EX-21.1 2 a2216543zex-21_1.htm EX-21.1
QuickLinks -- Click here to rapidly navigate through this document


Exhibit 21.1

Evolution Petroleum Corporation—A Nevada Corporation

Officers:
   
Robert S. Herlin   President and Chief Executive Officer
Sterling H. McDonald   Vice President, Chief Financial Officer and Treasurer
Daryl V. Mazzanti   Vice President, Operations
David Joe   Controller & Corporate Secretary

 

Directors:
   
Robert S. Herlin   Chairman of the Board
Laird Q. Cagan   Member
Edward J. DiPaolo   Member
Gene Stoever   Member
William Dozier   Member
Kelly Loyd   Member

NGS Sub Corp.—A Delaware Corporation

Officers:
   
Robert S. Herlin   President and Chief Executive Officer
Sterling H. McDonald   Chief Financial Officer and Treasurer
David Joe   Secretary

 

Directors:
   
Robert S. Herlin    
Sterling H. McDonald    

Arkla Petroleum, LLC—A Louisiana Corporation

NGS Sub Corp   Member
Robert S. Herlin   Manager
Sterling H. McDonald   Manager

NGS Technologies, Inc.—A Delaware Corporation

Officers:
   
Robert S. Herlin   President and Chief Executive Officer
Sterling H. McDonald   Chief Financial Officer and Treasurer
Daryl V. Mazzanti   Vice President, Operations
David Joe   Secretary

 

Directors:
   
Robert S. Herlin    
Daryl V. Mazzanti    

Evolution Operating Co. Inc.—A Texas Corporation

Officers:
   
Robert S. Herlin   President and Chief Executive Officer
Sterling H. McDonald   Vice President, Chief Financial Officer, Treasurer and Secretary
Daryl V. Mazzanti   Vice President, Operations
David Joe   Controller

 

Directors:
   
Robert S. Herlin    
Sterling H. McDonald    

Tertiaire Resources Company—A Texas Corporation

Officers:
   
Robert S. Herlin   President and Chief Executive Officer
Sterling H. McDonald   Vice President, Chief Financial Officer, Treasurer and Secretary
Daryl V. Mazzanti   Vice President, Operations

 

Directors:
   
Robert S. Herlin    
Sterling H. McDonald    
Daryl V. Mazzanti    

Evolution Petroleum OK, Inc.—A Texas Corporation

Officers:
   
Robert S. Herlin   President and Chief Executive Officer
Sterling H. McDonald   Vice President, Chief Financial Officer, Treasurer and Secretary
Daryl V. Mazzanti   Vice President, Operations
David Joe   Controller & Secretary

 

Directors:
   
Robert S. Herlin    
Sterling H. McDonald    



QuickLinks