PPG Industries Inc $8,551,769 Pentair Inc $117,594 Albemarle Corp $226,792 Black Box Corp $0 Northrop Grumman Corp $3,419,090 PPG Industries Inc $8,551,769 Pentair Inc $117,594 Albemarle Corp $226,792 Black Box Corp $0 Northrop Grumman Corp $3,419,090