Ameren Corporation
|
IL
|
Ameren Illinois
|
Both
|
MO
|
Ameren Missouri
|
Both
|
American Electric Power (AEP)
|
AR
|
Southwestern Electric Power Co
|
Electric
|
IN
|
Indiana Michigan Power Co
|
Electric
|
KY
|
Kentucky Power
|
Electric
|
LA
|
Southwestern Electric Power Co
|
Electric
|
MI
|
Indiana Michigan Power Co
|
Electric
|
OH
|
AEP Ohio
|
Electric
|
OK
|
Public Service Co of Oklahoma
|
Electric
|
TN
|
Appalachian Power Co
|
Electric
|
TX
|
Southwestern Electric Power Co
|
Electric
|
AEP Texas
|
Electric
|
VA
|
Appalachian Power Co
|
Electric
|
WV
|
Appalachian Power Co
|
Electric
|
Arkansas Oklahoma Gas Corporation
|
AR
|
Arkansas Oklahoma Gas Corporation
|
Gas
|
OK
|
Arkansas Oklahoma Gas Corporation
|
Gas
|
Atmos Energy
|
CO
|
Atmos Energy Colorado - Kansas Division
|
Gas
|
GA
|
Atmos Energy Kentucky/Mid-States Division
|
Gas
|
IL
|
Atmos Energy Kentucky/Mid-States Division
|
Gas
|
KS
|
Atmos Energy Colorado - Kansas Division
|
Gas
|
KY
|
Atmos Energy Kentucky/Mid-States Division
|
Gas
|
LA
|
Atmos Energy Louisiana Division
|
Gas
|
MS
|
Atmos Energy Mississippi Division
|
Gas
|
TN
|
Atmos Energy Kentucky/Mid-States Division
|
Gas
|
TX
|
Atmos Energy Mid-Texas Division
|
Gas
|
Atmos Energy West Texas Division
|
Gas
|
VA
|
Atmos Energy Kentucky/Mid-States Division
|
Gas
|
Avista Utilities
|
ID
|
Avista Utilities
|
Both
|
MT
|
Avista Utilities
|
Both
|
OR
|
Avista Utilities
|
Gas
|
WA
|
Avista Utilities
|
Both
|
Black Hills Corporation
Black Hills Corporation, continued
|
CO
|
Black Hills Energy
|
Both
|
IA
|
Black Hills Energy
|
Gas
|
KS
|
Black Hills Energy
|
Gas
|
MT
|
Black Hills Energy
|
Gas
|
NE
|
Black Hills Power
|
Electric
|
SD
|
Black Hills Power
|
Electric
|
WY
|
Black Hills Power
|
Electric
|
Cheyenne Light
|
Both
|
Centerpoint Energy
|
AR
|
Centerpoint Energy Arkansas
|
Gas
|
LA
|
Centerpoint Energy Louisiana
|
Gas
|
MN
|
Centerpoint Energy Minnesota
|
Gas
|
MS
|
Centerpoint Energy Mississippi
|
Gas
|
OK
|
Centerpoint Energy Oklahoma
|
Gas
|
TX
|
Centerpoint Energy Houston Electric, LLC
|
Electric
|
Centerpoint Energy Houston
|
Gas
|
Centerpoint Energy Texas
|
Gas
|
Dominion
|
NC
|
Dominion North Carolina Power
|
Electric
|
OH
|
Dominion East Ohio
|
Gas
|
VA
|
Dominion Virginia Power
|
Electric
|
WV
|
Dominion Hope
|
Gas
|
Duke Energy
|
FL
|
Duke Energy
|
Electric
|
IN
|
Duke Energy
|
Electric
|
KY
|
Duke Energy
|
Both
|
NC
|
Duke Energy Progress
|
Electric
|
Duke Energy
|
Electric
|
OH
|
Duke Energy
|
Both
|
SC
|
Duke Energy Progress
|
Electric
|
Duke Energy
|
Electric
|
El Paso Electric
|
NM
|
El Paso Electric
|
Electric
|
TX
|
El Paso Electric
|
Electric
|
Entergy
|
AR
|
Entergy Arkansas Inc.
