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Mayo A. Shattuck III

Mayo A. Shattuck III

Chairman, Exelon Corporation


Mayo Shattuck is Chairman of Chicago-based Exelon Corporation, the nation’s number one competitive energy provider. Exelon’s electric and gas utilities serve approximately 6.6 million customers in Illinois, Maryland and Pennsylvania, and its generation company operates the largest fleet of nuclear power plants in the nation. Exelon’s competitive retail and wholesale energy business, Constellation Energy, provides energy products and services to customers in 46 states, including more than 90,000 business and public sector customers and nearly 1 million residential customers.

Professional History

Prior to joining Exelon, Shattuck was the Chairman, President and Chief Executive Officer of Constellation Energy, a position he held from 2001 to 2012. Constellation Energy was a Fortune 200 company that owned energy-related businesses, including a wholesale and retail power marketing and merchant generation business in North America. It also operated the Baltimore Gas and Electric Company, which serves 1.2 million electric customers and 630,000 natural gas customers in central Maryland. Shattuck was previously at Deutsche Bank, where he served as Chairman of the Board of Deutsche Banc Alex. Brown and, during his tenure, served as Global Head of Investment Banking and Global Head of Private Banking.

From 1997 to 1999, he served as Vice Chairman of Bankers Trust Corporation, which merged with Deutsche Bank in June 1999. From 1991 until 1997, Shattuck was President and Chief Operating Officer and a Director of Alex. Brown Inc., which merged with Bankers Trust in September 1997.

Shattuck is immediate past Chairman of the Board of the Institute of Nuclear Power Operations (INPO) and is a member of the Executive Committee of the Board of Edison Electric Institute (EEI).  He is also Co-Chairman of the Center for Strategic & International Studies (CSIS) Commission on Nuclear Policy in the United States and Executive Committee member of the Council on Competitiveness. 

Shattuck currently serves on the Board of Directors for Gap Inc. and is Chairman of its Audit and Finance Committee.  He also serves as a Director for Capital One Financial Corporation, where he is Chairman of its Compensation Committee.

Civic and Charitable Commitment

Shattuck is a member of the Board of Trustees of Johns Hopkins Medicine and Johns Hopkins University and is Chairman of the Board of Visitors of the University of Maryland, Baltimore County. He is the past Chairman of the United Way of Central Maryland (UWCM) campaign and is on the national board of The First Tee.

Education and Family

Shattuck was born in 1954 in Massachusetts and received his Bachelor of Arts degree from Williams College and his master’s degree in business administration from Stanford University, where he graduated as an Arjay Miller Scholar. Shattuck has received an honorary Doctor of Public Service degree from the University of Maryland, Baltimore County.

Shattuck has five children; Mayo IV, Katie, Spencer, Wyatt and Lillian.

Awards and Recognition

Shattuck has been widely recognized for his civic and professional leadership.  Among his awards, he has received Loyola University’s Business Leader of the Year; Ernst & Young’s Master Entrepreneur of the Year, and Noble & Greenough’s Distinguished Graduate Award.  He has also received the Boy Scouts Distinguished Citizen Award, and was named the United Way of Central Maryland’s Philanthropist of the Year.

Mayo A. Shattuck III