2018 EIM Annual Report

EIM MEMBERS A S O F D E C E MB E R 3 1 , 2 0 1 8

AES Corporation (The) Algonquin Power & Utilities Corp. ALLETE, Inc. Alliant Energy Corporation Ameren Corporation American Electric Power Service Corporation American States Water Company Apache Corporation Associated Electric Cooperative, Inc. Atmos Energy Corporation Avangrid, Inc. Avista Corporation Basin Electric Power Cooperative Berkshire Hathaway Energy Company f/k/a MidAmerican Energy Holdings Company Black Hills Corporation British Columbia Hydro and Power Authority California Independent System Operator Corporation Calpine Corp. CenterPoint Energy, Inc. Central Arizona Water Conservation District Chesapeake Energy Corporation Chugach Electric Association, Inc. Citizens Energy Group City of Richmond, Department of Public Utilities City Public Service of San Antonio, Texas Clearway Energy, Inc. Cleco Corporate Holdings LLC CMS Energy Corporation Colorado Springs Utilities Consolidated Edison Company of New York, Inc. Cooperative Energy

Crestwood Equity Partners, LP Dairyland Power Cooperative Deseret Generation & Transmission Cooperative Devon Energy Corporation District of Columbia Water and Sewer Authority Dominion Energy, Inc.

Heorot Power Holdings LLC Hydro One Limited

NorthWestern Corporation NRG Energy, Inc. OGE Energy Corp.

SCANA Corporation SEMCO Holding Corporation Seminole Electric Cooperative, Inc. Sempra Energy South Carolina Public Service Authority (Santee Cooper) Southern Company

Hydro-Quebec IDACORP, Inc. Imperial Irrigation District Intermountain Power Agency/Intermountain Power Service Corporation Iroquois Gas Transmission System, LP ISO New England JEA and FPL d/b/a St. Johns River Power Park Kinder Morgan, Inc. LDC Funding LLC Long Island Power Authority Los Angeles Dept. of Water and Power Magellan Midstream Partners, LP MDU Resources Group, Inc. Metropolitan Water District of Southern California MGE Energy, Inc. Modesto Irrigation District Mountaineer Gas Company National Fuel Gas Company National Grid plc New Jersey Resources Corporation New York Independent System Operator, Inc. New York Power Authority NextEra Energy, Inc. NiSource Inc. Midcontinent Independent System Operator, Inc. Missouri Basin Municipal Power Agency d/b/a Missouri River Energy Services

Oglethorpe Power Corporation Ohio Valley Electric Corporation Old Dominion Electric Cooperative Omaha Public Power District Oncor Electric Delivery Holdings Company LLC ONE Gas, Inc. ONEOK, Inc. & ONEOK Partners, LP Ontario Power Generation Inc. PG&E Corporation Philadelphia Gas Works Pinnacle West Capital Corporation PJM Interconnection, LLC Plains All American Pipeline, L.P. PNM Resources, Inc. Public Service Enterprise Group Incorporated Public Utility District No. 1 of Chelan County Public Utility District No. 1 of Snohomish County Public Utility District No. 2 of Grant County, WA Public Utility District No.1 of Douglas County Public Utility Risk Management Services Joint Self Insurance Puget Holdings LLC QEP Resources, Inc. RGC Resources, Inc. Sacramento Municipal Utility District Salt River Project Agricultural Improvement and Power District Portland General Electric Company PowerSouth Energy Cooperative PPL Corporation

Doyon Utilities, LLC DQE Holdings LLC DTE Energy Company Duke Energy Corporation East Kentucky Power Cooperative, Inc. Edison International El Paso Electric Company Electric Reliability Council of Texas, Inc. Emera Incorporated Enable Midstream Partners, LP Enbridge Inc. Energir, Inc. Energy Transfer Equity, L.P. Entergy Services, Inc. EOG Resources, Inc. EQT Corporation Equitrans Midstream Corporation Evergy, Inc. Eversource Energy Exelon Corporation FirstEnergy Corp. FortisUS Inc. GenOn Holdings, LLC GenOn Mid-Atlantic, LLC Great River Energy Hawaiian Electric Industries, Inc.

Southern Star Central Corp. Southwest Gas Holdings, Inc. Southwest Power Pool, Inc. Spire Inc. STP Nuclear Operating Company

Talen Energy Corporation Tallgrass Energy Holdings Targa Resources Corp. Tennessee Valley Authority

The Board of Public Utilities of the City of Springfield, Missouri dba City Utilities of Springfield TransCanada Corporation Tri-State Generation and Transmission Association, Inc. UGI Corporation Vectren Corporation Vermont Electric Power Company, Inc. Vistra Energy Corp. WEC Energy Group, Inc. WGL Holdings, Inc. Williams Companies, Inc. (The)

WPX Energy, Inc. Xcel Energy Inc.

Northern California Power Agency Northwest Natural Gas Company

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