1 | U S Energy Corp. Of Amer. Inc. | Ranger, TX 76470 | Oil & Gas Operator | Dec 2024 |
2 | U. D. Man, Inc. | San Antonio, TX 78212 | Oil & Gas Operator | Dec 2024 |
3 | U. S. Operating, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Dec 2024 |
4 | U.S. Enercorp, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Jul 2004 |
5 | U.S. Enercorp, LTD. | San Antonio, TX 78209 | Oil & Gas Operator | Sep 2019 |
6 | U.S. Energy Development Corp | Arlington, TX 76011 | Oil & Gas Operator | Dec 2024 |
7 | U.S. Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
8 | U.S. Sovereign Oil And Gas, Inc. | Dallas, TX 75355 | Oil & Gas Operator | Dec 2024 |
9 | U.S.A. Plugging Company | Pearsall, TX 78061 | Oil & Gas Operator | Dec 2024 |
10 | U1 Ranch Oil | Houston, TX 77269 | Oil & Gas Operator | Dec 2024 |
11 | Ubetco, Inc. | Rockdale, TX 76567 | Oil & Gas Operator | Dec 2024 |
12 | Uhc Petroleum Corporation | Rocksprings, TX 78880 | Oil & Gas Operator | Dec 2024 |
13 | Ulatex Oil & Gas Inc. | Nocona, TX 76255 | Oil & Gas Operator | Dec 1998 |
14 | Ultra Oil & Gas, Inc. | Centerton, AR 72719 | Oil & Gas Operator | Dec 2024 |
15 | Ultra Petroleum (U.S.A.), Inc. | Granbury, TX 76048 | Oil & Gas Operator | Sep 2003 |
16 | Ultra Resources Inc | Houston, TX 77060 | Oil & Gas Operator | Sep 2018 |
17 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
18 | Umma Resources, LLC | Portland, TX 78374 | Gas Operator | Dec 2024 |
19 | Unbridled Resources, LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
20 | Underwood, Jim | Graham, TX 76450 | Oil & Gas Operator | Mar 2018 |
21 | Unicorn Energy, Inc. | Elgin, TX 78621 | Oil & Gas Operator | Dec 2024 |
22 | Unified Oil & Gas Corp. | Snyder, TX 79550 | Oil Operator | Dec 2024 |
23 | Union Crude Company | Baytown, TX 77521 | Oil & Gas Operator | Apr 2018 |
24 | Union Crude Operating Co. | Baytown, TX 77521 | Oil Operator | Aug 2003 |
25 | Union Gas Operating Company | Houston, TX 77014 | Oil & Gas Operator | Dec 2024 |
26 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
27 | Union Pacific Austin Chalk Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Jan 2001 |
28 | Union Pacific Resources Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2002 |
29 | Union Royalty, Inc. | Midland, TX 79706 | Oil & Gas Operator | Jul 2014 |
30 | Union Seaboard Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
31 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Dec 2024 |
32 | United Company | Lubbock, TX 79408 | Oil & Gas Operator | Jun 1995 |
33 | United Energy Corporation | San Antonio, TX 78209 | Oil & Gas Operator | Dec 2024 |
34 | United Energy Operating, LLC | Edmond, OK 73083 | Oil & Gas Operator | Dec 2024 |
35 | United Energy Partners, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2008 |
36 | United Energy Trading LLC | Tulsa, OK 74133 | Gas Operator | Feb 2015 |
37 | United Oil & Minerals L. P. | Austin, TX 78746 | Oil & Gas Operator | Jun 2003 |
38 | United Oil & Minerals, Inc. | Austin, TX 78746 | Oil & Gas Operator | Jan 2001 |
39 | United Operating Co. | Olney, TX 76374 | Oil & Gas Operator | Aug 2003 |
40 | United Operating, LLC *** | Midland, TX 79710 | Oil & Gas Operator | Dec 2024 |
41 | United Petroleum & Gas, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2024 |
42 | United Petroleum Technologies | Hondo, TX 78861 | Oil & Gas Operator | Aug 2001 |
43 | United Resources LP | Austin, TX 78746 | Oil & Gas Operator | Oct 2011 |
44 | United States Gypsum Co | Oakfield, NY 14125 | Oil & Gas Operator | Dec 2023 |