|
Electric
|
LA
|
Entergy Louisiana Inc.
|
Electric
|
Entergy New Orleans
|
Electric
|
MS
|
Entergy Mississippi Inc.
|
Electric
|
TX
|
Entergy Texas Inc.
|
Electric
|
First Energy
|
MD
|
Potomac Edison
|
Electric
|
OH
|
Ohio Edison
|
Electric
|
The Illuminating Company
|
Electric
|
Toledo Edison
|
Electric
|
PA
|
Met-Ed
|
Electric
|
PenElectric
|
Electric
|
Penn Power
|
Electric
|
West Penn Power
|
Electric
|
WV
|
Mon Power
|
Electric
|
Potomac Edison
|
Electric
|
Iberdrola USA
|
ME
|
Maine Natural Gas Corp.
|
Gas
|
Central Maine Power Company
|
Gas
|
NH
|
New Hampshire Gas Corp.
|
Gas
|
NY
|
New York State Electric & Gas Corp.
|
Both
|
Rochester Gas & Electric Corp.
|
Both
|
Idaho Power
|
ID
|
Idaho Power
|
Electric
|
OR
|
Idaho Power
|
Electric
|
Integrys
|
IL
|
North Shore Gas
|
Gas
|
Peoples Gas
|
Gas
|
MI
|
Michigan Gas Utilities
|
Gas
|
MN
|
Minnesota Energy Resources
|
Gas
|
WI
|
Wisconsin Public Service Corp
|
Both
|
Kansas City Power & Light
|
KS
|
Kansas City Power & Light Co
|
Electric
|
MO
|
Kansas City Power & Light Co
|
Electric
|
KCP&L Greater Missouri Operations
|
Electric
|
Laclede Gas Company
|
AL
|
Alabama Gas Corporation
|
Gas
|
MO
|
Laclede Gas Company
|
Gas
|
Liberty Utilities
|
CA
|
Liberty Utilities
|
Electric
|
GA
|
Liberty Utilities
|
Gas
|
IA
|
Liberty Utilities
|
Gas
|
IL
|
Liberty Utilities
|
Gas
|
MA
|
Liberty Utilities
|
Gas
|
MO
|
Liberty Utilities
|
Gas
|
NH
|
Liberty Utilities
|
both
|
MDU Resources Group, Inc.
|
ID
|
Intermountain Gas Company
|
Gas
|
MN
|
Great Plains Natural Gas Company
|
Gas
|
MT
|
Montana-Dakota Utilities Co
|
Electric
|
ND
|
Montana-Dakota Utilities Co
|
Electric
|
Great Plains Natural Gas Company
|
Gas
|
OR
|
Cascade Natural Gas Corporation
|
Gas
|
SD
|
Montana-Dakota Utilities Co
|
Electric
|
WA
|
Cascade Natural Gas Corporation
|
Gas
|
WY
|
Montana-Dakota Utilities Co
|
Electric
|
National Grid
|
MA
|
National Grid
|
Both
|
NY
|
National Grid
|
Both
|
RI
|
National Grid
|
Both
|
NiSource
|
IN
|
Northern Indiana Public Service Co
|
Both
|
KY
|
Columbia Gas of Kentucky
|
Gas
|
MA
|
Columbia Gas of Massachusetts
|
Gas
|
MD
|
Columbia Gas of Maryland
|
Gas
|
OH
|
Columbia Gas of Ohio
|
Gas
|
PA
|
Columbia Gas of Pennsylvania
|
Gas
|
VA
|
Columbia Gas of Virginia
|
Gas
|
Northeast Utilities
|
CT
|
Connecticut Light & Power
|
Electric
|
Yankee Gas
|
Gas
|
MA
|
NSTAR Electric and Gas
|
both
|
Western Massachusetts Electric Company
|
Electric
|
NH
|
Public Service of New Hampshire
