Westinghouse Air Brake Technologies Corp $6,742,693 Matthews International Corp $435,563 MSA Safety Incorporated $2,224,139 Allison Transmission Holdings Inc $3,309,137 Westinghouse Air Brake Technologies Corp $6,742,693 Matthews International Corp $435,563 MSA Safety Incorporated $2,224,139 Allison Transmission Holdings Inc $3,309,137