Biggest US Oil and Gas Companies

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PetroStrategies, Inc.
PO Box 260415
Plano, Texas 75026-0415
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Biggest US Oil and Gas Companies

Rank by 2009 Assets¹	Company	Worldwide Liquids Production, Million Barrels	Worldwide Natural Gas Production, Billion Cubic Feet
1	Exxon Mobil Corporation	725.0	2,383.0
2	ConocoPhillips	674.0	1,821.0
3	Chevron Corporation	341.0	1,906.0
4	Anadarko Petroleum Corporation	88.0	817.0
5	Marathon Oil Corporation	90.0	351.0
6	Occidental Petroleum Corporation	179.0	338.0
7	XTO Energy Inc.	31.7	855.0
8	Chesapeake Energy Corporation	11.8	835.0
9	Devon Energy Corporation	72.0	966.0
10	Hess Corporation	107.0	270.0
11	Apache Corporation	105.9	642.0
12	El Paso Corporation	5.648	219.0
13	EOG Resources, Inc.	28.75	616.8
14	Murphy Oil Corporation	48.20	68.40
15	Noble Energy Inc.	29.00	285.0
16	Williams Companies, Inc.²	NA	435.0
17	Questar Corporation	3.50	168.7
18	Pioneer Natural Resources Company	19.03	157.4
19	Plains Exploration & Production Company	17.56	78.18
20	Petrohawk Energy Corp.	1.52	174.0
21	Newfield Exploration Company	14.00	257.0
22	Range Resources Corporation	4.744	130.6
23	Southwestern Energy Co.	0.124	299.7
24	Denbury Resources, Inc.	13.50	24.76
25	Whiting Petroleum Corp.	15.38	29.33
26	Energen Resources Corporation	6.481	72.34
27	Helix Energy Solutions Group Inc.	2.741	27.33
28	Forest Oil Corporation	7.265	139.3
29	Cabot Oil & Gas Corporation	0.844	97.91
30	Encore Acquisition Co.	10.02	33.92
31	Quicksilver Resources Inc.	5.403	86.04
32	Cimarex Energy Company	8.498	118.0
33	Concho Resources Inc.	7.336	21.57
34	EQT Production	0.099	104.3
35	Penn Virginia Corporation	1.277	43.34
36	Mariner Energy Inc.	5.950	90.80
37	ATP Oil & Gas Corp.	3.353	15.12
38	SandRidge Energy Inc.	2.894	87.46
39	SM Energy Inc.³	6.328	71.11
40	Exco Resources Inc.	1.571	118.7
41	Continental Resources Inc.	10.02	21.61
42	Berry Petroleum Co.	7.186	22.66
43	Unit Corporation	2.774	44.06
44	Kinder Morgan CO2 Co. LP	15.68	0.298
45	CNX Gas Corp.	NA	94.42
46	Atlas Energy Inc.^2,4	0.199	35.76
47	Ultra Petroleum Corp.	1.320	172.2
48	Bill Barrett Corp.	0.710	85.49
49	Comstock Resources Inc.	0.775	60.82
50	Eagle Rock Energy Partners	0.984	4.914

Notes:

¹ Ranked in order of 2009 worldwide oil equivalent reserves as reported in "OGJ 200/100", Oil & Gas Journal, September 15, 2010. .
² Oil and gas operations only.

³ Formerly St. Mary Land & Exploration Company

⁴ Bought by Chevron as announced November 9, 2010

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