1 | Aberdeen Petroleum (USA) Inc. | Abilene, TX 79608 | Oil & Gas Operator | Sep 1994 |
2 | Aethon Energy Operating LLC | Dallas, TX 75251 | Oil & Gas Operator | Dec 2024 |
3 | Alpha Petrovision Us Inc | Canada, 00100 | Oil & Gas Operator | May 2013 |
4 | Amerada Hess Corporation | Houston, TX 77252 | Oil & Gas Operator | Aug 2013 |
5 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Dec 2024 |
6 | Angus Petroleum Corporation | Chicago, IL 60660 | Oil & Gas Operator | Dec 2022 |
7 | Anschutz Corporation, The | Denver, CO 80202 | Oil & Gas Operator | Sep 2016 |
8 | Antelope Energy Company LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2024 |
9 | Antelope Resources Inc | Billings, MT 59101 | Oil & Gas Operator | May 2017 |
10 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Dec 2024 |
11 | Arapaho Petroleum Inc | Englewood, CO 80155 | Oil & Gas Operator | Nov 1998 |
12 | Arnell Oil Company | Centennial, CO 80122 | Oil & Gas Operator | Aug 2024 |
13 | Ashland Exploration | | Oil & Gas Operator | May 1979 |
14 | Atlantic Oil Corporation | Denver, CO 80206 | Oil & Gas Operator | Dec 1982 |
15 | Atlantic Richfield Company | Plano, TX 75074 | Oil & Gas Operator | Dec 2016 |
16 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
17 | Bates Creek Oil | | Oil Operator | Dec 1986 |
18 | Beartooth Oil & Gas Company | Billings, MT 59103 | Oil & Gas Operator | Oct 2024 |
19 | Berco Resources LLC | Denver, CO 80206 | Oil & Gas Operator | Sep 2009 |
20 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Dec 2024 |
21 | BHP Petroleum (USA) Inc | | Oil & Gas Operator | Mar 1993 |
22 | BHP Petroleum Company Inc | Houston, TX 77057 | Oil & Gas Operator | Jun 2016 |
23 | Bill Barrett Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2017 |
24 | Black Bear Oil Corporation | Las Vegas, NV 89128 | Oil & Gas Operator | Oct 2024 |
25 | Black Gold Services Inc | Casper, WY 82644 | Oil & Gas Operator | Nov 2024 |
26 | Blue Tip Energy Wyoming Inc | Houston, TX 77284 | Oil Operator | Jun 2016 |
27 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Oct 2024 |
28 | BP Exploration Inc | | Oil & Gas Operator | May 1993 |
29 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2024 |
30 | Breitburn Energy Company LLC | Lakewood, CO 80227 | Oil Operator | Aug 2011 |
31 | Breitburn Operating LP | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
32 | Brighton Energy LLC | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2015 |
33 | Brooks Exploration, Inc. | Denver, CO 80293 | Oil & Gas Operator | Mar 2001 |
34 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |
35 | Bummer Bruce L | Casper, WY 82602 | Oil & Gas Operator | Dec 2007 |
36 | Burlington Resources Oil & Gas Company L | Gillette, WY 82718 | Oil & Gas Operator | Jan 2022 |
37 | Burr Oil & Gas Inc | Farmington, NM 87499 | Oil & Gas Operator | Oct 2019 |
38 | Butler Oil Co | Casper, WY 82602 | Oil & Gas Operator | Dec 1996 |
39 | Callaway Oil & Gas LLC | Gillette, WY 82717 | Oil & Gas Operator | Sep 2024 |
40 | Capitan Operating LLC | Reno, NV 89502 | Oil & Gas Operator | Jan 2013 |
41 | Carol-Holly Oil Corporation | Denver, CO 80237 | Oil & Gas Operator | Oct 2024 |
42 | Cenex | | Oil & Gas Operator | Dec 1996 |
43 | Central Resources Inc | Denver, CO 80203 | Oil & Gas Operator | Dec 2019 |
44 | Century Oil & Gas Corporation | | Oil & Gas Operator | Dec 1987 |
45 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | Oct 2024 |
46 | Chaparral Resources Inc | Denver, CO 80293 | Oil & Gas Operator | Jan 1996 |
47 | Chapman Oil Company | Midland, TX 79702 | Oil & Gas Operator | Oct 2024 |
48 | Cheetah Oil Inc | Casper, WY 82602 | Oil & Gas Operator | Dec 2007 |
49 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Dec 2024 |
50 | Christmann John J | Lubbock, TX 79401 | Oil & Gas Operator | Dec 1994 |
