1 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Mar 2025 |
2 | Alpha Energy LLC | Ashland, OR 97520 | Oil & Gas Operator | Dec 2024 |
3 | Altex Oil Company | Breckenridge, CO 80424 | Oil & Gas Operator | Dec 2005 |
4 | Amax Oil & Gas Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
5 | Amplify Energy Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
6 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Mar 2025 |
7 | Anchor Bay Corporation | Denver, CO 80202 | Oil & Gas Operator | Jun 2007 |
8 | Anr Production Company | Houston, TX 77046 | Oil & Gas Operator | Aug 2017 |
9 | Anschutz Exploration Corporation | Denver, CO 80202 | Oil & Gas Operator | Mar 2025 |
10 | Ant Hills Production | Lusk, WY 82225 | Oil & Gas Operator | Nov 2024 |
11 | Antelope Energy Company LLC | Denver, CO 80202 | Oil & Gas Operator | Dec 2024 |
12 | Antler Energy LLC | Baggs, WY 82321 | Oil & Gas Operator | Dec 2024 |
13 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Mar 2025 |
14 | Ashland Exploration | | Oil & Gas Operator | May 1979 |
15 | Axem Resources Inc | Denver, CO 80202-4617 | Oil & Gas Operator | Jul 2013 |
16 | Barrel Springs Development Corp | Denver, CO 80202 | Oil & Gas Operator | Oct 1986 |
17 | Benson-Montin-Greer DRLG Corp | Farmington, NM 87402 | Oil & Gas Operator | Feb 2025 |
18 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Mar 2025 |
19 | Berenergy Corporation | Denver, CO 80217 | Oil & Gas Operator | Feb 2025 |
20 | BHB Oil Partners LLC | Powell, WY 82435 | Oil Operator | Dec 2024 |
21 | BHP Petroleum (USA) Inc | | Oil & Gas Operator | Mar 1993 |
22 | Bitterroot Energy Partners LLC | | Oil & Gas Operator | Feb 2025 |
23 | Bluebonnet Energy Corporation | Englewood, CO 80112 | Oil & Gas Operator | Sep 2015 |
24 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Dec 2024 |
25 | Braden-Deem Inc | Wichita, KS 67226 | Oil & Gas Operator | Nov 2024 |
26 | Breitburn Operating LP | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
27 | Brower Oil & Gas Inc | Jenks, OK 74037 | Oil & Gas Operator | Nov 2022 |
28 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |
29 | Bullock Gladys C Trust | | Oil & Gas Operator | Dec 1999 |
30 | Burlington Resources Oil & Gas Company L | Gillette, WY 82718 | Oil & Gas Operator | Jan 2022 |
31 | Byron Oil Industries Inc | Ballwin, MO 63011 | Oil & Gas Operator | Apr 2019 |
32 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Dec 2024 |
33 | Carbon Creek Energy LLC | Sheridan, WY 82801 | Oil & Gas Operator | Dec 2024 |
34 | CDX Gas, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Oct 2009 |
35 | Celsius Energy Company | Denver, CO 80202-1558 | Oil & Gas Operator | Mar 2000 |
36 | Cenex | | Oil & Gas Operator | Dec 1996 |
37 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | Jan 2025 |
38 | Chambers Jerry | Denver, CO 80237 | Oil & Gas Operator | Dec 1993 |
39 | Chancellor & Dolezal | | Gas Operator | Apr 1992 |
40 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2025 |
41 | Charger Resources, LLC | Hurst, TX 76054 | Oil & Gas Operator | Aug 2015 |
42 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Mar 2025 |
43 | Cig Exploration | Denver, CO 80201 | Oil & Gas Operator | Sep 1999 |
44 | Cirque Resources LP | Denver, CO 80202 | Oil & Gas Operator | Aug 2016 |
45 | Coleman Oil & Gas Inc | Farmington, NM 87499 | Oil & Gas Operator | Jan 2023 |
46 | Columbus Energy Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
47 | Consolidated Oil & Gas Inc | Wichita, KS 67202 | Oil & Gas Operator | Dec 2012 |
48 | Continental Industries LC | Casper, WY 82602 | Oil & Gas Operator | Feb 2008 |
49 | Continental Production Co LLC | Greenwood VIllage, CO 80155 | Oil & Gas Operator | Aug 2012 |
50 | Cordillera Corporation | Denver, CO 80237 | Oil & Gas Operator | Feb 1996 |
