On March 12, 2012, the Board appointed Jonathan W. Thayer as Executive Vice President and Chief Financial Officer of Exelon. Prior to his appointment as Executive Vice President and Chief Financial Officer of Exelon, Mr. Thayer, age 40, served as Vice President and Managing Director, Corporate Strategy and Development, of Constellation, Treasurer of Constellation, Senior Vice President and Chief Financial Officer of Baltimore Gas and Electric Company, and Senior Vice President and Chief Financial Officer of Constellation.