51 | CHS McPherson Refinery Inc | Platteville, CO 80651 | Oil & Gas Operator | Apr 1994 |
52 | Cig Exploration | Denver, CO 80201 | Oil & Gas Operator | Sep 1999 |
53 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Dec 2024 |
54 | Clark Oil Producing Company | | Oil & Gas Operator | Oct 1979 |
55 | Cloud Peak Operating LLC | Casper, WY 82601 | Oil Operator | Aug 2024 |
56 | Coaleum Corporation | Dallas, TX 75205 | Oil & Gas Operator | Jan 2001 |
57 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
58 | Columbus Energy Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
59 | Consolidated Oil & Gas Inc | Wichita, KS 67202 | Oil & Gas Operator | Dec 2012 |
60 | Contango Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
61 | Contango Rocky Mountain Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2020 |
62 | Continental Industries LC | Casper, WY 82602 | Oil & Gas Operator | Feb 2008 |
63 | Continental Production Co LLC | Greenwood VIllage, CO 80155 | Oil & Gas Operator | Aug 2012 |
64 | CR Energy | | Oil & Gas Operator | Dec 1992 |
65 | Creek Oil Company | Colorado Springs, CO 80906 | Oil & Gas Operator | Aug 2001 |
66 | Crowheart Energy LLC | Baggs, WY 82321 | Oil & Gas Operator | Sep 2024 |
67 | Dahill Murray P | Casper, WY 82601 | Oil & Gas Operator | Jun 2007 |
68 | Dalen Resources Oil & Gas Co. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
69 | Davis Oil Company | Pawhuska, OK 74056 | Oil & Gas Operator | Jun 2018 |
70 | Debord Oil Producers | Lincoln, NE 68503 | Oil Operator | Dec 1998 |
71 | Delta Exploration Company Inc | Denver, CO 80202 | Oil & Gas Operator | Dec 2024 |
72 | Denbury Onshore, LLC | Plano, TX 75024 | Oil & Gas Operator | Dec 2024 |
73 | Department Of Energy | Casper, WY 82601 | Oil & Gas Operator | Jan 2015 |
74 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2024 |
75 | Dietrich Resources Corporation | | Oil & Gas Operator | Jun 2007 |
76 | Dome Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2016 |
77 | Dyco Petroleum Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
78 | E & B Natural Resources Management | Guilderland Centek, NY 12085 | Oil & Gas Operator | Oct 2024 |
79 | Eex Corporation | Houston, TX 77060 | Oil & Gas Operator | Feb 2000 |
80 | Elf Aquitaine Inc | Houston, TX 77002 | Oil & Gas Operator | May 1991 |
81 | Elk Petroleum Inc | Casper, WY 82601 | Oil & Gas Operator | Aug 2014 |
82 | Elm Ridge Exploration Company LLC | Bloomfield, NM 87413 | Oil & Gas Operator | Nov 2017 |
83 | Emerald Operating Company | Plano, TX 75075 | Oil & Gas Operator | Oct 2024 |
84 | Enerex Limited Liability Co | Craig, CO 81625 | Oil & Gas Operator | Jun 2024 |
85 | Energy Search Company Inc | Aurora, CO 80011 | Oil & Gas Operator | Jun 2021 |
86 | Envirosearch Corporation | | Oil Operator | Dec 1992 |
87 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Dec 2024 |
88 | EOG Y Resources Inc | Artesia, NM 88210 | Oil & Gas Operator | Feb 2019 |
89 | Equitable Resources Energy Company | Big Stone Gap, VA 24219 | Oil & Gas Operator | Dec 1997 |
90 | Escalera Resources Co | Casper, WY 82602 | Oil & Gas Operator | May 2018 |
91 | Everest Oil & Gas LLC | Santa Barbara, CA 93101 | Oil Operator | Sep 2024 |
92 | Evertson Operating Company Inc | Kimball, NE 69145 | Oil & Gas Operator | Nov 2022 |
93 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Sep 2024 |
94 | Exeter Drilling Company | Denver, CO 80217 | Oil & Gas Operator | Sep 1997 |
95 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Dec 2024 |
96 | Exxonmobil Oil Corp | Houston, TX 77210 | Oil & Gas Operator | Oct 2024 |
97 | Fancher Oil LLC | Greenwood, CO 80111 | Oil & Gas Operator | Nov 2006 |
98 | FDL Operating, LLC | Judson, TX 75660 | Oil & Gas Operator | Dec 2024 |
99 | Ferguson & Bosworth | | Oil & Gas Operator | May 2007 |
100 | Ferguson Oil Company Inc | | Oil & Gas Operator | Apr 1994 |