Facebook CEO Mark Zuckerberg leaves the Elysee Palace after a meeting with French President Emmanuel Macron.
Aurelien Meunier | French Select | Getty Images
Shares were down more than 2% following the news. The report says employees at the company are concerned that the emails could come under scrutiny during an investigation from the Federal Trade Commission.
The FTC is investigating whether security lapses related to the Cambridge Analytica scandal violated a 2012 consent decree between the agency and Facebook, according to the report.
The emails, which were described to the Journal reporters but not seen, reportedly show that Zuckerberg raised questions about how the company was sharing data with third-party developers, suggesting he knew of potential problems.