EXHIBIT 21.1
 
SUBSIDIARIES OF ATLAS AMERICA, INC.
 
Name
 
Jurisdiction
Atlas America, LLC
 
Pennsylvania
AED Investments, Inc.
 
Delaware
Atlas America Mid-Continent, Inc.
 
Delaware
Atlas Resource Pennsylvania, Inc.
 
Delaware
Atlas Energy Management, Inc.
 
Delaware
Atlas Energy Resources, LLC
 
Delaware
Atlas Energy Operating Company, LLC
 
Delaware
Atlas Noble, LLC
 
Delaware
AER Pipeline Construction, Inc.
 
Delaware
Viking Resources, LLC
 
Pennsylvania
AIC, LLC
 
Delaware
Atlas Energy Ohio, LLC
 
Ohio
Atlas Resources, LLC
 
Pennsylvania
Anthem Securities, Inc.
 
Pennsylvania
Resource Energy, LLC
 
Delaware
Resource Well Services, LLC
 
Delaware
REI-NY, LLC
 
Delaware
Atlas Lightfoot, LLC
 
Delaware
Atlas Energy Finance Corp.
 
Delaware
Atlas Energy Michigan, LLC
 
Delaware
Atlas Gas & Oil Company, LLC
 
Michigan
Westside Pipeline Company, LLC
 
Michigan
Atlas Pipeline Holdings GP, LLC
 
Delaware
Atlas Pipeline Holdings, L.P.
 
Delaware
Atlas Pipeline Partners GP, LLC
 
Delaware
Atlas Pipeline Partners, L. P.
 
Delaware
Atlas Pipeline Operating Partnership, L.P.
 
Delaware
Atlas Pipeline New York, LLC
 
Pennsylvania
Atlas Pipeline Ohio, LLC
 
Pennsylvania
Atlas Pipeline Pennsylvania, LLC
 
Pennsylvania
Atlas Pipeline McKean, LLC
 
Pennsylvania
Atlas Pipeline Tennessee, LLC
 
Pennsylvania
Atlas Pipeline Mid-Continent LLC
 
Delaware
Elk City Oklahoma Pipeline, L.P.
 
Texas
Elk City Oklahoma GP, LLC
 
Delaware
Atlas Arkansas Pipeline LLC
 
Oklahoma
Atlas Pipeline Finance Corp.
 
Delaware
NOARK Pipeline System, Limited Partnership
 
Arkansas
Mid-Continent Arkansas Pipeline, LLC
 
Arkansas
Ozark Gas Transmission, LLC
 
Oklahoma
Ozark Gas Gathering, LLC
 
Oklahoma
NOARK Energy Services, LLC
 
Oklahoma
Atlas Midkiff, LLC
 
Delaware
Atlas Chaney Dell, LLC
 
Delaware
Atlas Pipeline Mid-Continent WestTex, LLC
 
Delaware
Atlas Pipeline Mid-Continent WestOk, LLC
 
Delaware