Exelon Corp. is a leading energy provider, with transmission and distribution operations in the U.S. and headquarters in Chicago. Exelon spun off its generation business, which was about 60% nuclear, as Constellation Energy at the end of 2021. Constellation is now a publicly traded company focused on generation and competitive distribution, while Exelon focuses on regulated transmission and distribution. Through its regulated utility subsidiaries, Exelon delivers electricity and natural gas to about 10 million customers, primarily in central Maryland (Baltimore Gas & Electric Co.), northern Illinois (ComEd), and southeastern Pennsylvania (PECO). About 90% of EXC's 2022 revenues were from the electricity busi