51 | Cornerstone Natural Resources LLC | Denver, CO 80234 | Oil & Gas Operator | Jan 2025 |
52 | Cotton Petroleum Corporation | Tulsa, OK 74102 | Oil & Gas Operator | Jan 2005 |
53 | Cox Edwin L & Berry R | | Oil & Gas Operator | Oct 1987 |
54 | Crowheart Energy LLC | Baggs, WY 82321 | Oil & Gas Operator | Jan 2025 |
55 | Dalen Resources Oil & Gas Co. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
56 | Davis Oil Company | Pawhuska, OK 74056 | Oil & Gas Operator | Jun 2018 |
57 | Decalta International Corp | Denver, CO 80202 | Oil & Gas Operator | Mar 2015 |
58 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2025 |
59 | Devon SFS Operating Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2008 |
60 | Diamond Oil & Gas LLC | Casper, WY 82604 | Oil & Gas Operator | Jan 2025 |
61 | Dolezal George Jr | Littleton, CO 80163 | Oil & Gas Operator | Sep 2006 |
62 | Eastern American Energy Corp | | Oil & Gas Operator | Dec 2008 |
63 | Eex Corporation | Houston, TX 77060 | Oil & Gas Operator | Feb 2000 |
64 | Emc Energy | | Oil & Gas Operator | Jun 1985 |
65 | Energetics Inc | Englewood, CO 80155 | Oil & Gas Operator | Aug 1985 |
66 | Energy Operating Company Inc | Lakewood, CO 80235 | Oil & Gas Operator | Dec 2012 |
67 | Energy Reserves Group | Houston, TX 770563020 | Oil & Gas Operator | Apr 1996 |
68 | Entek GRB LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2021 |
69 | EOG Y Resources Inc | Artesia, NM 88210 | Oil & Gas Operator | Feb 2019 |
70 | Equitable Resources Energy Company | Big Stone Gap, VA 24219 | Oil & Gas Operator | Dec 1997 |
71 | Equity Oil Company | Salt Lake City, UT 84110-095 | Oil & Gas Operator | Aug 2004 |
72 | Escalera Resources Co | Casper, WY 82602 | Oil & Gas Operator | May 2018 |
73 | Exeter Drilling Company | Denver, CO 80217 | Oil & Gas Operator | Sep 1997 |
74 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Mar 2025 |
75 | Ferguson Bob | Casper, WY 82605 | Oil Operator | May 2004 |
76 | Fidelity Exploration & Production Company | Denver, CO 80203 | Oil & Gas Operator | Feb 2025 |
77 | Foundation Energy Managment LLC | Addison, TX 74119 | Oil & Gas Operator | Jan 2025 |
78 | Fuel Resources Development Co | Denver, CO 80202 | Oil & Gas Operator | Feb 1994 |
79 | Gary-Williams Production Company | Denver, CO 80202 | Oil & Gas Operator | May 2000 |
80 | Gasco Inc | | Oil & Gas Operator | Jun 1998 |
81 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
82 | GKM Inc | | Oil & Gas Operator | Mar 1990 |
83 | GMT Exploration Company LLC | Denver, CO 80202 | Oil & Gas Operator | Jan 2025 |
84 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
85 | GRB Resources | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2004 |
86 | Greenstreet Lloyd | | Oil Operator | Dec 1986 |
87 | Griffin Bennie C | Arora, CO 80011 | Gas Operator | Dec 1993 |
88 | Grizzly Operating LLC | Houston, TX 77057 | Oil & Gas Operator | Jan 2025 |
89 | GRMR Oil And Gas LLC | Broomfield, CO 80021 | Oil & Gas Operator | Feb 2025 |
90 | Gulf Energy Corporation | Denver, CO 80237 | Oil & Gas Operator | Jun 1987 |
91 | Gulf Oil Corp. | Denver, CO 80201-0599 | Oil & Gas Operator | Dec 2012 |
92 | Hallador Petroleum LLP | Denver, CO 80264 | Oil & Gas Operator | Feb 2019 |
93 | Henderson Petroleum Corp | San Angelo, TX 76906 | Oil & Gas Operator | Jul 2013 |
94 | Home Petroleum Corp | Victoria, TX 77902 | Oil & Gas Operator | Mar 2025 |
95 | HRM Resources III LLC | Denver, CO 80202 | Oil & Gas Operator | Jun 2022 |
96 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | Mar 2025 |
97 | Incline Reserves Inc | Topeka, KS BAD ADDR | Oil & Gas Operator | Mar 1994 |
98 | Industrial Gas Services Inc | Wheat Ridge, CO 80033 | Oil & Gas Operator | Feb 2023 |
99 | Inexco Oil Company | Houston, TX 77210 | Oil & Gas Operator | Mar 2013 |
100 | Integrity Oil & Gas | Golden, CO 80401 | Oil & Gas Operator | May 2011 |