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Jurisdiction of

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Incorporation or

Name of Subsidiary

Organization

Evolution Royalties, Inc.

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Delaware

Evolution Petroleum West, Inc.

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Delaware

NGS Sub Corp.

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Delaware

NGS Technologies, Inc.

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Delaware

Evolution Operating Co., Inc.

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Texas

Evolution Petroleum OK, Inc.

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Texas

Tertiaire Resources Company

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Texas

ARKLA Petroleum, LLC (Subsidiary of NGS Sub. Corp.)

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Louisiana

NGS Resources, LLC (Subsidiary of NGS Technologies, Inc.)

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Texas