Calvin Butler will head Chicago-based Exelon, owner of BGE, under accelerated succession plan

Longtime Baltimore utility executive and business leader Calvin G. Butler Jr. will become one of the nation’s few Black Fortune 500 CEOs later this year after he was tapped Wednesday to become the next CEO of Exelon Corp., which owns Baltimore Gas and Electric Co. Under an accelerated succession plan announced late Wednesday, Exelon’s board of directors elected Butler to serve as president and CEO starting Dec. 31. Butler also will join Exelon’s board.