Exelon Utilities

Upon the closing of the merger in March 2012, Exelon Utilities, which includes BGE, ComEd and PECO, became one of the largest electric and natural gas distribution companies in
the nation.

The combined distribution companies deliver electricity to approximately 6.6 million customers in central Maryland, northern Illinois and southeastern Pennsylvania and natural gas to approximately 1.2 million customers in
central Maryland and southeastern Pennsylvania.

In 2012, the merged utilities completed significant integration efforts,
including the creation of standardized performance measurement and benchmarking systems, and the implementation of peer groups across the utilities, with the objective of enhancing collaboration and standardizing
best practices.