Exelon Corporation Political Contributions Report Reporting Period: July 1, 2017 – December 31, 2017 Exelon Corporation’s (Exelon) success depends on sound public policies at the national, state and local levels. Issues vital to Exelon’s ability to recognize value for its stakeholders are debated and decided in the U.S. Congress, state legislatures and local forums across the country. Federal and Pennsylvania law prohibit companies from making political contributions to Federal and Pennsylvania candidates. The laws of Illinois, Maryland and other states and some local governments limit the amount that Exelon and its affiliated companies can give to political candidates and PACs. Other states and local governments prohibit corporate contributions to election campaigns. Exelon engages in political activity in accordance with all relevant state and Federal laws. Exelon Corporation, Atlantic City Electric Company, Baltimore Gas and Electric Company, PECO Energy Company and Potomac Electric Power Company have established political action committees that are funded solely through voluntary employee contributions (ExelonPAC, ACE PAC, BGEPAC, PECOPAC and Maryland Pepco PAC). Commonwealth Edison Company and Exelon Generation Company also have Illinois state political action committees which may be funded by both employee and corporate contributions (ComEd PAC and ExGenPAC). Exelon provides limited administrative support to all seven PACs. These PACs offer eligible employees a direct means to voluntarily participate in shaping public policy and expressing views on issues related to our business. The PACs operate in accordance with all relevant state and Federal laws. Information about ExelonPAC is available on the website of the Federal Election Commission at www.fec.gov. In the interest of transparency for our shareholders and stakeholders, Exelon posts its Corporate Political Contributions Guidelines on its website. These Guidelines are intended to provide corporate governance, control, oversight and procedural guidance for corporate contributions of money, property or services for political activities in Illinois, Maryland and other states that allow corporate contributions to the political process and for political expenditures in areas where permitted. Exelon’s political contributions during the reporting period were all made in accordance with its Corporate Political Contributions Guidelines. Exelon also makes available a report listing Exelon’s political contributions (the “Report”). The Report also sets forth the United States trade associations and other similar non‐profit organizations to which Exelon annually paid dues of $50,000 or more. Exelon has asked these organizations to identify the portion of those dues that were used for expenditures or contributions that are non‐deductible under Section 1 162(e)(1)(B) of the Internal Revenue Code. The Report will be updated and reviewed by the Corporate Governance Committee of the Exelon Board of Directors semi‐annually. 2017 Political Contributions (Reporting Period July 1 through December 31) During the reporting period of July 1, 2017 through December 31, 2017, the entities listed below made the following contributions to political parties, political committees, candidates for political office, and other entities organized and operating under 26 U.S.C. Section 527. Baltimore Gas and Electric Company (BGE) Maryland Republican Party $9,000 Commonwealth Edison Company (ComEd) ‐ ComEd’s contributions set forth below for the reporting period totaled $181,180. Brady for Senate Inc. $5,000 Citizens for Durkin $5,000 Citizens for Durkin $1,000 Republican State Senate Campaign $5,000 Committee Senate Democratic Victory Fund $5,000 Senate Democratic Victory Fund $5,000 Democratic Majority $22,200 Downstate Democratic Caucus $580 Democratic Party of Illinois $22,200 Friends of Michael J. Madigan $11,100 Friends of Jesse Ruiz $11,100 Citizens for Erika Harold $11,100 Friends of Kwame Raoul $11,100 Friends of Nancy Rotering $11,100 House Republican Organization (HRO) $5,000 Republican State Senate Campaign $2,500 Committee Citizens for John Cullerton $5,000 Citizens for Durkin $5,000 Friends of Jaime M. Andrade $250 Friends of Luis Arroyo $250 Friends of Dan Brady $250 2 Friends of Peter Breen $250 Committee to Elect Dan Burke $250 Friends of Tim Butler $250 Friends of John C. D'Amico $250 William Davis for State Representative $250 Friends for State Rep. Anthony DeLuca $250 Team Demmer $250 Citizens for Durkin $250 Citizens for Marcus C. Evans, Jr. $250 Citizens for Sara Feigenholtz $250 Friends of Laura Fine $250 Friends of Robyn Gabel $250 Friends of Sonya Marie Harper $250 Citizens for Gregory Harris $250 Committee to Elect Jay Hoffman $250 Friends of Fran Hurley $250 Friends of Stephanie Kifowit $250 Citizens for Lou Lang $250 Citizens for Michael P McAuliffe $250 David McSweeney for State $250 Representative Friends of Christian Mitchell $250 Friends of Anna Moeller $250 Friends