Select Disclosure: (US GAAP)

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Economic Entity Name

1 APACHE CORP
2 ATLAS AMERICA PUBLIC #10 LTD.
3 ATLAS AMERICA PUBLIC #11-2002 LTD.
4 ATLAS AMERICA PUBLIC #12-2003 Limited Partnership
5 Atlas America Public #14-2004 L.P.
6 Atlas America Public #14-2005 (A) L.P.
7 Atlas America Public #15-2005 (A) L.P.
8 Atlas America Public #15-2006 (B) L.P.
9 ATLAS AMERICA PUBLIC #9 LTD.
10 ATLAS AMERICA SERIES 25-2004 (A) L.P.
11 ATLAS AMERICA SERIES 25-2004 (B) L.P.
12 Atlas America Series 26-2005 L.P.
13 Atlas America Series 27-2006 L.P.
14 Atlas Resources Public #16-2007 (A) L.P.
15 Atlas Resources Public #17-2007 (A) L.P.
16 Atlas Resources Public #17-2008 (B) L.P.
17 Atlas Resources Public #18-2008 (A) L.P.
18 Atlas Resources Public #18-2009 (B) L.P.
19 Atlas Resources Public #18-2009 (C) L.P.
20 Atlas Resources Series 28-2010 L.P.
21 BILL BARRETT CORP
22 BLACK HILLS CORP /SD/
23 BreitBurn Energy Partners L.P.
24 CALLON PETROLEUM CO
25 Caprock Oil, Inc.
26 CIMAREX ENERGY CO
27 Comstock Mining Inc.
28 Comstock Mining Inc.
29 CONOCOPHILLIPS
30 DENBURY RESOURCES INC
31 ENERGY XXI (BERMUDA) LTD
32 EOG RESOURCES INC
33 EXCO RESOURCES INC
34 FIELDPOINT PETROLEUM CORP
35 HARVEST NATURAL RESOURCES, INC.
36 Kodiak Oil & Gas Corp
37 NEWFIELD EXPLORATION CO /DE/
38 PANHANDLE OIL & GAS INC
39 PANHANDLE OIL & GAS INC
40 QR Energy, LP
41 Reef Global Energy VI, L.P.
42 Reef Global Energy VII, L.P.
43 Reef Oil & Gas Drilling & Income Fund, L.P.
44 Reef Oil & Gas Income & Development Fund III LP
45 REGENT TECHNOLOGIES INC
46 Resolute Energy Corp
47 Texas Rare Earth Resources Corp.
48 UNIT CORP
49 W&T OFFSHORE INC
50 WHITING PETROLEUM CORP

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