FILE PHOTO: Bill Ackman, chief executive officer and portfolio manager at Pershing Square Capital Management, speaks during the SALT conference in Las Vegas, Nevada, U.S. May 18, 2017. REUTERS/Richard Brian/File Photo
FILE PHOTO: Bill Ackman, chief executive officer and portfolio manager
FILE PHOTO: Bill Ackman, chief executive officer and portfolio manager at Pershing Square Capital Management, speaks during the SALT conference in Las Vegas