of Robert "Bob" Rita $250 Friends of Elgie Sims $250 Friends of Tabares $250 Friends of Arthur Turner II $250 Friends of Larry Walsh Jr $250 The People for Emanuel "Chris" Welch $250 Friends of David A. Welter $250 Friends of Ann M Williams $250 Friends of Elect Kathleen Willis $250 Zalewski for State Representative $250 Anderson for Illinois $250 Friends of Omar Aquino $250 Friends of Jason Barickman $250 Bennett for Senate $250 Brady for Senate Inc $250 3 Citizens for John Cullerton for State Senate $250 Friends of Bill Cunningham $250 Citizens for Michael E Hastings $250 Citizens for Linda Holmes $250 Friends of Mattie Hunter $250 Friends of Toi Hutchinson $250 Friends of Dave Koehler $250 Citizens for Lightford $250 Friends of Iris Y. Martinez $250 McGuire for Senate $250 Friends for Mulroe $250 Citizens for Antonio Tony Munoz $250 Citizens for Laura M. Murphy $250 Citizens for Chris Nybo $250 Friends of Sue Rezin $250 Friends of Chapin Rose $250 Friends of Martin Sandoval $250 Stadelman for State Senate $250 Citizens for Donne Trotter $250 Friends of Patricia Van Pelt $250 Commonwealth Edison Co‐Affiliate of $22,200 Exelon Corp, PAC (ComEdPAC) Constellation New Energy Gas Division (CNEGD) Senator Robert G. Ortt $250 Exelon Business Services Company, LLC (BSC) ‐ BSC’s contributions set forth below for the reporting period totaled $150,000. Democratic Governors Association $75,000 Republican Governors Public Policy $75,000 Committee Exelon Generation Company, LLC (ExGen) ‐ ExGen’s contributions set forth below for the Reporting Period totaled $242,320. Illinois Democratic Majority $22,200 4 Democratic Party of Illinois $22,200 Erika Harold, Candidate $11,100 House Republican Organization $10,000 Jesse Ruiz, Candidate $11,100 Nancy Rotering, Candidate $11,100 Rep. Barbara Flynn Currie $1,000 Rep. Dan Brady $520 Rep. David A. Welter $2,500 Rep. Emanuel "Chris" Welch $500 Rep. Laura Fine $500 Rep. Lawrence Walsh $10,000 Rep. Lou Lang $2,000 Rep. Michael J. Madigan $11,100 Rep. Nick Sauer $500 Rep. Robert Rita $2,000 Rep. Robyn Gabel $250 Rep. Ryan Spain $800 Rep. Sara Feigenholtz $500 Rep. Tony McCombie $2,500 Rep. William Davis $600 Republican State Senate Campaign $12,200 Committee Senator Chris Nybo $1,000 Senate Democratic Victory Fund $10,000 Senator Bill Brady $10,000 Senator Dave Koehler $1,000 Senator Iris Y. Martinez $1,000 Senator Jennifer Bertino‐Tarrant $600 Senator John Cullerton $5,000 Senator John Curran $250 Senator Kwame Raoul $11,100 Senator Mattie Hunter $7,500 Senator Michael E. Hastings $1,000 Senator Neil Anderson $5,000 Senator Pamela J. Althoff $1,000 Senator Pat McGuire $700 Senator Sue Rezin $1,000 Senator Terry Link $1,500 Senator Toi W. Hutchinson $2,500 Senator Tom Cullerton $500 Will County Executive Larry Walsh $1,000 5 Maryland Maryland Republican Party $8,000 Michigan Michigan Republican Party $2,500 Other Republican State Leadership Committee $35,000 Ginna Nuclear Power Plant, LLC (Ginna) ‐ Ginna’s contributions set forth below for the reporting period totaled $3,350. New York NY State Republican Assembly Campaign $600 Committee IPPNY PAC $1,250 Senator Rich Funke $500 Senator Pam Helming $1,000 Nine Mile Point Nuclear Station, LLC New York IPPNY PAC $1,250 Pepco Holdings LLC Maryland Republican Party $8,000 6 Independent Expenditures and Ballot Measures Constellation New Energy, Inc. (CNE) made the following expenditures on Ballot Measures. CNE’s contributions set forth below for the reporting period totaled $14,894. Ohio City of Harrison $7,043 Township of Batavia $7,851 Other Expenditures During the reporting period, Exelon and its subsidiaries made no other political expenditures. 7 Trade Associations Set forth below are the trade associations and other similar non‐profit organizations to which Exelon Corporation and its subsidiaries (including Constellation) paid dues of $50,000 or more during calendar year 2017. Exelon Corporation has asked these organizations to identify the portion of those dues that were used for expenditures or contributions that are non‐deductible under Section 162(e)(1)(B) of the Internal Revenue Code. Information, if any, provided by each organization is included in the table. The figures presented represent total amounts for calendar year 2017. Organization Exelon Dues or Payments Portion of Exelon’s dues made in 2017 used for expenditures or contributions that are non‐deductible under Section 162(e)(1)(B) of the Internal Revenue Code American Gas Association $402,782 $25,778 (BGE) American Gas Association $261,084 $16,709 (PECO) American Gas Association $61,371 $3,928 (PHI) Edison Electric Institute $4,121,922 $577,068 Electrical Association of $75,000 $0 Philadelphia Energy Association of $287,815 $11,023 Pennsylvania Greater Philadelphia $70,000 $3,500 Chamber of Commerce Illinois Energy Association $297,346 $104,071 Illinois Manufacturers’ $135,000 $20,250 Association Nuclear Energy Institute $9,752,547 $414,483 US Chamber of Commerce $250,000 $62,500 8.