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Here is a convenient list of the Midwest Independent Transmission System Operator's members,
with a link to each member's Home page.

Current Listing of Midwest ISO Members by Sector
Transmission Owners
Coordination Companies
Independent Transmission Companies
Non-Transmission Owning Members
Transmission Facilities Under the Midwest ISO's Functional Control

 

Transmission Owners
 
  • Allete, Inc. (for its operating division Minnesota Power and its wholly owned
       subsidiary Superior Water, Light and Power Company)
  • AmerenCILCO
  • AmerenIP
  • AmerenUE and AmerenCIPS
  • American Transmission Company, LLC
  • American Transmission Systems, Inc.
  • Aquila, Inc.
  • Central Minnesota Municipal Power Agency
  • City of Columbia, MO
  • City Water, Light & Power (Springfield, Illinois)
  • Duke Energy Shared Services, Inc. d/b/a:
      • Duke Energy Ohio, Inc.
      • PSI Energy, Inc.
      • The Union Light, Heat and Power Company
  • Duquesne Light Company
  • Great River Energy
  • Hoosier Energy Rural Electric Cooperative, Inc.
  • Indiana Municipal Power Agency
  • Indianapolis Power & Light Company
  • Michigan Electric Transmission Company, LLC
  • Michigan Public Power Agency
  • Michigan South Central Power Agency
  • Montana-Dakota Utilities Co.
  • Northern Indiana Public Service Company
  • Northwestern Wisconsin Electric Company
  • Otter Tail Power Company
  • Southern Illinois Power Cooperative
  • Southern Minnesota Municipal Power Agency (SMMPA)
  • Vectren Energy for Southern Indiana Gas & Electric Company
  • Wabash Valley Power Association, Inc.
  • Wolverine Power Supply Cooperative, Inc.
  • Xcel Energy, Inc. for:
      • Northern States Power Company (Minnesota) and
      • Northern States Power Company (Wisconsin)

    Coordination Companies
     
  • Manitoba Hydro
  • Independent Transmission Companies
     
  • International Transmission Company
  • ITC Midwest LLC
  • Non-Transmission Owning Members
     
  • Allegheny Energy Supply Company, LLC
  • Alliant Energy Corporate Services, Inc.
  • Ameren Energy Marketing
  • American Electric Power Company
  • American Municipal Power - Ohio, Inc.
  • Arcelor Mittal USA
  • Barclays Bank PLC
  • Basin Electric Power Cooperative
  • Bear Energy, LP
  • Benton County Wind Farm, LLC
  • BP Energy Company
  • Calpine Energy Services, L.P.
  • Cargill Power Markets, LLC
  • Citigroup Energy Inc.
  • Citadel Energy Products LLC
  • Cleveland Public Power, Dept. of Public Utilities
  • Clipper Windpower Development Company
  • Coalition of Midwest Transmission Customers
  • Commonwealth Edison Company
  • Conectiv Energy Supply, Inc.
  • Constellation Energy Commodities Group, Inc.
  • Consumers Energy Company
  • The Dayton Power and Light Company
  • Detroit Edison Company
  • DC Energy Midwest, LLC
  • Dominion Energy Marketing, Inc.
  • Duke Energy North America, LLC
  • Dynegy Power Marketing, Inc.
  • Edison Mission Marketing & Trading, Inc.
  • Emera Energy Services, Inc.
  • Entergy Nuclear Power Marketing, LLC
  • E.ON Climate & Renewables North America Inc. (f/k/a Airtricity, Inc.)
  • E.ON U.S. LLC (for Louisville Gas and Electric Company and Kentucky Utilities Company)
  • EPIC Merchant Energy Midwest, L.P.
  • Eurus Energy America LLC
  • Exelon Generation Company, LLC
  • FirstEnergy Solutions Corp.
  • FPL Energy, LLC
  • Gexa Energy Ohio, LLC
  • Granite City Steel, Division of the U.S. Steel Corporation; International Steel Group; and Caterpillar, Inc.
  • Heartland Consumers Power District
  • Hess Corporation
  • Horizon Wind Energy, LLC
  • H.Q. Energy Services (U.S.) Inc.
  • Illinois Municipal Electric Agency
  • Integrys Energy Group
  • IPA Trading, LLC
  • J. Aron & Company
  • JPTC, LLC
  • Koch Supply & Trading, LP
  • Lehman Brothers Commodity Services Inc.
  • Lincoln Electric System
  • Linde Energy Services, Inc.
  • Madison Gas and Electric
  • MidAmerican Energy Company
  • Midwest Industrial Customers
  • Mirant Americas Energy Marketing, LP
  • Missouri River Energy Services
  • Morgan Stanley Capital Group Inc.
  • NOPEC, Inc.
  • North America Power Partners, LLC
  • NRG Power Marketing, Inc.
  • Ontario Power Generation, Inc.
  • Peabody Energy Corporation
  • Pepco Energy Services, Inc.
  • PPL EnergyPlus, LLC
  • PPM Energy, Inc.
  • Prairie State Generating Company, LLC
  • Prairie State Energy Campus
  • PSEG Energy Resources & Trade LLC
  • Quest Energy LLC
  • Reliant Energy, Inc.
  • S.A.C. Energy Investments, L.P.
  • Saracen Energy LP
  • Sempra Energy Trading, LLC
  • SESCO Enterprises, LLC
  • Shell Energy North America (US), L.P.
  • Soyland Power Cooperative, Inc.
  • Strategic Energy, L.L.C
  • Tenaska Power Services Co.
  • The Energy Authority Inc.
  • Thornwood Management Company, LLC
  • Trans-Elect Development Company
  • UBS AG, London Branch
  • Westar Energy, Inc.
  • Western Area Power Administration - UGP Marketing
  • Williams Power Company, Inc.
  • Wisconsin Electric Power Company
  • Wisconsin Public Power Inc.
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