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    Biopropulsion, LLC

    Biopropulsion LLC has developed two revolutionary technologies, the “Clean Air N...

    Biopropulsion LLC has developed two revolutiona...

    Approach Resources Inc.

    Approach Resources Inc.

    Approach Resources Inc. (NASDAQ: AREX) is an independent oil and gas company headq...

    Approach Resources Inc. (NASDAQ: AREX) is an in...

    Galp Energia, SA

    Galp Energia, SA

    Galp is a publicly held, Portuguese-based energy company, with an international pr...

    Galp is a publicly held, Portuguese-based energ...

    Extraction Oil & Gas, Inc.

    Extraction Oil & Gas, Inc.

    Denver-based Extraction Oil & Gas is a domestic energy company focusing on the exp...

    Denver-based Extraction Oil & Gas is a domestic...

    Royal Dutch Shell Plc

    Royal Dutch Shell Plc

    Royal Dutch Shell PLC, through subsidiaries, explores, produces, and refines petro...

    Royal Dutch Shell PLC, through subsidiaries, ex...

    ENI S.p.A.

    ENI S.p.A.

    We are an energy company engaged in the exploration, production, refining and sale...

    We are an energy company engaged in the explora...

    PDC Energy, Inc.

    PDC Energy, Inc.

    Founded in 1969, PDC Energy is an independent exploration and production company f...

    Founded in 1969, PDC Energy is an independent e...

    Penn Virginia Corporation

    Penn Virginia Corporation

    Penn Virginia Corporation is an independent oil and gas company engaged in the exp...

    Penn Virginia Corporation is an independent oil...

    Lonestar Resources US Inc.

    Lonestar Resources US Inc.

    Lonestar is an independent oil and natural gas company, focused on the development...

    Lonestar is an independent oil and natural gas ...