Self Trade Bank, a Spanish online wealth provider, has been acquired jointly by private equity firm Warburg Pincus and Javier Marín Romano, a Spanish private banking veteran.
The bank has been sold by the Boursorama subsidiary of Societe Generale. Terms of the transaction were not disclosed.
Mr Marín Romano, a former chief executive of Banco Santander, has also been the head of the Santander Global Private Banking, Asset Management and Insurance division.
"For more than 15 years, Self Bank has empowered its clients by providing innovative and valuable solutions that allow them to take control of their financial future," said Mr Marín.
"I look forward to working closely with Warburg Pincus' team and Self Bank's management to capitalise on Self Bank's strong foundation and together, reposition the company for its next chapter of growth."
The transaction is expected to close by the end of 2018, subject to regulatory approval.