1 | Alexander Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
2 | Altus Exploration Company | Denver, CO 80202 | Oil & Gas Operator | Jul 1984 |
3 | Anchor Bay Corporation | Denver, CO 80202 | Oil & Gas Operator | Jun 2007 |
4 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Dec 2024 |
5 | Arch Oil And Gas Company | Midland, TX 79702 | Oil & Gas Operator | Feb 1994 |
6 | Axem Resources Inc | Denver, CO 80202-4617 | Oil & Gas Operator | Jul 2013 |
7 | Banks Operating Company | | Oil & Gas Operator | Jul 1989 |
8 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
9 | Beartooth Oil & Gas Company | Billings, MT 59103 | Oil & Gas Operator | Oct 2024 |
10 | Big Chief Exploration | Palisades, CO 81526 | Oil & Gas Operator | Oct 1993 |
11 | Big Wells Energy Corp | Katy, TX 77494 | Oil & Gas Operator | Sep 2019 |
12 | Black Hills Exploration & Production Inc | Newcastle, WY 82701 | Oil & Gas Operator | May 2018 |
13 | Bower Properties LLC | Worland, WY 82401 | Oil & Gas Operator | Aug 2005 |
14 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Oct 2024 |
15 | Breitburn Operating LP | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
16 | Brent Exploration | | Oil & Gas Operator | Dec 1993 |
17 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Sep 2024 |
18 | Carol-Holly Oil Corporation | Denver, CO 80237 | Oil & Gas Operator | Oct 2024 |
19 | Cenex | | Oil & Gas Operator | Dec 1996 |
20 | Chambers Jerry | Denver, CO 80237 | Oil & Gas Operator | Dec 1993 |
21 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Dec 2024 |
22 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Dec 2024 |
23 | Contango Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
24 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Dec 2024 |
25 | Coquina Oil Corporation | Houston, TX 77227 | Oil & Gas Operator | Mar 2015 |
26 | Coronado Oil Company | Denver, CO 80202 | Oil & Gas Operator | Dec 2019 |
27 | Cotton Petroleum Corporation | Tulsa, OK 74102 | Oil & Gas Operator | Jan 2005 |
28 | Davey Corporation | Golden, CO 80401 | Oil & Gas Operator | Oct 2024 |
29 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2024 |
30 | Dietrich Resources Corporation | | Oil & Gas Operator | Jun 2007 |
31 | DNR Oil And Gas, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Oct 2024 |
32 | Dominion Exploration & Production Inc | Houston, TX 77060 | Oil & Gas Operator | Apr 2015 |
33 | Dyco Petroleum Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
34 | Endeavor Energy LLC | | Oil Operator | Sep 2023 |
35 | Enduro Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2018 |
36 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Dec 2024 |
37 | Exxonmobil Oil Corp | Houston, TX 77210 | Oil & Gas Operator | Oct 2024 |
38 | Family Tree Corporation | Lakewood, CO 80228 | Oil & Gas Operator | Feb 2013 |
39 | Faulconer Vernon E Inc | Tyler, TX 75711 | Oil & Gas Operator | Oct 2024 |
40 | Fidelity Exploration & Production Company | Denver, CO 80203 | Oil & Gas Operator | Nov 2024 |
41 | Florida Gas Exploration Co | | Oil & Gas Operator | Feb 1985 |
42 | Flying J Oil & Gas Inc | North Salt Lake, UT 84054 | Oil & Gas Operator | Dec 2009 |
43 | Fuel Exploration Inc | Denver, CO 80295 | Oil & Gas Operator | Jan 1992 |
44 | Gallagher Drilling Inc | Evansville, IN 47730 | Oil Operator | Dec 2020 |
45 | Gary-Williams Production Company | Denver, CO 80202 | Oil & Gas Operator | May 2000 |
46 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
47 | Grace Petroleum Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Oct 1997 |
48 | Granite Creek Energy LLC | | Oil & Gas Operator | Oct 2024 |
49 | Gulf Oil Corp. | Denver, CO 80201-0599 | Oil & Gas Operator | Dec 2014 |
50 | Hallador Petroleum LLP | Denver, CO 80264 | Oil & Gas Operator | Feb 2019 |
