1 | Allie Oil | | Oil Operator | May 2000 |
2 | Amax Oil & Gas Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
3 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Dec 2024 |
4 | Anadarko Ogc Company | Houston, TX 77251 | Oil & Gas Operator | Dec 1998 |
5 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Sep 2024 |
6 | Anschutz Corporation, The | Denver, CO 80202 | Oil & Gas Operator | Sep 2016 |
7 | Anschutz Exploration Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2024 |
8 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Dec 2024 |
9 | Bannon Energy Inc | Houston, TX 77068 | Oil & Gas Operator | Jun 1998 |
10 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
11 | Berenergy Corporation | Denver, CO 80217 | Oil & Gas Operator | Nov 2024 |
12 | Big Piney Oil & Gas Company | Dallas, TX 75206 | Oil & Gas Operator | Sep 1992 |
13 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Oct 2024 |
14 | Breitburn Operating LP | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
15 | Bwab Incorporated | Denver, CO 80202 | Oil & Gas Operator | Aug 1996 |
16 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Sep 2024 |
17 | Celsius Energy Company | Denver, CO 80202-1558 | Oil & Gas Operator | Mar 2000 |
18 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Dec 2024 |
19 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Dec 2024 |
20 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
21 | Crown Oil & Gas Co Inc | Labarge, WY 83123 | Oil & Gas Operator | Jan 2023 |
22 | Davis Petroleum Corp. | Houston, TX 77027 | Oil & Gas Operator | Dec 2024 |
23 | Dawson Resources Inc | Franktown, CO 80116 | Oil & Gas Operator | Mar 2015 |
24 | Department Of Energy | Casper, WY 82601 | Oil & Gas Operator | Jan 2015 |
25 | Dome Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2016 |
26 | Enerex Limited Liability Co | Craig, CO 81625 | Oil & Gas Operator | Jun 2024 |
27 | Enstar Petroleum Inc | | Oil & Gas Operator | Apr 1985 |
28 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Dec 2024 |
29 | Exxonmobil Oil Corp | Houston, TX 77210 | Oil & Gas Operator | Oct 2024 |
30 | Ferguson Energy Inc | Evanston, WY 82930 | Oil & Gas Operator | Aug 2024 |
31 | First Energy Corporation | | Oil & Gas Operator | Jun 1993 |
32 | G & H Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Dec 2009 |
33 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
34 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
35 | Gulf Exploration, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Nov 2024 |
36 | Gulf Oil Corp. | Denver, CO 80201-0599 | Oil & Gas Operator | Dec 2014 |
37 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Dec 2024 |
38 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | Dec 2024 |
39 | Hyperion Oil & Gas LLC | Dallas, TX 75251 | Oil & Gas Operator | Dec 2024 |
40 | JN Exploration & Prod | Billings, MT 59103-0159 | Oil & Gas Operator | Apr 2001 |
41 | Joemar Wyoming Operating LLC | | Oil & Gas Operator | Oct 2024 |
42 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Dec 2024 |
43 | Kings Peak Energy, LLC | Denver, CO 80264 | Oil & Gas Operator | Feb 2019 |
44 | Lodestone Operating | Portland, TX 78374 | Oil & Gas Operator | Aug 2024 |
45 | M & C Oil Inc | Indianola, NE 68034 | Oil & Gas Operator | Nov 2013 |
46 | Medallion Exploration | Holladay, UT 84117 | Oil & Gas Operator | Dec 2015 |
47 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Dec 2024 |
48 | Mid Central Production LLC | Evanston, WY 82930 | Oil Operator | Jun 2024 |
49 | Midgard Energy Company | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2014 |
50 | Mountain Resource Corporation | Salt Lake City, UT 84124 | Oil & Gas Operator | Dec 1988 |
51 | Nielson Capital Partners LLC | Cody, WY 82414 | Oil & Gas Operator | Dec 2014 |
52 | North Shore Exploration & Production, LLC | Broomfield, CO 80021 | Oil & Gas Operator | Oct 2024 |
53 | Omimex Petroleum Inc (De) | Fort Worth, TX 76120 | Oil & Gas Operator | Aug 2020 |
54 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
55 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Dec 2024 |
56 | P & M Petroleum Management LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2021 |
57 | Petral Exploration Inc LLC | Denver, CO 80217 | Oil & Gas Operator | May 2007 |
58 | Petroleum Products Inc | | Oil Operator | Jun 1996 |
59 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
60 | Pioneer Natural Resources USA Inc | Irving, TX 75039 | Oil & Gas Operator | Aug 2024 |
61 | Plains Petroleum Operating Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2014 |
62 | Proven Petroleum, Inc. | Lakewood, CO 80228 | Oil & Gas Operator | Oct 2024 |
63 | Qep Energy Company | Midland, TX 79701 | Oil & Gas Operator | Sep 2024 |
64 | Reserve Oil & Gas Company | | Oil & Gas Operator | Jul 1981 |
65 | Richardson Oil Company | San Antonio, TX 78216 | Oil & Gas Operator | Aug 2003 |
66 | Richardson Operating Company | Denver, CO 80237 | Oil & Gas Operator | Sep 2024 |
67 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
68 | Rochelle Oil & Gas | Gillette, WY 82717 | Oil & Gas Operator | Mar 2024 |
69 | Rocky Mountain Gas Inc | Sheridan, WY 82801 | Gas Operator | Nov 2009 |
70 | Sabine Oil & Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
71 | Samson Resources Company LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2021 |
72 | Southern Mineral Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2001 |
73 | Spring Valley Development Co LLC | Centennial, CO 80014 | Oil & Gas Operator | Sep 2024 |
74 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Sep 2024 |
75 | Texaco Exploration & Prod | Midland, TX 79702 | Oil & Gas Operator | Aug 2002 |
76 | Toc Oil, Inc | Denver, CO 80202 | Oil & Gas Operator | Oct 2024 |
77 | Toc-Rocky Mountain Inc | | Oil & Gas Operator | Oct 2013 |
78 | Trout Kye Jr | | Oil & Gas Operator | Dec 2010 |
79 | Union Texas Petroleum | Houston, TX 77252 | Oil & Gas Operator | Oct 1991 |
80 | Urroz Oil & Gas LLC | Evanston, WY 82931 | Oil & Gas Operator | Jun 2020 |
81 | Wainoco Oil & Gas Company | Houston, TX 77024 | Oil & Gas Operator | Dec 2005 |
82 | Washington Energy Exploration | | Oil & Gas Operator | Dec 1997 |
83 | Western American Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Jun 2024 |
84 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
85 | Wexpro Company | Rock Springs, WY 82902-0458 | Oil & Gas Operator | Oct 2024 |
86 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
87 | Young, Marshall R., Oil Co. | Fort Worth, TX 76107 | Oil & Gas Operator | Mar 2011 |
88 | Zenergy Inc | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2024 |