The Toronto-based firm has shown president and CEO Jamie Sokalsky the door two years into the job, and less than three months after a breakdown in merger talks with its largest rival.
Production at its five operating silver mines in Mexico hit a record of almost 3.86 million equivalent ounces of silver for the second quarter ending June 30.
As BHP considers the sale of almost all of the businesses that Billiton brought to the 2001 merger deal, experts say the firm is likely to end up leaving London.