51 | Hanson Operating Company Inc | Roswell, NM 88202 | Oil & Gas Operator | Sep 2024 |
52 | Herbaly Petroleum Corp | FT Worth, TX 76102 | Oil & Gas Operator | Feb 2002 |
53 | HMX Investments Inc | Katy, TX 77494 | Oil & Gas Operator | Sep 2024 |
54 | Huntington Energy LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Dec 2024 |
55 | Intercontinental Petroleum | | Oil Operator | Oct 2012 |
56 | Internorth Inc | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2014 |
57 | Intoil, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Dec 2002 |
58 | J & J Production LLC | Worland, WY 82401 | Oil Operator | Sep 2024 |
59 | JN Exploration & Prod | Billings, MT 59103-0159 | Oil & Gas Operator | Apr 2001 |
60 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Dec 2024 |
61 | KCS Mountain Resources Inc | Manderson, WY 82432 | Oil & Gas Operator | Nov 2006 |
62 | Kentex Worland LLC | Dallas, TX 75225 | Oil & Gas Operator | Oct 2024 |
63 | Kiska Oil & Gas Inc | Tulsa, OK 74103 | Oil Operator | Oct 2012 |
64 | Koch Exploration Company, LLC | Denver, CO 80202 | Oil & Gas Operator | Jun 2019 |
65 | Koch Production Company | Worland, WY 82401 | Oil & Gas Operator | Dec 2002 |
66 | KWB Oil Property Management Inc | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2024 |
67 | L & R Drilling Company | Belle Fourche, SD 57717 | Oil & Gas Operator | Dec 1999 |
68 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Dec 2024 |
69 | M & C Oil Inc | Indianola, NE 68034 | Oil & Gas Operator | Nov 2013 |
70 | Marathon Oil Company | Houston, TX 77024 | Oil & Gas Operator | Oct 2024 |
71 | Markus Production | Littleton, CO 80123 | Oil & Gas Operator | Oct 2024 |
72 | McRae & Henry LTD | Golden, CO 80401 | Oil & Gas Operator | May 2022 |
73 | Mid-Con Energy Operating, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2024 |
74 | Mitchell Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Aug 2013 |
75 | Nance Petroleum Corporation | Billings, MT 59103-7168 | Oil & Gas Operator | Nov 2007 |
76 | Natural Gas Processing Company | Worland, WY 82401 | Oil & Gas Operator | Oct 2024 |
77 | Nielson & Associates Inc | Cody, WY 82414 | Oil & Gas Operator | Feb 2016 |
78 | Nortex Gas & Oil Co | Tulsa, OK 74135 | Oil & Gas Operator | Sep 1993 |
79 | P.O.&G. Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Dec 2024 |
80 | Pacific Enterprises Oil Co USA | Dallas, TX 75201 | Oil & Gas Operator | Feb 2001 |
81 | Pearce Leonard | Manderson, WY 82432 | Oil Operator | Dec 1999 |
82 | Pearce Mary | | Oil Operator | Dec 1999 |
83 | Pedry J J | | Oil Operator | Sep 1989 |
84 | Petrogulf Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2024 |
85 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
86 | Phoenix Production Company | Cody, WY 82414-3607 | Oil & Gas Operator | Oct 2023 |
87 | Pioneer Natural Resources USA Inc | Irving, TX 75039 | Oil & Gas Operator | Aug 2024 |
88 | Polumbus Corp, The | Denver, CO 80202 | Oil & Gas Operator | Sep 1982 |
89 | Prima Exploration, Inc. | Denver, CO 80206 | Oil & Gas Operator | Oct 2024 |
90 | Qep Energy Company | Midland, TX 79701 | Oil & Gas Operator | Sep 2024 |
91 | Quinoco Petroleum Inc | | Oil & Gas Operator | Dec 1990 |
92 | Resolute Wyoming Inc | Denver, CO 80203 | Oil & Gas Operator | May 2018 |
93 | Rim Operating, Inc. | Englewood, CO 80112 | Oil & Gas Operator | Dec 2024 |
94 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
95 | Saga Petroleum LLC Of Colorado | Norman, OK 73072 | Oil & Gas Operator | Dec 2024 |
96 | Samson Resources Company LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2021 |
97 | Seguro Oil & Gas Inc | | Oil Operator | Jul 1992 |
98 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Dec 2024 |
99 | Supron Energy Corp | | Oil & Gas Operator | Oct 1995 |
100 | T2 Operating Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2024 |