1 | Aberdeen Petroleum (USA) Inc. | Abilene, TX 79608 | Oil & Gas Operator | Sep 1994 |
2 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Dec 2024 |
3 | Adams H D LLC | Moorcroft, WY 82721 | Oil & Gas Operator | Nov 2024 |
4 | Advanced Recovery Services Co | Denver, CO 80265 | Oil & Gas Operator | Apr 2007 |
5 | Aexco Petroleum Inc | Denver, CO 80202 | Oil & Gas Operator | Sep 2024 |
6 | Alpha Petrovision Us Inc | Canada, 00100 | Oil & Gas Operator | May 2013 |
7 | Am-West Petroleum Inc | Upton, WY 82730 | Oil & Gas Operator | Sep 2015 |
8 | Amax Oil & Gas Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
9 | American Eagle Oil | Casper, WY 82605 | Oil & Gas Operator | Dec 2012 |
10 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
11 | Ampolex Wy Inc | Gillette, WY 82716 | Oil & Gas Operator | Mar 1997 |
12 | Anchor Bay Corporation | Denver, CO 80202 | Oil & Gas Operator | Jun 2007 |
13 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Dec 2024 |
14 | Argent Energy (Us) Holdings Inc | Sugar Land, TX 77479 | Oil & Gas Operator | Sep 2021 |
15 | Atasca Resources Inc | Houston, TX 77219 | Oil & Gas Operator | Dec 2024 |
16 | Atlantic Richfield Company | Plano, TX 75074 | Oil & Gas Operator | Dec 2016 |
17 | Ballard Petroleum Holdings LLC | Billings, MT 59104 | Oil & Gas Operator | Oct 2024 |
18 | Banding M R Inc | Gillette, WY 82717 | Oil & Gas Operator | Oct 2024 |
19 | Barn Owls LLC | | Oil & Gas Operator | Sep 2024 |
20 | Bataa Oil Inc | Greeley, CO 80634 | Oil & Gas Operator | Oct 2024 |
21 | Beartooth Oil & Gas Company | Billings, MT 59103 | Oil & Gas Operator | Oct 2024 |
22 | Belden & Blake Corporation | North Canton, OH 44720-0500-0500 | Oil & Gas Operator | Dec 2016 |
23 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Dec 2024 |
24 | Berenergy Corporation | Denver, CO 80217 | Oil & Gas Operator | Nov 2024 |
25 | Beta Oil Company Inc | Oklahoma City, OK 73157-2958 | Oil & Gas Operator | Dec 2022 |
26 | BHP Petroleum (USA) Inc | | Oil & Gas Operator | Mar 1993 |
27 | Big Basin Petroleum LLC | Gillette, WY 82717 | Oil & Gas Operator | Oct 2008 |
28 | Big Chief Exploration | Palisades, CO 81526 | Oil & Gas Operator | Oct 1993 |
29 | Black Bank LLC | Billings, MT 59103 | Oil Operator | Oct 2024 |
30 | Black Hills Exploration & Production Inc | Newcastle, WY 82701 | Oil & Gas Operator | May 2018 |
31 | Black Thunder Oil LLC | Gillette, WY 82717 | Oil & Gas Operator | Oct 2024 |
32 | Borchert R V | Sidney, NE 69162 | Oil Operator | Apr 2009 |
33 | Bowden Energy Company Inc | Gillette, WY 82716 | Oil & Gas Operator | Oct 2024 |
34 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Oct 2024 |
35 | Bradley SR Jack C | Newcastle, WY 82701 | Oil Operator | Jun 2010 |
36 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2024 |
37 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2024 |
38 | Burlington Resources Oil & Gas Company L | Gillette, WY 82718 | Oil & Gas Operator | Jan 2022 |
39 | Burr Oil & Gas Inc | Farmington, NM 87499 | Oil & Gas Operator | Oct 2019 |
40 | BW Oil LLC | Hamel, MN 55340 | Oil Operator | Jun 2015 |
41 | Bwab Incorporated | Denver, CO 80202 | Oil & Gas Operator | Aug 1996 |
42 | BXP Operating, LLC | Houston, TX 77079 | Oil & Gas Operator | Dec 2024 |
43 | C & H Well Servicing Inc | Gillette, WY 82717 | Oil & Gas Operator | Oct 2024 |
44 | Cambria Oil Company | Casper, WY 82601 | Oil & Gas Operator | Dec 1996 |
45 | Cardinal Wyoming LLC | | Oil & Gas Operator | Oct 2024 |
46 | Chaparral Resources Inc | Denver, CO 80293 | Oil & Gas Operator | Jan 1996 |
47 | Charger Resources, LLC | Hurst, TX 76054 | Oil & Gas Operator | Aug 2015 |
48 | Chipcore LLC | Casper, WY 82601 | Oil & Gas Operator | Oct 2024 |
49 | CHS McPherson Refinery Inc | Platteville, CO 80651 | Oil & Gas Operator | Apr 1994 |
50 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Dec 2024 |
