The sale, part of a wider re-privatisation of Greek banks bailed out during a decade-long debt crisis, attracted strong demand and was more than eight times oversubscribed, one of the sources said.

The valuation was at the top end of the original pricing indication of 3.7-4 euros.

The strong interest is a positive sign after Greece nearly fell out of the single currency before receiving three international bailouts between 2010 and 2015.

Piraeus Bank, the country's third largest lender, is the third of four big banks to be privatised since last autumn after the Greece won back its investment grade credit rating.

Share allocations are likely on Thursday, the second source said.

(Reporting by Lefteris Papadimas; Editing by Edward McAllister, Kirsten Donovan)