Rome - Enel SpA is expected to file an initial public offering prospectus for its renewable energy unit next Thursday in one of Europe's biggest stock market listings in years, according to a person familiar with the matter.

Enel aims to raise more than €3 billion ($3.6 billion) by listing a 30% stake in Enel Green Power SpA, which includes the Italian utility's wind and hydroelectric operations, the person said Thursday. An Enel spokeswoman declined to comment.