether to allow Exxon Mobil to take part due to a dispute over contracts it signed with Iraqi Kurdistan.
The Iraqi government considers as invalid any deals signed with the Kurdistan Regional Government (KRG), which in turn states that all and any deals it has signed comply with the country's new constitution.
The oil ministry published the final contenders for the round on Thursday, with licences due to be awarded on 30 and 31 May.
Abdul Mahdy Al-Ameedi, director general of the ministry’s petroleum contracts and licencing directorate (PCLD), said all 47 bidders had been issued model contracts for the round.
Iraq is offering 12 large exploration blocks of an average size of 6500 square kilometres in the latest round, with seven thought to be gas blocks and five crude.
The PCLD said the offering was targeted at expanding Iraq’s natural gas production capacity with a view to satisfying power generation needs, creating gas-based industries and increasing national oil reserves.
Since launching the first licensing round in 2008, Iraq has awarded 14 contracts to date in three rounds.
The country also signed a major joint venture with Shell and Mitsubishi to capture and monetise associated natural gas produced in southern Iraq under a separate agreement.
Japan and Russia entered the largest number of bids with nine and five respectively in a list that also includes supermajors BP, Chevron, Shell and Total.