Exhibit 21 - Subsidiaries of the Registrant
Name of Company Organization State of Type of Business
- --------------- ------------ Organization ----------------
KeySpan Corporation Corporation New York Holding Company
formerly d/b/a KeySpan Energy
KeySpan Exploration and Limited Delaware Natural Gas and Oil
Production, LLC Liability Exploration and
Company Development
KeySpan Gas East Corporation Corporation New York Gas Utility
d/b/a KeySpan Energy Delivery
Long Island
(formerly d/b/a Brooklyn Union of
Long Island)
KeySpan Corporate Services, LLC Limited New York Services
Liability
Company
KeySpan Energy Corporation Corporation New York Intermediate Holding
Company
The Brooklyn Union Gas Corporation New York Gas Utility
Company d/b/a KeySpan Energy
Delivery New York
(formerly d/b/a Brooklyn Union)
Corporation Delaware Holds General Partner
Interest in the Iroquois
North East Transmission Co., Gas Transmission
Inc. System, L.P.
Iroquois Gas Limited Delaware Natural Gas Pipeline
Transmission System, Partnership
L.P.
Boundary Gas, Inc. Corporation Delaware Gas Marketer
Alberta Northeast Gas, Ltd. Corporation Canada Gas Marketer
KeySpan Natural Fuels, LLC Limited Delaware Oil & Gas Wells
Liability
Company
Name of Company Organization State of Type of Business
- --------------- ------------ Organization ----------------
KeySpan North East Ventures, Corporation Delaware Non-Utility Holding
Inc. Company
Northeast Gas Markets LLC Limited Delaware Natural Gas
Liability Procurement and
Company Marketer
THEC Holdings Corp. Corporation Delaware Non-Utility Holding
Company
The Houston Exploration Corporation Delaware Natural Gas and Oil
Company Exploration
Seneca-Upshur Petroleum, Corporation Delaware Owns Oil and Gas
Inc. Properties
GEI Development Corp. Corporation Delaware Inactive
KeySpan Energy Development Corporation Delaware Non-Utility Holding
Corporation Company
GTM Energy, LLC Limited Delaware Develops Electric
Liability Generation Projects
Company
Honeoye Storage Corporation Corporation New York Natural Gas Storage
Facilities
Adrian Associates L.P. Partnership New York Natural Gas Storage
Services
KeySpan International Corporation Delaware Non-Utility Holding
Corporation Company
KeySpan C.I., LTD Company Cayman Non-Utility Holding
Islands Company
Name of Company Organization State of Type of Business
- --------------- ------------ Organization ----------------
KeySpan UK Limited Company United Non-Utility Holding
Kingdom Company
Premier Company Northern Natural Gas Pipeline
Transmission Ireland
Limited (formerly
Premier Transco
Limited)
Phoenix Natural Gas Company Northern Foreign Utility
Limited Ireland Company ("FUCO")
KeySpan C.I. II, LTD Company Cayman Non-Utility Holding
Islands Company
Grupo KeySpan, S. de Company Mexico Non-Utility Holding
R.L. de C.V. Company
FINSA Energeticos Company Mexico FUCO
S. de R.L. de C.V.
KeySpan Cross Bay, LLC Limited Delaware Owns a 25% Interest in
Liability Cross Bay Pipeline
Company Company, LLC
Cross Bay Pipeline Limited Delaware Natural Gas Pipeline (in
Company, LLC Liability development)
Company
KeySpan Islander East Limited Delaware 50% Interest in Islander
Pipeline, LLC Liability East Pipeline Company,
Company LLC
Islander East Pipeline Limited Delaware Natural Gad Pipeline (in
Company, LLC Liability development)
Company
KeySpan Midstream LLC Limited Delaware Non-Utility Holding
Liability Company
Company
Name of Company Organization State of Type of Business
- --------------- ------------ Organization ----------------
KeySpan CI Midstream Company Cayman Non-Utility Holding
Limited Islands Company
KeySpan Luxembourg Limited Luxembourg Non-Utility Holding
S.A.R.L. Liability Company
Company
Nicodama Beheer V Corporation Netherlands Non-Utility Holding
B.V. Company
KS Midstream Corporation Nova Scotia Non-Utility Holding
Finance Co. Company
KeySpan Energy Corporation Nova Scotia Non-Utility Holding
Development Co. Company
KeySpan Corporation Canada Owns a 19% interest in
Energy the Taylor Gas Liquids
Canada Ltd. Partnership
Alberta Corporation Canada Natural Gas
Laterals Transportation and
Company Ltd. Processing
The Taylor Partnership Canada Owns an Interest in Gas
Gas Liquids Extraction Plant
Partnership
KeySpan General Canada Natural Gas Processing
Energy Partnership and Gathering Systems
Canada
Partnership
Name of Company Organization State of Type of Business
- --------------- ------------ Organization ----------------
KeySpan Energy Canada Limited Company Canada Managing of Natural
Gas Processing and
Gathering Companies
KeySpan Utility Services LLC Limited New York Utility Services
Liability
Company
KeySpan Generation LLC Limited New York Electric Utility
Liability
Company
KeySpan Electric Services LLC Limited New York Operation and
Liability Maintenance Services
Company for electric facilities
KeySpan Energy Trading Services Limited New York Energy Broker
LLC Liability
Company
Marquez Development Corp. Corporation New York Uranium Mill and Mine
Which is Being
Dismantled
Island Energy Services Company, Corporation New York Inactive
Inc.