51 | Clinton Oil Co | Wichita, KS 67202 | Oil & Gas Operator | Apr 1980 |
52 | Columbine Exploration Corp | Englewood, CO 80111 | Oil & Gas Operator | Aug 1998 |
53 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
54 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
55 | Cotton Petroleum Corporation | Tulsa, OK 74102 | Oil & Gas Operator | Jan 2005 |
56 | Daube Company The | Ardmore, OK 73401 | Oil & Gas Operator | Oct 2024 |
57 | Davis Bobby J | Upton, WY 82730 | Oil & Gas Operator | Oct 1989 |
58 | Davis Oil Company | Pawhuska, OK 74056 | Oil & Gas Operator | Jun 2018 |
59 | DCD Inc | Gillette, WY 82716 | Oil & Gas Operator | Aug 2003 |
60 | Decalta International Corp | Denver, CO 80202 | Oil & Gas Operator | Mar 2015 |
61 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2024 |
62 | Diamond B Industries Inc | Belle Fourche, SD 57717 | Oil & Gas Operator | Apr 2010 |
63 | Dominion Oklahoma Texas Expl & Prod Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Aug 2013 |
64 | Duncan Oil Inc | Denver, CO 80210 | Oil & Gas Operator | Jun 2016 |
65 | E & B Natural Resources Management | Guilderland Centek, NY 12085 | Oil & Gas Operator | Oct 2024 |
66 | Ellbogen John P LTD | Casper, WY 82602 | Oil & Gas Operator | Oct 2024 |
67 | Emc Energies Inc | Casper, WY 82604 | Oil Operator | May 1989 |
68 | Emc Energy | | Oil & Gas Operator | Jun 1985 |
69 | Emre Oil LLC | Moorcroft, WY 82721 | Oil Operator | Sep 2024 |
70 | Energy Equity Company | Columbus, MT 59019 | Oil & Gas Operator | Sep 2024 |
71 | Energy Operating Company Inc | Lakewood, CO 80235 | Oil & Gas Operator | Dec 2012 |
72 | Energy Reserves Group | Houston, TX 770563020 | Oil & Gas Operator | Apr 1996 |
73 | EOG Y Resources Inc | Artesia, NM 88210 | Oil & Gas Operator | Feb 2019 |
74 | Equitable Resources Energy Company | Big Stone Gap, VA 24219 | Oil & Gas Operator | Dec 1997 |
75 | Erg Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2015 |
76 | Essex Energy Inc | Yukon, OK 73099-5126 | Oil & Gas Operator | Apr 2014 |
77 | Exeter Drilling Company | Denver, CO 80217 | Oil & Gas Operator | Sep 1997 |
78 | Exxonmobil Oil Corp | Houston, TX 77210 | Oil & Gas Operator | Oct 2024 |
79 | Fancher Oil LLC | Greenwood, CO 80111 | Oil & Gas Operator | Nov 2006 |
80 | Felmont Oil Corporation | Walnut Creek, CA 94596-3568 | Oil & Gas Operator | Feb 1990 |
81 | Ferreira Oil Properties LLC | Carefree, AZ 85377 | Oil Operator | Apr 2014 |
82 | Finley Resources Inc | Fort Worth, TX 76113 | Oil & Gas Operator | Dec 2024 |
83 | Flahive Oil & Gas LLC | Golden, CO 80401 | Oil Operator | Oct 1995 |
84 | Flying J Oil & Gas Inc | North Salt Lake, UT 84054 | Oil & Gas Operator | Dec 2009 |
85 | Four-A Energy LLC | Cody, WY 82414 | Oil Operator | Oct 2024 |
86 | Fremont Energy Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 2004 |
87 | Fuel Exploration Inc | Denver, CO 80295 | Oil & Gas Operator | Jan 1992 |
88 | Gallagher Drilling Inc | Evansville, IN 47730 | Oil Operator | Dec 2020 |
89 | Gary-Williams Production Company | Denver, CO 80202 | Oil & Gas Operator | May 2000 |
90 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
91 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
92 | Goldmark Engineering Inc | Casper, WY 82602 | Oil & Gas Operator | Oct 2004 |
93 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
94 | Granite Creek Energy LLC | | Oil & Gas Operator | Oct 2024 |
95 | Grayling Resources LTD | Lakewood, CO 80235 | Oil & Gas Operator | Jul 2020 |
96 | Great Northern Drilling Company | Billings, MT 59103 | Oil & Gas Operator | Jun 2016 |
97 | H2oil Services LLC | | Oil Operator | Oct 2024 |
98 | Harper Oil Co. | Denver, CO 80217 | Oil & Gas Operator | Aug 2024 |
99 | Hedges Spencer | Casper, WY 82604 | Oil Operator | Mar 2024 |
100 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Dec 2024 |