|
Electric
|
Northwest Natural Gas
|
OR
|
Northwest Natural Gas
|
Gas
|
WA
|
Northwest Natural Gas
|
Gas
|
Northwestern Energy
|
MT
|
Northwestern Energy
|
Both
|
NE
|
Northwestern Energy
|
Gas
|
SD
|
Northwestern Energy
|
Both
|
OGE Energy Corp
|
AR
|
Oklahoma Gas & Electric Co
|
Gas
|
OK
|
Oklahoma Gas & Electric Co
|
Gas
|
Otter Tail Corp
|
MN
|
Otter Tail Power Company
|
Electric
|
ND
|
Otter Tail Power Company
|
Electric
|
SD
|
Otter Tail Power Company
|
Electric
|
PacifiCorp
|
CA
|
Pacific Power
|
Electric
|
ID
|
Pacific Power
|
Electric
|
Rocky Mountain Power
|
Electric
|
MT
|
Pacific Power
|
Electric
|
OR
|
Pacific Power
|
Electric
|
UT
|
Rocky Mountain Power
|
Electric
|
WA
|
Pacific Power
|
Electric
|
WY
|
Pacific Power
|
Electric
|
Pepco Holdings, Inc.
|
DC
|
Potomac Electric Power Co
|
Electric
|
DE
|
Delmarva Power
|
Both
|
MD
|
Potomac Electric Power Co
|
Electric
|
Delmarva Power
|
Electric
|
NJ
|
Atlantic City Electric
|
Electric
|
Piedmont Natural Gas
|
NC
|
Piedmont Natural Gas
|
Gas
|
SC
|
Piedmont Natural Gas
|
Gas
|
TN
|
Piedmont Natural Gas
|
Gas
|
PSE&G
|
NJ
|
PSE&G
|
Both
|
NY
|
Long Island Power Authority
|
Electric
|
Questar Gas Company
|
ID
|
Questar Gas Company
|
Gas
|
UT
|
Questar Gas Company
|
Gas
|
WY
|
Questar Gas Company
|
Gas
|
Sempra Energy
|
AL
|
Mobile Gas
|
Gas
|
CA
|
San Diego Gas & Electric
|
Both
|
Southern California Gas Company
|
Gas
|
MS
|
Willmut Gas
|
Gas
|
Source Gas
|
AR
|
Source Gas Arkansas
|
Gas
|
CO
|
Source Gas
|
Gas
|
NE
|
Source Gas
|
Gas
|
WY
|
Source Gas
|
Gas
|
Southern Company
|
AL
|
Alabama Power Company
|
Electric
|
FL
|
Gulf Power Company
|
Electric
|
GA
|
Georgia Power Company
|
Electric
|
MS
|
Mississippi Power Company
|
Electric
|
Southwest Gas Corporation
|
AR
|
Southwest Gas Corporation
|
Gas
|
CA
|
Southwest Gas Corporation
|
Gas
|
NV
|
Southwest Gas Corporation
|
Gas
|
UIL Holdings Corporation
|
CT
|
United Illuminating Company
|
Electric
|
Southern Connecticut Gas Company
|
Gas
|
Connecticut Natural Gas Corporation
|
Gas
|
MA
|
Berkshire Gas Company
|
Gas
|
Washington Gas Light Company
|
DC
|
Washington Gas Light Company
|
Gas
|
MD
|
Washington Gas Light Company
|
Gas
|
VA
|
Washington Gas Light Company
|
Gas
|
Xcel Energy
|
CO
|
Xcel Energy
|
Both
|
MI
|
Xcel Energy
|
Both
|
MN
|
Xcel Energy
|
Both
|
ND
|
Xcel Energy
|
Electric
|
NM
|
Xcel Energy
|
Electric
|
SD
|
Xcel Energy
|
Electric
|
TX
|
Xcel Energy
|
Electric
|
WI
|
Xcel Energy
|
Both
|
