Parent company
|
Operating company
|
Operating states
|
AES Corporation
(AES)
|
AES Indiana
, formerly Indianapolis Power & Light
|
IN
|
Dayton Power and Light
|
OH
|
Allete (ALE)
|
Minnesota Power
|
MN
|
Superior Water, Light and Power
|
WI
|
Alliant Energy
(LNT)
|
Interstate Power and Light
|
IA
|
Wisconsin Power and Light
|
WI
|
Ameren
(AEE)
|
Ameren Illinois
|
IL
|
Ameren Missouri
|
MO
|
American Electric Power
(AEP)
|
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 (AVA)
|
Avista Utilities
|
ID, WA
|
Black Hills Corporation
(BKH)
|
Black Hills Energy
|
CO, SD, IA, KS, NE, WY
|
CenterPoint Energy
(CNP)
|
CenterPoint Energy
|
TX
|
Fortis Inc.
(FTS)
|
Central Hudson Gas & Electric
|
NY
|
Cleco Holdings
|
Cleco
|
LA
|
Consolidated Edison
(ED)
|
Consolidated Edison
|
NY
|
Orange and Rockland Utilities
|
NY, NJ, PA
|
CMS Energy
(CMS)
|
Consumers Energy
|
MI
|
Dominion Energy
|
Dominion Virginia Power
|
VA
|
Dominion North Carolina Power
|
NC
|
DQE
|
Duquesne Light
|
PA
|
DTE Energy Electric Company
(DTE)
|
Detroit Edison
|
MI
|
Duke Energy
(DUK)
|
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
(EIX)
|
Southern California Edison
|
CA
|
Emera
|
Bangor Hydro Electric
|
ME
|
Maine Public Service
|
ME
|
Energir
|
Central Vermont Public Service
|
VT
|
Green Mountain Power
|
VT
|
Entergy
(ETR)
|
Entergy Arkansas
|
AR
|
Entergy Louisiana
|
LA
|
Entergy Gulf States
|
LA
|
Entergy Mississippi
|
MS
|
Entergy New Orleans
|
LA
|
Entergy Texas
|
TX
|
Evergy
(EVRG)
|
Evergy
|
MO, KS
|
Eversource Energy
(ES)
|
Connecticut Light & Power
|
CT
|
Public Service New Hampshire
|
NH
|
Western Massachusetts Electric
|
MA
|
Exelon
(EXC)
|
Commonwealth Edison
|
IL
|
Philadelphia Electric
|
PA
|
Baltimore Gas & Electric
|
MD
|
Potomac Electric Power
|
DC, MD
|
Delmarva Power
|
DE, MD
|
Atlantic City Electric
|
NJ
|
FirstEnergy
(FE)
|
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
|
Hawaiian Electric Industries
(HE)
|
Hawaii Electric Company
|
HI
|
Hawaii Electric Light Company
|
HI
|
Maui Electric Company
|
HI
|
Iberdrola
(IBE.MC)
|
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
(MDU)
|
Montana-Dakota Utilities
|
MT, ND, SD, WY
|
MGE Energy
(MGEE)
|
Madison Gas and Electric
|
WI
|
Berkshire Hathaway Energy
|
MidAmerican Energy Company
|
IA, IL, SD, NE
|
Pacificorp
--Pacific Power
|
OR, CA, WA
|
Pacificorp--Rocky Mountain Power
|
UT, WY, ID
|
NV Energy
|
NV, CA
|
National Grid plc
(NGG)
|
New England Power
|
MA, NH, VT, CT, ME
|
Massachusetts Electric
|
MA
|
Nantucket Electric
|
MA
|
Granite State Electric
|
NH
|
Niagara Mohawk Power
|
NY
|
Long Island Lighting
|
NY
|
NextEra Energy
(NEE)
|
Florida Power & Light
|
FL
|
Gulf Power
|
FL
|
NiSource
(NI)
|
Northern Indiana Public Service Company
|
IN
|
NorthWestern Corporation
(NWE)
|
NorthWestern Energy
|
SD, MT, NE
|
NRG Energy
(NRG)
|
Reliant Energy
|
TX
|
NSTAR
(NSARO)
|
Boston Edison
|
MA
|
Cambridge Electric Light
|
MA
|
Commonwealth Electric
|
MA
|
OGE Energy Corporation (OGE)
|
Oklahoma Gas & Electric
|
OK, AR
|
Otter Tail Corporation
(OTTR)
|
Otter Tail Power
|
ND, MN, SD
|
PG&E Corporation (PCG)
|
Pacific Gas & Electric Company
|
CA
|
Pinnacle West Capital (PNW)
|
Arizona Public Service
|
AZ
|
PNM Resources
(PNM)
|
Public Service Company of New Mexico
|
NM
|
Texas-New Mexico Power
|
TX
|
Portland General Electric
(POR)
|
Portland General Electric
|
OR
|
PPL
Corporation (PPL)
|
PPL Electric Utilities
|
PA
|
Louisville Gas & Electric
|
KY
|
Kentucky Utilities
|
KY
|
Rhode Island Energy
|
RI
|
Public Service Enterprise Group
(PEG)
|
Public Service Electric & Gas
|
NJ
|
Puget Energy
|
Puget Sound Energy
|
WA
|
SCANA
(SCG)
|
South Carolina Electric & Gas Company
|
SC
|
Sempra Energy
(SRE)
|
San Diego Gas & Electric
|
CA
|
Southern Company
(SO)
|
Alabama Power
|
AL
|
Georgia Power
|
GA
|
Mississippi Power
|
MS
|
TECO Energy
|
Tampa Electric
|
FL
|
UGI Corporation
(UGI)
|
United Electric Company
|
PA
|
UIL Holdings Corporation
|
The United Illuminating Company
|
CT
|
UniSource Energy
|
Tucson Electric Power
|
AZ
|
UNS Electric
|
AZ
|
Unitil (UTL)
|
Unitil Energy
|
MA, NH
|
Fitchburg Gas & Electric
|
MA
|
Vectren
(VVC)
|
Southern Indiana Gas and Electric
|
IN
|
Wisconsin Energy Corporation
|
We Energies
|
WI
|
Xcel Energy
(XEL)
|
Northern States Power Company
|
MN, ND, SD, WI
|
Public Service Colorado
|
CO
|
Southwestern Public Service
|
NM, TX
|