ReliabilityFirst Member Companies by Sector Updated: August 2, 2021 (Membership: Regular - 39 Associate - 6, Adjunct - 10) Small LSE (9/0) Medium LSE (3/0) Large LSE (2/0) Allegheny Electric Cooperative, Inc. Consumers Energy Company American Electric Power Service Corp. Buckeye Power Inc. DTE Electric Exelon Corporation City of Vineland NJ Wisconsin Electric Power Company Cloverland Electric Cooperative (CEC) Lansing Board of Water and Light Michigan Public Power Agency Old Dominion Electric Cooperative Southern Maryland Electric Cooperative, Inc. Wabash Valley Power Association, Inc. Regional Transmission Organizations Supplier (8/3) Transmission Company (15/3) Adjunct Members (10) (RTOs) (2/0) Midcontinent Independent System Operator, Inc. AES North America Generation American Transmission Co., LLC AEP Energy Partners, Inc. PJM Interconnection, LLC Calpine Energy Services LP Appalachian Power Co. Darby Energy, LLLP CMS Enterprises Company Duke Energy Shared Services, Inc. DataCapable, Inc. Dominion Energy, Inc. Duquesne Light Company Illinois Citizens Utility Board Dynegy Inc. FirstEnergy Service Company Office of Peoples Counsel District of Columbia Hazleton Generation LLC Hoosier Energy Rural Electric Cooperative Inc. Ohio Power Co. Indiana Michigan Power Co. Indianapolis Power & Light Company Pennsylvania Office of Consumer Advocate Morgan Stanley Capital Group Inc. International Transmission Company Proven Compliance Solutions, Inc. NextEra Energy Resources, LLC Michigan Electric Transmission Company, LLC Tennessee Valley Authority Talen Energy Supply, LLC Neptune Regional Transmission System, LLC Utility Services, Inc. Tenaska, Inc. Northern Indiana Public Service Company Ohio Valley Electric Corporation PPL Electric Utilities Corporation Public Service Enterprise Group Inc. Rockland Electric Company The Dayton Power and Light Co. Vectren Energy Delivery of Indiana, Inc. Wolverine Power Supply Cooperative, Inc. Italics indicates the company is an Associate Member.