The Clinton Global Initiative has become the most popular gathering for top corporate leaders, Reuters reports.

According to a study by the public-relations firm Weber Shandwick, the former President Bill Clinton’s September gathering in New York has displaced the World Economic Forum, the latest edition of which opens Wednesday, in Davos, Switzerland, as the main event on CEO calendars.

Mr. Clinton’s celebrity status, his ties to the current U.S. administration, and the summit’s focus on philanthropy are in part responsible for its popularity, said Barbara Kellerman, a professor at Harvard’s Kennedy School.