Steven H. Collis has been appointed president and chief operating officer of AmerisourceBergen Corp., effective immediately. Mr. Collis was previously executive vice president of AmerisourceBergen and president of its subsidiary, AmerisourceBergen Drug Corp. (ABDC). He continues to report to R. David Yost, AmerisourceBergen’s chief executive officer. Mr. Collis is now responsible for all AmerisourceBergen business units including ABDC, ABSG, AmerisourceBergen Consulting Services (ABCS), and ...