The California Public Employees Retirement System (CalPERS) has thrown its weight behind the current Heinz board in the proxy contest between the Trian Group and Heinz management. The nation's largest public pension fund has said that it will use its 1.66m shares to re-elect all 12 members of the board, a decision that, Heinz told just-food, demonstrates that the company is on the right track to drive returns to shareholders.