1 | 1876 Resources LLC | Highlands Ranch, CO 80129 | Oil & Gas Operator | Sep 2024 |
2 | 44 Mag Production Inc | | Gas Operator | Mar 2012 |
3 | 4W Ranch | Newcastle, WY 82701 | Oil Operator | Apr 2008 |
4 | 8 North LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2024 |
5 | Aberdeen Petroleum (USA) Inc. | Abilene, TX 79608 | Oil & Gas Operator | Sep 1994 |
6 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Nov 2024 |
7 | Accidental Oil Company Inc | Newcastle, WY 82701 | Oil & Gas Operator | Feb 2021 |
8 | Adams H D LLC | Moorcroft, WY 82721 | Oil & Gas Operator | Sep 2024 |
9 | Adobe Resources Corporation | Midland, TX 79701 | Oil & Gas Operator | Aug 2002 |
10 | Advanced Recovery Services Co | Denver, CO 80265 | Oil & Gas Operator | Apr 2007 |
11 | Aethon Energy Operating LLC | Dallas, TX 75251 | Oil & Gas Operator | Nov 2024 |
12 | Aexco Petroleum Inc | Denver, CO 80202 | Oil & Gas Operator | Aug 2024 |
13 | Agri-Acres Inc | Billings, MT 59103 | Oil Operator | Jun 1996 |
14 | Ajax Oil Company | Billings, MT 59103 | Oil & Gas Operator | Dec 2003 |
15 | Alexander Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
16 | Allen And Crouch | Casper, WY 82602 | Oil & Gas Operator | Mar 2020 |
17 | Allen And Schramm Inc | Denver, CO 80202 | Oil & Gas Operator | Aug 1996 |
18 | Allie Oil | | Oil Operator | May 2000 |
19 | Alpha Coal West Inc | Gillette, WY 82716 | Oil & Gas Operator | Jun 2020 |
20 | Alpha Energy LLC | Ashland, OR 97520 | Oil & Gas Operator | Aug 2024 |
21 | Alpha Petrovision Us Inc | Canada, 00100 | Oil & Gas Operator | May 2013 |
22 | Altex Oil Company | Breckenridge, CO 80424 | Oil & Gas Operator | Dec 2005 |
23 | Altus Exploration Company | Denver, CO 80202 | Oil & Gas Operator | Jul 1984 |
24 | Am-West Petroleum Inc | Upton, WY 82730 | Oil & Gas Operator | Sep 2015 |
25 | Amarex Inc | | Oil & Gas Operator | Dec 1996 |
26 | Amax Oil & Gas Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
27 | Amberex Corporation | Denver, CO 80237 | Oil & Gas Operator | Sep 1984 |
28 | Ambrit Energy Corporation | Garland, TX 75044 | Oil & Gas Operator | Jun 2003 |
29 | Amerada Hess Corporation | Houston, TX 77252 | Oil & Gas Operator | Aug 2013 |
30 | American Eagle Oil | Casper, WY 82605 | Oil & Gas Operator | Dec 2012 |
31 | American Energy Partners Inc | Boerne, TX 78006 | Oil & Gas Operator | Dec 2011 |
32 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
33 | Ames Oil And Gas | | Oil & Gas Operator | Apr 1986 |
34 | Aminoil USA Inc | | Oil & Gas Operator | Jan 1985 |
35 | Amplify Energy Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Nov 2024 |
36 | Ampolex Wy Inc | Gillette, WY 82716 | Oil & Gas Operator | Mar 1997 |
37 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Nov 2024 |
38 | Anadarko Minerals Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Aug 2024 |
39 | Anadarko Ogc Company | Houston, TX 77251 | Oil & Gas Operator | Dec 1998 |
40 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Aug 2024 |
41 | Anchor Bay Corporation | Denver, CO 80202 | Oil & Gas Operator | Jun 2007 |
42 | Anderson Management Company | Gillette, WY 82716 | Oil & Gas Operator | May 2016 |
43 | Anderson Oil Company | Burkburnett, TX 76354 | Oil & Gas Operator | Dec 2015 |
44 | Andrikopoulos A G | Cheyenne, WY 82009 | Oil & Gas Operator | Dec 1994 |
45 | Angus Petroleum Corporation | Chicago, IL 60660 | Oil & Gas Operator | Dec 2022 |
46 | Anr Production Company | Houston, TX 77046 | Oil & Gas Operator | Aug 2017 |
47 | Anschutz Corporation, The | Denver, CO 80202 | Oil & Gas Operator | Sep 2016 |
48 | Anschutz Exploration Corporation | Denver, CO 80202 | Oil & Gas Operator | Nov 2024 |
49 | Anschutz Oil Company LLC | Denver, CO 80202 | Oil & Gas Operator | Sep 2020 |
50 | Anschutz Pinedale Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2015 |