LILCO Energy Systems, Inc. Corporation New York Holds a 1% general
partner interest in
Iroquois Gas
Transmission System,
L.P.
KeySpan Ravenswood, Inc. Corporation New York Exempt Wholesale
Generator
KeySpan Ravenswood Services Corporation New York Operation and
Corp. Maintenance Services
KeySpan Services Inc. Corporation Delaware Non-Utility Holding
Company
Name of Company Organization State of Type of Business
- --------------- ------------ Organization ----------------
Binsky & Snyder, Inc. Corporation New Jersey Installs HVAC Systems
Binsky & Snyder Service, Inc. Corporation New Jersey Services and Maintains
HVAC Systems
WDF, Inc. Corporation New York Mechanical Contracting
Services
Roy Kay, Inc. Corporation New Jersey Mechanical and General
Contracting Services
Roy Kay Electrical Company Corporation New York Electrical Contracting
Services
Roy Kay Mechanical, Inc. Corporation New Jersey Installation and
Renovation of Sprinkler
and Fire Suppression
Systems
Active Conditioning Corp. Corporation New Jersey Installation and
Maintenance of HVAC
Systems
KeySpan Communications Corp. Corporation New York Owns a Fiber Optic
Network
KeySpan Energy Solutions, LLC Limited New York Service and
d/b/a KeySpan Home Energy Liability Maintenance of HVAC
Services and d/b/a KeySpan Company Systems and Gas
Business Solutions Appliances
KeySpan Plumbing Corporation New York Plumbing and
Solutions, Inc. d/b/a KeySpan Maintenance Services
Home Energy Services and
d/b/a KeySpan Business
Solutions
Name of Company Organization State of Type of Business
- --------------- ------------ Organization ----------------
KeySpan Plumbing and Corporation New York Plumbing and
Heating Services, Inc. d/b/a Maintenance Services
KeySpan Home Energy
Services and d/b/a KeySpan
Business Solutions
Fritze KeySpan, LLC Limited Delaware Designs, Builds and
Liability Installs HVAC Systems
Company
KeySpan Energy Management, Corporation Delaware Non-Utility Holding
Inc. Company and Installs
and Constructs HVAC
Systems
KeySpan Engineering Corporation New York Reviews Power Supply
Associates, Inc. Needs Customers and
Designs Efficient Power
Systems
R.D. Mortman, LLC Limited New York Installs and Services
Liability HVAC Systems
Company
KeySpan Energy Services, Inc. Corporation Delaware Energy Marketer
d/b/a KeySpan Home Energy
Services and d/b/a KeySpan
Business Solutions
Delta KeySpan, Inc. Corporation Delaware Designs and Installs
HVAC Systems
Paulus Sokolowski and Sartor, Corporation New Jersey Engineering and
Inc. Consulting Services
Fourth Avenue Enterprise Piping Corporation New York Maintenance and
Corp. Installation of HVAC
Systems
KeySpan Energy Supply LLC Limited Delaware Energy Broker
Liability
Company
Name of Company Organization State of Type of Business
- --------------- ------------ Organization ----------------
KeySpan Technologies Inc. Corporation New York Sells Equipment that
Promotes New
Technologies
Honeoye Storage Corporation Corporation New York Natural Gas Storage
KeySpan MHK, Inc. Corporation Delaware Holds a 25% Equity
Interest in
MyHomeKey.com, Inc.
