Investor-owned utility

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An investor-owned utility or IOU is a business organization, providing a product or service regarded as a utility (often termed a public utility regardless of ownership), and managed as private enterprise rather than a function of government or a utility cooperative. Such businesses can range from a family whose residential property includes a well whose flow in excess of the family's own needs produces a secondary income, to international communications conglomerates, but political and infrastructure considerations in some countries makes the private sector of the electric-power production and distribution industry the most often discussed investor-owned utilities there.


List of Investor Owned Electric Power Delivery Utilities with Assets in the United States of America

Parent Company Operating Company Operating States
AES Corporation Indianapolis Power & Light IN
Dayton Power and Light OH
Allete Minnesota Power MN
Superior Water, Light and Power WI
Alliant Energy Interstate Power and Light IA, MN
Wisconsin Power and Light WI
Ameren Ameren Illinois IL
Ameren Missouri MO
American Electric Power AEP Ohio OH, WV
AEP Texas TX
Appalachian Power TN, VA, WV
Indiana Michigan Power IN, MI
Kentucky Power KY
Public Service Company of Oklahoma OK
Southwestern Electric Power TX
American Transmission Company American Transmission Company WI, MI
Avista Corporation Avista Utilities ID, WA
Black Hills Corporation Black Hills Power CO, SD, IA, KS, NE
Cheyenne Light, Fuel & Power WY
CenterPoint Energy CenterPoint Energy TX
Fortis Inc. Central Hudson Gas & Electric NY
CLECO Cleco LA
Consolidated Edison Consolidated Edison NY
Orange and Rockland Utilities NY, NJ, PA
CMS Energy Consumers Energy MI
Dominion Resources Dominion Virginia Power VA
Dominion North Carolina Power NC
DQE Duquesne Light PA
DTE Energy Electric Company Detroit Edison MI
Duke Energy Duke Energy Carolinas NC, SC
Duke Energy Progress NC, SC
Duke Energy Indiana IN
Duke Energy Ohio OH
Duke Energy Kentucky KY
Duke Energy Florida FL
Edison International Southern California Edison CA
El Paso Electric El Paso Electric TX, NM
Emera Bangor Hydro Electric ME
Maine Public Service ME
Energy Future Holdings Oncor Electric Delivery TX
Entergy Entergy Arkansas AR
Entergy Louisiana LA
Entergy Gulf States LA
Entergy Mississippi MS
Entergy New Orleans LA
Entergy Texas TX
Exelon Commonwealth Edison IL
Philadelphia Electric PA
Baltimore Gas & Electric MD
FirstEnergy Ohio Edison OH
Cleveland Electric Illuminating OH
Toledo Edison OH
Pennsylvania Power PA
Penelec PA
Met-Ed PA
Jersey Central P&L NJ
Allegheny Energy PA
Monongahela Power WV
Potomac Edison MD, WV, VA
West Penn PA
Gaz Metro Central Vermont Public Service VT
Green Mountain Power VT
Great Plains Energy Kansas City Power and Light MO, KS
Hawaiian Electric Industries Hawaii Electric Company HI
Hawaii Electric Light Company HI
Maui Electric Company HI
Iberdrola Rochester Gas & Electric NY
New York State Electric & Gas NY
Central Maine Power ME
Integrys Energy Group Wisconsin Public Service Corporation WI
Upper Peninsula Power Company MI
ITC Holdings ITC Transmission MI
Michigan Electric Transmission Company MI
ITC Midwest IA, MN, IL, MO
ITC Great Plains OK, KS
MDU Resources Montana-Dakota Utilities MT, ND, SD, WY
MGE Energy Madison Gas and Electric WI
Berkshire Hathaway Energy MidAmerican Energy Company IL, SD, NE
Pacificorp--Pacific Power OR, CA, WA
Pacificorp--Rocky Mountain Power UT, WY, ID
NV Energy NV, CA
National Grid plc New England Power MA, NH, RI, VT, CT, ME
Massachusetts Electric MA
Nantucket Electric MA
Narragansett Electric MA
Granite State Electric NH
Niagara Mohawk Power NY
Long Island Lighting NY
NextEra Energy Florida Power & Light FL
NiSource Northern Indiana Public Service Company IN
Northeast Utilities Connecticut Light & Power CT
Public Service New Hampshire NH
Western Massachusetts Electric MA
NorthWestern Corporation NorthWestern Energy SD, MT, NE
NRG Energy Reliant Energy TX
NSTAR Boston Edison MA
Cambridge Electric Light MA
Commonwealth Electric MA
OGE Energy Corporation Oklahoma Gas & Electric OK, AR
Otter Tail Corporation Otter Tail Power ND, MN, SD
PG&E Corporation Pacific Gas & Electric Company CA
Pepco Holdings Potomac Electric Power DC, MD
Delmarva Power DE
Atlantic City Electric NJ
Pinnacle West Capital Arizona Public Service AZ
PNM Resources Public Service Company of New Mexico NM
Texas-New Mexico Power TX
Portland General Electric Portland General Electric OR
PPL PPL PA, MT
Louisville Gas & Electric KY
Kentucky Utilities KY
Public Service Enterprise Group Public Service Electric & Gas NJ
Puget Energy Puget Sound Energy WA
SCANA South Carolina Electric & Gas Company SC
Sempra Energy San Diego Gas & Electric CA
TECO Energy Tampa Electric FL
UGI Corporation United Electric Company PA
UIL Holdings Corporation The United Illuminating Company CT
UniSource Energy Tucson Electric Power AZ
UNS Electric AZ
Unitil Unitil Energy MA, NH
Fitchburg Gas & Electric MA
Vectren Southern Indiana Gas and Electric IN
Westar Energy Westar Energy KS
Wisconsin Energy Corporation We Energies WI
Xcel Energy Northern States Power Company MN, ND, SD, WI
Public Service Colorado CO
Southwestern Public Service NM, TX

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