51 | Ant Hills Production | Lusk, WY 82225 | Oil & Gas Operator | Aug 2024 |
52 | Antelope Energy Company LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2024 |
53 | Antelope Resources Inc | Billings, MT 59101 | Oil & Gas Operator | May 2017 |
54 | Antero Energy LLC | Denver, CO 80202 | Gas Operator | Nov 2003 |
55 | Antler Energy LLC | Baggs, WY 82321 | Oil & Gas Operator | Aug 2024 |
56 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Nov 2024 |
57 | Apc Operating Partnership | Tulsa, OK 74136 | Oil & Gas Operator | Oct 1996 |
58 | Apollo 17 Oil And Gas Inc | | Oil Operator | Feb 1988 |
59 | Apollo Drilling And Exploration | | Oil & Gas Operator | Oct 1980 |
60 | Apx Western Corporation | Denver, CO 80217 | Oil & Gas Operator | Sep 1991 |
61 | Aquarius Oil And Gas | Casper, WY 82601 | Oil & Gas Operator | Sep 2017 |
62 | Arabie, Inc. | Lake Charles, LA 70605 | Oil & Gas Operator | Nov 2024 |
63 | Arapaho Petroleum Inc | Englewood, CO 80155 | Oil & Gas Operator | Nov 1998 |
64 | Arch Oil And Gas Company | Midland, TX 79702 | Oil & Gas Operator | Feb 1994 |
65 | Arena Resources LLC | Longview, TX 75608 | Oil & Gas Operator | Aug 2024 |
66 | Argent Energy (Us) Holdings Inc | Sugar Land, TX 77479 | Oil & Gas Operator | Sep 2021 |
67 | Argentia Operating Company | | Oil Operator | Oct 1991 |
68 | Argo Petroleum Corporation | | Oil & Gas Operator | Dec 1989 |
69 | Arjay Oil Company | Salt Lake City, UT 84110 | Oil & Gas Operator | May 2000 |
70 | Arkland Producing Co Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2023 |
71 | Arnell Oil Company | Centennial, CO 80122 | Oil & Gas Operator | Aug 2024 |
72 | Arrowhead Resources USA LTD | | Oil & Gas Operator | Dec 1992 |
73 | Asamera Oil (Us) Inc | Denver, CO 80201 | Oil & Gas Operator | Jul 1985 |
74 | Asher Associates Inc | Centennial, CO 80112 | Oil & Gas Operator | Aug 2016 |
75 | Ashland Exploration | | Oil & Gas Operator | May 1979 |
76 | Atasca Resources Inc | Houston, TX 77219 | Oil & Gas Operator | Nov 2024 |
77 | Atlantic Oil And Gas Development LLC | Rockledge, FL 32955 | Oil Operator | Jul 2024 |
78 | Atlantic Oil Corporation | Denver, CO 80206 | Oil & Gas Operator | Dec 1982 |
79 | Atlantic Richfield Company | Plano, TX 75074 | Oil & Gas Operator | Dec 2016 |
80 | Atr Energy Corp | Dallas, TX 75313 | Oil Operator | Sep 2024 |
81 | Atx Energy Partners LLC | Austin, TX 78716 | Oil & Gas Operator | Aug 2024 |
82 | Augustus Energy Partners LLC | Billings, MT 59102 | Oil & Gas Operator | Feb 2014 |
83 | Avalon Energy Corporation | | Oil & Gas Operator | Jul 1990 |
84 | Axem Resources Inc | Denver, CO 80202-4617 | Oil & Gas Operator | Jul 2013 |
85 | Axia Energy III LLC | Highlands Ranch, CO 80124 | Oil & Gas Operator | Jul 2023 |
86 | Axiom Energy LLC | Park City, UT 84098 | Oil Operator | Feb 2010 |
87 | Azalea Oil Company LLC | Castle Rock, CO 80108 | Oil Operator | Aug 2024 |
88 | Aztec Gas And Oil Corporation | Elephant Butte, NM 87935-0370 | Oil & Gas Operator | Mar 2005 |
89 | B J Oil Company | Corsicana, TX 75109 | Oil & Gas Operator | Nov 2024 |
90 | Baldes Henry | Riverton, WY 82501 | Oil Operator | Dec 1998 |
91 | Balidor Oil & Gas LLC | Houston, TX 77070 | Oil & Gas Operator | Oct 2021 |
92 | Ballard Petroleum Holdings LLC | Billings, MT 59104 | Oil & Gas Operator | Sep 2024 |
93 | Balsam R C | | Oil & Gas Operator | Apr 1991 |
94 | Bandera Energy Company | | Oil & Gas Operator | Mar 1986 |
95 | Banding M R Inc | Gillette, WY 82717 | Oil & Gas Operator | Sep 2024 |
96 | Baney Well Service Inc | Denver, CO 80237 | Oil Operator | Jun 2016 |
97 | Banks And Conrad | | Oil Operator | Sep 1987 |
98 | Banks Operating Company | | Oil & Gas Operator | Jul 1989 |
99 | Bannon Energy Inc | Houston, TX 77068 | Oil & Gas Operator | Jun 1998 |
100 | Banta And Haigh | Aurora, CO 80014 | Oil & Gas Operator | Feb 1998 |