Royal Dutch Shell
Global oil and gas corp
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Member
EQT Corporation
Pittsburgh-based oil and gas driller
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Member
Talisman Energy Inc.
Oil and gas company
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Member
WPX Energy Inc.
Oil and natural gas exploration and production subsidiary of Williams Cos. Inc.
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Member
Chesapeake Energy
Natural gas producer
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Member
Southwestern Energy
Shale gas development company
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Member
Seneca Resources Corporation
E&P subsidiary of National Fuel Gas Company
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Member
XTO Energy Inc.
Crude Petroleum and Natural Gas; sold to Exxon in 2009
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Member