45 | United Texas Oil LLC | Houston, TX 77027 | Oil & Gas Operator | Dec 2024 |
46 | United Texas Petroleum Inc. | McKinney, TX 75070 | Oil & Gas Operator | Dec 2024 |
47 | United World Energy, Inc. | Aurora, CO 80040 | Oil & Gas Operator | Dec 2024 |
48 | Unitex Oil & Gas, L.L.C. | Midland, TX 79701 | Oil & Gas Operator | Dec 2024 |
49 | Universal Geopower LLC | Houston, TX 77057 | Oil & Gas Operator | May 2016 |
50 | Universal Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2002 |
51 | Universal Resources Corp. | Salt Lake Cty, UT 84145 | Oil & Gas Operator | Jan 2000 |
52 | Unknown | Houston, TX 77208 | Oil & Gas Operator | Dec 2022 |
53 | Unoso Operating Company L.L.C. | Georgetown, TX 78633 | Oil & Gas Operator | Dec 2024 |
54 | Unswept Oil Company | Corsicana, TX 75151 | Oil & Gas Operator | Jan 2018 |
55 | Untamed Resources, LLC | Spearman, TX 79081 | Gas Operator | Dec 2024 |
56 | Uosi Operating, Inc. | Lovelady, TX 75851 | Oil & Gas Operator | Dec 2024 |
57 | Upcurve Energy, LLC | Houston, TX 77024 | Oil & Gas Operator | Dec 2024 |
58 | Upda Operators, Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Dec 2009 |
59 | Upham Oil & Gas Company | Mineral Wells, TX 76068 | Oil & Gas Operator | Dec 2024 |
60 | Upham, Chester R., Jr. | Mineral Wells, TX 76067 | Oil & Gas Operator | Aug 2001 |
61 | Uphill Consulting LLC | Pearland, TX 77584 | Oil Operator | Dec 2024 |
62 | Upland Exploration, LLC | Boerne, TX 78006 | Oil & Gas Operator | Jul 2024 |
63 | Upland Operating, LLC | Dallas, TX 75226 | Oil & Gas Operator | Dec 2024 |
64 | Upland Production Company | Edmond, OK 73083 | Oil & Gas Operator | Dec 2024 |
65 | Upland Resources LLC | Canadian, TX 79014 | Oil & Gas Operator | Dec 2024 |
66 | Upland Resources, Inc. | Canadian, TX 79014 | Oil & Gas Operator | Dec 2009 |
67 | Uplands Resources Inc | Tulsa, OK 74103-4141 | Oil & Gas Operator | Sep 2024 |
68 | Uplift Production Company, Inc. | Shamrock, TX 79079 | Oil & Gas Operator | Feb 1999 |
69 | Upp Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
70 | Upstream Exploration LLC | Metairie, LA 70002 | Oil & Gas Operator | Jan 2020 |
71 | Upstream Properties, LLC | Southlake, TX 76092 | Oil & Gas Operator | Dec 2024 |
72 | Upstream Resource Partners, LLC | Palestine, TX 75803 | Oil Operator | Dec 2024 |
73 | Uptex Operating Inc. | Dallas, TX 75201 | Oil & Gas Operator | May 2011 |
74 | Uptex Operating, L.P. | Dallas, TX 75201 | Oil & Gas Operator | May 2010 |
75 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Dec 2024 |
76 | Ursa Operating Company LLC | Denver, CO 80265 | Oil & Gas Operator | Dec 2020 |
77 | Ursus Oil And Gas | Tyler, TX 75703 | Oil & Gas Operator | Dec 2024 |
78 | Us Ecology Winnie, LLC | Winnie, TX 77665 | Oil Operator | Dec 2024 |
79 | Us Energy Corp. | Houston, TX 77057 | Oil & Gas Operator | Dec 2021 |
80 | Us Energy Holdings, LLC | Richardson, TX 75080 | Oil & Gas Operator | Dec 2024 |
81 | Us Petro LP | Amarillo, TX 79106 | Oil & Gas Operator | Apr 2020 |
82 | Us. Fuels, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2024 |
83 | USA Superior Energy LLC | Houston, TX 77077 | Oil Operator | Mar 2010 |
84 | USA Tubulars, Inc. | Valley Spring, TX 76885 | Oil & Gas Operator | Dec 1995 |
85 | Usfg Oil & Gas, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Dec 2005 |
86 | Utility Ventures Company | Pasadena, TX 77504 | Oil & Gas Operator | Dec 2024 |
87 | Utoco, LTD. | Midland, TX 79704 | Oil Operator | Dec 2024 |
88 | Uvalde Energy Co. | Austin, TX 78747 | Oil & Gas Operator | Nov 1994 |