Novo Banco, the Portuguese bank created out of failed lender Banco Espírito Santo in August, has received at least four expressions of interest from potential buyers before a December 31 deadline, a person familiar with the matter said Monday.

Novo Banco, under chief executive Eduardo Stock da Cunha, is seeking to finalize a sale by the middle of 2015. Interested parties include Portugal's Banco BPI, Spain's Banco Santander, China's Fosun International and US private equity firm Apollo Global Management, according to a person close to the sale process.