PARIS (AFP) ― The chairman of BNP Paribas has resigned, some three months after the French bank was hit by a record $8.9 billion fine for violating U.S. sanctions, the bank said.

Baudoin Prot, 63, who has headed the bank since 2011, was stepping down as of Dec. 1 “for personal reasons,” the bank said in a statement following a meeting of the board late on Friday.

Prot will be replaced by Jean Lemierre, 64, one of his close advisors and a key figure in negotiating BNP Paribas’ settlement with U.S. authorities.

Prot’s resignation, which was first reported by a source close to the matter on Tuesday, comes almost three months after the giant French bank pleaded guilty to U.S. criminal charges of violating sanctions on Iran, Sudan and other countries.

Prior to becoming chairman, Prot served as chief executive of BNP Paribas from 2003-2011, the period in which many of the violations of U.S. sanctions law took place.

U.S. officials said BNP Paribas deliberately hid thousands of transactions with Iran, Sudan, Myanmar and Cuba, countries that were sanctioned for terrorism and human rights violations.

The bank agreed to plead guilty to one count of conspiring to violate sanctions, making it the first bank found guilty in a sanctions case.