MyHomeKey.com, Inc. Corporation Delaware Exempt
Telecommunications
Company
KeySpan Engineering and Survey, Corporation New York Engineering and
Inc. Surveying Company
Eastern Enterprises Voluntary Massachusetts Intermediate Holding
Association Company
Boston Gas Company d/b/a Corporation Massachusetts Gas Utility
KeySpan Energy Delivery New
England
Colonial Gas Company d/b/a Corporation Massachusetts Gas Utility
KeySpan Energy Delivery New
England
Transgas, Inc. Corporation Massachusetts Over the Road
Transportation of
Liquefied Natural Gas
and Propane
Essex Gas Company d/b/a Corporation Massachusetts Gas Utility
KeySpan Energy Delivery New
England
AMR Data Corporation Corporation Massachusetts Meter Reading Services
Name of Company Organization State of Type of Business
- --------------- ------------ Organization ----------------
Eastern Associated Securities Corporation Massachusetts Holds Investment
Corp. Securities
Eastern Energy Systems Corp. Corporation Delaware Inactive
Eastern Rivermoor Company, Corporation Massachusetts Real Estate Company
Inc.
Eastern Urban Services, Inc. Corporation Delaware Holds Passive Real
Estate Interests
Midland Enterprises, Inc. Corporation Delaware Non-Utility Holding
Company
Capital Marine Supply, Inc. Corporation Louisiana River Barge
Transportation Services
and Related Support
Activities
Chotin Transportation, Inc. Corporation Louisiana River Barge
Transportation Services
and Related Support
Activities
Eastern Associated Terminals Corporation Delaware River Barge
Company Transportation Services
and Related Support
Activities
Federal Barge Lines, Inc. Corporation Delaware River Barge
Transportation Services
and Related Support
Activities
River Fleets, Inc. Corporation Louisiana River Barge
Transportation Services
and Related Support
Activities
Hartley Marine Corp. Corporation Delaware River Barge
Transportation Services
and Related Support
Activities
Name of Company Organization State of Type of Business
- --------------- ------------ Organization ----------------
Minnesota Harbor Service, Corporation Minnesota River Barge
Inc. Transportation Services
and Related Support
Activities
The Ohio River Company Corporation West Virginia River Barge
Transportation Services
and Related Support
Activities
The Ohio River Company Corporation Pennsylvania River Barge
Traffic Division, Inc. Transportation Services
and Related Support
Activities
The Ohio River Terminals Corporation Delaware River Barge
Company Transportation Services
and Related Support
Activities
Orgulf Transport Co. Corporation Delaware River Barge
Transportation Services
and Related Support
Activities
Orsouth Transport Co. Corporation Delaware River Barge
Transportation Services
and Related Support
Activities
Port Allen Marine Service, Corporation Louisiana Inactive
Inc.
Red Circle Transport Co. Corporation Delaware River Barge
Transportation Services
and Related Support
Activities
West Virginia Terminals, Inc. Corporation West Virginia River Barge
Transportation Services
and Related Support
Activities
Mystic Steamship Corporation Corporation Delaware Inactive
Name of Company Organization State of Type of Business
- --------------- ------------ Organization ----------------
PCC Land Company, Inc. Corporation Texas Real Estate
Philadelphia Coke Co., Inc. Corporation Delaware Inactive
KeySpan Home Energy Services Corporation Massachusetts HVAC Services
(New England), Inc. f/n/a
ServicEdge Partners, Inc.
Western Associated Energy Corporation Delaware Inactive
Corp.
EnergyNorth, Inc. Corporation New Intermediate Holding
Hampshire Company
EnergyNorth Natural Gas, Corporation New Gas Utility
Inc. d/b/a KeySpan Energy Hampshire
Delivery New England
Broken Bridge Corporation Corporation New Holds Undeveloped
Hampshire Real Estate
EnergyNorth Realty, Inc. Corporation New Owns and Leases a
Hampshire Buildings to Associate
Companies
ENI Mechanicals, Inc. Corporation New Non-Utility Holding
Hampshire Company
Northern Peabody, Inc. Corporation New Mechanical Contractor
Hampshire (HVAC)
Granite State Plumbing Corporation New Mechanical Contractor
and Heating, Inc. Hampshire (HVAC)