All four bidders for Portugal's 21% interest in EDP-Energias de Portugal SA (EDP.LB) have offered a premium over the EUR1.9 billion market value of the stake, with China's Three Gorges Corp. leading the pack, a person familiar with the deal said Monday.

According to the person, the government will also take into consideration the strategic plan each of the companies offer for the stake, being sold as part of a bailout agreement between
Portugal and the European Union and the International Monetary Fund. Under the aid, Portugal has committed to shrink the size of the public sector and the government's control over the private sector.

The Chinese company, German utility E.ON AG (EOAN.XE),
Brazil 's Centrais Eletricas Brasileiras SA (EBR) and Companhia Energetica de Minas Gerais-CEIMG (CIG) filed their offers Friday.

The Portuguese government is expected to choose the winner next week, the person added.