Its board, which Greenberg has chaired since 2000, also included Putnam's former chief executive, Lawrence Lasser, until he was ousted last November.

FORBES: Putnam's Fox Joins NYSE Henhouse

Lasser's dismissal followed charges by the U.S. Securities and Exchange Commission of securities fraud at Putnam, which allegedly failed to reveal trades employees conducted for personal profit and at the expense of mutual fund shareholders.

FORBES: Putnam's Fox Joins NYSE Henhouse